-/*============================================================================
-
-This C source file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
-Package, Release 2b.
+#define SOFTFLOAT_68K
+
+#include <stdint.h>
+#include <stdlib.h>
+#include "softfloat/softfloat.h"
+
+
+/*
+ * QEMU float support
+ *
+ * The code in this source file is derived from release 2a of the SoftFloat
+ * IEC/IEEE Floating-point Arithmetic Package. Those parts of the code (and
+ * some later contributions) are provided under that license, as detailed below.
+ * It has subsequently been modified by contributors to the QEMU Project,
+ * so some portions are provided under:
+ * the SoftFloat-2a license
+ * the BSD license
+ * GPL-v2-or-later
+ *
+ * Any future contributions to this file after December 1st 2014 will be
+ * taken to be licensed under the Softfloat-2a license unless specifically
+ * indicated otherwise.
+ */
+
+/*
+===============================================================================
+This C source file is part of the SoftFloat IEC/IEEE Floating-point
+Arithmetic Package, Release 2a.
Written by John R. Hauser. This work was made possible in part by the
International Computer Science Institute, located at Suite 600, 1947 Center
of this code was written as part of a project to build a fixed-point vector
processor in collaboration with the University of California at Berkeley,
overseen by Profs. Nelson Morgan and John Wawrzynek. More information
-is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
+is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
arithmetic/SoftFloat.html'.
-THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
-been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
-RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
-AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
-COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
-EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
-INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
-OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort
+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO
+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
Derivative works are acceptable, even for commercial purposes, so long as
-(1) the source code for the derivative work includes prominent notice that
-the work is derivative, and (2) the source code includes prominent notice with
-these four paragraphs for those parts of this code that are retained.
-
-=============================================================================*/
-
-#include "m68kcpu.h" // which includes softfloat.h after defining the basic types
-
-/*----------------------------------------------------------------------------
-| Floating-point rounding mode, extended double-precision rounding precision,
-| and exception flags.
-*----------------------------------------------------------------------------*/
-int8 float_exception_flags = 0;
-#ifdef FLOATX80
-int8 floatx80_rounding_precision = 80;
-#endif
-
-int8 float_rounding_mode = float_round_nearest_even;
+(1) they include prominent notice that the work is derivative, and (2) they
+include prominent notice akin to these four paragraphs for those parts of
+this code that are retained.
+
+===============================================================================
+*/
+
+/* BSD licensing:
+ * Copyright (c) 2006, Fabrice Bellard
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Portions of this work are licensed under the terms of the GNU GPL,
+ * version 2 or later. See the COPYING file in the top-level directory.
+ */
+
+/* We only need stdlib for abort() */
+
+/*----------------------------------------------------------------------------
+| Primitive arithmetic functions, including multi-word arithmetic, and
+| division and square root approximations. (Can be specialized to target if
+| desired.)
+*----------------------------------------------------------------------------*/
+#include "softfloat-macros.h"
+
+/*----------------------------------------------------------------------------
+ | Variables for storing sign, exponent and significand of internal extended
+ | double-precision floating-point value for external use.
+ *----------------------------------------------------------------------------*/
+flag floatx80_internal_sign = 0;
+int32_t floatx80_internal_exp = 0;
+uint64_t floatx80_internal_sig = 0;
+int32_t floatx80_internal_exp0 = 0;
+uint64_t floatx80_internal_sig0 = 0;
+uint64_t floatx80_internal_sig1 = 0;
+int8_t floatx80_internal_precision = 80;
+int8_t floatx80_internal_mode = float_round_nearest_even;
+
+/*----------------------------------------------------------------------------
+ | Functions for storing sign, exponent and significand of extended
+ | double-precision floating-point intermediate result for external use.
+ *----------------------------------------------------------------------------*/
+floatx80 roundSaveFloatx80Internal( int8_t roundingPrecision, flag zSign, int32_t zExp, uint64_t zSig0, uint64_t zSig1, float_status *status )
+{
+ uint64_t roundIncrement, roundMask, roundBits;
+ flag increment;
+
+ if ( roundingPrecision == 80 ) {
+ goto precision80;
+ } else if ( roundingPrecision == 64 ) {
+ roundIncrement = LIT64( 0x0000000000000400 );
+ roundMask = LIT64( 0x00000000000007FF );
+ } else if ( roundingPrecision == 32 ) {
+ roundIncrement = LIT64( 0x0000008000000000 );
+ roundMask = LIT64( 0x000000FFFFFFFFFF );
+ } else {
+ goto precision80;
+ }
+
+ zSig0 |= ( zSig1 != 0 );
+ if ( status->float_rounding_mode != float_round_nearest_even ) {
+ if ( status->float_rounding_mode == float_round_to_zero ) {
+ roundIncrement = 0;
+ } else {
+ roundIncrement = roundMask;
+ if ( zSign ) {
+ if ( status->float_rounding_mode == float_round_up ) roundIncrement = 0;
+ } else {
+ if ( status->float_rounding_mode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+
+ roundBits = zSig0 & roundMask;
+
+ zSig0 += roundIncrement;
+ if ( zSig0 < roundIncrement ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ roundIncrement = roundMask + 1;
+ if ( status->float_rounding_mode == float_round_nearest_even && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ if ( zSig0 == 0 ) zExp = 0;
+ return packFloatx80( zSign, zExp, zSig0 );
+
+precision80:
+ increment = ( (int64_t) zSig1 < 0 );
+ if ( status->float_rounding_mode != float_round_nearest_even ) {
+ if ( status->float_rounding_mode == float_round_to_zero ) {
+ increment = 0;
+ } else {
+ if ( zSign ) {
+ increment = ( status->float_rounding_mode == float_round_down ) && zSig1;
+ } else {
+ increment = ( status->float_rounding_mode == float_round_up ) && zSig1;
+ }
+ }
+ }
+ if ( increment ) {
+ ++zSig0;
+ if ( zSig0 == 0 ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ } else {
+ if ((zSig1 << 1) == 0 && status->float_rounding_mode == float_round_nearest_even)
+ zSig0 &= ~1;
+ }
+ } else {
+ if ( zSig0 == 0 ) zExp = 0;
+ }
+ return packFloatx80( zSign, zExp, zSig0 );
+}
+
+static void saveFloatx80Internal( int8_t prec, flag zSign, int32_t zExp, uint64_t zSig0, uint64_t zSig1, float_status *status )
+{
+ floatx80_internal_sign = zSign;
+ floatx80_internal_exp = zExp;
+ floatx80_internal_sig0 = zSig0;
+ floatx80_internal_sig1 = zSig1;
+ floatx80_internal_precision = prec;
+ floatx80_internal_mode = status->float_rounding_mode;
+}
+
+static void saveFloat64Internal( flag zSign, int16_t zExp, uint64_t zSig, float_status *status )
+{
+ floatx80_internal_sign = zSign;
+ floatx80_internal_exp = zExp + 0x3C01;
+ floatx80_internal_sig0 = zSig<<1;
+ floatx80_internal_sig1 = 0;
+ floatx80_internal_precision = 64;
+ floatx80_internal_mode = status->float_rounding_mode;
+}
+
+static void saveFloat32Internal( flag zSign, int16_t zExp, uint32_t zSig, float_status *status )
+{
+ floatx80 z = roundSaveFloatx80Internal( 32, zSign, zExp + 0x3F81, ( (uint64_t) zSig )<<33, 0, status );
+
+ floatx80_internal_sign = zSign;
+ floatx80_internal_exp = extractFloatx80Exp( z );
+ floatx80_internal_sig = extractFloatx80Frac( z );
+ floatx80_internal_exp0 = zExp + 0x3F81;
+ floatx80_internal_sig0 = ( (uint64_t) zSig )<<33;
+ floatx80_internal_sig1 = 0;
+}
+
+/*----------------------------------------------------------------------------
+ | Functions for returning sign, exponent and significand of extended
+ | double-precision floating-point intermediate result for external use.
+ *----------------------------------------------------------------------------*/
+
+void getRoundedFloatInternal( int8_t roundingPrecision, flag *pzSign, int32_t *pzExp, uint64_t *pzSig )
+{
+ uint64_t roundIncrement, roundMask, roundBits;
+ flag increment;
+
+ flag zSign = floatx80_internal_sign;
+ int32_t zExp = floatx80_internal_exp;
+ uint64_t zSig0 = floatx80_internal_sig0;
+ uint64_t zSig1 = floatx80_internal_sig1;
+
+ if ( roundingPrecision == 80 ) {
+ goto precision80;
+ } else if ( roundingPrecision == 64 ) {
+ roundIncrement = LIT64( 0x0000000000000400 );
+ roundMask = LIT64( 0x00000000000007FF );
+ } else if ( roundingPrecision == 32 ) {
+ roundIncrement = LIT64( 0x0000008000000000 );
+ roundMask = LIT64( 0x000000FFFFFFFFFF );
+ } else {
+ goto precision80;
+ }
+
+ zSig0 |= ( zSig1 != 0 );
+ if ( floatx80_internal_mode != float_round_nearest_even ) {
+ if ( floatx80_internal_mode == float_round_to_zero ) {
+ roundIncrement = 0;
+ } else {
+ roundIncrement = roundMask;
+ if ( zSign ) {
+ if ( floatx80_internal_mode == float_round_up ) roundIncrement = 0;
+ } else {
+ if ( floatx80_internal_mode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+
+ roundBits = zSig0 & roundMask;
+
+ zSig0 += roundIncrement;
+ if ( zSig0 < roundIncrement ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ roundIncrement = roundMask + 1;
+ if ( floatx80_internal_mode == float_round_nearest_even && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ if ( zSig0 == 0 ) zExp = 0;
+
+ *pzSign = zSign;
+ *pzExp = zExp;
+ *pzSig = zSig0;
+ return;
+
+precision80:
+ increment = ( (int64_t) zSig1 < 0 );
+ if ( floatx80_internal_mode != float_round_nearest_even ) {
+ if ( floatx80_internal_mode == float_round_to_zero ) {
+ increment = 0;
+ } else {
+ if ( zSign ) {
+ increment = ( floatx80_internal_mode == float_round_down ) && zSig1;
+ } else {
+ increment = ( floatx80_internal_mode == float_round_up ) && zSig1;
+ }
+ }
+ }
+ if ( increment ) {
+ ++zSig0;
+ if ( zSig0 == 0 ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ } else {
+ if ((zSig1 << 1) == 0 && floatx80_internal_mode == float_round_nearest_even)
+ zSig0 &= ~1;
+ }
+ } else {
+ if ( zSig0 == 0 ) zExp = 0;
+ }
+
+ *pzSign = zSign;
+ *pzExp = zExp;
+ *pzSig = zSig0;
+}
+
+floatx80 getFloatInternalOverflow( void )
+{
+ flag zSign;
+ int32_t zExp;
+ uint64_t zSig;
+
+ getRoundedFloatInternal( floatx80_internal_precision, &zSign, &zExp, &zSig );
+
+ if (zExp > (0x7fff + 0x6000)) { // catastrophic
+ zExp = 0;
+ } else {
+ zExp -= 0x6000;
+ }
+
+ return packFloatx80( zSign, zExp, zSig );
+
+}
+
+floatx80 getFloatInternalUnderflow( void )
+{
+ flag zSign;
+ int32_t zExp;
+ uint64_t zSig;
+
+ getRoundedFloatInternal( floatx80_internal_precision, &zSign, &zExp, &zSig );
+
+ if (zExp < (0x0000 - 0x6000)) { // catastrophic
+ zExp = 0;
+ } else {
+ zExp += 0x6000;
+ }
+
+ return packFloatx80( zSign, zExp, zSig );
+
+}
+
+floatx80 getFloatInternalRoundedAll( void )
+{
+ flag zSign;
+ int32_t zExp;
+ uint64_t zSig, zSig32, zSig64, zSig80;
+
+ if (floatx80_internal_precision == 80) {
+ getRoundedFloatInternal( 80, &zSign, &zExp, &zSig80 );
+ zSig = zSig80;
+ } else if (floatx80_internal_precision == 64) {
+ getRoundedFloatInternal( 80, &zSign, &zExp, &zSig80 );
+ getRoundedFloatInternal( 64, &zSign, &zExp, &zSig64 );
+ zSig = zSig64;
+ zSig |= zSig80 & LIT64( 0x00000000000007FF );
+ } else {
+ getRoundedFloatInternal( 80, &zSign, &zExp, &zSig80 );
+ getRoundedFloatInternal( 64, &zSign, &zExp, &zSig64 );
+ getRoundedFloatInternal( 32, &zSign, &zExp, &zSig32 );
+ zSig = zSig32;
+ zSig |= zSig64 & LIT64( 0x000000FFFFFFFFFF );
+ zSig |= zSig80 & LIT64( 0x00000000000007FF );
+ }
+
+ return packFloatx80( zSign, zExp & 0x7FFF, zSig );
+
+}
+
+floatx80 getFloatInternalRoundedSome( void )
+{
+ flag zSign;
+ int32_t zExp;
+ uint64_t zSig, zSig32, zSig64, zSig80;
+
+ if (floatx80_internal_precision == 80) {
+ getRoundedFloatInternal( 80, &zSign, &zExp, &zSig80 );
+ zSig = zSig80;
+ } else if (floatx80_internal_precision == 64) {
+ getRoundedFloatInternal( 64, &zSign, &zExp, &zSig64 );
+ zSig80 = floatx80_internal_sig0;
+ if (zSig64 != (zSig80 & LIT64( 0xFFFFFFFFFFFFF800 ))) {
+ zSig80++;
+ }
+ zSig = zSig64;
+ zSig |= zSig80 & LIT64( 0x00000000000007FF );
+ } else {
+ getRoundedFloatInternal( 32, &zSign, &zExp, &zSig32 );
+ zSig80 = floatx80_internal_sig0;
+ if (zSig32 != (zSig80 & LIT64( 0xFFFFFF0000000000 ))) {
+ zSig80++;
+ }
+ zSig = zSig32;
+ zSig |= zSig80 & LIT64( 0x000000FFFFFFFFFF );
+ }
+
+ return packFloatx80( zSign, zExp & 0x7FFF, zSig );
+
+}
+
+floatx80 getFloatInternalFloatx80( void )
+{
+ flag zSign;
+ int32_t zExp;
+ uint64_t zSig;
+
+ getRoundedFloatInternal( 80, &zSign, &zExp, &zSig );
+
+ return packFloatx80( zSign, zExp & 0x7FFF, zSig );
+
+}
+
+floatx80 getFloatInternalUnrounded( void )
+{
+ flag zSign = floatx80_internal_sign;
+ int32_t zExp = floatx80_internal_exp;
+ uint64_t zSig = floatx80_internal_sig0;
+
+ return packFloatx80( zSign, zExp & 0x7FFF, zSig );
+
+}
+
+uint64_t getFloatInternalGRS( void )
+{
+#if 1
+ if (floatx80_internal_sig1)
+ return 5;
+
+ if (floatx80_internal_precision == 64 &&
+ floatx80_internal_sig0 & LIT64( 0x00000000000007FF )) {
+ return 1;
+ }
+ if (floatx80_internal_precision == 32 &&
+ floatx80_internal_sig0 & LIT64( 0x000000FFFFFFFFFF )) {
+ return 1;
+ }
+
+ return 0;
+#else
+ uint64_t roundbits;
+ shift64RightJamming(floatx80_internal_sig1, 61, &roundbits);
+
+ return roundbits;
+#endif
+}
/*----------------------------------------------------------------------------
| Functions and definitions to determine: (1) whether tininess for underflow
| are propagated from function inputs to output. These details are target-
| specific.
*----------------------------------------------------------------------------*/
-#include "softfloat-specialize"
+#include "softfloat-specialize.h"
+
+/*----------------------------------------------------------------------------
+| Raises the exceptions specified by `flags'. Floating-point traps can be
+| defined here if desired. It is currently not possible for such a trap
+| to substitute a result value. If traps are not implemented, this routine
+| should be simply `float_exception_flags |= flags;'.
+*----------------------------------------------------------------------------*/
+
+void float_raise(uint8_t flags, float_status *status)
+{
+ status->float_exception_flags |= flags;
+}
+
/*----------------------------------------------------------------------------
| Takes a 64-bit fixed-point value `absZ' with binary point between bits 6
| positive or negative integer is returned.
*----------------------------------------------------------------------------*/
-static int32 roundAndPackInt32( flag zSign, bits64 absZ )
-{
- int8 roundingMode;
- flag roundNearestEven;
- int8 roundIncrement, roundBits;
- int32 z;
-
- roundingMode = float_rounding_mode;
- roundNearestEven = ( roundingMode == float_round_nearest_even );
- roundIncrement = 0x40;
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- roundIncrement = 0;
- }
- else {
- roundIncrement = 0x7F;
- if ( zSign ) {
- if ( roundingMode == float_round_up ) roundIncrement = 0;
- }
- else {
- if ( roundingMode == float_round_down ) roundIncrement = 0;
- }
- }
- }
- roundBits = absZ & 0x7F;
- absZ = ( absZ + roundIncrement )>>7;
- absZ &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
- z = absZ;
- if ( zSign ) z = - z;
- if ( ( absZ>>32 ) || ( z && ( ( z < 0 ) ^ zSign ) ) ) {
- float_raise( float_flag_invalid );
- return zSign ? (sbits32) 0x80000000 : 0x7FFFFFFF;
- }
- if ( roundBits ) float_exception_flags |= float_flag_inexact;
- return z;
-
-}
+static int32_t roundAndPackInt32(flag zSign, uint64_t absZ, float_status *status)
+{
+ int8_t roundingMode;
+ flag roundNearestEven;
+ int8_t roundIncrement, roundBits;
+ int32_t z;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ roundIncrement = 0x40;
+ break;
+ case float_round_to_zero:
+ roundIncrement = 0;
+ break;
+ case float_round_up:
+ roundIncrement = zSign ? 0 : 0x7f;
+ break;
+ case float_round_down:
+ roundIncrement = zSign ? 0x7f : 0;
+ break;
+ default:
+ abort();
+ }
+ roundBits = absZ & 0x7F;
+ absZ = ( absZ + roundIncrement )>>7;
+ absZ &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
+ z = absZ;
+ if ( zSign ) z = - z;
+ if ( ( absZ>>32 ) || ( z && ( ( z < 0 ) ^ zSign ) ) ) {
+ float_raise(float_flag_invalid, status);
+ return zSign ? (int32_t) 0x80000000 : 0x7FFFFFFF;
+ }
+ if (roundBits) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ return z;
+
+}
+
+
+#ifdef SOFTFLOAT_68K // 30-01-2017: Added for Previous
+static int16_t roundAndPackInt16( flag zSign, uint64_t absZ, float_status *status )
+{
+ int8_t roundingMode;
+ flag roundNearestEven;
+ int8_t roundIncrement, roundBits;
+ int16_t z;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ roundIncrement = 0x40;
+ if ( ! roundNearestEven ) {
+ if ( roundingMode == float_round_to_zero ) {
+ roundIncrement = 0;
+ }
+ else {
+ roundIncrement = 0x7F;
+ if ( zSign ) {
+ if ( roundingMode == float_round_up ) roundIncrement = 0;
+ }
+ else {
+ if ( roundingMode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+ roundBits = absZ & 0x7F;
+ absZ = ( absZ + roundIncrement )>>7;
+ absZ &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
+ z = absZ;
+ if ( zSign ) z = - z;
+ z = (int16_t) z;
+ if ( ( absZ>>16 ) || ( z && ( ( z < 0 ) ^ zSign ) ) ) {
+ float_raise( float_flag_invalid, status );
+ return zSign ? (int16_t) 0x8000 : 0x7FFF;
+ }
+ if ( roundBits ) status->float_exception_flags |= float_flag_inexact;
+ return z;
+
+}
+
+static int8_t roundAndPackInt8( flag zSign, uint64_t absZ, float_status *status )
+{
+ int8_t roundingMode;
+ flag roundNearestEven;
+ int8_t roundIncrement, roundBits;
+ int8_t z;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ roundIncrement = 0x40;
+ if ( ! roundNearestEven ) {
+ if ( roundingMode == float_round_to_zero ) {
+ roundIncrement = 0;
+ }
+ else {
+ roundIncrement = 0x7F;
+ if ( zSign ) {
+ if ( roundingMode == float_round_up ) roundIncrement = 0;
+ }
+ else {
+ if ( roundingMode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+ roundBits = absZ & 0x7F;
+ absZ = ( absZ + roundIncrement )>>7;
+ absZ &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
+ z = absZ;
+ if ( zSign ) z = - z;
+ z = (int8_t) z;
+ if ( ( absZ>>8 ) || ( z && ( ( z < 0 ) ^ zSign ) ) ) {
+ float_raise( float_flag_invalid, status );
+ return zSign ? (int8_t) 0x80 : 0x7F;
+ }
+ if ( roundBits ) status->float_exception_flags |= float_flag_inexact;
+ return z;
+
+}
+#endif // End of addition for Previous
/*----------------------------------------------------------------------------
| Takes the 128-bit fixed-point value formed by concatenating `absZ0' and
| returned.
*----------------------------------------------------------------------------*/
-static int64 roundAndPackInt64( flag zSign, bits64 absZ0, bits64 absZ1 )
-{
- int8 roundingMode;
- flag roundNearestEven, increment;
- int64 z;
-
- roundingMode = float_rounding_mode;
- roundNearestEven = ( roundingMode == float_round_nearest_even );
- increment = ( (sbits64) absZ1 < 0 );
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- increment = 0;
- }
- else {
- if ( zSign ) {
- increment = ( roundingMode == float_round_down ) && absZ1;
- }
- else {
- increment = ( roundingMode == float_round_up ) && absZ1;
- }
- }
- }
- if ( increment ) {
- ++absZ0;
- if ( absZ0 == 0 ) goto overflow;
- absZ0 &= ~ ( ( (bits64) ( absZ1<<1 ) == 0 ) & roundNearestEven );
- }
- z = absZ0;
- if ( zSign ) z = - z;
- if ( z && ( ( z < 0 ) ^ zSign ) ) {
- overflow:
- float_raise( float_flag_invalid );
- return
- zSign ? (sbits64) LIT64( 0x8000000000000000 )
- : (sbits64) LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- if ( absZ1 ) float_exception_flags |= float_flag_inexact;
- return z;
+static int64_t roundAndPackInt64(flag zSign, uint64_t absZ0, uint64_t absZ1,
+ float_status *status)
+{
+ int8_t roundingMode;
+ flag roundNearestEven, increment;
+ int64_t z;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ increment = ((int64_t) absZ1 < 0);
+ break;
+ case float_round_to_zero:
+ increment = 0;
+ break;
+ case float_round_up:
+ increment = !zSign && absZ1;
+ break;
+ case float_round_down:
+ increment = zSign && absZ1;
+ break;
+ default:
+ abort();
+ }
+ if ( increment ) {
+ ++absZ0;
+ if ( absZ0 == 0 ) goto overflow;
+ absZ0 &= ~ ( ( (uint64_t) ( absZ1<<1 ) == 0 ) & roundNearestEven );
+ }
+ z = absZ0;
+ if ( zSign ) z = - z;
+ if ( z && ( ( z < 0 ) ^ zSign ) ) {
+ overflow:
+ float_raise(float_flag_invalid, status);
+ return
+ zSign ? (uint64_t) LIT64( 0x8000000000000000 )
+ : LIT64( 0x7FFFFFFFFFFFFFFF );
+ }
+ if (absZ1) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ return z;
}
| Returns the fraction bits of the single-precision floating-point value `a'.
*----------------------------------------------------------------------------*/
-static inline bits32 extractFloat32Frac( float32 a )
+static inline uint32_t extractFloat32Frac( float32 a )
{
- return a & 0x007FFFFF;
+
+ return float32_val(a) & 0x007FFFFF;
}
| Returns the exponent bits of the single-precision floating-point value `a'.
*----------------------------------------------------------------------------*/
-static inline int16 extractFloat32Exp( float32 a )
+static inline int extractFloat32Exp(float32 a)
{
- return ( a>>23 ) & 0xFF;
+
+ return ( float32_val(a)>>23 ) & 0xFF;
}
static inline flag extractFloat32Sign( float32 a )
{
- return a>>31;
+
+ return float32_val(a)>>31;
}
*----------------------------------------------------------------------------*/
static void
- normalizeFloat32Subnormal( bits32 aSig, int16 *zExpPtr, bits32 *zSigPtr )
+ normalizeFloat32Subnormal(uint32_t aSig, int *zExpPtr, uint32_t *zSigPtr)
{
- int8 shiftCount;
+ int8_t shiftCount;
- shiftCount = countLeadingZeros32( aSig ) - 8;
- *zSigPtr = aSig<<shiftCount;
- *zExpPtr = 1 - shiftCount;
+ shiftCount = countLeadingZeros32( aSig ) - 8;
+ *zSigPtr = aSig<<shiftCount;
+ *zExpPtr = 1 - shiftCount;
}
| significand.
*----------------------------------------------------------------------------*/
-static inline float32 packFloat32( flag zSign, int16 zExp, bits32 zSig )
+static inline float32 packFloat32(flag zSign, int zExp, uint32_t zSig)
{
- return ( ( (bits32) zSign )<<31 ) + ( ( (bits32) zExp )<<23 ) + zSig;
+
+ return make_float32(
+ ( ( (uint32_t) zSign )<<31 ) + ( ( (uint32_t) zExp )<<23 ) + zSig);
}
| Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-static float32 roundAndPackFloat32( flag zSign, int16 zExp, bits32 zSig )
-{
- int8 roundingMode;
- flag roundNearestEven;
- int8 roundIncrement, roundBits;
- flag isTiny;
-
- roundingMode = float_rounding_mode;
- roundNearestEven = ( roundingMode == float_round_nearest_even );
- roundIncrement = 0x40;
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- roundIncrement = 0;
- }
- else {
- roundIncrement = 0x7F;
- if ( zSign ) {
- if ( roundingMode == float_round_up ) roundIncrement = 0;
- }
- else {
- if ( roundingMode == float_round_down ) roundIncrement = 0;
- }
- }
- }
- roundBits = zSig & 0x7F;
- if ( 0xFD <= (bits16) zExp ) {
- if ( ( 0xFD < zExp )
- || ( ( zExp == 0xFD )
- && ( (sbits32) ( zSig + roundIncrement ) < 0 ) )
- ) {
- float_raise( float_flag_overflow | float_flag_inexact );
- return packFloat32( zSign, 0xFF, 0 ) - ( roundIncrement == 0 );
- }
- if ( zExp < 0 ) {
- isTiny =
- ( float_detect_tininess == float_tininess_before_rounding )
- || ( zExp < -1 )
- || ( zSig + roundIncrement < 0x80000000 );
- shift32RightJamming( zSig, - zExp, &zSig );
- zExp = 0;
- roundBits = zSig & 0x7F;
- if ( isTiny && roundBits ) float_raise( float_flag_underflow );
- }
- }
- if ( roundBits ) float_exception_flags |= float_flag_inexact;
- zSig = ( zSig + roundIncrement )>>7;
- zSig &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
- if ( zSig == 0 ) zExp = 0;
- return packFloat32( zSign, zExp, zSig );
+static float32 roundAndPackFloat32(flag zSign, int zExp, uint32_t zSig,
+ float_status *status)
+{
+ int8_t roundingMode;
+ flag roundNearestEven;
+ int8_t roundIncrement, roundBits;
+ flag isTiny;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ roundIncrement = 0x40;
+ break;
+ case float_round_to_zero:
+ roundIncrement = 0;
+ break;
+ case float_round_up:
+ roundIncrement = zSign ? 0 : 0x7f;
+ break;
+ case float_round_down:
+ roundIncrement = zSign ? 0x7f : 0;
+ break;
+ default:
+ abort();
+ break;
+ }
+ roundBits = zSig & 0x7F;
+ if ( 0xFD <= (uint16_t) zExp ) {
+ if ( ( 0xFD < zExp )
+ || ( ( zExp == 0xFD )
+ && ( (int32_t) ( zSig + roundIncrement ) < 0 ) )
+ ) {
+#ifdef SOFTFLOAT_68K
+ float_raise( float_flag_overflow, status );
+ saveFloat32Internal( zSign, zExp, zSig, status );
+ if ( roundBits ) float_raise( float_flag_inexact, status );
+#else
+ float_raise(float_flag_overflow | float_flag_inexact, status);
+#endif
+ return packFloat32( zSign, 0xFF, - ( roundIncrement == 0 ));
+ }
+ if ( zExp < 0 ) {
+ if (status->flush_to_zero) {
+ //float_raise(float_flag_output_denormal, status);
+ return packFloat32(zSign, 0, 0);
+ }
+ isTiny =
+ (status->float_detect_tininess
+ == float_tininess_before_rounding)
+ || ( zExp < -1 )
+ || ( zSig + roundIncrement < 0x80000000 );
+#ifdef SOFTFLOAT_68K
+ if ( isTiny ) {
+ float_raise( float_flag_underflow, status );
+ saveFloat32Internal( zSign, zExp, zSig, status );
+ }
+#endif
+ shift32RightJamming( zSig, - zExp, &zSig );
+ zExp = 0;
+ roundBits = zSig & 0x7F;
+#ifndef SOFTFLOAT_68K
+ if (isTiny && roundBits)
+ float_raise(float_flag_underflow, status);
+#endif
+ }
+ }
+ if (roundBits) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ zSig = ( zSig + roundIncrement )>>7;
+ zSig &= ~ ( ( ( roundBits ^ 0x40 ) == 0 ) & roundNearestEven );
+ if ( zSig == 0 ) zExp = 0;
+ return packFloat32( zSign, zExp, zSig );
}
/*----------------------------------------------------------------------------
-| Takes an abstract floating-point value having sign `zSign', exponent `zExp',
-| and significand `zSig', and returns the proper single-precision floating-
-| point value corresponding to the abstract input. This routine is just like
-| `roundAndPackFloat32' except that `zSig' does not have to be normalized.
-| Bit 31 of `zSig' must be zero, and `zExp' must be 1 less than the ``true''
-| floating-point exponent.
+| Returns the fraction bits of the double-precision floating-point value `a'.
*----------------------------------------------------------------------------*/
-static float32
- normalizeRoundAndPackFloat32( flag zSign, int16 zExp, bits32 zSig )
+static inline uint64_t extractFloat64Frac( float64 a )
{
- int8 shiftCount;
- shiftCount = countLeadingZeros32( zSig ) - 1;
- return roundAndPackFloat32( zSign, zExp - shiftCount, zSig<<shiftCount );
+ return float64_val(a) & LIT64( 0x000FFFFFFFFFFFFF );
}
/*----------------------------------------------------------------------------
-| Returns the fraction bits of the double-precision floating-point value `a'.
+| Returns the exponent bits of the double-precision floating-point value `a'.
*----------------------------------------------------------------------------*/
-static inline bits64 extractFloat64Frac( float64 a )
+static inline int extractFloat64Exp(float64 a)
{
- return a & LIT64( 0x000FFFFFFFFFFFFF );
+
+ return ( float64_val(a)>>52 ) & 0x7FF;
}
/*----------------------------------------------------------------------------
-| Returns the exponent bits of the double-precision floating-point value `a'.
+| Returns the sign bit of the double-precision floating-point value `a'.
*----------------------------------------------------------------------------*/
-static inline int16 extractFloat64Exp( float64 a )
+static inline flag extractFloat64Sign( float64 a )
{
- return ( a>>52 ) & 0x7FF;
+
+ return float64_val(a)>>63;
}
/*----------------------------------------------------------------------------
-| Returns the sign bit of the double-precision floating-point value `a'.
+| If `a' is denormal and we are in flush-to-zero mode then set the
+| input-denormal exception and return zero. Otherwise just return the value.
*----------------------------------------------------------------------------*/
-
-static inline flag extractFloat64Sign( float64 a )
+float64 float64_squash_input_denormal(float64 a, float_status *status)
{
- return a>>63;
-
+ if (status->flush_inputs_to_zero) {
+ if (extractFloat64Exp(a) == 0 && extractFloat64Frac(a) != 0) {
+ //float_raise(float_flag_input_denormal, status);
+ return make_float64(float64_val(a) & (1ULL << 63));
+ }
+ }
+ return a;
}
/*----------------------------------------------------------------------------
*----------------------------------------------------------------------------*/
static void
- normalizeFloat64Subnormal( bits64 aSig, int16 *zExpPtr, bits64 *zSigPtr )
+ normalizeFloat64Subnormal(uint64_t aSig, int *zExpPtr, uint64_t *zSigPtr)
{
- int8 shiftCount;
+ int8_t shiftCount;
- shiftCount = countLeadingZeros64( aSig ) - 11;
- *zSigPtr = aSig<<shiftCount;
- *zExpPtr = 1 - shiftCount;
+ shiftCount = countLeadingZeros64( aSig ) - 11;
+ *zSigPtr = aSig<<shiftCount;
+ *zExpPtr = 1 - shiftCount;
}
| significand.
*----------------------------------------------------------------------------*/
-static inline float64 packFloat64( flag zSign, int16 zExp, bits64 zSig )
+static inline float64 packFloat64(flag zSign, int zExp, uint64_t zSig)
{
- return ( ( (bits64) zSign )<<63 ) + ( ( (bits64) zExp )<<52 ) + zSig;
+
+ return make_float64(
+ ( ( (uint64_t) zSign )<<63 ) + ( ( (uint64_t) zExp )<<52 ) + zSig);
}
| the inexact exception raised if the abstract input cannot be represented
| exactly. However, if the abstract value is too large, the overflow and
| inexact exceptions are raised and an infinity or maximal finite value is
-| returned. If the abstract value is too small, the input value is rounded
-| to a subnormal number, and the underflow and inexact exceptions are raised
-| if the abstract input cannot be represented exactly as a subnormal double-
+| returned. If the abstract value is too small, the input value is rounded to
+| a subnormal number, and the underflow and inexact exceptions are raised if
+| the abstract input cannot be represented exactly as a subnormal double-
| precision floating-point number.
| The input significand `zSig' has its binary point between bits 62
| and 61, which is 10 bits to the left of the usual location. This shifted
| Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-static float64 roundAndPackFloat64( flag zSign, int16 zExp, bits64 zSig )
+static float64 roundAndPackFloat64(flag zSign, int zExp, uint64_t zSig,
+ float_status *status)
+{
+ int8_t roundingMode;
+ flag roundNearestEven;
+ int roundIncrement, roundBits;
+ flag isTiny;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ roundIncrement = 0x200;
+ break;
+ case float_round_to_zero:
+ roundIncrement = 0;
+ break;
+ case float_round_up:
+ roundIncrement = zSign ? 0 : 0x3ff;
+ break;
+ case float_round_down:
+ roundIncrement = zSign ? 0x3ff : 0;
+ break;
+ default:
+ abort();
+ }
+ roundBits = zSig & 0x3FF;
+ if ( 0x7FD <= (uint16_t) zExp ) {
+ if ( ( 0x7FD < zExp )
+ || ( ( zExp == 0x7FD )
+ && ( (int64_t) ( zSig + roundIncrement ) < 0 ) )
+ ) {
+#ifdef SOFTFLOAT_68K
+ float_raise( float_flag_overflow, status );
+ saveFloat64Internal( zSign, zExp, zSig, status );
+ if ( roundBits ) float_raise( float_flag_inexact, status );
+#else
+ float_raise(float_flag_overflow | float_flag_inexact, status);
+#endif
+ return packFloat64( zSign, 0x7FF, - ( roundIncrement == 0 ));
+ }
+ if ( zExp < 0 ) {
+ if (status->flush_to_zero) {
+ //float_raise(float_flag_output_denormal, status);
+ return packFloat64(zSign, 0, 0);
+ }
+ isTiny =
+ (status->float_detect_tininess
+ == float_tininess_before_rounding)
+ || ( zExp < -1 )
+ || ( zSig + roundIncrement < LIT64( 0x8000000000000000 ) );
+#ifdef SOFTFLOAT_68K
+ if ( isTiny ) {
+ float_raise( float_flag_underflow, status );
+ saveFloat64Internal( zSign, zExp, zSig, status );
+ }
+#endif
+ shift64RightJamming( zSig, - zExp, &zSig );
+ zExp = 0;
+ roundBits = zSig & 0x3FF;
+#ifndef SOFTFLOAT_68K
+ if (isTiny && roundBits)
+ float_raise(float_flag_underflow, status);
+#endif
+ }
+ }
+ if (roundBits) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ zSig = ( zSig + roundIncrement )>>10;
+ zSig &= ~ ( ( ( roundBits ^ 0x200 ) == 0 ) & roundNearestEven );
+ if ( zSig == 0 ) zExp = 0;
+ return packFloat64( zSign, zExp, zSig );
+
+}
+
+/*----------------------------------------------------------------------------
+| Returns the fraction bits of the extended double-precision floating-point
+| value `a'.
+*----------------------------------------------------------------------------*/
+
+uint64_t extractFloatx80Frac( floatx80 a )
{
- int8 roundingMode;
- flag roundNearestEven;
- int16 roundIncrement, roundBits;
- flag isTiny;
-
- roundingMode = float_rounding_mode;
- roundNearestEven = ( roundingMode == float_round_nearest_even );
- roundIncrement = 0x200;
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- roundIncrement = 0;
- }
- else {
- roundIncrement = 0x3FF;
- if ( zSign ) {
- if ( roundingMode == float_round_up ) roundIncrement = 0;
- }
- else {
- if ( roundingMode == float_round_down ) roundIncrement = 0;
- }
- }
- }
- roundBits = zSig & 0x3FF;
- if ( 0x7FD <= (bits16) zExp ) {
- if ( ( 0x7FD < zExp )
- || ( ( zExp == 0x7FD )
- && ( (sbits64) ( zSig + roundIncrement ) < 0 ) )
- ) {
- float_raise( float_flag_overflow | float_flag_inexact );
- return packFloat64( zSign, 0x7FF, 0 ) - ( roundIncrement == 0 );
- }
- if ( zExp < 0 ) {
- isTiny =
- ( float_detect_tininess == float_tininess_before_rounding )
- || ( zExp < -1 )
- || ( zSig + roundIncrement < LIT64( 0x8000000000000000 ) );
- shift64RightJamming( zSig, - zExp, &zSig );
- zExp = 0;
- roundBits = zSig & 0x3FF;
- if ( isTiny && roundBits ) float_raise( float_flag_underflow );
- }
- }
- if ( roundBits ) float_exception_flags |= float_flag_inexact;
- zSig = ( zSig + roundIncrement )>>10;
- zSig &= ~ ( ( ( roundBits ^ 0x200 ) == 0 ) & roundNearestEven );
- if ( zSig == 0 ) zExp = 0;
- return packFloat64( zSign, zExp, zSig );
+
+ return a.low;
}
/*----------------------------------------------------------------------------
-| Takes an abstract floating-point value having sign `zSign', exponent `zExp',
-| and significand `zSig', and returns the proper double-precision floating-
-| point value corresponding to the abstract input. This routine is just like
-| `roundAndPackFloat64' except that `zSig' does not have to be normalized.
-| Bit 63 of `zSig' must be zero, and `zExp' must be 1 less than the ``true''
-| floating-point exponent.
+| Returns the exponent bits of the extended double-precision floating-point
+| value `a'.
*----------------------------------------------------------------------------*/
-static float64
- normalizeRoundAndPackFloat64( flag zSign, int16 zExp, bits64 zSig )
+int32_t extractFloatx80Exp( floatx80 a )
{
- int8 shiftCount;
- shiftCount = countLeadingZeros64( zSig ) - 1;
- return roundAndPackFloat64( zSign, zExp - shiftCount, zSig<<shiftCount );
+ return a.high & 0x7FFF;
}
-#ifdef FLOATX80
+/*----------------------------------------------------------------------------
+| Returns the sign bit of the extended double-precision floating-point value
+| `a'.
+*----------------------------------------------------------------------------*/
+
+flag extractFloatx80Sign( floatx80 a )
+{
+
+ return a.high>>15;
+
+}
/*----------------------------------------------------------------------------
| Normalizes the subnormal extended double-precision floating-point value
| `zSigPtr', respectively.
*----------------------------------------------------------------------------*/
-static void
- normalizeFloatx80Subnormal( bits64 aSig, int32 *zExpPtr, bits64 *zSigPtr )
+void normalizeFloatx80Subnormal( uint64_t aSig, int32_t *zExpPtr, uint64_t *zSigPtr )
{
- int8 shiftCount;
+ int8_t shiftCount;
- shiftCount = countLeadingZeros64( aSig );
- *zSigPtr = aSig<<shiftCount;
+ shiftCount = countLeadingZeros64( aSig );
+ *zSigPtr = aSig<<shiftCount;
+#ifdef SOFTFLOAT_68K
+ *zExpPtr = -shiftCount;
+#else
*zExpPtr = 1 - shiftCount;
+#endif
+}
+
+/*----------------------------------------------------------------------------
+| Packs the sign `zSign', exponent `zExp', and significand `zSig' into an
+| extended double-precision floating-point value, returning the result.
+*----------------------------------------------------------------------------*/
+
+floatx80 packFloatx80( flag zSign, int32_t zExp, uint64_t zSig )
+{
+ floatx80 z;
+
+ z.low = zSig;
+ z.high = ( ( (uint16_t) zSign )<<15 ) + zExp;
+ return z;
}
| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-// roundAndPackFloatx80 is now also used in fyl2x.c
-
-/* static */ floatx80
- roundAndPackFloatx80(
- int8 roundingPrecision, flag zSign, int32 zExp, bits64 zSig0, bits64 zSig1
- )
-{
- int8 roundingMode;
- flag roundNearestEven, increment, isTiny;
- int64 roundIncrement, roundMask, roundBits;
-
- roundingMode = float_rounding_mode;
- roundNearestEven = ( roundingMode == float_round_nearest_even );
- if ( roundingPrecision == 80 ) goto precision80;
- if ( roundingPrecision == 64 ) {
- roundIncrement = LIT64( 0x0000000000000400 );
- roundMask = LIT64( 0x00000000000007FF );
- }
- else if ( roundingPrecision == 32 ) {
- roundIncrement = LIT64( 0x0000008000000000 );
- roundMask = LIT64( 0x000000FFFFFFFFFF );
- }
- else {
- goto precision80;
- }
- zSig0 |= ( zSig1 != 0 );
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- roundIncrement = 0;
- }
- else {
- roundIncrement = roundMask;
- if ( zSign ) {
- if ( roundingMode == float_round_up ) roundIncrement = 0;
- }
- else {
- if ( roundingMode == float_round_down ) roundIncrement = 0;
- }
- }
- }
- roundBits = zSig0 & roundMask;
- if ( 0x7FFD <= (bits32) ( zExp - 1 ) ) {
- if ( ( 0x7FFE < zExp )
- || ( ( zExp == 0x7FFE ) && ( zSig0 + roundIncrement < zSig0 ) )
- ) {
- goto overflow;
- }
+#ifndef SOFTFLOAT_68K
+floatx80 roundAndPackFloatx80(int8_t roundingPrecision, flag zSign,
+ int32_t zExp, uint64_t zSig0, uint64_t zSig1,
+ float_status *status)
+{
+ int8_t roundingMode;
+ flag roundNearestEven, increment, isTiny;
+ int64_t roundIncrement, roundMask, roundBits;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ if ( roundingPrecision == 80 ) goto precision80;
+ if ( roundingPrecision == 64 ) {
+ roundIncrement = LIT64( 0x0000000000000400 );
+ roundMask = LIT64( 0x00000000000007FF );
+ }
+ else if ( roundingPrecision == 32 ) {
+ roundIncrement = LIT64( 0x0000008000000000 );
+ roundMask = LIT64( 0x000000FFFFFFFFFF );
+ }
+ else {
+ goto precision80;
+ }
+ zSig0 |= ( zSig1 != 0 );
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ break;
+ case float_round_to_zero:
+ roundIncrement = 0;
+ break;
+ case float_round_up:
+ roundIncrement = zSign ? 0 : roundMask;
+ break;
+ case float_round_down:
+ roundIncrement = zSign ? roundMask : 0;
+ break;
+ default:
+ abort();
+ }
+ roundBits = zSig0 & roundMask;
+#ifdef SOFTFLOAT_68K
+ if ( 0x7FFE <= (uint32_t) zExp ) {
+#else
+ if ( 0x7FFD <= (uint32_t) ( zExp - 1 ) ) {
+#endif
+ if ( ( 0x7FFE < zExp )
+ || ( ( zExp == 0x7FFE ) && ( zSig0 + roundIncrement < zSig0 ) )
+ ) {
+ goto overflow;
+ }
+#ifdef SOFTFLOAT_68K
+ if ( zExp < 0 ) {
+#else
if ( zExp <= 0 ) {
- isTiny =
- ( float_detect_tininess == float_tininess_before_rounding )
+#endif
+ if (status->flush_to_zero) {
+ //float_raise(float_flag_output_denormal, status);
+ return packFloatx80(zSign, 0, 0);
+ }
+ isTiny =
+ (status->float_detect_tininess
+ == float_tininess_before_rounding)
+#ifdef SOFTFLOAT_68K
+ || ( zExp < -1 )
+#else
|| ( zExp < 0 )
+#endif
|| ( zSig0 <= zSig0 + roundIncrement );
- shift64RightJamming( zSig0, 1 - zExp, &zSig0 );
- zExp = 0;
- roundBits = zSig0 & roundMask;
- if ( isTiny && roundBits ) float_raise( float_flag_underflow );
- if ( roundBits ) float_exception_flags |= float_flag_inexact;
- zSig0 += roundIncrement;
- if ( (sbits64) zSig0 < 0 ) zExp = 1;
- roundIncrement = roundMask + 1;
- if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
- roundMask |= roundIncrement;
- }
- zSig0 &= ~ roundMask;
- return packFloatx80( zSign, zExp, zSig0 );
- }
- }
- if ( roundBits ) float_exception_flags |= float_flag_inexact;
- zSig0 += roundIncrement;
- if ( zSig0 < (bits64)roundIncrement ) {
- ++zExp;
- zSig0 = LIT64( 0x8000000000000000 );
- }
- roundIncrement = roundMask + 1;
- if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
- roundMask |= roundIncrement;
- }
- zSig0 &= ~ roundMask;
- if ( zSig0 == 0 ) zExp = 0;
- return packFloatx80( zSign, zExp, zSig0 );
- precision80:
- increment = ( (sbits64) zSig1 < 0 );
- if ( ! roundNearestEven ) {
- if ( roundingMode == float_round_to_zero ) {
- increment = 0;
- }
- else {
- if ( zSign ) {
- increment = ( roundingMode == float_round_down ) && zSig1;
- }
- else {
- increment = ( roundingMode == float_round_up ) && zSig1;
+#ifdef SOFTFLOAT_68K
+ if ( isTiny ) {
+ float_raise( float_flag_underflow, status );
+ saveFloatx80Internal( zSign, zExp, zSig0, zSig1, status );
}
- }
- }
- if ( 0x7FFD <= (bits32) ( zExp - 1 ) ) {
- if ( ( 0x7FFE < zExp )
- || ( ( zExp == 0x7FFE )
- && ( zSig0 == LIT64( 0xFFFFFFFFFFFFFFFF ) )
- && increment
- )
- ) {
- roundMask = 0;
- overflow:
- float_raise( float_flag_overflow | float_flag_inexact );
+ shift64RightJamming( zSig0, -zExp, &zSig0 );
+#else
+ shift64RightJamming( zSig0, 1 - zExp, &zSig0 );
+#endif
+ zExp = 0;
+ roundBits = zSig0 & roundMask;
+#ifdef SOFTFLOAT_68K
+ if ( isTiny ) float_raise( float_flag_underflow, status );
+#else
+ if (isTiny && roundBits) {
+ float_raise(float_flag_underflow, status);
+ }
+#endif
+if (roundBits) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ zSig0 += roundIncrement;
+#ifndef SOFTFLOAT_68K
+ if ( (int64_t) zSig0 < 0 ) zExp = 1;
+#endif
+ roundIncrement = roundMask + 1;
+ if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ return packFloatx80( zSign, zExp, zSig0 );
+ }
+ }
+ if (roundBits) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ zSig0 += roundIncrement;
+ if ( zSig0 < roundIncrement ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ roundIncrement = roundMask + 1;
+ if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ if ( zSig0 == 0 ) zExp = 0;
+ return packFloatx80( zSign, zExp, zSig0 );
+ precision80:
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ increment = ((int64_t)zSig1 < 0);
+ break;
+ case float_round_to_zero:
+ increment = 0;
+ break;
+ case float_round_up:
+ increment = !zSign && zSig1;
+ break;
+ case float_round_down:
+ increment = zSign && zSig1;
+ break;
+ default:
+ abort();
+ }
+#ifdef SOFTFLOAT_68K
+ if ( 0x7FFE <= (uint32_t) zExp ) {
+#else
+ if ( 0x7FFD <= (uint32_t) ( zExp - 1 ) ) {
+#endif
+ if ( ( 0x7FFE < zExp )
+ || ( ( zExp == 0x7FFE )
+ && ( zSig0 == LIT64( 0xFFFFFFFFFFFFFFFF ) )
+ && increment
+ )
+ ) {
+ roundMask = 0;
+ overflow:
+#ifndef SOFTFLOAT_68K
+ float_raise(float_flag_overflow | float_flag_inexact, status);
+#else
+ float_raise( float_flag_overflow, status );
+ saveFloatx80Internal( zSign, zExp, zSig0, zSig1, status );
+ if ( ( zSig0 & roundMask ) || zSig1 ) float_raise( float_flag_inexact, status );
+#endif
if ( ( roundingMode == float_round_to_zero )
- || ( zSign && ( roundingMode == float_round_up ) )
- || ( ! zSign && ( roundingMode == float_round_down ) )
- ) {
- return packFloatx80( zSign, 0x7FFE, ~ roundMask );
- }
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
+ || ( zSign && ( roundingMode == float_round_up ) )
+ || ( ! zSign && ( roundingMode == float_round_down ) )
+ ) {
+ return packFloatx80( zSign, 0x7FFE, ~ roundMask );
+ }
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+#ifdef SOFTFLOAT_68K
+ if ( zExp < 0 ) {
+#else
if ( zExp <= 0 ) {
- isTiny =
- ( float_detect_tininess == float_tininess_before_rounding )
+#endif
+ isTiny =
+ (status->float_detect_tininess
+ == float_tininess_before_rounding)
+#ifdef SOFTFLOAT_68K
+ || ( zExp < -1 )
+#else
|| ( zExp < 0 )
- || ! increment
- || ( zSig0 < LIT64( 0xFFFFFFFFFFFFFFFF ) );
- shift64ExtraRightJamming( zSig0, zSig1, 1 - zExp, &zSig0, &zSig1 );
- zExp = 0;
- if ( isTiny && zSig1 ) float_raise( float_flag_underflow );
- if ( zSig1 ) float_exception_flags |= float_flag_inexact;
- if ( roundNearestEven ) {
- increment = ( (sbits64) zSig1 < 0 );
- }
- else {
- if ( zSign ) {
- increment = ( roundingMode == float_round_down ) && zSig1;
- }
- else {
- increment = ( roundingMode == float_round_up ) && zSig1;
- }
+#endif
+ || ! increment
+ || ( zSig0 < LIT64( 0xFFFFFFFFFFFFFFFF ) );
+#ifdef SOFTFLOAT_68K
+ if ( isTiny ) {
+ float_raise( float_flag_underflow, status );
+ saveFloatx80Internal( zSign, zExp, zSig0, zSig1, status );
}
- if ( increment ) {
- ++zSig0;
- zSig0 &=
- ~ ( ( (bits64) ( zSig1<<1 ) == 0 ) & roundNearestEven );
- if ( (sbits64) zSig0 < 0 ) zExp = 1;
+ shift64ExtraRightJamming( zSig0, zSig1, -zExp, &zSig0, &zSig1 );
+#else
+ shift64ExtraRightJamming( zSig0, zSig1, 1 - zExp, &zSig0, &zSig1 );
+#endif
+ zExp = 0;
+#ifndef SOFTFLOAT_68K
+ if ( isTiny && zSig1 ) float_raise( float_flag_underflow, status );
+#endif
+ if (zSig1) float_raise(float_flag_inexact, status);
+ switch (roundingMode) {
+ case float_round_nearest_even:
+ case float_round_ties_away:
+ increment = ((int64_t)zSig1 < 0);
+ break;
+ case float_round_to_zero:
+ increment = 0;
+ break;
+ case float_round_up:
+ increment = !zSign && zSig1;
+ break;
+ case float_round_down:
+ increment = zSign && zSig1;
+ break;
+ default:
+ abort();
+ }
+ if ( increment ) {
+ ++zSig0;
+ zSig0 &=
+ ~ ( ( (uint64_t) ( zSig1<<1 ) == 0 ) & roundNearestEven );
+#ifndef SOFTFLOAT_68K
+ if ( (int64_t) zSig0 < 0 ) zExp = 1;
+#endif
+ }
+ return packFloatx80( zSign, zExp, zSig0 );
+ }
+ }
+ if (zSig1) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ if ( increment ) {
+ ++zSig0;
+ if ( zSig0 == 0 ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ else {
+ zSig0 &= ~ ( ( (uint64_t) ( zSig1<<1 ) == 0 ) & roundNearestEven );
+ }
+ }
+ else {
+ if ( zSig0 == 0 ) zExp = 0;
+ }
+ return packFloatx80( zSign, zExp, zSig0 );
+
+}
+
+#else // SOFTFLOAT_68K
+
+floatx80 roundAndPackFloatx80( int8_t roundingPrecision, flag zSign, int32_t zExp, uint64_t zSig0, uint64_t zSig1, float_status *status )
+{
+ int8_t roundingMode;
+ flag roundNearestEven, increment;
+ uint64_t roundIncrement, roundMask, roundBits;
+ int32_t expOffset;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ if ( roundingPrecision == 80 ) goto precision80;
+ if ( roundingPrecision == 64 ) {
+ roundIncrement = LIT64( 0x0000000000000400 );
+ roundMask = LIT64( 0x00000000000007FF );
+ expOffset = 0x3C00;
+ } else if ( roundingPrecision == 32 ) {
+ roundIncrement = LIT64( 0x0000008000000000 );
+ roundMask = LIT64( 0x000000FFFFFFFFFF );
+ expOffset = 0x3F80;
+ } else {
+ goto precision80;
+ }
+ zSig0 |= ( zSig1 != 0 );
+ if ( ! roundNearestEven ) {
+ if ( roundingMode == float_round_to_zero ) {
+ roundIncrement = 0;
+ } else {
+ roundIncrement = roundMask;
+ if ( zSign ) {
+ if ( roundingMode == float_round_up ) roundIncrement = 0;
+ } else {
+ if ( roundingMode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+ roundBits = zSig0 & roundMask;
+ if ( ( ( 0x7FFE - expOffset ) < zExp ) ||
+ ( ( zExp == ( 0x7FFE - expOffset ) ) && ( zSig0 + roundIncrement < zSig0 ) ) ) {
+ float_raise( float_flag_overflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
+ if ( zSig0 & roundMask ) float_raise( float_flag_inexact, status );
+ if ( ( roundingMode == float_round_to_zero )
+ || ( zSign && ( roundingMode == float_round_up ) )
+ || ( ! zSign && ( roundingMode == float_round_down ) )
+ ) {
+ return packFloatx80( zSign, 0x7FFE - expOffset, ~ roundMask );
+ }
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+ if ( zExp < ( expOffset + 1 ) ) {
+ float_raise( float_flag_underflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
+ shift64RightJamming( zSig0, -( zExp - ( expOffset + 1 ) ), &zSig0 );
+ zExp = expOffset + 1;
+ roundBits = zSig0 & roundMask;
+ if ( roundBits ) float_raise( float_flag_inexact, status );
+ zSig0 += roundIncrement;
+ roundIncrement = roundMask + 1;
+ if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ return packFloatx80( zSign, zExp, zSig0 );
+ }
+ if ( roundBits ) {
+ float_raise( float_flag_inexact, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status);
+ }
+ zSig0 += roundIncrement;
+ if ( zSig0 < roundIncrement ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ roundIncrement = roundMask + 1;
+ if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ if ( zSig0 == 0 ) zExp = 0;
+ return packFloatx80( zSign, zExp, zSig0 );
+precision80:
+ increment = ( (int64_t) zSig1 < 0 );
+ if ( ! roundNearestEven ) {
+ if ( roundingMode == float_round_to_zero ) {
+ increment = 0;
+ } else {
+ if ( zSign ) {
+ increment = ( roundingMode == float_round_down ) && zSig1;
+ } else {
+ increment = ( roundingMode == float_round_up ) && zSig1;
+ }
+ }
+ }
+ if ( 0x7FFE <= (uint32_t) zExp ) {
+ if ( ( 0x7FFE < zExp ) ||
+ ( ( zExp == 0x7FFE ) && ( zSig0 == LIT64( 0xFFFFFFFFFFFFFFFF ) ) && increment )
+ ) {
+ roundMask = 0;
+ float_raise( float_flag_overflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
+ if ( ( zSig0 & roundMask ) || zSig1 ) float_raise( float_flag_inexact, status );
+ if ( ( roundingMode == float_round_to_zero )
+ || ( zSign && ( roundingMode == float_round_up ) )
+ || ( ! zSign && ( roundingMode == float_round_down ) )
+ ) {
+ return packFloatx80( zSign, 0x7FFE, ~ roundMask );
+ }
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+ if ( zExp < 0 ) {
+ float_raise( float_flag_underflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status);
+ shift64ExtraRightJamming( zSig0, zSig1, -zExp, &zSig0, &zSig1 );
+ zExp = 0;
+ if ( zSig1 ) float_raise( float_flag_inexact, status );
+ if ( roundNearestEven ) {
+ increment = ( (int64_t) zSig1 < 0 );
+ } else {
+ if ( zSign ) {
+ increment = ( roundingMode == float_round_down ) && zSig1;
+ } else {
+ increment = ( roundingMode == float_round_up ) && zSig1;
+ }
+ }
+ if ( increment ) {
+ ++zSig0;
+ zSig0 &=
+ ~ ( ( (uint64_t) ( zSig1<<1 ) == 0 ) & roundNearestEven );
+ }
+ return packFloatx80( zSign, zExp, zSig0 );
+ }
+ }
+ if ( zSig1 ) {
+ float_raise( float_flag_inexact, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
+ }
+ if ( increment ) {
+ ++zSig0;
+ if ( zSig0 == 0 ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ } else {
+ zSig0 &= ~ ( ( (uint64_t) ( zSig1<<1 ) == 0 ) & roundNearestEven );
+ }
+ } else {
+ if ( zSig0 == 0 ) zExp = 0;
+ }
+ return packFloatx80( zSign, zExp, zSig0 );
+
+}
+
+#endif
+
+#ifdef SOFTFLOAT_68K // 21-01-2017: Added for Previous
+floatx80 roundSigAndPackFloatx80( int8_t roundingPrecision, flag zSign, int32_t zExp, uint64_t zSig0, uint64_t zSig1, float_status *status )
+{
+ int8_t roundingMode;
+ flag roundNearestEven, isTiny;
+ uint64_t roundIncrement, roundMask, roundBits;
+
+ roundingMode = status->float_rounding_mode;
+ roundNearestEven = ( roundingMode == float_round_nearest_even );
+ if ( roundingPrecision == 32 ) {
+ roundIncrement = LIT64( 0x0000008000000000 );
+ roundMask = LIT64( 0x000000FFFFFFFFFF );
+ } else if ( roundingPrecision == 64 ) {
+ roundIncrement = LIT64( 0x0000000000000400 );
+ roundMask = LIT64( 0x00000000000007FF );
+ } else {
+ return roundAndPackFloatx80( 80, zSign, zExp, zSig0, zSig1, status );
+ }
+ zSig0 |= ( zSig1 != 0 );
+ if ( ! roundNearestEven ) {
+ if ( roundingMode == float_round_to_zero ) {
+ roundIncrement = 0;
+ }
+ else {
+ roundIncrement = roundMask;
+ if ( zSign ) {
+ if ( roundingMode == float_round_up ) roundIncrement = 0;
+ }
+ else {
+ if ( roundingMode == float_round_down ) roundIncrement = 0;
+ }
+ }
+ }
+ roundBits = zSig0 & roundMask;
+
+ if ( 0x7FFE <= (uint32_t) zExp ) {
+ if ( ( 0x7FFE < zExp )
+ || ( ( zExp == 0x7FFE ) && ( zSig0 + roundIncrement < zSig0 ) )
+ ) {
+ float_raise( float_flag_overflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status);
+ if ( zSig0 & roundMask ) float_raise( float_flag_inexact, status );
+ if ( ( roundingMode == float_round_to_zero )
+ || ( zSign && ( roundingMode == float_round_up ) )
+ || ( ! zSign && ( roundingMode == float_round_down ) )
+ ) {
+ return packFloatx80( zSign, 0x7FFE, LIT64( 0xFFFFFFFFFFFFFFFF ) );
+ }
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+
+ if ( zExp < 0 ) {
+ isTiny =
+ ( status->float_detect_tininess == float_tininess_before_rounding )
+ || ( zExp < -1 )
+ || ( zSig0 <= zSig0 + roundIncrement );
+ if ( isTiny ) {
+ float_raise( float_flag_underflow, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
}
- return packFloatx80( zSign, zExp, zSig0 );
- }
- }
- if ( zSig1 ) float_exception_flags |= float_flag_inexact;
- if ( increment ) {
- ++zSig0;
- if ( zSig0 == 0 ) {
- ++zExp;
- zSig0 = LIT64( 0x8000000000000000 );
- }
- else {
- zSig0 &= ~ ( ( (bits64) ( zSig1<<1 ) == 0 ) & roundNearestEven );
- }
- }
- else {
- if ( zSig0 == 0 ) zExp = 0;
- }
- return packFloatx80( zSign, zExp, zSig0 );
+ shift64RightJamming( zSig0, -zExp, &zSig0 );
+ zExp = 0;
+ roundBits = zSig0 & roundMask;
+ if ( roundBits ) float_raise ( float_flag_inexact, status );
+ zSig0 += roundIncrement;
+ if ( roundNearestEven && ( roundBits == roundIncrement ) ) {
+ roundMask |= roundIncrement<<1;
+ }
+ zSig0 &= ~roundMask;
+ return packFloatx80( zSign, zExp, zSig0 );
+ }
+ }
+ if ( roundBits ) {
+ float_raise( float_flag_inexact, status );
+ saveFloatx80Internal( roundingPrecision, zSign, zExp, zSig0, zSig1, status );
+ }
+ zSig0 += roundIncrement;
+ if ( zSig0 < roundIncrement ) {
+ ++zExp;
+ zSig0 = LIT64( 0x8000000000000000 );
+ }
+ roundIncrement = roundMask + 1;
+ if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) {
+ roundMask |= roundIncrement;
+ }
+ zSig0 &= ~ roundMask;
+ if ( zSig0 == 0 ) zExp = 0;
+ return packFloatx80( zSign, zExp, zSig0 );
+
+}
+#endif // End of Addition for Previous
-}
/*----------------------------------------------------------------------------
| Takes an abstract floating-point value having sign `zSign', exponent
| normalized.
*----------------------------------------------------------------------------*/
-static floatx80
- normalizeRoundAndPackFloatx80(
- int8 roundingPrecision, flag zSign, int32 zExp, bits64 zSig0, bits64 zSig1
- )
+static floatx80 normalizeRoundAndPackFloatx80(int8_t roundingPrecision,
+ flag zSign, int32_t zExp,
+ uint64_t zSig0, uint64_t zSig1,
+ float_status *status)
{
- int8 shiftCount;
+ int8_t shiftCount;
- if ( zSig0 == 0 ) {
- zSig0 = zSig1;
- zSig1 = 0;
- zExp -= 64;
- }
- shiftCount = countLeadingZeros64( zSig0 );
- shortShift128Left( zSig0, zSig1, shiftCount, &zSig0, &zSig1 );
- zExp -= shiftCount;
- return
- roundAndPackFloatx80( roundingPrecision, zSign, zExp, zSig0, zSig1 );
+ if ( zSig0 == 0 ) {
+ zSig0 = zSig1;
+ zSig1 = 0;
+ zExp -= 64;
+ }
+ shiftCount = countLeadingZeros64( zSig0 );
+ shortShift128Left( zSig0, zSig1, shiftCount, &zSig0, &zSig1 );
+ zExp -= shiftCount;
+ return roundAndPackFloatx80(roundingPrecision, zSign, zExp,
+ zSig0, zSig1, status);
}
-#endif
-
-#ifdef FLOAT128
-
/*----------------------------------------------------------------------------
-| Returns the least-significant 64 fraction bits of the quadruple-precision
-| floating-point value `a'.
+| Returns the result of converting the 32-bit two's complement integer `a'
+| to the extended double-precision floating-point format. The conversion
+| is performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-static inline bits64 extractFloat128Frac1( float128 a )
+floatx80 int32_to_floatx80(int32_t a)
{
- return a.low;
+ flag zSign;
+ uint32_t absA;
+ int8_t shiftCount;
+ uint64_t zSig;
+
+ if ( a == 0 ) return packFloatx80( 0, 0, 0 );
+ zSign = ( a < 0 );
+ absA = zSign ? - a : a;
+ shiftCount = countLeadingZeros32( absA ) + 32;
+ zSig = absA;
+ return packFloatx80( zSign, 0x403E - shiftCount, zSig<<shiftCount );
}
/*----------------------------------------------------------------------------
-| Returns the most-significant 48 fraction bits of the quadruple-precision
-| floating-point value `a'.
+| Returns the result of converting the single-precision floating-point value
+| `a' to the extended double-precision floating-point format. The conversion
+| is performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-static inline bits64 extractFloat128Frac0( float128 a )
-{
- return a.high & LIT64( 0x0000FFFFFFFFFFFF );
-
-}
+floatx80 float32_to_floatx80(float32 a, float_status *status)
+{
+ flag aSign;
+ int aExp;
+ uint32_t aSig;
+
+ aSig = extractFloat32Frac( a );
+ aExp = extractFloat32Exp( a );
+ aSign = extractFloat32Sign( a );
+ if ( aExp == 0xFF ) {
+ if ( aSig ) return commonNaNToFloatx80( float32ToCommonNaN( a, status ), status );
+ return packFloatx80( aSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ normalizeFloat32Subnormal( aSig, &aExp, &aSig );
+ }
+ aSig |= 0x00800000;
+ return packFloatx80( aSign, aExp + 0x3F80, ( (uint64_t) aSig )<<40 );
+
+}
+
+#ifdef SOFTFLOAT_68K // 31-12-2016: Added for Previous
+floatx80 float32_to_floatx80_allowunnormal(float32 a , float_status *status)
+{
+ (void)status;
+ flag aSign;
+ int16_t aExp;
+ uint32_t aSig;
+
+ aSig = extractFloat32Frac(a);
+ aExp = extractFloat32Exp(a);
+ aSign = extractFloat32Sign(a);
+ if (aExp == 0xFF) {
+ return packFloatx80( aSign, 0x7FFF, ( (uint64_t) aSig )<<40 );
+ }
+ if (aExp == 0) {
+ if (aSig == 0) return packFloatx80(aSign, 0, 0);
+ return packFloatx80(aSign, 0x3F81, ((uint64_t) aSig) << 40);
+ }
+ aSig |= 0x00800000;
+ return packFloatx80(aSign, aExp + 0x3F80, ((uint64_t)aSig) << 40);
+
+}
+#endif // end of addition for Previous
/*----------------------------------------------------------------------------
-| Returns the exponent bits of the quadruple-precision floating-point value
-| `a'.
+| Returns the result of converting the double-precision floating-point value
+| `a' to the extended double-precision floating-point format. The conversion
+| is performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-static inline int32 extractFloat128Exp( float128 a )
-{
- return ( a.high>>48 ) & 0x7FFF;
-
-}
+floatx80 float64_to_floatx80(float64 a, float_status *status)
+{
+ flag aSign;
+ int aExp;
+ uint64_t aSig;
+
+ aSig = extractFloat64Frac( a );
+ aExp = extractFloat64Exp( a );
+ aSign = extractFloat64Sign( a );
+ if ( aExp == 0x7FF ) {
+ if ( aSig ) return commonNaNToFloatx80( float64ToCommonNaN( a, status ), status );
+ return packFloatx80( aSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ normalizeFloat64Subnormal( aSig, &aExp, &aSig );
+ }
+ return
+ packFloatx80(
+ aSign, aExp + 0x3C00, ( aSig | LIT64( 0x0010000000000000 ) )<<11 );
+
+}
+
+#ifdef SOFTFLOAT_68K // 31-12-2016: Added for Previous
+floatx80 float64_to_floatx80_allowunnormal( float64 a, float_status *status )
+{
+ (void)status;
+ flag aSign;
+ int16_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloat64Frac( a );
+ aExp = extractFloat64Exp( a );
+ aSign = extractFloat64Sign( a );
+ if ( aExp == 0x7FF ) {
+ return packFloatx80( aSign, 0x7FFF, aSig<<11 );
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ return packFloatx80( aSign, 0x3C01, aSig<<11 );
+ }
+ return
+ packFloatx80(
+ aSign, aExp + 0x3C00, ( aSig | LIT64( 0x0010000000000000 ) )<<11 );
+
+}
+#endif // end of addition for Previous
/*----------------------------------------------------------------------------
-| Returns the sign bit of the quadruple-precision floating-point value `a'.
+| Returns the result of converting the extended double-precision floating-
+| point value `a' to the 32-bit two's complement integer format. The
+| conversion is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic---which means in particular that the conversion
+| is rounded according to the current rounding mode. If `a' is a NaN, the
+| largest positive integer is returned. Otherwise, if the conversion
+| overflows, the largest integer with the same sign as `a' is returned.
*----------------------------------------------------------------------------*/
-static inline flag extractFloat128Sign( float128 a )
-{
- return a.high>>63;
+int32_t floatx80_to_int32(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, shiftCount;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+#ifdef SOFTFLOAT_68K
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) {
+ a = propagateFloatx80NaNOneArg( a, status );
+ if ( a.low == aSig ) float_raise( float_flag_invalid, status );
+ return (int32_t)(a.low>>32);
+ }
+ float_raise( float_flag_invalid, status );
+ return aSign ? (int32_t) 0x80000000 : 0x7FFFFFFF;
+ }
+#else
+ if ( ( aExp == 0x7FFF ) && (bits64) ( aSig<<1 ) ) aSign = 0;
+#endif
+ shiftCount = 0x4037 - aExp;
+ if ( shiftCount <= 0 ) shiftCount = 1;
+ shift64RightJamming( aSig, shiftCount, &aSig );
+ return roundAndPackInt32(aSign, aSig, status);
+
+}
+
+#ifdef SOFTFLOAT_68K // 30-01-2017: Addition for Previous
+int16_t floatx80_to_int16( floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, shiftCount;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( aExp == 0x7FFF ) {
+ float_raise( float_flag_invalid, status );
+ if ( (uint64_t) ( aSig<<1 ) ) {
+ a = propagateFloatx80NaNOneArg( a, status );
+ if ( a.low == aSig ) float_raise( float_flag_invalid, status );
+ return (int16_t)(a.low>>48);
+ }
+ return aSign ? (int16_t) 0x8000 : 0x7FFF;
+ }
+ shiftCount = 0x4037 - aExp;
+ if ( shiftCount <= 0 ) shiftCount = 1;
+ shift64RightJamming( aSig, shiftCount, &aSig );
+ return roundAndPackInt16( aSign, aSig, status );
+
+}
+int8_t floatx80_to_int8( floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, shiftCount;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) {
+ a = propagateFloatx80NaNOneArg( a, status );
+ if ( a.low == aSig ) float_raise( float_flag_invalid, status );
+ return (int8_t)(a.low>>56);
+ }
+ float_raise( float_flag_invalid, status );
+ return aSign ? (int8_t) 0x80 : 0x7F;
+ }
+ shiftCount = 0x4037 - aExp;
+ if ( shiftCount <= 0 ) shiftCount = 1;
+ shift64RightJamming( aSig, shiftCount, &aSig );
+ return roundAndPackInt8( aSign, aSig, status );
+
+}
+#endif // End of addition for Previous
-}
/*----------------------------------------------------------------------------
-| Normalizes the subnormal quadruple-precision floating-point value
-| represented by the denormalized significand formed by the concatenation of
-| `aSig0' and `aSig1'. The normalized exponent is stored at the location
-| pointed to by `zExpPtr'. The most significant 49 bits of the normalized
-| significand are stored at the location pointed to by `zSig0Ptr', and the
-| least significant 64 bits of the normalized significand are stored at the
-| location pointed to by `zSig1Ptr'.
+| Returns the result of converting the extended double-precision floating-
+| point value `a' to the 32-bit two's complement integer format. The
+| conversion is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic, except that the conversion is always rounded
+| toward zero. If `a' is a NaN, the largest positive integer is returned.
+| Otherwise, if the conversion overflows, the largest integer with the same
+| sign as `a' is returned.
*----------------------------------------------------------------------------*/
-static void
- normalizeFloat128Subnormal(
- bits64 aSig0,
- bits64 aSig1,
- int32 *zExpPtr,
- bits64 *zSig0Ptr,
- bits64 *zSig1Ptr
- )
-{
- int8 shiftCount;
-
- if ( aSig0 == 0 ) {
- shiftCount = countLeadingZeros64( aSig1 ) - 15;
- if ( shiftCount < 0 ) {
- *zSig0Ptr = aSig1>>( - shiftCount );
- *zSig1Ptr = aSig1<<( shiftCount & 63 );
- }
- else {
- *zSig0Ptr = aSig1<<shiftCount;
- *zSig1Ptr = 0;
- }
- *zExpPtr = - shiftCount - 63;
- }
- else {
- shiftCount = countLeadingZeros64( aSig0 ) - 15;
- shortShift128Left( aSig0, aSig1, shiftCount, zSig0Ptr, zSig1Ptr );
- *zExpPtr = 1 - shiftCount;
- }
+int32_t floatx80_to_int32_round_to_zero(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, shiftCount;
+ uint64_t aSig, savedASig;
+ int32_t z;
+
+ if (floatx80_invalid_encoding(a)) {
+ float_raise(float_flag_invalid, status);
+ return 1 << 31;
+ }
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( 0x401E < aExp ) {
+ if ( ( aExp == 0x7FFF ) && (uint64_t) ( aSig<<1 ) ) aSign = 0;
+ goto invalid;
+ }
+ else if ( aExp < 0x3FFF ) {
+ if (aExp || aSig) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ return 0;
+ }
+ shiftCount = 0x403E - aExp;
+ savedASig = aSig;
+ aSig >>= shiftCount;
+ z = aSig;
+ if ( aSign ) z = - z;
+ if ( ( z < 0 ) ^ aSign ) {
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return aSign ? (int32_t) 0x80000000 : 0x7FFFFFFF;
+ }
+ if ( ( aSig<<shiftCount ) != savedASig ) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ return z;
}
-#endif
-
/*----------------------------------------------------------------------------
-| Returns the result of converting the 32-bit two's complement integer `a'
-| to the single-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Returns the result of converting the extended double-precision floating-
+| point value `a' to the 64-bit two's complement integer format. The
+| conversion is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic---which means in particular that the conversion
+| is rounded according to the current rounding mode. If `a' is a NaN,
+| the largest positive integer is returned. Otherwise, if the conversion
+| overflows, the largest integer with the same sign as `a' is returned.
*----------------------------------------------------------------------------*/
-float32 int32_to_float32( int32 a )
-{
- flag zSign;
-
- if ( a == 0 ) return 0;
- if ( a == (sbits32) 0x80000000 ) return packFloat32( 1, 0x9E, 0 );
- zSign = ( a < 0 );
- return normalizeRoundAndPackFloat32( zSign, 0x9C, zSign ? - a : a );
+int64_t floatx80_to_int64(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, shiftCount;
+ uint64_t aSig, aSigExtra;
+
+ if (floatx80_invalid_encoding(a)) {
+ float_raise(float_flag_invalid, status);
+ return 1ULL << 63;
+ }
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ shiftCount = 0x403E - aExp;
+ if ( shiftCount <= 0 ) {
+ if ( shiftCount ) {
+ float_raise(float_flag_invalid, status);
+ if ( ! aSign
+ || ( ( aExp == 0x7FFF )
+ && ( aSig != LIT64( 0x8000000000000000 ) ) )
+ ) {
+ return LIT64( 0x7FFFFFFFFFFFFFFF );
+ }
+ return (int64_t) LIT64( 0x8000000000000000 );
+ }
+ aSigExtra = 0;
+ }
+ else {
+ shift64ExtraRightJamming( aSig, 0, shiftCount, &aSig, &aSigExtra );
+ }
+ return roundAndPackInt64(aSign, aSig, aSigExtra, status);
}
/*----------------------------------------------------------------------------
-| Returns the result of converting the 32-bit two's complement integer `a'
-| to the double-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Returns the result of converting the extended double-precision floating-
+| point value `a' to the single-precision floating-point format. The
+| conversion is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float64 int32_to_float64( int32 a )
-{
- flag zSign;
- uint32 absA;
- int8 shiftCount;
- bits64 zSig;
-
- if ( a == 0 ) return 0;
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros32( absA ) + 21;
- zSig = absA;
- return packFloat64( zSign, 0x432 - shiftCount, zSig<<shiftCount );
+float32 floatx80_to_float32(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) {
+ return commonNaNToFloat32(floatx80ToCommonNaN(a, status));
+ }
+ return packFloat32( aSign, 0xFF, 0 );
+ }
+#ifdef SOFTFLOAT_68K
+ if ( aExp == 0 ) {
+ if ( aSig == 0) return packFloat32( aSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+ shift64RightJamming( aSig, 33, &aSig );
+ aExp -= 0x3F81;
+#else
+ shift64RightJamming( aSig, 33, &aSig );
+ if ( aExp || aSig ) aExp -= 0x3F81;
+#endif
+ return roundAndPackFloat32(aSign, aExp, aSig, status);
}
-#ifdef FLOATX80
-
/*----------------------------------------------------------------------------
-| Returns the result of converting the 32-bit two's complement integer `a'
-| to the extended double-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
+| Returns the result of converting the extended double-precision floating-
+| point value `a' to the double-precision floating-point format. The
+| conversion is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-floatx80 int32_to_floatx80( int32 a )
-{
- flag zSign;
- uint32 absA;
- int8 shiftCount;
- bits64 zSig;
+float64 floatx80_to_float64(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig, zSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) {
+ return commonNaNToFloat64(floatx80ToCommonNaN(a, status), status);
+ }
+ return packFloat64( aSign, 0x7FF, 0 );
+ }
+#ifdef SOFTFLOAT_68K
+ if ( aExp == 0 ) {
+ if ( aSig == 0) return packFloat64( aSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+ shift64RightJamming( aSig, 1, &zSig );
+ aExp -= 0x3C01;
+#else
+ shift64RightJamming( aSig, 1, &zSig );
+ if ( aExp || aSig ) aExp -= 0x3C01;
+#endif
+ return roundAndPackFloat64(aSign, aExp, zSig, status);
+
+}
+
+#ifdef SOFTFLOAT_68K // 31-01-2017
+/*----------------------------------------------------------------------------
+ | Returns the result of converting the extended double-precision floating-
+ | point value `a' to the extended double-precision floating-point format.
+ | The conversion is performed according to the IEC/IEEE Standard for Binary
+ | Floating-Point Arithmetic.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_to_floatx80( floatx80 a, float_status *status )
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF && (uint64_t) ( aSig<<1 ) ) {
+ return propagateFloatx80NaNOneArg( a, status );
+ }
+ if ( aExp == 0 && aSig != 0 ) {
+ return normalizeRoundAndPackFloatx80( status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status );
+ }
+ return a;
+
+}
+#endif
- if ( a == 0 ) return packFloatx80( 0, 0, 0 );
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros32( absA ) + 32;
- zSig = absA;
- return packFloatx80( zSign, 0x403E - shiftCount, zSig<<shiftCount );
-
-}
-
-#endif
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the 32-bit two's complement integer `a' to
-| the quadruple-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 int32_to_float128( int32 a )
-{
- flag zSign;
- uint32 absA;
- int8 shiftCount;
- bits64 zSig0;
-
- if ( a == 0 ) return packFloat128( 0, 0, 0, 0 );
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros32( absA ) + 17;
- zSig0 = absA;
- return packFloat128( zSign, 0x402E - shiftCount, zSig0<<shiftCount, 0 );
-
-}
-
-#endif
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the 64-bit two's complement integer `a'
-| to the single-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 int64_to_float32( int64 a )
-{
- flag zSign;
- uint64 absA;
- int8 shiftCount;
-// bits32 zSig;
-
- if ( a == 0 ) return 0;
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros64( absA ) - 40;
- if ( 0 <= shiftCount ) {
- return packFloat32( zSign, 0x95 - shiftCount, absA<<shiftCount );
- }
- else {
- shiftCount += 7;
- if ( shiftCount < 0 ) {
- shift64RightJamming( absA, - shiftCount, &absA );
- }
- else {
- absA <<= shiftCount;
- }
- return roundAndPackFloat32( zSign, 0x9C - shiftCount, absA );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the 64-bit two's complement integer `a'
-| to the double-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 int64_to_float64( int64 a )
-{
- flag zSign;
-
- if ( a == 0 ) return 0;
- if ( a == (sbits64) LIT64( 0x8000000000000000 ) ) {
- return packFloat64( 1, 0x43E, 0 );
- }
- zSign = ( a < 0 );
- return normalizeRoundAndPackFloat64( zSign, 0x43C, zSign ? - a : a );
-
-}
-
-#ifdef FLOATX80
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the 64-bit two's complement integer `a'
-| to the extended double-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 int64_to_floatx80( int64 a )
-{
- flag zSign;
- uint64 absA;
- int8 shiftCount;
-
- if ( a == 0 ) return packFloatx80( 0, 0, 0 );
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros64( absA );
- return packFloatx80( zSign, 0x403E - shiftCount, absA<<shiftCount );
-
-}
-
-#endif
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the 64-bit two's complement integer `a' to
-| the quadruple-precision floating-point format. The conversion is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 int64_to_float128( int64 a )
-{
- flag zSign;
- uint64 absA;
- int8 shiftCount;
- int32 zExp;
- bits64 zSig0, zSig1;
-
- if ( a == 0 ) return packFloat128( 0, 0, 0, 0 );
- zSign = ( a < 0 );
- absA = zSign ? - a : a;
- shiftCount = countLeadingZeros64( absA ) + 49;
- zExp = 0x406E - shiftCount;
- if ( 64 <= shiftCount ) {
- zSig1 = 0;
- zSig0 = absA;
- shiftCount -= 64;
- }
- else {
- zSig1 = absA;
- zSig0 = 0;
- }
- shortShift128Left( zSig0, zSig1, shiftCount, &zSig0, &zSig1 );
- return packFloat128( zSign, zExp, zSig0, zSig1 );
-
-}
-
-#endif
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the 32-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int32 float32_to_int32( float32 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits32 aSig;
- bits64 aSig64;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( ( aExp == 0xFF ) && aSig ) aSign = 0;
- if ( aExp ) aSig |= 0x00800000;
- shiftCount = 0xAF - aExp;
- aSig64 = aSig;
- aSig64 <<= 32;
- if ( 0 < shiftCount ) shift64RightJamming( aSig64, shiftCount, &aSig64 );
- return roundAndPackInt32( aSign, aSig64 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the 32-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero.
-| If `a' is a NaN, the largest positive integer is returned. Otherwise, if
-| the conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int32 float32_to_int32_round_to_zero( float32 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits32 aSig;
- int32 z;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- shiftCount = aExp - 0x9E;
- if ( 0 <= shiftCount ) {
- if ( a != 0xCF000000 ) {
- float_raise( float_flag_invalid );
- if ( ! aSign || ( ( aExp == 0xFF ) && aSig ) ) return 0x7FFFFFFF;
- }
- return (sbits32) 0x80000000;
- }
- else if ( aExp <= 0x7E ) {
- if ( aExp | aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- aSig = ( aSig | 0x00800000 )<<8;
- z = aSig>>( - shiftCount );
- if ( (bits32) ( aSig<<( shiftCount & 31 ) ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- if ( aSign ) z = - z;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the 64-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int64 float32_to_int64( float32 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits32 aSig;
- bits64 aSig64, aSigExtra;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- shiftCount = 0xBE - aExp;
- if ( shiftCount < 0 ) {
- float_raise( float_flag_invalid );
- if ( ! aSign || ( ( aExp == 0xFF ) && aSig ) ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- if ( aExp ) aSig |= 0x00800000;
- aSig64 = aSig;
- aSig64 <<= 40;
- shift64ExtraRightJamming( aSig64, 0, shiftCount, &aSig64, &aSigExtra );
- return roundAndPackInt64( aSign, aSig64, aSigExtra );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the 64-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero. If
-| `a' is a NaN, the largest positive integer is returned. Otherwise, if the
-| conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int64 float32_to_int64_round_to_zero( float32 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits32 aSig;
- bits64 aSig64;
- int64 z;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- shiftCount = aExp - 0xBE;
- if ( 0 <= shiftCount ) {
- if ( a != 0xDF000000 ) {
- float_raise( float_flag_invalid );
- if ( ! aSign || ( ( aExp == 0xFF ) && aSig ) ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- else if ( aExp <= 0x7E ) {
- if ( aExp | aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- aSig64 = aSig | 0x00800000;
- aSig64 <<= 40;
- z = aSig64>>( - shiftCount );
- if ( (bits64) ( aSig64<<( shiftCount & 63 ) ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- if ( aSign ) z = - z;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the double-precision floating-point format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float32_to_float64( float32 a )
-{
- flag aSign;
- int16 aExp;
- bits32 aSig;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( aExp == 0xFF ) {
- if ( aSig ) return commonNaNToFloat64( float32ToCommonNaN( a ) );
- return packFloat64( aSign, 0x7FF, 0 );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat64( aSign, 0, 0 );
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- --aExp;
- }
- return packFloat64( aSign, aExp + 0x380, ( (bits64) aSig )<<29 );
-
-}
-
-#ifdef FLOATX80
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the extended double-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 float32_to_floatx80( float32 a )
-{
- flag aSign;
- int16 aExp;
- bits32 aSig;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( aExp == 0xFF ) {
- if ( aSig ) return commonNaNToFloatx80( float32ToCommonNaN( a ) );
- return packFloatx80( aSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- aSig |= 0x00800000;
- return packFloatx80( aSign, aExp + 0x3F80, ( (bits64) aSig )<<40 );
-
-}
-
-#endif
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the single-precision floating-point value
-| `a' to the double-precision floating-point format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 float32_to_float128( float32 a )
-{
- flag aSign;
- int16 aExp;
- bits32 aSig;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( aExp == 0xFF ) {
- if ( aSig ) return commonNaNToFloat128( float32ToCommonNaN( a ) );
- return packFloat128( aSign, 0x7FFF, 0, 0 );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat128( aSign, 0, 0, 0 );
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- --aExp;
- }
- return packFloat128( aSign, aExp + 0x3F80, ( (bits64) aSig )<<25, 0 );
-
-}
-
-#endif
-
-/*----------------------------------------------------------------------------
-| Rounds the single-precision floating-point value `a' to an integer, and
-| returns the result as a single-precision floating-point value. The
-| operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_round_to_int( float32 a )
-{
- flag aSign;
- int16 aExp;
- bits32 lastBitMask, roundBitsMask;
- int8 roundingMode;
- float32 z;
-
- aExp = extractFloat32Exp( a );
- if ( 0x96 <= aExp ) {
- if ( ( aExp == 0xFF ) && extractFloat32Frac( a ) ) {
- return propagateFloat32NaN( a, a );
- }
- return a;
- }
- if ( aExp <= 0x7E ) {
- if ( (bits32) ( a<<1 ) == 0 ) return a;
- float_exception_flags |= float_flag_inexact;
- aSign = extractFloat32Sign( a );
- switch ( float_rounding_mode ) {
- case float_round_nearest_even:
- if ( ( aExp == 0x7E ) && extractFloat32Frac( a ) ) {
- return packFloat32( aSign, 0x7F, 0 );
- }
- break;
- case float_round_down:
- return aSign ? 0xBF800000 : 0;
- case float_round_up:
- return aSign ? 0x80000000 : 0x3F800000;
- }
- return packFloat32( aSign, 0, 0 );
- }
- lastBitMask = 1;
- lastBitMask <<= 0x96 - aExp;
- roundBitsMask = lastBitMask - 1;
- z = a;
- roundingMode = float_rounding_mode;
- if ( roundingMode == float_round_nearest_even ) {
- z += lastBitMask>>1;
- if ( ( z & roundBitsMask ) == 0 ) z &= ~ lastBitMask;
- }
- else if ( roundingMode != float_round_to_zero ) {
- if ( extractFloat32Sign( z ) ^ ( roundingMode == float_round_up ) ) {
- z += roundBitsMask;
- }
- }
- z &= ~ roundBitsMask;
- if ( z != a ) float_exception_flags |= float_flag_inexact;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the absolute values of the single-precision
-| floating-point values `a' and `b'. If `zSign' is 1, the sum is negated
-| before being returned. `zSign' is ignored if the result is a NaN.
-| The addition is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static float32 addFloat32Sigs( float32 a, float32 b, flag zSign )
-{
- int16 aExp, bExp, zExp;
- bits32 aSig, bSig, zSig;
- int16 expDiff;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- bSig = extractFloat32Frac( b );
- bExp = extractFloat32Exp( b );
- expDiff = aExp - bExp;
- aSig <<= 6;
- bSig <<= 6;
- if ( 0 < expDiff ) {
- if ( aExp == 0xFF ) {
- if ( aSig ) return propagateFloat32NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig |= 0x20000000;
- }
- shift32RightJamming( bSig, expDiff, &bSig );
- zExp = aExp;
- }
- else if ( expDiff < 0 ) {
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- return packFloat32( zSign, 0xFF, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig |= 0x20000000;
- }
- shift32RightJamming( aSig, - expDiff, &aSig );
- zExp = bExp;
- }
- else {
- if ( aExp == 0xFF ) {
- if ( aSig | bSig ) return propagateFloat32NaN( a, b );
- return a;
- }
- if ( aExp == 0 ) return packFloat32( zSign, 0, ( aSig + bSig )>>6 );
- zSig = 0x40000000 + aSig + bSig;
- zExp = aExp;
- goto roundAndPack;
- }
- aSig |= 0x20000000;
- zSig = ( aSig + bSig )<<1;
- --zExp;
- if ( (sbits32) zSig < 0 ) {
- zSig = aSig + bSig;
- ++zExp;
- }
- roundAndPack:
- return roundAndPackFloat32( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the absolute values of the single-
-| precision floating-point values `a' and `b'. If `zSign' is 1, the
-| difference is negated before being returned. `zSign' is ignored if the
-| result is a NaN. The subtraction is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static float32 subFloat32Sigs( float32 a, float32 b, flag zSign )
-{
- int16 aExp, bExp, zExp;
- bits32 aSig, bSig, zSig;
- int16 expDiff;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- bSig = extractFloat32Frac( b );
- bExp = extractFloat32Exp( b );
- expDiff = aExp - bExp;
- aSig <<= 7;
- bSig <<= 7;
- if ( 0 < expDiff ) goto aExpBigger;
- if ( expDiff < 0 ) goto bExpBigger;
- if ( aExp == 0xFF ) {
- if ( aSig | bSig ) return propagateFloat32NaN( a, b );
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- if ( aExp == 0 ) {
- aExp = 1;
- bExp = 1;
- }
- if ( bSig < aSig ) goto aBigger;
- if ( aSig < bSig ) goto bBigger;
- return packFloat32( float_rounding_mode == float_round_down, 0, 0 );
- bExpBigger:
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- return packFloat32( zSign ^ 1, 0xFF, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig |= 0x40000000;
- }
- shift32RightJamming( aSig, - expDiff, &aSig );
- bSig |= 0x40000000;
- bBigger:
- zSig = bSig - aSig;
- zExp = bExp;
- zSign ^= 1;
- goto normalizeRoundAndPack;
- aExpBigger:
- if ( aExp == 0xFF ) {
- if ( aSig ) return propagateFloat32NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig |= 0x40000000;
- }
- shift32RightJamming( bSig, expDiff, &bSig );
- aSig |= 0x40000000;
- aBigger:
- zSig = aSig - bSig;
- zExp = aExp;
- normalizeRoundAndPack:
- --zExp;
- return normalizeRoundAndPackFloat32( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the single-precision floating-point values `a'
-| and `b'. The operation is performed according to the IEC/IEEE Standard for
-| Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_add( float32 a, float32 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign == bSign ) {
- return addFloat32Sigs( a, b, aSign );
- }
- else {
- return subFloat32Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the single-precision floating-point values
-| `a' and `b'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_sub( float32 a, float32 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign == bSign ) {
- return subFloat32Sigs( a, b, aSign );
- }
- else {
- return addFloat32Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of multiplying the single-precision floating-point values
-| `a' and `b'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_mul( float32 a, float32 b )
-{
- flag aSign, bSign, zSign;
- int16 aExp, bExp, zExp;
- bits32 aSig, bSig;
- bits64 zSig64;
- bits32 zSig;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- bSig = extractFloat32Frac( b );
- bExp = extractFloat32Exp( b );
- bSign = extractFloat32Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0xFF ) {
- if ( aSig || ( ( bExp == 0xFF ) && bSig ) ) {
- return propagateFloat32NaN( a, b );
- }
- if ( ( bExp | bSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- return packFloat32( zSign, 0xFF, 0 );
- }
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- if ( ( aExp | aSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- return packFloat32( zSign, 0xFF, 0 );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat32( zSign, 0, 0 );
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) return packFloat32( zSign, 0, 0 );
- normalizeFloat32Subnormal( bSig, &bExp, &bSig );
- }
- zExp = aExp + bExp - 0x7F;
- aSig = ( aSig | 0x00800000 )<<7;
- bSig = ( bSig | 0x00800000 )<<8;
- shift64RightJamming( ( (bits64) aSig ) * bSig, 32, &zSig64 );
- zSig = zSig64;
- if ( 0 <= (sbits32) ( zSig<<1 ) ) {
- zSig <<= 1;
- --zExp;
- }
- return roundAndPackFloat32( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of dividing the single-precision floating-point value `a'
-| by the corresponding value `b'. The operation is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_div( float32 a, float32 b )
-{
- flag aSign, bSign, zSign;
- int16 aExp, bExp, zExp;
- bits32 aSig, bSig, zSig;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- bSig = extractFloat32Frac( b );
- bExp = extractFloat32Exp( b );
- bSign = extractFloat32Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0xFF ) {
- if ( aSig ) return propagateFloat32NaN( a, b );
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- return packFloat32( zSign, 0xFF, 0 );
- }
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- return packFloat32( zSign, 0, 0 );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- if ( ( aExp | aSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- float_raise( float_flag_divbyzero );
- return packFloat32( zSign, 0xFF, 0 );
- }
- normalizeFloat32Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat32( zSign, 0, 0 );
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- zExp = aExp - bExp + 0x7D;
- aSig = ( aSig | 0x00800000 )<<7;
- bSig = ( bSig | 0x00800000 )<<8;
- if ( bSig <= ( aSig + aSig ) ) {
- aSig >>= 1;
- ++zExp;
- }
- zSig = ( ( (bits64) aSig )<<32 ) / bSig;
- if ( ( zSig & 0x3F ) == 0 ) {
- zSig |= ( (bits64) bSig * zSig != ( (bits64) aSig )<<32 );
- }
- return roundAndPackFloat32( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the remainder of the single-precision floating-point value `a'
-| with respect to the corresponding value `b'. The operation is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_rem( float32 a, float32 b )
-{
- flag aSign, zSign;
- int16 aExp, bExp, expDiff;
- bits32 aSig, bSig;
- bits32 q;
- bits64 aSig64, bSig64, q64;
- bits32 alternateASig;
- sbits32 sigMean;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- bSig = extractFloat32Frac( b );
- bExp = extractFloat32Exp( b );
-// bSign = extractFloat32Sign( b );
- if ( aExp == 0xFF ) {
- if ( aSig || ( ( bExp == 0xFF ) && bSig ) ) {
- return propagateFloat32NaN( a, b );
- }
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- if ( bExp == 0xFF ) {
- if ( bSig ) return propagateFloat32NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- normalizeFloat32Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return a;
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- expDiff = aExp - bExp;
- aSig |= 0x00800000;
- bSig |= 0x00800000;
- if ( expDiff < 32 ) {
- aSig <<= 8;
- bSig <<= 8;
- if ( expDiff < 0 ) {
- if ( expDiff < -1 ) return a;
- aSig >>= 1;
- }
- q = ( bSig <= aSig );
- if ( q ) aSig -= bSig;
- if ( 0 < expDiff ) {
- q = ( ( (bits64) aSig )<<32 ) / bSig;
- q >>= 32 - expDiff;
- bSig >>= 2;
- aSig = ( ( aSig>>1 )<<( expDiff - 1 ) ) - bSig * q;
- }
- else {
- aSig >>= 2;
- bSig >>= 2;
- }
- }
- else {
- if ( bSig <= aSig ) aSig -= bSig;
- aSig64 = ( (bits64) aSig )<<40;
- bSig64 = ( (bits64) bSig )<<40;
- expDiff -= 64;
- while ( 0 < expDiff ) {
- q64 = estimateDiv128To64( aSig64, 0, bSig64 );
- q64 = ( 2 < q64 ) ? q64 - 2 : 0;
- aSig64 = - ( ( bSig * q64 )<<38 );
- expDiff -= 62;
- }
- expDiff += 64;
- q64 = estimateDiv128To64( aSig64, 0, bSig64 );
- q64 = ( 2 < q64 ) ? q64 - 2 : 0;
- q = q64>>( 64 - expDiff );
- bSig <<= 6;
- aSig = ( ( aSig64>>33 )<<( expDiff - 1 ) ) - bSig * q;
- }
- do {
- alternateASig = aSig;
- ++q;
- aSig -= bSig;
- } while ( 0 <= (sbits32) aSig );
- sigMean = aSig + alternateASig;
- if ( ( sigMean < 0 ) || ( ( sigMean == 0 ) && ( q & 1 ) ) ) {
- aSig = alternateASig;
- }
- zSign = ( (sbits32) aSig < 0 );
- if ( zSign ) aSig = - aSig;
- return normalizeRoundAndPackFloat32( aSign ^ zSign, bExp, aSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the square root of the single-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_sqrt( float32 a )
-{
- flag aSign;
- int16 aExp, zExp;
- bits32 aSig, zSig;
- bits64 rem, term;
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( aExp == 0xFF ) {
- if ( aSig ) return propagateFloat32NaN( a, 0 );
- if ( ! aSign ) return a;
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- if ( aSign ) {
- if ( ( aExp | aSig ) == 0 ) return a;
- float_raise( float_flag_invalid );
- return float32_default_nan;
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return 0;
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- zExp = ( ( aExp - 0x7F )>>1 ) + 0x7E;
- aSig = ( aSig | 0x00800000 )<<8;
- zSig = estimateSqrt32( aExp, aSig ) + 2;
- if ( ( zSig & 0x7F ) <= 5 ) {
- if ( zSig < 2 ) {
- zSig = 0x7FFFFFFF;
- goto roundAndPack;
- }
- aSig >>= aExp & 1;
- term = ( (bits64) zSig ) * zSig;
- rem = ( ( (bits64) aSig )<<32 ) - term;
- while ( (sbits64) rem < 0 ) {
- --zSig;
- rem += ( ( (bits64) zSig )<<1 ) | 1;
- }
- zSig |= ( rem != 0 );
- }
- shift32RightJamming( zSig, 1, &zSig );
- roundAndPack:
- return roundAndPackFloat32( 0, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is equal to
-| the corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_eq( float32 a, float32 b )
-{
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- if ( float32_is_signaling_nan( a ) || float32_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- return ( a == b ) || ( (bits32) ( ( a | b )<<1 ) == 0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is less than
-| or equal to the corresponding value `b', and 0 otherwise. The comparison
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_le( float32 a, float32 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign != bSign ) return aSign || ( (bits32) ( ( a | b )<<1 ) == 0 );
- return ( a == b ) || ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_lt( float32 a, float32 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign != bSign ) return aSign && ( (bits32) ( ( a | b )<<1 ) != 0 );
- return ( a != b ) && ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is equal to
-| the corresponding value `b', and 0 otherwise. The invalid exception is
-| raised if either operand is a NaN. Otherwise, the comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_eq_signaling( float32 a, float32 b )
-{
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- return ( a == b ) || ( (bits32) ( ( a | b )<<1 ) == 0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is less than or
-| equal to the corresponding value `b', and 0 otherwise. Quiet NaNs do not
-| cause an exception. Otherwise, the comparison is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_le_quiet( float32 a, float32 b )
-{
- flag aSign, bSign;
-// int16 aExp, bExp;
-
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- if ( float32_is_signaling_nan( a ) || float32_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign != bSign ) return aSign || ( (bits32) ( ( a | b )<<1 ) == 0 );
- return ( a == b ) || ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the single-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause an
-| exception. Otherwise, the comparison is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float32_lt_quiet( float32 a, float32 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat32Exp( a ) == 0xFF ) && extractFloat32Frac( a ) )
- || ( ( extractFloat32Exp( b ) == 0xFF ) && extractFloat32Frac( b ) )
- ) {
- if ( float32_is_signaling_nan( a ) || float32_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat32Sign( a );
- bSign = extractFloat32Sign( b );
- if ( aSign != bSign ) return aSign && ( (bits32) ( ( a | b )<<1 ) != 0 );
- return ( a != b ) && ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the 32-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int32 float64_to_int32( float64 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits64 aSig;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( ( aExp == 0x7FF ) && aSig ) aSign = 0;
- if ( aExp ) aSig |= LIT64( 0x0010000000000000 );
- shiftCount = 0x42C - aExp;
- if ( 0 < shiftCount ) shift64RightJamming( aSig, shiftCount, &aSig );
- return roundAndPackInt32( aSign, aSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the 32-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero.
-| If `a' is a NaN, the largest positive integer is returned. Otherwise, if
-| the conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int32 float64_to_int32_round_to_zero( float64 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits64 aSig, savedASig;
- int32 z;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( 0x41E < aExp ) {
- if ( ( aExp == 0x7FF ) && aSig ) aSign = 0;
- goto invalid;
- }
- else if ( aExp < 0x3FF ) {
- if ( aExp || aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- aSig |= LIT64( 0x0010000000000000 );
- shiftCount = 0x433 - aExp;
- savedASig = aSig;
- aSig >>= shiftCount;
- z = aSig;
- if ( aSign ) z = - z;
- if ( ( z < 0 ) ^ aSign ) {
- invalid:
- float_raise( float_flag_invalid );
- return aSign ? (sbits32) 0x80000000 : 0x7FFFFFFF;
- }
- if ( ( aSig<<shiftCount ) != savedASig ) {
- float_exception_flags |= float_flag_inexact;
- }
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the 64-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int64 float64_to_int64( float64 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits64 aSig, aSigExtra;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp ) aSig |= LIT64( 0x0010000000000000 );
- shiftCount = 0x433 - aExp;
- if ( shiftCount <= 0 ) {
- if ( 0x43E < aExp ) {
- float_raise( float_flag_invalid );
- if ( ! aSign
- || ( ( aExp == 0x7FF )
- && ( aSig != LIT64( 0x0010000000000000 ) ) )
- ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- aSigExtra = 0;
- aSig <<= - shiftCount;
- }
- else {
- shift64ExtraRightJamming( aSig, 0, shiftCount, &aSig, &aSigExtra );
- }
- return roundAndPackInt64( aSign, aSig, aSigExtra );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the 64-bit two's complement integer format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero.
-| If `a' is a NaN, the largest positive integer is returned. Otherwise, if
-| the conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int64 float64_to_int64_round_to_zero( float64 a )
-{
- flag aSign;
- int16 aExp, shiftCount;
- bits64 aSig;
- int64 z;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp ) aSig |= LIT64( 0x0010000000000000 );
- shiftCount = aExp - 0x433;
- if ( 0 <= shiftCount ) {
- if ( 0x43E <= aExp ) {
- if ( a != LIT64( 0xC3E0000000000000 ) ) {
- float_raise( float_flag_invalid );
- if ( ! aSign
- || ( ( aExp == 0x7FF )
- && ( aSig != LIT64( 0x0010000000000000 ) ) )
- ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- z = aSig<<shiftCount;
- }
- else {
- if ( aExp < 0x3FE ) {
- if ( aExp | aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- z = aSig>>( - shiftCount );
- if ( (bits64) ( aSig<<( shiftCount & 63 ) ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- }
- if ( aSign ) z = - z;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the single-precision floating-point format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float64_to_float32( float64 a )
-{
- flag aSign;
- int16 aExp;
- bits64 aSig;
- bits32 zSig;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp == 0x7FF ) {
- if ( aSig ) return commonNaNToFloat32( float64ToCommonNaN( a ) );
- return packFloat32( aSign, 0xFF, 0 );
- }
- shift64RightJamming( aSig, 22, &aSig );
- zSig = aSig;
- if ( aExp || zSig ) {
- zSig |= 0x40000000;
- aExp -= 0x381;
- }
- return roundAndPackFloat32( aSign, aExp, zSig );
-
-}
-
-#ifdef FLOATX80
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the extended double-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 float64_to_floatx80( float64 a )
-{
- flag aSign;
- int16 aExp;
- bits64 aSig;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp == 0x7FF ) {
- if ( aSig ) return commonNaNToFloatx80( float64ToCommonNaN( a ) );
- return packFloatx80( aSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- return
- packFloatx80(
- aSign, aExp + 0x3C00, ( aSig | LIT64( 0x0010000000000000 ) )<<11 );
-
-}
-
-#endif
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the double-precision floating-point value
-| `a' to the quadruple-precision floating-point format. The conversion is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 float64_to_float128( float64 a )
-{
- flag aSign;
- int16 aExp;
- bits64 aSig, zSig0, zSig1;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp == 0x7FF ) {
- if ( aSig ) return commonNaNToFloat128( float64ToCommonNaN( a ) );
- return packFloat128( aSign, 0x7FFF, 0, 0 );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat128( aSign, 0, 0, 0 );
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- --aExp;
- }
- shift128Right( aSig, 0, 4, &zSig0, &zSig1 );
- return packFloat128( aSign, aExp + 0x3C00, zSig0, zSig1 );
-
-}
-
-#endif
-
-/*----------------------------------------------------------------------------
-| Rounds the double-precision floating-point value `a' to an integer, and
-| returns the result as a double-precision floating-point value. The
-| operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_round_to_int( float64 a )
-{
- flag aSign;
- int16 aExp;
- bits64 lastBitMask, roundBitsMask;
- int8 roundingMode;
- float64 z;
-
- aExp = extractFloat64Exp( a );
- if ( 0x433 <= aExp ) {
- if ( ( aExp == 0x7FF ) && extractFloat64Frac( a ) ) {
- return propagateFloat64NaN( a, a );
- }
- return a;
- }
- if ( aExp < 0x3FF ) {
- if ( (bits64) ( a<<1 ) == 0 ) return a;
- float_exception_flags |= float_flag_inexact;
- aSign = extractFloat64Sign( a );
- switch ( float_rounding_mode ) {
- case float_round_nearest_even:
- if ( ( aExp == 0x3FE ) && extractFloat64Frac( a ) ) {
- return packFloat64( aSign, 0x3FF, 0 );
- }
- break;
- case float_round_down:
- return aSign ? LIT64( 0xBFF0000000000000 ) : 0;
- case float_round_up:
- return
- aSign ? LIT64( 0x8000000000000000 ) : LIT64( 0x3FF0000000000000 );
- }
- return packFloat64( aSign, 0, 0 );
- }
- lastBitMask = 1;
- lastBitMask <<= 0x433 - aExp;
- roundBitsMask = lastBitMask - 1;
- z = a;
- roundingMode = float_rounding_mode;
- if ( roundingMode == float_round_nearest_even ) {
- z += lastBitMask>>1;
- if ( ( z & roundBitsMask ) == 0 ) z &= ~ lastBitMask;
- }
- else if ( roundingMode != float_round_to_zero ) {
- if ( extractFloat64Sign( z ) ^ ( roundingMode == float_round_up ) ) {
- z += roundBitsMask;
- }
- }
- z &= ~ roundBitsMask;
- if ( z != a ) float_exception_flags |= float_flag_inexact;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the absolute values of the double-precision
-| floating-point values `a' and `b'. If `zSign' is 1, the sum is negated
-| before being returned. `zSign' is ignored if the result is a NaN.
-| The addition is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static float64 addFloat64Sigs( float64 a, float64 b, flag zSign )
-{
- int16 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig;
- int16 expDiff;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- bSig = extractFloat64Frac( b );
- bExp = extractFloat64Exp( b );
- expDiff = aExp - bExp;
- aSig <<= 9;
- bSig <<= 9;
- if ( 0 < expDiff ) {
- if ( aExp == 0x7FF ) {
- if ( aSig ) return propagateFloat64NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig |= LIT64( 0x2000000000000000 );
- }
- shift64RightJamming( bSig, expDiff, &bSig );
- zExp = aExp;
- }
- else if ( expDiff < 0 ) {
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- return packFloat64( zSign, 0x7FF, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig |= LIT64( 0x2000000000000000 );
- }
- shift64RightJamming( aSig, - expDiff, &aSig );
- zExp = bExp;
- }
- else {
- if ( aExp == 0x7FF ) {
- if ( aSig | bSig ) return propagateFloat64NaN( a, b );
- return a;
- }
- if ( aExp == 0 ) return packFloat64( zSign, 0, ( aSig + bSig )>>9 );
- zSig = LIT64( 0x4000000000000000 ) + aSig + bSig;
- zExp = aExp;
- goto roundAndPack;
- }
- aSig |= LIT64( 0x2000000000000000 );
- zSig = ( aSig + bSig )<<1;
- --zExp;
- if ( (sbits64) zSig < 0 ) {
- zSig = aSig + bSig;
- ++zExp;
- }
- roundAndPack:
- return roundAndPackFloat64( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the absolute values of the double-
-| precision floating-point values `a' and `b'. If `zSign' is 1, the
-| difference is negated before being returned. `zSign' is ignored if the
-| result is a NaN. The subtraction is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static float64 subFloat64Sigs( float64 a, float64 b, flag zSign )
-{
- int16 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig;
- int16 expDiff;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- bSig = extractFloat64Frac( b );
- bExp = extractFloat64Exp( b );
- expDiff = aExp - bExp;
- aSig <<= 10;
- bSig <<= 10;
- if ( 0 < expDiff ) goto aExpBigger;
- if ( expDiff < 0 ) goto bExpBigger;
- if ( aExp == 0x7FF ) {
- if ( aSig | bSig ) return propagateFloat64NaN( a, b );
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- if ( aExp == 0 ) {
- aExp = 1;
- bExp = 1;
- }
- if ( bSig < aSig ) goto aBigger;
- if ( aSig < bSig ) goto bBigger;
- return packFloat64( float_rounding_mode == float_round_down, 0, 0 );
- bExpBigger:
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- return packFloat64( zSign ^ 1, 0x7FF, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig |= LIT64( 0x4000000000000000 );
- }
- shift64RightJamming( aSig, - expDiff, &aSig );
- bSig |= LIT64( 0x4000000000000000 );
- bBigger:
- zSig = bSig - aSig;
- zExp = bExp;
- zSign ^= 1;
- goto normalizeRoundAndPack;
- aExpBigger:
- if ( aExp == 0x7FF ) {
- if ( aSig ) return propagateFloat64NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig |= LIT64( 0x4000000000000000 );
- }
- shift64RightJamming( bSig, expDiff, &bSig );
- aSig |= LIT64( 0x4000000000000000 );
- aBigger:
- zSig = aSig - bSig;
- zExp = aExp;
- normalizeRoundAndPack:
- --zExp;
- return normalizeRoundAndPackFloat64( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the double-precision floating-point values `a'
-| and `b'. The operation is performed according to the IEC/IEEE Standard for
-| Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_add( float64 a, float64 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign == bSign ) {
- return addFloat64Sigs( a, b, aSign );
- }
- else {
- return subFloat64Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the double-precision floating-point values
-| `a' and `b'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_sub( float64 a, float64 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign == bSign ) {
- return subFloat64Sigs( a, b, aSign );
- }
- else {
- return addFloat64Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of multiplying the double-precision floating-point values
-| `a' and `b'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_mul( float64 a, float64 b )
-{
- flag aSign, bSign, zSign;
- int16 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig0, zSig1;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- bSig = extractFloat64Frac( b );
- bExp = extractFloat64Exp( b );
- bSign = extractFloat64Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0x7FF ) {
- if ( aSig || ( ( bExp == 0x7FF ) && bSig ) ) {
- return propagateFloat64NaN( a, b );
- }
- if ( ( bExp | bSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- return packFloat64( zSign, 0x7FF, 0 );
- }
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- if ( ( aExp | aSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- return packFloat64( zSign, 0x7FF, 0 );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat64( zSign, 0, 0 );
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) return packFloat64( zSign, 0, 0 );
- normalizeFloat64Subnormal( bSig, &bExp, &bSig );
- }
- zExp = aExp + bExp - 0x3FF;
- aSig = ( aSig | LIT64( 0x0010000000000000 ) )<<10;
- bSig = ( bSig | LIT64( 0x0010000000000000 ) )<<11;
- mul64To128( aSig, bSig, &zSig0, &zSig1 );
- zSig0 |= ( zSig1 != 0 );
- if ( 0 <= (sbits64) ( zSig0<<1 ) ) {
- zSig0 <<= 1;
- --zExp;
- }
- return roundAndPackFloat64( zSign, zExp, zSig0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of dividing the double-precision floating-point value `a'
-| by the corresponding value `b'. The operation is performed according to
-| the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_div( float64 a, float64 b )
-{
- flag aSign, bSign, zSign;
- int16 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig;
- bits64 rem0, rem1;
- bits64 term0, term1;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- bSig = extractFloat64Frac( b );
- bExp = extractFloat64Exp( b );
- bSign = extractFloat64Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0x7FF ) {
- if ( aSig ) return propagateFloat64NaN( a, b );
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- return packFloat64( zSign, 0x7FF, 0 );
- }
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- return packFloat64( zSign, 0, 0 );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- if ( ( aExp | aSig ) == 0 ) {
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- float_raise( float_flag_divbyzero );
- return packFloat64( zSign, 0x7FF, 0 );
- }
- normalizeFloat64Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloat64( zSign, 0, 0 );
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- zExp = aExp - bExp + 0x3FD;
- aSig = ( aSig | LIT64( 0x0010000000000000 ) )<<10;
- bSig = ( bSig | LIT64( 0x0010000000000000 ) )<<11;
- if ( bSig <= ( aSig + aSig ) ) {
- aSig >>= 1;
- ++zExp;
- }
- zSig = estimateDiv128To64( aSig, 0, bSig );
- if ( ( zSig & 0x1FF ) <= 2 ) {
- mul64To128( bSig, zSig, &term0, &term1 );
- sub128( aSig, 0, term0, term1, &rem0, &rem1 );
- while ( (sbits64) rem0 < 0 ) {
- --zSig;
- add128( rem0, rem1, 0, bSig, &rem0, &rem1 );
- }
- zSig |= ( rem1 != 0 );
- }
- return roundAndPackFloat64( zSign, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the remainder of the double-precision floating-point value `a'
-| with respect to the corresponding value `b'. The operation is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_rem( float64 a, float64 b )
-{
- flag aSign, zSign;
- int16 aExp, bExp, expDiff;
- bits64 aSig, bSig;
- bits64 q, alternateASig;
- sbits64 sigMean;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- bSig = extractFloat64Frac( b );
- bExp = extractFloat64Exp( b );
-// bSign = extractFloat64Sign( b );
- if ( aExp == 0x7FF ) {
- if ( aSig || ( ( bExp == 0x7FF ) && bSig ) ) {
- return propagateFloat64NaN( a, b );
- }
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- if ( bExp == 0x7FF ) {
- if ( bSig ) return propagateFloat64NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- normalizeFloat64Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return a;
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- expDiff = aExp - bExp;
- aSig = ( aSig | LIT64( 0x0010000000000000 ) )<<11;
- bSig = ( bSig | LIT64( 0x0010000000000000 ) )<<11;
- if ( expDiff < 0 ) {
- if ( expDiff < -1 ) return a;
- aSig >>= 1;
- }
- q = ( bSig <= aSig );
- if ( q ) aSig -= bSig;
- expDiff -= 64;
- while ( 0 < expDiff ) {
- q = estimateDiv128To64( aSig, 0, bSig );
- q = ( 2 < q ) ? q - 2 : 0;
- aSig = - ( ( bSig>>2 ) * q );
- expDiff -= 62;
- }
- expDiff += 64;
- if ( 0 < expDiff ) {
- q = estimateDiv128To64( aSig, 0, bSig );
- q = ( 2 < q ) ? q - 2 : 0;
- q >>= 64 - expDiff;
- bSig >>= 2;
- aSig = ( ( aSig>>1 )<<( expDiff - 1 ) ) - bSig * q;
- }
- else {
- aSig >>= 2;
- bSig >>= 2;
- }
- do {
- alternateASig = aSig;
- ++q;
- aSig -= bSig;
- } while ( 0 <= (sbits64) aSig );
- sigMean = aSig + alternateASig;
- if ( ( sigMean < 0 ) || ( ( sigMean == 0 ) && ( q & 1 ) ) ) {
- aSig = alternateASig;
- }
- zSign = ( (sbits64) aSig < 0 );
- if ( zSign ) aSig = - aSig;
- return normalizeRoundAndPackFloat64( aSign ^ zSign, bExp, aSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the square root of the double-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_sqrt( float64 a )
-{
- flag aSign;
- int16 aExp, zExp;
- bits64 aSig, zSig, doubleZSig;
- bits64 rem0, rem1, term0, term1;
-// float64 z;
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp == 0x7FF ) {
- if ( aSig ) return propagateFloat64NaN( a, a );
- if ( ! aSign ) return a;
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- if ( aSign ) {
- if ( ( aExp | aSig ) == 0 ) return a;
- float_raise( float_flag_invalid );
- return float64_default_nan;
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return 0;
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- zExp = ( ( aExp - 0x3FF )>>1 ) + 0x3FE;
- aSig |= LIT64( 0x0010000000000000 );
- zSig = estimateSqrt32( aExp, aSig>>21 );
- aSig <<= 9 - ( aExp & 1 );
- zSig = estimateDiv128To64( aSig, 0, zSig<<32 ) + ( zSig<<30 );
- if ( ( zSig & 0x1FF ) <= 5 ) {
- doubleZSig = zSig<<1;
- mul64To128( zSig, zSig, &term0, &term1 );
- sub128( aSig, 0, term0, term1, &rem0, &rem1 );
- while ( (sbits64) rem0 < 0 ) {
- --zSig;
- doubleZSig -= 2;
- add128( rem0, rem1, zSig>>63, doubleZSig | 1, &rem0, &rem1 );
- }
- zSig |= ( ( rem0 | rem1 ) != 0 );
- }
- return roundAndPackFloat64( 0, zExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is equal to the
-| corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_eq( float64 a, float64 b )
-{
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- if ( float64_is_signaling_nan( a ) || float64_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- return ( a == b ) || ( (bits64) ( ( a | b )<<1 ) == 0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is less than or
-| equal to the corresponding value `b', and 0 otherwise. The comparison is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_le( float64 a, float64 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign != bSign ) return aSign || ( (bits64) ( ( a | b )<<1 ) == 0 );
- return ( a == b ) || ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_lt( float64 a, float64 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign != bSign ) return aSign && ( (bits64) ( ( a | b )<<1 ) != 0 );
- return ( a != b ) && ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is equal to the
-| corresponding value `b', and 0 otherwise. The invalid exception is raised
-| if either operand is a NaN. Otherwise, the comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_eq_signaling( float64 a, float64 b )
-{
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- return ( a == b ) || ( (bits64) ( ( a | b )<<1 ) == 0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is less than or
-| equal to the corresponding value `b', and 0 otherwise. Quiet NaNs do not
-| cause an exception. Otherwise, the comparison is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_le_quiet( float64 a, float64 b )
-{
- flag aSign, bSign;
-// int16 aExp, bExp;
-
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- if ( float64_is_signaling_nan( a ) || float64_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign != bSign ) return aSign || ( (bits64) ( ( a | b )<<1 ) == 0 );
- return ( a == b ) || ( aSign ^ ( a < b ) );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the double-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause an
-| exception. Otherwise, the comparison is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float64_lt_quiet( float64 a, float64 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat64Exp( a ) == 0x7FF ) && extractFloat64Frac( a ) )
- || ( ( extractFloat64Exp( b ) == 0x7FF ) && extractFloat64Frac( b ) )
- ) {
- if ( float64_is_signaling_nan( a ) || float64_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat64Sign( a );
- bSign = extractFloat64Sign( b );
- if ( aSign != bSign ) return aSign && ( (bits64) ( ( a | b )<<1 ) != 0 );
- return ( a != b ) && ( aSign ^ ( a < b ) );
-
-}
-
-#ifdef FLOATX80
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the 32-bit two's complement integer format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic---which means in particular that the conversion
-| is rounded according to the current rounding mode. If `a' is a NaN, the
-| largest positive integer is returned. Otherwise, if the conversion
-| overflows, the largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int32 floatx80_to_int32( floatx80 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( ( aExp == 0x7FFF ) && (bits64) ( aSig<<1 ) ) aSign = 0;
- shiftCount = 0x4037 - aExp;
- if ( shiftCount <= 0 ) shiftCount = 1;
- shift64RightJamming( aSig, shiftCount, &aSig );
- return roundAndPackInt32( aSign, aSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the 32-bit two's complement integer format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic, except that the conversion is always rounded
-| toward zero. If `a' is a NaN, the largest positive integer is returned.
-| Otherwise, if the conversion overflows, the largest integer with the same
-| sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int32 floatx80_to_int32_round_to_zero( floatx80 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig, savedASig;
- int32 z;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( 0x401E < aExp ) {
- if ( ( aExp == 0x7FFF ) && (bits64) ( aSig<<1 ) ) aSign = 0;
- goto invalid;
- }
- else if ( aExp < 0x3FFF ) {
- if ( aExp || aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- shiftCount = 0x403E - aExp;
- savedASig = aSig;
- aSig >>= shiftCount;
- z = aSig;
- if ( aSign ) z = - z;
- if ( ( z < 0 ) ^ aSign ) {
- invalid:
- float_raise( float_flag_invalid );
- return aSign ? (sbits32) 0x80000000 : 0x7FFFFFFF;
- }
- if ( ( aSig<<shiftCount ) != savedASig ) {
- float_exception_flags |= float_flag_inexact;
- }
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the 64-bit two's complement integer format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic---which means in particular that the conversion
-| is rounded according to the current rounding mode. If `a' is a NaN,
-| the largest positive integer is returned. Otherwise, if the conversion
-| overflows, the largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int64 floatx80_to_int64( floatx80 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig, aSigExtra;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- shiftCount = 0x403E - aExp;
- if ( shiftCount <= 0 ) {
- if ( shiftCount ) {
- float_raise( float_flag_invalid );
- if ( ! aSign
- || ( ( aExp == 0x7FFF )
- && ( aSig != LIT64( 0x8000000000000000 ) ) )
- ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- aSigExtra = 0;
- }
- else {
- shift64ExtraRightJamming( aSig, 0, shiftCount, &aSig, &aSigExtra );
- }
- return roundAndPackInt64( aSign, aSig, aSigExtra );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the 64-bit two's complement integer format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic, except that the conversion is always rounded
-| toward zero. If `a' is a NaN, the largest positive integer is returned.
-| Otherwise, if the conversion overflows, the largest integer with the same
-| sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int64 floatx80_to_int64_round_to_zero( floatx80 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig;
- int64 z;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- shiftCount = aExp - 0x403E;
- if ( 0 <= shiftCount ) {
- aSig &= LIT64( 0x7FFFFFFFFFFFFFFF );
- if ( ( a.high != 0xC03E ) || aSig ) {
- float_raise( float_flag_invalid );
- if ( ! aSign || ( ( aExp == 0x7FFF ) && aSig ) ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- else if ( aExp < 0x3FFF ) {
- if ( aExp | aSig ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- z = aSig>>( - shiftCount );
- if ( (bits64) ( aSig<<( shiftCount & 63 ) ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- if ( aSign ) z = - z;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the single-precision floating-point format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 floatx80_to_float32( floatx80 a )
-{
- flag aSign;
- int32 aExp;
- bits64 aSig;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 ) ) {
- return commonNaNToFloat32( floatx80ToCommonNaN( a ) );
- }
- return packFloat32( aSign, 0xFF, 0 );
- }
- shift64RightJamming( aSig, 33, &aSig );
- if ( aExp || aSig ) aExp -= 0x3F81;
- return roundAndPackFloat32( aSign, aExp, aSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the double-precision floating-point format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 floatx80_to_float64( floatx80 a )
-{
- flag aSign;
- int32 aExp;
- bits64 aSig, zSig;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 ) ) {
- return commonNaNToFloat64( floatx80ToCommonNaN( a ) );
- }
- return packFloat64( aSign, 0x7FF, 0 );
- }
- shift64RightJamming( aSig, 1, &zSig );
- if ( aExp || aSig ) aExp -= 0x3C01;
- return roundAndPackFloat64( aSign, aExp, zSig );
-
-}
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the extended double-precision floating-
-| point value `a' to the quadruple-precision floating-point format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 floatx80_to_float128( floatx80 a )
-{
- flag aSign;
- int16 aExp;
- bits64 aSig, zSig0, zSig1;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( ( aExp == 0x7FFF ) && (bits64) ( aSig<<1 ) ) {
- return commonNaNToFloat128( floatx80ToCommonNaN( a ) );
- }
- shift128Right( aSig<<1, 0, 16, &zSig0, &zSig1 );
- return packFloat128( aSign, aExp, zSig0, zSig1 );
-
-}
-
-#endif
-
-/*----------------------------------------------------------------------------
-| Rounds the extended double-precision floating-point value `a' to an integer,
-| and returns the result as an extended quadruple-precision floating-point
-| value. The operation is performed according to the IEC/IEEE Standard for
-| Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_round_to_int( floatx80 a )
-{
- flag aSign;
- int32 aExp;
- bits64 lastBitMask, roundBitsMask;
- int8 roundingMode;
- floatx80 z;
-
- aExp = extractFloatx80Exp( a );
- if ( 0x403E <= aExp ) {
- if ( ( aExp == 0x7FFF ) && (bits64) ( extractFloatx80Frac( a )<<1 ) ) {
- return propagateFloatx80NaN( a, a );
- }
- return a;
- }
- if ( aExp < 0x3FFF ) {
- if ( ( aExp == 0 )
- && ( (bits64) ( extractFloatx80Frac( a )<<1 ) == 0 ) ) {
- return a;
- }
- float_exception_flags |= float_flag_inexact;
- aSign = extractFloatx80Sign( a );
- switch ( float_rounding_mode ) {
- case float_round_nearest_even:
- if ( ( aExp == 0x3FFE ) && (bits64) ( extractFloatx80Frac( a )<<1 )
- ) {
- return
- packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
- }
- break;
- case float_round_down:
- return
- aSign ?
- packFloatx80( 1, 0x3FFF, LIT64( 0x8000000000000000 ) )
- : packFloatx80( 0, 0, 0 );
- case float_round_up:
- return
- aSign ? packFloatx80( 1, 0, 0 )
- : packFloatx80( 0, 0x3FFF, LIT64( 0x8000000000000000 ) );
- }
- return packFloatx80( aSign, 0, 0 );
- }
- lastBitMask = 1;
- lastBitMask <<= 0x403E - aExp;
- roundBitsMask = lastBitMask - 1;
- z = a;
- roundingMode = float_rounding_mode;
- if ( roundingMode == float_round_nearest_even ) {
- z.low += lastBitMask>>1;
- if ( ( z.low & roundBitsMask ) == 0 ) z.low &= ~ lastBitMask;
- }
- else if ( roundingMode != float_round_to_zero ) {
- if ( extractFloatx80Sign( z ) ^ ( roundingMode == float_round_up ) ) {
- z.low += roundBitsMask;
- }
- }
- z.low &= ~ roundBitsMask;
- if ( z.low == 0 ) {
- ++z.high;
- z.low = LIT64( 0x8000000000000000 );
- }
- if ( z.low != a.low ) float_exception_flags |= float_flag_inexact;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the absolute values of the extended double-
-| precision floating-point values `a' and `b'. If `zSign' is 1, the sum is
-| negated before being returned. `zSign' is ignored if the result is a NaN.
-| The addition is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static floatx80 addFloatx80Sigs( floatx80 a, floatx80 b, flag zSign )
-{
- int32 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig0, zSig1;
- int32 expDiff;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- bSig = extractFloatx80Frac( b );
- bExp = extractFloatx80Exp( b );
- expDiff = aExp - bExp;
- if ( 0 < expDiff ) {
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) --expDiff;
- shift64ExtraRightJamming( bSig, 0, expDiff, &bSig, &zSig1 );
- zExp = aExp;
- }
- else if ( expDiff < 0 ) {
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) ++expDiff;
- shift64ExtraRightJamming( aSig, 0, - expDiff, &aSig, &zSig1 );
- zExp = bExp;
- }
- else {
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( ( aSig | bSig )<<1 ) ) {
- return propagateFloatx80NaN( a, b );
- }
- return a;
- }
- zSig1 = 0;
- zSig0 = aSig + bSig;
- if ( aExp == 0 ) {
- normalizeFloatx80Subnormal( zSig0, &zExp, &zSig0 );
- goto roundAndPack;
- }
- zExp = aExp;
- goto shiftRight1;
- }
- zSig0 = aSig + bSig;
- if ( (sbits64) zSig0 < 0 ) goto roundAndPack;
- shiftRight1:
- shift64ExtraRightJamming( zSig0, zSig1, 1, &zSig0, &zSig1 );
- zSig0 |= LIT64( 0x8000000000000000 );
- ++zExp;
- roundAndPack:
- return
- roundAndPackFloatx80(
- floatx80_rounding_precision, zSign, zExp, zSig0, zSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the absolute values of the extended
-| double-precision floating-point values `a' and `b'. If `zSign' is 1, the
-| difference is negated before being returned. `zSign' is ignored if the
-| result is a NaN. The subtraction is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-static floatx80 subFloatx80Sigs( floatx80 a, floatx80 b, flag zSign )
-{
- int32 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig0, zSig1;
- int32 expDiff;
- floatx80 z;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- bSig = extractFloatx80Frac( b );
- bExp = extractFloatx80Exp( b );
- expDiff = aExp - bExp;
- if ( 0 < expDiff ) goto aExpBigger;
- if ( expDiff < 0 ) goto bExpBigger;
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( ( aSig | bSig )<<1 ) ) {
- return propagateFloatx80NaN( a, b );
- }
- float_raise( float_flag_invalid );
- z.low = floatx80_default_nan_low;
- z.high = floatx80_default_nan_high;
- return z;
- }
- if ( aExp == 0 ) {
- aExp = 1;
- bExp = 1;
- }
- zSig1 = 0;
- if ( bSig < aSig ) goto aBigger;
- if ( aSig < bSig ) goto bBigger;
- return packFloatx80( float_rounding_mode == float_round_down, 0, 0 );
- bExpBigger:
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return packFloatx80( zSign ^ 1, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) ++expDiff;
- shift128RightJamming( aSig, 0, - expDiff, &aSig, &zSig1 );
- bBigger:
- sub128( bSig, 0, aSig, zSig1, &zSig0, &zSig1 );
- zExp = bExp;
- zSign ^= 1;
- goto normalizeRoundAndPack;
- aExpBigger:
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) --expDiff;
- shift128RightJamming( bSig, 0, expDiff, &bSig, &zSig1 );
- aBigger:
- sub128( aSig, 0, bSig, zSig1, &zSig0, &zSig1 );
- zExp = aExp;
- normalizeRoundAndPack:
- return
- normalizeRoundAndPackFloatx80(
- floatx80_rounding_precision, zSign, zExp, zSig0, zSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the extended double-precision floating-point
-| values `a' and `b'. The operation is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_add( floatx80 a, floatx80 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign == bSign ) {
- return addFloatx80Sigs( a, b, aSign );
- }
- else {
- return subFloatx80Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of subtracting the extended double-precision floating-
-| point values `a' and `b'. The operation is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_sub( floatx80 a, floatx80 b )
-{
- flag aSign, bSign;
-
- aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign == bSign ) {
- return subFloatx80Sigs( a, b, aSign );
- }
- else {
- return addFloatx80Sigs( a, b, aSign );
- }
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of multiplying the extended double-precision floating-
-| point values `a' and `b'. The operation is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_mul( floatx80 a, floatx80 b )
-{
- flag aSign, bSign, zSign;
- int32 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig0, zSig1;
- floatx80 z;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- bSig = extractFloatx80Frac( b );
- bExp = extractFloatx80Exp( b );
- bSign = extractFloatx80Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 )
- || ( ( bExp == 0x7FFF ) && (bits64) ( bSig<<1 ) ) ) {
- return propagateFloatx80NaN( a, b );
- }
- if ( ( bExp | bSig ) == 0 ) goto invalid;
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- if ( ( aExp | aSig ) == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = floatx80_default_nan_low;
- z.high = floatx80_default_nan_high;
- return z;
- }
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
- normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) return packFloatx80( zSign, 0, 0 );
- normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
- }
- zExp = aExp + bExp - 0x3FFE;
- mul64To128( aSig, bSig, &zSig0, &zSig1 );
- if ( 0 < (sbits64) zSig0 ) {
- shortShift128Left( zSig0, zSig1, 1, &zSig0, &zSig1 );
- --zExp;
- }
- return
- roundAndPackFloatx80(
- floatx80_rounding_precision, zSign, zExp, zSig0, zSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of dividing the extended double-precision floating-point
-| value `a' by the corresponding value `b'. The operation is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_div( floatx80 a, floatx80 b )
-{
- flag aSign, bSign, zSign;
- int32 aExp, bExp, zExp;
- bits64 aSig, bSig, zSig0, zSig1;
- bits64 rem0, rem1, rem2, term0, term1, term2;
- floatx80 z;
-
- aSig = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- bSig = extractFloatx80Frac( b );
- bExp = extractFloatx80Exp( b );
- bSign = extractFloatx80Sign( b );
- zSign = aSign ^ bSign;
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig<<1 ) ) return propagateFloatx80NaN( a, b );
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- goto invalid;
- }
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return packFloatx80( zSign, 0, 0 );
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- if ( ( aExp | aSig ) == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = floatx80_default_nan_low;
- z.high = floatx80_default_nan_high;
- return z;
- }
- float_raise( float_flag_divbyzero );
- return packFloatx80( zSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
- normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
- }
- zExp = aExp - bExp + 0x3FFE;
- rem1 = 0;
- if ( bSig <= aSig ) {
- shift128Right( aSig, 0, 1, &aSig, &rem1 );
- ++zExp;
- }
- zSig0 = estimateDiv128To64( aSig, rem1, bSig );
- mul64To128( bSig, zSig0, &term0, &term1 );
- sub128( aSig, rem1, term0, term1, &rem0, &rem1 );
- while ( (sbits64) rem0 < 0 ) {
- --zSig0;
- add128( rem0, rem1, 0, bSig, &rem0, &rem1 );
- }
- zSig1 = estimateDiv128To64( rem1, 0, bSig );
- if ( (bits64) ( zSig1<<1 ) <= 8 ) {
- mul64To128( bSig, zSig1, &term1, &term2 );
- sub128( rem1, 0, term1, term2, &rem1, &rem2 );
- while ( (sbits64) rem1 < 0 ) {
- --zSig1;
- add128( rem1, rem2, 0, bSig, &rem1, &rem2 );
- }
- zSig1 |= ( ( rem1 | rem2 ) != 0 );
- }
- return
- roundAndPackFloatx80(
- floatx80_rounding_precision, zSign, zExp, zSig0, zSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the remainder of the extended double-precision floating-point value
-| `a' with respect to the corresponding value `b'. The operation is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_rem( floatx80 a, floatx80 b )
-{
- flag aSign, zSign;
- int32 aExp, bExp, expDiff;
- bits64 aSig0, aSig1, bSig;
- bits64 q, term0, term1, alternateASig0, alternateASig1;
- floatx80 z;
-
- aSig0 = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- bSig = extractFloatx80Frac( b );
- bExp = extractFloatx80Exp( b );
-// bSign = extractFloatx80Sign( b );
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig0<<1 )
- || ( ( bExp == 0x7FFF ) && (bits64) ( bSig<<1 ) ) ) {
- return propagateFloatx80NaN( a, b );
- }
- goto invalid;
- }
- if ( bExp == 0x7FFF ) {
- if ( (bits64) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- if ( bSig == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = floatx80_default_nan_low;
- z.high = floatx80_default_nan_high;
- return z;
- }
- normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
- }
- if ( aExp == 0 ) {
- if ( (bits64) ( aSig0<<1 ) == 0 ) return a;
- normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
- }
- bSig |= LIT64( 0x8000000000000000 );
- zSign = aSign;
- expDiff = aExp - bExp;
- aSig1 = 0;
- if ( expDiff < 0 ) {
- if ( expDiff < -1 ) return a;
- shift128Right( aSig0, 0, 1, &aSig0, &aSig1 );
- expDiff = 0;
- }
- q = ( bSig <= aSig0 );
- if ( q ) aSig0 -= bSig;
- expDiff -= 64;
- while ( 0 < expDiff ) {
- q = estimateDiv128To64( aSig0, aSig1, bSig );
- q = ( 2 < q ) ? q - 2 : 0;
- mul64To128( bSig, q, &term0, &term1 );
- sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
- shortShift128Left( aSig0, aSig1, 62, &aSig0, &aSig1 );
- expDiff -= 62;
- }
- expDiff += 64;
- if ( 0 < expDiff ) {
- q = estimateDiv128To64( aSig0, aSig1, bSig );
- q = ( 2 < q ) ? q - 2 : 0;
- q >>= 64 - expDiff;
- mul64To128( bSig, q<<( 64 - expDiff ), &term0, &term1 );
- sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
- shortShift128Left( 0, bSig, 64 - expDiff, &term0, &term1 );
- while ( le128( term0, term1, aSig0, aSig1 ) ) {
- ++q;
- sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
- }
- }
- else {
- term1 = 0;
- term0 = bSig;
- }
- sub128( term0, term1, aSig0, aSig1, &alternateASig0, &alternateASig1 );
- if ( lt128( alternateASig0, alternateASig1, aSig0, aSig1 )
- || ( eq128( alternateASig0, alternateASig1, aSig0, aSig1 )
- && ( q & 1 ) )
- ) {
- aSig0 = alternateASig0;
- aSig1 = alternateASig1;
- zSign = ! zSign;
- }
- return
- normalizeRoundAndPackFloatx80(
- 80, zSign, bExp + expDiff, aSig0, aSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the square root of the extended double-precision floating-point
-| value `a'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_sqrt( floatx80 a )
-{
- flag aSign;
- int32 aExp, zExp;
- bits64 aSig0, aSig1, zSig0, zSig1, doubleZSig0;
- bits64 rem0, rem1, rem2, rem3, term0, term1, term2, term3;
- floatx80 z;
-
- aSig0 = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( (bits64) ( aSig0<<1 ) ) return propagateFloatx80NaN( a, a );
- if ( ! aSign ) return a;
- goto invalid;
- }
- if ( aSign ) {
- if ( ( aExp | aSig0 ) == 0 ) return a;
- invalid:
- float_raise( float_flag_invalid );
- z.low = floatx80_default_nan_low;
- z.high = floatx80_default_nan_high;
- return z;
- }
- if ( aExp == 0 ) {
- if ( aSig0 == 0 ) return packFloatx80( 0, 0, 0 );
- normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
- }
- zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFF;
- zSig0 = estimateSqrt32( aExp, aSig0>>32 );
- shift128Right( aSig0, 0, 2 + ( aExp & 1 ), &aSig0, &aSig1 );
- zSig0 = estimateDiv128To64( aSig0, aSig1, zSig0<<32 ) + ( zSig0<<30 );
- doubleZSig0 = zSig0<<1;
- mul64To128( zSig0, zSig0, &term0, &term1 );
- sub128( aSig0, aSig1, term0, term1, &rem0, &rem1 );
- while ( (sbits64) rem0 < 0 ) {
- --zSig0;
- doubleZSig0 -= 2;
- add128( rem0, rem1, zSig0>>63, doubleZSig0 | 1, &rem0, &rem1 );
- }
- zSig1 = estimateDiv128To64( rem1, 0, doubleZSig0 );
- if ( ( zSig1 & LIT64( 0x3FFFFFFFFFFFFFFF ) ) <= 5 ) {
- if ( zSig1 == 0 ) zSig1 = 1;
- mul64To128( doubleZSig0, zSig1, &term1, &term2 );
- sub128( rem1, 0, term1, term2, &rem1, &rem2 );
- mul64To128( zSig1, zSig1, &term2, &term3 );
- sub192( rem1, rem2, 0, 0, term2, term3, &rem1, &rem2, &rem3 );
- while ( (sbits64) rem1 < 0 ) {
- --zSig1;
- shortShift128Left( 0, zSig1, 1, &term2, &term3 );
- term3 |= 1;
- term2 |= doubleZSig0;
- add192( rem1, rem2, rem3, 0, term2, term3, &rem1, &rem2, &rem3 );
- }
- zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 );
- }
- shortShift128Left( 0, zSig1, 1, &zSig0, &zSig1 );
- zSig0 |= doubleZSig0;
- return
- roundAndPackFloatx80(
- floatx80_rounding_precision, 0, zExp, zSig0, zSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is
-| equal to the corresponding value `b', and 0 otherwise. The comparison is
-| performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag floatx80_eq( floatx80 a, floatx80 b )
-{
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- if ( floatx80_is_signaling_nan( a )
- || floatx80_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- return
- ( a.low == b.low )
- && ( ( a.high == b.high )
- || ( ( a.low == 0 )
- && ( (bits16) ( ( a.high | b.high )<<1 ) == 0 ) )
- );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is
-| less than or equal to the corresponding value `b', and 0 otherwise. The
-| comparison is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag floatx80_le( floatx80 a, floatx80 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- || ( ( ( (bits16) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- == 0 );
- }
- return
- aSign ? le128( b.high, b.low, a.high, a.low )
- : le128( a.high, a.low, b.high, b.low );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is
-| less than the corresponding value `b', and 0 otherwise. The comparison
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag floatx80_lt( floatx80 a, floatx80 b )
+#ifdef SOFTFLOAT_68K // 30-01-2016: Added for Previous
+floatx80 floatx80_round32( floatx80 a, float_status *status )
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF || aSig == 0 ) {
+ return a;
+ }
+ if ( aExp == 0 ) {
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundSigAndPackFloatx80( 32, aSign, aExp, aSig, 0, status );
+}
+
+floatx80 floatx80_round64( floatx80 a, float_status *status )
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF || aSig == 0 ) {
+ return a;
+ }
+ if ( aExp == 0 ) {
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundSigAndPackFloatx80( 64, aSign, aExp, aSig, 0, status );
+}
+
+floatx80 floatx80_round_to_float32( floatx80 a, float_status *status )
{
- flag aSign, bSign;
-
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- && ( ( ( (bits16) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- != 0 );
- }
- return
- aSign ? lt128( b.high, b.low, a.high, a.low )
- : lt128( a.high, a.low, b.high, b.low );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is equal
-| to the corresponding value `b', and 0 otherwise. The invalid exception is
-| raised if either operand is a NaN. Otherwise, the comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag floatx80_eq_signaling( floatx80 a, floatx80 b )
-{
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- return
- ( a.low == b.low )
- && ( ( a.high == b.high )
- || ( ( a.low == 0 )
- && ( (bits16) ( ( a.high | b.high )<<1 ) == 0 ) )
- );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is less
-| than or equal to the corresponding value `b', and 0 otherwise. Quiet NaNs
-| do not cause an exception. Otherwise, the comparison is performed according
-| to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag floatx80_le_quiet( floatx80 a, floatx80 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- if ( floatx80_is_signaling_nan( a )
- || floatx80_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaNOneArg( a, status );
+ return a;
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return a;
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundAndPackFloatx80( 32, aSign, aExp, aSig, 0, status );
+}
+
+floatx80 floatx80_round_to_float64( floatx80 a, float_status *status )
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- || ( ( ( (bits16) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- == 0 );
- }
- return
- aSign ? le128( b.high, b.low, a.high, a.low )
- : le128( a.high, a.low, b.high, b.low );
-
-}
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaNOneArg( a, status );
+ return a;
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return a;
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundAndPackFloatx80( 64, aSign, aExp, aSig, 0, status );
+}
+
+
+floatx80 floatx80_normalize( floatx80 a )
+{
+ flag aSign;
+ int16_t aExp;
+ uint64_t aSig;
+ int8_t shiftCount;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF || aExp == 0 ) return a;
+ if ( aSig == 0 ) return packFloatx80(aSign, 0, 0);
+
+ shiftCount = countLeadingZeros64( aSig );
+
+ if ( shiftCount > aExp ) shiftCount = aExp;
+
+ aExp -= shiftCount;
+ aSig <<= shiftCount;
+
+ return packFloatx80( aSign, aExp, aSig );
+}
+#endif // end of addition for Previous
/*----------------------------------------------------------------------------
-| Returns 1 if the extended double-precision floating-point value `a' is less
-| than the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause
-| an exception. Otherwise, the comparison is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Rounds the extended double-precision floating-point value `a' to an integer,
+| and returns the result as an extended quadruple-precision floating-point
+| value. The operation is performed according to the IEC/IEEE Standard for
+| Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-flag floatx80_lt_quiet( floatx80 a, floatx80 b )
+floatx80 floatx80_round_to_int(floatx80 a, float_status *status)
{
- flag aSign, bSign;
-
- if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( a )<<1 ) )
- || ( ( extractFloatx80Exp( b ) == 0x7FFF )
- && (bits64) ( extractFloatx80Frac( b )<<1 ) )
- ) {
- if ( floatx80_is_signaling_nan( a )
- || floatx80_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloatx80Sign( a );
- bSign = extractFloatx80Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- && ( ( ( (bits16) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- != 0 );
- }
- return
- aSign ? lt128( b.high, b.low, a.high, a.low )
- : lt128( a.high, a.low, b.high, b.low );
-
-}
+ flag aSign;
+ int32_t aExp;
+ uint64_t lastBitMask, roundBitsMask;
+// int8_t roundingMode;
+ floatx80 z;
+// roundingMode = status->float_rounding_mode;
+ aSign = extractFloatx80Sign(a);
+ aExp = extractFloatx80Exp( a );
+ if ( 0x403E <= aExp ) {
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t) ( extractFloatx80Frac( a )<<1 ) )
+ return propagateFloatx80NaNOneArg(a, status);
+ return inf_clear_intbit(status) ? packFloatx80(aSign, aExp, 0) : a;
+ }
+ return a;
+ }
+ if ( aExp < 0x3FFF ) {
+ if ( ( aExp == 0 )
+ #ifdef SOFTFLOAT_68K
+ && ( (uint64_t) extractFloatx80Frac( a ) == 0 ) ) {
+#else
+ && ( (uint64_t) ( extractFloatx80Frac( a )<<1 ) == 0 ) ) {
#endif
-
-#ifdef FLOAT128
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the 32-bit two's complement integer format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int32 float128_to_int32( float128 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig0, aSig1;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( ( aExp == 0x7FFF ) && ( aSig0 | aSig1 ) ) aSign = 0;
- if ( aExp ) aSig0 |= LIT64( 0x0001000000000000 );
- aSig0 |= ( aSig1 != 0 );
- shiftCount = 0x4028 - aExp;
- if ( 0 < shiftCount ) shift64RightJamming( aSig0, shiftCount, &aSig0 );
- return roundAndPackInt32( aSign, aSig0 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the 32-bit two's complement integer format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero. If
-| `a' is a NaN, the largest positive integer is returned. Otherwise, if the
-| conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int32 float128_to_int32_round_to_zero( float128 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig0, aSig1, savedASig;
- int32 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- aSig0 |= ( aSig1 != 0 );
- if ( 0x401E < aExp ) {
- if ( ( aExp == 0x7FFF ) && aSig0 ) aSign = 0;
- goto invalid;
- }
- else if ( aExp < 0x3FFF ) {
- if ( aExp || aSig0 ) float_exception_flags |= float_flag_inexact;
- return 0;
- }
- aSig0 |= LIT64( 0x0001000000000000 );
- shiftCount = 0x402F - aExp;
- savedASig = aSig0;
- aSig0 >>= shiftCount;
- z = aSig0;
- if ( aSign ) z = - z;
- if ( ( z < 0 ) ^ aSign ) {
- invalid:
- float_raise( float_flag_invalid );
- return aSign ? (sbits32) 0x80000000 : 0x7FFFFFFF;
- }
- if ( ( aSig0<<shiftCount ) != savedASig ) {
- float_exception_flags |= float_flag_inexact;
- }
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the 64-bit two's complement integer format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic---which means in particular that the conversion is rounded
-| according to the current rounding mode. If `a' is a NaN, the largest
-| positive integer is returned. Otherwise, if the conversion overflows, the
-| largest integer with the same sign as `a' is returned.
-*----------------------------------------------------------------------------*/
-
-int64 float128_to_int64( float128 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig0, aSig1;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp ) aSig0 |= LIT64( 0x0001000000000000 );
- shiftCount = 0x402F - aExp;
- if ( shiftCount <= 0 ) {
- if ( 0x403E < aExp ) {
- float_raise( float_flag_invalid );
- if ( ! aSign
- || ( ( aExp == 0x7FFF )
- && ( aSig1 || ( aSig0 != LIT64( 0x0001000000000000 ) ) )
- )
- ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- shortShift128Left( aSig0, aSig1, - shiftCount, &aSig0, &aSig1 );
- }
- else {
- shift64ExtraRightJamming( aSig0, aSig1, shiftCount, &aSig0, &aSig1 );
- }
- return roundAndPackInt64( aSign, aSig0, aSig1 );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the 64-bit two's complement integer format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic, except that the conversion is always rounded toward zero.
-| If `a' is a NaN, the largest positive integer is returned. Otherwise, if
-| the conversion overflows, the largest integer with the same sign as `a' is
-| returned.
-*----------------------------------------------------------------------------*/
-
-int64 float128_to_int64_round_to_zero( float128 a )
-{
- flag aSign;
- int32 aExp, shiftCount;
- bits64 aSig0, aSig1;
- int64 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp ) aSig0 |= LIT64( 0x0001000000000000 );
- shiftCount = aExp - 0x402F;
- if ( 0 < shiftCount ) {
- if ( 0x403E <= aExp ) {
- aSig0 &= LIT64( 0x0000FFFFFFFFFFFF );
- if ( ( a.high == LIT64( 0xC03E000000000000 ) )
- && ( aSig1 < LIT64( 0x0002000000000000 ) ) ) {
- if ( aSig1 ) float_exception_flags |= float_flag_inexact;
- }
- else {
- float_raise( float_flag_invalid );
- if ( ! aSign || ( ( aExp == 0x7FFF ) && ( aSig0 | aSig1 ) ) ) {
- return LIT64( 0x7FFFFFFFFFFFFFFF );
- }
- }
- return (sbits64) LIT64( 0x8000000000000000 );
- }
- z = ( aSig0<<shiftCount ) | ( aSig1>>( ( - shiftCount ) & 63 ) );
- if ( (bits64) ( aSig1<<shiftCount ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- }
- else {
- if ( aExp < 0x3FFF ) {
- if ( aExp | aSig0 | aSig1 ) {
- float_exception_flags |= float_flag_inexact;
- }
- return 0;
- }
- z = aSig0>>( - shiftCount );
- if ( aSig1
- || ( shiftCount && (bits64) ( aSig0<<( shiftCount & 63 ) ) ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- }
- if ( aSign ) z = - z;
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the single-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float128_to_float32( float128 a )
-{
- flag aSign;
- int32 aExp;
- bits64 aSig0, aSig1;
- bits32 zSig;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) {
- return commonNaNToFloat32( float128ToCommonNaN( a ) );
- }
- return packFloat32( aSign, 0xFF, 0 );
- }
- aSig0 |= ( aSig1 != 0 );
- shift64RightJamming( aSig0, 18, &aSig0 );
- zSig = aSig0;
- if ( aExp || zSig ) {
- zSig |= 0x40000000;
- aExp -= 0x3F81;
- }
- return roundAndPackFloat32( aSign, aExp, zSig );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the double-precision floating-point format. The conversion
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float128_to_float64( float128 a )
-{
- flag aSign;
- int32 aExp;
- bits64 aSig0, aSig1;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) {
- return commonNaNToFloat64( float128ToCommonNaN( a ) );
- }
- return packFloat64( aSign, 0x7FF, 0 );
- }
- shortShift128Left( aSig0, aSig1, 14, &aSig0, &aSig1 );
- aSig0 |= ( aSig1 != 0 );
- if ( aExp || aSig0 ) {
- aSig0 |= LIT64( 0x4000000000000000 );
- aExp -= 0x3C01;
- }
- return roundAndPackFloat64( aSign, aExp, aSig0 );
-
-}
-
-#ifdef FLOATX80
-
-/*----------------------------------------------------------------------------
-| Returns the result of converting the quadruple-precision floating-point
-| value `a' to the extended double-precision floating-point format. The
-| conversion is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 float128_to_floatx80( float128 a )
-{
- flag aSign;
- int32 aExp;
- bits64 aSig0, aSig1;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) {
- return commonNaNToFloatx80( float128ToCommonNaN( a ) );
- }
- return packFloatx80( aSign, 0x7FFF, LIT64( 0x8000000000000000 ) );
- }
- if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return packFloatx80( aSign, 0, 0 );
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
- }
- else {
- aSig0 |= LIT64( 0x0001000000000000 );
- }
- shortShift128Left( aSig0, aSig1, 15, &aSig0, &aSig1 );
- return roundAndPackFloatx80( 80, aSign, aExp, aSig0, aSig1 );
-
-}
-
+ return a;
+ }
+ status->float_exception_flags |= float_flag_inexact;
+ switch (status->float_rounding_mode) {
+ case float_round_nearest_even:
+ if ( ( aExp == 0x3FFE ) && (uint64_t) ( extractFloatx80Frac( a )<<1 )
+ ) {
+ return
+ packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
+ }
+ break;
+ case float_round_ties_away:
+ if (aExp == 0x3FFE) {
+ return packFloatx80(aSign, 0x3FFF, LIT64(0x8000000000000000));
+ }
+ break;
+ case float_round_down:
+ return
+ aSign ?
+ packFloatx80( 1, 0x3FFF, LIT64( 0x8000000000000000 ) )
+ : packFloatx80( 0, 0, 0 );
+ case float_round_up:
+ return
+ aSign ? packFloatx80( 1, 0, 0 )
+ : packFloatx80( 0, 0x3FFF, LIT64( 0x8000000000000000 ) );
+ }
+ return packFloatx80( aSign, 0, 0 );
+ }
+ lastBitMask = 1;
+ lastBitMask <<= 0x403E - aExp;
+ roundBitsMask = lastBitMask - 1;
+ z = a;
+ switch (status->float_rounding_mode) {
+ case float_round_nearest_even:
+ z.low += lastBitMask>>1;
+ if ((z.low & roundBitsMask) == 0) {
+ z.low &= ~lastBitMask;
+ }
+ break;
+ case float_round_ties_away:
+ z.low += lastBitMask >> 1;
+ break;
+ case float_round_to_zero:
+ break;
+ case float_round_up:
+ if (!extractFloatx80Sign(z)) {
+ z.low += roundBitsMask;
+ }
+ break;
+ case float_round_down:
+ if (extractFloatx80Sign(z)) {
+ z.low += roundBitsMask;
+ }
+ break;
+ default:
+ abort();
+ }
+ z.low &= ~ roundBitsMask;
+ if ( z.low == 0 ) {
+ ++z.high;
+ z.low = LIT64( 0x8000000000000000 );
+ }
+ if (z.low != a.low) {
+ status->float_exception_flags |= float_flag_inexact;
+ }
+ return z;
+
+}
+
+#ifdef SOFTFLOAT_68K // 09-01-2017: Added for Previous
+floatx80 floatx80_round_to_int_toward_zero( floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t lastBitMask, roundBitsMask;
+ floatx80 z;
+
+ aSign = extractFloatx80Sign(a);
+ aExp = extractFloatx80Exp( a );
+ if ( 0x403E <= aExp ) {
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( extractFloatx80Frac( a )<<1 ) )
+ return propagateFloatx80NaNOneArg( a, status );
+ return inf_clear_intbit(status) ? packFloatx80(aSign, aExp, 0) : a;
+ }
+ return a;
+ }
+ if ( aExp < 0x3FFF ) {
+ if ( ( aExp == 0 )
+#ifdef SOFTFLOAT_68K
+ && ( (uint64_t) extractFloatx80Frac( a ) == 0 ) ) {
+#else
+ && ( (uint64_t) ( extractFloatx80Frac( a )<<1 ) == 0 ) ) {
#endif
+ return a;
+ }
+ status->float_exception_flags |= float_flag_inexact;
+ return packFloatx80( aSign, 0, 0 );
+ }
+ lastBitMask = 1;
+ lastBitMask <<= 0x403E - aExp;
+ roundBitsMask = lastBitMask - 1;
+ z = a;
+ z.low &= ~ roundBitsMask;
+ if ( z.low == 0 ) {
+ ++z.high;
+ z.low = LIT64( 0x8000000000000000 );
+ }
+ if ( z.low != a.low ) status->float_exception_flags |= float_flag_inexact;
+ return z;
+
+}
+#endif // End of addition for Previous
/*----------------------------------------------------------------------------
-| Rounds the quadruple-precision floating-point value `a' to an integer, and
-| returns the result as a quadruple-precision floating-point value. The
-| operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 float128_round_to_int( float128 a )
-{
- flag aSign;
- int32 aExp;
- bits64 lastBitMask, roundBitsMask;
- int8 roundingMode;
- float128 z;
-
- aExp = extractFloat128Exp( a );
- if ( 0x402F <= aExp ) {
- if ( 0x406F <= aExp ) {
- if ( ( aExp == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) )
- ) {
- return propagateFloat128NaN( a, a );
- }
- return a;
- }
- lastBitMask = 1;
- lastBitMask = ( lastBitMask<<( 0x406E - aExp ) )<<1;
- roundBitsMask = lastBitMask - 1;
- z = a;
- roundingMode = float_rounding_mode;
- if ( roundingMode == float_round_nearest_even ) {
- if ( lastBitMask ) {
- add128( z.high, z.low, 0, lastBitMask>>1, &z.high, &z.low );
- if ( ( z.low & roundBitsMask ) == 0 ) z.low &= ~ lastBitMask;
- }
- else {
- if ( (sbits64) z.low < 0 ) {
- ++z.high;
- if ( (bits64) ( z.low<<1 ) == 0 ) z.high &= ~1;
- }
- }
- }
- else if ( roundingMode != float_round_to_zero ) {
- if ( extractFloat128Sign( z )
- ^ ( roundingMode == float_round_up ) ) {
- add128( z.high, z.low, 0, roundBitsMask, &z.high, &z.low );
- }
- }
- z.low &= ~ roundBitsMask;
- }
- else {
- if ( aExp < 0x3FFF ) {
- if ( ( ( (bits64) ( a.high<<1 ) ) | a.low ) == 0 ) return a;
- float_exception_flags |= float_flag_inexact;
- aSign = extractFloat128Sign( a );
- switch ( float_rounding_mode ) {
- case float_round_nearest_even:
- if ( ( aExp == 0x3FFE )
- && ( extractFloat128Frac0( a )
- | extractFloat128Frac1( a ) )
- ) {
- return packFloat128( aSign, 0x3FFF, 0, 0 );
- }
- break;
- case float_round_down:
- return
- aSign ? packFloat128( 1, 0x3FFF, 0, 0 )
- : packFloat128( 0, 0, 0, 0 );
- case float_round_up:
- return
- aSign ? packFloat128( 1, 0, 0, 0 )
- : packFloat128( 0, 0x3FFF, 0, 0 );
- }
- return packFloat128( aSign, 0, 0, 0 );
- }
- lastBitMask = 1;
- lastBitMask <<= 0x402F - aExp;
- roundBitsMask = lastBitMask - 1;
- z.low = 0;
- z.high = a.high;
- roundingMode = float_rounding_mode;
- if ( roundingMode == float_round_nearest_even ) {
- z.high += lastBitMask>>1;
- if ( ( ( z.high & roundBitsMask ) | a.low ) == 0 ) {
- z.high &= ~ lastBitMask;
- }
- }
- else if ( roundingMode != float_round_to_zero ) {
- if ( extractFloat128Sign( z )
- ^ ( roundingMode == float_round_up ) ) {
- z.high |= ( a.low != 0 );
- z.high += roundBitsMask;
- }
- }
- z.high &= ~ roundBitsMask;
- }
- if ( ( z.low != a.low ) || ( z.high != a.high ) ) {
- float_exception_flags |= float_flag_inexact;
- }
- return z;
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns the result of adding the absolute values of the quadruple-precision
-| floating-point values `a' and `b'. If `zSign' is 1, the sum is negated
-| before being returned. `zSign' is ignored if the result is a NaN.
+| Returns the result of adding the absolute values of the extended double-
+| precision floating-point values `a' and `b'. If `zSign' is 1, the sum is
+| negated before being returned. `zSign' is ignored if the result is a NaN.
| The addition is performed according to the IEC/IEEE Standard for Binary
| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-static float128 addFloat128Sigs( float128 a, float128 b, flag zSign )
+static floatx80 addFloatx80Sigs(floatx80 a, floatx80 b, flag zSign,
+ float_status *status)
{
- int32 aExp, bExp, zExp;
- bits64 aSig0, aSig1, bSig0, bSig1, zSig0, zSig1, zSig2;
- int32 expDiff;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- bSig1 = extractFloat128Frac1( b );
- bSig0 = extractFloat128Frac0( b );
- bExp = extractFloat128Exp( b );
- expDiff = aExp - bExp;
- if ( 0 < expDiff ) {
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) return propagateFloat128NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig0 |= LIT64( 0x0001000000000000 );
- }
- shift128ExtraRightJamming(
- bSig0, bSig1, 0, expDiff, &bSig0, &bSig1, &zSig2 );
- zExp = aExp;
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+ int32_t expDiff;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+#ifdef SOFTFLOAT_68K
+ if ( aExp == 0 ) {
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
}
- else if ( expDiff < 0 ) {
- if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
- return packFloat128( zSign, 0x7FFF, 0, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig0 |= LIT64( 0x0001000000000000 );
- }
- shift128ExtraRightJamming(
- aSig0, aSig1, 0, - expDiff, &aSig0, &aSig1, &zSig2 );
- zExp = bExp;
+ if ( bExp == 0 ) {
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
}
- else {
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 | bSig0 | bSig1 ) {
- return propagateFloat128NaN( a, b );
- }
- return a;
+#endif
+ expDiff = aExp - bExp;
+ if ( 0 < expDiff ) {
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t)(aSig << 1))
+ return propagateFloatx80NaN(a, b, status);
+ return inf_clear_intbit(status) ? packFloatx80(extractFloatx80Sign(a), aExp, 0) : a;
+ }
+#ifndef SOFTFLOAT_68K
+ if ( bExp == 0 ) --expDiff;
+#endif
+ shift64ExtraRightJamming( bSig, 0, expDiff, &bSig, &zSig1 );
+ zExp = aExp;
+ }
+ else if ( expDiff < 0 ) {
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1))
+ return propagateFloatx80NaN(a, b, status);
+ if (inf_clear_intbit(status)) bSig = 0;
+ return packFloatx80( zSign, bExp, bSig );
+ }
+#ifndef SOFTFLOAT_68K
+ if ( aExp == 0 ) ++expDiff;
+#endif
+ shift64ExtraRightJamming( aSig, 0, - expDiff, &aSig, &zSig1 );
+ zExp = bExp;
+ }
+ else {
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( ( aSig | bSig )<<1 ) ) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ if (inf_clear_intbit(status)) return packFloatx80(extractFloatx80Sign(a), aExp, 0);
+ return faddsub_swap_inf(status) ? b : a;
+ }
+ zSig1 = 0;
+ zSig0 = aSig + bSig;
+ #ifndef SOFTFLOAT_68K
+ if ( aExp == 0 ) {
+ normalizeFloatx80Subnormal( zSig0, &zExp, &zSig0 );
+ goto roundAndPack;
}
- add128( aSig0, aSig1, bSig0, bSig1, &zSig0, &zSig1 );
- if ( aExp == 0 ) return packFloat128( zSign, 0, zSig0, zSig1 );
- zSig2 = 0;
- zSig0 |= LIT64( 0x0002000000000000 );
- zExp = aExp;
+#endif
+ zExp = aExp;
+#ifdef SOFTFLOAT_68K
+ if ( aSig == 0 && bSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ if ( aSig == 0 || bSig == 0 ) goto roundAndPack;
+#endif
goto shiftRight1;
- }
- aSig0 |= LIT64( 0x0001000000000000 );
- add128( aSig0, aSig1, bSig0, bSig1, &zSig0, &zSig1 );
- --zExp;
- if ( zSig0 < LIT64( 0x0002000000000000 ) ) goto roundAndPack;
- ++zExp;
- shiftRight1:
- shift128ExtraRightJamming(
- zSig0, zSig1, zSig2, 1, &zSig0, &zSig1, &zSig2 );
- roundAndPack:
- return roundAndPackFloat128( zSign, zExp, zSig0, zSig1, zSig2 );
-
+ }
+ zSig0 = aSig + bSig;
+ if ( (int64_t) zSig0 < 0 ) goto roundAndPack;
+ shiftRight1:
+ shift64ExtraRightJamming( zSig0, zSig1, 1, &zSig0, &zSig1 );
+ zSig0 |= LIT64( 0x8000000000000000 );
+ ++zExp;
+ roundAndPack:
+ return roundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, zExp, zSig0, zSig1, status);
}
/*----------------------------------------------------------------------------
-| Returns the result of subtracting the absolute values of the quadruple-
-| precision floating-point values `a' and `b'. If `zSign' is 1, the
+| Returns the result of subtracting the absolute values of the extended
+| double-precision floating-point values `a' and `b'. If `zSign' is 1, the
| difference is negated before being returned. `zSign' is ignored if the
| result is a NaN. The subtraction is performed according to the IEC/IEEE
| Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-static float128 subFloat128Sigs( float128 a, float128 b, flag zSign )
-{
- int32 aExp, bExp, zExp;
- bits64 aSig0, aSig1, bSig0, bSig1, zSig0, zSig1;
- int32 expDiff;
- float128 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- bSig1 = extractFloat128Frac1( b );
- bSig0 = extractFloat128Frac0( b );
- bExp = extractFloat128Exp( b );
- expDiff = aExp - bExp;
- shortShift128Left( aSig0, aSig1, 14, &aSig0, &aSig1 );
- shortShift128Left( bSig0, bSig1, 14, &bSig0, &bSig1 );
- if ( 0 < expDiff ) goto aExpBigger;
- if ( expDiff < 0 ) goto bExpBigger;
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 | bSig0 | bSig1 ) {
- return propagateFloat128NaN( a, b );
- }
- float_raise( float_flag_invalid );
- z.low = float128_default_nan_low;
- z.high = float128_default_nan_high;
- return z;
- }
+static floatx80 subFloatx80Sigs(floatx80 a, floatx80 b, flag zSign,
+ float_status *status)
+{
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+ int32_t expDiff;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ expDiff = aExp - bExp;
+ if ( 0 < expDiff ) goto aExpBigger;
+ if ( expDiff < 0 ) goto bExpBigger;
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( ( aSig | bSig )<<1 ) ) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ #ifndef SOFTFLOAT_68K
if ( aExp == 0 ) {
aExp = 1;
bExp = 1;
}
- if ( bSig0 < aSig0 ) goto aBigger;
- if ( aSig0 < bSig0 ) goto bBigger;
- if ( bSig1 < aSig1 ) goto aBigger;
- if ( aSig1 < bSig1 ) goto bBigger;
- return packFloat128( float_rounding_mode == float_round_down, 0, 0, 0 );
- bExpBigger:
- if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
- return packFloat128( zSign ^ 1, 0x7FFF, 0, 0 );
- }
- if ( aExp == 0 ) {
- ++expDiff;
- }
- else {
- aSig0 |= LIT64( 0x4000000000000000 );
- }
- shift128RightJamming( aSig0, aSig1, - expDiff, &aSig0, &aSig1 );
- bSig0 |= LIT64( 0x4000000000000000 );
- bBigger:
- sub128( bSig0, bSig1, aSig0, aSig1, &zSig0, &zSig1 );
- zExp = bExp;
- zSign ^= 1;
- goto normalizeRoundAndPack;
- aExpBigger:
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) return propagateFloat128NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- --expDiff;
- }
- else {
- bSig0 |= LIT64( 0x4000000000000000 );
- }
- shift128RightJamming( bSig0, bSig1, expDiff, &bSig0, &bSig1 );
- aSig0 |= LIT64( 0x4000000000000000 );
- aBigger:
- sub128( aSig0, aSig1, bSig0, bSig1, &zSig0, &zSig1 );
- zExp = aExp;
- normalizeRoundAndPack:
- --zExp;
- return normalizeRoundAndPackFloat128( zSign, zExp - 14, zSig0, zSig1 );
-
+#endif
+ zSig1 = 0;
+ if ( bSig < aSig ) goto aBigger;
+ if ( aSig < bSig ) goto bBigger;
+ return packFloatx80(status->float_rounding_mode == float_round_down, 0, 0);
+ bExpBigger:
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1)) return propagateFloatx80NaN(a, b, status);
+ if (inf_clear_intbit(status)) bSig = 0;
+ return packFloatx80(zSign ^ 1, bExp, bSig);
+ }
+#ifndef SOFTFLOAT_68K
+ if ( aExp == 0 ) ++expDiff;
+#endif
+ shift128RightJamming( aSig, 0, - expDiff, &aSig, &zSig1 );
+ bBigger:
+ sub128( bSig, 0, aSig, zSig1, &zSig0, &zSig1 );
+ zExp = bExp;
+ zSign ^= 1;
+ goto normalizeRoundAndPack;
+ aExpBigger:
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t)(aSig << 1)) return propagateFloatx80NaN(a, b, status);
+ return inf_clear_intbit(status) ? packFloatx80(extractFloatx80Sign(a), aExp, 0) : a;
+ }
+#ifndef SOFTFLOAT_68K
+ if ( bExp == 0 ) --expDiff;
+#endif
+ shift128RightJamming( bSig, 0, expDiff, &bSig, &zSig1 );
+ aBigger:
+ sub128( aSig, 0, bSig, zSig1, &zSig0, &zSig1 );
+ zExp = aExp;
+ normalizeRoundAndPack:
+ return normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, zExp, zSig0, zSig1, status);
}
/*----------------------------------------------------------------------------
-| Returns the result of adding the quadruple-precision floating-point values
-| `a' and `b'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
+| Returns the result of adding the extended double-precision floating-point
+| values `a' and `b'. The operation is performed according to the IEC/IEEE
+| Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_add( float128 a, float128 b )
+floatx80 floatx80_add(floatx80 a, floatx80 b, float_status *status)
{
- flag aSign, bSign;
+ flag aSign, bSign;
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
- if ( aSign == bSign ) {
- return addFloat128Sigs( a, b, aSign );
- }
- else {
- return subFloat128Sigs( a, b, aSign );
- }
+ if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSign = extractFloatx80Sign( a );
+ bSign = extractFloatx80Sign( b );
+ if ( aSign == bSign ) {
+ return addFloatx80Sigs(a, b, aSign, status);
+ }
+ else {
+ return subFloatx80Sigs(a, b, aSign, status);
+ }
}
/*----------------------------------------------------------------------------
-| Returns the result of subtracting the quadruple-precision floating-point
-| values `a' and `b'. The operation is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
+| Returns the result of subtracting the extended double-precision floating-
+| point values `a' and `b'. The operation is performed according to the
+| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_sub( float128 a, float128 b )
+floatx80 floatx80_sub(floatx80 a, floatx80 b, float_status *status)
{
- flag aSign, bSign;
+ flag aSign, bSign;
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
- if ( aSign == bSign ) {
- return subFloat128Sigs( a, b, aSign );
- }
- else {
- return addFloat128Sigs( a, b, aSign );
- }
+ if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSign = extractFloatx80Sign( a );
+ bSign = extractFloatx80Sign( b );
+ if ( aSign == bSign ) {
+ return subFloatx80Sigs(a, b, aSign, status);
+ }
+ else {
+ return addFloatx80Sigs(a, b, aSign, status);
+ }
}
/*----------------------------------------------------------------------------
-| Returns the result of multiplying the quadruple-precision floating-point
-| values `a' and `b'. The operation is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
+| Returns the result of multiplying the extended double-precision floating-
+| point values `a' and `b'. The operation is performed according to the
+| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_mul( float128 a, float128 b )
+floatx80 floatx80_mul(floatx80 a, floatx80 b, float_status *status)
+{
+ flag aSign, bSign, zSign;
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+
+ if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
+ zSign = aSign ^ bSign;
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 )
+ || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ if ( ( bExp | bSig ) == 0 ) goto invalid;
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(zSign, aExp, aSig);
+ }
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ if ( ( aExp | aSig ) == 0 ) {
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ if (inf_clear_intbit(status)) bSig = 0;
+ return packFloatx80(zSign, bExp, bSig);
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+ if ( bExp == 0 ) {
+ if ( bSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
+ }
+ zExp = aExp + bExp - 0x3FFE;
+ mul64To128( aSig, bSig, &zSig0, &zSig1 );
+ if ( 0 < (int64_t) zSig0 ) {
+ shortShift128Left( zSig0, zSig1, 1, &zSig0, &zSig1 );
+ --zExp;
+ }
+ return roundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, zExp, zSig0, zSig1, status);
+}
+
+#ifdef SOFTFLOAT_68K // 21-01-2017: Added for Previous
+floatx80 floatx80_sglmul( floatx80 a, floatx80 b, float_status *status )
{
flag aSign, bSign, zSign;
- int32 aExp, bExp, zExp;
- bits64 aSig0, aSig1, bSig0, bSig1, zSig0, zSig1, zSig2, zSig3;
- float128 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- bSig1 = extractFloat128Frac1( b );
- bSig0 = extractFloat128Frac0( b );
- bExp = extractFloat128Exp( b );
- bSign = extractFloat128Sign( b );
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
zSign = aSign ^ bSign;
if ( aExp == 0x7FFF ) {
- if ( ( aSig0 | aSig1 )
- || ( ( bExp == 0x7FFF ) && ( bSig0 | bSig1 ) ) ) {
- return propagateFloat128NaN( a, b );
+ if ( (uint64_t) ( aSig<<1 )
+ || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) {
+ return propagateFloatx80NaN( a, b, status );
}
- if ( ( bExp | bSig0 | bSig1 ) == 0 ) goto invalid;
- return packFloat128( zSign, 0x7FFF, 0, 0 );
+ if ( ( bExp | bSig ) == 0 ) goto invalid;
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(zSign, aExp, aSig);
}
if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
- if ( ( aExp | aSig0 | aSig1 ) == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = float128_default_nan_low;
- z.high = float128_default_nan_high;
- return z;
+ if ( (uint64_t) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
+ if ( ( aExp | aSig ) == 0 ) {
+ invalid:
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
}
- return packFloat128( zSign, 0x7FFF, 0, 0 );
+ if (inf_clear_intbit(status)) bSig = 0;
+ return packFloatx80(zSign, bExp, bSig);
}
if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return packFloat128( zSign, 0, 0, 0 );
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
+ if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
}
if ( bExp == 0 ) {
- if ( ( bSig0 | bSig1 ) == 0 ) return packFloat128( zSign, 0, 0, 0 );
- normalizeFloat128Subnormal( bSig0, bSig1, &bExp, &bSig0, &bSig1 );
+ if ( bSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
}
- zExp = aExp + bExp - 0x4000;
- aSig0 |= LIT64( 0x0001000000000000 );
- shortShift128Left( bSig0, bSig1, 16, &bSig0, &bSig1 );
- mul128To256( aSig0, aSig1, bSig0, bSig1, &zSig0, &zSig1, &zSig2, &zSig3 );
- add128( zSig0, zSig1, aSig0, aSig1, &zSig0, &zSig1 );
- zSig2 |= ( zSig3 != 0 );
- if ( LIT64( 0x0002000000000000 ) <= zSig0 ) {
- shift128ExtraRightJamming(
- zSig0, zSig1, zSig2, 1, &zSig0, &zSig1, &zSig2 );
- ++zExp;
+ aSig &= LIT64( 0xFFFFFF0000000000 );
+ bSig &= LIT64( 0xFFFFFF0000000000 );
+ zExp = aExp + bExp - 0x3FFE;
+ mul64To128( aSig, bSig, &zSig0, &zSig1 );
+ if ( 0 < (int64_t) zSig0 ) {
+ shortShift128Left( zSig0, zSig1, 1, &zSig0, &zSig1 );
+ --zExp;
}
- return roundAndPackFloat128( zSign, zExp, zSig0, zSig1, zSig2 );
-
+ return roundSigAndPackFloatx80( 32, zSign, zExp, zSig0, zSig1, status);
+
}
+#endif // End of addition for Previous
+
/*----------------------------------------------------------------------------
-| Returns the result of dividing the quadruple-precision floating-point value
-| `a' by the corresponding value `b'. The operation is performed according to
-| the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Returns the result of dividing the extended double-precision floating-point
+| value `a' by the corresponding value `b'. The operation is performed
+| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_div( float128 a, float128 b )
+floatx80 floatx80_div(floatx80 a, floatx80 b, float_status *status)
+{
+ flag aSign, bSign, zSign;
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+ uint64_t rem0, rem1, rem2, term0, term1, term2;
+
+ if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
+ zSign = aSign ^ bSign;
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t)(aSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ goto invalid;
+ }
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(zSign, aExp, aSig);
+ }
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ return packFloatx80( zSign, 0, 0 );
+ }
+ if ( bExp == 0 ) {
+ if ( bSig == 0 ) {
+ if ( ( aExp | aSig ) == 0 ) {
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ float_raise(float_flag_divbyzero, status);
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
+ }
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+ zExp = aExp - bExp + 0x3FFE;
+ rem1 = 0;
+ if ( bSig <= aSig ) {
+ shift128Right( aSig, 0, 1, &aSig, &rem1 );
+ ++zExp;
+ }
+ zSig0 = estimateDiv128To64( aSig, rem1, bSig );
+ mul64To128( bSig, zSig0, &term0, &term1 );
+ sub128( aSig, rem1, term0, term1, &rem0, &rem1 );
+ while ( (int64_t) rem0 < 0 ) {
+ --zSig0;
+ add128( rem0, rem1, 0, bSig, &rem0, &rem1 );
+ }
+ zSig1 = estimateDiv128To64( rem1, 0, bSig );
+ if ( (uint64_t) ( zSig1<<1 ) <= 8 ) {
+ mul64To128( bSig, zSig1, &term1, &term2 );
+ sub128( rem1, 0, term1, term2, &rem1, &rem2 );
+ while ( (int64_t) rem1 < 0 ) {
+ --zSig1;
+ add128( rem1, rem2, 0, bSig, &rem1, &rem2 );
+ }
+ zSig1 |= ( ( rem1 | rem2 ) != 0 );
+ }
+ return roundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, zExp, zSig0, zSig1, status);
+}
+
+#ifdef SOFTFLOAT_68K // 21-01-2017: Addition for Previous
+floatx80 floatx80_sgldiv( floatx80 a, floatx80 b, float_status *status )
{
flag aSign, bSign, zSign;
- int32 aExp, bExp, zExp;
- bits64 aSig0, aSig1, bSig0, bSig1, zSig0, zSig1, zSig2;
- bits64 rem0, rem1, rem2, rem3, term0, term1, term2, term3;
- float128 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- bSig1 = extractFloat128Frac1( b );
- bSig0 = extractFloat128Frac0( b );
- bExp = extractFloat128Exp( b );
- bSign = extractFloat128Sign( b );
+ int32_t aExp, bExp, zExp;
+ uint64_t aSig, bSig, zSig0, zSig1;
+ uint64_t rem0, rem1, rem2, term0, term1, term2;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
zSign = aSign ^ bSign;
if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) return propagateFloat128NaN( a, b );
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
+ if ( (uint64_t) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
goto invalid;
}
- return packFloat128( zSign, 0x7FFF, 0, 0 );
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(zSign, aExp, aSig);
}
if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
- return packFloat128( zSign, 0, 0, 0 );
+ if ( (uint64_t) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
+ return packFloatx80( zSign, 0, 0 );
}
if ( bExp == 0 ) {
- if ( ( bSig0 | bSig1 ) == 0 ) {
- if ( ( aExp | aSig0 | aSig1 ) == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = float128_default_nan_low;
- z.high = float128_default_nan_high;
- return z;
+ if ( bSig == 0 ) {
+ if ( ( aExp | aSig ) == 0 ) {
+ invalid:
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
}
- float_raise( float_flag_divbyzero );
- return packFloat128( zSign, 0x7FFF, 0, 0 );
+ float_raise( float_flag_divbyzero, status );
+ return packFloatx80( zSign, 0x7FFF, floatx80_default_infinity_low );
}
- normalizeFloat128Subnormal( bSig0, bSig1, &bExp, &bSig0, &bSig1 );
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
}
if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return packFloat128( zSign, 0, 0, 0 );
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
+ if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
}
- zExp = aExp - bExp + 0x3FFD;
- shortShift128Left(
- aSig0 | LIT64( 0x0001000000000000 ), aSig1, 15, &aSig0, &aSig1 );
- shortShift128Left(
- bSig0 | LIT64( 0x0001000000000000 ), bSig1, 15, &bSig0, &bSig1 );
- if ( le128( bSig0, bSig1, aSig0, aSig1 ) ) {
- shift128Right( aSig0, aSig1, 1, &aSig0, &aSig1 );
+
+ zExp = aExp - bExp + 0x3FFE;
+ rem1 = 0;
+ if ( bSig <= aSig ) {
+ shift128Right( aSig, 0, 1, &aSig, &rem1 );
++zExp;
}
- zSig0 = estimateDiv128To64( aSig0, aSig1, bSig0 );
- mul128By64To192( bSig0, bSig1, zSig0, &term0, &term1, &term2 );
- sub192( aSig0, aSig1, 0, term0, term1, term2, &rem0, &rem1, &rem2 );
- while ( (sbits64) rem0 < 0 ) {
+ zSig0 = estimateDiv128To64( aSig, rem1, bSig );
+ mul64To128( bSig, zSig0, &term0, &term1 );
+ sub128( aSig, rem1, term0, term1, &rem0, &rem1 );
+ while ( (int64_t) rem0 < 0 ) {
--zSig0;
- add192( rem0, rem1, rem2, 0, bSig0, bSig1, &rem0, &rem1, &rem2 );
+ add128( rem0, rem1, 0, bSig, &rem0, &rem1 );
}
- zSig1 = estimateDiv128To64( rem1, rem2, bSig0 );
- if ( ( zSig1 & 0x3FFF ) <= 4 ) {
- mul128By64To192( bSig0, bSig1, zSig1, &term1, &term2, &term3 );
- sub192( rem1, rem2, 0, term1, term2, term3, &rem1, &rem2, &rem3 );
- while ( (sbits64) rem1 < 0 ) {
+ zSig1 = estimateDiv128To64( rem1, 0, bSig );
+ if ( (uint64_t) ( zSig1<<1 ) <= 8 ) {
+ mul64To128( bSig, zSig1, &term1, &term2 );
+ sub128( rem1, 0, term1, term2, &rem1, &rem2 );
+ while ( (int64_t) rem1 < 0 ) {
--zSig1;
- add192( rem1, rem2, rem3, 0, bSig0, bSig1, &rem1, &rem2, &rem3 );
+ add128( rem1, rem2, 0, bSig, &rem1, &rem2 );
}
- zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 );
+ zSig1 |= ( ( rem1 | rem2 ) != 0 );
}
- shift128ExtraRightJamming( zSig0, zSig1, 0, 15, &zSig0, &zSig1, &zSig2 );
- return roundAndPackFloat128( zSign, zExp, zSig0, zSig1, zSig2 );
-
+ return roundSigAndPackFloatx80( 32, zSign, zExp, zSig0, zSig1, status);
+
}
+#endif // End of addition for Previous
+
/*----------------------------------------------------------------------------
-| Returns the remainder of the quadruple-precision floating-point value `a'
-| with respect to the corresponding value `b'. The operation is performed
+| Returns the remainder of the extended double-precision floating-point value
+| `a' with respect to the corresponding value `b'. The operation is performed
| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_rem( float128 a, float128 b )
-{
- flag aSign, zSign;
- int32 aExp, bExp, expDiff;
- bits64 aSig0, aSig1, bSig0, bSig1, q, term0, term1, term2;
- bits64 allZero, alternateASig0, alternateASig1, sigMean1;
- sbits64 sigMean0;
- float128 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- bSig1 = extractFloat128Frac1( b );
- bSig0 = extractFloat128Frac0( b );
- bExp = extractFloat128Exp( b );
-// bSign = extractFloat128Sign( b );
+#ifndef SOFTFLOAT_68K
+floatx80 floatx80_rem(floatx80 a, floatx80 b, float_status *status)
+{
+ flag aSign, zSign;
+ int32_t aExp, bExp, expDiff;
+ uint64_t aSig0, aSig1, bSig;
+ uint64_t q, term0, term1, alternateASig0, alternateASig1;
+
+ if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSig0 = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig0<<1 )
+ || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ goto invalid;
+ }
+ if ( bExp == 0x7FFF ) {
+ if ((uint64_t)(bSig << 1)) {
+ return propagateFloatx80NaN(a, b, status);
+ }
+ return a;
+ }
+ if ( bExp == 0 ) {
+ if ( bSig == 0 ) {
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
+ }
+ if ( aExp == 0 ) {
+ if ( (uint64_t) ( aSig0<<1 ) == 0 ) return a;
+ normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
+ }
+ bSig |= LIT64( 0x8000000000000000 );
+ zSign = aSign;
+ expDiff = aExp - bExp;
+ aSig1 = 0;
+ if ( expDiff < 0 ) {
+ if ( expDiff < -1 ) return a;
+ shift128Right( aSig0, 0, 1, &aSig0, &aSig1 );
+ expDiff = 0;
+ }
+ q = ( bSig <= aSig0 );
+ if ( q ) aSig0 -= bSig;
+ expDiff -= 64;
+ while ( 0 < expDiff ) {
+ q = estimateDiv128To64( aSig0, aSig1, bSig );
+ q = ( 2 < q ) ? q - 2 : 0;
+ mul64To128( bSig, q, &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( aSig0, aSig1, 62, &aSig0, &aSig1 );
+ expDiff -= 62;
+ }
+ expDiff += 64;
+ if ( 0 < expDiff ) {
+ q = estimateDiv128To64( aSig0, aSig1, bSig );
+ q = ( 2 < q ) ? q - 2 : 0;
+ q >>= 64 - expDiff;
+ mul64To128( bSig, q<<( 64 - expDiff ), &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( 0, bSig, 64 - expDiff, &term0, &term1 );
+ while ( le128( term0, term1, aSig0, aSig1 ) ) {
+ ++q;
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ }
+ }
+ else {
+ term1 = 0;
+ term0 = bSig;
+ }
+ sub128( term0, term1, aSig0, aSig1, &alternateASig0, &alternateASig1 );
+ if ( lt128( alternateASig0, alternateASig1, aSig0, aSig1 )
+ || ( eq128( alternateASig0, alternateASig1, aSig0, aSig1 )
+ && ( q & 1 ) )
+ ) {
+ aSig0 = alternateASig0;
+ aSig1 = alternateASig1;
+ zSign = ! zSign;
+ }
+ return
+ normalizeRoundAndPackFloatx80(
+ 80, zSign, bExp + expDiff, aSig0, aSig1, status);
+
+}
+#else // 09-01-2017: Modified version for Previous
+floatx80 floatx80_rem( floatx80 a, floatx80 b, uint64_t *q, flag *s, float_status *status )
+{
+ flag aSign, bSign, zSign;
+ int32_t aExp, bExp, expDiff;
+ uint64_t aSig0, aSig1, bSig;
+ uint64_t qTemp, term0, term1, alternateASig0, alternateASig1;
+
+ aSig0 = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
+
if ( aExp == 0x7FFF ) {
- if ( ( aSig0 | aSig1 )
- || ( ( bExp == 0x7FFF ) && ( bSig0 | bSig1 ) ) ) {
- return propagateFloat128NaN( a, b );
- }
- goto invalid;
- }
- if ( bExp == 0x7FFF ) {
- if ( bSig0 | bSig1 ) return propagateFloat128NaN( a, b );
- return a;
- }
- if ( bExp == 0 ) {
- if ( ( bSig0 | bSig1 ) == 0 ) {
- invalid:
- float_raise( float_flag_invalid );
- z.low = float128_default_nan_low;
- z.high = float128_default_nan_high;
- return z;
- }
- normalizeFloat128Subnormal( bSig0, bSig1, &bExp, &bSig0, &bSig1 );
- }
- if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return a;
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
- }
- expDiff = aExp - bExp;
- if ( expDiff < -1 ) return a;
- shortShift128Left(
- aSig0 | LIT64( 0x0001000000000000 ),
- aSig1,
- 15 - ( expDiff < 0 ),
- &aSig0,
- &aSig1
- );
- shortShift128Left(
- bSig0 | LIT64( 0x0001000000000000 ), bSig1, 15, &bSig0, &bSig1 );
- q = le128( bSig0, bSig1, aSig0, aSig1 );
- if ( q ) sub128( aSig0, aSig1, bSig0, bSig1, &aSig0, &aSig1 );
- expDiff -= 64;
- while ( 0 < expDiff ) {
- q = estimateDiv128To64( aSig0, aSig1, bSig0 );
- q = ( 4 < q ) ? q - 4 : 0;
- mul128By64To192( bSig0, bSig1, q, &term0, &term1, &term2 );
- shortShift192Left( term0, term1, term2, 61, &term1, &term2, &allZero );
- shortShift128Left( aSig0, aSig1, 61, &aSig0, &allZero );
- sub128( aSig0, 0, term1, term2, &aSig0, &aSig1 );
- expDiff -= 61;
- }
- if ( -64 < expDiff ) {
- q = estimateDiv128To64( aSig0, aSig1, bSig0 );
- q = ( 4 < q ) ? q - 4 : 0;
- q >>= - expDiff;
- shift128Right( bSig0, bSig1, 12, &bSig0, &bSig1 );
- expDiff += 52;
- if ( expDiff < 0 ) {
- shift128Right( aSig0, aSig1, - expDiff, &aSig0, &aSig1 );
- }
- else {
- shortShift128Left( aSig0, aSig1, expDiff, &aSig0, &aSig1 );
- }
- mul128By64To192( bSig0, bSig1, q, &term0, &term1, &term2 );
- sub128( aSig0, aSig1, term1, term2, &aSig0, &aSig1 );
- }
- else {
- shift128Right( aSig0, aSig1, 12, &aSig0, &aSig1 );
- shift128Right( bSig0, bSig1, 12, &bSig0, &bSig1 );
- }
- do {
- alternateASig0 = aSig0;
- alternateASig1 = aSig1;
- ++q;
- sub128( aSig0, aSig1, bSig0, bSig1, &aSig0, &aSig1 );
- } while ( 0 <= (sbits64) aSig0 );
- add128(
- aSig0, aSig1, alternateASig0, alternateASig1, (bits64 *)&sigMean0, &sigMean1 );
- if ( ( sigMean0 < 0 )
- || ( ( ( sigMean0 | sigMean1 ) == 0 ) && ( q & 1 ) ) ) {
- aSig0 = alternateASig0;
- aSig1 = alternateASig1;
- }
- zSign = ( (sbits64) aSig0 < 0 );
- if ( zSign ) sub128( 0, 0, aSig0, aSig1, &aSig0, &aSig1 );
- return
- normalizeRoundAndPackFloat128( aSign ^ zSign, bExp - 4, aSig0, aSig1 );
+ if ( (uint64_t) ( aSig0<<1 )
+ || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) {
+ return propagateFloatx80NaN( a, b, status );
+ }
+ goto invalid;
+ }
+ if ( bExp == 0x7FFF ) {
+ if ( (uint64_t) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
+ *s = (aSign != bSign);
+ *q = 0;
+ return a;
+ }
+ if ( bExp == 0 ) {
+ if ( bSig == 0 ) {
+ invalid:
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
+ }
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
+ }
+ if ( aExp == 0 ) {
+#ifdef SOFTFLOAT_68K
+ if ( aSig0 == 0 ) {
+ *s = (aSign != bSign);
+ *q = 0;
+ return a;
+ }
+#else
+ if ( (uint64_t) ( aSig0<<1 ) == 0 ) return a;
+#endif
+ normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
+ }
+ bSig |= LIT64( 0x8000000000000000 );
+ zSign = aSign;
+ expDiff = aExp - bExp;
+ *s = (aSign != bSign);
+ aSig1 = 0;
+ if ( expDiff < 0 ) {
+ if ( expDiff < -1 ) return a;
+ shift128Right( aSig0, 0, 1, &aSig0, &aSig1 );
+ expDiff = 0;
+ }
+ qTemp = ( bSig <= aSig0 );
+ if ( qTemp ) aSig0 -= bSig;
+ *q = ( expDiff > 63 ) ? 0 : ( qTemp<<expDiff );
+ expDiff -= 64;
+ while ( 0 < expDiff ) {
+ qTemp = estimateDiv128To64( aSig0, aSig1, bSig );
+ qTemp = ( 2 < qTemp ) ? qTemp - 2 : 0;
+ mul64To128( bSig, qTemp, &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( aSig0, aSig1, 62, &aSig0, &aSig1 );
+ *q = ( expDiff > 63 ) ? 0 : ( qTemp<<expDiff );
+ expDiff -= 62;
+ }
+ expDiff += 64;
+ if ( 0 < expDiff ) {
+ qTemp = estimateDiv128To64( aSig0, aSig1, bSig );
+ qTemp = ( 2 < qTemp ) ? qTemp - 2 : 0;
+ qTemp >>= 64 - expDiff;
+ mul64To128( bSig, qTemp<<( 64 - expDiff ), &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( 0, bSig, 64 - expDiff, &term0, &term1 );
+ while ( le128( term0, term1, aSig0, aSig1 ) ) {
+ ++qTemp;
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ }
+ *q += qTemp;
+ }
+ else {
+ term1 = 0;
+ term0 = bSig;
+ }
+ sub128( term0, term1, aSig0, aSig1, &alternateASig0, &alternateASig1 );
+ if ( lt128( alternateASig0, alternateASig1, aSig0, aSig1 )
+ || ( eq128( alternateASig0, alternateASig1, aSig0, aSig1 )
+ && ( qTemp & 1 ) )
+ ) {
+ aSig0 = alternateASig0;
+ aSig1 = alternateASig1;
+ zSign = ! zSign;
+ ++*q;
+ }
+ return
+ normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, bExp + expDiff, aSig0, aSig1, status );
+
+}
+#endif // End of modification
+
+
+#ifdef SOFTFLOAT_68K // 08-01-2017: Added for Previous
+/*----------------------------------------------------------------------------
+ | Returns the modulo remainder of the extended double-precision floating-point
+ | value `a' with respect to the corresponding value `b'.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_mod( floatx80 a, floatx80 b, uint64_t *q, flag *s, float_status *status )
+{
+ flag aSign, bSign, zSign;
+ int32_t aExp, bExp, expDiff;
+ uint64_t aSig0, aSig1, bSig;
+ uint64_t qTemp, term0, term1;
+
+ aSig0 = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig0<<1 )
+ || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) {
+ return propagateFloatx80NaN( a, b, status );
+ }
+ goto invalid;
+ }
+ if ( bExp == 0x7FFF ) {
+ if ( (uint64_t) ( bSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
+ *s = (aSign != bSign);
+ *q = 0;
+ return a;
+ }
+ if ( bExp == 0 ) {
+ if ( bSig == 0 ) {
+ invalid:
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
+ }
+ normalizeFloatx80Subnormal( bSig, &bExp, &bSig );
+ }
+ if ( aExp == 0 ) {
+#ifdef SOFTFLOAT_68K
+ if ( aSig0 == 0 ) {
+ *s = (aSign != bSign);
+ *q = 0;
+ return a;
+ }
+#else
+ if ( (uint64_t) ( aSig0<<1 ) == 0 ) return a;
+#endif
+ normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
+ }
+ bSig |= LIT64( 0x8000000000000000 );
+ zSign = aSign;
+ expDiff = aExp - bExp;
+ *s = (aSign != bSign);
+ aSig1 = 0;
+ if ( expDiff < 0 ) return a;
+ qTemp = ( bSig <= aSig0 );
+ if ( qTemp ) aSig0 -= bSig;
+ *q = ( expDiff > 63 ) ? 0 : ( qTemp<<expDiff );
+ expDiff -= 64;
+ while ( 0 < expDiff ) {
+ qTemp = estimateDiv128To64( aSig0, aSig1, bSig );
+ qTemp = ( 2 < qTemp ) ? qTemp - 2 : 0;
+ mul64To128( bSig, qTemp, &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( aSig0, aSig1, 62, &aSig0, &aSig1 );
+ *q = ( expDiff > 63 ) ? 0 : ( qTemp<<expDiff );
+ expDiff -= 62;
+ }
+ expDiff += 64;
+ if ( 0 < expDiff ) {
+ qTemp = estimateDiv128To64( aSig0, aSig1, bSig );
+ qTemp = ( 2 < qTemp ) ? qTemp - 2 : 0;
+ qTemp >>= 64 - expDiff;
+ mul64To128( bSig, qTemp<<( 64 - expDiff ), &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ shortShift128Left( 0, bSig, 64 - expDiff, &term0, &term1 );
+ while ( le128( term0, term1, aSig0, aSig1 ) ) {
+ ++qTemp;
+ sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 );
+ }
+ *q += qTemp;
+ }
+ return
+ normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision,
+ zSign, bExp + expDiff, aSig0, aSig1, status );
+
+}
+#endif // end of addition for Previous
-}
/*----------------------------------------------------------------------------
-| Returns the square root of the quadruple-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
+| Returns the square root of the extended double-precision floating-point
+| value `a'. The operation is performed according to the IEC/IEEE Standard
+| for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-float128 float128_sqrt( float128 a )
+floatx80 floatx80_sqrt(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp, zExp;
+ uint64_t aSig0, aSig1, zSig0, zSig1, doubleZSig0;
+ uint64_t rem0, rem1, rem2, rem3, term0, term1, term2, term3;
+
+ if (floatx80_invalid_encoding(a)) {
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ aSig0 = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t)(aSig0 << 1))
+ return propagateFloatx80NaNOneArg(a, status);
+ if (!aSign) return inf_clear_intbit(status) ? packFloatx80(aSign, aExp, 0) : a;
+ goto invalid;
+ }
+ if ( aSign ) {
+ if ( ( aExp | aSig0 ) == 0 ) return a;
+ invalid:
+ float_raise(float_flag_invalid, status);
+ return floatx80_default_nan(status);
+ }
+ if ( aExp == 0 ) {
+ if ( aSig0 == 0 ) return packFloatx80( 0, 0, 0 );
+ normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
+ }
+ zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFF;
+ zSig0 = estimateSqrt32( aExp, aSig0>>32 );
+ shift128Right( aSig0, 0, 2 + ( aExp & 1 ), &aSig0, &aSig1 );
+ zSig0 = estimateDiv128To64( aSig0, aSig1, zSig0<<32 ) + ( zSig0<<30 );
+ doubleZSig0 = zSig0<<1;
+ mul64To128( zSig0, zSig0, &term0, &term1 );
+ sub128( aSig0, aSig1, term0, term1, &rem0, &rem1 );
+ while ( (int64_t) rem0 < 0 ) {
+ --zSig0;
+ doubleZSig0 -= 2;
+ add128( rem0, rem1, zSig0>>63, doubleZSig0 | 1, &rem0, &rem1 );
+ }
+ zSig1 = estimateDiv128To64( rem1, 0, doubleZSig0 );
+ if ( ( zSig1 & LIT64( 0x3FFFFFFFFFFFFFFF ) ) <= 5 ) {
+ if ( zSig1 == 0 ) zSig1 = 1;
+ mul64To128( doubleZSig0, zSig1, &term1, &term2 );
+ sub128( rem1, 0, term1, term2, &rem1, &rem2 );
+ mul64To128( zSig1, zSig1, &term2, &term3 );
+ sub192( rem1, rem2, 0, 0, term2, term3, &rem1, &rem2, &rem3 );
+ while ( (int64_t) rem1 < 0 ) {
+ --zSig1;
+ shortShift128Left( 0, zSig1, 1, &term2, &term3 );
+ term3 |= 1;
+ term2 |= doubleZSig0;
+ add192( rem1, rem2, rem3, 0, term2, term3, &rem1, &rem2, &rem3 );
+ }
+ zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 );
+ }
+ shortShift128Left( 0, zSig1, 1, &zSig0, &zSig1 );
+ zSig0 |= doubleZSig0;
+ return roundAndPackFloatx80(status->floatx80_rounding_precision,
+ 0, zExp, zSig0, zSig1, status);
+}
+
+
+#ifdef SOFTFLOAT_68K // 07-01-2017: Added for Previous
+/*----------------------------------------------------------------------------
+ | Returns the mantissa of the extended double-precision floating-point
+ | value `a'.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_getman( floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaNOneArg( a, status );
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
+ }
+
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return packFloatx80(aSign, 0x3fff, aSig);
+}
+
+/*----------------------------------------------------------------------------
+ | Returns the exponent of the extended double-precision floating-point
+ | value `a' as an extended double-precision value.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_getexp( floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaNOneArg( a, status );
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
+ }
+
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return int32_to_floatx80(aExp - 0x3FFF);
+}
+
+/*----------------------------------------------------------------------------
+ | Scales extended double-precision floating-point value in operand `a' by
+ | value `b'. The function truncates the value in the second operand 'b' to
+ | an integral value and adds that value to the exponent of the operand 'a'.
+ | The operation performed according to the IEC/IEEE Standard for Binary
+ | Floating-Point Arithmetic.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_scale(floatx80 a, floatx80 b, float_status *status)
+{
+ flag aSign, bSign;
+ int32_t aExp, bExp, shiftCount;
+ uint64_t aSig, bSig;
+
+ aSig = extractFloatx80Frac(a);
+ aExp = extractFloatx80Exp(a);
+ aSign = extractFloatx80Sign(a);
+ bSig = extractFloatx80Frac(b);
+ bExp = extractFloatx80Exp(b);
+ bSign = extractFloatx80Sign(b);
+
+ if ( bExp == 0x7FFF ) {
+ if ( (uint64_t) ( bSig<<1 ) ||
+ ( ( aExp == 0x7FFF ) && (uint64_t) ( aSig<<1 ) ) ) {
+ return propagateFloatx80NaN( a, b, status );
+ }
+ float_raise( float_flag_invalid, status );
+ return floatx80_default_nan(status);
+ }
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) ) return propagateFloatx80NaN( a, b, status );
+ return a;
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0);
+ if ( bExp < 0x3FFF ) return a;
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ if (bExp < 0x3FFF) {
+ return roundAndPackFloatx80(
+ status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status);
+ }
+
+ if ( 0x400F < bExp ) {
+ aExp = bSign ? -0x6001 : 0xE000;
+ return roundAndPackFloatx80(
+ status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status );
+ }
+
+ shiftCount = 0x403E - bExp;
+ bSig >>= shiftCount;
+ aExp = bSign ? ( aExp - bSig ) : ( aExp + bSig );
+
+ return roundAndPackFloatx80(
+ status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status);
+
+}
+
+/*-----------------------------------------------------------------------------
+ | Calculates the absolute value of the extended double-precision floating-point
+ | value `a'. The operation is performed according to the IEC/IEEE Standard
+ | for Binary Floating-Point Arithmetic.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_abs(floatx80 a, float_status *status)
+{
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac(a);
+ aExp = extractFloatx80Exp(a);
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) )
+ return propagateFloatx80NaNOneArg( a, status );
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(0, aExp, aSig);
+ }
+
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( 0, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundAndPackFloatx80(
+ status->floatx80_rounding_precision, 0, aExp, aSig, 0, status );
+
+}
+
+/*-----------------------------------------------------------------------------
+ | Changes the sign of the extended double-precision floating-point value 'a'.
+ | The operation is performed according to the IEC/IEEE Standard for Binary
+ | Floating-Point Arithmetic.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_neg(floatx80 a, float_status *status)
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac(a);
+ aExp = extractFloatx80Exp(a);
+ aSign = extractFloatx80Sign(a);
+
+ if ( aExp == 0x7FFF ) {
+ if ( (uint64_t) ( aSig<<1 ) )
+ return propagateFloatx80NaNOneArg( a, status );
+ if (inf_clear_intbit(status)) aSig = 0;
+ return packFloatx80(!aSign, aExp, aSig);
+ }
+
+ aSign = !aSign;
+
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+ normalizeFloatx80Subnormal( aSig, &aExp, &aSig );
+ }
+
+ return roundAndPackFloatx80(
+ status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status );
+
+}
+
+/*----------------------------------------------------------------------------
+ | Returns the result of comparing the extended double-precision floating-
+ | point values `a' and `b'. The result is abstracted for matching the
+ | corresponding condition codes.
+ *----------------------------------------------------------------------------*/
+
+floatx80 floatx80_cmp( floatx80 a, floatx80 b, float_status *status )
+{
+ flag aSign, bSign;
+ int32_t aExp, bExp;
+ uint64_t aSig, bSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+ bSig = extractFloatx80Frac( b );
+ bExp = extractFloatx80Exp( b );
+ bSign = extractFloatx80Sign( b );
+
+ if ( ( aExp == 0x7FFF && (uint64_t) ( aSig<<1 ) ) ||
+ ( bExp == 0x7FFF && (uint64_t) ( bSig<<1 ) ) ) {
+ // 68040 FCMP -NaN return N flag set
+ if (fcmp_signed_nan(status))
+ return propagateFloatx80NaN(a, b, status );
+ return propagateFloatx80NaN(packFloatx80(0, aExp, aSig),
+ packFloatx80(0, bExp, bSig), status);
+ }
+
+ if ( bExp < aExp ) return packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
+ if ( aExp < bExp ) return packFloatx80( bSign ^ 1, 0x3FFF, LIT64( 0x8000000000000000 ) );
+
+ if ( aExp == 0x7FFF ) {
+ if ( aSign == bSign ) return packFloatx80( aSign, 0, 0 );
+ return packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
+ }
+
+ if ( bSig < aSig ) return packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
+ if ( aSig < bSig ) return packFloatx80( bSign ^ 1, 0x3FFF, LIT64( 0x8000000000000000 ) );
+
+ if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 );
+
+ if ( aSign == bSign ) return packFloatx80( 0, 0, 0 );
+
+ return packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) );
+
+}
+
+floatx80 floatx80_tst( floatx80 a, float_status *status )
+{
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+
+ if ( aExp == 0x7FFF && (uint64_t) ( aSig<<1 ) )
+ return propagateFloatx80NaNOneArg( a, status );
+ return a;
+}
+
+floatx80 floatx80_move( floatx80 a, float_status *status )
+{
+ flag aSign;
+ int32_t aExp;
+ uint64_t aSig;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( aExp == 0x7FFF ) {
+ if ((uint64_t)(aSig << 1)) return propagateFloatx80NaNOneArg(a, status);
+ return inf_clear_intbit(status) ? packFloatx80(aSign, aExp, 0) : a;
+ }
+ if ( aExp == 0 ) {
+ if ( aSig == 0 ) return a;
+ return normalizeRoundAndPackFloatx80( status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status );
+ }
+ return roundAndPackFloatx80( status->floatx80_rounding_precision, aSign, aExp, aSig, 0, status );
+}
+
+floatx80 floatx80_denormalize( floatx80 a, flag eSign)
{
flag aSign;
- int32 aExp, zExp;
- bits64 aSig0, aSig1, zSig0, zSig1, zSig2, doubleZSig0;
- bits64 rem0, rem1, rem2, rem3, term0, term1, term2, term3;
- float128 z;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp == 0x7FFF ) {
- if ( aSig0 | aSig1 ) return propagateFloat128NaN( a, a );
- if ( ! aSign ) return a;
- goto invalid;
- }
- if ( aSign ) {
- if ( ( aExp | aSig0 | aSig1 ) == 0 ) return a;
- invalid:
- float_raise( float_flag_invalid );
- z.low = float128_default_nan_low;
- z.high = float128_default_nan_high;
- return z;
- }
- if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return packFloat128( 0, 0, 0, 0 );
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
- }
- zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFE;
- aSig0 |= LIT64( 0x0001000000000000 );
- zSig0 = estimateSqrt32( aExp, aSig0>>17 );
- shortShift128Left( aSig0, aSig1, 13 - ( aExp & 1 ), &aSig0, &aSig1 );
- zSig0 = estimateDiv128To64( aSig0, aSig1, zSig0<<32 ) + ( zSig0<<30 );
- doubleZSig0 = zSig0<<1;
- mul64To128( zSig0, zSig0, &term0, &term1 );
- sub128( aSig0, aSig1, term0, term1, &rem0, &rem1 );
- while ( (sbits64) rem0 < 0 ) {
- --zSig0;
- doubleZSig0 -= 2;
- add128( rem0, rem1, zSig0>>63, doubleZSig0 | 1, &rem0, &rem1 );
- }
- zSig1 = estimateDiv128To64( rem1, 0, doubleZSig0 );
- if ( ( zSig1 & 0x1FFF ) <= 5 ) {
- if ( zSig1 == 0 ) zSig1 = 1;
- mul64To128( doubleZSig0, zSig1, &term1, &term2 );
- sub128( rem1, 0, term1, term2, &rem1, &rem2 );
- mul64To128( zSig1, zSig1, &term2, &term3 );
- sub192( rem1, rem2, 0, 0, term2, term3, &rem1, &rem2, &rem3 );
- while ( (sbits64) rem1 < 0 ) {
- --zSig1;
- shortShift128Left( 0, zSig1, 1, &term2, &term3 );
- term3 |= 1;
- term2 |= doubleZSig0;
- add192( rem1, rem2, rem3, 0, term2, term3, &rem1, &rem2, &rem3 );
+ int32_t aExp;
+ uint64_t aSig;
+ int32_t shiftCount;
+
+ aSig = extractFloatx80Frac( a );
+ aExp = extractFloatx80Exp( a );
+ aSign = extractFloatx80Sign( a );
+
+ if ( eSign ) {
+ shiftCount = 0x8000 - aExp;
+ aExp = 0;
+ if (shiftCount > 63) {
+ aSig = 0;
+ } else {
+ aSig >>= shiftCount;
}
- zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 );
}
- shift128ExtraRightJamming( zSig0, zSig1, 0, 14, &zSig0, &zSig1, &zSig2 );
- return roundAndPackFloat128( 0, zExp, zSig0, zSig1, zSig2 );
-
+ return packFloatx80(aSign, aExp, aSig);
}
+#endif // End of addition for Previous
+
/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is equal to
-| the corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Returns 1 if the extended double-precision floating-point value `a' is
+| equal to the corresponding value `b', and 0 otherwise. The comparison is
+| performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-flag float128_eq( float128 a, float128 b )
+flag floatx80_eq( floatx80 a, floatx80 b, float_status *status )
{
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
+ if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( a )<<1 ) )
+ || ( ( extractFloatx80Exp( b ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( b )<<1 ) )
) {
- if ( float128_is_signaling_nan( a )
- || float128_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
+ if ( floatx80_is_signaling_nan( a )
+ || floatx80_is_signaling_nan( b ) ) {
+ float_raise( float_flag_invalid, status );
}
return 0;
}
( a.low == b.low )
&& ( ( a.high == b.high )
|| ( ( a.low == 0 )
- && ( (bits64) ( ( a.high | b.high )<<1 ) == 0 ) )
+ && ( (uint16_t) ( ( a.high | b.high )<<1 ) == 0 ) )
);
}
/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is less than
-| or equal to the corresponding value `b', and 0 otherwise. The comparison
-| is performed according to the IEC/IEEE Standard for Binary Floating-Point
-| Arithmetic.
+| Returns 1 if the extended double-precision floating-point value `a' is
+| less than or equal to the corresponding value `b', and 0 otherwise. The
+| comparison is performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/
-flag float128_le( float128 a, float128 b )
+flag floatx80_le( floatx80 a, floatx80 b, float_status *status )
{
flag aSign, bSign;
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
+ if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( a )<<1 ) )
+ || ( ( extractFloatx80Exp( b ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( b )<<1 ) )
) {
- float_raise( float_flag_invalid );
+ float_raise( float_flag_invalid, status );
return 0;
}
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
+ aSign = extractFloatx80Sign( a );
+ bSign = extractFloatx80Sign( b );
if ( aSign != bSign ) {
return
aSign
- || ( ( ( (bits64) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
+ || ( ( ( (uint16_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
== 0 );
}
return
aSign ? le128( b.high, b.low, a.high, a.low )
: le128( a.high, a.low, b.high, b.low );
-
}
/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. The comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+| Returns 1 if the extended double-precision floating-point value `a' is
+| less than the corresponding value `b', and 0 otherwise. The comparison
+| is performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-flag float128_lt( float128 a, float128 b )
+flag floatx80_lt( floatx80 a, floatx80 b, float_status *status )
{
flag aSign, bSign;
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
+ if ( ( ( extractFloatx80Exp( a ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( a )<<1 ) )
+ || ( ( extractFloatx80Exp( b ) == 0x7FFF )
+ && (uint64_t) ( extractFloatx80Frac( b )<<1 ) )
) {
- float_raise( float_flag_invalid );
+ float_raise( float_flag_invalid, status );
return 0;
}
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
+ aSign = extractFloatx80Sign( a );
+ bSign = extractFloatx80Sign( b );
if ( aSign != bSign ) {
return
aSign
- && ( ( ( (bits64) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
+ && ( ( ( (uint16_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
!= 0 );
}
return
}
-/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is equal to
-| the corresponding value `b', and 0 otherwise. The invalid exception is
-| raised if either operand is a NaN. Otherwise, the comparison is performed
-| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float128_eq_signaling( float128 a, float128 b )
-{
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
- ) {
- float_raise( float_flag_invalid );
- return 0;
- }
- return
- ( a.low == b.low )
- && ( ( a.high == b.high )
- || ( ( a.low == 0 )
- && ( (bits64) ( ( a.high | b.high )<<1 ) == 0 ) )
- );
-
-}
-
-/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is less than
-| or equal to the corresponding value `b', and 0 otherwise. Quiet NaNs do not
-| cause an exception. Otherwise, the comparison is performed according to the
-| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-flag float128_le_quiet( float128 a, float128 b )
-{
- flag aSign, bSign;
-
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
- ) {
- if ( float128_is_signaling_nan( a )
- || float128_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- || ( ( ( (bits64) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- == 0 );
- }
- return
- aSign ? le128( b.high, b.low, a.high, a.low )
- : le128( a.high, a.low, b.high, b.low );
-
-}
/*----------------------------------------------------------------------------
-| Returns 1 if the quadruple-precision floating-point value `a' is less than
-| the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause an
-| exception. Otherwise, the comparison is performed according to the IEC/IEEE
-| Standard for Binary Floating-Point Arithmetic.
+| Returns the result of converting the 64-bit two's complement integer `a'
+| to the extended double-precision floating-point format. The conversion
+| is performed according to the IEC/IEEE Standard for Binary Floating-Point
+| Arithmetic.
*----------------------------------------------------------------------------*/
-flag float128_lt_quiet( float128 a, float128 b )
+floatx80 int64_to_floatx80( int64_t a )
{
- flag aSign, bSign;
-
- if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
- && ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
- || ( ( extractFloat128Exp( b ) == 0x7FFF )
- && ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
- ) {
- if ( float128_is_signaling_nan( a )
- || float128_is_signaling_nan( b ) ) {
- float_raise( float_flag_invalid );
- }
- return 0;
- }
- aSign = extractFloat128Sign( a );
- bSign = extractFloat128Sign( b );
- if ( aSign != bSign ) {
- return
- aSign
- && ( ( ( (bits64) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
- != 0 );
- }
- return
- aSign ? lt128( b.high, b.low, a.high, a.low )
- : lt128( a.high, a.low, b.high, b.low );
+ flag zSign;
+ uint64_t absA;
+ int8_t shiftCount;
+ if ( a == 0 ) return packFloatx80( 0, 0, 0 );
+ zSign = ( a < 0 );
+ absA = zSign ? - a : a;
+ shiftCount = countLeadingZeros64( absA );
+ return packFloatx80( zSign, 0x403E - shiftCount, absA<<shiftCount );
}
-
-#endif
projects / pistorm / blobdiff