/*
* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
+ * Copyright (c) 2013 RISC OS Open Ltd <bavison@riscosopen.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
-#include "asm.S"
-
- .syntax unified
+#include "libavutil/arm/asm.S"
/**
* ARM VFP optimized float to int16 conversion.
* Assume that len is a positive number and is multiple of 8, destination
* buffer is at least 4 bytes aligned (8 bytes alignment is better for
- * performance), little endian byte sex
+ * performance), little-endian byte sex.
*/
@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len)
function ff_float_to_int16_vfp, export=1
vmov r5, r6, s2, s3
vmov r7, r8, s4, s5
vmov ip, lr, s6, s7
+ it gt
vldmiagt r1!, {s16-s23}
ssat r4, #16, r4
ssat r3, #16, r3
ssat r5, #16, r5
pkhbt r3, r3, r4, lsl #16
pkhbt r4, r5, r6, lsl #16
+ itttt gt
vcvtgt.s32.f32 s0, s16
vcvtgt.s32.f32 s1, s17
vcvtgt.s32.f32 s2, s18
vcvtgt.s32.f32 s3, s19
+ itttt gt
vcvtgt.s32.f32 s4, s20
vcvtgt.s32.f32 s5, s21
vcvtgt.s32.f32 s6, s22
vpop {d8-d11}
pop {r4-r8,pc}
endfunc
+
+/**
+ * ARM VFP optimised int32 to float conversion.
+ * Assume len is a multiple of 8, destination buffer is at least 4 bytes aligned
+ * (16 bytes alignment is best for BCM2835), little-endian.
+ */
+@ void ff_int32_to_float_fmul_array8_vfp(FmtConvertContext *c, float *dst, const int32_t *src, const float *mul, int len)
+function ff_int32_to_float_fmul_array8_vfp, export=1
+ push {lr}
+ ldr a1, [sp, #4]
+ subs lr, a1, #3*8
+ bcc 50f @ too short to pipeline
+ @ Now need to find (len / 8) % 3. The approximation
+ @ x / 24 = (x * 0xAB) >> 12
+ @ is good for x < 4096, which is true for both AC3 and DCA.
+ mov a1, #0xAB
+ ldr ip, =0x03070000 @ RunFast mode, short vectors of length 8, stride 1
+ mul a1, lr, a1
+ vpush {s16-s31}
+ mov a1, a1, lsr #12
+ add a1, a1, a1, lsl #1
+ rsb a1, a1, lr, lsr #3
+ cmp a1, #1
+ fmrx a1, FPSCR
+ fmxr FPSCR, ip
+ beq 11f
+ blo 10f
+ @ Array is (2 + multiple of 3) x 8 floats long
+ @ drop through...
+ vldmia a3!, {s16-s23}
+ vldmia a4!, {s2,s3}
+ vldmia a3!, {s24-s31}
+ vcvt.f32.s32 s16, s16
+ vcvt.f32.s32 s17, s17
+ vcvt.f32.s32 s18, s18
+ vcvt.f32.s32 s19, s19
+ vcvt.f32.s32 s20, s20
+ vcvt.f32.s32 s21, s21
+ vcvt.f32.s32 s22, s22
+ vcvt.f32.s32 s23, s23
+ vmul.f32 s16, s16, s2
+ @ drop through...
+3:
+ vldmia a3!, {s8-s15}
+ vldmia a4!, {s1}
+ vcvt.f32.s32 s24, s24
+ vcvt.f32.s32 s25, s25
+ vcvt.f32.s32 s26, s26
+ vcvt.f32.s32 s27, s27
+ vcvt.f32.s32 s28, s28
+ vcvt.f32.s32 s29, s29
+ vcvt.f32.s32 s30, s30
+ vcvt.f32.s32 s31, s31
+ vmul.f32 s24, s24, s3
+ vstmia a2!, {s16-s19}
+ vstmia a2!, {s20-s23}
+2:
+ vldmia a3!, {s16-s23}
+ vldmia a4!, {s2}
+ vcvt.f32.s32 s8, s8
+ vcvt.f32.s32 s9, s9
+ vcvt.f32.s32 s10, s10
+ vcvt.f32.s32 s11, s11
+ vcvt.f32.s32 s12, s12
+ vcvt.f32.s32 s13, s13
+ vcvt.f32.s32 s14, s14
+ vcvt.f32.s32 s15, s15
+ vmul.f32 s8, s8, s1
+ vstmia a2!, {s24-s27}
+ vstmia a2!, {s28-s31}
+1:
+ vldmia a3!, {s24-s31}
+ vldmia a4!, {s3}
+ vcvt.f32.s32 s16, s16
+ vcvt.f32.s32 s17, s17
+ vcvt.f32.s32 s18, s18
+ vcvt.f32.s32 s19, s19
+ vcvt.f32.s32 s20, s20
+ vcvt.f32.s32 s21, s21
+ vcvt.f32.s32 s22, s22
+ vcvt.f32.s32 s23, s23
+ vmul.f32 s16, s16, s2
+ vstmia a2!, {s8-s11}
+ vstmia a2!, {s12-s15}
+
+ subs lr, lr, #8*3
+ bpl 3b
+
+ vcvt.f32.s32 s24, s24
+ vcvt.f32.s32 s25, s25
+ vcvt.f32.s32 s26, s26
+ vcvt.f32.s32 s27, s27
+ vcvt.f32.s32 s28, s28
+ vcvt.f32.s32 s29, s29
+ vcvt.f32.s32 s30, s30
+ vcvt.f32.s32 s31, s31
+ vmul.f32 s24, s24, s3
+ vstmia a2!, {s16-s19}
+ vstmia a2!, {s20-s23}
+ vstmia a2!, {s24-s27}
+ vstmia a2!, {s28-s31}
+
+ fmxr FPSCR, a1
+ vpop {s16-s31}
+ pop {pc}
+
+10: @ Array is (multiple of 3) x 8 floats long
+ vldmia a3!, {s8-s15}
+ vldmia a4!, {s1,s2}
+ vldmia a3!, {s16-s23}
+ vcvt.f32.s32 s8, s8
+ vcvt.f32.s32 s9, s9
+ vcvt.f32.s32 s10, s10
+ vcvt.f32.s32 s11, s11
+ vcvt.f32.s32 s12, s12
+ vcvt.f32.s32 s13, s13
+ vcvt.f32.s32 s14, s14
+ vcvt.f32.s32 s15, s15
+ vmul.f32 s8, s8, s1
+ b 1b
+
+11: @ Array is (1 + multiple of 3) x 8 floats long
+ vldmia a3!, {s24-s31}
+ vldmia a4!, {s3}
+ vldmia a3!, {s8-s15}
+ vldmia a4!, {s1}
+ vcvt.f32.s32 s24, s24
+ vcvt.f32.s32 s25, s25
+ vcvt.f32.s32 s26, s26
+ vcvt.f32.s32 s27, s27
+ vcvt.f32.s32 s28, s28
+ vcvt.f32.s32 s29, s29
+ vcvt.f32.s32 s30, s30
+ vcvt.f32.s32 s31, s31
+ vmul.f32 s24, s24, s3
+ b 2b
+
+50:
+ ldr lr, =0x03070000 @ RunFast mode, short vectors of length 8, stride 1
+ fmrx ip, FPSCR
+ fmxr FPSCR, lr
+51:
+ vldmia a3!, {s8-s15}
+ vldmia a4!, {s0}
+ vcvt.f32.s32 s8, s8
+ vcvt.f32.s32 s9, s9
+ vcvt.f32.s32 s10, s10
+ vcvt.f32.s32 s11, s11
+ vcvt.f32.s32 s12, s12
+ vcvt.f32.s32 s13, s13
+ vcvt.f32.s32 s14, s14
+ vcvt.f32.s32 s15, s15
+ vmul.f32 s8, s8, s0
+ subs a1, a1, #8
+ vstmia a2!, {s8-s11}
+ vstmia a2!, {s12-s15}
+ bne 51b
+
+ fmxr FPSCR, ip
+ pop {pc}
+endfunc
+
+/**
+ * ARM VFP optimised int32 to float conversion.
+ * Assume len is a multiple of 8, destination buffer is at least 4 bytes aligned
+ * (16 bytes alignment is best for BCM2835), little-endian.
+ * TODO: could be further optimised by unrolling and interleaving, as above
+ */
+@ void ff_int32_to_float_fmul_scalar_vfp(float *dst, const int32_t *src, float mul, int len)
+function ff_int32_to_float_fmul_scalar_vfp, export=1
+VFP tmp .req a4
+VFP len .req a3
+NOVFP tmp .req a3
+NOVFP len .req a4
+NOVFP vmov s0, a3
+ ldr tmp, =0x03070000 @ RunFast mode, short vectors of length 8, stride 1
+ fmrx ip, FPSCR
+ fmxr FPSCR, tmp
+1:
+ vldmia a2!, {s8-s15}
+ vcvt.f32.s32 s8, s8
+ vcvt.f32.s32 s9, s9
+ vcvt.f32.s32 s10, s10
+ vcvt.f32.s32 s11, s11
+ vcvt.f32.s32 s12, s12
+ vcvt.f32.s32 s13, s13
+ vcvt.f32.s32 s14, s14
+ vcvt.f32.s32 s15, s15
+ vmul.f32 s8, s8, s0
+ subs len, len, #8
+ vstmia a1!, {s8-s11}
+ vstmia a1!, {s12-s15}
+ bne 1b
+
+ fmxr FPSCR, ip
+ bx lr
+endfunc
+ .unreq tmp
+ .unreq len
projects / ffmpeg / blobdiff