/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file bswap.h
- * byte swap.
+ * byte swapping routines
*/
-#ifndef __BSWAP_H__
-#define __BSWAP_H__
+#ifndef FFMPEG_BSWAP_H
+#define FFMPEG_BSWAP_H
+
+#include <stdint.h>
+#include "config.h"
+#include "common.h"
#ifdef HAVE_BYTESWAP_H
#include <byteswap.h>
#else
-#ifdef ARCH_X86_64
-# define LEGACY_REGS "=Q"
-#else
-# define LEGACY_REGS "=q"
-#endif
-
-#if defined(ARCH_X86) || defined(ARCH_X86_64)
-static always_inline uint16_t bswap_16(uint16_t x)
+static av_always_inline av_const uint16_t bswap_16(uint16_t x)
{
- __asm("rorw $8, %0" :
- LEGACY_REGS (x) :
- "0" (x));
- return x;
-}
-
-static always_inline uint32_t bswap_32(uint32_t x)
-{
-#if __CPU__ != 386
- __asm("bswap %0":
- "=r" (x) :
+#if defined(ARCH_X86)
+ asm("rorw $8, %0" : "+r"(x));
+#elif defined(ARCH_SH4)
+ asm("swap.b %0,%0" : "=r"(x) : "0"(x));
#else
- __asm("xchgb %b0,%h0\n"
- " rorl $16,%0\n"
- " xchgb %b0,%h0":
- LEGACY_REGS (x) :
+ x= (x>>8) | (x<<8);
#endif
- "0" (x));
- return x;
+ return x;
}
-static inline uint64_t bswap_64(uint64_t x)
+static av_always_inline av_const uint32_t bswap_32(uint32_t x)
{
-#ifdef ARCH_X86_64
- __asm("bswap %0":
- "=r" (x) :
- "0" (x));
- return x;
+#if defined(ARCH_X86)
+#ifdef HAVE_BSWAP
+ asm("bswap %0" : "+r" (x));
#else
- union {
- uint64_t ll;
- struct {
- uint32_t l,h;
- } l;
- } r;
- r.l.l = bswap_32 (x);
- r.l.h = bswap_32 (x>>32);
- return r.ll;
+ asm("rorw $8, %w0 \n\t"
+ "rorl $16, %0 \n\t"
+ "rorw $8, %w0"
+ : "+r"(x));
#endif
-}
-
#elif defined(ARCH_SH4)
-
-static always_inline uint16_t bswap_16(uint16_t x) {
- __asm__("swap.b %0,%0":"=r"(x):"0"(x));
- return x;
-}
-
-static always_inline uint32_t bswap_32(uint32_t x) {
- __asm__(
- "swap.b %0,%0\n"
+ asm("swap.b %0,%0\n"
"swap.w %0,%0\n"
"swap.b %0,%0\n"
- :"=r"(x):"0"(x));
- return x;
-}
-
-static inline uint64_t bswap_64(uint64_t x)
-{
- union {
- uint64_t ll;
- struct {
- uint32_t l,h;
- } l;
- } r;
- r.l.l = bswap_32 (x);
- r.l.h = bswap_32 (x>>32);
- return r.ll;
-}
-#else
-
-static always_inline uint16_t bswap_16(uint16_t x){
- return (x>>8) | (x<<8);
-}
-
-#ifdef ARCH_ARM
-static always_inline uint32_t bswap_32(uint32_t x){
+ : "=r"(x) : "0"(x));
+#elif defined(ARCH_ARM)
uint32_t t;
- __asm__ (
- "eor %1, %0, %0, ror #16 \n\t"
- "bic %1, %1, #0xFF0000 \n\t"
- "mov %0, %0, ror #8 \n\t"
- "eor %0, %0, %1, lsr #8 \n\t"
- : "+r"(x), "+r"(t));
- return x;
-}
+ asm ("eor %1, %0, %0, ror #16 \n\t"
+ "bic %1, %1, #0xFF0000 \n\t"
+ "mov %0, %0, ror #8 \n\t"
+ "eor %0, %0, %1, lsr #8 \n\t"
+ : "+r"(x), "+r"(t));
+#elif defined(ARCH_BFIN)
+ unsigned tmp;
+ asm("%1 = %0 >> 8 (V); \n\t"
+ "%0 = %0 << 8 (V); \n\t"
+ "%0 = %0 | %1; \n\t"
+ "%0 = PACK(%0.L, %0.H); \n\t"
+ : "+d"(x), "=&d"(tmp));
#else
-static always_inline uint32_t bswap_32(uint32_t x){
x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
- return (x>>16) | (x<<16);
-}
+ x= (x>>16) | (x<<16);
#endif
+ return x;
+}
-static inline uint64_t bswap_64(uint64_t x)
+static inline uint64_t av_const bswap_64(uint64_t x)
{
#if 0
x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
return (x>>32) | (x<<32);
+#elif defined(ARCH_X86_64)
+ asm("bswap %0": "=r" (x) : "0" (x));
+ return x;
#else
union {
uint64_t ll;
return r.ll;
#endif
}
-#endif /* !ARCH_X86 */
#endif /* !HAVE_BYTESWAP_H */
#define le2me_64(x) (x)
#endif
-#endif /* __BSWAP_H__ */
+#endif /* FFMPEG_BSWAP_H */