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| author | Måns Rullgård <mans@mansr.com> | 2008-03-18 22:28:33 +0000 |
|---|---|---|
| committer | Måns Rullgård <mans@mansr.com> | 2008-03-18 22:28:33 +0000 |
| commit | 3662d880ed9fdc3aa952f174f620f53d1fc1f789 (patch) | |
| tree | c8d8716c648eb17dbdc79ecd7604e34a5a4fc366 | |
| parent | c5fec7d76c6bae70aa0f700a86f43d45337e8a92 (diff) | |
| download | ffmpeg-3662d880ed9fdc3aa952f174f620f53d1fc1f789.tar.gz | |
32/64-bit agnostic x86 bswap
Originally committed as revision 12496 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavutil/bswap.h | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/libavutil/bswap.h b/libavutil/bswap.h index e78c981b02..64ac5d2384 100644 --- a/libavutil/bswap.h +++ b/libavutil/bswap.h @@ -34,16 +34,10 @@ #include <byteswap.h> #else -#ifdef ARCH_X86_64 -# define LEGACY_REGS "=Q" -#else -# define LEGACY_REGS "=q" -#endif - static av_always_inline uint16_t bswap_16(uint16_t x) { #if defined(ARCH_X86) - asm("rorw $8, %0" : LEGACY_REGS (x) : "0" (x)); + asm("rorw $8, %0" : "+r"(x)); #elif defined(ARCH_SH4) asm("swap.b %0,%0" : "=r"(x) : "0"(x)); #else @@ -56,15 +50,13 @@ static av_always_inline uint32_t bswap_32(uint32_t x) { #if defined(ARCH_X86) #ifdef HAVE_BSWAP - asm("bswap %0": - "=r" (x) : + asm("bswap %0" : "+r" (x)); #else - asm("xchgb %b0,%h0\n" - "rorl $16,%0 \n" - "xchgb %b0,%h0": - LEGACY_REGS (x) : + asm("rorw $8, %w0 \n\t" + "rorl $16, %0 \n\t" + "rorw $8, %w0" + : "+r"(x)); #endif - "0" (x)); #elif defined(ARCH_SH4) asm("swap.b %0,%0\n" "swap.w %0,%0\n" |