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Code Issues Releases Activity

avutil/x86/bswap: Add msvc bswap instrinsics.

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This adds msvc optimisations as well as fixing an error in icl whereby it will generate invalid code otherwise.

Signed-off-by: Matt Oliver <protogonoi@gmail.com>
This commit is contained in:
Matt Oliver
2015-11-09 20:19:32 +11:00
parent edd0c1d78a
commit 9b9c9ef3b4
1 changed files with 24 additions and 1 deletions
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25
libavutil/x86/bswap.h
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@@ -28,7 +28,30 @@
#include "config.h"
#include "libavutil/attributes.h"
#if HAVE_INLINE_ASM
#if defined(_MSC_VER)
#define av_bswap16 av_bswap16
static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
{
return _rotr16(x, 8);
}
#define av_bswap32 av_bswap32
static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
{
return _byteswap_ulong(x);
}
#if ARCH_X86_64
#define av_bswap64 av_bswap64
static inline uint64_t av_const av_bswap64(uint64_t x)
{
return _byteswap_uint64(x);
}
#endif
#elif HAVE_INLINE_ASM
#if AV_GCC_VERSION_AT_MOST(4,0)
#define av_bswap16 av_bswap16