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x86: XOP/FMA4 CPU detection support

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This commit is contained in:
Jason Garrett-Glaser 2011-09-26 14:44:47 -07:00
parent 3d371f417e
commit 96a59cf37b
4 changed files with 15 additions and 2 deletions
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4
libavutil/avutil.h
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@ -40,8 +40,8 @@
#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
#define LIBAVUTIL_VERSION_MAJOR 51
#define LIBAVUTIL_VERSION_MINOR 10
#define LIBAVUTIL_VERSION_MICRO 2
#define LIBAVUTIL_VERSION_MINOR 11
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \

2
libavutil/cpu.c
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@ -60,6 +60,8 @@ static const struct {
{ AV_CPU_FLAG_SSE4, "sse4.1" },
{ AV_CPU_FLAG_SSE42, "sse4.2" },
{ AV_CPU_FLAG_AVX, "avx" },
{ AV_CPU_FLAG_XOP, "xop" },
{ AV_CPU_FLAG_FMA4, "fma4" },
{ AV_CPU_FLAG_3DNOW, "3dnow" },
{ AV_CPU_FLAG_3DNOWEXT, "3dnowext" },
#endif

2
libavutil/cpu.h
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@ -38,6 +38,8 @@
#define AV_CPU_FLAG_SSE4 0x0100 ///< Penryn SSE4.1 functions
#define AV_CPU_FLAG_SSE42 0x0200 ///< Nehalem SSE4.2 functions
#define AV_CPU_FLAG_AVX 0x4000 ///< AVX functions: requires OS support even if YMM registers aren't used
#define AV_CPU_FLAG_XOP 0x0400 ///< Bulldozer XOP functions
#define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
#define AV_CPU_FLAG_IWMMXT 0x0100 ///< XScale IWMMXT
#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard

9
libavutil/x86/cpu.c
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@ -133,6 +133,15 @@ int ff_get_cpu_flags_x86(void)
rval & AV_CPU_FLAG_SSE2 && !(ecx & 0x00000040)) {
rval |= AV_CPU_FLAG_SSE2SLOW;
}
/* XOP and FMA4 use the AVX instruction coding scheme, so they can't be
* used unless the OS has AVX support. */
if (rval & AV_CPU_FLAG_AVX) {
if (ecx & 0x00000800)
rval |= AV_CPU_FLAG_XOP;
if (ecx & 0x00010000)
rval |= AV_CPU_FLAG_FMA4;
}
}
if (!strncmp(vendor.c, "GenuineIntel", 12)) {