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x86: add detection for FMA3 instruction set

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Based on x264 code

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2014-02-22 04:54:01 +00:00 committed by Janne Grunau
parent 10b0161d78
commit 1b932eb150
5 changed files with 16 additions and 1 deletions
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5
configure vendored
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@ -271,6 +271,7 @@ Optimization options (experts only):
--disable-sse42 disable SSE4.2 optimizations
--disable-avx disable AVX optimizations
--disable-xop disable XOP optimizations
--disable-fma3 disable FMA3 optimizations
--disable-fma4 disable FMA4 optimizations
--disable-avx2 disable AVX2 optimizations
--disable-armv5te disable armv5te optimizations
@ -1254,6 +1255,7 @@ ARCH_EXT_LIST_X86='
avx2
cpunop
xop
fma3
fma4
i686
mmx
@ -1578,6 +1580,7 @@ sse4_deps="ssse3"
sse42_deps="sse4"
avx_deps="sse42"
xop_deps="avx"
fma3_deps="avx"
fma4_deps="avx"
avx2_deps="avx"
@ -3761,6 +3764,7 @@ EOF
check_yasm "movbe ecx, [5]" && enable yasm ||
die "yasm/nasm not found or too old. Use --disable-yasm for a crippled build."
check_yasm "vpmacsdd xmm0, xmm1, xmm2, xmm3" || disable xop_external
check_yasm "vfmadd132ps ymm0, ymm1, ymm2" || disable fma3_external
check_yasm "vfmaddps ymm0, ymm1, ymm2, ymm3" || disable fma4_external
check_yasm "CPU amdnop" || disable cpunop
fi
@ -4294,6 +4298,7 @@ if enabled x86; then
echo "SSSE3 enabled ${ssse3-no}"
echo "AVX enabled ${avx-no}"
echo "XOP enabled ${xop-no}"
echo "FMA3 enabled ${fma3-no}"
echo "FMA4 enabled ${fma4-no}"
echo "i686 features enabled ${i686-no}"
echo "CMOV is fast ${fast_cmov-no}"

3
libavutil/cpu.c
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@ -87,6 +87,7 @@ int av_parse_cpu_flags(const char *s)
#define CPUFLAG_SSE42 (AV_CPU_FLAG_SSE42 | CPUFLAG_SSE4)
#define CPUFLAG_AVX (AV_CPU_FLAG_AVX | CPUFLAG_SSE42)
#define CPUFLAG_XOP (AV_CPU_FLAG_XOP | CPUFLAG_AVX)
#define CPUFLAG_FMA3 (AV_CPU_FLAG_FMA3 | CPUFLAG_AVX)
#define CPUFLAG_FMA4 (AV_CPU_FLAG_FMA4 | CPUFLAG_AVX)
#define CPUFLAG_AVX2 (AV_CPU_FLAG_AVX2 | CPUFLAG_AVX)
static const AVOption cpuflags_opts[] = {
@ -107,6 +108,7 @@ int av_parse_cpu_flags(const char *s)
{ "sse4.2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_SSE42 }, .unit = "flags" },
{ "avx" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX }, .unit = "flags" },
{ "xop" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_XOP }, .unit = "flags" },
{ "fma3" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA3 }, .unit = "flags" },
{ "fma4" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_FMA4 }, .unit = "flags" },
{ "avx2" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_AVX2 }, .unit = "flags" },
{ "3dnow" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPUFLAG_3DNOW }, .unit = "flags" },
@ -204,6 +206,7 @@ static const struct {
{ AV_CPU_FLAG_SSE42, "sse4.2" },
{ AV_CPU_FLAG_AVX, "avx" },
{ AV_CPU_FLAG_XOP, "xop" },
{ AV_CPU_FLAG_FMA3, "fma3" },
{ AV_CPU_FLAG_FMA4, "fma4" },
{ AV_CPU_FLAG_3DNOW, "3dnow" },
{ AV_CPU_FLAG_3DNOWEXT, "3dnowext" },

1
libavutil/cpu.h
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@ -49,6 +49,7 @@
#define AV_CPU_FLAG_FMA4 0x0800 ///< Bulldozer FMA4 functions
#define AV_CPU_FLAG_CMOV 0x1000 ///< i686 cmov
#define AV_CPU_FLAG_AVX2 0x8000 ///< AVX2 functions: requires OS support even if YMM registers aren't used
#define AV_CPU_FLAG_FMA3 0x10000 ///< Haswell FMA3 functions
#define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard

5
libavutil/x86/cpu.c
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@ -131,8 +131,11 @@ int ff_get_cpu_flags_x86(void)
if ((ecx & 0x18000000) == 0x18000000) {
/* Check for OS support */
xgetbv(0, eax, edx);
if ((eax & 0x6) == 0x6)
if ((eax & 0x6) == 0x6) {
rval |= AV_CPU_FLAG_AVX;
if (ecx & 0x00001000)
rval |= AV_CPU_FLAG_FMA3;
}
}
#if HAVE_AVX2
if (max_std_level >= 7) {

3
libavutil/x86/cpu.h
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@ -38,6 +38,7 @@
#define X86_SSE42(flags) CPUEXT(flags, SSE42)
#define X86_AVX(flags) CPUEXT(flags, AVX)
#define X86_XOP(flags) CPUEXT(flags, XOP)
#define X86_FMA3(flags) CPUEXT(flags, FMA3)
#define X86_FMA4(flags) CPUEXT(flags, FMA4)
#define X86_AVX2(flags) CPUEXT(flags, AVX2)
@ -53,6 +54,7 @@
#define EXTERNAL_SSE42(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, SSE42)
#define EXTERNAL_AVX(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, AVX)
#define EXTERNAL_XOP(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, XOP)
#define EXTERNAL_FMA3(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, FMA3)
#define EXTERNAL_FMA4(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, FMA4)
#define EXTERNAL_AVX2(flags) CPUEXT_SUFFIX(flags, _EXTERNAL, AVX2)
@ -68,6 +70,7 @@
#define INLINE_SSE42(flags) CPUEXT_SUFFIX(flags, _INLINE, SSE42)
#define INLINE_AVX(flags) CPUEXT_SUFFIX(flags, _INLINE, AVX)
#define INLINE_XOP(flags) CPUEXT_SUFFIX(flags, _INLINE, XOP)
#define INLINE_FMA3(flags) CPUEXT_SUFFIX(flags, _INLINE, FMA3)
#define INLINE_FMA4(flags) CPUEXT_SUFFIX(flags, _INLINE, FMA4)
#define INLINE_AVX2(flags) CPUEXT_SUFFIX(flags, _INLINE, AVX2)