diff options
| author | Mans Rullgard <mans@mansr.com> | 2011-02-16 02:39:42 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-02-20 13:20:42 +0000 |
| commit | 87f1355f9b4fc11414d0e6a91404203c2745f89f (patch) | |
| tree | 8e8699378866533bc3e7ce8dfd0d33efa7d4e8fc /libavutil | |
| parent | 74d6871d6244865b5863a01c3dab16a2f06a1706 (diff) | |
x86: check for AVX support
This adds configure and runtime checks for AVX support on x86 CPUs.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/cpu.c | 3 | ||||
| -rw-r--r-- | libavutil/cpu.h | 1 | ||||
| -rw-r--r-- | libavutil/x86/cpu.c | 12 |
3 files changed, 15 insertions, 1 deletions
diff --git a/libavutil/cpu.c b/libavutil/cpu.c index 1e034914de..3459ce435d 100644 --- a/libavutil/cpu.c +++ b/libavutil/cpu.c @@ -44,7 +44,7 @@ int main(void) int cpu_flags = av_get_cpu_flags(); printf("cpu_flags = 0x%08X\n", cpu_flags); - printf("cpu_flags = %s%s%s%s%s%s%s%s%s%s%s%s\n", + printf("cpu_flags = %s%s%s%s%s%s%s%s%s%s%s%s%s\n", #if ARCH_ARM cpu_flags & AV_CPU_FLAG_IWMMXT ? "IWMMXT " : "", #elif ARCH_PPC @@ -60,6 +60,7 @@ int main(void) cpu_flags & AV_CPU_FLAG_SSSE3 ? "SSSE3 " : "", cpu_flags & AV_CPU_FLAG_SSE4 ? "SSE4.1 " : "", cpu_flags & AV_CPU_FLAG_SSE42 ? "SSE4.2 " : "", + cpu_flags & AV_CPU_FLAG_AVX ? "AVX " : "", cpu_flags & AV_CPU_FLAG_3DNOW ? "3DNow " : "", cpu_flags & AV_CPU_FLAG_3DNOWEXT ? "3DNowExt " : ""); #endif diff --git a/libavutil/cpu.h b/libavutil/cpu.h index 71cc26529a..d60e062e19 100644 --- a/libavutil/cpu.h +++ b/libavutil/cpu.h @@ -36,6 +36,7 @@ #define AV_CPU_FLAG_SSSE3 0x0080 ///< Conroe SSSE3 functions #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_IWMMXT 0x0100 ///< XScale IWMMXT #define AV_CPU_FLAG_ALTIVEC 0x0001 ///< standard diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c index 6fa4a46567..2caac2fb23 100644 --- a/libavutil/x86/cpu.c +++ b/libavutil/x86/cpu.c @@ -35,6 +35,9 @@ "=c" (ecx), "=d" (edx)\ : "0" (index)); +#define xgetbv(index,eax,edx) \ + __asm__ ("xgetbv" : "=a"(eax), "=d"(edx) : "c" (index)) + /* Function to test if multimedia instructions are supported... */ int ff_get_cpu_flags_x86(void) { @@ -93,6 +96,15 @@ int ff_get_cpu_flags_x86(void) rval |= AV_CPU_FLAG_SSE4; if (ecx & 0x00100000 ) rval |= AV_CPU_FLAG_SSE42; +#if HAVE_AVX + /* Check OXSAVE and AVX bits */ + if ((ecx & 0x18000000) == 0x18000000) { + /* Check for OS support */ + xgetbv(0, eax, edx); + if ((eax & 0x6) == 0x6) + rval |= AV_CPU_FLAG_AVX; + } +#endif #endif ; } |