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x86/cpu: check for OS support before enabling AVX2

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AV_CPU_FLAG_AVX is enabled at this point only if there's OS support.

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2d9821a208)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
James Almer
2014-03-25 05:27:08 -03:00
committed by Michael Niedermayer
parent b40ab81d1f
commit 1103aec1df
1 changed files with 1 additions and 1 deletions
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2
libavutil/x86/cpu.c
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@@ -143,7 +143,7 @@ int ff_get_cpu_flags_x86(void)
if (max_std_level >= 7) { if (max_std_level >= 7) {
cpuid(7, eax, ebx, ecx, edx); cpuid(7, eax, ebx, ecx, edx);
#if HAVE_AVX2 #if HAVE_AVX2
if (ebx & 0x00000020) if ((rval & AV_CPU_FLAG_AVX) && (ebx & 0x00000020))
rval |= AV_CPU_FLAG_AVX2; rval |= AV_CPU_FLAG_AVX2;
#endif /* HAVE_AVX2 */ #endif /* HAVE_AVX2 */
/* BMI1/2 don't need OS support */ /* BMI1/2 don't need OS support */