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Merge branch 'master' of git://github.com/lioncash/RetroArch

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Themaister 2013-12-29 11:25:17 +01:00
commit 8d2222d3b5
1 changed files with 9 additions and 1 deletions
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10
performance.c
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@ -237,6 +237,13 @@ static void x86_cpuid(int func, int flags[4])
memset(flags, 0, 4 * sizeof(int));
#endif
}
static uint64_t _xgetbv(uint32_t index)
{
uint32_t eax, edx;
__asm__ __volatile__("xgetbv" : "=a"(eax), "=d"(edx) : "c"(index));
return ((uint64_t)edx << 32) | eax;
}
#endif
uint64_t rarch_get_cpu_features(void)
@ -273,7 +280,8 @@ uint64_t rarch_get_cpu_features(void)
cpu |= RETRO_SIMD_SSSE3;
const int avx_flags = (1 << 27) | (1 << 28);
if ((flags[2] & avx_flags) == avx_flags)
const bool xcr_bit_set = ((_xgetbv(0) & 0x6) == 0x6);
if ((flags[2] & avx_flags) == avx_flags && xcr_bit_set)
cpu |= RETRO_SIMD_AVX;
RARCH_LOG("[CPUID]: MMX: %u\n", !!(cpu & RETRO_SIMD_MMX));