CTCaer/RetroArch
1
0
Fork 0
mirror of https://github.com/CTCaer/RetroArch.git synced 2025-01-18 17:04:34 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix checking for AVX support. We also need to check if the XCR bit is set as well.

Browse Source
This commit is contained in:
Lioncash 2013-12-22 18:22:26 -05:00
parent 9a15b3e66e
commit ad87e70455
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
performance.c
View File

@ -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)
@ -270,7 +277,8 @@ 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]: SSE: %u\n", !!(cpu & RETRO_SIMD_SSE));