/* Check if the OS supports executing AVX instructions. */ | |
#define XCR_XFEATURE_ENABLED_MASK 0x0 | |
#define XSTATE_FP 0x1 | |
#define XSTATE_SSE 0x2 | |
#define XSTATE_YMM 0x4 | |
static int | |
avx_os_support (void) | |
{ | |
unsigned int eax, edx; | |
unsigned int ecx = XCR_XFEATURE_ENABLED_MASK; | |
__asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx)); | |
return (eax & (XSTATE_SSE | XSTATE_YMM)) == (XSTATE_SSE | XSTATE_YMM); | |
} |