1176998Sphk/* Check if the OS supports executing AVX instructions. */ 2330449Seadler 3330449Seadler#define XCR_XFEATURE_ENABLED_MASK 0x0 4176998Sphk 5176998Sphk#define XSTATE_FP 0x1 6176998Sphk#define XSTATE_SSE 0x2 7176998Sphk#define XSTATE_YMM 0x4 8176998Sphk 9176998Sphkstatic int 10176998Sphkavx_os_support (void) 11176998Sphk{ 12176998Sphk unsigned int eax, edx; 13176998Sphk unsigned int ecx = XCR_XFEATURE_ENABLED_MASK; 14176998Sphk 15176998Sphk __asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx)); 16176998Sphk 17176998Sphk return (eax & (XSTATE_SSE | XSTATE_YMM)) == (XSTATE_SSE | XSTATE_YMM); 18176998Sphk} 19176998Sphk