1 /* Check if the OS supports executing AVX512F instructions.  */
2 
3 #define XCR_XFEATURE_ENABLED_MASK	0x0
4 
5 #define XSTATE_FP	0x1
6 #define XSTATE_SSE	0x2
7 #define XSTATE_YMM	0x4
8 #define XSTATE_OPMASK	0x20
9 #define XSTATE_ZMM	0x40
10 #define XSTATE_HI_ZMM	0x80
11 
12 static int
avx512f_os_support(void)13 avx512f_os_support (void)
14 {
15   unsigned int eax, edx;
16   unsigned int ecx = XCR_XFEATURE_ENABLED_MASK;
17   unsigned int mask = XSTATE_SSE | XSTATE_YMM | XSTATE_OPMASK
18 		      | XSTATE_ZMM | XSTATE_HI_ZMM;
19 
20   __asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx));
21 
22   return ((eax & mask) == mask);
23 }
24