gcc/testsuite/gcc.target/i386/avx512f-os-support.h

   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
  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 }