#include #include "cpuid.h" static void fma4_test (void); static void __attribute__ ((noinline)) do_test (void) { fma4_test (); } int main () { unsigned int eax, ebx, ecx, edx; if (!__get_cpuid (0x80000001, &eax, &ebx, &ecx, &edx)) return 0; /* Run FMA4 test only if host has FMA4 support. */ if (ecx & bit_FMA4) do_test (); return 0; }