#include #include "cpuid.h" static void fma_test (void); static void __attribute__ ((noinline)) do_test (void) { fma_test (); } int main () { unsigned int eax, ebx, ecx, edx; if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx)) return 0; /* Run FMA test only if host has FMA support. */ if (ecx & bit_FMA) do_test (); return 0; }