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