* Peter Colberg <peter@colberg.org>, 2016-05-09, 13:33:
/* SSE2 */
#include <cpuid.h>
static int check_sse2() {
unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
__get_cpuid(1, &eax, &ebx, &ecx, &edx);
return edx & bit_SSE2 ? 1 : 0;
}
You can use __builtin_cpu_supports("sse2") instead of manually playing with CPUID.
Documentation: https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/X86-Built-in-Functions.html -- Jakub Wilk