Test for AES NI in the CPU.

test.c

#include <stdio.h>

int main (int argc, char **argv)
{
        unsigned int eax, ebx, ecx, edx;

        asm(
		"xchg{l}\t{%%}ebx, %1\n\t"				\
		"cpuid\n\t"						\
		"xchg{l}\t{%%}ebx, %1\n\t"				\
		: "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)	\
		: "0" (1)
        );

        if (ecx & (1 << 25))
                printf("AES supported.\n");
        else
                printf("No AES support.\n");

        return 0;
}