else if (__builtin_cpu_supports("avx")) strcpy(instruction_set, "AVX");
else if (__builtin_cpu_supports("sse2")) strcpy(instruction_set, "SSE2");
else if (__builtin_cpu_supports("mmx")) strcpy(instruction_set, "MMX");
else if (__builtin_cpu_supports("avx")) strcpy(instruction_set, "AVX");
else if (__builtin_cpu_supports("sse2")) strcpy(instruction_set, "SSE2");
else if (__builtin_cpu_supports("mmx")) strcpy(instruction_set, "MMX");