#define COMPCERT_NO_FP_MACROS #include #include #include int main(int argc, char **argv) { if (argc < 4) return 1; double x = strtod(argv[1], NULL); double y = strtod(argv[2], NULL); double z = strtod(argv[3], NULL); printf("%g %g %g\n", __builtin_fma(x, y, z), fma(x, y, z), x*y + z); printf("%g %g %g\n", __builtin_fma(-x, y, z), fma(-x, y, z), (-x)*y + z); return 0; }