fmax
#define fmax(x, y) __tg_simple2(x, y, fmax)
double fmax(double, double) __pure2;
__weak_reference(fmax, fmaxl);
TEST(fmax, double, big, small, expected_max, rmode);
TEST(fmax, double, small, big, expected_max, rmode);
double stddev = sqrt(fmax(0, tsumsq / num - avg * avg));
TGMACRO_REAL_REAL(fmax)
PASS_REAL_REAL_ARG_REAL_RET(fmax));