T_LIBM_MINUS_INF
T_LIBM_MINUS_INF, T_LIBM_PLUS_INF,
{ T_LIBM_MINUS_INF, -M_PI / 2 },
#ifdef T_LIBM_MINUS_INF
T_LIBM_CHECK_PLUS_ZERO(0, exp2, T_LIBM_MINUS_INF);
T_LIBM_CHECK_PLUS_ZERO(0, exp2f, T_LIBM_MINUS_INF);