lgammaf
float lgammaf(float);
PROTO_STD_DEPRECATED(lgammaf);
assert(isnan(lgammaf(NAN)));
assert(lgammaf(-HUGE_VALF) == HUGE_VALF && signgam == 1);
assert(lgammaf(HUGE_VALF) == HUGE_VALF && signgam == 1);
assert(lgammaf(-0.0F) == HUGE_VALF && signgam == -1);
assert(lgammaf(0.0F) == HUGE_VALF && signgam == 1);
assert(lgammaf(1.0F) == 0.0F && signgam == 1);
assert(fabsf(lgammaf(3.0F) - (float)M_LN2) < FLT_EPSILON && signgam == 1);