EXP_UNDER
if (exponent16(dest) <= EXP_UNDER - 63) {
#define isdenormal(ptr) (exponent(ptr) == EXP_BIAS+EXP_UNDER)
if (exp == EXP_BIAS + EXP_UNDER)
if ((exponent16(&tmp) <= EXP_UNDER) && (tag != TAG_Zero)
} else if ((exponent16(&tmp) > EXP_UNDER) || (tag == TAG_Zero)) {
if (exponent(dest) <= EXP_UNDER)
FPU_REG const CONST_Z = MAKE_REG(POS, EXP_UNDER, 0x0, 0x0);
if (exponent16(x) == EXP_UNDER) {