DOUBLE_BIAS
u.exponent = dd.f.msw.exponent - DOUBLE_BIAS;
u.exponent = dd.f.msw.exponent - DOUBLE_BIAS;
pf->bexponent = x->f.msw.exponent - DOUBLE_BIAS - 52;
pu->exponent += DOUBLE_BIAS;
pu->exponent += DOUBLE_BIAS;
pu->exponent = -DOUBLE_BIAS-3;
(*pu).exponent = x.exponent - DOUBLE_BIAS;