IEEE754_DOUBLE_BIAS
*expt = (int) u.ieee.exponent - IEEE754_DOUBLE_BIAS;
u.ieee.exponent = expt + IEEE754_DOUBLE_BIAS;
exponent = IEEE754_DOUBLE_BIAS - 1;
else if (exponent >= IEEE754_DOUBLE_BIAS)
exponent -= IEEE754_DOUBLE_BIAS;
exponent = -(exponent - IEEE754_DOUBLE_BIAS);
temp.ieee.exponent = IEEE754_DOUBLE_BIAS;