COEFF_SCALE_SHIFT
exp = 14 - (exp - COEFF_SCALE_SHIFT);
man = coeff + (1 << (COEFF_SCALE_SHIFT - exp - 1));
*mantissa = man >> (COEFF_SCALE_SHIFT - exp);
exp = 14 - (exp - COEFF_SCALE_SHIFT);
man = coeff + (1 << (COEFF_SCALE_SHIFT - exp - 1));
*mantissa = man >> (COEFF_SCALE_SHIFT - exp);