LN2
ty##N = LN2 * (double) exp##N + __TBL_logf[i##N]; \
double LN2 = __TBL_logf[64]; /* log(2) = 0.6931471805599453094 */
ty0 = LN2 * (double) exp0 + __TBL_logf[i0];
ty1 = LN2 * (double) exp1 + __TBL_logf[i1];
ty2 = LN2 * (double) exp2 + __TBL_logf[i2];
ty3 = LN2 * (double) exp3 + __TBL_logf[i3];
ty4 = LN2 * (double) exp4 + __TBL_logf[i4];