iy0
int iy0, iy1, iy2, iy3, iy4;
iy0 = ival0 & 0x007fffff;
ival0 = (iy0 + 0x20000) & 0xfffc0000;
iy0 = iy0 - ival0;
yy0 = (double) iy0 * __TBL_logf[i0 + 1];