fp_div64
fp_div64(quot, rem, dest->mant.m32[0], 0, src->mant.m32[0]);
fp_div64(quot, rem, dest->mant.m32[0], 0, src->mant.m32[0]);
fp_div64(fix, dummy, fix, 0, dummy);
fp_div64(first, rem, 0, src->mant.m32[1], div->mant.m32[0]);
fp_div64(first, rem, src->mant.m32[0], src->mant.m32[1], div->mant.m32[0]);