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Hopefully more correct rounding in long.__truediv__?

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This commit is contained in:
K. Lange 2024-02-28 20:56:26 +09:00
parent 55debe7570
commit cfe34614da
1 changed files with 12 additions and 2 deletions
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14
src/obj_long.c
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@ -1395,10 +1395,20 @@ static KrkValue _krk_long_truediv(KrkLong * _top, KrkLong * _bottom) {
}
#undef NEEDED_BITS
if (exp < 1) quot >>= -exp + 1;
if ((quot & 1) && !(quot & 2)) {
if (rem.width != 0) quot += 2;
} else if (quot & 1) quot += 2;
quot &= ~1;
if (exp < 1) quot <<= -exp + 1;
if (quot & (1ULL << 54)) {
exp++;
quot = (1ULL << 53);
}
krk_long_clear_many(&rem, &top, &bottom, NULL);
/* Handle rounding? This is probably wrong. */
quot = (quot + 1) >> 1;
quot >>= 1;
if (exp > 2046) {
/* Saturated maximum, but not infinity */
quot = 0x1fffffffffffffULL;