From e56ed9ba1513b3719ce0fe8b85da6b3367d7da64 Mon Sep 17 00:00:00 2001 From: Tim Peters Date: Thu, 6 Sep 2001 21:59:14 +0000 Subject: long_true_divide: reliably force underflow to 0 when the denominator has more bits than the numerator than can be counted in a C int (yes, that's unlikely, and no, I'm not adding a test case with a 2 gigabit long). --- Objects/longobject.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Objects/longobject.c b/Objects/longobject.c index e9e408d..c7608aa 100644 --- a/Objects/longobject.c +++ b/Objects/longobject.c @@ -1605,6 +1605,8 @@ long_true_divide(PyObject *v, PyObject *w) aexp -= bexp; if (aexp > INT_MAX / SHIFT) goto overflow; + else if (aexp < -(INT_MAX / SHIFT)) + return PyFloat_FromDouble(0.0); /* underflow to 0 */ errno = 0; ad = ldexp(ad, aexp * SHIFT); if (Py_OVERFLOWED(ad)) /* ignore underflow to 0.0 */ -- cgit v0.12