diff options
Diffstat (limited to 'Modules/mathmodule.c')
| -rw-r--r-- | Modules/mathmodule.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c index 4730680..873059f 100644 --- a/Modules/mathmodule.c +++ b/Modules/mathmodule.c @@ -291,9 +291,9 @@ loghelper(PyObject* arg, double (*func)(double), char *funcname) "math domain error"); return NULL; } - /* Value is ~= x * 2**(e*SHIFT), so the log ~= - log(x) + log(2) * e * SHIFT. - CAUTION: e*SHIFT may overflow using int arithmetic, + /* Value is ~= x * 2**(e*PyLong_SHIFT), so the log ~= + log(x) + log(2) * e * PyLong_SHIFT. + CAUTION: e*PyLong_SHIFT may overflow using int arithmetic, so force use of double. */ x = func(x) + (e * (double)PyLong_SHIFT) * func(2.0); return PyFloat_FromDouble(x); |