Mercurial > cpython-lru_cache-weakref
diff Objects/floatobject.c @ 38293:688f25757104 legacy-trunk
Added a new macro, Py_IS_FINITE(X). On windows there is an intrinsic for this and it is more efficient than to use !Py_IS_INFINITE(X) && !Py_IS_NAN(X). No change on other platforms
| author | Kristján Valur Jónsson <kristjan@ccpgames.com> |
|---|---|
| date | Thu, 25 May 2006 15:53:30 +0000 |
| parents | 20cb13bdf1f0 |
| children | d5fa4afd6620 |
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--- a/Objects/floatobject.c Thu May 25 15:49:45 2006 +0000 +++ b/Objects/floatobject.c Thu May 25 15:53:30 2006 +0000 @@ -384,7 +384,7 @@ if (PyFloat_Check(w)) j = PyFloat_AS_DOUBLE(w); - else if (Py_IS_INFINITY(i) || Py_IS_NAN(i)) { + else if (!Py_IS_FINITE(i)) { if (PyInt_Check(w) || PyLong_Check(w)) /* If i is an infinity, its magnitude exceeds any * finite integer, so it doesn't matter which int we @@ -802,10 +802,7 @@ * bug; we let that slide in math.pow() (which currently * reflects all platform accidents), but not for Python's **. */ - if (iv == -1.0 && !Py_IS_INFINITY(iw) && iw == iw) { - /* XXX the "iw == iw" was to weed out NaNs. This - * XXX doesn't actually work on all platforms. - */ + if (iv == -1.0 && Py_IS_FINITE(iw)) { /* Return 1 if iw is even, -1 if iw is odd; there's * no guarantee that any C integral type is big * enough to hold iw, so we have to check this