Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

bpo-45412: Update _Py_ADJUST_ERANGE1() comment (GH-28884) 

Copy the comment from the removed Py_OVERFLOWED() function.
This commit is contained in:
Victor Stinner 2021-10-11 23:07:41 +02:00 committed by GitHub
parent 1ebd798fdd
commit a9fe1a8e5b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
Include/internal/pycore_pymath.h
View File

@ -19,8 +19,15 @@ extern "C" {
* effect, we're trying to force a useful implementation of C89 errno
* behavior.
* Caution:
* This isn't reliable. See Py_OVERFLOWED comments.
* X and Y may be evaluated more than once.
* This isn't reliable. C99 no longer requires libm to set errno under
* any exceptional condition, but does require +- HUGE_VAL return
* values on overflow. A 754 box *probably* maps HUGE_VAL to a
* double infinity, and we're cool if that's so, unless the input
* was an infinity and an infinity is the expected result. A C89
* system sets errno to ERANGE, so we check for that too. We're
* out of luck if a C99 754 box doesn't map HUGE_VAL to +Inf, or
* if the returned result is a NaN, or if a C89 box returns HUGE_VAL
* in non-overflow cases.
*/
static inline void _Py_ADJUST_ERANGE1(double x)
{