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| author | Mark Dickinson <dickinsm@gmail.com> | 2009-01-04 12:29:36 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2009-01-04 12:29:36 (GMT) |
| commit | 04b272336d8f4842d752449427ebef608dfcaca3 (patch) | |
| tree | 52a5448d9c9435d6c1edfba8c0235153a76c18f5 /pyconfig.h.in | |
| parent | d81780b8b0de6f0a191335da1ca1a040626bf97e (diff) | |
| download | cpython-04b272336d8f4842d752449427ebef608dfcaca3.zip cpython-04b272336d8f4842d752449427ebef608dfcaca3.tar.gz cpython-04b272336d8f4842d752449427ebef608dfcaca3.tar.bz2 | |
Add autoconf test to detect x87-style double rounding, as described in
issue #2937. This information can be helpful for diagnosing platform-
specific problems in math and cmath. The result of the test also
serves as a fairly reliable indicator of whether the x87 floating-point
instructions (as opposed to SSE2) are in use on Intel x86/x86_64 systems.
Diffstat (limited to 'pyconfig.h.in')
| -rw-r--r-- | pyconfig.h.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pyconfig.h.in b/pyconfig.h.in index 4075d14..e3fb0a5 100644 --- a/pyconfig.h.in +++ b/pyconfig.h.in @@ -983,6 +983,9 @@ first (like Motorola and SPARC, unlike Intel and VAX). */ #undef WORDS_BIGENDIAN +/* Define if arithmetic is subject to x87-style double rounding issue */ +#undef X87_DOUBLE_ROUNDING + /* Define to 1 if on AIX 3. System headers sometimes define this. We just want to avoid a redefinition error message. */ |