Commit Graph

14 Commits

Author SHA1 Message Date
Niklas Fiekas 794e7d1ab2
bpo-29782: Consolidate _Py_Bit_Length() (GH-20739)
In GH-2866, _Py_Bit_Length() was added to pymath.h for lack of a better
location. GH-20518 added a more appropriate header file for bit utilities. It
also shows how to properly use intrinsics. This allows reconsidering bpo-29782.

* Move the function to the new header.
* Changed return type to match __builtin_clzl() and reviewed usage.
* Use intrinsics where available.
* Pick a fallback implementation suitable for inlining.
2020-06-15 14:33:48 +02:00
Niklas Fiekas c5b79003f5 bpo-31031: Unify duplicate bits_in_digit and bit_length (GH-2866)
Add _Py_bit_length() to unify duplicate bits_in_digit() and bit_length().
2020-01-16 15:09:19 +01:00
Gregory P. Smith 3015fb8ce4
bpo-35214: Add _Py_ prefix to MEMORY_SANITIZER def. (GH-10503)
Rename our new MEMORY_SANITIZER define to _Py_MEMORY_SANITIZER.
Project based C Preprocessor namespacing at its finest. :P
2018-11-12 22:01:22 -08:00
Gregory P. Smith 1584a00815
bpo-35214: Initial clang MemorySanitizer support (GH-10479)
Adds configure flags for msan and ubsan builds to make it easier to enable.
These also encode the detail that address sanitizer and memory sanitizer
should disable pymalloc.

Define MEMORY_SANITIZER when appropriate at build time and adds workarounds
to existing code to mark things as initialized where the sanitizer is otherwise unable to
determine that.  This lets our build succeed under the memory sanitizer.  not all tests
pass without sanitizer failures yet but we're in pretty good shape after this.
2018-11-12 12:07:14 -08:00
Yury Selivanov 614bfcc953 Issue 24366: Indent code (thanks to li4ick for reporting). 2015-06-02 18:53:46 -04:00
Antoine Pitrou f95a1b3c53 Recorded merge of revisions 81029 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines

  Untabify C files. Will watch buildbots.
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2010-05-09 15:52:27 +00:00
Mark Dickinson f371859a4f Merged revisions 76978 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r76978 | mark.dickinson | 2009-12-21 15:22:00 +0000 (Mon, 21 Dec 2009) | 3 lines

  Issue #7518:  Move substitute definitions of C99 math functions from
  pymath.c to Modules/_math.c.
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2009-12-21 15:27:41 +00:00
Mark Dickinson 7abf8d4066 The SSE2 detection and enabling could potentially cause
problems for binary distributions of Python in situations
where the build machine has SSE2 but the target machine
does not.

Therefore, don't enable SSE2 instructions automatically on x86.
2009-04-18 20:17:52 +00:00
Mark Dickinson 23b6286e8f Merged revisions 71705 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r71705 | mark.dickinson | 2009-04-18 15:13:43 +0100 (Sat, 18 Apr 2009) | 2 lines

  copysign shouldn't be declared as static in pymath.c
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2009-04-18 14:14:48 +00:00
Mark Dickinson f253786a80 Add check for C99 round function to configure, and define
a fallback function if round doesn't exist.
2009-04-18 13:58:18 +00:00
Mark Dickinson b08a53a99d Issue #1580: use short float repr where possible.
- incorporate and adapt David Gay's dtoa and strtod
   into the Python core
 - on platforms where we can use Gay's code (almost
   all!), repr(float) is based on the shortest
   sequence of decimal digits that rounds correctly.
 - add sys.float_repr_style attribute to indicate
   whether we're using Gay's code or not
 - add autoconf magic to detect and enable SSE2
   instructions on x86/gcc
 - slight change to repr and str:  repr switches
   to exponential notation at 1e16 instead of
   1e17, str switches at 1e11 instead of 1e12
2009-04-16 19:52:09 +00:00
Mark Dickinson 87ec0855c6 Merged revisions 69459 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r69459 | mark.dickinson | 2009-02-09 14:18:43 +0000 (Mon, 09 Feb 2009) | 3 lines

  Issue #4575: fix Py_IS_INFINITY macro to work correctly on x87 FPUs.
  It now forces its argument to double before testing for infinity.
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2009-02-09 17:15:59 +00:00
Andrew MacIntyre 4561257c34 Merged revisions 66552-66553 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r66552 | andrew.macintyre | 2008-09-23 00:10:54 +1000 (Tue, 23 Sep 2008) | 5 lines

  should use macro'ed symbols not direct

  Part of source_os2emx.patch in issue 3868
  Reviewed by Amaury Forgeot d'Arc
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  r66553 | andrew.macintyre | 2008-09-23 00:11:41 +1000 (Tue, 23 Sep 2008) | 5 lines

  any platform without HAVE_LOG1P should have DBL_EPSILON in <float.h>

  Part of source_os2emx.patch in issue 3868
  Reviewed by Amaury Forgeot d'Arc
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2008-09-22 14:49:01 +00:00
Christian Heimes 53876d9cd8 Merged revisions 62380,62382-62383 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r62380 | christian.heimes | 2008-04-19 01:13:07 +0200 (Sat, 19 Apr 2008) | 3 lines

  I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.

  The patch also adds acosh, asinh, atanh, log1p and copysign to all platforms. Finally it fixes differences between platforms like different results or exceptions for edge cases. Have fun :)
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  r62382 | christian.heimes | 2008-04-19 01:40:40 +0200 (Sat, 19 Apr 2008) | 2 lines

  Added new files to Windows project files
  More Windows related fixes are coming soon
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  r62383 | christian.heimes | 2008-04-19 01:49:11 +0200 (Sat, 19 Apr 2008) | 1 line

  Stupid me. Py_RETURN_NAN should actually return something ...
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2008-04-19 00:31:39 +00:00