Changeset 94fe43 in git for libpolys/misc/intvec.cc

Timestamp:

Jan 25, 2013, 10:09:01 PM (11 years ago)

Author:

Oleksandr Motsak <motsak@…>

Branches:

(u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')

Children:

39e070d960bd0ab6d36b34b34c868cd1085371e5

Parents:

5efd81570bd3d8921d3bf3272bb1214556bf665f

git-author:

Oleksandr Motsak <motsak@mathematik.uni-kl.de>2013-01-25 22:09:01+01:00

git-committer:

Oleksandr Motsak <motsak@mathematik.uni-kl.de>2013-01-28 18:21:51+01:00

Message:

Fix: (for 32-bit builds): libpolys/misc/intvec.cc should be compiled with "-fwrapv"

This option instructs the compiler to assume that signed arithmetic
overflow of addition, subtraction and multiplication wraps around
using twos-complement representation. This flag enables some
optimizations and disables others.

See http://gcc.gnu.org/onlinedocs/gcc-4.4.6/gcc/Code-Gen-Options.html

File:

• libpolys/misc/intvec.cc (modified) (3 diffs)

libpolys/misc/intvec.cc

@@ -8 +8 @@
 #define INTVEC_CC
 
+
 #include "config.h"
 #include <misc/auxiliary.h>
@@ -15 +16 @@
 #include <misc/options.h>
 #include <omalloc/omalloc.h>
+
+#pragma GCC push_options
+#pragma GCC optimize ("wrapv") 
 
 /*0 implementation*/
@@ -804 +808 @@
 }
 
+#pragma GCC pop_options
+
 #endif