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[Bug libstdc++/12496] wrong result for __atomic_add(&value, -1) when using -O0 -m64
- From: "davem at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Dec 2003 01:21:08 -0000
- Subject: [Bug libstdc++/12496] wrong result for __atomic_add(&value, -1) when using -O0 -m64
- References: <20031003073054.12496.patrick.frants@quintiq.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From davem at gcc dot gnu dot org 2003-12-06 01:21 -------
The bug is that the __atomic_{inc,dec} routines were not properly
sign extending the __val argument from an int to an _Atomic_word.
I'm going to attach a patch I am testing right now.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12496