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[Patch libstdc++] Rewrite cpu/generic/atomic_word.h

From: Ramana Radhakrishnan <ramana dot radhakrishnan at foss dot arm dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, "libstdc++ at gcc dot gnu dot org" <libstdc++ at gcc dot gnu dot org>
Date: Fri, 22 May 2015 12:37:21 +0100
Subject: [Patch libstdc++] Rewrite cpu/generic/atomic_word.h
Authentication-results: sourceware.org; auth=none

Hi,

While writing atomic_word.h for the ARM backend to fix PR target/66200 Ithought it would make more sense to write it all up with atomicprimitives instead of providing various fragile bits of inlineasssembler. Thus this patch came about. I intend to ask for aspecialized version of this to be applied for the ARM backend in anycase after testing completes.

If this goes in as a cleanup I expect all the ports to be deleting theiratomic_word.h implementation in the various ports directories and I'llfollow up with patches asking port maintainers to test and apply foreach of the individual cases if this is deemed to be good enough.

Currently tested on AArch64 (without the other patch for PRtarget/66200) and tested in my tree as part of testing for the ARMbackend on arm-linux-gnueabihf with no regressions.


Ok to apply ?


regards
Ramana



* config/cpu/generic/atomic_word.h: Rewrite using atomics.

Attachment: rewrite-generic.txt
Description: Text document

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- Re: [Patch libstdc++] Rewrite cpu/generic/atomic_word.h
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