linux-kernel - Re: [PATCH] x86: Use __builtin_memset and __builtin

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Message-ID: <4AC65CC9.4000105@zytor.com>
Date:	Fri, 02 Oct 2009 13:04:25 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...x.de,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy

On 10/02/2009 12:19 PM, Andi Kleen wrote:
> 
> I tried this some time ago, but it it generates bad code on some 
> gcc 3 versions.
> 
> You really need to test such kind of changes on a wide variety
> of compilers, not assuming everyone uses the same version as you.
> 

The version that went in is for gcc 4 only.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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