From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Török Edwin" <edwintorok@gmail.com>
Cc: "Thomas Gleixner mingo@redhat.com" <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: gcc-4.3 considers unaligned accesses on X86 as undefined
Date: Tue, 25 Mar 2008 21:11:02 +0000 [thread overview]
Message-ID: <20080325211102.44aa7ce7@core> (raw)
In-Reply-To: <47E965BD.7010604@gmail.com>
On Tue, 25 Mar 2008 22:51:09 +0200
Török Edwin <edwintorok@gmail.com> wrote:
> Hello x86 architecture maintainers,
>
> GCC-4.3 now considers that it is undefined behaviour to access memory
> through an int* that is not aligned to sizeof(int).
> At -O3 it generates vectorized code
FPU/MMX/SSE are not available or usable for the kernel anyway fortunately
in this case.
Alan
next prev parent reply other threads:[~2008-03-25 21:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 20:51 gcc-4.3 considers unaligned accesses on X86 as undefined Török Edwin
2008-03-25 20:56 ` H. Peter Anvin
2008-03-25 21:11 ` Alan Cox [this message]
2008-03-26 5:30 ` Andi Kleen
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