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Re: gcc-4.3 considers unaligned accesses on X86 as undefined
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From:
Alan Cox <alan@...>
To: Török <edwintorok@...>
Cc: Thomas Gleixner mingo@redhat.com <tglx@...>, H. Peter Anvin <hpa@...>, Ingo Molnar <mingo@...>, Linux Kernel <linux-kernel@...>
Subject:
Re: gcc-4.3 considers unaligned accesses on X86 as undefined
Date: Tuesday, March 25, 2008 - 5:11 pm
On Tue, 25 Mar 2008 22:51:09 +0200 Török Edwin <edwintorok@gmail.com> wrote:
quoted text
> 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 --
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Messages in current thread:
gcc-4.3 considers unaligned accesses on X86 as undefined
, Török Edwin
, (Tue Mar 25, 4:51 pm)
Re: gcc-4.3 considers unaligned accesses on X86 as undefined
, Andi Kleen
, (Wed Mar 26, 1:30 am)
Re: gcc-4.3 considers unaligned accesses on X86 as undefined
, Alan Cox
, (Tue Mar 25, 5:11 pm)
Re: gcc-4.3 considers unaligned accesses on X86 as undefined
, H. Peter Anvin
, (Tue Mar 25, 4:56 pm)
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