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Re: [PATCH] PowerPC: stpcpy optimization for PPC64/POWER7
- From: Richard Henderson <rth at twiddle dot net>
- To: munroesj at us dot ibm dot com
- Cc: Steven Munroe <munroesj at linux dot vnet dot ibm dot com>, Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>, libc-alpha at sourceware dot org
- Date: Wed, 18 Sep 2013 10:21:58 -0700
- Subject: Re: [PATCH] PowerPC: stpcpy optimization for PPC64/POWER7
- Authentication-results: sourceware.org; auth=none
- References: <523715EE dot 9070408 at linux dot vnet dot ibm dot com> <20130917061516 dot GA30130 at bubble dot grove dot modra dot org> <5239B9FE dot 4090506 at linux dot vnet dot ibm dot com> <5239CC7B dot 5010804 at twiddle dot net> <1379523152 dot 4899 dot 10 dot camel at spokane1 dot rchland dot ibm dot com>
On 09/18/2013 09:52 AM, Steven Munroe wrote:
> With unaligned load/stores we have to worry about crossing page
> boundaries and perhaps a segfault.
No we don't. The unaligned load/store is for the *last* one only,
when we know exactly where the last byte to be stored is located.
Please re-read the whole thread, not just pick out one word.
> Also I would like the see the scrollpipe trace that backs up you
> assertion.
Huh?
r~