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[PATCH] Use memcpy in memmove when possible

From: Maxim Kuvyrkov <maxim at codesourcery dot com>
To: GLIBC Devel <libc-alpha at sourceware dot org>
Cc: "Joseph S. Myers" <joseph at codesourcery dot com>
Date: Sat, 1 Sep 2012 20:16:03 +1200
Subject: [PATCH] Use memcpy in memmove when possible

Several architectures, e.g., MIPS, have well-optimized memcpy implementations, which can also be used for either forward or backward direction in memmove.  This patch adds an option for ports to define MEMCPY_OK_FOR_{FWD,BWD}_MEMMOVE macros to make generic memmove use memcpy when safe to do so.

This patch speeds up forward-direction memmove on MIPS by 50%.  Tested with no regressions.

OK to apply?

--
Maxim Kuvyrkov
CodeSourcery / Mentor Graphics

Attachment: 0002-Use-memcpy-in-memmove-when-possible.patch
Description: Binary data

Follow-Ups:
- Re: [PATCH] Use memcpy in memmove when possible
  - From: Andreas Schwab
- Re: [PATCH] Use memcpy in memmove when possible
  - From: Siddhesh Poyarekar
- Re: [PATCH] Use memcpy in memmove when possible
  - From: H.J. Lu
- Re: [PATCH] Use memcpy in memmove when possible
  - From: Roland McGrath

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