From: Nicolas Pitre <nico@cam.org>
Date: Tue, 10 Jan 2006 19:48:02 +0000 (+0000)
Subject: [ARM] 3252/1: help gcc do the best with ___arch__swab32
X-Git-Tag: v2.6.16-rc1~179^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3e49436867e6c7acc1b5eed21d30c88d156825b;p=pandora-kernel.git

[ARM] 3252/1: help gcc do the best with ___arch__swab32

Patch from Nicolas Pitre

Depending on your gcc version, the current C-only implementation would
produce suboptimal code, ranging from a bad register selection forcing
an additional mov instruction to a failure to merge the eor and the ror
in a single instruction.  With a little help gcc always produces the
best code.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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