Subject: -mstrict-align on powerpc
To: None <email@example.com>
From: Jason Thorpe <firstname.lastname@example.org>
Date: 03/15/2003 21:25:08
On Saturday, March 15, 2003, at 08:09 AM, Juergen Hannken-Illjes wrote:
> Module Name: src
> Committed By: hannken
> Date: Sat Mar 15 16:09:35 UTC 2003
> Modified Files:
> src/gnu/dist/toolchain/gcc/config/rs6000: netbsd.h
> Log Message:
> Add -mstrict-align to the CC1 default options.
> At least the 403 ports cannot handle unaligned access.
> Discussed with Jason Thorpe and Matt Thomas.
Hm. Maybe what we should do is default to -mstrict-align, but disable
-mstrict-align for -mcpu=foo where foo doesn't require strict alignment
(e.g. 603, 604, 750, etc.). All of those CPUs can do unaligned access
on integer loads/stores, right? Is it only the 403 that actually has
the problem? (I honestly can't remember if the 405 can do unaligned
access or not...)
-- Jason R. Thorpe <email@example.com>