[patch] RS/6000 fixes

[Geoff Keating]

> From: Hidvegi <hzoli@austin.ibm.com>
> Date: Thu, 8 Feb 2001 22:52:36 -0600 (CST)
> Cc: binutils@sources.redhat.com
> 
> Geoff Keating wrote:
> > AIX as doesn't strictly enforce the -m flags.  To be sure, you need to
> > find an as that doesn't understand any non-power opcodes, and see if
> > it understands 'crnot'.
> 
> What's wrong just accepting these in power mode?  These are just
> extended mnemonics for common mode instructions.  The AIX assembler
> accepts them, so it is not a compatibility problem, and the binary
> will work on power.

The purpose of this mode is to expose bugs, generally in GCC.  While
current AIX assemblers accept these opcodes, earlier AIX assemblers
won't.  I don't know that GCC still supports these earlier AIX
versions (3.x, I guess) but there's no reason to intentionally drop
support for them.

-- 
- Geoffrey Keating <geoffk@geoffk.org>