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Re: PowerPC Altivec version of setjmp/longjmp

From: Jeff Johnston <jjohnstn at redhat dot com>
To: Joel Sherrill <joel dot sherrill at oarcorp dot com>
Cc: Eric Norum <norume at aps dot anl dot gov>, newlib at sources dot redhat dot com
Date: Fri, 31 Aug 2007 17:02:31 -0400
Subject: Re: PowerPC Altivec version of setjmp/longjmp
References: <E854BCC6-5B5F-468C-BA18-86B1A712BFAA@aps.anl.gov> <46D86B6A.5090104@oarcorp.com>

Joel Sherrill wrote:

Eric Norum wrote:
The code in powerpc/setjmp.S contains conditionally assembled code which saves/restores the Altivec registers. This breaks on operating systems like RTEMS which do not normally enable the Altivec unit. The RTEMS maintainers asked me to submit this patch which was originally provided by Till Straumann <strauman@slac.stanford.edu> The patch is quite small so I've just attached it to this message.
There haven't been any comments on this.
Just because the CPU supports a feature doesn't mean it is enabled.
This patch just honors that.  Please consider merging it.
Thanks.

--joel sherrill

Ok, but please resubmit. The patch given does not apply cleanly for me: 4 of 8 hunks fail.

-- Jeff J.

References:
- PowerPC Altivec version of setjmp/longjmp
  - From: Eric Norum
- Re: PowerPC Altivec version of setjmp/longjmp
  - From: Joel Sherrill

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