Subject: Re: AltiVec and *jmp.
To: Jason R Thorpe <>
From: Matt Thomas <>
List: tech-userlevel
Date: 07/02/2002 08:31:10
At 08:20 AM 7/2/2002, Jason R Thorpe wrote:
>On Tue, Jul 02, 2002 at 08:06:46AM -0700, Matt Thomas wrote:
>  > Except that the SVR4 ABI extentions for AltiVec mandate saving the
>  > caller-saved AltiVec registers.  The question comes down to whether
>  > we want to ABI-compliant.
>Ah, it's specifically mentioned for setjmp/longjmp?  What about signals?

[opps, the ones saved are v20-v31 which are callee-saved.]

Nothing about signals.  Hmmm, signals could wipe out the caller-saved
ones.  Ewwww.  Got to think about that.

Matt Thomas               Internet:
3am Software Foundry      WWW URL:
Cupertino, CA             Disclaimer: I avow all knowledge of this message