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Re: recent troubles with float vectors & bitwise ops

From: Paul Brook <paul at codesourcery dot com>
To: gcc at gcc dot gnu dot org
Cc: Mark Mitchell <mark at codesourcery dot com>, Ian Lance Taylor <iant at google dot com>, bonzini at gnu dot org, Ross Ridge <rridge at csclub dot uwaterloo dot ca>
Date: Fri, 24 Aug 2007 17:29:30 +0100
Subject: Re: recent troubles with float vectors & bitwise ops
References: <20070823013503.426FE74B95@caffeine.csclub.uwaterloo.ca> <200708241625.01424.paul@codesourcery.com> <46CF004A.6040002@codesourcery.com>

> > I'm partly worried about cross-platform compatibility, and what this
> > imples for other SIMD targets.
>
> Yes.  Here's a proposed definition:

<snip>

I agree this is the only sane definition.

I probably wasn't clear: My main concern is that if we do support this 
extension the internals should be implemented and documented in such a way 
that target maintainers (i.e. me) can figure out how to make it work on their 
favourite target. We should not just quietly flip some bit in the x86 
backend.

Paul

Follow-Ups:
- Re: recent troubles with float vectors & bitwise ops
  - From: Mark Mitchell

References:
- Re: recent troubles with float vectors & bitwise ops
  - From: Ross Ridge
- Re: recent troubles with float vectors & bitwise ops
  - From: Paul Brook
- Re: recent troubles with float vectors & bitwise ops
  - From: Mark Mitchell

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