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Re: vector compare

From: Paul Brook <paul at codesourcery dot com>
To: gcc at gcc dot gnu dot org
Cc: Ying Yi <M dot Yi at ed dot ac dot uk>
Date: Tue, 5 Jun 2007 18:15:40 +0100
Subject: Re: vector compare
References: <20070605133936.3pmpefgv4gk8wgg8@www.staffmail.ed.ac.uk>

On Tuesday 05 June 2007, Ying Yi wrote:
> Hi gcc group,
>
> I added vector compare and mov insns in gcc for our architecture
> (cross_gcc), but when I
> use these insns in c, I have to use builtin functions instead of
> generic vector compare.
>...
> Could someone tell me how to do vector compare in generic way?

You can't. GCC does not support this.

Vector comparisons don't easily/usefully map onto standard C operators. Adding 
them would probably want to be part of a larger extension for generic vector 
operations (element access, reduction operations, etc).

Paul

References:
- vector compare
  - From: Ying Yi

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