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Re: Native support for vector shift

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Bingfeng Mei <bmei at broadcom dot com>
Cc: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Tue, 24 Feb 2009 18:51:52 +0000 (UTC)
Subject: Re: Native support for vector shift
References: <7FB04A5C213E9943A72EE127DB74F0AD49F007D5F1@SJEXCHCCR02.corp.ad.broadcom.com>

On Tue, 24 Feb 2009, Bingfeng Mei wrote:

> Currently, we have to use intrinsics to support such shift. Isn't syntax 
> of vector shift intuitive enough to be supported natively? Someone may 
> argue it breaks the C language. But vector is a GCC extension anyway. 
> Support for vector add/sub/etc already break C syntax. Any thought? 

The general guideline we've followed for C vector extensions is "like C++ 
valarray".  Does it support this?  (This isn't an absolute rule in either 
direction, but a useful guide and a set of semantics that have been 
well-tested in practice.)

-- 
Joseph S. Myers
joseph@codesourcery.com

Follow-Ups:
- RE: Native support for vector shift
  - From: Bingfeng Mei

References:
- Native support for vector shift
  - From: Bingfeng Mei

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