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Re: Native support for vector shift

From: Paolo Bonzini <bonzini at gnu dot org>
To: Andrew Pinski <pinskia at gmail dot com>
Cc: Michael Meissner <meissner at linux dot vnet dot ibm dot com>, Bingfeng Mei <bmei at broadcom dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Wed, 25 Feb 2009 08:28:12 +0100
Subject: Re: Native support for vector shift
References: <7FB04A5C213E9943A72EE127DB74F0AD49F007D5F1@SJEXCHCCR02.corp.ad.broadcom.com> <20090224210711.GA5300@hungry-tiger.westford.ibm.com> <7FB04A5C213E9943A72EE127DB74F0AD49F007D68E@SJEXCHCCR02.corp.ad.broadcom.com> <20090224220106.GA12379@hungry-tiger.westford.ibm.com> <de8d50360902241406k521c3d93u8b20c64a0cd3b094@mail.gmail.com>

>> It shouldn't be too hard to add the support.  I suspect the person who did the
>> initial support may have been on a machine without vector shifts.
> 
> Nope, because it was originally done by Aldy who did the VMX support
> which had vector shifts.

OTOH the support for vector lowering was weaker than now in 3.x and it
was harder to add more lowering.  It shouldn't be very hard now to add
all kinds of shifts and also auto-splatting.

Paolo

References:
- Native support for vector shift
  - From: Bingfeng Mei
- Re: Native support for vector shift
  - From: Michael Meissner
- RE: Native support for vector shift
  - From: Bingfeng Mei
- Re: Native support for vector shift
  - From: Michael Meissner
- Re: Native support for vector shift
  - From: Andrew Pinski

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