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Re: [patch] Implement vector shift left for Altivec

From: David Edelsohn <dje at watson dot ibm dot com>
To: Ira Rosen <IRAR at il dot ibm dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 21 Feb 2008 16:08:09 -0500
Subject: Re: [patch] Implement vector shift left for Altivec
References: <OFCC8D5223.EC02AB63-ONC22573F6.0044F210-C22573F6.00498E23@il.ibm.com>

Hi, Ira.

Thanks for developing this patch.  Why does altivec.md already implement
patterns altivec_vrl<VI_char>, altivec_vsl<VI_char>, altivec_vsl,
lshr<mode>3, and ashr<mode>3, but not ashl<mode>3?  Does Altivec
vsl{b,h,w} correctly implement the GCC ashlVMM3 semantics?

Also, the pattern should be placed with the other vsl patterns, not
breaking the grouping of vsr patterns.

Thanks, David

Follow-Ups:
- Re: [patch] Implement vector shift left for Altivec
  - From: Ira Rosen

References:
- [patch] Implement vector shift left for Altivec
  - From: Ira Rosen

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