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Re: [ARM] Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes

From: Michael Collison <michael dot collison at linaro dot org>
To: Tejas Belagod <tejas dot belagod at arm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Thu, 09 Oct 2014 00:56:27 -0700
Subject: Re: [ARM] Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes
Authentication-results: sourceware.org; auth=none
References: <543633BD dot 9030004 at linaro dot org> <54363F8A dot 8020501 at arm dot com>


Tejas,

You are correct. I will update the comment.

On 10/9/2014 12:55 AM, Tejas Belagod wrote:

On 09/10/14 08:05, Michael Collison wrote:


The CLZ_DEFINED_VALUE_AT_ZERO macro is harded to return 32. For the
vector intrinsic vclz this is incorrect and should return the value
eight. The CTZ_DEFINED_VALUE_AT_ZERO has the same issue.

Tested on arm-linux-gnueabihf, arm-linux-gnueabi.

2014-10-08  Michael Collison <michael.collison@linaro.com>

      * config/arm/arm.h (CLZ_DEFINED_VALUE_AT_ZERO) : Update
      to support vector modes
      (CTZ_DEFINED_VALUE_AT_ZERO): Ditto


Update comment?

/* The arm5 clz instruction returns 32.  */


Thanks,
Tejas.

References:
- [ARM] Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes
  - From: Michael Collison
- Re: [ARM] Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes
  - From: Tejas Belagod

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