Re: [PATCH] S/390: Optimize atomic_compare_exchange and atomic_compare builtins.

[Dominik Vogt <vogt at linux dot vnet dot ibm dot com>]

On Wed, Apr 05, 2017 at 02:52:00PM +0100, Dominik Vogt wrote:
> On Mon, Mar 27, 2017 at 09:27:35PM +0100, Dominik Vogt wrote:
> > The attached patch optimizes the atomic_exchange and
> > atomic_compare patterns on s390 and s390x (mostly limited to
> > SImode and DImode).  Among general optimizaation, the changes fix
> > most of the problems reported in PR 80080:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80080
> > 
> > Bootstrapped and regression tested on a zEC12 with s390 and s390x
> > biarch.

New version attached.

v4:

  * Remoce CCZZ1 iterator. 
  * Remove duplicates of CS patterns. 
  * Move the skip_cs_label so that output is moved to vtarget even 
    if the CS instruction was not used. 
  * Removed leftover from "sne" (from an earlier version of the
  * patch). 

Bootstrapped and regression tested on a zEC12 with s390 and s390x
biarch.

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany

Attachment: 0001-v4-ChangeLog
Description: Text document

Attachment: 0001-v4-S-390-Optimize-atomic_compare_exchange-and-atomic_co.patch
Description: Text document