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Date: Tue, 08 Sep 2015 08:42:00 -0000
From: James Greenhalgh <james.greenhalgh@arm.com>
To: Kyrill Tkachov <kyrylo.tkachov@arm.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>,        Marcus Shawcroft <Marcus.Shawcroft@arm.com>,        Richard Earnshaw <Richard.Earnshaw@arm.com>
Subject: Re: [PATCH][AArch64][1/3] Expand signed mod by power of 2 using CSNEG
Message-ID: <20150908083513.GA38681@arm.com>
References: <55B219A5.8060307@arm.com> <20150803130104.GA13835@arm.com> <55CC8F62.4080604@arm.com> <20150901092501.GA28861@arm.com> <55E580AC.2060200@arm.com> <55E6F2E7.1080904@arm.com>
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On Wed, Sep 02, 2015 at 02:00:23PM +0100, Kyrill Tkachov wrote:
> 
> On 01/09/15 11:40, Kyrill Tkachov wrote:
> > Hi James,
> >
> > On 01/09/15 10:25, James Greenhalgh wrote:
> >> On Thu, Aug 13, 2015 at 01:36:50PM +0100, Kyrill Tkachov wrote:
> >>
> >> Some comments below.
> > Thanks, I'll incorporate them, with one clarification inline.
> 
> And here's the updated patch.

OK.

Thanks,
James

> 2015-09-02  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
> 
>       * config/aarch64/aarch64.md (mod<mode>3): New define_expand.
>       (*neg<mode>2_compare0): Rename to...
>       (neg<mode>2_compare0): ... This.
>       * config/aarch64/aarch64.c (aarch64_rtx_costs, MOD case):
>       Move check for speed inside the if-then-elses.  Reflect
>       CSNEG sequence in MOD by power of 2 case.