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RE: [PATCH][AArch64] Fix Cortex-A53 shift costs

From: "Wilco Dijkstra" <wdijkstr at arm dot com>
To: "Kyrylo Tkachov" <Kyrylo dot Tkachov at arm dot com>
Cc: "GCC Patches" <gcc-patches at gcc dot gnu dot org>
Date: Fri, 1 May 2015 14:07:01 +0100
Subject: RE: [PATCH][AArch64] Fix Cortex-A53 shift costs
Authentication-results: sourceware.org; auth=none
References: <000501d05753$8d857460$a8905d20$ at com> <CAFqB+Pzsi73v5nVJgwuTFwp4rKGw0=Vj7YDW34KeV-G3V8ayOQ at mail dot gmail dot com>

> Marcus Shawcroft wrote:
> On 5 March 2015 at 14:49, Wilco Dijkstra <wdijkstr@arm.com> wrote:
> > This patch fixes the shift costs for Cortex-A53 so they are more accurate - immediate shifts
> use
> > SBFM/UBFM which takes 2 cycles, register controlled shifts take 1 cycle. Bootstrap and
> regression
> > OK.
> >
> > ChangeLog:
> > 2015-03-05  Wilco Dijkstra  <wdijkstr@arm.com>
> >
> >         * gcc/config/arm/aarch-cost-tables.h (cortexa53_extra_costs):
> >         Make Cortex-A53 shift costs more accurate.
> 
> OK /Marcus

Kyrill, could you check this in please? Patch attached

Wilco

2015-05-01  Wilco Dijkstra  <wdijkstr@arm.com>

	* gcc/config/arm/aarch-cost-tables.h (cortexa53_extra_costs):
	Make Cortex-A53 shift costs more accurate.

Attachment: 0001-Fix-A53-shift-costs.txt
Description: Text document

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