From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7635 invoked by alias); 19 Feb 2003 16:56:02 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 7567 invoked by uid 71); 19 Feb 2003 16:56:00 -0000 Resent-Date: 19 Feb 2003 16:56:00 -0000 Resent-Message-ID: <20030219165600.7566.qmail@sources.redhat.com> Resent-From: gcc-gnats@gcc.gnu.org (GNATS Filer) Resent-Cc: gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org Resent-Reply-To: gcc-gnats@gcc.gnu.org, gertom@rgai.hu Received: (qmail 375 invoked by uid 48); 19 Feb 2003 16:50:44 -0000 Message-Id: <20030219165044.374.qmail@sources.redhat.com> Date: Wed, 19 Feb 2003 16:56:00 -0000 From: gertom@rgai.hu Reply-To: gertom@rgai.hu To: gcc-gnats@gcc.gnu.org X-Send-Pr-Version: gnatsweb-2.9.3 (1.1.1.1.2.31) Subject: target/9757: Gcc should use swp instruction in ARM targets X-SW-Source: 2003-02/txt/msg00939.txt.bz2 List-Id: >Number: 9757 >Category: target >Synopsis: Gcc should use swp instruction in ARM targets >Confidential: no >Severity: non-critical >Priority: medium >Responsible: unassigned >State: open >Class: pessimizes-code >Submitter-Id: net >Arrival-Date: Wed Feb 19 16:56:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: Tamás Gergely >Release: gcc version 3.3 20030210 (prerelease) >Organization: >Environment: BUILD & HOST: Linux 2.4.20 i686 unknown TARGET: arm-unknown-elf >Description: Swp instruction is not used at all in ARM target. Subsequent "LDR rA, [rB]; STR rC, [rB];" instructions could be done with one swp instruction: "SWP rA, rC, [rB]" if rA!=rC. The swp also works, and exchanges register and memory content, if rA=rC. >How-To-Repeat: >Fix: arm.md should be extended? >Release-Note: >Audit-Trail: >Unformatted: