From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5278 invoked by alias); 20 Nov 2017 12:50:20 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Received: (qmail 5186 invoked by uid 89); 20 Nov 2017 12:50:19 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-25.5 required=5.0 tests=AWL,BAYES_00,GIT_PATCH_0,GIT_PATCH_1,GIT_PATCH_2,GIT_PATCH_3,KAM_NUMSUBJECT,KB_WAM_FROM_NAME_SINGLEWORD,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=H*Ad:U*daniel, supervisor, H*Ad:U*ebotcazou, casa X-HELO: bin-vsp-out-03.atm.binero.net Received: from vsp-unauthed02.binero.net (HELO bin-vsp-out-03.atm.binero.net) (195.74.38.227) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 20 Nov 2017 12:50:16 +0000 X-Halon-ID: 586e8a56-cdf1-11e7-811b-0050569116f7 Authorized-sender: cederman@gaisler.com Received: from localhost.localdomain (unknown [81.170.187.120]) by bin-vsp-out-03.atm.binero.net (Halon) with ESMTPA id 586e8a56-cdf1-11e7-811b-0050569116f7; Mon, 20 Nov 2017 13:50:11 +0100 (CET) From: Daniel Cederman To: gcc-patches@gcc.gnu.org Cc: ebotcazou@adacore.com, sebastian.huber@embedded-brains.de, daniel@gaisler.com Subject: [PATCH 2/4] [SPARC] Errata workaround for GRLIB-TN-0011 Date: Mon, 20 Nov 2017 12:50:00 -0000 Message-Id: <20171120125003.22670-3-cederman@gaisler.com> In-Reply-To: <20171120125003.22670-1-cederman@gaisler.com> References: <20171120125003.22670-1-cederman@gaisler.com> X-IsSubscribed: yes X-SW-Source: 2017-11/txt/msg01752.txt.bz2 This patch provides a workaround for the errata described in GRLIB-TN-0011. If the workaround is enabled it will: * Insert .align 16 before atomic instructions (swap, ldstub, casa). It is applicable to GR712RC. gcc/ChangeLog: 2017-11-17 Daniel Cederman * config/sparc/sync.md (swapsi): 16-byte align if sparc_fix_gr712rc. (atomic_compare_and_swap_leon3_1): Likewise. (ldstub): Likewise. --- gcc/config/sparc/sync.md | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/gcc/config/sparc/sync.md b/gcc/config/sparc/sync.md index 1593bde..d5c505b 100644 --- a/gcc/config/sparc/sync.md +++ b/gcc/config/sparc/sync.md @@ -222,6 +222,8 @@ UNSPECV_CAS))] "TARGET_LEON3" { + if (sparc_fix_gr712rc) + output_asm_insn (".align\t16", operands); if (TARGET_SV_MODE) return "casa\t%1 0xb, %2, %0"; /* ASI for supervisor data space. */ else @@ -275,7 +277,12 @@ (set (match_dup 1) (match_operand:SI 2 "register_operand" "0"))] "(TARGET_V8 || TARGET_V9) && !sparc_fix_ut699" - "swap\t%1, %0" +{ + if (sparc_fix_gr712rc) + return ".align\t16\n\tswap\t%1, %0"; + else + return "swap\t%1, %0"; +} [(set_attr "type" "multi")]) (define_expand "atomic_test_and_set" @@ -307,5 +314,10 @@ UNSPECV_LDSTUB)) (set (match_dup 1) (const_int -1))] "!sparc_fix_ut699" - "ldstub\t%1, %0" +{ + if (sparc_fix_gr712rc) + return ".align\t16\n\tldstub\t%1, %0"; + else + return "ldstub\t%1, %0"; +} [(set_attr "type" "multi")]) -- 2.9.3