From patchwork Mon Jul 9 16:38:15 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Richard Earnshaw \(lists\)" X-Patchwork-Id: 141468 Delivered-To: patch@linaro.org Received: by 2002:a2e:9754:0:0:0:0:0 with SMTP id f20-v6csp2871799ljj; Mon, 9 Jul 2018 09:39:53 -0700 (PDT) X-Google-Smtp-Source: AAOMgpetg6ucKJKp6EhIYzrFWhsgAu4+fR3f2AJ9RHnD4hVH/C5NtQxOXbHJiG1B69wvhZ9/9asp X-Received: by 2002:a17:902:d88d:: with SMTP id b13-v6mr4256901plz.314.1531154393179; Mon, 09 Jul 2018 09:39:53 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1531154393; cv=none; d=google.com; s=arc-20160816; b=vX9yXmawK1jX/8QOZjNZH6z0HZ/gBWVu+Mbp9DrZ9JHjj6p6UIRZm7ow5KhVFaxguZ SmYzF1DHKnj5frM0DtLCiRcZ3nu+KAQsMzElhMnLLN+5VaKPi/bcbA0TQt65P61EzmVE cKQPbw78Ws3xhMGx4StXPpg96uk8805eQzBTFhFlATdwFbbAka+dTFOUTo/u9Di/MLeD xEKwyE1LTASVxv2MGuxfsKrEoYMzBA2ORsdXpno+pa7L7mJOTH8IuzE8yz4psqznhyvV 2TJB2sQwPJk5tobhNCld48ZAvWxDZzNnaG3NIqsepeYEt5BalTNCeO3TOIWInVLTcv09 1f/w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:delivered-to:sender:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:mailing-list:dkim-signature :domainkey-signature:arc-authentication-results; bh=WW/GzLumh7o2IWzFZ6L0Y8ZXueWnV6LFQILu2i02ucM=; b=V7Qf0LOFO1ruSUKb9VwuNbMikLnzOMDMd6xnbwUetLY8Vf3NWgol46YykXj/CP5VP2 5R6Uz3Pr1ak0/7QBDn3r9VKSrO10FzWIT1VoWHMF2rmp2Lwy/6p5MW+2FFrgQmZ6e8R4 PPyNe9MkQxxiCDZ0JcRRXxWPyJ6RS+4NDRKFLAEqYpBQaUXbrutBS03gvkxPstLTtA7C ALzE4/6G3/cepLL0AJ085Z4TaENsVYJg9UQyIARt7zPjVb9lhvqE8dh4JW0uGuOjow3u dpEvgRwNHcRAEXSV2b3X/wf43pqA40+Nbr58ES8VCvLHbdq9PV4I+xIyplD/IN+AJ1Ak zFhA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=nCFbfj1Y; spf=pass (google.com: domain of gcc-patches-return-481228-patch=linaro.org@gcc.gnu.org designates 209.132.180.131 as permitted sender) smtp.mailfrom="gcc-patches-return-481228-patch=linaro.org@gcc.gnu.org" Return-Path: Received: from sourceware.org (server1.sourceware.org. [209.132.180.131]) by mx.google.com with ESMTPS id g33-v6si15171850plb.297.2018.07.09.09.39.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 09 Jul 2018 09:39:53 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-return-481228-patch=linaro.org@gcc.gnu.org designates 209.132.180.131 as permitted sender) client-ip=209.132.180.131; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=nCFbfj1Y; spf=pass (google.com: domain of gcc-patches-return-481228-patch=linaro.org@gcc.gnu.org designates 209.132.180.131 as permitted sender) smtp.mailfrom="gcc-patches-return-481228-patch=linaro.org@gcc.gnu.org" DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; q=dns; s=default; b=bgAodLPRjewBUQ8C tx8LkSav/4XsRhVBmDz3FMtc2+FAsB9uZW6eO7FnhxUTl1B4r+EfqNEqrL2dur69 dYAE7L8/0Rki6lv3DvQC2hu0YlZMFh7FDWXGlIvaK4yTHih4YePB7JovwHuYS4I6 4EwNpD+IdrCZ22gr5Oa0I7qru+o= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender:from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=default; bh=LXdV+RzKviWvtG9UDSjIeu iVwlk=; b=nCFbfj1YZsSMp+Tuj9bWPRSCuBJZlF4hVBTPY0Mz19fisdwuK3iJJz cJq9SXqnAnDL4T4U+60XLRb34RWdlsHsIhIoK7AATfLHvnQemjM777Mz1gFrtieR z4TREjPl1SW+5Sduw+7LFrzx5XuG8HXXYgkiztVHCeDHi27uE0Vk8= Received: (qmail 90224 invoked by alias); 9 Jul 2018 16:39:18 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 89899 invoked by uid 89); 9 Jul 2018 16:39:16 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-26.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, SPF_PASS autolearn=ham version=3.3.2 spammy=Hard, Stuff X-HELO: foss.arm.com Received: from usa-sjc-mx-foss1.foss.arm.com (HELO foss.arm.com) (217.140.101.70) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 09 Jul 2018 16:39:14 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 934AF16A3; Mon, 9 Jul 2018 09:39:13 -0700 (PDT) Received: from e120077-lin.cambridge.arm.com (e120077-lin.cambridge.arm.com [10.2.206.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CC7BB3F589; Mon, 9 Jul 2018 09:39:12 -0700 (PDT) From: Richard Earnshaw To: gcc-patches@gcc.gnu.org Cc: Richard Earnshaw , richard.earnshaw@arm.com Subject: [PATCH 3/7] AArch64 - add speculation barrier Date: Mon, 9 Jul 2018 17:38:15 +0100 Message-Id: <1531154299-28349-4-git-send-email-Richard.Earnshaw@arm.com> In-Reply-To: <1531154299-28349-1-git-send-email-Richard.Earnshaw@arm.com> References: <1531154299-28349-1-git-send-email-Richard.Earnshaw@arm.com> MIME-Version: 1.0 Similar to Arm, this adds an unconditional speculation barrier for AArch64. * config/aarch64.md (unspecv): Add UNSPECV_SPECULAION_BARRIER. (speculation_barrier): New insn. --- gcc/config/aarch64/aarch64.md | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md index a014a01..c135ada 100644 --- a/gcc/config/aarch64/aarch64.md +++ b/gcc/config/aarch64/aarch64.md @@ -205,6 +205,7 @@ (define_c_enum "unspecv" [ UNSPECV_SET_FPSR ; Represent assign of FPSR content. UNSPECV_BLOCKAGE ; Represent a blockage UNSPECV_PROBE_STACK_RANGE ; Represent stack range probing. + UNSPECV_SPECULATION_BARRIER ; Represent speculation barrier. ] ) @@ -6093,6 +6094,15 @@ (define_expand "set_clobber_cc" (match_operand 1)) (clobber (reg:CC CC_REGNUM))])]) +;; Hard speculation barrier. +(define_insn "speculation_barrier" + [(unspec_volatile [(const_int 0)] UNSPECV_SPECULATION_BARRIER)] + "" + "isb\;dsb\\tsy" + [(set_attr "length" "8") + (set_attr "type" "block")] +) + ;; AdvSIMD Stuff (include "aarch64-simd.md")