From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 2F17C3857B92 for ; Thu, 7 Jul 2022 09:30:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 2F17C3857B92 Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-602-RmfbTvFJPJqjNooYICb3-g-1; Thu, 07 Jul 2022 05:30:57 -0400 X-MC-Unique: RmfbTvFJPJqjNooYICb3-g-1 Received: by mail-qk1-f199.google.com with SMTP id de4-20020a05620a370400b006a9711bd9f8so17107400qkb.9 for ; Thu, 07 Jul 2022 02:30:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=otRqVUi6bjEjszIWhl33Yrq1xyF5eZxEmV+v0TSyL9Q=; b=ESzZkhhxqe5PrQ5q7iJKcOxX+R+KytEOot9u6XvjnilcJWvBbP1xmeR58kMP1e9EBM h7V93GGV1oOhn927xmZiraqmlnHqM5aTRRw9Zj/IxPWJ4dB9xjlBIMgA7vOqThyAMhbg GNcoojK29DFBVNFeUKnuw3Ze4cHMysEEoFPZu/zoExuGctnvbVKxkxY2rNLWytk4nsSH TrF7UfO547muMyIU/VsbgJ0YlGVAAGzcEJcgukDRL1JGtThjKXMz9s6refj6Y1vFHEl8 PTxCoyrYaPtSBNOtHrC4YYHMSPxrviY1vdPx08vAJDQ2/dl246qBOZBbNDpC9zI0wT00 Hjjw== X-Gm-Message-State: AJIora8vXRLVRNcluO/REh2A1o2hz4fQ37gKtoD2/kfP91bGuRlaGV7n LkBbmP5v+s0Fudbv/nHm7FJ3DkLllsyhHa2Wi3q2KDhqoyvJAxSopr+KRfQEaCNraOMMCX6G5ZX GAZypVSdVdlelMW2tkCPaLj0UkXU6yys= X-Received: by 2002:a05:6214:d4f:b0:470:2d37:f2de with SMTP id 15-20020a0562140d4f00b004702d37f2demr39583080qvr.42.1657186257129; Thu, 07 Jul 2022 02:30:57 -0700 (PDT) X-Google-Smtp-Source: AGRyM1sHbKEMmxgji0sPxENHtQG0xSuRHY3mrdjqTk2DgIQNbE9zSMJCP/SGy1eWRnYHQ/LJph72Qe2PwNCPnHDHPWs= X-Received: by 2002:a05:6214:d4f:b0:470:2d37:f2de with SMTP id 15-20020a0562140d4f00b004702d37f2demr39583074qvr.42.1657186256974; Thu, 07 Jul 2022 02:30:56 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Jonathan Wakely Date: Thu, 7 Jul 2022 10:30:46 +0100 Message-ID: Subject: Re: libstdc++: Minor codegen improvement for atomic wait spinloop To: Thomas Rodgers Cc: "libstdc++" , gcc Patches X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jul 2022 09:31:00 -0000 On Wed, 6 Jul 2022 at 22:42, Thomas Rodgers wrote: > > Ok for trunk? backport? Yes, for all branches that have the atomic wait code. > > On Wed, Jul 6, 2022 at 1:56 PM Jonathan Wakely wrote: >> >> On Wed, 6 Jul 2022 at 02:05, Thomas Rodgers via Libstdc++ >> wrote: >> > >> > This patch merges the spin loops in the atomic wait implementation which is >> > a >> > minor codegen improvement. >> > >> > libstdc++-v3/ChangeLog: >> > * include/bits/atomic_wait.h (__atomic_spin): Merge spin loops. >> >> OK, thanks. >>