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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id D44EC3851C13 for ; Wed, 6 Jul 2022 20:56:27 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org D44EC3851C13 Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-591-z1EHG5hoN0i6ZotL8WmtZw-1; Wed, 06 Jul 2022 16:56:26 -0400 X-MC-Unique: z1EHG5hoN0i6ZotL8WmtZw-1 Received: by mail-qt1-f199.google.com with SMTP id m6-20020ac866c6000000b002f52f9fb4edso13507093qtp.19 for ; Wed, 06 Jul 2022 13:56:26 -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=dEdhX+sjPdxzLP4GL6H94a/8fT5aj29FXNKL46qUVDU=; b=sxrIg9g1qMkndFFTpQCjR1w7qTAGChgVtnmTGV65IE/uAVRWbMCdsuBmm97up6sNy5 Wkn0hmLPg2KRF1b65vEbd6g9+pu6+M7xq9U/jUsD/e/o6qJE/hcPkyB1YLXiFgjyfZKe 9hW84W9NT1FUcpCypm0y7i0G0KLoNtL4b7wuL8UEGhgsOS1E8XjtDEwSHUvHDRlHtfha njFZiDKvcBYF71vHp9UGtgH2YF4nod0m7BVfDOJCnWJz5C0/xZLr6p7BN8wz73UFVLe3 wGH6eKQ0ctVijGhzoX5q2RuHlkH5I7JUNjlb/m5FeOXp/8IQaPqNl1qZgjNQiqdl6FNp tbZQ== X-Gm-Message-State: AJIora8wI6+M/h20NO+YcGYWkls6gAQsZiUU5QI8jgyEphiJWCWE5FGd nVqvdHlojO3oRYh8a1S8ya/k7hVosRJPviKqatlZ1f9qRxu4hbZBUxd+7QskvQIk6Ka+Es8MZdy xtWRlrNqQq9i5kKxexQkEHXE2cmEJWItmBA== X-Received: by 2002:a05:6214:3006:b0:46e:6be4:2b7d with SMTP id ke6-20020a056214300600b0046e6be42b7dmr38479369qvb.84.1657140985717; Wed, 06 Jul 2022 13:56:25 -0700 (PDT) X-Google-Smtp-Source: AGRyM1sglXNHYdyJUlMGvE1bvzfcynUfvwtubNEn4bbZVoIKyEE58Q6kk7tL+k+3kj0wb9ChunvmhBFrx+ik+HO2fmg= X-Received: by 2002:a05:6214:3006:b0:46e:6be4:2b7d with SMTP id ke6-20020a056214300600b0046e6be42b7dmr38479360qvb.84.1657140985552; Wed, 06 Jul 2022 13:56:25 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Jonathan Wakely Date: Wed, 6 Jul 2022 21:56:14 +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=-7.0 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jul 2022 20:56:28 -0000 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.