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 BF9783858C50 for ; Mon, 17 Oct 2022 13:00:18 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org BF9783858C50 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666011618; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=U0fgGDpyr/23h6i5saUNQagjiLMePJzv53EWs/cK60A=; b=dZWcUCsxi0qvghCTWVNVtzNhJJRYTjnsfIZQG77Oc4rPIhzM25gFFAHmoTq7QFYYaXsZRg hwpXQZZYzMD52HkWrFM46zcP2P3SKsg1GdcTt5eRaH5dXwSGS22glze8VIL/cF5C85XBVj kNssXHlKSIXmf1607Iqc4UyYuNyXVlM= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-216-8qi5KEImNiSyHh-dw1Xzyg-1; Mon, 17 Oct 2022 09:00:17 -0400 X-MC-Unique: 8qi5KEImNiSyHh-dw1Xzyg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DD33D1C05AA8 for ; Mon, 17 Oct 2022 13:00:16 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.193.168]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7AA954EA4A for ; Mon, 17 Oct 2022 13:00:16 +0000 (UTC) From: Florian Weimer To: Florian Weimer via Libc-alpha Subject: Re: [PATCH] libgcc: Mostly vectorize CIE encoding extraction for FDEs References: <87mt9umxu4.fsf@oldenburg.str.redhat.com> Date: Mon, 17 Oct 2022 15:00:15 +0200 In-Reply-To: <87mt9umxu4.fsf@oldenburg.str.redhat.com> (Florian Weimer via Libc-alpha's message of "Mon, 17 Oct 2022 14:36:03 +0200") Message-ID: <87ilkimwps.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-5.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: * Florian Weimer via Libc-alpha: > "zR" and "zPLR" are the most common augmentations. Use a simple > SIMD-with-in-a-register technique to check for both augmentations, > and that the following variable-length integers have length 1, to > get more quickly at the encoding field. > > libgcc/ > > * unwind-dw2-fde.c (get_cie_encoding_slow): Rename from > get_cie_encoding. Mark as noinline. > (get_cie_encoding): Add fast path for "zR" and "zPLR" > augmentations. Call get_cie_encoding_slow as a fall-back. Sorry, this should have to gcc-patches. Will resend there. Thanks, Florian