From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66FB9C18E5C for ; Tue, 10 Mar 2020 22:01:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1613921927 for ; Tue, 10 Mar 2020 22:01:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="f5YjoINF"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=agner.ch header.i=@agner.ch header.b="myQMTVO9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1613921927 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=agner.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=SO7xwnaJE5DjEgPeHsFiv86aX2bOZoyr7PLt54S+dHQ=; b=f5YjoINFc9g5LV pAJThVFYxbR3WHw1Jv0otuHcgfPk+tmp7b0n4lbxUXdFJMYlkbwHcInwT4qVE/BVfrEoRStjMo4Hc wv6Ur/JiHVxMNhpVCjbiNdH8TIrFBvl7PjEN+RCYI8iK2uq9s2VFayK8UVtrPwuFxUtAOKZJ0X7hT 810MBgljLjrS02IOUKcU0NtBPYYxHFysJdsepXPiy/ni8zt4UrcER8Q3RmrC4YXW8eL6OfKgjaVDX e4Jn1uFzsK/ODMlnzBVpFtnF4UxB1x493i3Jstktvrkw62SX8cH99M4NwlcXu9C7RgN/VkeW81U7K V9Wr1Y/bXapFLcj33uUA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jBmwb-0002wx-Hu; Tue, 10 Mar 2020 22:01:45 +0000 Received: from mail.kmu-office.ch ([2a02:418:6a02::a2]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jBmwN-0002p7-KL for linux-arm-kernel@lists.infradead.org; Tue, 10 Mar 2020 22:01:34 +0000 Received: from zyt.lan (unknown [IPv6:2a02:169:3df5::564]) by mail.kmu-office.ch (Postfix) with ESMTPSA id 1E5BF5C2157; Tue, 10 Mar 2020 23:01:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1583877685; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references; bh=y9mUQ47Qx5sWxU4e4s/o/28BEccjHtCQBjF8z/UpJQA=; b=myQMTVO9iLbwC69i6CgS14cavDxa3wRcSvyTw2x8TEZPdhyjXpSUnaXFceu7NNWcTEBJs7 pf3ixShGDXOIbwMQnyWr7xcXSEVSoDaqlJ2gtLApsaVmOJeP5lNv9Be6mTxMbr/3J64CTC 24wOk8GGmKBHVICv329Ipn1ASCGvVNw= From: Stefan Agner To: linux@armlinux.org.uk Subject: [PATCH 0/3] ARM: make use of UAL VFP mnemonics when possible Date: Tue, 10 Mar 2020 23:01:18 +0100 Message-Id: X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200310_150132_265524_A596C2EE X-CRM114-Status: GOOD ( 12.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: clang-built-linux@googlegroups.com, arnd@arndb.de, ard.biesheuvel@linaro.org, ndesaulniers@google.com, linux-kernel@vger.kernel.org, Stefan Agner , jiancai@google.com, yamada.masahiro@socionext.com, manojgupta@google.com, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org To build the kernel with Clang's integrated assembler the VFP code needs to make use of the unified assembler language (UAL) VFP mnemonics. At first I tried to get rid of the co-processor instructions to access the floating point unit along with the macros completely. However, due to missing FPINST/FPINST2 argument support in older binutils versions we have to keep them around. Once we drop support for binutils 2.24 and older, the move to UAL VFP mnemonics will be straight forward with this changes applied. Tested using Clang with integrated assembler as well as external (binutils assembler), various gcc/binutils version down to 4.7/2.23. Disassembled and compared the object files in arch/arm/vfp/ to make sure this changes leads to the same code. Besides different inlining behavior I was not able to spot a difference. This replaces (and extends) my earlier patch "ARM: use assembly mnemonics for VFP register access" http://lore.kernel.org/r/8bb16ac4b15a7e28a8e819ef9aae20bfc3f75fbc.1582266841.git.stefan@agner.ch -- Stefan Stefan Agner (3): ARM: use .fpu assembler directives instead of assembler arguments ARM: use VFP assembler mnemonics in register load/store macros ARM: use VFP assembler mnemonics if available arch/arm/include/asm/vfp.h | 2 ++ arch/arm/include/asm/vfpmacros.h | 31 ++++++++++++++++++++++--------- arch/arm/vfp/Makefile | 5 ++++- arch/arm/vfp/vfphw.S | 31 ++++++++++++++++++++----------- arch/arm/vfp/vfpinstr.h | 23 +++++++++++++++++++---- 5 files changed, 67 insertions(+), 25 deletions(-) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel