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=-8.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 CFD12C31E45 for ; Thu, 13 Jun 2019 16:18:20 +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 9E54A20665 for ; Thu, 13 Jun 2019 16:18:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YKsWlx26" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E54A20665 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To: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:List-Owner; bh=kwcUiHIpeJWoRffbQhHEiNGWNBqSByOpWb7VetBN7Po=; b=YKsWlx26ZUwEjm9smfbjBj0UHL DlW7osZ1PCQTue/O+ElRDrypolFRTWQUebr5HZIzBO7vBBwPtsRAgbUscTxR01fy5Tyw6MpmR7AD7 RnTdS5URA4DDQoAlQlANUN3oCDIDOnx/80yyUsek8Bqz/YiX7thwQptlR0OrXCEZUiNjF66LdxYjM V9mp2FAKh+WF1KpG1bUZlOZ1xYcy17IlntW9NoXDJubuTSGRLA3NcQ/WueDxaacm8MYW33pCgYWuB HXyze9ofo+u7P827ACVtfft6DfZuuJC1OPj/Laa5heNzTbQteBunZLaOlouW4JkToMeO8iXXF7fyI 0asH/36g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbSQU-0004wK-HA; Thu, 13 Jun 2019 16:18:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbSPU-00046b-Fu for linux-arm-kernel@lists.infradead.org; Thu, 13 Jun 2019 16:17:10 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 08C6EC84; Thu, 13 Jun 2019 09:17:08 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8D6313F694; Thu, 13 Jun 2019 09:17:06 -0700 (PDT) From: Julien Grall To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v2 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases Date: Thu, 13 Jun 2019 17:16:51 +0100 Message-Id: <20190613161656.20765-4-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190613161656.20765-1-julien.grall@arm.com> References: <20190613161656.20765-1-julien.grall@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190613_091708_607411_EE463BE2 X-CRM114-Status: GOOD ( 12.41 ) 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: Anton.Kirilov@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, oleg@redhat.com, zhang.lei@jp.fujitsu.com, Julien Grall , alex.bennee@linaro.org, Dave Martin , Daniel.Kiss@arm.com MIME-Version: 1.0 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 The current version of the macro "for" is only able to work when the counter is used to generate registers using mnemonics. This is because gas is not able to evaluate the expression generated if used in registers name (i.e x\n). Gas offers a way to evaluate macro arguments by using % in front of them under the alternate macro mode [1]. The implementation of "for" is updated to use the alternate macro mode and %, so we can use the macro in more cases. As the alternate macro mode may have side-effect, this is disabled when generating the body. While it is enough to prefix the argument of the macro "__for_body" with %, the arguments of "__for" are also prefixed to get a more bearable value in case of compilation error. [1] https://sourceware.org/binutils/docs/as/Altmacro.html Suggested-by: Dave Martin Signed-off-by: Julien Grall --- Changes in v2: - Fix typo in the commit message --- arch/arm64/include/asm/fpsimdmacros.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h index 46843515d77b..e2ab77dd9b4f 100644 --- a/arch/arm64/include/asm/fpsimdmacros.h +++ b/arch/arm64/include/asm/fpsimdmacros.h @@ -177,19 +177,23 @@ .macro __for from:req, to:req .if (\from) == (\to) - _for__body \from + _for__body %\from .else - __for \from, (\from) + ((\to) - (\from)) / 2 - __for (\from) + ((\to) - (\from)) / 2 + 1, \to + __for %\from, %((\from) + ((\to) - (\from)) / 2) + __for %((\from) + ((\to) - (\from)) / 2 + 1), %\to .endif .endm .macro _for var:req, from:req, to:req, insn:vararg .macro _for__body \var:req + .noaltmacro \insn + .altmacro .endm + .altmacro __for \from, \to + .noaltmacro .purgem _for__body .endm -- 2.11.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel