Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7DA67C433EF for ; Tue, 7 Dec 2021 13:28:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237193AbhLGNcP (ORCPT ); Tue, 7 Dec 2021 08:32:15 -0500 Received: from gandalf.ozlabs.org ([150.107.74.76]:58179 "EHLO gandalf.ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237121AbhLGNcB (ORCPT ); Tue, 7 Dec 2021 08:32:01 -0500 Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4J7h2P6bVJz4xh1; Wed, 8 Dec 2021 00:28:29 +1100 (AEDT) From: Michael Ellerman To: Benjamin Herrenschmidt , Christophe Leroy , Paul Mackerras , Michael Ellerman Cc: Segher Boessenkool , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: References: Subject: Re: [PATCH v5 1/3] powerpc/bitops: Use immediate operand when possible Message-Id: <163888362384.3690807.10443788415015128934.b4-ty@ellerman.id.au> Date: Wed, 08 Dec 2021 00:27:03 +1100 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 21 Sep 2021 17:09:47 +0200, Christophe Leroy wrote: > Today we get the following code generation for bitops like > set or clear bit: > > c0009fe0: 39 40 08 00 li r10,2048 > c0009fe4: 7c e0 40 28 lwarx r7,0,r8 > c0009fe8: 7c e7 53 78 or r7,r7,r10 > c0009fec: 7c e0 41 2d stwcx. r7,0,r8 > > [...] Applied to powerpc/next. [1/3] powerpc/bitops: Use immediate operand when possible https://git.kernel.org/powerpc/c/fb350784d8d17952afa93383bb47aaa6b715c459 [2/3] powerpc/atomics: Use immediate operand when possible https://git.kernel.org/powerpc/c/41d65207de9fbff58acd8937a7c3f8940c186a87 [3/3] powerpc/atomics: Remove atomic_inc()/atomic_dec() and friends https://git.kernel.org/powerpc/c/f05cab0034babaa9b3dfaf6003ee6493496a8180 cheers