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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 77F73C433ED for ; Wed, 28 Apr 2021 23:06:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5987461090 for ; Wed, 28 Apr 2021 23:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230382AbhD1XHZ (ORCPT ); Wed, 28 Apr 2021 19:07:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229488AbhD1XHY (ORCPT ); Wed, 28 Apr 2021 19:07:24 -0400 Received: from mail-qk1-x733.google.com (mail-qk1-x733.google.com [IPv6:2607:f8b0:4864:20::733]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EDCEC06138C for ; Wed, 28 Apr 2021 16:06:39 -0700 (PDT) Received: by mail-qk1-x733.google.com with SMTP id k127so9822418qkc.6 for ; Wed, 28 Apr 2021 16:06:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=9qLoG8GhVsaODXvAxNVSdW8lGghLvmtsq9pFbRDh42Y=; b=TDZzd9Yjn7zwOBAE6kqvkUuPXbahUd+wVeSFZKpWbKob9fl3wAJ1WJT8p4BGmnMUK/ DuJ3P1fGBC08Jw+LZwhm+xfSjdPlfsmvxQvQuBj0399jIdirjmH5Q03qVy8G1VOVOR7e x+vWDHkzR7HRTU0Cs5c9Oz0pVn31wfPsKtsl5akMO//OBs3Gu+hSPMeH2f9XIdV7to6c NPO1MW9vE8WwwZ6C0OQOn7NHVG0s6a345neSRiErDR22MWcZUrL9IxCku2/RRZ/WZxJX PFP/MuNqi9PEq5PLw2kCn6xW6s7eVR7IQq5F7JLlBilwKShwJSTAqPLknTAnXJyh2Or9 NF4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=9qLoG8GhVsaODXvAxNVSdW8lGghLvmtsq9pFbRDh42Y=; b=FRzCEipOsMoSv0XmgH3SOnsu86B8d9JPvmD+zLHhckNdpwxZUb6gaysikHeeYUnNyi YuVa05jrcvBExcYio+Uaew3t51Eg1qhbiIN/j7ZIdf+XlM9eF8LG8Z8uIAwBInFCM5Wr ktb75drn4WwqoPw3NTygh7YhfVk3+HwOlPkzw+LsaM9bRH3EOnjypDhsmobkIyjaWnUS hbl02c3gosvLO0p5se4YPllbrAU5E2az5zb4nyiisKNfzmbxaRhNUqIns8nA9k6jYca1 aWjJ0tE1nVOZd4ghD6bpEidU4BOvwcKTxXxd8PEMjtbSucEu2OC6KDYU4SPGIyAdAIqf IyFw== X-Gm-Message-State: AOAM533uuOQKKFIf1PjQeyxdyqx6lz1v8Ipb7MJDjILAXQ8e8hv4nwWp k189ObkeTJzF8+WfE8tjF3c= X-Google-Smtp-Source: ABdhPJx7/CKXkBSSiNqr83HqQNA928kpne7Yz76AtLT3qadpPggSsUB4qoL9p1sjG/M1p1Qei8ubGg== X-Received: by 2002:a05:620a:232:: with SMTP id u18mr8411245qkm.213.1619651198317; Wed, 28 Apr 2021 16:06:38 -0700 (PDT) Received: from ?IPv6:2601:152:4100:57e0:91c9:b195:c9a6:94c1? ([2601:152:4100:57e0:91c9:b195:c9a6:94c1]) by smtp.gmail.com with ESMTPSA id h62sm891040qkf.116.2021.04.28.16.06.36 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 28 Apr 2021 16:06:37 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [PATCH 2/2] m68k: introduce a virtual m68k machine From: Josh Juran In-Reply-To: Date: Wed, 28 Apr 2021 19:06:10 -0400 Cc: Laurent Vivier , Linux Kernel Mailing List , linux-m68k , linux-rtc@vger.kernel.org, Alessandro Zummo , Alexandre Belloni Content-Transfer-Encoding: 7bit Message-Id: References: <20210323221430.3735147-1-laurent@vivier.eu> <20210323221430.3735147-3-laurent@vivier.eu> To: Geert Uytterhoeven X-Mailer: Apple Mail (2.1878.6) Precedence: bulk List-ID: X-Mailing-List: linux-m68k@vger.kernel.org On Apr 28, 2021, at 8:04 AM, Geert Uytterhoeven wrote: > This can be simplified by shifting irq_pending instead of irq_bit: > > do { > if (irq_pending & 1) > generic_handle_irq(irq_num); > > ++irq_num; > irq_pending >>= 1; > } while (irq_pending); > > Unfortunately m68k doesn't have a single-instruction __ffs(). The 68000 and 68010 don't, but couldn't the 68020's BFFFO do the job? Josh