From patchwork Wed Nov 11 19:43:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taylor Blau X-Patchwork-Id: 11898401 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=-9.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 1700AC5517A for ; Wed, 11 Nov 2020 19:43:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A4A3D2087D for ; Wed, 11 Nov 2020 19:43:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ttaylorr-com.20150623.gappssmtp.com header.i=@ttaylorr-com.20150623.gappssmtp.com header.b="ySqkrOr8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727803AbgKKTnN (ORCPT ); Wed, 11 Nov 2020 14:43:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727773AbgKKTnN (ORCPT ); Wed, 11 Nov 2020 14:43:13 -0500 Received: from mail-qt1-x842.google.com (mail-qt1-x842.google.com [IPv6:2607:f8b0:4864:20::842]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1391CC0613D1 for ; Wed, 11 Nov 2020 11:43:12 -0800 (PST) Received: by mail-qt1-x842.google.com with SMTP id b16so1952012qtb.6 for ; Wed, 11 Nov 2020 11:43:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ttaylorr-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=bzeOBd/U/47Er7muYEe+SEG0TcfPAQqvipRIyq1W2Yw=; b=ySqkrOr8tR3GMgUtqy33ABBnoIZr03chDCS33nCUcIibJseTsluJBajvCmRq8oqPal WGm3qKATafMUvd0o824Nw6fOxPv82WUnxvJkyg4iRBBlOl29PvBND11lQNfs738EULTW AT4c73WVqHuzRAc61UIG2mP3eW51cSZLPsYjkUqKqTo9M+C0BMlS0GN8LIas4/fog5Rh gneuuLw94DObjzp1iz9LaUQ7wR+fdfvq4x19ShVEZijCX/bPez/6mUpM5sFevUIbPGBw 7pzdyvtkKtLHK0JjGjqagVVXMwQ0HYWtJywGKaRQJQ6cn9udl7ppe44iVBdoBAqdWK6z PwBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=bzeOBd/U/47Er7muYEe+SEG0TcfPAQqvipRIyq1W2Yw=; b=YN95rtIb5ROTuaKK1vJQ+vsheFVgVE8N2KeqimegdyTxcV57LYOxbNyqLcbd915DKn O3nUqnrKrOSt6JQ0pcZQppBjhXH33En67GKhOMXrrMVqRaDcabyMvJwixt72mPqhreF1 vK4YwC0fn0NIcGR8MltdLO9NtoF1PItcvkEV6qhpFSCbZ+JGFrkHberalELptPl/Kk56 xWHO/CiPd54jVmSog4e1qvU4GyQ5/vVLRDkMvqEKyf08RXDZEhAQ8PzWq5qBIxLxbyIX JyoffTvgz6MkkouVxeBNuis2zpjF0hLXv9zzPJwjr5lv2MSH+GUf+nU1gOjQJMoJkRft nQ/A== X-Gm-Message-State: AOAM532qUYO0BcSpblePm+G5QexE1sAMH9GMm3P1jjGjXcIM1dKBiLCV +OhLuTn64/AJ1lCBn041gvUTDq3YhgBSIdZc X-Google-Smtp-Source: ABdhPJzt63DGcuodKbUiKbfwMIQYU8iibHGIZnL18xMyJtWoZJ6TCL2KsfTX8bZwF+A0QKZt1dyP+g== X-Received: by 2002:a05:622a:4e:: with SMTP id y14mr17336842qtw.392.1605123791026; Wed, 11 Nov 2020 11:43:11 -0800 (PST) Received: from localhost ([2605:9480:22e:ff10:7ccc:9a51:1ad:2057]) by smtp.gmail.com with ESMTPSA id j50sm3297161qtc.5.2020.11.11.11.43.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Nov 2020 11:43:10 -0800 (PST) Date: Wed, 11 Nov 2020 14:43:08 -0500 From: Taylor Blau To: git@vger.kernel.org Cc: dstolee@microsoft.com, gitster@pobox.com, peff@peff.net Subject: [PATCH 09/23] ewah: add bitmap_dup() function Message-ID: <242bd3f110fe43c127208a7351215f1b238c714b.1605123652.git.me@ttaylorr.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Jeff King There's no easy way to make a copy of a bitmap. Obviously a caller can iterate over the bits and set them one by one in a new bitmap, but we can go much faster by copying whole words with memcpy(). Signed-off-by: Jeff King Signed-off-by: Taylor Blau --- ewah/bitmap.c | 7 +++++++ ewah/ewok.h | 1 + 2 files changed, 8 insertions(+) diff --git a/ewah/bitmap.c b/ewah/bitmap.c index c3f8e7242b..eb7e2539be 100644 --- a/ewah/bitmap.c +++ b/ewah/bitmap.c @@ -35,6 +35,13 @@ struct bitmap *bitmap_new(void) return bitmap_word_alloc(32); } +struct bitmap *bitmap_dup(const struct bitmap *src) +{ + struct bitmap *dst = bitmap_word_alloc(src->word_alloc); + COPY_ARRAY(dst->words, src->words, src->word_alloc); + return dst; +} + static void bitmap_grow(struct bitmap *self, size_t word_alloc) { if (word_alloc > self->word_alloc) { diff --git a/ewah/ewok.h b/ewah/ewok.h index 011852bef1..1fc555e672 100644 --- a/ewah/ewok.h +++ b/ewah/ewok.h @@ -173,6 +173,7 @@ struct bitmap { struct bitmap *bitmap_new(void); struct bitmap *bitmap_word_alloc(size_t word_alloc); +struct bitmap *bitmap_dup(const struct bitmap *src); void bitmap_set(struct bitmap *self, size_t pos); void bitmap_unset(struct bitmap *self, size_t pos); int bitmap_get(struct bitmap *self, size_t pos);