From patchwork Tue Dec 8 00:04:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Taylor Blau X-Patchwork-Id: 11957143 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=-13.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 D50C1C2BB40 for ; Tue, 8 Dec 2020 00:05:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B72B423A1D for ; Tue, 8 Dec 2020 00:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728565AbgLHAFt (ORCPT ); Mon, 7 Dec 2020 19:05:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728558AbgLHAFs (ORCPT ); Mon, 7 Dec 2020 19:05:48 -0500 Received: from mail-oo1-xc41.google.com (mail-oo1-xc41.google.com [IPv6:2607:f8b0:4864:20::c41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8765DC061749 for ; Mon, 7 Dec 2020 16:04:55 -0800 (PST) Received: by mail-oo1-xc41.google.com with SMTP id i7so3635267oot.8 for ; Mon, 07 Dec 2020 16:04:55 -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=tgwQSV0Jx2RFdjihG4qsp3emQ8nruJR26Qc29XYgvWk=; b=1rTyzAF5kh5uFw97ocA9ZigNbKXPAsOLQcrKOG0rrksaSYXvKMCrzZfF2sJ0vzos4r 6CkuJw5Nyx0eJvJ9cq6gCO4y4e6c9mlmf8cv/HD/EZvRx988GeeEE2sGpEg7ERpeivph q90Jgg3LaqFPYY71DUmdyieucJla3A9SgOttFzmIYX7GIgHerXREC+9WUv62XsIKd0H/ R2QlVZyDxe3tf4I8MziPqrHy8woAxxAQ5S4SiKGeCYaMTV7tssJy0Vlb4r71BmiTLEsu OXrkV/4l3lvw9UEePpmkRcaYuC/P/2eCHFZsg227mWhs+WgGrMtJGspxDexSLrqVB4yf CzhQ== 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=tgwQSV0Jx2RFdjihG4qsp3emQ8nruJR26Qc29XYgvWk=; b=dRYP6V2Gee2L1+iayEN359N3UBgwYuk9v5BO3VLcS1IDD5HoerCMlbCH41quS3TCjd A6UUunRKC6OgyW/CZC1ReJaXgFhs8WCdkHA2VedGVuBCmCW4uqehNonyuIVTc+heyLea vlrgYfSckFfg/J5IjNaIHEmoGaxppIVXhtDgbANg1/NqoXoRhDXG+EFeeNP6G1vgKfYO +UWV6YKz23Lpyj6kjl0+JTaHgRSRk8DjTuFdwyLekknDEt7jf+jj+x6+7XXaV6zYl30/ EJgt5Qyz5yMqOtv2/2/kcrka+KBp613NnW8VBrYT3EOZCce2HVMNCsWo07q9o21rpI9C o6MA== X-Gm-Message-State: AOAM530WFFhN33UXujULq8TLfAyYRE2Ktab1Z/GayVvfr7HutSmKGR7K 4747RyFPFt/Ukb8S/IeyzTWhrJjXXaFnq11M X-Google-Smtp-Source: ABdhPJyxZEGHsnadsvtvu5FLbuZTMAc+HUjOirWthXAouMWM3Dz8amRUEmPb1vT4uXQG3JG8ZUGWeQ== X-Received: by 2002:a4a:9b16:: with SMTP id a22mr4542898ook.6.1607385894667; Mon, 07 Dec 2020 16:04:54 -0800 (PST) Received: from localhost ([8.44.146.30]) by smtp.gmail.com with ESMTPSA id 94sm3020477otw.41.2020.12.07.16.04.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Dec 2020 16:04:54 -0800 (PST) Date: Mon, 7 Dec 2020 19:04:51 -0500 From: Taylor Blau To: git@vger.kernel.org Cc: peff@peff.net, jonathantanmy@google.com, dstolee@microsoft.com, gitster@pobox.com Subject: [PATCH v3 09/24] ewah: add bitmap_dup() function Message-ID: 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 0a3502603f..b5f6376282 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) { size_t old_size = 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);