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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 4389BC352A3 for ; Thu, 13 Feb 2020 22:58:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 0BAF320873 for ; Thu, 13 Feb 2020 22:58:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="wAupu899" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0BAF320873 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60470 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j2NRa-0007I8-7I for qemu-devel@archiver.kernel.org; Thu, 13 Feb 2020 17:58:50 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:39859) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j2NKP-0004uO-7e for qemu-devel@nongnu.org; Thu, 13 Feb 2020 17:51:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j2NKO-0003vM-24 for qemu-devel@nongnu.org; Thu, 13 Feb 2020 17:51:25 -0500 Received: from mail-wm1-x343.google.com ([2a00:1450:4864:20::343]:40769) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1j2NKN-0003tQ-Ri for qemu-devel@nongnu.org; Thu, 13 Feb 2020 17:51:23 -0500 Received: by mail-wm1-x343.google.com with SMTP id t14so8602003wmi.5 for ; Thu, 13 Feb 2020 14:51:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=pTDgnQcfNCGcBS0F93StqkN1izWdDQLZMDSB8zlG3xk=; b=wAupu8999iU8ZRq1G6J3JcmKXOduih0GNkOBGU3ni68xoP8+uPPS5+YSa8E3zPgXnm otIcsd1RLkFtjO/WQgTGFQ87JgkQKDON13YYXpWczg4flAvw6siU2do8bIaK0pvzyd+H eE4qnH6HBb+26NabTWniFZtwsuc0GHBXEocjvVrvZKKv4LynsAKHEWi39slHJva7JX9p PukP2w9xK/vhMBzTY6kUK3fLKdAJfb92dtyufGPSSi7bwsVJYfTKescrR66MzuFK2+gV CvXRry5q2gtf/P2+nWZKJLRMQcYIhdPKAvxx8avZMgWCGfyMd6uaYR8eS8IqePKYkqA3 Mbzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=pTDgnQcfNCGcBS0F93StqkN1izWdDQLZMDSB8zlG3xk=; b=rWNItzBjqvBWAYl425myw6qG8v8ZSbQB2BRT9G43UUVm7nqmY6qe/61kY5v5LyK4S3 MI6dq5ZpkTdTDfyya20KXxZvqAXEpsTNIaJGX/5Ca/6q3CpWURhj7KTTe4XcDCe772Zs khZFKkf7t7KeVNdBQua7qzAi7THTIe/jfauSZpVsXQr8vp4Q/Jkl4r5UWDW5k4XhJiRn NEUPpru2CZPiqbhDacHQ1Je4qybZEKkScqiYQWKGPnLNH31esg9n43tMC+kLvow9M/bK xn0SKwNFSSPcbW6eJY4eGFYH6CfyldaN7nxCiBW7DT7KRTLFx5slSAEar8GbJUUYlNFf OVYg== X-Gm-Message-State: APjAAAXoO5YQ3znXTaPpLc3nd0OLGFefDqB0q7GaCCdEsU+Uc8Nz5d31 5dWdJwAwRGXQ8JN1RkaEHyxG/g== X-Google-Smtp-Source: APXvYqwgtsD4C/qMAzlD6Qq+4hHlQGwZzNIJhFqoau0B7jU+a9htWXmkqS8AvidQJfBKutSotbzq9w== X-Received: by 2002:a1c:688a:: with SMTP id d132mr304265wmc.189.1581634282829; Thu, 13 Feb 2020 14:51:22 -0800 (PST) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id 133sm5011722wme.32.2020.02.13.14.51.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2020 14:51:20 -0800 (PST) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id C1CC41FF9D; Thu, 13 Feb 2020 22:51:10 +0000 (GMT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Subject: [PATCH v2 13/19] qemu/bitops.h: Add extract8 and extract16 Date: Thu, 13 Feb 2020 22:51:03 +0000 Message-Id: <20200213225109.13120-14-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200213225109.13120-1-alex.bennee@linaro.org> References: <20200213225109.13120-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::343 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, berrange@redhat.com, robert.foley@linaro.org, pbonzini@redhat.com, stefanb@linux.vnet.ibm.com, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , richard.henderson@linaro.org, f4bug@amsat.org, robhenry@microsoft.com, Yoshinori Sato , =?UTF-8?q?Alex=20Benn=C3=A9e?= , marcandre.lureau@redhat.com, aaron@os.amperecomputing.com, cota@braap.org, stefanha@redhat.com, kuhn.chenqun@huawei.com, peter.puhov@linaro.org, aurelien@aurel32.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Yoshinori Sato Signed-off-by: Yoshinori Sato Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20190607091116.49044-10-ysato@users.sourceforge.jp> Tested-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson Signed-off-by: Alex Bennée Message-Id: <20200212130311.127515-3-ysato@users.sourceforge.jp> --- include/qemu/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 02c1ce6a5d4..f55ce8b320b 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -301,6 +301,44 @@ static inline uint32_t extract32(uint32_t value, int start, int length) return (value >> start) & (~0U >> (32 - length)); } +/** + * extract8: + * @value: the value to extract the bit field from + * @start: the lowest bit in the bit field (numbered from 0) + * @length: the length of the bit field + * + * Extract from the 8 bit input @value the bit field specified by the + * @start and @length parameters, and return it. The bit field must + * lie entirely within the 8 bit word. It is valid to request that + * all 8 bits are returned (ie @length 8 and @start 0). + * + * Returns: the value of the bit field extracted from the input value. + */ +static inline uint8_t extract8(uint8_t value, int start, int length) +{ + assert(start >= 0 && length > 0 && length <= 8 - start); + return extract32(value, start, length); +} + +/** + * extract16: + * @value: the value to extract the bit field from + * @start: the lowest bit in the bit field (numbered from 0) + * @length: the length of the bit field + * + * Extract from the 16 bit input @value the bit field specified by the + * @start and @length parameters, and return it. The bit field must + * lie entirely within the 16 bit word. It is valid to request that + * all 16 bits are returned (ie @length 16 and @start 0). + * + * Returns: the value of the bit field extracted from the input value. + */ +static inline uint16_t extract16(uint16_t value, int start, int length) +{ + assert(start >= 0 && length > 0 && length <= 16 - start); + return extract32(value, start, length); +} + /** * extract64: * @value: the value to extract the bit field from -- 2.20.1