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=-9.8 required=3.0 tests=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 B2315C33CA9 for ; Sun, 12 Jan 2020 12:51:52 +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 8CAC721556 for ; Sun, 12 Jan 2020 12:51:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8CAC721556 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=users.sourceforge.jp Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37660 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iqcid-0005yS-4r for qemu-devel@archiver.kernel.org; Sun, 12 Jan 2020 07:51:51 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:33012) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iqcgI-00043m-CA for qemu-devel@nongnu.org; Sun, 12 Jan 2020 07:49:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iqcgG-00017W-Ic for qemu-devel@nongnu.org; Sun, 12 Jan 2020 07:49:26 -0500 Received: from mail03.asahi-net.or.jp ([202.224.55.15]:37305) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iqcgG-0000rU-9f for qemu-devel@nongnu.org; Sun, 12 Jan 2020 07:49:24 -0500 Received: from h61-195-96-97.vps.ablenet.jp (h61-195-96-97.ablenetvps.ne.jp [61.195.96.97]) (Authenticated sender: PQ4Y-STU) by mail03.asahi-net.or.jp (Postfix) with ESMTPA id 2B413B8376; Sun, 12 Jan 2020 21:49:19 +0900 (JST) Received: from yo-satoh-debian.localdomain (ZM005235.ppp.dion.ne.jp [222.8.5.235]) by h61-195-96-97.vps.ablenet.jp (Postfix) with ESMTPSA id DB64E240090; Sun, 12 Jan 2020 21:49:18 +0900 (JST) From: Yoshinori Sato To: qemu-devel@nongnu.org Subject: [PATCH v28 02/22] qemu/bitops.h: Add extract8 and extract16 Date: Sun, 12 Jan 2020 21:48:53 +0900 Message-Id: <20200112124913.94959-3-ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200112124913.94959-1-ysato@users.sourceforge.jp> References: <20200112124913.94959-1-ysato@users.sourceforge.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 202.224.55.15 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: richard.henderson@linaro.org, philmd@redhat.com, Yoshinori Sato Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Yoshinori Sato Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Message-Id: <20190607091116.49044-10-ysato@users.sourceforge.jp> Tested-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Richard Henderson --- include/qemu/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 02c1ce6a5d..f55ce8b320 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)); } =20 +/** + * 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 >=3D 0 && length > 0 && length <=3D 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 >=3D 0 && length > 0 && length <=3D 16 - start); + return extract32(value, start, length); +} + /** * extract64: * @value: the value to extract the bit field from --=20 2.20.1