From nobody Tue Nov 11 03:16:15 2025 Delivered-To: importer@patchew.org Received-SPF: temperror (zoho.com: Error in retrieving data from DNS) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=temperror (zoho.com: Error in retrieving data from DNS) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1560867541; cv=none; d=zoho.com; s=zohoarc; b=Ii4JhSDZQjJjlGY/cwV/Pc5FxlgXXkG/E9hVx4YM6k8fLLuC0WKIiZ66NxA1iTFx2cg/Gb+2dqWrQWPEoepGW+fuMFY36AmK+Js4Hnih/Pz7xhLMPJyPKcgsWjrjGKEeP/igRRhcv15SBEVqnLfPQ6Y+2LtGJKs5PLvW7C0hgKc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1560867541; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=ES5O1oJ0bsrOW5dYwAOiyu+5nxhH19p2VIhE93HWuRo=; b=CvKPPdO4jqwQYFA3y5ny2dQuN1GzyBlZ332/+A7/4y4yV7mIw/xHhaK1qLkLHyGOEM8SbeiEA3p6v4PWZ5qr0Jt8LitiWpwwu7eXgVWnYxuaMoZ9hCxaZkultqQ2DYBMvTB1OnEbvJyeFWEIQecons6JnPDTz1ljz8P0SX54eqI= ARC-Authentication-Results: i=1; mx.zoho.com; spf=temperror (zoho.com: Error in retrieving data from DNS) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 156086754156395.72542422601339; Tue, 18 Jun 2019 07:19:01 -0700 (PDT) Received: from localhost ([::1]:58460 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdEwj-0001KQ-GX for importer@patchew.org; Tue, 18 Jun 2019 10:18:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60044) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hdEpl-0002sO-Ip for qemu-devel@nongnu.org; Tue, 18 Jun 2019 10:11:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hdEpj-0007tB-Fa for qemu-devel@nongnu.org; Tue, 18 Jun 2019 10:11:37 -0400 Received: from mail01.asahi-net.or.jp ([202.224.55.13]:60241) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hdEpi-0007ma-TP for qemu-devel@nongnu.org; Tue, 18 Jun 2019 10:11:35 -0400 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 mail01.asahi-net.or.jp (Postfix) with ESMTPA id 4DA3D126D25; Tue, 18 Jun 2019 23:11:28 +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 1B9C1240087; Tue, 18 Jun 2019 23:11:26 +0900 (JST) From: Yoshinori Sato To: qemu-devel@nongnu.org Date: Tue, 18 Jun 2019 23:10:41 +0900 Message-Id: <20190618141118.52955-3-ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190618141118.52955-1-ysato@users.sourceforge.jp> References: <20190618141118.52955-1-ysato@users.sourceforge.jp> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 202.224.55.13 Subject: [Qemu-devel] [PATCH v21 02/21] qemu/bitops.h: Add extract8 and extract16 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: peter.maydell@linaro.org, imammedo@redhat.com, richard.henderson@linaro.org, Yoshinori Sato , philmd@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" 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 3f0926cf40..764f9d1ea0 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -301,6 +301,44 @@ static inline uint32_t extract32(uint32_t value, int s= tart, int 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 * @start: the lowest bit in the bit field (numbered from 0) --=20 2.11.0