From nobody Fri Mar 29 13:39:05 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) 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=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1557814987; cv=none; d=zoho.com; s=zohoarc; b=W31CIwMCXnHIDuwKArJzdmyXZsShDSybzdKD2AenUTqBz07JNhT19J4JyY3575IynKxwkGE3wqct326I9gTuX9LpU9XcNxJrI2UHgGXtW6/joG0/Wew1br05YCCHuBpAid40K89R7r/t5ibR5XRUqVXyoUjrhAbrMr64rQtPCp4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1557814987; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=nZZzKwd3G1IpYEODBqAbi35OfYj7O6EHpkAKmbQN3J0=; b=OOYkgGcb04kHoTct1f0WEnVKvK/NAkZaxDSHhvWKPcLUfWgYIBKEVDj4HN4SN9vjpyIfebYSA94EDaDdnuoIHA6liBJT5REKvPYENtpTDg4823n/oFQ0L0Ccrm6ORccnvCsoKfEmU6sgr2MtBnVzyZACrN1u6BJW9tq61lENy94= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1557814987394169.90091730251447; Mon, 13 May 2019 23:23:07 -0700 (PDT) Received: from localhost ([127.0.0.1]:40170 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hQQq5-00011j-1B for importer@patchew.org; Tue, 14 May 2019 02:23:01 -0400 Received: from eggs.gnu.org ([209.51.188.92]:51903) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hQQih-0003Y5-T5 for qemu-devel@nongnu.org; Tue, 14 May 2019 02:15:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hQQif-0007gq-Ks for qemu-devel@nongnu.org; Tue, 14 May 2019 02:15:23 -0400 Received: from mail03.asahi-net.or.jp ([202.224.55.15]:45358) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hQQif-0007bk-AJ for qemu-devel@nongnu.org; Tue, 14 May 2019 02:15:21 -0400 Received: from h61-195-96-97.vps.ablenet.jp (h61-195-96-97.vps.ablenet.jp [61.195.96.97]) (Authenticated sender: PQ4Y-STU) by mail03.asahi-net.or.jp (Postfix) with ESMTPA id 9085F4180B; Tue, 14 May 2019 15:15:18 +0900 (JST) Received: from ysato.dip.jp (ZM005235.ppp.dion.ne.jp [222.8.5.235]) by h61-195-96-97.vps.ablenet.jp (Postfix) with ESMTPSA id 1374B240085; Tue, 14 May 2019 15:15:17 +0900 (JST) From: Yoshinori Sato To: qemu-devel@nongnu.org Date: Tue, 14 May 2019 15:14:57 +0900 Message-Id: <20190514061458.125225-12-ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190514061458.125225-1-ysato@users.sourceforge.jp> References: <20190514061458.125225-1-ysato@users.sourceforge.jp> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 202.224.55.15 Subject: [Qemu-devel] [PATCH v12 11/12] qemu/bitops.h: Add extract8 and extract16 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, richard.henderson@linaro.org, Yoshinori Sato , philmd@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Yoshinori Sato Reviewed-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