From nobody Tue Feb 10 00:59:27 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; 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 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1545922126898158.93202297898665; Thu, 27 Dec 2018 06:48:46 -0800 (PST) Received: from localhost ([127.0.0.1]:53383 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gcWxp-0008JP-Ep for importer@patchew.org; Thu, 27 Dec 2018 09:48:45 -0500 Received: from eggs.gnu.org ([208.118.235.92]:47870) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gcWZx-0001l1-Du for qemu-devel@nongnu.org; Thu, 27 Dec 2018 09:24:10 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gcWZt-0002S4-Hu for qemu-devel@nongnu.org; Thu, 27 Dec 2018 09:24:05 -0500 Received: from mx2.rt-rk.com ([89.216.37.149]:51246 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gcWZt-00020l-5x for qemu-devel@nongnu.org; Thu, 27 Dec 2018 09:24:01 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 78E4C1A2156; Thu, 27 Dec 2018 15:23:48 +0100 (CET) Received: from rtrkw774-lin.domain.local (rtrkw774-lin.domain.local [10.10.13.43]) by mail.rt-rk.com (Postfix) with ESMTPSA id 4E4591A2140; Thu, 27 Dec 2018 15:23:48 +0100 (CET) X-Virus-Scanned: amavisd-new at rt-rk.com From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Thu, 27 Dec 2018 15:22:58 +0100 Message-Id: <1545920586-17815-19-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1545920586-17815-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1545920586-17815-1-git-send-email-aleksandar.markovic@rt-rk.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH v6 18/26] disas: nanoMIPS: Comment the decoder of 'gpr4.zero' gpr encoding type 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: smarkovic@wavecomp.com, arikalo@wavecomp.com, amarkovic@wavecomp.com, aurelien@aurel32.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Aleksandar Markovic Comment the decoder of 'gpr4.zero' gpr encoding type in nanoMIPS disassembler. Signed-off-by: Aleksandar Markovic --- disas/nanomips.cpp | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp index f4acba8..6578aa3 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -396,6 +396,33 @@ uint64 NMD::encode_rd1_from_rd(uint64 d) } =20 =20 +/* + * NMD::decode_gpr_gpr4_zero() - decoder for 'gpr4.zero' gpr encoding type + * + * Map a 4-bit code to the 5-bit register space according to this patter= n: + * + * 1 0 + * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | =E2=94=94-------------------= --=E2=94=90 + * | | | | | | | | | | | =E2=94=94---------------=E2=94= =90 | + * | | | | | | | | | | =E2=94=94---------------=E2=94= =90 | | + * | | | | | | | | | =E2=94=94---------------=E2=94=90 = | | | + * | | | | | | | | =E2=94=94---------------=E2=94=90 | = | | | + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | | | | | + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 3 2 1 0 + * + * This pattern is the same one used for 'gpr4' gpr encoding type, excep= t for + * the input value 3, that is mapped to the output value 0 instead of 11. + * + * Used in handling following instructions: + * + * - MOVE.BALC + * - MOVEP + * - SW[4X4] + */ uint64 NMD::decode_gpr_gpr4_zero(uint64 d) { static uint64 register_list[] =3D { 8, 9, 10, 0, 4, 5, 6, 7, --=20 2.7.4