From patchwork Thu Jan 3 17:08:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Aleksandar Markovic X-Patchwork-Id: 10747639 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BABC86C2 for ; Thu, 3 Jan 2019 17:39:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A5C8C28A3B for ; Thu, 3 Jan 2019 17:39:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9A69C28A44; Thu, 3 Jan 2019 17:39:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from listsout.gnu.org (listsout.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DF31A28A3B for ; Thu, 3 Jan 2019 17:39:29 +0000 (UTC) Received: from localhost ([127.0.0.1]:56730 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gf6xt-0005X1-4F for patchwork-qemu-devel@patchwork.kernel.org; Thu, 03 Jan 2019 12:39:29 -0500 Received: from eggs.gnu.org ([208.118.235.92]:38531) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gf6UL-0004n7-9E for qemu-devel@nongnu.org; Thu, 03 Jan 2019 12:08:59 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gf6UJ-0007zh-AI for qemu-devel@nongnu.org; Thu, 03 Jan 2019 12:08:57 -0500 Received: from mx2.rt-rk.com ([89.216.37.149]:46256 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 1gf6UI-0007et-UA for qemu-devel@nongnu.org; Thu, 03 Jan 2019 12:08:55 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 387031A218A; Thu, 3 Jan 2019 18:08:25 +0100 (CET) X-Virus-Scanned: amavisd-new at rt-rk.com Received: from rtrkw774-lin.domain.local (rtrkw774-lin.domain.local [10.10.13.43]) by mail.rt-rk.com (Postfix) with ESMTPSA id 1143F1A217B; Thu, 3 Jan 2019 18:08:25 +0100 (CET) From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Thu, 3 Jan 2019 18:08:05 +0100 Message-Id: <1546535297-11040-33-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1546535297-11040-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1546535297-11040-1-git-send-email-aleksandar.markovic@rt-rk.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PULL v3 32/44] 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: peter.maydell@linaro.org, amarkovic@wavecomp.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Aleksandar Markovic Comment the decoder of 'gpr4.zero' gpr encoding type in nanoMIPS disassembler. Reviewed-by: Aleksandar Rikalo 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 66b1223..de96125 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -397,6 +397,33 @@ uint64 NMD::encode_rd1_from_rd(uint64 d) } +/* + * 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 pattern: + * + * 1 0 + * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | └---------------------┐ + * | | | | | | | | | | | └---------------┐ | + * | | | | | | | | | | └---------------┐ | | + * | | | | | | | | | └---------------┐ | | | + * | | | | | | | | └---------------┐ | | | | + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | | | | | + * 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, except 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[] = { 8, 9, 10, 0, 4, 5, 6, 7,