From patchwork Thu Dec 27 14:22:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Aleksandar Markovic X-Patchwork-Id: 1018889 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=208.118.235.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=rt-rk.com Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 43QXR96SNrz9s7h for ; Fri, 28 Dec 2018 01:34:29 +1100 (AEDT) Received: from localhost ([127.0.0.1]:53249 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gcWjz-0004Y6-Lg for incoming@patchwork.ozlabs.org; Thu, 27 Dec 2018 09:34:27 -0500 Received: from eggs.gnu.org ([208.118.235.92]:47876) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gcWZx-0001l5-Ej 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-0002Ru-Gk for qemu-devel@nongnu.org; Thu, 27 Dec 2018 09:24:05 -0500 Received: from mx2.rt-rk.com ([89.216.37.149]:51211 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-0001xA-6L 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 AF7941A214C; Thu, 27 Dec 2018 15:23:47 +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 854D31A2140; Thu, 27 Dec 2018 15:23:47 +0100 (CET) From: Aleksandar Markovic To: qemu-devel@nongnu.org Date: Thu, 27 Dec 2018 15:22:52 +0100 Message-Id: <1545920586-17815-13-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 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 12/26] disas: nanoMIPS: Comment the decoder of 'gpr3' 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Aleksandar Markovic Comment the decoder of 'gpr3' gpr encoding type in nanoMIPS disassembler. Signed-off-by: Aleksandar Markovic --- disas/nanomips.cpp | 51 ++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 48 insertions(+), 3 deletions(-) diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp index bfa8c1a..8f354b2 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -291,9 +291,54 @@ uint64 NMD::renumber_registers(uint64 index, uint64 *register_list, /* - * these functions should be decode functions but the json does not have - * decode sections so they are based on the encode, the equivalent decode - * functions need writing eventually. + * NMD::decode_gpr_gpr3() - decoder for 'gpr3' gpr encoding type + * + * Map a 3-bit code to the 5-bit register space according to this pattern: + * + * 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 + * + * Used in handling following instructions: + * + * - ADDIU[R1.SP] + * - ADDIU[R2] + * - ADDU[16] + * - AND[16] + * - ANDI[16] + * - BEQC[16] + * - BEQZC[16] + * - BNEC[16] + * - BNEZC[16] + * - LB[16] + * - LBU[16] + * - LH[16] + * - LHU[16] + * - LI[16] + * - LW[16] + * - LW[GP16] + * - LWXS[16] + * - NOT[16] + * - OR[16] + * - SB[16] + * - SH[16] + * - SLL[16] + * - SRL[16] + * - SUBU[16] + * - SW[16] + * - XOR[16] */ uint64 NMD::decode_gpr_gpr3(uint64 d) {