/* OpenIDA - Outil d'analyse de fichiers binaires
 * addressing.c - prise en compte des modes d'adressage ARM v4/5/6
 *
 * Copyright (C) 2013 Cyrille Bagard
 *
 *  This file is part of OpenIDA.
 *
 *  OpenIDA is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  OpenIDA is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "addressing.h"


#include "encoding.h"
#include "register.h"
#include "operands/content.h"
#include "operands/register.h"



/******************************************************************************
*                                                                             *
*  Paramètres  : instr  = instruction à compléter.                            *
*                data   = mot de données contenant les indications.           *
*                format = format du binaire manipulé.                         *
*                                                                             *
*  Description : Charge les opérandes selon le mode d'adressage § A5.2.1.     *
*                                                                             *
*  Retour      : true si le décodage s'est bien déroulé.                      *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

bool build_v456_operands_with_load_immediate_offset(GArmV456Instruction *instr, uint32_t data, const GExeFormat *format)
{
    uint8_t rd_index;                       /* Indice du registre Rd       */
    GArmV456Register *rd_reg;               /* Registre Rd en place        */
    GArchOperand *op;                       /* Opérande à ajouter          */
    uint8_t rn_index;                       /* Indice du registre Rn       */
    GArmV456Register *rn_reg;               /* Registre Rn en place        */
    uint16_t value;                         /* Valeur de décallage         */
    GImmOperand *offset;                    /* Opérande de décallage       */
    bool add;                               /* Utilisation du décallage    */

    /* Destination */

    rd_index = ARM_V456_REG_RD(data);
    rd_reg = g_armv456_register_new(rd_index);

    op = g_armv456_register_operand_new_from_existing(rd_reg);
    g_arch_instruction_attach_extra_operand(G_ARCH_INSTRUCTION(instr), op);

    /* Source */

    rn_index = ARM_V456_REG_RN(data);
    rn_reg = g_armv456_register_new(rn_index);

    value = ARM_V456_ADDR_MODE(data);
    offset = G_IMM_OPERAND(g_imm_operand_new_from_value(MDS_16_BITS_UNSIGNED, value));

    add = (data & ARM_V456_BIT_U);

    op = g_armv456_content_operand_new(rn_reg, offset, add);
    g_arch_instruction_attach_extra_operand(G_ARCH_INSTRUCTION(instr), op);

    return true;

}