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[/] [s80186/] [trunk/] [sim/] [cppmodel/] [instructions/] [lea.cpp] - Rev 2
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// Copyright Jamie Iles, 2017 // // This file is part of s80x86. // // s80x86 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. // // s80x86 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 s80x86. If not, see <http://www.gnu.org/licenses/>. // lea r, r/m void EmulatorPimpl::lea8d() { modrm_decoder->set_width(OP_WIDTH_16); modrm_decoder->decode(); if (modrm_decoder->rm_type() != OP_REG) registers->set(modrm_decoder->reg(), modrm_decoder->effective_address()); } // lds r, m void EmulatorPimpl::ldsc5() { modrm_decoder->set_width(OP_WIDTH_16); modrm_decoder->decode(); if (modrm_decoder->rm_type() == OP_REG) return; auto p32 = get_phys_addr(registers->get(get_segment(false)), modrm_decoder->effective_address()); auto displacement = mem->read<uint16_t>(p32); auto seg = mem->read<uint16_t>(p32 + 2); registers->set(modrm_decoder->reg(), displacement); registers->set(DS, seg); } // les r, m void EmulatorPimpl::lesc4() { modrm_decoder->set_width(OP_WIDTH_16); modrm_decoder->decode(); if (modrm_decoder->rm_type() == OP_REG) return; auto p32 = get_phys_addr(registers->get(get_segment(false)), modrm_decoder->effective_address()); auto displacement = mem->read<uint16_t>(p32); auto seg = mem->read<uint16_t>(p32 + 2); registers->set(modrm_decoder->reg(), displacement); registers->set(ES, seg); }