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[/] [s80186/] [trunk/] [sim/] [cppmodel/] [instructions/] [xchg.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/>. // xchg r, r/m, 8-bit void EmulatorPimpl::xchg86() { modrm_decoder->set_width(OP_WIDTH_8); modrm_decoder->decode(); auto v1 = read_data<uint8_t>(); auto v2 = registers->get(modrm_decoder->reg()); write_data<uint8_t>(v2); registers->set(modrm_decoder->reg(), v1); } // xchg r, r/m, 16-bit void EmulatorPimpl::xchg87() { modrm_decoder->set_width(OP_WIDTH_16); modrm_decoder->decode(); auto v1 = read_data<uint16_t>(); auto v2 = registers->get(modrm_decoder->reg()); write_data<uint16_t>(v2); registers->set(modrm_decoder->reg(), v1); } // xchg accumulator, r void EmulatorPimpl::xchg90_97() { auto reg = static_cast<GPR>(static_cast<int>(AX) + (opcode & 0x7)); auto v1 = registers->get(AX); auto v2 = registers->get(reg); registers->set(AX, v2); registers->set(reg, v1); }