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[/] [s80186/] [trunk/] [sim/] [cppmodel/] [instructions/] [cmps.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/>. void EmulatorPimpl::cmpsba6() { auto cmps = [&]() { auto s = mem->read<uint8_t>(get_phys_addr( registers->get(get_segment(false)), registers->get(SI))); auto d = mem->read<uint8_t>( get_phys_addr(registers->get(ES), registers->get(DI))); uint8_t result; uint16_t flags; std::tie(flags, result) = do_sub<uint8_t>(s, d); registers->set_flags(flags, OF | SF | ZF | AF | CF | PF); if (registers->get_flag(DF)) { registers->set(DI, registers->get(DI) - 1); registers->set(SI, registers->get(SI) - 1); } else { registers->set(DI, registers->get(DI) + 1); registers->set(SI, registers->get(SI) + 1); } }; do_rep(cmps, [&]() { return string_rep_complete(); }); } void EmulatorPimpl::cmpswa7() { auto cmps = [&]() { auto s = mem->read<uint16_t>(get_phys_addr( registers->get(get_segment(false)), registers->get(SI))); auto d = mem->read<uint16_t>( get_phys_addr(registers->get(ES), registers->get(DI))); uint16_t result; uint16_t flags; std::tie(flags, result) = do_sub<uint16_t>(s, d); registers->set_flags(flags, OF | SF | ZF | AF | CF | PF); if (registers->get_flag(DF)) { registers->set(DI, registers->get(DI) - 2); registers->set(SI, registers->get(SI) - 2); } else { registers->set(DI, registers->get(DI) + 2); registers->set(SI, registers->get(SI) + 2); } }; do_rep(cmps, [&]() { return string_rep_complete(); }); }