URL
https://opencores.org/ocsvn/s80186/s80186/trunk
Subversion Repositories s80186
[/] [s80186/] [trunk/] [sim/] [cppmodel/] [instructions/] [call.cpp] - Rev 2
Compare with Previous | Blame | View Log
// 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::calle8() { auto displacement = fetch_16bit(); push_word(registers->get(IP) + instr_length); registers->set(IP, registers->get(IP) + instr_length + displacement); jump_taken = true; } void EmulatorPimpl::callff_intra() { auto displacement = read_data<uint16_t>(); push_word(registers->get(IP) + instr_length); registers->set(IP, displacement); jump_taken = true; } void EmulatorPimpl::callff_inter() { if (modrm_decoder->rm_type() == OP_REG) return; push_word(registers->get(CS)); push_word(registers->get(IP) + instr_length); auto cs_ip = read_data<uint32_t>(); registers->set(IP, cs_ip & 0xffff); registers->set(CS, (cs_ip >> 16) & 0xffff); jump_taken = true; } void EmulatorPimpl::call9a() { auto new_ip = fetch_16bit(); auto new_cs = fetch_16bit(); push_word(registers->get(CS)); push_word(registers->get(IP) + instr_length); registers->set(CS, new_cs); registers->set(IP, new_ip); jump_taken = true; }