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jamieiles |
// Copyright Jamie Iles, 2017
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//
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// This file is part of s80x86.
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//
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// s80x86 is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// s80x86 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with s80x86. If not, see <http://www.gnu.org/licenses/>.
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#include <gtest/gtest.h>
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#include "EmulateFixture.h"
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#include "Flags.h"
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#include "config.h"
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TEST_F(EmulateFixture, Wait)
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{
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// wait
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set_instruction({0x9b});
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emulate();
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}
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TEST_F(EmulateFixture, EscReg)
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{
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// esc
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for (uint8_t v = 0xd8; v <= 0xdf; ++v) {
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reset();
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write_mem16(VEC_ESCAPE + 2, 0x8000, CS); // CS
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write_mem16(VEC_ESCAPE + 0, 0x0100, CS); // IP
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write_reg(SP, 0x100);
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write_reg(CS, 0x7c00);
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write_reg(IP, 0x0001);
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set_instruction({v, 0xc0});
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emulate();
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if (S80X86_TRAP_ESCAPE) {
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EXPECT_EQ(read_reg(CS), 0x8000);
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EXPECT_EQ(read_reg(IP), 0x0100);
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EXPECT_EQ(read_reg(SP), 0x0100 - 6);
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EXPECT_EQ(read_mem16(0x100 - 2, SS), FLAGS_STUCK_BITS);
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EXPECT_EQ(read_mem16(0x100 - 4, SS), 0x7c00);
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// Return to the same instruction
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EXPECT_EQ(read_mem16(0x100 - 6, SS), 0x0001);
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} else {
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EXPECT_EQ(read_reg(CS), 0x7c00);
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EXPECT_EQ(read_reg(IP), 0x0001 + 2);
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}
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}
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}
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TEST_F(EmulateFixture, EscMem)
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{
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// esc
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for (uint8_t v = 0xd8; v <= 0xdf; ++v) {
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reset();
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write_mem16(VEC_ESCAPE + 2, 0x8000, CS); // CS
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write_mem16(VEC_ESCAPE + 0, 0x0100, CS); // IP
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write_reg(SP, 0x100);
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write_reg(CS, 0x7c00);
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write_reg(IP, 0x0001);
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set_instruction({v, 0x87, 0x34, 0x12});
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emulate();
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if (S80X86_TRAP_ESCAPE) {
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EXPECT_EQ(read_reg(CS), 0x8000);
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EXPECT_EQ(read_reg(IP), 0x0100);
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EXPECT_EQ(read_reg(SP), 0x0100 - 6);
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EXPECT_EQ(read_mem16(0x100 - 2, SS), FLAGS_STUCK_BITS);
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EXPECT_EQ(read_mem16(0x100 - 4, SS), 0x7c00);
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// Return to the same instruction
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EXPECT_EQ(read_mem16(0x100 - 6, SS), 0x0001);
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} else {
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EXPECT_EQ(read_reg(CS), 0x7c00);
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EXPECT_EQ(read_reg(IP), 0x0001 + 4);
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}
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}
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}
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TEST_F(EmulateFixture, EscMemSegmentOverride)
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{
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write_mem16(VEC_ESCAPE + 2, 0x8000, CS); // CS
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write_mem16(VEC_ESCAPE + 0, 0x0100, CS); // IP
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write_reg(SP, 0x100);
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write_reg(CS, 0x7c00);
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write_reg(IP, 0x0001);
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// es: esc
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set_instruction({0x26, 0xd8, 0x87, 0x34, 0x12});
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emulate();
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if (S80X86_TRAP_ESCAPE) {
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EXPECT_EQ(read_reg(CS), 0x8000);
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EXPECT_EQ(read_reg(IP), 0x0100);
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EXPECT_EQ(read_reg(SP), 0x0100 - 6);
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EXPECT_EQ(read_mem16(0x100 - 2, SS), FLAGS_STUCK_BITS);
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EXPECT_EQ(read_mem16(0x100 - 4, SS), 0x7c00);
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// Return to the same instruction
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EXPECT_EQ(read_mem16(0x100 - 6, SS), 0x0001);
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} else {
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EXPECT_EQ(read_reg(CS), 0x7c00);
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EXPECT_EQ(read_reg(IP), 0x0001 + 5);
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}
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}
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