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Incorporates TRAPV tests.

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This commit is contained in:
Thomas Harte 2019-06-24 21:21:35 -04:00
parent 9a666fb8cc
commit e830d23533
2 changed files with 41 additions and 1 deletions
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38
OSBindings/Mac/Clock SignalTests/68000Tests.mm
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@ -2626,6 +2626,44 @@ class CPU::MC68000::ProcessorStorageTests {
XCTAssertEqual(state.supervisor_stack_pointer, 0x200);
}
// MARK: TRAPV
- (void)testTRAPV_taken {
_machine->set_program({
0x4e76 // TRAPV
});
_machine->set_initial_stack_pointer(0x206);
auto state = _machine->get_processor_state();
state.status = 0x702;
state.supervisor_stack_pointer = 0x206;
*_machine->ram_at(0x1e) = 0xfffe;
*_machine->ram_at(0xfffe) = 0x4e71;
_machine->set_processor_state(state);
_machine->run_for_instructions(1);
state = _machine->get_processor_state();
XCTAssertEqual(state.status, 0x2702);
XCTAssertEqual(state.stack_pointer(), 0x200);
XCTAssertEqual(*_machine->ram_at(0x202), 0x0000);
XCTAssertEqual(*_machine->ram_at(0x204), 0x1002);
XCTAssertEqual(*_machine->ram_at(0x200), 0x702);
XCTAssertEqual(34, _machine->get_cycle_count());
}
- (void)testTRAPV_untaken {
_machine->set_program({
0x4e76 // TRAPV
});
_machine->run_for_instructions(1);
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.program_counter, 0x1002 + 4);
XCTAssertEqual(4, _machine->get_cycle_count());
}
// MARK: UNLINK
- (void)testUNLINK_A6 {

4
Processors/68000/Implementation/68000Implementation.hpp
View File

@ -1268,10 +1268,12 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
case Operation::TRAPV: {
if(overflow_flag_) {
// Select the trap steps as next; the initial microcycle should be 4 cycles long.
// Select the trap steps as next; the initial microcycle should be skipped.
bus_program = trap_steps_;
populate_trap_steps(7, get_status());
set_next_microcycle_length(HalfCycles(0));
// Push the address after the TRAPV.
program_counter_.full -= 4;
}
} break;