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Imports CMPA tests, and fixes CMPA.w.

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This commit is contained in:
Thomas Harte 2019-06-26 21:42:48 -04:00
parent ba2224dd06
commit dbdbea85c2
4 changed files with 84 additions and 1 deletions
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71
OSBindings/Mac/Clock SignalTests/68000Tests.mm
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@ -1981,6 +1981,77 @@ class CPU::MC68000::ProcessorStorageTests {
XCTAssertEqual(20, _machine->get_cycle_count());
}
// MARK: CMPA
- (void)performCMPAld1:(uint32_t)d1 a2:(uint32_t)a2 {
_machine->set_program({
0xb5c1 // CMPA.l D1, A2
});
auto state = _machine->get_processor_state();
state.data[1] = d1;
state.address[2] = a2;
_machine->set_processor_state(state);
_machine->run_for_instructions(1);
state = _machine->get_processor_state();
XCTAssertEqual(state.data[1], d1);
XCTAssertEqual(state.address[2], a2);
XCTAssertEqual(6, _machine->get_cycle_count());
}
- (void)testCMPAl_noFlags {
[self performCMPAld1:0x1234567f a2:0x12345680];
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.status & Flag::ConditionCodes, 0);
}
- (void)testCMPAl_carry {
[self performCMPAld1:0xfd234577 a2:0x12345680];
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.status & Flag::ConditionCodes, Flag::Carry);
}
- (void)testCMPAl_carryOverflowNegative {
[self performCMPAld1:0x85678943 a2:0x22563245];
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.status & Flag::ConditionCodes, Flag::Carry | Flag::Overflow | Flag::Negative);
}
- (void)performCMPAwd1:(uint32_t)d1 a2:(uint32_t)a2 {
_machine->set_program({
0xb4c1 // CMPA.w D1, A2
});
auto state = _machine->get_processor_state();
state.data[1] = d1;
state.address[2] = a2;
_machine->set_processor_state(state);
_machine->run_for_instructions(1);
state = _machine->get_processor_state();
XCTAssertEqual(state.data[1], d1);
XCTAssertEqual(state.address[2], a2);
XCTAssertEqual(6, _machine->get_cycle_count());
}
- (void)testCMPAw_carry {
[self performCMPAwd1:0x85678943 a2:0x22563245];
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.status & Flag::ConditionCodes, Flag::Carry);
}
- (void)testCMPAw_zero {
[self performCMPAwd1:0x0000ffff a2:0xffffffff];
const auto state = _machine->get_processor_state();
XCTAssertEqual(state.status & Flag::ConditionCodes, Flag::Zero);
}
// MARK: CMPM
- (void)testCMPMl {

11
Processors/68000/Implementation/68000Implementation.hpp
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@ -762,6 +762,17 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
overflow_flag_ = sub_overflow() & 0x8000;
} break;
case Operation::CMPAw: {
const auto source = uint64_t(u_extend16(active_program_->source->halves.low.full));
const auto destination = uint64_t(u_extend16(active_program_->destination->halves.low.full));
const auto result = destination - source;
zero_result_ = uint32_t(result);
carry_flag_ = result >> 32;
negative_flag_ = result & 0x80000000;
overflow_flag_ = sub_overflow() & 0x80000000;
} break;
case Operation::CMPl: {
const auto source = uint64_t(active_program_->source->full);
const auto destination = uint64_t(active_program_->destination->full);

2
Processors/68000/Implementation/68000Storage.cpp
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@ -648,7 +648,7 @@ struct ProcessorStorageConstructor {
{0xf1c0, 0xb040, Operation::CMPw, Decoder::CMP}, // 4-75 (p179)
{0xf1c0, 0xb080, Operation::CMPl, Decoder::CMP}, // 4-75 (p179)
{0xf1c0, 0xb0c0, Operation::CMPw, Decoder::CMPA}, // 4-77 (p181)
{0xf1c0, 0xb0c0, Operation::CMPAw, Decoder::CMPA}, // 4-77 (p181)
{0xf1c0, 0xb1c0, Operation::CMPl, Decoder::CMPA}, // 4-77 (p181)
{0xffc0, 0x0c00, Operation::CMPb, Decoder::CMPI}, // 4-79 (p183)

1
Processors/68000/Implementation/68000Storage.hpp
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@ -104,6 +104,7 @@ class ProcessorStorage {
BTSTb, BTSTl,
BCLRl, BCLRb,
CMPb, CMPw, CMPl,
CMPAw,
TSTb, TSTw, TSTl,
JMP, RTS,