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Extend MOVE.b fix to cover MOVE.w.

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This commit is contained in:
Thomas Harte 2022-06-14 17:04:11 -04:00
parent 61e0f60e94
commit bfd0b683bf
1 changed files with 53 additions and 28 deletions
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81
Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp
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@ -192,11 +192,17 @@ enum ExecutionState: int {
PEA_np_nS_ns, // Used to complete (An), (d16, [An/PC]) and (d8, [An/PC], Xn).
PEA_np_nS_ns_np, // Used to complete (xxx).w and (xxx).l
AddressingDispatch(MOVE_b), MOVE_b_AbsoluteLong_prefetch_first,
MOVE_b, MOVE_w,
AddressingDispatch(MOVE_bw), MOVE_bw_AbsoluteLong_prefetch_first,
};
#undef AddressingDispatch
/// @returns The proper select lines for @c instruction's operand size, assuming it is either byte or word.
template <typename InstructionT> Microcycle::OperationT data_select(const InstructionT &instruction) {
return Microcycle::OperationT(1 << int(instruction.operand_size()));
}
// MARK: - The state machine.
template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
@ -748,7 +754,7 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
StdCASE(MOVEb, perform_state_ = MOVE_b);
Duplicate(MOVEAw, MOVEw)
StdCASE(MOVEw, perform_state_ = MOVE);
StdCASE(MOVEw, perform_state_ = MOVE_w);
Duplicate(MOVEAl, MOVEl)
StdCASE(MOVEl, perform_state_ = MOVE);
@ -1115,8 +1121,20 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
operand_[next_operand_] = registers_[instruction_.lreg(next_operand_)];
MoveToNextOperand(FetchOperand_l);
BeginStateMode(MOVE_b, DataRegisterDirect):
registers_[instruction_.lreg(1)].b = operand_[1].b;
BeginStateMode(MOVE_bw, AddressRegisterDirect):
registers_[instruction_.reg(1)] = operand_[1];
Prefetch();
MoveToStateSpecific(Decode);
BeginStateMode(MOVE_bw, DataRegisterDirect): {
const uint32_t write_mask = size_masks[int(instruction_.operand_size())];
const int reg = instruction_.lreg(1);
registers_[reg].l =
(operand_[1].l & write_mask) |
(registers_[reg].l & ~write_mask);
}
Prefetch();
MoveToStateSpecific(Decode);
@ -1141,10 +1159,10 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AddressRegisterIndirect):
BeginStateMode(MOVE_bw, AddressRegisterIndirect):
effective_address_[1].l = registers_[8 + instruction_.reg(1)].l;
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
Access(operand_[next_operand_].low); // nw
Prefetch(); // np
@ -1186,13 +1204,15 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AddressRegisterIndirectWithPostincrement):
BeginStateMode(MOVE_bw, AddressRegisterIndirectWithPostincrement):
effective_address_[1].l = registers_[8 + instruction_.reg(1)].l;
registers_[8 + instruction_.reg(1)].l += address_increments[0][instruction_.reg(1)];
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
registers_[8 + instruction_.reg(next_operand_)].l +=
address_increments[int(instruction_.operand_size())][instruction_.reg(1)];
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, data_select(instruction_));
Access(operand_[next_operand_].low); // nw
Prefetch(); // np
MoveToStateSpecific(Decode);
@ -1226,11 +1246,12 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AddressRegisterIndirectWithPredecrement):
registers_[8 + instruction_.reg(1)].l -= address_increments[0][instruction_.reg(1)];
BeginStateMode(MOVE_bw, AddressRegisterIndirectWithPredecrement):
registers_[8 + instruction_.reg(1)].l -= address_increments[int(instruction_.operand_size())][instruction_.reg(1)];
effective_address_[1].l = registers_[8 + instruction_.reg(1)].l;
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
Prefetch(); // np
Access(operand_[next_operand_].low); // nw
@ -1270,13 +1291,13 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AddressRegisterIndirectWithDisplacement):
BeginStateMode(MOVE_bw, AddressRegisterIndirectWithDisplacement):
effective_address_[1].l =
registers_[8 + instruction_.reg(1)].l +
uint32_t(int16_t(prefetch_.w));
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
Prefetch(); // np
Access(operand_[next_operand_].low); // nw
@ -1331,13 +1352,13 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, ProgramCounterIndirectWithDisplacement):
BeginStateMode(MOVE_bw, ProgramCounterIndirectWithDisplacement):
effective_address_[1].l =
program_counter_.l - 2 +
uint32_t(int16_t(prefetch_.w));
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
Prefetch(); // np
Access(operand_[next_operand_].low); // nw
@ -1398,11 +1419,11 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AddressRegisterIndirectWithIndex8bitDisplacement):
BeginStateMode(MOVE_bw, AddressRegisterIndirectWithIndex8bitDisplacement):
effective_address_[1].l = d8Xn(registers_[8 + instruction_.reg(1)].l);
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
IdleBus(1); // n
Prefetch(); // np
@ -1462,11 +1483,11 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, ProgramCounterIndirectWithIndex8bitDisplacement):
BeginStateMode(MOVE_bw, ProgramCounterIndirectWithIndex8bitDisplacement):
effective_address_[1].l = d8Xn(program_counter_.l - 2);
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
IdleBus(1); // n
Prefetch(); // np
@ -1527,11 +1548,11 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AbsoluteShort):
BeginStateMode(MOVE_bw, AbsoluteShort):
effective_address_[1].l = uint32_t(int16_t(prefetch_.w));
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
Prefetch(); // np
Access(operand_[next_operand_].low); // nw
@ -1577,19 +1598,19 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(operand_[next_operand_].low); // nr
MoveToNextOperand(FetchOperand_bw);
BeginStateMode(MOVE_b, AbsoluteLong):
BeginStateMode(MOVE_bw, AbsoluteLong):
Prefetch(); // np
effective_address_[1].l = prefetch_.l;
SetDataAddress(effective_address_[1].l);
SetupDataAccess(0, Microcycle::SelectByte);
SetupDataAccess(0, data_select(instruction_));
switch(instruction_.mode(0)) {
case Mode::AddressRegisterDirect:
case Mode::DataRegisterDirect:
case Mode::ImmediateData:
MoveToStateSpecific(MOVE_b_AbsoluteLong_prefetch_first);
MoveToStateSpecific(MOVE_bw_AbsoluteLong_prefetch_first);
default: break;
}
@ -1599,7 +1620,7 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Prefetch(); // np
MoveToStateSpecific(Decode);
BeginState(MOVE_b_AbsoluteLong_prefetch_first):
BeginState(MOVE_bw_AbsoluteLong_prefetch_first):
Prefetch(); // np
Access(operand_[next_operand_].low); // nw
Prefetch(); // np
@ -1876,7 +1897,11 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
BeginState(MOVE_b):
PerformSpecific(MOVEb);
MoveToAddressingMode(MOVE_b, instruction_.mode(1));
MoveToAddressingMode(MOVE_bw, instruction_.mode(1));
BeginState(MOVE_w):
PerformSpecific(MOVEw);
MoveToAddressingMode(MOVE_bw, instruction_.mode(1));
//
// [ABCD/SBCD/SUBX/ADDX] (An)-, (An)-