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Add `did_set_pc`.

This commit is contained in:
Thomas Harte 2024-04-18 19:30:07 -04:00
parent 018f0e097f
commit d464ce831a
2 changed files with 9 additions and 0 deletions
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6
InstructionSets/ARM/Executor.hpp
View File

@ -31,6 +31,7 @@ DestinationT read_bus(SourceT value) {
struct NullStatusHandler {
void did_set_status() {}
void did_set_pc() {}
};
/// A class compatible with the @c OperationMapper definition of a scheduler which applies all actions
@ -195,6 +196,7 @@ struct Executor {
if(!is_comparison(flags.operation()) && fields.destination() == 15) {
registers_.set_pc(pc_proxy);
status_observer_.did_set_pc();
}
if constexpr (flags.set_condition_codes()) {
// "When Rd is R15 and the S flag in the instruction is set, the PSR is overwritten by the
@ -250,6 +252,7 @@ struct Executor {
registers_[14] = registers_.pc_status(0);
}
registers_.set_pc(registers_.pc(4) + branch.offset());
status_observer_.did_set_pc();
}
template <Flags f> void perform(SingleDataTransfer transfer) {
@ -358,6 +361,7 @@ struct Executor {
if(transfer.destination() == 15) {
registers_.set_pc(value);
status_observer_.did_set_pc();
} else {
registers_[transfer.destination()] = value;
}
@ -369,6 +373,7 @@ struct Executor {
if(flags.operation() == SingleDataTransferFlags::Operation::STR || transfer.base() != transfer.destination()) {
if(transfer.base() == 15) {
registers_.set_pc(offsetted_address);
status_observer_.did_set_pc();
} else {
registers_[transfer.base()] = offsetted_address;
}
@ -555,6 +560,7 @@ struct Executor {
// If this was an LDM to R15 then apply it appropriately.
if(is_ldm && list & (1 << 15)) {
registers_.set_pc(pc_proxy);
status_observer_.did_set_pc();
if constexpr (flags.load_psr()) {
registers_.set_status(pc_proxy);
status_observer_.did_set_status();

3
Machines/Acorn/Archimedes/Archimedes.cpp
View File

@ -420,6 +420,9 @@ class ConcreteMachine:
update_interrupts();
}
void did_set_pc() {
}
void update_clock_rates() {
video_divider_ = executor_.bus.video().clock_divider();
}