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Emulator cleanup, add AR conditionals

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wheremyfoodat 2023-07-21 00:55:08 +03:00
parent 08596c1a24
commit d007b2d780
5 changed files with 79 additions and 62 deletions
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27
src/core/action_replay.cpp
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@ -15,6 +15,8 @@ void ActionReplay::runCheat(const Cheat& cheat) {
// Set offset and data registers to 0 at the start of a cheat
data1 = data2 = offset1 = offset2 = 0;
pc = 0;
ifStackIndex = 0;
loopStackIndex = 0;
running = true;
activeOffset = &offset1;
@ -25,9 +27,16 @@ void ActionReplay::runCheat(const Cheat& cheat) {
if (pc + 1 >= cheat.size()) {
return;
}
// Fetch instruction
const u32 instruction = cheat[pc++];
// Instructions D0000000 00000000 and D2000000 00000000 are unconditional
bool isUnconditional = cheat[pc] == 0 && (instruction == 0xD0000000 || instruction == 0xD2000000);
if (ifStackIndex > 0 && !isUnconditional && !ifStack[ifStackIndex - 1]) {
pc++; // Eat up dummy word
continue; // Skip conditional instructions where the condition is false
}
runInstruction(cheat, instruction);
}
}
@ -162,13 +171,27 @@ void ActionReplay::executeDType(const Cheat& cheat, u32 instruction) {
case 0x00020000: storage1 = data1; break;
case 0x00020001: storage2 = data2; break;
default:
Helpers::warn("Unknown ActionReplay data operation");
Helpers::warn("Unknown ActionReplay data operation: %08X", subopcode);
running = false;
break;
}
break;
}
// Control flow block operations
case 0xD2000000: {
const u32 subopcode = cheat[pc++];
switch (subopcode) {
// Ends all loop/execute blocks
case 0:
loopStackIndex = 0;
ifStackIndex = 0;
break;
default: Helpers::panic("Unknown ActionReplay control flow operation: %08X", subopcode); break;
}
break;
}
default: Helpers::panic("ActionReplay: Unimplemented d-type opcode: %08X", instruction); break;
}
}