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wheremyfoodat 2023-07-21 15:12:40 +03:00
parent 0588b99674
commit 5d8f75a385
1 changed files with 27 additions and 16 deletions
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43
src/core/action_replay.cpp
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@ -29,14 +29,14 @@ void ActionReplay::runCheat(const Cheat& cheat) {
}
// 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
pc++; // Eat up dummy word
continue; // Skip conditional instructions where the condition is false
}
runInstruction(cheat, instruction);
}
}
@ -96,15 +96,16 @@ void ActionReplay::runInstruction(const Cheat& cheat, u32 instruction) {
break;
}
#define MAKE_IF_INSTRUCTION(opcode, comparator) \
case opcode: { \
const u32 baseAddr = Helpers::getBits<0, 28>(instruction); \
const u32 imm = cheat[pc++]; \
const u32 value = read32(baseAddr + *activeOffset); \
\
pushConditionBlock(imm comparator value); \
break; \
}
// clang-format off
#define MAKE_IF_INSTRUCTION(opcode, comparator) \
case opcode: { \
const u32 baseAddr = Helpers::getBits<0, 28>(instruction); \
const u32 imm = cheat[pc++]; \
const u32 value = read32(baseAddr + *activeOffset); \
\
pushConditionBlock(imm comparator value); \
break; \
}
// Greater Than (YYYYYYYY > [XXXXXXX + offset]) (Unsigned)
MAKE_IF_INSTRUCTION(3, >)
@ -112,12 +113,22 @@ void ActionReplay::runInstruction(const Cheat& cheat, u32 instruction) {
// Less Than (YYYYYYYY < [XXXXXXX + offset]) (Unsigned)
MAKE_IF_INSTRUCTION(4, <)
// Equal to (YYYYYYYY == [XXXXXXX + offset]) (Unsigned)
// Equal to (YYYYYYYY == [XXXXXXX + offset])
MAKE_IF_INSTRUCTION(5, ==)
// Not Equal (YYYYYYYY != [XXXXXXX + offset]) (Unsigned)
// Not Equal (YYYYYYYY != [XXXXXXX + offset])
MAKE_IF_INSTRUCTION(6, !=)
#undef MAKE_IF_INSTRUCTION
// clang-format on
// BXXXXXXX 00000000 - offset = *(XXXXXXX + offset)
case 0xB: {
const u32 baseAddr = Helpers::getBits<0, 28>(instruction);
*activeOffset = read32(baseAddr + *activeOffset);
pc++; // Eat up dummy word
break;
}
case 0xD: executeDType(cheat, instruction); break;
default: Helpers::panic("Unimplemented ActionReplay instruction type %X", type); break;
@ -199,7 +210,7 @@ void ActionReplay::executeDType(const Cheat& cheat, u32 instruction) {
case 0xD2000000: {
const u32 subopcode = cheat[pc++];
switch (subopcode) {
// Ends all loop/execute blocks
// Ends all loop/execute blocks
case 0:
loopStackIndex = 0;
ifStackIndex = 0;