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Merge pull request #4473 from lioncash/cheat-desig 

dmnt_cheat_vm: Make use of designated initializers
nce_cpp
bunnei 5 years ago
committed by GitHub
parent
cf35405a71 743ed2b727
commit
a4ff924420
1 changed files with 121 additions and 105 deletions
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  1. 226
      src/core/memory/dmnt_cheat_vm.cpp

226
src/core/memory/dmnt_cheat_vm.cpp
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@ -313,30 +313,32 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
switch (opcode_type) {
case CheatVmOpcodeType::StoreStatic: {
StoreStaticOpcode store_static{};
// 0TMR00AA AAAAAAAA YYYYYYYY (YYYYYYYY)
// Read additional words.
const u32 second_dword = GetNextDword();
store_static.bit_width = (first_dword >> 24) & 0xF;
store_static.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF);
store_static.offset_register = ((first_dword >> 16) & 0xF);
store_static.rel_address =
(static_cast<u64>(first_dword & 0xFF) << 32ul) | static_cast<u64>(second_dword);
store_static.value = GetNextVmInt(store_static.bit_width);
opcode.opcode = store_static;
const u32 bit_width = (first_dword >> 24) & 0xF;
opcode.opcode = StoreStaticOpcode{
.bit_width = bit_width,
.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF),
.offset_register = (first_dword >> 16) & 0xF,
.rel_address = (static_cast<u64>(first_dword & 0xFF) << 32) | second_dword,
.value = GetNextVmInt(bit_width),
};
} break;
case CheatVmOpcodeType::BeginConditionalBlock: {
BeginConditionalOpcode begin_cond{};
// 1TMC00AA AAAAAAAA YYYYYYYY (YYYYYYYY)
// Read additional words.
const u32 second_dword = GetNextDword();
begin_cond.bit_width = (first_dword >> 24) & 0xF;
begin_cond.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF);
begin_cond.cond_type = static_cast<ConditionalComparisonType>((first_dword >> 16) & 0xF);
begin_cond.rel_address =
(static_cast<u64>(first_dword & 0xFF) << 32ul) | static_cast<u64>(second_dword);
begin_cond.value = GetNextVmInt(begin_cond.bit_width);
opcode.opcode = begin_cond;
const u32 bit_width = (first_dword >> 24) & 0xF;
opcode.opcode = BeginConditionalOpcode{
.bit_width = bit_width,
.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF),
.cond_type = static_cast<ConditionalComparisonType>((first_dword >> 16) & 0xF),
.rel_address = (static_cast<u64>(first_dword & 0xFF) << 32) | second_dword,
.value = GetNextVmInt(bit_width),
};
} break;
case CheatVmOpcodeType::EndConditionalBlock: {
// 20000000
@ -344,12 +346,14 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
opcode.opcode = EndConditionalOpcode{};
} break;
case CheatVmOpcodeType::ControlLoop: {
ControlLoopOpcode ctrl_loop{};
// 300R0000 VVVVVVVV
// 310R0000
// Parse register, whether loop start or loop end.
ctrl_loop.start_loop = ((first_dword >> 24) & 0xF) == 0;
ctrl_loop.reg_index = ((first_dword >> 20) & 0xF);
ControlLoopOpcode ctrl_loop{
.start_loop = ((first_dword >> 24) & 0xF) == 0,
.reg_index = (first_dword >> 20) & 0xF,
.num_iters = 0,
};
// Read number of iters if loop start.
if (ctrl_loop.start_loop) {
@ -358,66 +362,65 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
opcode.opcode = ctrl_loop;
} break;
case CheatVmOpcodeType::LoadRegisterStatic: {
LoadRegisterStaticOpcode ldr_static{};
// 400R0000 VVVVVVVV VVVVVVVV
// Read additional words.
ldr_static.reg_index = ((first_dword >> 16) & 0xF);
ldr_static.value =
(static_cast<u64>(GetNextDword()) << 32ul) | static_cast<u64>(GetNextDword());
opcode.opcode = ldr_static;
opcode.opcode = LoadRegisterStaticOpcode{
.reg_index = (first_dword >> 16) & 0xF,
.value = (static_cast<u64>(GetNextDword()) << 32) | GetNextDword(),
};
} break;
case CheatVmOpcodeType::LoadRegisterMemory: {
LoadRegisterMemoryOpcode ldr_memory{};
// 5TMRI0AA AAAAAAAA
// Read additional words.
const u32 second_dword = GetNextDword();
ldr_memory.bit_width = (first_dword >> 24) & 0xF;
ldr_memory.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF);
ldr_memory.reg_index = ((first_dword >> 16) & 0xF);
ldr_memory.load_from_reg = ((first_dword >> 12) & 0xF) != 0;
ldr_memory.rel_address =
(static_cast<u64>(first_dword & 0xFF) << 32ul) | static_cast<u64>(second_dword);
opcode.opcode = ldr_memory;
opcode.opcode = LoadRegisterMemoryOpcode{
.bit_width = (first_dword >> 24) & 0xF,
.mem_type = static_cast<MemoryAccessType>((first_dword >> 20) & 0xF),
.reg_index = ((first_dword >> 16) & 0xF),
.load_from_reg = ((first_dword >> 12) & 0xF) != 0,
.rel_address = (static_cast<u64>(first_dword & 0xFF) << 32) | second_dword,
};
} break;
case CheatVmOpcodeType::StoreStaticToAddress: {
StoreStaticToAddressOpcode str_static{};
// 6T0RIor0 VVVVVVVV VVVVVVVV
// Read additional words.
str_static.bit_width = (first_dword >> 24) & 0xF;
str_static.reg_index = ((first_dword >> 16) & 0xF);
str_static.increment_reg = ((first_dword >> 12) & 0xF) != 0;
str_static.add_offset_reg = ((first_dword >> 8) & 0xF) != 0;
str_static.offset_reg_index = ((first_dword >> 4) & 0xF);
str_static.value =
(static_cast<u64>(GetNextDword()) << 32ul) | static_cast<u64>(GetNextDword());
opcode.opcode = str_static;
opcode.opcode = StoreStaticToAddressOpcode{
.bit_width = (first_dword >> 24) & 0xF,
.reg_index = (first_dword >> 16) & 0xF,
.increment_reg = ((first_dword >> 12) & 0xF) != 0,
.add_offset_reg = ((first_dword >> 8) & 0xF) != 0,
.offset_reg_index = (first_dword >> 4) & 0xF,
.value = (static_cast<u64>(GetNextDword()) << 32) | GetNextDword(),
};
} break;
case CheatVmOpcodeType::PerformArithmeticStatic: {
PerformArithmeticStaticOpcode perform_math_static{};
// 7T0RC000 VVVVVVVV
// Read additional words.
perform_math_static.bit_width = (first_dword >> 24) & 0xF;
perform_math_static.reg_index = ((first_dword >> 16) & 0xF);
perform_math_static.math_type =
static_cast<RegisterArithmeticType>((first_dword >> 12) & 0xF);
perform_math_static.value = GetNextDword();
opcode.opcode = perform_math_static;
opcode.opcode = PerformArithmeticStaticOpcode{
.bit_width = (first_dword >> 24) & 0xF,
.reg_index = ((first_dword >> 16) & 0xF),
.math_type = static_cast<RegisterArithmeticType>((first_dword >> 12) & 0xF),
.value = GetNextDword(),
};
} break;
case CheatVmOpcodeType::BeginKeypressConditionalBlock: {
BeginKeypressConditionalOpcode begin_keypress_cond{};
// 8kkkkkkk
// Just parse the mask.
begin_keypress_cond.key_mask = first_dword & 0x0FFFFFFF;
opcode.opcode = begin_keypress_cond;
opcode.opcode = BeginKeypressConditionalOpcode{
.key_mask = first_dword & 0x0FFFFFFF,
};
} break;
case CheatVmOpcodeType::PerformArithmeticRegister: {
PerformArithmeticRegisterOpcode perform_math_reg{};
// 9TCRSIs0 (VVVVVVVV (VVVVVVVV))
perform_math_reg.bit_width = (first_dword >> 24) & 0xF;
perform_math_reg.math_type = static_cast<RegisterArithmeticType>((first_dword >> 20) & 0xF);
perform_math_reg.dst_reg_index = ((first_dword >> 16) & 0xF);
perform_math_reg.src_reg_1_index = ((first_dword >> 12) & 0xF);
perform_math_reg.has_immediate = ((first_dword >> 8) & 0xF) != 0;
PerformArithmeticRegisterOpcode perform_math_reg{
.bit_width = (first_dword >> 24) & 0xF,
.math_type = static_cast<RegisterArithmeticType>((first_dword >> 20) & 0xF),
.dst_reg_index = (first_dword >> 16) & 0xF,
.src_reg_1_index = (first_dword >> 12) & 0xF,
.src_reg_2_index = 0,
.has_immediate = ((first_dword >> 8) & 0xF) != 0,
.value = {},
};
if (perform_math_reg.has_immediate) {
perform_math_reg.src_reg_2_index = 0;
perform_math_reg.value = GetNextVmInt(perform_math_reg.bit_width);
@ -427,7 +430,6 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
opcode.opcode = perform_math_reg;
} break;
case CheatVmOpcodeType::StoreRegisterToAddress: {
StoreRegisterToAddressOpcode str_register{};
// ATSRIOxa (aaaaaaaa)
// A = opcode 10
// T = bit width
@ -439,20 +441,23 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
// Relative Address
// x = offset register (for offset type 1), memory type (for offset type 3)
// a = relative address (for offset type 2+3)
str_register.bit_width = (first_dword >> 24) & 0xF;
str_register.str_reg_index = ((first_dword >> 20) & 0xF);
str_register.addr_reg_index = ((first_dword >> 16) & 0xF);
str_register.increment_reg = ((first_dword >> 12) & 0xF) != 0;
str_register.ofs_type = static_cast<StoreRegisterOffsetType>(((first_dword >> 8) & 0xF));
str_register.ofs_reg_index = ((first_dword >> 4) & 0xF);
StoreRegisterToAddressOpcode str_register{
.bit_width = (first_dword >> 24) & 0xF,
.str_reg_index = (first_dword >> 20) & 0xF,
.addr_reg_index = (first_dword >> 16) & 0xF,
.increment_reg = ((first_dword >> 12) & 0xF) != 0,
.ofs_type = static_cast<StoreRegisterOffsetType>(((first_dword >> 8) & 0xF)),
.mem_type = MemoryAccessType::MainNso,
.ofs_reg_index = (first_dword >> 4) & 0xF,
.rel_address = 0,
};
switch (str_register.ofs_type) {
case StoreRegisterOffsetType::None:
case StoreRegisterOffsetType::Reg:
// Nothing more to do
break;
case StoreRegisterOffsetType::Imm:
str_register.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
str_register.rel_address = (static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
case StoreRegisterOffsetType::MemReg:
str_register.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
@ -460,8 +465,7 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
case StoreRegisterOffsetType::MemImm:
case StoreRegisterOffsetType::MemImmReg:
str_register.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
str_register.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
str_register.rel_address = (static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
default:
str_register.ofs_type = StoreRegisterOffsetType::None;
@ -470,7 +474,6 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
opcode.opcode = str_register;
} break;
case CheatVmOpcodeType::BeginRegisterConditionalBlock: {
BeginRegisterConditionalOpcode begin_reg_cond{};
// C0TcSX##
// C0TcS0Ma aaaaaaaa
// C0TcS1Mr
@ -492,11 +495,19 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
// r = offset register.
// X = other register.
// V = value.
begin_reg_cond.bit_width = (first_dword >> 20) & 0xF;
begin_reg_cond.cond_type =
static_cast<ConditionalComparisonType>((first_dword >> 16) & 0xF);
begin_reg_cond.val_reg_index = ((first_dword >> 12) & 0xF);
begin_reg_cond.comp_type = static_cast<CompareRegisterValueType>((first_dword >> 8) & 0xF);
BeginRegisterConditionalOpcode begin_reg_cond{
.bit_width = (first_dword >> 20) & 0xF,
.cond_type = static_cast<ConditionalComparisonType>((first_dword >> 16) & 0xF),
.val_reg_index = (first_dword >> 12) & 0xF,
.comp_type = static_cast<CompareRegisterValueType>((first_dword >> 8) & 0xF),
.mem_type = MemoryAccessType::MainNso,
.addr_reg_index = 0,
.other_reg_index = 0,
.ofs_reg_index = 0,
.rel_address = 0,
.value = {},
};
switch (begin_reg_cond.comp_type) {
case CompareRegisterValueType::StaticValue:
@ -508,26 +519,25 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
case CompareRegisterValueType::MemoryRelAddr:
begin_reg_cond.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
begin_reg_cond.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
(static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
case CompareRegisterValueType::MemoryOfsReg:
begin_reg_cond.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
begin_reg_cond.ofs_reg_index = (first_dword & 0xF);
break;
case CompareRegisterValueType::RegisterRelAddr:
begin_reg_cond.addr_reg_index = ((first_dword >> 4) & 0xF);
begin_reg_cond.addr_reg_index = (first_dword >> 4) & 0xF;
begin_reg_cond.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
(static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
case CompareRegisterValueType::RegisterOfsReg:
begin_reg_cond.addr_reg_index = ((first_dword >> 4) & 0xF);
begin_reg_cond.ofs_reg_index = (first_dword & 0xF);
begin_reg_cond.addr_reg_index = (first_dword >> 4) & 0xF;
begin_reg_cond.ofs_reg_index = first_dword & 0xF;
break;
}
opcode.opcode = begin_reg_cond;
} break;
case CheatVmOpcodeType::SaveRestoreRegister: {
SaveRestoreRegisterOpcode save_restore_reg{};
// C10D0Sx0
// C1 = opcode 0xC1
// D = destination index.
@ -535,36 +545,37 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
// x = 3 if clearing reg, 2 if clearing saved value, 1 if saving a register, 0 if restoring
// a register.
// NOTE: If we add more save slots later, current encoding is backwards compatible.
save_restore_reg.dst_index = (first_dword >> 16) & 0xF;
save_restore_reg.src_index = (first_dword >> 8) & 0xF;
save_restore_reg.op_type = static_cast<SaveRestoreRegisterOpType>((first_dword >> 4) & 0xF);
opcode.opcode = save_restore_reg;
opcode.opcode = SaveRestoreRegisterOpcode{
.dst_index = (first_dword >> 16) & 0xF,
.src_index = (first_dword >> 8) & 0xF,
.op_type = static_cast<SaveRestoreRegisterOpType>((first_dword >> 4) & 0xF),
};
} break;
case CheatVmOpcodeType::SaveRestoreRegisterMask: {
SaveRestoreRegisterMaskOpcode save_restore_regmask{};
// C2x0XXXX
// C2 = opcode 0xC2
// x = 3 if clearing reg, 2 if clearing saved value, 1 if saving, 0 if restoring.
// X = 16-bit bitmask, bit i --> save or restore register i.
save_restore_regmask.op_type =
static_cast<SaveRestoreRegisterOpType>((first_dword >> 20) & 0xF);
SaveRestoreRegisterMaskOpcode save_restore_regmask{
.op_type = static_cast<SaveRestoreRegisterOpType>((first_dword >> 20) & 0xF),
.should_operate = {},
};
for (std::size_t i = 0; i < NumRegisters; i++) {
save_restore_regmask.should_operate[i] = (first_dword & (1u << i)) != 0;
save_restore_regmask.should_operate[i] = (first_dword & (1U << i)) != 0;
}
opcode.opcode = save_restore_regmask;
} break;
case CheatVmOpcodeType::ReadWriteStaticRegister: {
ReadWriteStaticRegisterOpcode rw_static_reg{};
// C3000XXx
// C3 = opcode 0xC3.
// XX = static register index.
// x = register index.
rw_static_reg.static_idx = ((first_dword >> 4) & 0xFF);
rw_static_reg.idx = (first_dword & 0xF);
opcode.opcode = rw_static_reg;
opcode.opcode = ReadWriteStaticRegisterOpcode{
.static_idx = (first_dword >> 4) & 0xFF,
.idx = first_dword & 0xF,
};
} break;
case CheatVmOpcodeType::DebugLog: {
DebugLogOpcode debug_log{};
// FFFTIX##
// FFFTI0Ma aaaaaaaa
// FFFTI1Mr
@ -583,31 +594,36 @@ bool DmntCheatVm::DecodeNextOpcode(CheatVmOpcode& out) {
// a = relative address.
// r = offset register.
// X = value register.
debug_log.bit_width = (first_dword >> 16) & 0xF;
debug_log.log_id = ((first_dword >> 12) & 0xF);
debug_log.val_type = static_cast<DebugLogValueType>((first_dword >> 8) & 0xF);
DebugLogOpcode debug_log{
.bit_width = (first_dword >> 16) & 0xF,
.log_id = (first_dword >> 12) & 0xF,
.val_type = static_cast<DebugLogValueType>((first_dword >> 8) & 0xF),
.mem_type = MemoryAccessType::MainNso,
.addr_reg_index = 0,
.val_reg_index = 0,
.ofs_reg_index = 0,
.rel_address = 0,
};
switch (debug_log.val_type) {
case DebugLogValueType::RegisterValue:
debug_log.val_reg_index = ((first_dword >> 4) & 0xF);
debug_log.val_reg_index = (first_dword >> 4) & 0xF;
break;
case DebugLogValueType::MemoryRelAddr:
debug_log.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
debug_log.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
debug_log.rel_address = (static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
case DebugLogValueType::MemoryOfsReg:
debug_log.mem_type = static_cast<MemoryAccessType>((first_dword >> 4) & 0xF);
debug_log.ofs_reg_index = (first_dword & 0xF);
debug_log.ofs_reg_index = first_dword & 0xF;
break;
case DebugLogValueType::RegisterRelAddr:
debug_log.addr_reg_index = ((first_dword >> 4) & 0xF);
debug_log.rel_address =
((static_cast<u64>(first_dword & 0xF) << 32ul) | static_cast<u64>(GetNextDword()));
debug_log.addr_reg_index = (first_dword >> 4) & 0xF;
debug_log.rel_address = (static_cast<u64>(first_dword & 0xF) << 32) | GetNextDword();
break;
case DebugLogValueType::RegisterOfsReg:
debug_log.addr_reg_index = ((first_dword >> 4) & 0xF);
debug_log.ofs_reg_index = (first_dword & 0xF);
debug_log.addr_reg_index = (first_dword >> 4) & 0xF;
debug_log.ofs_reg_index = first_dword & 0xF;
break;
}
opcode.opcode = debug_log;

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