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dmnt-cheat: Implement static math opcode.
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parent
2552c0327c
commit
68af2c1c2a
2 changed files with 46 additions and 14 deletions
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@ -68,19 +68,19 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
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case CheatVmOpcodeType_ControlLoop:
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if (cur_opcode.ctrl_loop.start_loop) {
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/* Start a loop. */
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this->registers[cur_opcode.ctrl_loop.register_index] = cur_opcode.ctrl_loop.num_iters;
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this->loop_tops[cur_opcode.ctrl_loop.register_index] = this->instruction_ptr;
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this->registers[cur_opcode.ctrl_loop.reg_index] = cur_opcode.ctrl_loop.num_iters;
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this->loop_tops[cur_opcode.ctrl_loop.reg_index] = this->instruction_ptr;
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} else {
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/* End a loop. */
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this->registers[cur_opcode.ctrl_loop.register_index]--;
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if (this->registers[cur_opcode.ctrl_loop.register_index] != 0) {
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this->instruction_ptr = this->loop_tops[cur_opcode.ctrl_loop.register_index];
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this->registers[cur_opcode.ctrl_loop.reg_index]--;
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if (this->registers[cur_opcode.ctrl_loop.reg_index] != 0) {
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this->instruction_ptr = this->loop_tops[cur_opcode.ctrl_loop.reg_index];
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}
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}
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break;
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case CheatVmOpcodeType_LoadRegisterStatic:
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/* Set a register to a static value. */
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this->registers[cur_opcode.ldr_static.register_index] = cur_opcode.ldr_static.value;
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this->registers[cur_opcode.ldr_static.reg_index] = cur_opcode.ldr_static.value;
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break;
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case CheatVmOpcodeType_LoadRegisterMemory:
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{
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@ -92,9 +92,41 @@ void DmntCheatVm::Execute(const CheatProcessMetadata *metadata) {
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/* TODO */
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}
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break;
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case CheatVmOpcodeType_PerformArithmetic:
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case CheatVmOpcodeType_PerformArithmeticStatic:
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{
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/* TODO */
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/* Do requested math. */
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switch (cur_opcode.perform_math_static.math_type) {
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case RegisterArithmeticType_Addition:
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this->registers[cur_opcode.perform_math_static.reg_index] += (u64)cur_opcode.perform_math_static.value;
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break;
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case RegisterArithmeticType_Subtraction:
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this->registers[cur_opcode.perform_math_static.reg_index] -= (u64)cur_opcode.perform_math_static.value;
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break;
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case RegisterArithmeticType_Multiplication:
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this->registers[cur_opcode.perform_math_static.reg_index] *= (u64)cur_opcode.perform_math_static.value;
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break;
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case RegisterArithmeticType_LeftShift:
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this->registers[cur_opcode.perform_math_static.reg_index] <<= (u64)cur_opcode.perform_math_static.value;
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break;
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case RegisterArithmeticType_RightShift:
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this->registers[cur_opcode.perform_math_static.reg_index] >>= (u64)cur_opcode.perform_math_static.value;
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break;
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}
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/* Apply bit width. */
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switch (cur_opcode.perform_math_static.bit_width) {
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case 1:
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this->registers[cur_opcode.perform_math_static.reg_index] = static_cast<u8>(this->registers[cur_opcode.perform_math_static.reg_index]);
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break;
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case 2:
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this->registers[cur_opcode.perform_math_static.reg_index] = static_cast<u16>(this->registers[cur_opcode.perform_math_static.reg_index]);
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break;
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case 4:
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this->registers[cur_opcode.perform_math_static.reg_index] = static_cast<u32>(this->registers[cur_opcode.perform_math_static.reg_index]);
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break;
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case 8:
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this->registers[cur_opcode.perform_math_static.reg_index] = static_cast<u64>(this->registers[cur_opcode.perform_math_static.reg_index]);
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break;
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}
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}
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break;
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case CheatVmOpcodeType_BeginKeypressConditionalBlock:
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@ -28,7 +28,7 @@ enum CheatVmOpcodeType : u32 {
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CheatVmOpcodeType_LoadRegisterStatic = 4,
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CheatVmOpcodeType_LoadRegisterMemory = 5,
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CheatVmOpcodeType_StoreToRegisterAddress = 6,
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CheatVmOpcodeType_PerformArithmetic = 7,
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CheatVmOpcodeType_PerformArithmeticStatic = 7,
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CheatVmOpcodeType_BeginKeypressConditionalBlock = 8,
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};
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@ -81,12 +81,12 @@ struct EndConditionalOpcode {};
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struct ControlLoopOpcode {
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bool start_loop;
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u32 register_index;
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u32 reg_index;
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u32 num_iters;
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};
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struct LoadRegisterStaticOpcode {
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u32 register_index;
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u32 reg_index;
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u64 value;
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};
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@ -107,11 +107,11 @@ struct StoreToRegisterAddressOpcode {
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u64 value;
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};
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struct PerformArithmeticOpcode {
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struct PerformArithmeticStaticOpcode {
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u32 bit_width;
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u32 reg_index;
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RegisterArithmeticType math_type;
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VmInt value;
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u32 value;
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};
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struct BeginKeypressConditionalOpcode {
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@ -128,7 +128,7 @@ struct CheatVmOpcode {
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LoadRegisterStaticOpcode ldr_static;
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LoadRegisterMemoryOpcode ldr_memory;
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StoreToRegisterAddressOpcode str_regaddr;
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PerformArithmeticOpcode perform_math;
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PerformArithmeticStaticOpcode perform_math_static;
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BeginKeypressConditionalOpcode begin_keypress_cond;
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};
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};
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