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Feature: Add mov_rm32_r32 instruction & more expressive execution with CPU trace

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0x221E
2026-02-05 14:57:23 +01:00
parent ac6bf8cb46
commit caadd2f706
12 changed files with 120 additions and 25 deletions
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31
src/ExecutorCases.cpp
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@@ -20,6 +20,7 @@ constexpr std::array<ExecutorCase, 255> GenerateExecutorTable(){
table[Opcode::NOP] = executor_cases::Nop;
table[Opcode::HLT] = executor_cases::Hlt;
table[Opcode::MOV_R32_IMM32] = executor_cases::Mov_r32_imm32;
table[Opcode::MOV_RM32_R32] = executor_cases::Mov_rm32_r32;
table[Opcode::ADD_RM32_R32] = executor_cases::Add_rm32_r32;
return table;
}
@@ -29,3 +30,33 @@ static constexpr std::array<ExecutorCase, 255> s_ExecutorTable = GenerateExecuto
const std::array<ExecutorCase, 255>& GetExecutorTable() {
return s_ExecutorTable;
}
namespace executor_cases::helpers {
uint32_t ResolveModRMAddress(CPUContext& cc) {
x86::ModRM modrm = cc.m_Instruction.optional.m_ModRM;
uint32_t value = 0;
switch(modrm.m_State) {
case x86::ModRMState::LR_DISP32:
case x86::ModRMState::LR_DISP8:
value = cc.m_Registers[modrm.m_Rm] + cc.m_Instruction.m_Operand1;
break;
case x86::ModRMState::DISP32:
value = cc.m_Instruction.m_Operand1;
break;
case x86::ModRMState::LR:
value = cc.m_Registers[modrm.m_Rm];
break;
case x86::ModRMState::R:
std::cout << "x86::ModRM reached x86::ModRMState::R during ResolveModRMAddress()" << std::endl;
std::cout << "This behavior is unexpected." << std::endl;
break;
default:
throw std::runtime_error("Undefined MODRM state encountered!");
}
return value;
}
}