private const byte Rsh = 4; // reg >>= rhs
public static void Emit(byte[] instruction, CompilationContext context)
{
// 7T0RC000 VVVVVVVV
// T: Width of arithmetic operation(1, 2, 4, or 8 bytes).
// R: Register to apply arithmetic to.
// C: Arithmetic operation to apply, see below.
// V: Value to use for arithmetic operation.
byte operationWidth = instruction[OperationWidthIndex];
Register register = context.GetRegister(instruction[DestinationRegisterIndex]);
byte operation = instruction[OperationTypeIndex];
ulong immediate = InstructionHelper.GetImmediate(instruction, ValueImmediateIndex, ValueImmediateSize);
Value <ulong> rightHandSideValue = new Value <ulong>(immediate);
void Emit(Type operationType)
{
InstructionHelper.Emit(operationType, operationWidth, context, register, register, rightHandSideValue);
}
switch (operation)
{
case Add: Emit(typeof(OpAdd <>)); break;
case Sub: Emit(typeof(OpSub <>)); break;
case Mul: Emit(typeof(OpMul <>)); break;
case Lsh: Emit(typeof(OpLsh <>)); break;
case Rsh: Emit(typeof(OpRsh <>)); break;
default:
throw new TamperCompilationException($"Invalid arithmetic operation {operation} in Atmosphere cheat");
}
}
public static void Emit(byte[] instruction, CompilationContext context)
{
// FFFTIX##
// FFFTI0Ma aaaaaaaa
// FFFTI1Mr
// FFFTI2Ra aaaaaaaa
// FFFTI3Rr
// FFFTI4V0
// T: Width of memory write (1, 2, 4, or 8 bytes).
// I: Log id.
// X: Operand Type, see below.
// M: Memory Type (operand types 0 and 1).
// R: Address Register (operand types 2 and 3).
// a: Relative Address (operand types 0 and 2).
// r: Offset Register (operand types 1 and 3).
// V: Value Register (operand type 4).
byte operationWidth = instruction[OperationWidthIndex];
byte logId = instruction[LogIdIndex];
byte operandType = instruction[OperandTypeIndex];
byte registerOrMemoryRegion = instruction[RegisterOrMemoryRegionIndex];
byte offsetRegisterIndex = instruction[OffsetRegisterOrImmediateIndex];
ulong immediate;
Register addressRegister;
Register offsetRegister;
IOperand sourceOperand;
switch (operandType)
{
case MemoryRegionWithOffsetImmediate:
// *(?x + #a)
immediate = InstructionHelper.GetImmediate(instruction, OffsetRegisterOrImmediateIndex, OffsetImmediateSize);
sourceOperand = MemoryHelper.EmitPointer((MemoryRegion)registerOrMemoryRegion, immediate, context);
break;
case MemoryRegionWithOffsetRegister:
// *(?x + $r)
offsetRegister = context.GetRegister(offsetRegisterIndex);
sourceOperand = MemoryHelper.EmitPointer((MemoryRegion)registerOrMemoryRegion, offsetRegister, context);
break;
case AddressRegisterWithOffsetImmediate:
// *($R + #a)
addressRegister = context.GetRegister(registerOrMemoryRegion);
immediate = InstructionHelper.GetImmediate(instruction, OffsetRegisterOrImmediateIndex, OffsetImmediateSize);
sourceOperand = MemoryHelper.EmitPointer(addressRegister, immediate, context);
break;
case AddressRegisterWithOffsetRegister:
// *($R + $r)
addressRegister = context.GetRegister(registerOrMemoryRegion);
offsetRegister = context.GetRegister(offsetRegisterIndex);
sourceOperand = MemoryHelper.EmitPointer(addressRegister, offsetRegister, context);
break;
case ValueRegister:
// $V
sourceOperand = context.GetRegister(registerOrMemoryRegion);
break;
default:
throw new TamperCompilationException($"Invalid operand type {operandType} in Atmosphere cheat");
}
InstructionHelper.Emit(typeof(OpLog <>), operationWidth, context, logId, sourceOperand);
}
private const byte Mov = 9; // lhs (discards right-hand operand)
public static void Emit(byte[] instruction, CompilationContext context)
{
// 9TCRS0s0
// T: Width of arithmetic operation(1, 2, 4, or 8 bytes).
// C: Arithmetic operation to apply, see below.
// R: Register to store result in.
// S: Register to use as left - hand operand.
// s: Register to use as right - hand operand.
// 9TCRS100 VVVVVVVV (VVVVVVVV)
// T: Width of arithmetic operation(1, 2, 4, or 8 bytes).
// C: Arithmetic operation to apply, see below.
// R: Register to store result in.
// S: Register to use as left - hand operand.
// V: Value to use as right - hand operand.
byte operationWidth = instruction[OperationWidthIndex];
byte operation = instruction[OperationTypeIndex];
Register destinationRegister = context.GetRegister(instruction[DestinationRegisterIndex]);
Register leftHandSideRegister = context.GetRegister(instruction[LeftHandSideRegisterIndex]);
byte rightHandSideIsImmediate = instruction[UseImmediateAsRhsIndex];
IOperand rightHandSideOperand;
switch (rightHandSideIsImmediate)
{
case 0:
// Use a register as right-hand side.
rightHandSideOperand = context.GetRegister(instruction[RightHandSideRegisterIndex]);
break;
case 1:
// Use an immediate as right-hand side.
int immediateSize = operationWidth <= 4 ? RightHandSideImmediate8 : RightHandSideImmediate16;
ulong immediate = InstructionHelper.GetImmediate(instruction, RightHandSideImmediateIndex, immediateSize);
rightHandSideOperand = new Value <ulong>(immediate);
break;
default:
throw new TamperCompilationException($"Invalid right-hand side switch {rightHandSideIsImmediate} in Atmosphere cheat");
}
void Emit(Type operationType, IOperand rhs = null)
{
List <IOperand> operandList = new List <IOperand>();
operandList.Add(destinationRegister);
operandList.Add(leftHandSideRegister);
if (rhs != null)
{
operandList.Add(rhs);
}
InstructionHelper.Emit(operationType, operationWidth, context, operandList.ToArray());
}
switch (operation)
{
case Add: Emit(typeof(OpAdd <>), rightHandSideOperand); break;
case Sub: Emit(typeof(OpSub <>), rightHandSideOperand); break;
case Mul: Emit(typeof(OpMul <>), rightHandSideOperand); break;
case Lsh: Emit(typeof(OpLsh <>), rightHandSideOperand); break;
case Rsh: Emit(typeof(OpRsh <>), rightHandSideOperand); break;
case And: Emit(typeof(OpAnd <>), rightHandSideOperand); break;
case Or: Emit(typeof(OpOr <>), rightHandSideOperand); break;
case Not: Emit(typeof(OpNot <>)); break;
case Xor: Emit(typeof(OpXor <>), rightHandSideOperand); break;
case Mov: Emit(typeof(OpMov <>)); break;
default:
throw new TamperCompilationException($"Invalid arithmetic operation {operation} in Atmosphere cheat");
}
}