public static ICondition Emit(byte[] instruction, CompilationContext context)
{
// 1TMC00AA AAAAAAAA VVVVVVVV (VVVVVVVV)
// T: Width of memory write (1, 2, 4, or 8 bytes).
// M: Memory region to write to (0 = Main NSO, 1 = Heap).
// C: Condition to use, see below.
// A: Immediate offset to use from memory region base.
// V: Value to compare to.
byte operationWidth = instruction[OperationWidthIndex];
MemoryRegion memoryRegion = (MemoryRegion)instruction[MemoryRegionIndex];
Comparison comparison = (Comparison)instruction[ComparisonTypeIndex];
ulong address = InstructionHelper.GetImmediate(instruction, OffsetImmediateIndex, OffsetImmediateSize);
Pointer sourceMemory = MemoryHelper.EmitPointer(memoryRegion, address, context);
int valueSize = operationWidth <= 4 ? ValueImmediateSize4 : ValueImmediateSize8;
ulong value = InstructionHelper.GetImmediate(instruction, ValueImmediateIndex, valueSize);
Value <ulong> compareToValue = new Value <ulong>(value);
return(InstructionHelper.CreateCondition(comparison, operationWidth, sourceMemory, compareToValue));
}
public static ICondition Emit(byte[] instruction, CompilationContext context)
{
// C0TcSX##
// C0TcS0Ma aaaaaaaa
// C0TcS1Mr
// C0TcS2Ra aaaaaaaa
// C0TcS3Rr
// C0TcS400 VVVVVVVV (VVVVVVVV)
// C0TcS5X0
// T: Width of memory write(1, 2, 4, or 8 bytes).
// c: Condition to use, see below.
// S: Source Register.
// 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).
// X: Other Register(operand type 5).
// V: Value to compare to(operand type 4).
byte operationWidth = instruction[OperationWidthIndex];
Comparison comparison = (Comparison)instruction[ComparisonTypeIndex];
Register sourceRegister = context.GetRegister(instruction[SourceRegisterIndex]);
byte operandType = instruction[OperandTypeIndex];
byte registerOrMemoryRegion = instruction[RegisterOrMemoryRegionIndex];
byte offsetRegisterIndex = instruction[OffsetImmediateIndex];
ulong offsetImmediate;
ulong valueImmediate;
int valueImmediateSize;
Register addressRegister;
Register offsetRegister;
IOperand sourceOperand;
switch (operandType)
{
case MemoryRegionWithOffsetImmediate:
// *(?x + #a)
offsetImmediate = InstructionHelper.GetImmediate(instruction, OffsetImmediateIndex, OffsetImmediateSize);
sourceOperand = MemoryHelper.EmitPointer((MemoryRegion)registerOrMemoryRegion, offsetImmediate, 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);
offsetImmediate = InstructionHelper.GetImmediate(instruction, OffsetImmediateIndex, OffsetImmediateSize);
sourceOperand = MemoryHelper.EmitPointer(addressRegister, offsetImmediate, context);
break;
case AddressRegisterWithOffsetRegister:
// *($R + $r)
addressRegister = context.GetRegister(registerOrMemoryRegion);
offsetRegister = context.GetRegister(offsetRegisterIndex);
sourceOperand = MemoryHelper.EmitPointer(addressRegister, offsetRegister, context);
break;
case OffsetImmediate:
valueImmediateSize = operationWidth <= 4 ? ValueImmediateSize8 : ValueImmediateSize16;
valueImmediate = InstructionHelper.GetImmediate(instruction, ValueImmediateIndex, valueImmediateSize);
sourceOperand = new Value <ulong>(valueImmediate);
break;
case AddressRegister:
// $V
sourceOperand = context.GetRegister(registerOrMemoryRegion);
break;
default:
throw new TamperCompilationException($"Invalid operand type {operandType} in Atmosphere cheat");
}
return(InstructionHelper.CreateCondition(comparison, operationWidth, sourceRegister, sourceOperand));
}
