public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
if (decodeArgumentsFunction != null)
{
decodeArgumentsFunction(this, bin, ref context, ref offset, ref instructionReference.param1, ref instructionReference.param2);
}
}
/// <summary>
/// Effectue le décodage des instructions
/// </summary>
/// <param name="bin"></param>
/// <param name="offset"></param>
/// <param name="context">Contexte de décodage. Par défaut, prend la valeur du mode actuel du CPU</param>
/// <returns></returns>
public InstructionsBin Decode(MemoryBin bin, int offset, InstructionDecodeContext context)
{
context.Source = bin;
var decodeResult = new List<InstructionReference>();
var length = bin.Length;
int originalOffset = 0;
while (offset < length)
{
var code = bin.ReadInt1(originalOffset = offset);
offset++;
var match = knownInstructions[code];
var instructionReference = new InstructionReference();
instructionReference.instruction = match;
instructionReference.offset = originalOffset;
match.DecodeArguments(bin, ref context, ref offset, ref instructionReference);
decodeResult.Add(instructionReference);
}
var result = new InstructionsBin() { DecodeContext = context, Instructions = decodeResult.ToArray() };
return result;
}
public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
switch (AddrMode)
{
case AddressingModes.ImpliedAccumulator:
{
break;
}
case AddressingModes.Absolute:
case AddressingModes.AbsoluteIndexedX:
{
instructionReference.param1 = DecodeInt2Argument(bin, ref offset);
break;
}
case AddressingModes.Direct:
case AddressingModes.DirectIndexedX:
{
instructionReference.param1 = DecodeInt1Argument(bin, ref offset);
break;
}
default:
{
throw new InvalidOperationException("Addressing mode unknown for instruction ASL");
}
}
}
public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
switch (AddrMode)
{
case AddressingModes.AbsoluteLong:
{
instructionReference.param1 = DecodeInt3Argument(bin, ref offset);
break;
}
default:
{
instructionReference.param1 = DecodeInt2Argument(bin, ref offset);
break;
}
}
}
public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
switch (AddrMode)
{
case AddressingModes.ImmediateMemoryFlag:
case AddressingModes.ImmediateIndexFlag:
case AddressingModes.Immediate8Bit:
{
instructionReference.param1 = DecodeI1I2ArgumentForMFlag(bin, ref offset, ref context);
break;
}
case AddressingModes.Absolute:
case AddressingModes.AbsoluteIndexedX:
case AddressingModes.AbsoluteIndexedY:
{
instructionReference.param1 = DecodeInt2Argument(bin, ref offset);
break;
}
case AddressingModes.AbsoluteLong:
case AddressingModes.AbsoluteIndexedLong:
{
instructionReference.param1 = DecodeInt3Argument(bin, ref offset);
break;
}
case AddressingModes.Direct:
case AddressingModes.DirectIndirect:
case AddressingModes.DirectIndirectLong:
case AddressingModes.DirectIndexedX:
case AddressingModes.DirectIndexedIndirect:
case AddressingModes.DirectIndirectIndexed:
case AddressingModes.DirectIndirectIndexedLong:
case AddressingModes.StackRelative:
case AddressingModes.StackRelativeIndirectIndexed:
{
instructionReference.param1 = DecodeInt1Argument(bin, ref offset);
break;
}
default:
{
throw new InvalidOperationException("Addressing mode unknown for instruction ADC");
}
}
}
/// <summary>
/// Decode une unique instruction à partir de l'offset spécifié dans le bin spécifié à l'aide du contexte courrant, et la stoque dans decodedInstruction
/// </summary>
/// <param name="bin"></param>
/// <param name="offset"></param>
/// <param name="context"></param>
/// <param name="decodedInstruction"></param>
public void DecodeOnce(MemoryBin bin, ref int offset, ref InstructionDecodeContext context, ref InstructionReference decodedInstruction)
{
var code = bin.ReadInt1(offset);
offset++;
var match = knownInstructions[code];
decodedInstruction.instruction = match;
decodedInstruction.offset = offset - 1;
match.DecodeArguments(bin, ref context, ref offset, ref decodedInstruction);
}
public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
/* on skip le byte suivant, qui est censé être une signature */
offset++;
}
private void EmitGoto(InstructionReference reference)
{
_emitter.Emit(OpCodes.Br, reference);
}
/// <summary>
/// Exécute une seule instruction en partant de l'addresse spécifiée
/// </summary>
/// <param name="bin">Mémoire à utiliser pour la référence</param>
/// <param name="startAddress">Adresse, ou rien pour utiliser le PC actuel</param>
public void RunOnce(MemoryBin bin, int startAddress = -1)
{
if (bin == null)
throw new ArgumentNullException("bin");
if (startAddress >= 0)
platform.CPU.PC = startAddress;
var refInstruction = new InstructionReference();
var context = platform.CPU.BuildCurrentContext();
platform.Decoder.DecodeOnce(bin, ref platform.CPU.PC, ref context, ref refInstruction);
refInstruction.instruction.Run(refInstruction.param1, refInstruction.param2);
}
private void WrappedInterpretThreadFunction()
{
try
{
var currentInstruction = new InstructionReference();
var currentContext = platform.CPU.BuildCurrentContext();
var cpu = platform.CPU;
var decoder = platform.Decoder;
while (!stop)
{
// On pourrait peut être le mettre en cache et je màj uniquement
// après une instruction qui le modifie
cpu.UpdateCurrentContext(ref currentContext);
decoder.DecodeOnce(interpreterMemory, ref cpu.PC, ref currentContext, ref currentInstruction);
if (trace)
{
Debug.WriteLine(currentInstruction.StringRepresentation());
}
currentInstruction.instruction.Run(currentInstruction.param1, currentInstruction.param2);
}
}
finally
{
interpreting = false;
}
}
List <Instruction> EmitCall()
{
var invoke_method = _hook_field.FieldType.Resolve().Method("Invoke");
VariableDefinition
local_field_instance = new VariableDefinition(invoke_method.ReturnType)
;
InstructionReference
call_invoke = new InstructionReference(),
store_result = new InstructionReference()
;
bool has_return_type = invoke_method.ReturnType.FullName != "System.Void";
if (this._is_cancellable)
{
_variables.Add(local_field_instance);
return(AnonymousExtensions.ParseAnonymousInstruction(
new { OpCodes.Ldsfld, _hook_field },
new { OpCodes.Dup },
new { OpCodes.Brtrue_S, call_invoke },
new { OpCodes.Pop },
new { OpCodes.Ldc_I4_1 },
new { OpCodes.Br_S, store_result },
new Func <IEnumerable <object> >(() =>
{
IEnumerable <object> collection = null;
if (this._parameters.Count() > 0)
{
var first = this._parameters.First();
call_invoke = call_invoke.Create(
_is_by_reference && first.ParameterType.IsValueType ? OpCodes.Ldarga : OpCodes.Ldarg,
first
);
collection = new object[]
{
call_invoke,
this._parameters.Skip(1)
.Select(x => new {
OpCode = _is_by_reference && x.ParameterType.IsValueType ? OpCodes.Ldarga : OpCodes.Ldarg,
Operand = x
}),
// adds the return result
new Func <IEnumerable <object> >(() =>
{
if (_result_variable != null)
{
return new [] {
new {
OpCode = _is_by_reference ? OpCodes.Ldloca : OpCodes.Ldloc,
_result_variable
}
};
}
return Enumerable.Empty <object>();
}).Invoke(),
new { OpCodes.Callvirt, invoke_method }
};
}
else
{
collection = new object[]
{
// adds the return result
new Func <IEnumerable <object> >(() =>
{
if (_result_variable != null)
{
return new object [] {
call_invoke = call_invoke.Create(
_is_by_reference ? OpCodes.Ldloca : OpCodes.Ldloc,
_result_variable
),
new { OpCodes.Callvirt, invoke_method }
};
}
else
{
return new []
{
call_invoke = call_invoke.Create(OpCodes.Callvirt, invoke_method)
};
}
}).Invoke()
};
}
return collection;
}).Invoke(),
store_result = store_result.Create(OpCodes.Stloc, local_field_instance),
new
{
OpCodes.Ldloc,
local_field_instance
}
).ToList());
}
else
{
return(AnonymousExtensions.ParseAnonymousInstruction(
new { OpCodes.Ldsfld, _hook_field },
new { OpCodes.Dup },
new { OpCodes.Brtrue_S, call_invoke },
new { OpCodes.Pop },
new { OpCodes.Br_S, store_result },
new Func <IEnumerable <object> >(() =>
{
IEnumerable <object> collection = null;
if (this._parameters.Count() > 0)
{
var first = this._parameters.First();
call_invoke = call_invoke.Create(
_is_by_reference && first.ParameterType.IsValueType ? OpCodes.Ldarga : OpCodes.Ldarg,
first
);
collection = new object[]
{
call_invoke,
this._parameters.Skip(1)
.Select(x => new {
OpCode = _is_by_reference && x.ParameterType.IsValueType? OpCodes.Ldarga : OpCodes.Ldarg,
Operand = x
}),
// adds the return result
new Func <IEnumerable <object> >(() =>
{
if (_result_variable != null)
{
return new [] {
new {
OpCode = _is_by_reference ? OpCodes.Ldloca : OpCodes.Ldloc,
_result_variable
}
};
}
return Enumerable.Empty <object>();
}).Invoke(),
//new { OpCodes.Callvirt, invoke_method }
new Func <IEnumerable <object> >(() =>
{
IEnumerable <object> res = new [] {
new { OpCodes.Callvirt, invoke_method }
};
if (has_return_type)
{
res = res.Concat(new[]
{
new { OpCodes.Pop }
});
}
return res;
}).Invoke()
};
}
else
{
//collection = new object[]
//{
// new Func<IEnumerable<object>>(() =>
// {
// IEnumerable<object> res;
if (_result_variable != null)
{
collection = new object[] {
call_invoke = call_invoke.Create(
_is_by_reference ? OpCodes.Ldloca : OpCodes.Ldloc,
_result_variable
),
new { OpCodes.Callvirt, invoke_method }
};
}
else
{
collection = new[]
{
call_invoke = call_invoke.Create(OpCodes.Callvirt, invoke_method)
};
}
if (has_return_type)
{
collection = collection.Concat(new[]
{
new { OpCodes.Pop }
});
}
// return res;
// }).Invoke()
//};
}
return collection;
}).Invoke(),
store_result = store_result.Create(
OpCodes.Nop // invoke_method.ReturnType.FullName == "System.Void" ? OpCodes.Nop : OpCodes.Pop
)
).ToList());
}
}
/// <summary>
/// Ecrit une instruction. C'est un peut chiant car il faut spécifier à la fois l'instruction, l'addrMode, le type des args et les args mais bon,
/// pour l'instant ça devrait faire l'affaire
/// </summary>
/// <param name="bin"></param>
/// <param name="offset"></param>
/// <param name="opCode"></param>
/// <param name="addrMode"></param>
/// <param name="param1Type"></param>
/// <param name="param1"></param>
/// <param name="param2"></param>
public void Write(MemoryBin bin, ref int offset, OpCodes opCode, AddressingModes addrMode = AddressingModes.Direct, ArgumentType param1Type = ArgumentType.I1, int param1 = 0, int param2 = 0)
{
var originalOffset = offset;
/* d'abord, on cherche l'instruction */
Instruction match_instruction = null;
var match_code = from instruction in cpu.DecodeTable.KnownInstructions where instruction.Code == opCode select instruction;
switch(match_code.Count())
{
case 0: throw new InvalidOperationException(String.Format("Instruction not found : {0}", opCode));
case 1: {
/* on se prend pas la tête sur le mode d'addr */
match_instruction = match_code.First();
break;
}
default:
{
/* on cherche le bon mode */
match_instruction = (from code_item in match_code where code_item.AddrMode == addrMode select code_item).FirstOrDefault();
if(match_instruction== null)
throw new InvalidOperationException(String.Format("Instruction {0} was found, but the addrMode {1} has no binding", opCode, addrMode));
break;
}
}
/* on écrit le code */
bin.WriteInt1(offset, match_instruction.AssociatedHexCode);
offset++;
/* s'il y a des arguments, on les écrit */
if (match_instruction.HaveArgs)
{
WriteParameter(bin, ref offset, param1Type, param1);
if (addrMode == AddressingModes.BlockMove)
{
/* c'est le seul mode qui a deux arguments, et il a la même
* taille que le premier argument
* */
WriteParameter(bin, ref offset, param1Type, param2);
}
}
if (enableInstructionValidation)
{
/* on vérifie l'instruction écrite */
var instructionDecode = new InstructionReference();
var context = cpu.BuildCurrentContext();
cpu.Platform.Decoder.DecodeOnce(bin, ref originalOffset, ref context, ref instructionDecode);
if (instructionDecode.instruction.Code != opCode ||
instructionDecode.param1 != param1 ||
instructionDecode.param2 != param2)
{
throw new InvalidProgramException(String.Format("Instruction decode mismatch.\r\nEncoded:{0}({1},{2}) [{3}]\r\nDecoded:{4}({5},{6}) [{7}]",
opCode,
param1, param2,
addrMode,
instructionDecode.instruction.Code,
instructionDecode.param1, instructionDecode.param2,
instructionDecode.instruction.AddrMode));
}
else if (originalOffset != offset)
{
throw new InvalidProgramException(String.Format("Instruction decode mismatch, Invalid offset. Difference : {0}", offset - originalOffset));
}
}
}
public ForStatement()
{
AfterRefence = new InstructionReference();
BodyReference = new InstructionReference();
ConditionalReference = new InstructionReference();
}
public override void DecodeArguments(Memory.MemoryBin bin, ref InstructionDecodeContext context, ref int offset, ref InstructionReference instructionReference)
{
/* No Args */
}
public IfStatement(Expression condition, Statement body)
{
Condition = condition;
Body = body;
AfterRefence = new InstructionReference();
}