/// <summary>
/// Emits arguments to a call, and returns an array of write-backs that
/// should happen after the call. For emitting dynamic expressions, we
/// need to skip the first parameter of the method (the call site).
/// </summary>
private List <WriteBack> EmitArguments(MethodBase method, IArgumentProvider args, int skipParameters)
{
ParameterInfo[] pis = method.GetParametersCached();
Debug.Assert(args.ArgumentCount + skipParameters == pis.Length);
List <WriteBack> writeBacks = null;
for (int i = skipParameters, n = pis.Length; i < n; i++)
{
ParameterInfo parameter = pis[i];
Expression argument = args.GetArgument(i - skipParameters);
Type type = parameter.ParameterType;
if (type.IsByRef)
{
type = type.GetElementType();
WriteBack wb = EmitAddressWriteBack(argument, type);
if (wb != null)
{
if (writeBacks == null)
{
writeBacks = new List <WriteBack>();
}
writeBacks.Add(wb);
}
}
else
{
EmitExpression(argument);
}
}
return(writeBacks);
}
// Emits the address of the expression, returning the write back if necessary
//
// For properties, we want to write back into the property if it's
// passed byref.
private WriteBack EmitAddressWriteBack(Expression node, Type type)
{
CompilationFlags startEmitted = EmitExpressionStart(node);
WriteBack result = null;
if (TypeUtils.AreEquivalent(type, node.Type))
{
switch (node.NodeType)
{
case ExpressionType.MemberAccess:
result = AddressOfWriteBack((MemberExpression)node);
break;
case ExpressionType.Index:
result = AddressOfWriteBack((IndexExpression)node);
break;
}
}
if (result == null)
{
EmitAddress(node, type, CompilationFlags.EmitAsNoTail | CompilationFlags.EmitNoExpressionStart);
}
EmitExpressionEnd(startEmitted);
return(result);
}
// Emits the address of the expression, returning the write back if necessary
//
// For properties, we want to write back into the property if it's
// passed byref.
private WriteBack EmitAddressWriteBack(Expression node, Type type)
{
ExpressionStart startEmitted = EmitExpressionStart(node);
WriteBack result = null;
if (type == node.Type)
{
switch (node.NodeType)
{
case ExpressionType.MemberAccess:
result = AddressOfWriteBack((MemberExpression)node);
break;
case ExpressionType.Index:
result = AddressOfWriteBack((IndexExpression)node);
break;
}
}
if (result == null)
{
EmitAddress(node, type, false);
}
EmitExpressionEnd(startEmitted);
return(result);
}
internal override void Emit(ILGenerator ilg, bool preserve)
{
Args.Emit(ilg);
Symbol.EmitGet(ilg);
if (WriteBack != null)
{
WriteBack.Emit(ilg, false);
}
if (!preserve)
{
ilg.Emit(OpCodes.Pop);
}
}
internal override void Emit(ILGenerator ilg, bool preserve)
{
if (Self != null)
{
Self.Emit(ilg);
}
Args.Emit(ilg);
Symbol.EmitGet(ilg);
if (WriteBack != null)
{
WriteBack.Emit(ilg, false);
}
if (!preserve && Datatype.NativeType != NativeType.Void)
{
ilg.Emit(OpCodes.Pop);
}
}
public void EmitSingleDataTransfer(ConditionCode conditionCode, Indexing indexing, OffsetDirection offsetDirection, TransferSize transferSize, WriteBack writeBack, TransferType transferType, int firstRegister, int destinationRegister, ShiftType secondShiftType, int secondRegister)
{
Debug.Assert(destinationRegister <= 0xF);
Debug.Assert(firstRegister <= 0xF);
Debug.Assert(secondRegister <= 0xF);
uint value = 0;
value |= (uint)(GetConditionCode(conditionCode) << 28);
value |= (uint)(1 << 26);
value |= (uint)(1 << 25);
value |= (uint)((indexing == Indexing.Post ? 0 : 1) << 24);
value |= (uint)((transferSize == TransferSize.Word ? 0 : 1) << 23);
value |= (uint)((offsetDirection == OffsetDirection.Down ? 0 : 1) << 22);
value |= (uint)((writeBack == WriteBack.NoWriteBack ? 0 : 1) << 21);
value |= (uint)((transferType == TransferType.Store ? 0 : 1) << 20);
value |= (uint)(destinationRegister << 12);
value |= (uint)(firstRegister << 16);
value |= (uint)(GetShiftTypeCode(secondShiftType) << 4);
value |= (uint)secondRegister;
Write(value);
}
public static uint EmitSingleDataTransfer(ConditionCode conditionCode, Indexing indexing, OffsetDirection offsetDirection, TransferSize transferSize, WriteBack writeBack, TransferType transferType, int firstRegister, int destinationRegister, ShiftType secondShiftType, int secondRegister)
{
Debug.Assert(destinationRegister <= 0xF);
Debug.Assert(firstRegister <= 0xF);
Debug.Assert(secondRegister <= 0xF);
uint value = 0;
value |= (uint)(GetConditionCode(conditionCode) << 28);
value |= 1 << 26;
value |= 1 << 25;
value |= (uint)((indexing == Indexing.Post ? 0 : 1) << 24);
value |= (uint)((transferSize == TransferSize.Word ? 0 : 1) << 23);
value |= (uint)((offsetDirection == OffsetDirection.Down ? 0 : 1) << 22);
value |= (uint)((writeBack == WriteBack.NoWriteBack ? 0 : 1) << 21);
value |= (uint)((transferType == TransferType.Store ? 0 : 1) << 20);
value |= (uint)(destinationRegister << 12);
value |= (uint)(firstRegister << 16);
value |= (uint)(GetShiftTypeCode(secondShiftType) << 4);
value |= (uint)secondRegister;
return(value);
}
public void EmitSingleDataTransfer(ConditionCode conditionCode, Indexing indexing, OffsetDirection offsetDirection, TransferSize transferSize, WriteBack writeBack, TransferType transferType, int firstRegister, int destinationRegister, uint immediate)
{
Debug.Assert(destinationRegister <= 0xF);
Debug.Assert(firstRegister <= 0xF);
Debug.Assert(immediate <= 0xFFF);
uint value = 0;
value |= (uint)(GetConditionCode(conditionCode) << 28);
value |= (uint)(1 << 26);
value |= (uint)(1 << 25);
value |= (uint)((indexing == Indexing.Post ? 0 : 1) << 24);
value |= (uint)((transferSize == TransferSize.Word ? 0 : 1) << 23);
value |= (uint)((offsetDirection == OffsetDirection.Down ? 0 : 1) << 22);
value |= (uint)((writeBack == WriteBack.NoWriteBack ? 0 : 1) << 21);
value |= (uint)((transferType == TransferType.Store ? 0 : 1) << 20);
value |= (uint)(destinationRegister << 12);
value |= (uint)(firstRegister << 16);
value |= (uint)immediate;
Write(value);
}
