/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if divide operands are floating point numbers or if attempting to divide 64-bit numbers.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// Thrown if either operand is < 4 bytes long.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
StackItem testItem = conversionState.CurrentStackFrame.Stack.Pop();
if (testItem.isFloat)
{
//TODO - Support floats
throw new NotSupportedException("Switch for floats no supported!");
}
else if (testItem.sizeOnStackInBytes != 4)
{
//TODO - Support other sizes
throw new NotSupportedException("Switch for non-int32s not supported!");
}
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
for (int i = 0; i < theOp.ValueBytes.Length / 4; i++)
{
int branchOffset = theOp.NextOffset + Utilities.ReadInt32(theOp.ValueBytes, i * 4);
ILOp opToGoTo = conversionState.Input.At(branchOffset);
int branchPos = conversionState.PositionOf(opToGoTo);
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src2 = i.ToString(), Src1 = "$t0", DestILPosition = branchPos
});
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
if (theOp.IsDebugOp)
{
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Debug", IsDebugOp = true
});
conversionState.Append(new ASMOps.Nop());
//conversionState.Append(new ASMOps.Int() { IntNum = "3" });
}
else
{
conversionState.Append(new ASMOps.Nop());
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if constant is a floating point number.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID);
Type elementType = null;
bool pushValue = true;
int sizeToPush = 4;
bool signExtend = true;
bool isFloat = false;
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Ldelem:
{
signExtend = false;
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
}
break;
case OpCodes.Ldelema:
{
signExtend = false;
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
pushValue = false;
}
break;
case OpCodes.Ldelem_R4:
case OpCodes.Ldelem_R8:
//TODO - Add more LdElem op variants support
throw new NotSupportedException("Ldelem op variant not supported yet!");
case OpCodes.Ldelem_I1:
sizeToPush = 1;
elementType = typeof(sbyte);
break;
case OpCodes.Ldelem_I2:
sizeToPush = 2;
elementType = typeof(Int16);
break;
case OpCodes.Ldelem_U1:
sizeToPush = 1;
signExtend = false;
elementType = typeof(byte);
break;
case OpCodes.Ldelem_U2:
sizeToPush = 2;
signExtend = false;
elementType = typeof(UInt16);
break;
case OpCodes.Ldelem_Ref:
signExtend = false;
elementType = null;
break;
case OpCodes.Ldelem_U4:
signExtend = false;
elementType = typeof(UInt32);
break;
case OpCodes.Ldelem_I4:
elementType = typeof(Int32);
break;
case OpCodes.Ldelem_I8:
sizeToPush = 8;
elementType = typeof(Int64);
break;
}
if (isFloat)
{
//TODO - Support floats
throw new NotSupportedException("LdElem for floats not supported yet!");
}
//Get element from array and push the value onto the stack
// (or for LdElemA push the address of the value)
//This involves:
// 1. Check array reference is not null
// - If it is, throw NullReferenceException
// 2. Check array element type is correct
// - If not, throw ArrayTypeMismatchException
// 3. Check index to get is > -1 and < array length
// - If not, throw IndexOutOfRangeException
// 4. Calculate address of element
// 5. Push the element onto the stack
//Stack setup upon entering this op: (top-most downwards)
// 0. Index of element to get as Int32 (word)
// 1. Array object reference as address (word)
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
// 1. Check array reference is not null
// 1.1. Move array ref into $t0
// 1.2. Compare $t0 (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 1.1. Move array ref into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "4($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 1.2. Compare $t0 (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", BranchType = ASMOps.BranchOp.BranchNotZero, DestILPosition = currOpPosition, Extension = "Continue1", UnsignedTest = true
});
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue1"
});
// 2. Check array element type is correct
// 2.1. Move element type ref into $t0
// 2.2. Move element type ref from array object into $t1
// 2.3. Compare $t0 to $t1
// 2.4. If the same, jump to continue execution further down
// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//string ContinueExecutionLabel2 = ContinueExecutionLabelBase + "2";
//// 2.1. Move element type ref into $t0
int elemTypeOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "elemType").OffsetInBytes;
// 3. Check index to get is > -1 and < array length
// 3.1. Move index into $t0
// 3.2. Move array length into $t1
// 3.2. Compare $t0 to 0
// 3.3. Jump if greater than to next test condition (3.5)
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.5. Compare $t0 to $t1
// 3.6. Jump if less than to continue execution further down
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.1. Move index into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 3.2. Move array length into $t2
// - Calculate the offset of the field from the start of the array object
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
// - Move array ref into $t1
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "4($sp)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// - Move length value (offset($t1)) into $t1
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = lengthOffset.ToString() + "($t1)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t1", "$t1", lengthOffset, 4);
// 3.2. Compare $t0 to 0
// 3.3. Jump if greater than to next test condition (3.5)
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", Src2 = "$zero", BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, DestILPosition = currOpPosition, Extension = "Continue3_1", UnsignedTest = false
});
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.5. Compare $t0 to $t1
// 3.6. Jump if less than to continue execution further down
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", Src2 = "$t1", BranchType = ASMOps.BranchOp.BranchLessThan, DestILPosition = currOpPosition, Extension = "Continue3_2", UnsignedTest = false
});
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_2"
});
// 4. Calculate address of element
// 4.1. Pop index into $t1
// 4.2. Pop array ref into $t0
// 4.3. Move element type ref (from array ref) into $t0
// 4.4. Move IsValueType (from element ref type) into $t2
// 4.5. If IsValueType, continue to 4.6., else goto 4.8.
// 4.6. Move Size (from element type ref) into $t0
// 4.7. Skip over 4.8.
// 4.8. Move StackSize (from element type ref) into $t0
// 4.9. Mulitply $t0 by $t1 (index by element size)
// 4.10. Move array ref into $t1
// 4.11. Add enough to go past Kernel.FOS_System.Array fields
// 4.12. Add $t0 and $t1 (array ref + fields + (index * element size))
// 4.1. Pop index into $t1
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
// 4.2. Move array ref into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 4.3. Move element type ref (from array ref) into $t0
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = elemTypeOffset.ToString() + "($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", elemTypeOffset, 4);
// 4.4. Move IsValueType (from element ref type) into $t2
int isValueTypeOffset = conversionState.GetTypeFieldOffset("IsValueType");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t2", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Byte, Src = isValueTypeOffset.ToString() + "($t0)", Dest = "$t2", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t2", isValueTypeOffset, 1);
// 4.5. If IsValueType, continue to 4.6., else goto 4.8.
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t2", BranchType = ASMOps.BranchOp.BranchZero, DestILPosition = currOpPosition, Extension = "Continue4_1", UnsignedTest = true
});
// 4.6. Move Size (from element type ref) into $t0
int sizeOffset = conversionState.GetTypeFieldOffset("Size");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = sizeOffset.ToString() + "($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", sizeOffset, 4);
// 4.7. Skip over 4.8.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "Continue4_2"
});
// 4.8. Move StackSize (from element type ref) into $t0
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_1"
});
int stackSizeOffset = conversionState.GetTypeFieldOffset("StackSize");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = stackSizeOffset + "($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", stackSizeOffset, 4);
// 4.9. Mulitply $t0 by $t1 (index by element size)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_2"
});
conversionState.Append(new ASMOps.Mul()
{
Src1 = "$t1", Src2 = "$t0", Signed = true
});
// 4.10. Pop array ref into $t1
conversionState.Append(new ASMOps.Mflo()
{
Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
// 4.11. Add enough to go past Kernel.FOS_System.Array fields
int allFieldsOffset = 0;
#region Offset calculation
{
Types.FieldInfo highestOffsetFieldInfo = arrayTypeInfo.FieldInfos.Where(x => !x.IsStatic).OrderByDescending(x => x.OffsetInBytes).First();
Types.TypeInfo fieldTypeInfo = conversionState.TheILLibrary.GetTypeInfo(highestOffsetFieldInfo.UnderlyingInfo.FieldType);
allFieldsOffset = highestOffsetFieldInfo.OffsetInBytes + (fieldTypeInfo.IsValueType ? fieldTypeInfo.SizeOnHeapInBytes : fieldTypeInfo.SizeOnStackInBytes);
}
#endregion
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t1", Src2 = allFieldsOffset.ToString(), Dest = "$t1"
});
// 4.12. Add $t0 and $t1 (array ref + fields + (index * element size))
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t1", Src2 = "$t0", Dest = "$t0"
});
// 5. Push the element onto the stack
// 5.1. Push value at ($t0) (except for LdElemA op in which case just push address)
if (pushValue)
{
switch (sizeToPush)
{
case 1:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Byte, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 1, signExtend);
break;
case 2:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Halfword, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 2, signExtend);
break;
case 4:
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 4);
break;
case 8:
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 4);
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "4($t0)", Dest = "$t2", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t2", 4, 4);
break;
}
if (sizeToPush == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t2"
});
}
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t1"
});
}
else
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
}
// 5.2. Pop index and array ref from our stack
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
// 5.3. Push element onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
sizeOnStackInBytes = sizeToPush > 4 ? 8 : 4,
isFloat = isFloat,
isNewGCObject = false,
isGCManaged = pushValue ? (elementType == null || conversionState.TheILLibrary.GetTypeInfo(elementType).IsGCManaged) : false
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if any argument or the return value is a floating point number.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
MethodBase methodToCall = theOp.MethodToCall;
Types.MethodInfo methodToCallInfo = conversionState.TheILLibrary.GetMethodInfo(methodToCall);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID);
//The method to call is a method base
//A method base can be either a method info i.e. a normal method
//or a constructor method. The two types are treated separately.
if (methodToCall is MethodInfo)
{
//Need to do callvirt related stuff to load address of method to call
// - Check for invoke of a delegate - if so, treat rather differently from normal callvirt
if (typeof(Delegate).IsAssignableFrom(((MethodInfo)methodToCall).DeclaringType))
{
//Callvirt to delegate method
// - We only support calls to Invoke at the moment
if (methodToCall.Name != "Invoke")
{
throw new NotSupportedException("Callvirt to Delegate method not supported! Method name: " + methodToCall.Name);
}
int bytesForAllParams = ((MethodInfo)methodToCall).GetParameters().Select(x => conversionState.TheILLibrary.GetTypeInfo(x.ParameterType).SizeOnStackInBytes).Sum();
// - Move into $t0 address of function to call from stack - delegate reference is function pointer
//All the parameters for the method that was called
List <Type> allParams = ((MethodInfo)methodToCall).GetParameters().Select(x => x.ParameterType).ToList();
int bytesForParams = allParams.Select(x => conversionState.TheILLibrary.GetTypeInfo(x).SizeOnStackInBytes).Sum();
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = bytesForParams + "($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
//Allocate space on the stack for the return value as necessary
Type retType = ((MethodInfo)methodToCall).ReturnType;
Types.TypeInfo retTypeInfo = conversionState.TheILLibrary.GetTypeInfo(retType);
StackItem returnItem = new StackItem()
{
isFloat = Utilities.IsFloat(retType),
sizeOnStackInBytes = retTypeInfo.SizeOnStackInBytes,
isGCManaged = retTypeInfo.IsGCManaged,
isValue = retTypeInfo.IsValueType
};
//We do not push the return value onto the stack unless it has size > 0
//We do not push the return value onto our stack at this point - it is pushed after the call is done
if (returnItem.sizeOnStackInBytes != 0)
{
if (returnItem.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Cannot handle float return values!");
}
else if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
}
else
{
throw new NotSupportedException("Invalid return stack operand size!");
}
}
//Append the actual call
conversionState.Append(new ASMOps.Call()
{
Target = "$t0"
});
//After a call, we need to remove the return value and parameters from the stack
//This is most easily done by just adding the total number of bytes for params and
//return value to the stack pointer ($sp register).
//Stores the number of bytes to add
// - Initially at least 4 for the delegate (method) ref/pointer
int bytesToAdd = 4;
//Go through all params that must be removed
foreach (Type aParam in allParams)
{
//Pop the paramter off our stack
//(Note: Return value was never pushed onto our stack. See above)
conversionState.CurrentStackFrame.Stack.Pop();
//Add the size of the paramter to the total number of bytes to pop
bytesToAdd += conversionState.TheILLibrary.GetTypeInfo(aParam).SizeOnStackInBytes;
}
//If there is a return value on the stack
if (returnItem.sizeOnStackInBytes != 0)
{
//We need to store the return value then pop all the params
//We now push the return value onto our stack as,
//after all is said and done below, it will be the
//top item on the stack
conversionState.CurrentStackFrame.Stack.Push(returnItem);
//SUPPORT - floats (with above)
//Pop the return value into the $t0 register
//We will push it back on after params are skipped over.
if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
}
}
//Skip over the params
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = bytesToAdd.ToString(), Dest = "$sp"
});
//If necessary, push the return value onto the stack.
if (returnItem.sizeOnStackInBytes != 0)
{
//SUPPORT - floats (with above)
//The return value was stored in $t0
//So push it back onto the stack
if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
}
}
}
else
{
//Normal callvirt
// - Get object ref from loaded args
// - Check object ref not null
// - Get type table entry from object ref
// - Get method table from type table entry
// - Scan method table for the method we want
// - If found, load method address
// - Else, check for parent type method table
// - If no parent type method table, throw exception
// - Else, scan parent type method table
string methodIDValueWanted = methodToCallInfo.IDValue.ToString();
int currOpPosition = conversionState.PositionOf(theOp);
Types.TypeInfo declaringTypeInfo = conversionState.TheILLibrary.GetTypeInfo(methodToCall.DeclaringType);
//DB_Type declaringDBType = DebugDatabase.GetType(conversionState.GetTypeID(methodToCall.DeclaringType));
//Get object ref
int bytesForAllParams = ((MethodInfo)methodToCall).GetParameters().Select(x => conversionState.TheILLibrary.GetTypeInfo(x.ParameterType).SizeOnStackInBytes).Sum();
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = bytesForAllParams + "($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
//Check object ref
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotZero, Src1 = "$t0", Src2 = "$zero", DestILPosition = currOpPosition, Extension = "NotNull"
});
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotNull"
});
//Get type ref
int typeOffset = conversionState.TheILLibrary.GetFieldInfo(declaringTypeInfo, "_Type").OffsetInBytes;
//conversionState.Append(new ASMOps.La() { Dest = "$t1", Label = "type_Testing1_String" });
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = typeOffset.ToString() + "($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", typeOffset, 4);
//Get method table ref
int methodTablePtrOffset = conversionState.GetTypeFieldOffset("MethodTablePtr");
//conversionState.Append(new ASMOps.La() { Dest = "$t0", Label = "type_Testing1_String_MethodTable" });
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = methodTablePtrOffset.ToString() + "($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", methodTablePtrOffset, 4);
//Loop through entries
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "LoopMethodTable"
});
//Load ID Val for current entry
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 4);
//Compare to wanted ID value
conversionState.Append(new ASMOps.Mov()
{
Src = methodIDValueWanted, Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//If equal, load method address into $t0
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotEqual, Src1 = "$t1", Src2 = "$t4", DestILPosition = currOpPosition, Extension = "NotEqual"
});
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "4($t0)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", 4, 4);
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "Call"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotEqual"
});
//Else, compare to 0 to check for end of table
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchZero, Src1 = "$t1", DestILPosition = currOpPosition, Extension = "EndOfTable"
});
//Not 0? Move to next entry then loop again
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t0", Src2 = "8", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "LoopMethodTable"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "EndOfTable"
});
//Compare address value to 0
//If not zero, there is a parent method table to check
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "4($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 4, 4);
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchZero, Src1 = "$t1", DestILPosition = currOpPosition, Extension = "NotFound"
});
//Load parent method table and loop
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t1", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "LoopMethodTable"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotFound"
});
//Throw exception!
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Call"
});
//Allocate space on the stack for the return value as necessary
Type retType = ((MethodInfo)methodToCall).ReturnType;
Types.TypeInfo retTypeInfo = conversionState.TheILLibrary.GetTypeInfo(retType);
StackItem returnItem = new StackItem()
{
isFloat = Utilities.IsFloat(retType),
sizeOnStackInBytes = retTypeInfo.SizeOnStackInBytes,
isGCManaged = retTypeInfo.IsGCManaged,
isValue = retTypeInfo.IsValueType
};
//We do not push the return value onto the stack unless it has size > 0
//We do not push the return value onto our stack at this point - it is pushed after the call is done
if (returnItem.sizeOnStackInBytes != 0)
{
if (returnItem.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Cannot handle float return values!");
}
else if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
}
else
{
throw new NotSupportedException("Invalid return stack operand size!");
}
}
//Append the actual call
conversionState.Append(new ASMOps.Call()
{
Target = "$t0"
});
//After a call, we need to remove the return value and parameters from the stack
//This is most easily done by just adding the total number of bytes for params and
//return value to the stack pointer ($sp register).
//Stores the number of bytes to add
int bytesToAdd = 0;
//All the parameters for the method that was called
List <Type> allParams = ((MethodInfo)methodToCall).GetParameters().Select(x => x.ParameterType).ToList();
//Go through each one
if (!methodToCall.IsStatic)
{
allParams.Insert(0, methodToCall.DeclaringType);
}
foreach (Type aParam in allParams)
{
//Pop the parameter off our stack
//(Note: Return value was never pushed onto our stack. See above)
conversionState.CurrentStackFrame.Stack.Pop();
//Add the size of the parameter to the total number of bytes to pop
bytesToAdd += conversionState.TheILLibrary.GetTypeInfo(aParam).SizeOnStackInBytes;
}
//If the number of bytes to add to skip over params is > 0
if (bytesToAdd > 0)
{
//If there is a return value on the stack
if (returnItem.sizeOnStackInBytes != 0)
{
//We need to store the return value then pop all the params
//We now push the return value onto our stack as,
//after all is said and done below, it will be the
//top item on the stack
conversionState.CurrentStackFrame.Stack.Push(returnItem);
//SUPPORT - floats (with above)
//Pop the return value into the $t0 register
//We will push it back on after params are skipped over.
if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
}
}
//Skip over the params
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = bytesToAdd.ToString(), Dest = "$sp"
});
//If necessary, push the return value onto the stack.
if (returnItem.sizeOnStackInBytes != 0)
{
//SUPPORT - floats (with above)
//The return value was stored in $t0
//So push it back onto the stack
if (returnItem.sizeOnStackInBytes == 4)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
}
else if (returnItem.sizeOnStackInBytes == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
}
}
}
//No params to skip over but we might still need to store return value
else if (returnItem.sizeOnStackInBytes != 0)
{
//The return value will be the top item on the stack.
//So all we need to do is push the return item onto our stack.
conversionState.CurrentStackFrame.Stack.Push(returnItem);
}
}
}
else if (methodToCall is ConstructorInfo)
{
throw new NotSupportedException("How the hell are we getting callvirts to constructor methods?!");
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if field to load is a floating value or the field to load
/// is not of size 4 or 8 bytes.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
conversionState.CurrentStackFrame.Stack.Pop();
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
// 1. Check array reference is not null
// 1.1. Move array ref into eax
// 1.2. Compare eax (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 2. Load array length
// 1.1. Move array ref into eax
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP]", Dest = "EAX"
});
// 1.2. Compare eax (array ref) to 0
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotZero, DestILPosition = currOpPosition, Extension = "ContinueExecution1"
});
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ContinueExecution1"
});
//2. Load array length
// - Pop array ref
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
// - Load length from array ref
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ECX+" + lengthOffset.ToString() + "]", Dest = "EAX"
});
// - Push array length
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false,
isValue = true
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if compare operands are floating point numbers or if either value is < 4 bytes in length or
/// operands are not of the same size.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Pop in reverse order to push
StackItem itemB = conversionState.CurrentStackFrame.Stack.Pop();
StackItem itemA = conversionState.CurrentStackFrame.Stack.Pop();
int currOpPosition = conversionState.PositionOf(theOp);
if (itemB.isFloat || itemA.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Compare floats is unsupported!");
}
else if (itemA.sizeOnStackInBytes == 4 && itemB.sizeOnStackInBytes == 4)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//If A != B, jump to Else (not-true case)
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotEqual, Src1 = "$t0", Src2 = "$t1", DestILPosition = currOpPosition, Extension = "Else"
});
//Otherwise, A = B, so push true (true=1)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Dest = "$t4", Src = "1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t4"
});
//And then jump to the end of this IL op.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
//Insert the Else label.
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Else"
});
//Else case - Push false (false=0)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
//Push the result onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false
});
}
else if (itemA.sizeOnStackInBytes == 8 && itemB.sizeOnStackInBytes == 8)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//If A high bytes = B high bytes : Check, if A low bytes = B low bytes : True
//Else : False
//A high bytes != B high bytes? Branch to else case.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotEqual, Src1 = "$t3", Src2 = "$t2", DestILPosition = currOpPosition, Extension = "Else"
});
//Otherwise, A high bytes = B high bytes
//A low bytes != B low bytes? Branch to else case.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotEqual, Src1 = "$t0", Src2 = "$t1", DestILPosition = currOpPosition, Extension = "Else"
});
//Otherwise A = B.
//Insert True case label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "True"
});
//True case - Push true (true=1)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Dest = "$t4", Src = "1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t4"
});
//And then jump to the end of this IL op.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
//Insert Else case label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Else"
});
//Else case - Push false (false=0)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
//Push the result onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
// Yes, this is supposed to be 4 - the value that just got pushed was a
// true / false integer
sizeOnStackInBytes = 4,
isGCManaged = false
});
}
else
{
throw new NotSupportedException("Unsupported number of bytes for compare equal to!");
}
//Always append the end label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if field to load is a floating value or the field to load
/// is not of size 4 or 8 bytes.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
conversionState.CurrentStackFrame.Stack.Pop();
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
// 1. Check array reference is not null
// 1.1. Move array ref into $t0
// 1.2. Compare $t0 (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 2. Load array length
// 1.1. Move array ref into eax
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 1.2. Compare eax (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", Src2 = "0", BranchType = ASMOps.BranchOp.BranchNotZero, DestILPosition = currOpPosition, Extension = "ContinueExecution1", UnsignedTest = false
});
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ContinueExecution1"
});
//2. Load array length
// - Pop array ref
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
// - Load length from array ref
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = lengthOffset.ToString() + "($t2)", Dest = "$t0" });
GlobalMethods.LoadData(conversionState, theOp, "$t2", "$t0", lengthOffset, 4);
// - Push array length
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false,
isValue = true
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
int currOpPosition = conversionState.PositionOf(theOp);
// Test if the object provided inherits from the specified class
// 1. Pop object ref
// 1.1. Test if object ref is null:
// 1.1.1 True: Push null and continue
// 1.1.2 False: Go to 2
// 2. Load object type
// 3. Test if object type == provided type:
// 3.1 True: Push object ref and continue
// 3.2 False:
// 3.2.1. Move to base type
// 3.2.2. Test if base type null:
// 3.2.2.1 True: Push null and continue
// 3.2.2.2 False: Jump back to (3)
// 1. Pop object ref
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
// 1.1. Test if object ref is null:
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", Src2 = "0", BranchType = ASMOps.BranchOp.BranchNotEqual, DestILPosition = currOpPosition, Extension = "False1", UnsignedTest = true
});
// 1.1.1 True: Push null and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
// 1.1.2 False: Go to 2
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "False1"
});
// 2. Load object type
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "0($t0)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t1", 0, 4);
// 3. Test if object type == provided type:
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
Type theType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
Types.TypeInfo theTypeInfo = conversionState.TheILLibrary.GetTypeInfo(theType);
string TestTypeId = theTypeInfo.ID;
conversionState.AddExternalLabel(TestTypeId);
conversionState.Append(new ASMOps.La()
{
Label = TestTypeId, Dest = "$t2"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Label3"
});
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t1", Src2 = "$t2", BranchType = ASMOps.BranchOp.BranchNotEqual, DestILPosition = currOpPosition, Extension = "False2", UnsignedTest = true
});
// 3.1 True: Push object ref and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
// 3.2 False:
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "False2"
});
// 3.2.1. Move to base type
int baseTypeOffset = conversionState.GetTypeFieldOffset("TheBaseType");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = baseTypeOffset + "($t1)", Dest = "$t1" });
GlobalMethods.LoadData(conversionState, theOp, "$t1", "$t1", baseTypeOffset, 4);
// 3.2.2. Test if base type null:
// 3.2.2.2 False: Jump back to (3)
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t1", Src2 = "0", BranchType = ASMOps.BranchOp.BranchNotEqual, DestILPosition = currOpPosition, Extension = "Label3", UnsignedTest = true
});
// 3.2.2.1 True: Push null and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if compare operands are floating point numbers or if either value is < 4 bytes in length or
/// operands are not of the same size.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Pop in reverse order to push
StackItem itemB = conversionState.CurrentStackFrame.Stack.Pop();
StackItem itemA = conversionState.CurrentStackFrame.Stack.Pop();
bool unsignedComparison = (OpCodes)theOp.opCode.Value == OpCodes.Cgt_Un;
int currOpPosition = conversionState.PositionOf(theOp);
if (itemB.isFloat || itemA.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Add floats is unsupported!");
}
else if (itemA.sizeOnStackInBytes == 4 && itemB.sizeOnStackInBytes == 4)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//Compare A to B
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "EBX"
});
//If A <= B, jump to Else (not-true case)
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpLessThanEqual, DestILPosition = currOpPosition, Extension = "Else", UnsignedTest = unsignedComparison
});
//Otherwise, A > B, so push true (true=1)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "1"
});
//And then jump to the end of this IL op.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End"
});
//Insert the Else label.
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Else"
});
//Else case - Push false (false=0)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
//Push the result onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false
});
}
else if (itemA.sizeOnStackInBytes == 8 && itemB.sizeOnStackInBytes == 8)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EDX"
});
//If A high bytes > B high bytes : True
//If A high bytes = B high bytes : Check, if A low bytes > B low bytes : True
//Else : False
//Compare high bytes
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EDX", Arg2 = "ECX"
});
//A high bytes > B high bytes? Jump to true case.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpGreaterThan, DestILPosition = currOpPosition, Extension = "True", UnsignedTest = unsignedComparison
});
//A high bytes < B high bytes? Jump to else case.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpLessThan, DestILPosition = currOpPosition, Extension = "Else", UnsignedTest = unsignedComparison
});
//Otherwise, A high bytes = B high bytes
//So compare low bytes
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "EBX"
});
//A low bytes <= B low bytes? Jump to else case.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpLessThanEqual, DestILPosition = currOpPosition, Extension = "Else", UnsignedTest = unsignedComparison
});
//Otherwise A > B.
//Insert True case label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "True"
});
//True case - Push true (true=1)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "1"
});
//And then jump to the end of this IL op.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End"
});
//Insert Else case label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Else"
});
//Else case - Push false (false=0)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
//Push the result onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
// Yes, this is supposed to be 4 - the value that just got pushed was a
// true / false integer
sizeOnStackInBytes = 4,
isGCManaged = false
});
}
else
{
throw new NotSupportedException("Unsupported number of bytes for compare greater than!");
}
//Always append the end label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if either or both values to shift left are floating point values or
/// if the values are 8 bytes in size.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// Thrown if either or both values to multiply are not 4 or 8 bytes
/// in size or if the values are of different size.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Pop in reverse order to push
StackItem itemB = conversionState.CurrentStackFrame.Stack.Pop();
StackItem itemA = conversionState.CurrentStackFrame.Stack.Pop();
int currOpPosition = conversionState.PositionOf(theOp);
if (itemB.sizeOnStackInBytes < 4 ||
itemA.sizeOnStackInBytes < 4)
{
throw new InvalidOperationException("Invalid stack operand sizes!");
}
else if (itemB.isFloat || itemA.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Shift right on floats is unsupported!");
}
else
{
bool SignedShift = (OpCodes)theOp.opCode.Value != OpCodes.Shr_Un;
if (itemA.sizeOnStackInBytes == 4 &&
itemB.sizeOnStackInBytes == 4)
{
if (!SignedShift)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Srlv()
{
Dest = "$t0", Src = "$t0", BitsReg = "$t2"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
else
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Srav()
{
Dest = "$t0", Src = "$t0", BitsReg = "$t2"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
}
else if ((itemA.sizeOnStackInBytes == 4 &&
itemB.sizeOnStackInBytes == 8))
{
throw new InvalidOperationException("Invalid stack operand sizes! 4,8 not supported.");
}
else if ((itemA.sizeOnStackInBytes == 8 &&
itemB.sizeOnStackInBytes == 4))
{
if (!SignedShift)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//Check shift size
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t2", Src2 = "32", BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shr (< 32)
//Works for shifting 64 bit values
//Right shift (logical) low bits ($t0) by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Left shift high bits ($t3) by (32-$t2) into temp ($t1)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t1", Src2 = "$t2", Dest = "$t1"
});
conversionState.Append(new ASMOps.Sllv()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t1"
}); //$t1 = temp
//Copy temp to low bits
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t1", Src2 = "$t0", Dest = "$t0"
});
//Right shift (logical) high bits by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t3", BitsReg = "$t2", Dest = "$t3"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
//Shr (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
//Move high bits ($t3) to low bits ($t0)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
//Zero out high bits
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t3", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//Right shift (logical) low bits by (t2-32)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t2", Src2 = "$t1", Dest = "$t2"
});
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
else
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//Check shift size
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t2", Src2 = "32", BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shr (< 32)
//Works for shifting 64 bit values
//Right shift (logical) low bits ($t0) by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Left shift high bits ($t3) by (32-$t2) into temp ($t1)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t1", Src2 = "$t2", Dest = "$t1"
});
conversionState.Append(new ASMOps.Sllv()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t1"
}); //$t1 = temp
//Copy temp to low bits
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t1", Src2 = "$t0", Dest = "$t0"
});
//Right shift (arithmetic) high bits by $t2
conversionState.Append(new ASMOps.Srav()
{
Src = "$t3", BitsReg = "$t2", Dest = "$t3"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
//Shr (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
//Move high bits ($t3) to low bits ($t0)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
//Conserve sign
//Right shift (arithmetic) high bits by 31 to conserve sign
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "31", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Srav()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t3"
});
//Right shift (arithmetic) low bits by (t2-32)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t2", Src2 = "$t1", Dest = "$t2"
});
conversionState.Append(new ASMOps.Srav()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
}
else if (itemA.sizeOnStackInBytes == 8 &&
itemB.sizeOnStackInBytes == 8)
{
//Note: Shifting by more than 64 bits is pointless since the value will be annihilated entirely.
// "64" fits well within the low 32-bits
// So for this op, we do the same as the 8-4 byte version but discard the top four bytes
// of the second operand
// Except we must check the high bytes for non-zero value. If they are non-zero, we simply
// push a result of zero.
if (!SignedShift)
{
//Pop item B (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//Check high 4 bytes of second param
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t1", BranchType = ASMOps.BranchOp.BranchZero, DestILPosition = currOpPosition, Extension = "Zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End2"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Zero"
});
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t2", Src2 = "32", BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shrd (< 32)
//Works for shifting 64 bit values
//Right shift (logical) low bits ($t0) by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Left shift high bits ($t3) by (32-$t2) into temp
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t1", Src2 = "$t2", Dest = "$t1"
});
conversionState.Append(new ASMOps.Sllv()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t1"
}); //$t1 = temp
//Copy temp to low bits
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t1", Src2 = "$t0", Dest = "$t0"
});
//Right shift (logical) high bits by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t3", BitsReg = "$t2", Dest = "$t3"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End1"
});
//Shr (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
//Move high bits ($t3) to low bits ($t0)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
//Zero out high bits
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t3", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
//Right shift (logical) low bits by (t2-32)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t2", Src2 = "$t1", Dest = "$t2"
});
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End1"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End2"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
else
{
//Pop item B (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//Check high 4 bytes of second param
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t1", BranchType = ASMOps.BranchOp.BranchZero, DestILPosition = currOpPosition, Extension = "Zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End2"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "zero"
});
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t2", Src2 = "32", BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shrd (< 32)
//Works for shifting 64 bit values
//Right shift (logical) low bits ($t0) by $t2
conversionState.Append(new ASMOps.Srlv()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Left shift high bits ($t3) by (32-$t2) into temp
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t1", Src2 = "$t2", Dest = "$t1"
});
conversionState.Append(new ASMOps.Sllv()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t1"
}); //$t1 = temp
//Copy temp to low bits
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t1", Src2 = "$t0", Dest = "$t0"
});
//Right shift (arithmetic) high bits by $t2
conversionState.Append(new ASMOps.Srav()
{
Src = "$t3", BitsReg = "$t2", Dest = "$t3"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End1"
});
//Shr (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
//Move high bits ($t3) to low bits ($t0)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
//Conserve sign
//Right shift (arithmetic) high bits by 31 to conserve sign
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "31", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Srav()
{
Src = "$t3", BitsReg = "$t1", Dest = "$t3"
});
//Right shift (arithmetic) low bits by (t2-32)
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "32", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t2", Src2 = "$t1", Dest = "$t2"
});
conversionState.Append(new ASMOps.Srav()
{
Src = "$t0", BitsReg = "$t2", Dest = "$t0"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End1"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End2"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false,
isValue = itemA.isValue && itemB.isValue
});
}
}
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
Type elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetNewArrMethodInfo().ID);
//New array must:
// - Allocate memory on the heap for the object
// - If no memory is left, throw a panic attack because we're out of memory...
// - Call the specified constructor
int currOpPosition = conversionState.PositionOf(theOp);
//Attempt to allocate memory on the heap for the new array
//This involves:
// - (Number of elements is already on the stack)
// - Pushing the element type reference onto the stack
// - Calling GC NewArr method
// - Check the pointer == 0, if so, out of memory
//Push type reference
string typeIdStr = conversionState.TheILLibrary.GetTypeInfo(elementType).ID;
conversionState.AddExternalLabel(typeIdStr);
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = typeIdStr
});
//Push a dword for return value (i.e. new array pointer)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
//Get the GC.NewArr method ID (i.e. ASM label)
string methodLabel = conversionState.GetNewArrMethodInfo().ID;
//Call GC.NewArr
conversionState.Append(new ASMOps.Call()
{
Target = methodLabel
});
//Pop the return value (i.e. new array pointer)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//Remove args from stack
conversionState.Append(new ASMOps.Add()
{
Src = "8", Dest = "ESP"
});
//Check if pointer == 0?
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
//If it isn't 0, not out of memory so continue execution
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotZero, DestILPosition = currOpPosition, Extension = "NotNullMem"
});
//If we are out of memory, we have a massive problem
//Because it means we don't have space to create a new exception object
//So ultimately we just have to throw a kernel panic
//Throw a panic attack... ( :/ ) by calling kernel Halt(uint lastAddress)
//result.AppendLine("call GetEIP");
//result.AppendLine("push dword esp");
//result.AppendLine("push dword ebp");
//result.AppendLine("pushad");
//result.AppendLine("mov dword eax, 0xDEADBEEF");
//result.AppendLine("mov dword ebx, 0x2");
//result.AppendLine("mov dword ecx, 1");
//result.AppendLine("mov dword [staticfield_System_Boolean_Kernel_FOS_System_GC_Enabled], 1");
//result.AppendLine("mov dword [staticfield_System_Boolean_Kernel_FOS_System_Heap_PreventAllocation], 0");
//result.AppendLine("jmp method_System_Void_RETEND_Kernel_PreReqs_DECLEND_PageFaultDetection_NAMEEND___Fail");
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
//Insert the not null label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotNullMem"
});
//Push new array pointer
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isNewGCObject = true,
isGCManaged = true,
isValue = false
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if constant is a floating point number.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
Type elementType = null;
//bool pushValue = true;
int sizeToPop = 4;
bool isFloat = false;
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID);
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Stelem:
{
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
}
break;
case OpCodes.Stelem_R4:
case OpCodes.Stelem_R8:
//TODO - Add more StElem op variants support
throw new NotSupportedException("Stelem op variant not supported yet!");
case OpCodes.Stelem_I1:
sizeToPop = 1;
elementType = typeof(sbyte);
break;
case OpCodes.Stelem_I2:
sizeToPop = 2;
elementType = typeof(Int16);
break;
case OpCodes.Stelem_Ref:
elementType = null;
break;
case OpCodes.Stelem_I4:
elementType = typeof(Int32);
break;
case OpCodes.Stelem_I8:
sizeToPop = 8;
elementType = typeof(Int64);
break;
}
if (isFloat)
{
//TODO - Support floats
throw new NotSupportedException("StElem for floats not supported yet!");
}
//Get element from array and push the value onto the stack
// (or for LdElemA push the address of the value)
//This involves:
// 1. Check array reference is not null
// - If it is, throw NullReferenceException
// 2. Check array element type is correct
// - If not, throw ArrayTypeMismatchException
// 3. Check index to get is > -1 and < array length
// - If not, throw IndexOutOfRangeException
// 4. Calculate address of element
// 5. Pop the value from the stack into the element
//Stack setup upon entering this op: (top-most downwards)
// 0. Value to store (word or 2 words)
// 1. Index of element to get as Int32 (word)
// 2. Array object reference as address (word)
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
// 1. Check array reference is not null
// 1.1. Move array ref into $t0
// 1.2. Compare $t0 (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 1.1. Move array ref into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = (sizeToPop == 8 ? 12 : 8).ToString() + "($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 1.2. Compare $t0 (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotZero, Src1 = "$t0", DestILPosition = currOpPosition, Extension = "Continue1"
});
// 1.4. Otherwise, call Exceptions.Throw1NullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue1"
});
// 2. Check array element type is correct
// 2.1. Move element type ref into $t0
// 2.2. Move element type ref from array object into $t1
// 2.3. Compare $t0 to $t1
// 2.4. If the same, jump to continue execution further down
// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//string ContinueExecutionLabel2 = ContinueExecutionLabelBase + "2";
//// 2.1. Move element type ref into $t0
//if (elementType != null)
//{
// result.AppendLine(string.Format("mov $t0, {0}", conversionState.GetTypeIdString(conversionState.GetTypeID(elementType))));
//}
//else
//{
// //Should be the same for all classes since they are (indirectly) derived from ObjectWithType
// int typeOffset = conversionState.GetFieldOffset(arrayDBType, "_Type");
// // - Move value (which is a ref) into $t0
// GlobalMethods.CheckAddrFromRegister(conversionState, "$sp", 0);
// result.AppendLine("mov $t0, 0($sp)");
// // - Move value type ref (from value (ref)) into $t0
// GlobalMethods.CheckAddrFromRegister(conversionState, "$t0", typeOffset);
// result.AppendLine(string.Format("mov $t0, {0}($t0)", typeOffset));
//}
//// 2.2. Move element type ref from array object into $t1
//// - Move array ref into $t1
//GlobalMethods.CheckAddrFromRegister(conversionState, "$sp", sizeToPop == 8 ? 12 : 8);
//result.AppendLine(string.Format("mov $t1, {0}($sp)", sizeToPop == 8 ? 12 : 8));
//// - Move elemType ref (offset($t1)) into $t1
int elemTypeOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "elemType").OffsetInBytes;
//GlobalMethods.CheckAddrFromRegister(conversionState, "$t1", elemTypeOffset);
//result.AppendLine(string.Format("mov $t1, {0}($t1)", elemTypeOffset));
//// 2.3. Compare $t0 to $t1
//result.AppendLine("cmp $t0, $t1");
//// 2.4. If the same, jump to continue execution further down
//result.AppendLine("je " + ContinueExecutionLabel2);
//// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//result.AppendLine(string.Format("call {0}", conversionState.GetMethodID(conversionState.ThrowArrayTypeMismatchExceptionMethod)));
//result.AppendLine(ContinueExecutionLabel2 + ":");
// 3. Check index to get is > -1 and < array length
// 3.1. Move index into $t0
// 3.2. Move array length into $t1
// 3.2. Compare $t0 to 0
// 3.3. Jump if greater than to next test condition (3.5)
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.5. Compare $t0 to $t1
// 3.6. Jump if less than to continue execution further down
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.1. Move index into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = (sizeToPop == 8 ? 8 : 4).ToString() + "($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 3.2. Move array length into $t2
// - Calculate the offset of the field from the start of the array object
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
// - Move array ref into $t1
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = (sizeToPop == 8 ? 12 : 8).ToString() + "($sp)", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// - Move length value (offset($t1)) into $t1
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = lengthOffset.ToString() + "($t1)", Dest = "$t1" });
GlobalMethods.LoadData(conversionState, theOp, "$t1", "$t1", lengthOffset, 4);
// 3.2. Compare $t0 to 0
// 3.3. Jump if greater than to next test condition (3.5)
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchGreaterThanEqual, Src1 = "$t0", Src2 = "$zero", DestILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.5. Compare $t0 to $t1
// 3.6. Jump if less than to continue execution further down
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchLessThan, Src1 = "$t0", Src2 = "$t1", DestILPosition = currOpPosition, Extension = "Continue3_2"
});
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_2"
});
// 4. Calculate address of element
// 4.0. Pop value into $t2:$t1
// 4.1. Pop index into $t3
// 4.2. Pop array ref into $t0
// 4.3. Move element type ref (from array ref) into $t0
// 4.4. Push $t0
// 4.5. Move IsValueType (from element ref type) into $t0
// 4.6. If IsValueType, continue to 4.6., else goto 4.9.
// 4.7. Pop $t0
// 4.8. Move Size (from element type ref) into $t0
// 4.9. Skip over 4.9. and 4.10.
// 4.10. Pop $t0
// 4.11. Move StackSize (from element type ref) into $t0
// 4.12. Mulitply $t0 by $t3 (index by element size)
// 4.13. Move array ref into $t3
// 4.14. Add enough to go past Kernel.FOS_System.Array fields
// 4.15. Add $t0 and $t1 (array ref + fields + (index * element size))
// 4.0. Pop value into $t2:$t1
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t2"
});
if (sizeToPop == 8)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
}
// 4.1. Pop index into $t3
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
// 4.2. Move array ref into $t0
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
// 4.3. Move element type ref (from array ref) into $t0
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = elemTypeOffset.ToString() + "($t0)", Dest = "$t0" });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", elemTypeOffset, 4);
// 4.4. Push $t0
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
// 4.5. Move IsValueType (from element ref type) into $t0
int isValueTypeOffset = conversionState.GetTypeFieldOffset("IsValueType");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Byte, Src = isValueTypeOffset.ToString() + "($t0)", Dest = "$t0" });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", isValueTypeOffset, 1);
// 4.6. If IsValueType, continue to 4.7., else goto 4.9.
conversionState.Append(new ASMOps.And()
{
Src1 = "$t0", Src2 = "1", Dest = "$t4"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchZero, Src1 = "$t4", DestILPosition = currOpPosition, Extension = "Continue4_1"
});
// 4.7. Pop $t0
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
// 4.8. Move Size (from element type ref) into $t0
int sizeOffset = conversionState.GetTypeFieldOffset("Size");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = sizeOffset.ToString() + "($t0)", Dest = "$t0" });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", sizeOffset, 4);
// 4.9. Skip over 4.9. and 4.10.
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "Continue4_2"
});
// 4.10. Pop $t0
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_1"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
// 4.11. Move StackSize (from element type ref) into $t0
int stackSizeOffset = conversionState.GetTypeFieldOffset("StackSize");
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = stackSizeOffset.ToString() + "($t0)", Dest = "$t0" });
GlobalMethods.LoadData(conversionState, theOp, "$t0", "$t0", stackSizeOffset, 4);
// 4.12. Mulitply $t0 by $t3 (index by element size)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_2"
});
conversionState.Append(new ASMOps.Mul()
{
Src1 = "$t3", Src2 = "$t0"
});
conversionState.Append(new ASMOps.Mflo()
{
Dest = "$t0"
});
// 4.13. Pop array ref into $t3
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
// 4.14. Add enough to go past Kernel.FOS_System.Array fields
int allFieldsOffset = 0;
#region Offset calculation
{
Types.FieldInfo highestOffsetFieldInfo = arrayTypeInfo.FieldInfos.Where(x => !x.IsStatic).OrderByDescending(x => x.OffsetInBytes).First();
Types.TypeInfo fieldTypeInfo = conversionState.TheILLibrary.GetTypeInfo(highestOffsetFieldInfo.UnderlyingInfo.FieldType);
allFieldsOffset = highestOffsetFieldInfo.OffsetInBytes + (fieldTypeInfo.IsValueType ? fieldTypeInfo.SizeOnHeapInBytes : fieldTypeInfo.SizeOnStackInBytes);
}
#endregion
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t3", Src2 = allFieldsOffset.ToString(), Dest = "$t3"
});
// 4.15. Add $t0 and $t3 (array ref + fields + (index * element size))
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t3", Src2 = "$t0", Dest = "$t0"
});
// 5. Pop the element from the stack to array
// 5.1. Move value in $t1:$t2 to 0($t0)
if (sizeToPop == 8)
{
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "$t2", Dest = "0($t0)" });
GlobalMethods.StoreData(conversionState, theOp, "$t0", "$t2", 0, 4);
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "$t1", Dest = "4($t0)" });
GlobalMethods.StoreData(conversionState, theOp, "$t0", "$t1", 4, 4);
}
else if (sizeToPop == 4)
{
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "$t2", Dest = "0($t0)" });
GlobalMethods.StoreData(conversionState, theOp, "$t0", "$t2", 0, 4);
}
else if (sizeToPop == 2)
{
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Halfword, Src = "$t2", Dest = "0($t0)" });
GlobalMethods.StoreData(conversionState, theOp, "$t0", "$t2", 0, 2);
}
else if (sizeToPop == 1)
{
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Byte, Src = "$t2", Dest = "0($t0)" });
GlobalMethods.StoreData(conversionState, theOp, "$t0", "$t2", 0, 1);
}
// 5.2. Pop index, array ref and value from our stack
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
Type elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetNewArrMethodInfo().ID);
//New array must:
// - Allocate memory on the heap for the object
// - If no memory is left, throw a panic attack because we're out of memory...
// - Call the specified constructor
int currOpPosition = conversionState.PositionOf(theOp);
//Attempt to allocate memory on the heap for the new array
//This involves:
// - (Number of elements is already on the stack)
// - Pushing the element type reference onto the stack
// - Calling GC NewArr method
// - Check the pointer == 0, if so, out of memory
//Push type reference
string typeIdStr = conversionState.TheILLibrary.GetTypeInfo(elementType).ID;
conversionState.AddExternalLabel(typeIdStr);
conversionState.Append(new ASMOps.La()
{
Label = typeIdStr, Dest = "$t4"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t4"
});
//Push a dword for return value (i.e. new array pointer)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
//Get the GC.NewArr method ID (i.e. ASM label)
string methodLabel = conversionState.GetNewArrMethodInfo().ID;
//Call GC.NewArr
conversionState.Append(new ASMOps.Call()
{
Target = methodLabel
});
//Pop the return value (i.e. new array pointer)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Remove args from stack
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = "8", Dest = "$sp"
});
//Check if pointer == 0?
//If it isn't 0, not out of memory so continue execution
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t0", BranchType = ASMOps.BranchOp.BranchNotZero, DestILPosition = currOpPosition, Extension = "NotNullMem", UnsignedTest = true
});
//If we are out of memory, we have a massive problem
//Because it means we don't have space to create a new exception object
//So ultimately we just have to throw a kernel panic
//Throw a panic attack... ( :/ ) by calling kernel Halt(uint lastAddress)
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
//Insert the not null label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotNullMem"
});
//Push new array pointer
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isNewGCObject = true,
isGCManaged = true,
isValue = false
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if the value to store is floating point.
/// </exception>
/// <exception cref="System.NotImplementedException">
/// Thrown if the op is 'StIndRef'.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Pop value
//Pop address
//Mov [address], value
StackItem valueItem = conversionState.CurrentStackFrame.Stack.Pop();
StackItem addressItem = conversionState.CurrentStackFrame.Stack.Pop();
int bytesToStore = 0;
bool isFloat = false;
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Stind_I:
bytesToStore = 4;
break;
case OpCodes.Stind_I1:
bytesToStore = 1;
break;
case OpCodes.Stind_I2:
bytesToStore = 2;
break;
case OpCodes.Stind_I4:
bytesToStore = 4;
break;
case OpCodes.Stind_I8:
bytesToStore = 8;
break;
case OpCodes.Stind_R4:
bytesToStore = 4;
isFloat = true;
break;
case OpCodes.Stind_R8:
bytesToStore = 8;
isFloat = true;
break;
case OpCodes.Stind_Ref:
bytesToStore = 4;
break;
}
if (isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Floats not supported yet!");
}
int currOpPosition = conversionState.PositionOf(theOp);
if (bytesToStore == 8)
{
//Pop value low bits
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Pop value high bits
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
//Pop address
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
// Alignment tests
conversionState.Append(new ASMOps.And()
{
Src1 = "$t1", Src2 = "3", Dest = "$t5"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "1", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "2", DestILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "3", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "WordAligned"
});
//Mov [address], value
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "1($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "2($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "3($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t3", Dest = "4($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t3", Dest = "$t3", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t3", Dest = "5($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t3", Dest = "$t3", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t3", Dest = "6($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t3", Dest = "$t3", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t3", Dest = "7($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t0", Dest = "2($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t3", Dest = "4($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t3", Dest = "$t3", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t3", Dest = "6($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "4($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
}
else if (bytesToStore == 4)
{
//Pop value
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Pop address
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
// Alignment tests
conversionState.Append(new ASMOps.And()
{
Src1 = "$t1", Src2 = "3", Dest = "$t5"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "1", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "2", DestILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "3", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "WordAligned"
});
//Mov [address], value
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "1($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "2($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "3($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t0", Dest = "2($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
}
else if (bytesToStore == 2)
{
//Pop value
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Pop address
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
// Alignment tests
conversionState.Append(new ASMOps.And()
{
Src1 = "$t1", Src2 = "3", Dest = "$t5"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "1", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "2", DestILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "3", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "WordAligned"
});
//Mov [address], value
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Srl()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "1($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
}
else if (bytesToStore == 1)
{
//Pop value
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Pop address
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
//Mov [address], value
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "$t0", Dest = "0($t1)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
}
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
StackItem itemToConvert = conversionState.CurrentStackFrame.Stack.Pop();
int numBytesToConvertTo = 0;
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Conv_I:
numBytesToConvertTo = 4;
break;
case OpCodes.Conv_I1:
numBytesToConvertTo = 1;
break;
case OpCodes.Conv_I2:
numBytesToConvertTo = 2;
break;
case OpCodes.Conv_I4:
numBytesToConvertTo = 4;
break;
case OpCodes.Conv_I8:
numBytesToConvertTo = 8;
break;
}
int bytesPopped = 0;
bool pushEDX = false;
switch (numBytesToConvertTo)
{
case 1:
//Convert to Int8 (byte)
//Sign extend to dword
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Byte, Dest = "$t0", SignExtend = true
});
bytesPopped = 1;
break;
case 2:
//Convert to Int16 (word)
//Sign extend to dword
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Halfword, Dest = "$t0", SignExtend = true
});
bytesPopped = 2;
break;
case 4:
//Convert to Int32 (dword)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
bytesPopped = 4;
break;
case 8:
//Convert to Int64
if (itemToConvert.sizeOnStackInBytes == 8)
{
//Result stored in EAX:EDX
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t3"
});
bytesPopped = 8;
}
else
{
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Src = "$t0", Dest = "$t3", MoveType = ASMOps.Mov.MoveTypes.RegToReg, Size = ASMOps.OperandSize.Word
});
conversionState.Append(new ASMOps.And()
{
Src1 = "$t3", Src2 = "0x80000000", Dest = "$t3"
});
conversionState.Append(new ASMOps.Branch()
{
Src1 = "$t3", BranchType = ASMOps.BranchOp.BranchZero, DestILPosition = currOpPosition, Extension = "Positive"
});
conversionState.Append(new ASMOps.Mov()
{
Src = "0xFFFFFFFF", Dest = "$t3", Size = ASMOps.OperandSize.Word, MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Positive"
});
bytesPopped = 4;
}
pushEDX = true;
break;
}
int bytesDiff = itemToConvert.sizeOnStackInBytes - bytesPopped;
if (bytesDiff > 0)
{
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = bytesDiff.ToString(), Dest = "$sp"
});
}
if (pushEDX)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t3"
});
}
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
sizeOnStackInBytes = (pushEDX ? 8 : 4),
isFloat = false,
isGCManaged = false
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Load indirect
//Pop address
//Push [address]
StackItem addressItem = conversionState.CurrentStackFrame.Stack.Pop();
int bytesToLoad = 0;
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Ldind_U1:
case OpCodes.Ldind_I1:
bytesToLoad = 1;
break;
case OpCodes.Ldind_U2:
case OpCodes.Ldind_I2:
bytesToLoad = 2;
break;
case OpCodes.Ldind_U4:
case OpCodes.Ldind_I4:
case OpCodes.Ldind_I:
bytesToLoad = 4;
break;
case OpCodes.Ldind_I8:
bytesToLoad = 8;
break;
case OpCodes.Ldind_Ref:
bytesToLoad = Options.AddressSizeInBytes;
break;
}
int currOpPosition = conversionState.PositionOf(theOp);
//Pop address
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t1"
});
if (bytesToLoad != 1)
{
// Alignment tests
conversionState.Append(new ASMOps.And()
{
Src1 = "$t1", Src2 = "3", Dest = "$t5"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "1", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "2", DestILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchEqual, Src1 = "$t5", Src2 = "3", DestILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "WordAligned"
});
}
if ((OpCodes)theOp.opCode.Value == OpCodes.Ldind_Ref)
{
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "3($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 24
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "2($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 16
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "1($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 8
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "2($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
}
else
{
if (bytesToLoad == 1)
{
conversionState.Append(new ASMOps.Xor()
{
Src1 = "$t0", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "0($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
}
else if (bytesToLoad == 2)
{
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "1($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 8
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "0($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
}
else if (bytesToLoad == 4)
{
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "3($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 24
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "2($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 16
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "1($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 8
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "2($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
}
else if (bytesToLoad == 8)
{
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ByteAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "7($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 24
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "6($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 16
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "4($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 8
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "5($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "3($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 24
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "2($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 16
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "1($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t4", Dest = "$t4", Bits = 8
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "HalfwordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "6($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "4($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "2($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Sll()
{
Src = "$t0", Dest = "$t0", Bits = 16
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Halfword, Src = "0($t1)", Dest = "$t4", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Or()
{
Src1 = "$t4", Src2 = "$t0", Dest = "$t0"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.Branch, DestILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "WordAligned"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "4($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($t1)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
}
}
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t0"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
sizeOnStackInBytes = bytesToLoad == 8 ? 8 : 4,
isFloat = false,
isGCManaged = false,
isValue = (OpCodes)theOp.opCode.Value != OpCodes.Ldind_Ref
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if either or both values to shift left are floating point values or
/// if the values are 8 bytes in size.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// Thrown if either or both values to multiply are not 4 or 8 bytes
/// in size or if the values are of different size.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//Pop in reverse order to push
StackItem itemB = conversionState.CurrentStackFrame.Stack.Pop();
StackItem itemA = conversionState.CurrentStackFrame.Stack.Pop();
int currOpPosition = conversionState.PositionOf(theOp);
if (itemB.sizeOnStackInBytes < 4 ||
itemA.sizeOnStackInBytes < 4)
{
throw new InvalidOperationException("Invalid stack operand sizes!");
}
else if (itemB.isFloat || itemA.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Shift left on floats is unsupported!");
}
else
{
if (itemA.sizeOnStackInBytes == 4 &&
itemB.sizeOnStackInBytes == 4)
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
//Pop item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
conversionState.Append(new ASMOps.Shl()
{
Src = "CL", Dest = "EAX"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isGCManaged = false
});
}
else if ((itemA.sizeOnStackInBytes == 4 &&
itemB.sizeOnStackInBytes == 8))
{
throw new InvalidOperationException("Invalid stack operand sizes! 4,8 not supported.");
}
else if ((itemA.sizeOnStackInBytes == 8 &&
itemB.sizeOnStackInBytes == 4))
{
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EDX"
});
//Check shift size
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "ECX", Arg2 = "32"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shld (< 32)
conversionState.Append(new ASMOps.Shl()
{
Src = "EAX", Dest = "EDX", Count = "CL"
});
conversionState.Append(new ASMOps.Shl()
{
Src = "CL", Dest = "EAX"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End"
});
//Shld (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX", Dest = "EDX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "0", Dest = "EAX"
});
conversionState.Append(new ASMOps.Sub()
{
Src = "32", Dest = "ECX"
});
conversionState.Append(new ASMOps.Shl()
{
Src = "CL", Dest = "EDX"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EDX"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false
});
}
else if (itemA.sizeOnStackInBytes == 8 &&
itemB.sizeOnStackInBytes == 8)
{
//Note: Shifting by more than 64 bits is pointless since the value will be annihilated entirely.
// "64" fits well within the low 32-bits
// So for this op, we do the same as the 8-4 byte version but discard the top four bytes
// of the second operand
// Except we must check the high bytes for non-zero value. If they are non-zero, we simply
// push a result of zero.
//Pop item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
//Pop item A (8 bytes)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EDX"
});
//Check high 4 bytes of second param
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EBX", Arg2 = "0"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpZero, DestILPosition = currOpPosition, Extension = "Zero"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End2"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Zero"
});
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "ECX", Arg2 = "32"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpGreaterThanEqual, DestILPosition = currOpPosition, Extension = "ShiftMoreThan32", UnsignedTest = true
});
//Shld (< 32)
conversionState.Append(new ASMOps.Shl()
{
Src = "EAX", Dest = "EDX", Count = "CL"
});
conversionState.Append(new ASMOps.Shl()
{
Src = "CL", Dest = "EAX"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End1"
});
//Shl (>= 32)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftMoreThan32"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX", Dest = "EDX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "0", Dest = "EAX"
});
conversionState.Append(new ASMOps.Sub()
{
Src = "32", Dest = "ECX"
});
conversionState.Append(new ASMOps.Shl()
{
Src = "CL", Dest = "EDX"
});
//Push result
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End1"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EDX"
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End2"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 8,
isGCManaged = false
});
}
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if branch test operand value is a floating point value.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
//This will store the offset from the current next op's position
//to the IL op to jump to.
int ILOffset = 0;
//This will store the jump operation - by default, the basic jump op
ASMOps.JmpOp jumpOp = ASMOps.JmpOp.Jump;
bool UnsignedTest = false;
ASMOps.JmpOp inverseJumpOp = ASMOps.JmpOp.None;
bool isNegativeTest = false;
//The value for the jump op to test against - currently always "0" since on jnz and jz ops are used.
string testVal = "0";
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Br:
//Load the IL offset as signed Int 32 from the value bytes.
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
break;
case OpCodes.Br_S:
//Load the IL offset as signed Int 8 from the value bytes.
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
break;
case OpCodes.Brtrue:
//See above.
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-true means we want to do the jump if the operand is not equal to 0
//i.e. not false
//Set the jump op to jnz - Jump if Not Zero
jumpOp = ASMOps.JmpOp.JumpNotZero;
break;
case OpCodes.Brtrue_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpNotZero;
break;
case OpCodes.Brfalse:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-true means we want to do the jump if the operand is equal to 0
//i.e. is false
//Set the jump op to jz - Jump if Zero
jumpOp = ASMOps.JmpOp.JumpZero;
break;
case OpCodes.Brfalse_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpZero;
break;
case OpCodes.Beq:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-equal means we want to do the jump if the operand is equal to the other operand
//i.e. A == B
//Set the jump op to je - Jump if equal
jumpOp = ASMOps.JmpOp.JumpEqual;
inverseJumpOp = ASMOps.JmpOp.JumpNotEqual;
break;
case OpCodes.Beq_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpEqual;
inverseJumpOp = ASMOps.JmpOp.JumpNotEqual;
break;
case OpCodes.Bne_Un:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-equal means we want to do the jump if the operand is equal to the other operand
//i.e. A == B
//Set the jump op to je - Jump if not equal
jumpOp = ASMOps.JmpOp.JumpNotEqual;
isNegativeTest = true;
break;
case OpCodes.Bne_Un_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpNotEqual;
isNegativeTest = true;
break;
case OpCodes.Bge:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-greater-than-or-equal means we want to do the jump if the operand is greater than equal to
//the other operand
//i.e. A >= B
//Set the jump op to jge - Jump if greater than or equal
jumpOp = ASMOps.JmpOp.JumpGreaterThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpLessThan;
break;
case OpCodes.Bge_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpLessThan;
break;
case OpCodes.Bge_Un:
//See above : This is unsigned variant
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpLessThan;
break;
case OpCodes.Bge_Un_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpLessThan;
break;
case OpCodes.Ble:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-less-than-or-equal means we want to do the jump if the operand is less than equal to
//the other operand
//i.e. A <= B
//Set the jump op to jle - Jump if less than or equal
jumpOp = ASMOps.JmpOp.JumpLessThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpGreaterThan;
break;
case OpCodes.Ble_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpLessThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpGreaterThan;
break;
case OpCodes.Ble_Un:
//See above : This is unsigned variant
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpLessThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpGreaterThan;
break;
case OpCodes.Ble_Un_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpLessThanEqual;
inverseJumpOp = ASMOps.JmpOp.JumpGreaterThan;
break;
case OpCodes.Blt:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-less-than means we want to do the jump if the operand is less than
//the other operand
//i.e. A < B
//Set the jump op to jl - Jump if less than
jumpOp = ASMOps.JmpOp.JumpLessThan;
isNegativeTest = true;
break;
case OpCodes.Blt_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpLessThan;
isNegativeTest = true;
break;
case OpCodes.Blt_Un:
//See above : This is unsigned variant
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpLessThan;
isNegativeTest = true;
break;
case OpCodes.Blt_Un_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpLessThan;
isNegativeTest = true;
break;
case OpCodes.Bgt:
//See above
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Branch-if-greater-than means we want to do the jump if the operand is greater than
//the other operand
//i.e. A > B
//Set the jump op to jg - Jump if greater than
jumpOp = ASMOps.JmpOp.JumpGreaterThan;
isNegativeTest = true;
break;
case OpCodes.Bgt_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThan;
isNegativeTest = true;
break;
case OpCodes.Bgt_Un:
//See above : This is unsigned variant
ILOffset = Utilities.ReadInt32(theOp.ValueBytes, 0);
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThan;
isNegativeTest = true;
break;
case OpCodes.Bgt_Un_S:
//See above
ILOffset = (int)(sbyte)theOp.ValueBytes[0];
UnsignedTest = true;
//See above
jumpOp = ASMOps.JmpOp.JumpGreaterThan;
isNegativeTest = true;
break;
}
if (ILOffset == 0)
{
//Err..why bother jumping at all if the offset is 0?
conversionState.Append(new ASMOps.Comment("No jump insert - pointless 0 distance jump"));
}
else
{
//Get the IL number of the next op
int startILNum = theOp.NextOffset;
//Add the offset to get the IL op num to jump to
int ILNumToGoTo = startILNum + ILOffset;
//Find the IL op to jump to
ILOp opToGoTo = conversionState.Input.At(ILNumToGoTo);
int opToGoToPosition = conversionState.PositionOf(opToGoTo);
int currOpPosition = conversionState.PositionOf(theOp);
//If the jump op is not a straightforward jump i.e. has one or more conditions
if (jumpOp == ASMOps.JmpOp.JumpZero || jumpOp == ASMOps.JmpOp.JumpNotZero)
{
//Pop from our stack the test item to use in the condition
StackItem testItem = conversionState.CurrentStackFrame.Stack.Pop();
if (testItem.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Branch test based on float not supported!");
}
//If the test item is Int64 or UInt64
else if (testItem.sizeOnStackInBytes == 8)
{
//Compare first 32 bits (low bits)
//Then (if necessary) compare second 32 bits (high bits)
//Pop the low bits
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//Compare the low bits to the test value
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = testVal, Arg1 = "EAX"
});
//Pre-emptively pop the high bits
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//If we are testing for not equal to zero:
if (jumpOp == ASMOps.JmpOp.JumpNotZero)
{
//If the low bits are not zero, do the jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition
});
//Otherwise, test if the high bits are not 0
//We use "cmp" not "test" as "cmp" uses +/- test val, "test" uses & with test val.
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = testVal, Arg1 = "EAX"
});
//If the high bits are not zero, do the jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition
});
}
//If we are testing for equal to zero:
else if (jumpOp == ASMOps.JmpOp.JumpZero)
{
//If the low bits are not zero, jump to the end of these test as condition has not been met
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotZero, DestILPosition = currOpPosition, Extension = "End"
});
//Otherwise, test if the high bits are zero
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = testVal, Arg1 = "EAX"
});
//If they are, do the jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition
});
//Insert the end label to be jumped to if condition is not met (see above)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
else
{
//Check that no extra ops have been added in the switch block above!
throw new NotSupportedException("Unsupported 64-bit branch op!");
}
}
//If the test item is Int32 or UInt32
else if (testItem.sizeOnStackInBytes == 4)
{
//Pop the test item
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//Compare the test item to the test value
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = testVal, Arg1 = "EAX"
});
//Do the specified jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition
});
}
else
{
throw new InvalidOperationException("Invalid stack operand sizes!");
}
}
else if (jumpOp == ASMOps.JmpOp.JumpEqual || jumpOp == ASMOps.JmpOp.JumpNotEqual ||
jumpOp == ASMOps.JmpOp.JumpGreaterThanEqual ||
jumpOp == ASMOps.JmpOp.JumpLessThanEqual ||
jumpOp == ASMOps.JmpOp.JumpLessThan ||
jumpOp == ASMOps.JmpOp.JumpGreaterThan)
{
//Pop from our stack the test items to use in the condition
StackItem itemB = conversionState.CurrentStackFrame.Stack.Pop();
StackItem itemA = conversionState.CurrentStackFrame.Stack.Pop();
if (itemA.isFloat || itemB.isFloat)
{
//SUPPORT - floats
throw new NotSupportedException("Branch test based on float not supported!");
}
else if (itemA.sizeOnStackInBytes != itemB.sizeOnStackInBytes)
{
throw new InvalidOperationException("Branch test operands must be same size!");
}
else if (itemA.sizeOnStackInBytes == 8)
{
//Pop the test item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
//Pop the test item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EDX"
});
if (!isNegativeTest)
{
//Compare test item A high bits to test item B high bits
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = "ECX", Arg1 = "EDX"
});
//If they are not equal, abort the testing
conversionState.Append(new ASMOps.Jmp()
{
JumpType = inverseJumpOp, DestILPosition = currOpPosition, Extension = "End", UnsignedTest = UnsignedTest
});
//Else the igh bits are equal so test low bits
//Compare test item A low bits to test item B low bits
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = "EBX", Arg1 = "EAX"
});
//Do the specified jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition, UnsignedTest = UnsignedTest
});
//Insert the end label to be jumped to if condition is not met (see above)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
else
{
//Compare test item A high bits to test item B high bits
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = "ECX", Arg1 = "EDX"
});
//Do the specified jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition, UnsignedTest = UnsignedTest
});
//Compare test item A low bits to test item B low bits
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = "EBX", Arg1 = "EAX"
});
//Do the specified jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition, UnsignedTest = UnsignedTest
});
}
}
else if (itemA.sizeOnStackInBytes == 4)
{
//Pop the test item B
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
//Pop the test item A
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
//Compare test item A to test item B
conversionState.Append(new ASMOps.Cmp()
{
Arg2 = "EBX", Arg1 = "EAX"
});
//Do the specified jump
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition, UnsignedTest = UnsignedTest
});
}
else
{
throw new NotSupportedException("Branch test based on supplied stack item sizes not supported!");
}
}
else
{
//Do the straightforward jump...
conversionState.Append(new ASMOps.Jmp()
{
JumpType = jumpOp, DestILPosition = opToGoToPosition
});
}
}
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
MethodBase constructorMethod = theOp.MethodToCall;
Type objectType = constructorMethod.DeclaringType;
//New obj must:
// - Ignore for creation of Delegates
// - Allocate memory on the heap for the object
// - If no memory is left, throw a panic attack because we're out of memory...
// - Call the specified constructor
if (typeof(Delegate).IsAssignableFrom(objectType))
{
conversionState.Append(new ASMOps.Comment("Ignore newobj calls for Delegates"));
//Still need to:
// - Remove the "object" param but preserve the "function pointer"
StackItem funcPtrItem = conversionState.CurrentStackFrame.Stack.Pop();;
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Push(funcPtrItem);
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "0($sp)", Dest = "$t0", MoveType = ASMOps.Mov.MoveTypes.SrcMemoryToDestReg
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$t0", Dest = "4($sp)", MoveType = ASMOps.Mov.MoveTypes.SrcRegToDestMemory
});
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = "4", Dest = "$sp"
});
return;
}
Types.MethodInfo constructorMethodInfo = conversionState.TheILLibrary.GetMethodInfo(constructorMethod);
conversionState.AddExternalLabel(conversionState.GetNewObjMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(constructorMethodInfo.ID);
int currOpPosition = conversionState.PositionOf(theOp);
//Attempt to allocate memory on the heap for the new object
//This involves:
// - Pushing the type reference onto the stack
// - Calling GC NewObj method
// - Check the pointer == 0, if so, out of memory
//Push type reference
string typeIdStr = conversionState.TheILLibrary.GetTypeInfo(objectType).ID;
conversionState.AddExternalLabel(typeIdStr);
conversionState.Append(new ASMOps.La()
{
Dest = "$t4", Label = typeIdStr
});
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$t4"
});
//Push a word for return value (i.e. new object pointer)
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
//Get the GC.NewObj method ID (i.e. ASM label)
string methodLabel = conversionState.GetNewObjMethodInfo().ID;
//Call GC.NewObj
conversionState.Append(new ASMOps.Call()
{
Target = methodLabel
});
//Pop the return value (i.e. new object pointer)
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Word, Dest = "$t0"
});
//Remove arg 0 from stack
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = "4", Dest = "$sp"
});
//Check if pointer == 0?
//If it isn't 0, not out of memory so continue execution
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotZero, Src1 = "$t0", DestILPosition = currOpPosition, Extension = "NotNullMem"
});
//If we are out of memory, we have a massive problem
//Because it means we don't have space to create a new exception object
//So ultimately we just have to throw a kernel panic
//Throw a panic attack... ( :/ ) by calling kernel Halt(uint lastAddress)
//result.AppendLine("call GetEIP");
//result.AppendLine("push dword esp");
//result.AppendLine("push dword ebp");
//result.AppendLine("pushad");
//result.AppendLine("mov dword eax, 0xDEADBEEF");
//result.AppendLine("mov dword ebx, 0x1");
//result.AppendLine("mov dword ecx, 1");
//result.AppendLine("mov dword [staticfield_System_Boolean_Kernel_FOS_System_GC_Enabled], 1");
//result.AppendLine("mov dword [staticfield_System_Boolean_Kernel_FOS_System_Heap_PreventAllocation], 0");
//result.AppendLine("jmp method_System_Void_RETEND_Kernel_PreReqs_DECLEND_PageFaultDetection_NAMEEND___Fail");
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
//Insert the not null label
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "NotNullMem"
});
//Call the specified constructor
//This involves:
// - Push empty dword onto stack
// - Move all args down by one dword
// - Move object reference into dword as first arg
// - Call constructor
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Word, Src = "$zero"
});
int sizeOfArgs = 0;
ParameterInfo[] allParams = constructorMethod.GetParameters();
foreach (ParameterInfo aParam in allParams)
{
sizeOfArgs += conversionState.TheILLibrary.GetTypeInfo(aParam.ParameterType).SizeOnStackInBytes;
conversionState.CurrentStackFrame.Stack.Pop();
}
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "$sp", Dest = "$t1", MoveType = ASMOps.Mov.MoveTypes.RegToReg
});
if (sizeOfArgs > 0)
{
if (sizeOfArgs % 4 != 0)
{
throw new InvalidOperationException("sizeOfArgs not exact multiple of 4!");
}
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = (sizeOfArgs / 4).ToString(), Dest = "$t2", MoveType = ASMOps.Mov.MoveTypes.ImmediateToReg
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "ShiftArgsLoop"
});
//Decrement counter ($t2)
conversionState.Append(new ASMOps.Sub()
{
Src1 = "$t2", Src2 = "1", Dest = "$t2"
});
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "4($t1)", Dest = "$t3" });
GlobalMethods.LoadData(conversionState, theOp, "$t1", "$t3", 4, 4);
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "$t3", Dest = "0($t1)" });
GlobalMethods.StoreData(conversionState, theOp, "$t1", "$t3", 0, 4);
conversionState.Append(new ASMOps.Add()
{
Src1 = "$t1", Src2 = "4", Dest = "$t1"
});
conversionState.Append(new ASMOps.Branch()
{
BranchType = ASMOps.BranchOp.BranchNotZero, Src1 = "$t2", DestILPosition = currOpPosition, Extension = "ShiftArgsLoop"
});
}
//conversionState.Append(new ASMOps.Mov() { Size = ASMOps.OperandSize.Word, Src = "$t0", Dest = "0($t1)" });
GlobalMethods.StoreData(conversionState, theOp, "$t1", "$t0", 0, 4);
conversionState.Append(new ASMOps.Call()
{
Target = constructorMethodInfo.ID
});
//Only remove args from stack - we want the object pointer to remain on the stack
conversionState.Append(new ASMOps.Add()
{
Src1 = "$sp", Src2 = sizeOfArgs.ToString(), Dest = "$sp"
});
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
isFloat = false,
sizeOnStackInBytes = 4,
isNewGCObject = true,
isGCManaged = true
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
int currOpPosition = conversionState.PositionOf(theOp);
// Test if the object provided inherits from the specified class
// 1. Pop object ref
// 1.1. Test if object ref is null:
// 1.1.1 True: Push null and continue
// 1.1.2 False: Go to 2
// 2. Load object type
// 3. Test if object type == provided type:
// 3.1 True: Push object ref and continue
// 3.2 False:
// 3.2.1. Move to base type
// 3.2.2. Test if base type null:
// 3.2.2.1 True: Push null and continue
// 3.2.2.2 False: Jump back to (3)
// 1. Pop object ref
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
// 1.1. Test if object ref is null:
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotEqual, DestILPosition = currOpPosition, Extension = "False1"
});
// 1.1.1 True: Push null and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End"
});
// 1.1.2 False: Go to 2
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "False1"
});
// 2. Load object type
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX]", Dest = "EBX"
});
// 3. Test if object type == provided type:
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
Type theType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
Types.TypeInfo theTypeInfo = conversionState.TheILLibrary.GetTypeInfo(theType);
string TestTypeId = theTypeInfo.ID;
conversionState.AddExternalLabel(TestTypeId);
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = TestTypeId, Dest = "ECX"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Label3"
});
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EBX", Arg2 = "ECX"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotEqual, DestILPosition = currOpPosition, Extension = "False2"
});
// 3.1 True: Push object ref and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "End"
});
// 3.2 False:
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "False2"
});
// 3.2.1. Move to base type
int baseTypeOffset = conversionState.GetTypeFieldOffset("TheBaseType");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EBX+" + baseTypeOffset + "]", Dest = "EBX"
});
// 3.2.2. Test if base type null:
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EBX", Arg2 = "0"
});
// 3.2.2.2 False: Jump back to (3)
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotEqual, DestILPosition = currOpPosition, Extension = "Label3"
});
// 3.2.2.1 True: Push null and continue
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "0"
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "End"
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if constant is a floating point number.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID);
Type elementType = null;
bool pushValue = true;
int sizeToPush = 4;
bool signExtend = true;
bool isFloat = false;
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Ldelem:
{
signExtend = false;
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
}
break;
case OpCodes.Ldelema:
{
signExtend = false;
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
pushValue = false;
}
break;
case OpCodes.Ldelem_R4:
case OpCodes.Ldelem_R8:
//TODO - Add more LdElem op variants support
throw new NotSupportedException("Ldelem op variant not supported yet!");
case OpCodes.Ldelem_I1:
sizeToPush = 1;
elementType = typeof(sbyte);
break;
case OpCodes.Ldelem_I2:
sizeToPush = 2;
elementType = typeof(Int16);
break;
case OpCodes.Ldelem_U1:
sizeToPush = 1;
signExtend = false;
elementType = typeof(byte);
break;
case OpCodes.Ldelem_U2:
sizeToPush = 2;
signExtend = false;
elementType = typeof(UInt16);
break;
case OpCodes.Ldelem_Ref:
signExtend = false;
elementType = null;
break;
case OpCodes.Ldelem_U4:
signExtend = false;
elementType = typeof(UInt32);
break;
case OpCodes.Ldelem_I4:
elementType = typeof(Int32);
break;
case OpCodes.Ldelem_I8:
sizeToPush = 8;
elementType = typeof(Int64);
break;
}
if (isFloat)
{
//TODO - Support floats
throw new NotSupportedException("LdElem for floats not supported yet!");
}
//Get element from array and push the value onto the stack
// (or for LdElemA push the address of the value)
//This involves:
// 1. Check array reference is not null
// - If it is, throw NullReferenceException
// 2. Check array element type is correct
// - If not, throw ArrayTypeMismatchException
// 3. Check index to get is > -1 and < array length
// - If not, throw IndexOutOfRangeException
// 4. Calculate address of element
// 5. Push the element onto the stack
//Stack setup upon entering this op: (top-most downwards)
// 0. Index of element to get as Int32 (dword)
// 1. Array object reference as address (dword)
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
// 1. Check array reference is not null
// 1.1. Move array ref into EAX
// 1.2. Compare EAX (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 1.1. Move array ref into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+4]", Dest = "EAX"
});
// 1.2. Compare EAX (array ref) to 0
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotZero, DestILPosition = currOpPosition, Extension = "Continue1"
});
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue1"
});
// 2. Check array element type is correct
// 2.1. Move element type ref into EAX
// 2.2. Move element type ref from array object into EBX
// 2.3. Compare EAX to EBX
// 2.4. If the same, jump to continue execution further down
// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//string ContinueExecutionLabel2 = ContinueExecutionLabelBase + "2";
//// 2.1. Move element type ref into EAX
int elemTypeOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "elemType").OffsetInBytes;
//if (elementType != null)
//{
// result.AppendLine(string.Format("mov EAX, {0}", conversionState.GetTypeIdString(conversionState.GetTypeID(elementType))));
// // 2.2. Move element type ref from array object into EBX
// // - Calculate the offset of the field from the start of the array object
// // - Move array ref into EBX
//GlobalMethods.CheckAddrFromRegister(result, conversionState, "ESP", 4);
// result.AppendLine("mov EBX, [ESP+4]");
// // - Move elemType ref ([EBX+offset]) into EBX
// GlobalMethods.CheckAddrFromRegister(result, conversionState, "EBX", elemTypeOffset);
// result.AppendLine(string.Format("mov EBX, [EBX+{0}]", elemTypeOffset));
// // 2.3. Compare EAX to EBX
// result.AppendLine("cmp EAX, EBX");
// // 2.4. If the same, jump to continue execution further down
// result.AppendLine("je " + ContinueExecutionLabel2);
// // 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
// result.AppendLine(string.Format("call {0}", conversionState.GetMethodID(conversionState.ThrowArrayTypeMismatchExceptionMethod)));
// result.AppendLine(ContinueExecutionLabel2 + ":");
//}
// 3. Check index to get is > -1 and < array length
// 3.1. Move index into EAX
// 3.2. Move array length into EBX
// 3.2. Compare EAX to 0
// 3.3. Jump if greater than to next test condition (3.5)
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.5. Compare EAX to EBX
// 3.6. Jump if less than to continue execution further down
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.1. Move index into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP]", Dest = "EAX"
});
// 3.2. Move array length into ECX
// - Calculate the offset of the field from the start of the array object
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
// - Move array ref into EBX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+4]", Dest = "EBX"
});
// - Move length value ([EBX+offset]) into EBX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EBX+" + lengthOffset.ToString() + "]", Dest = "EBX"
});
// 3.2. Compare EAX to 0
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
// 3.3. Jump if greater than to next test condition (3.5)
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpGreaterThanEqual, DestILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.5. Compare EAX to EBX
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "EBX"
});
// 3.6. Jump if less than to continue execution further down
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpLessThan, DestILPosition = currOpPosition, Extension = "Continue3_2"
});
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_2"
});
// 4. Calculate address of element
// 4.1. Pop index into EBX
// 4.2. Pop array ref into EAX
// 4.3. Move element type ref (from array ref) into EAX
// 4.4. Move IsValueType (from element ref type) into ECX
// 4.5. If IsValueType, continue to 4.6., else goto 4.8.
// 4.6. Move Size (from element type ref) into EAX
// 4.7. Skip over 4.8.
// 4.8. Move StackSize (from element type ref) into EAX
// 4.9. Mulitply EAX by EBX (index by element size)
// 4.10. Move array ref into EBX
// 4.11. Add enough to go past Kernel.FOS_System.Array fields
// 4.12. Add EAX and EBX (array ref + fields + (index * element size))
// 4.1. Pop index into EBX
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
// 4.2. Move array ref into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP]", Dest = "EAX"
});
// 4.3. Move element type ref (from array ref) into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + elemTypeOffset.ToString() + "]", Dest = "EAX"
});
// 4.4. Move IsValueType (from element ref type) into ECX
int isValueTypeOffset = conversionState.GetTypeFieldOffset("IsValueType");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "0", Dest = "ECX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "[EAX+" + isValueTypeOffset.ToString() + "]", Dest = "CL"
});
// 4.5. If IsValueType, continue to 4.6., else goto 4.8.
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "ECX", Arg2 = "0"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpZero, DestILPosition = currOpPosition, Extension = "Continue4_1"
});
// 4.6. Move Size (from element type ref) into EAX
int sizeOffset = conversionState.GetTypeFieldOffset("Size");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + sizeOffset.ToString() + "]", Dest = "EAX"
});
// 4.7. Skip over 4.8.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "Continue4_2"
});
// 4.8. Move StackSize (from element type ref) into EAX
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_1"
});
int stackSizeOffset = conversionState.GetTypeFieldOffset("StackSize");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + stackSizeOffset + "]", Dest = "EAX"
});
// 4.9. Mulitply EAX by EBX (index by element size)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_2"
});
conversionState.Append(new ASMOps.Mul()
{
Arg = "EBX"
});
// 4.10. Pop array ref into EBX
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EBX"
});
// 4.11. Add enough to go past Kernel.FOS_System.Array fields
int allFieldsOffset = 0;
#region Offset calculation
{
Types.FieldInfo highestOffsetFieldInfo = arrayTypeInfo.FieldInfos.Where(x => !x.IsStatic).OrderByDescending(x => x.OffsetInBytes).First();
Types.TypeInfo fieldTypeInfo = conversionState.TheILLibrary.GetTypeInfo(highestOffsetFieldInfo.UnderlyingInfo.FieldType);
allFieldsOffset = highestOffsetFieldInfo.OffsetInBytes + (fieldTypeInfo.IsValueType ? fieldTypeInfo.SizeOnHeapInBytes : fieldTypeInfo.SizeOnStackInBytes);
}
#endregion
conversionState.Append(new ASMOps.Add()
{
Src = allFieldsOffset.ToString(), Dest = "EBX"
});
// 4.12. Add EAX and EBX (array ref + fields + (index * element size))
conversionState.Append(new ASMOps.Add()
{
Src = "EBX", Dest = "EAX"
});
// 5. Push the element onto the stack
// 5.1. Push value at [EAX] (except for LdElemA op in which case just push address)
if (pushValue)
{
switch (sizeToPush)
{
case 1:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "0", Dest = "EBX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "[EAX]", Dest = "BL"
});
if (signExtend)
{
throw new NotSupportedException("Sign extend byte to 4 bytes in LdElem not supported!");
}
break;
case 2:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "0", Dest = "EBX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "[EAX]", Dest = "BX"
});
if (signExtend)
{
conversionState.Append(new ASMOps.Cwde());
}
break;
case 4:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX]", Dest = "EBX"
});
break;
case 8:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX]", Dest = "EBX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+4]", Dest = "ECX"
});
break;
}
if (sizeToPush == 8)
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "ECX"
});
}
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EBX"
});
}
else
{
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
}
// 5.2. Pop index and array ref from our stack
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
// 5.3. Push element onto our stack
conversionState.CurrentStackFrame.Stack.Push(new StackItem()
{
sizeOnStackInBytes = sizeToPush > 4 ? 8 : 4,
isFloat = isFloat,
isNewGCObject = false,
isGCManaged = pushValue ? (elementType == null || conversionState.TheILLibrary.GetTypeInfo(elementType).IsGCManaged) : false
});
}
/// <summary>
/// See base class documentation.
/// </summary>
/// <param name="theOp">See base class documentation.</param>
/// <param name="conversionState">See base class documentation.</param>
/// <returns>See base class documentation.</returns>
/// <exception cref="System.NotSupportedException">
/// Thrown if constant is a floating point number.
/// </exception>
public override void Convert(ILConversionState conversionState, ILOp theOp)
{
Type elementType = null;
Types.TypeInfo elemTypeInfo = null;
//bool pushValue = true;
int sizeOnHeap = 4;
int sizeOnStack = 4;
bool isFloat = false;
int currOpPosition = conversionState.PositionOf(theOp);
conversionState.AddExternalLabel(conversionState.GetThrowNullReferenceExceptionMethodInfo().ID);
conversionState.AddExternalLabel(conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID);
switch ((OpCodes)theOp.opCode.Value)
{
case OpCodes.Stelem:
{
//Load the metadata token used to get the type info
int metadataToken = Utilities.ReadInt32(theOp.ValueBytes, 0);
//Get the type info for the element type
elementType = conversionState.Input.TheMethodInfo.UnderlyingInfo.Module.ResolveType(metadataToken);
elemTypeInfo = conversionState.TheILLibrary.GetTypeInfo(elementType);
sizeOnStack = elemTypeInfo.SizeOnStackInBytes;
sizeOnHeap = elemTypeInfo.IsValueType ? elemTypeInfo.SizeOnHeapInBytes : elemTypeInfo.SizeOnStackInBytes;
}
break;
case OpCodes.Stelem_R4:
case OpCodes.Stelem_R8:
//TODO - Add more StElem op variants support
throw new NotSupportedException("Stelem op variant not supported yet!");
case OpCodes.Stelem_I1:
sizeOnHeap = 1;
elementType = typeof(sbyte);
break;
case OpCodes.Stelem_I2:
sizeOnHeap = 2;
elementType = typeof(Int16);
break;
case OpCodes.Stelem_Ref:
elementType = null;
break;
case OpCodes.Stelem_I4:
elementType = typeof(Int32);
break;
case OpCodes.Stelem_I8:
sizeOnHeap = 8;
sizeOnStack = 8;
elementType = typeof(Int64);
break;
}
if (isFloat)
{
//TODO - Support floats
throw new NotSupportedException("StElem for floats not supported yet!");
}
//Get element from array and push the value onto the stack
// (or for LdElemA push the address of the value)
//This involves:
// 1. Check array reference is not null
// - If it is, throw NullReferenceException
// 2. Check array element type is correct
// - If not, throw ArrayTypeMismatchException
// 3. Check index to get is > -1 and < array length
// - If not, throw IndexOutOfRangeException
// 4. Calculate address of element
// 5. Pop the value from the stack into the element
//Stack setup upon entering this op: (top-most downwards)
// 0. Value to store (dword or 2 dwords)
// 1. Index of element to get as Int32 (dword)
// 2. Array object reference as address (dword)
Types.TypeInfo arrayTypeInfo = conversionState.GetArrayTypeInfo();
// 1. Check array reference is not null
// 1.1. Move array ref into EAX
// 1.2. Compare EAX (array ref) to 0
// 1.3. If not zero, jump to continue execution further down
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
// 1.1. Move array ref into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+" + (sizeOnStack + 4) + "]", Dest = "EAX"
});
// 1.2. Compare EAX (array ref) to 0
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
// 1.3. If not zero, jump to continue execution further down
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpNotZero, DestILPosition = currOpPosition, Extension = "Continue1"
});
// 1.4. Otherwise, call Exceptions.ThrowNullReferenceException
conversionState.Append(new ASMOps.Call()
{
Target = "GetEIP"
});
conversionState.AddExternalLabel("GetEIP");
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowNullReferenceExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue1"
});
// 2. Check array element type is correct
// 2.1. Move element type ref into EAX
// 2.2. Move element type ref from array object into EBX
// 2.3. Compare EAX to EBX
// 2.4. If the same, jump to continue execution further down
// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//string ContinueExecutionLabel2 = ContinueExecutionLabelBase + "2";
//// 2.1. Move element type ref into EAX
//if (elementType != null)
//{
// result.AppendLine(string.Format("mov EAX, {0}", conversionState.GetTypeIdString(conversionState.GetTypeID(elementType))));
//}
//else
//{
// //Should be the same for all classes since they are (indirectly) derived from ObjectWithType
// int typeOffset = conversionState.GetFieldOffset(arrayDBType, "_Type");
// // - Move value (which is a ref) into EAX
// GlobalMethods.CheckAddrFromRegister(conversionState, "ESP", 0);
// result.AppendLine("mov EAX, [ESP]");
// // - Move value type ref (from value (ref)) into EAX
// GlobalMethods.CheckAddrFromRegister(conversionState, "EAX", typeOffset);
// result.AppendLine(string.Format("mov EAX, [EAX+{0}]", typeOffset));
//}
//// 2.2. Move element type ref from array object into EBX
//// - Move array ref into EBX
//GlobalMethods.CheckAddrFromRegister(conversionState, "ESP", sizeToPop == 8 ? 12 : 8);
//result.AppendLine(string.Format("mov EBX, [ESP+{0}]", sizeToPop == 8 ? 12 : 8));
//// - Move elemType ref ([EBX+offset]) into EBX
int elemTypeOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "elemType").OffsetInBytes;
//GlobalMethods.CheckAddrFromRegister(conversionState, "EBX", elemTypeOffset);
//result.AppendLine(string.Format("mov EBX, [EBX+{0}]", elemTypeOffset));
//// 2.3. Compare EAX to EBX
//result.AppendLine("cmp EAX, EBX");
//// 2.4. If the same, jump to continue execution further down
//result.AppendLine("je " + ContinueExecutionLabel2);
//// 2.5. Otherwise, call Exceptions.ThrowArrayTypeMismatchException
//result.AppendLine(string.Format("call {0}", conversionState.GetMethodID(conversionState.ThrowArrayTypeMismatchExceptionMethod)));
//result.AppendLine(ContinueExecutionLabel2 + ":");
// 3. Check index to get is > -1 and < array length
// 3.1. Move index into EAX
// 3.2. Move array length into EBX
// 3.2. Compare EAX to 0
// 3.3. Jump if greater than to next test condition (3.5)
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.5. Compare EAX to EBX
// 3.6. Jump if less than to continue execution further down
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
// 3.1. Move index into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+" + sizeOnStack + "]", Dest = "EAX"
});
// 3.2. Move array length into ECX
// - Calculate the offset of the field from the start of the array object
int lengthOffset = conversionState.TheILLibrary.GetFieldInfo(arrayTypeInfo, "length").OffsetInBytes;
// - Move array ref into EBX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+" + (sizeOnStack + 4) + "]", Dest = "EBX"
});
// - Move length value ([EBX+offset]) into EBX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EBX+" + lengthOffset.ToString() + "]", Dest = "EBX"
});
// 3.2. Compare EAX to 0
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "0"
});
// 3.3. Jump if greater than to next test condition (3.5)
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpGreaterThanEqual, DestILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.4. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_1"
});
// 3.5. Compare EAX to EBX
conversionState.Append(new ASMOps.Cmp()
{
Arg1 = "EAX", Arg2 = "EBX"
});
// 3.6. Jump if less than to continue execution further down
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpLessThan, DestILPosition = currOpPosition, Extension = "Continue3_2"
});
// 3.7. Otherwise, call Exceptions.ThrowIndexOutOfRangeException
conversionState.Append(new ASMOps.Call()
{
Target = conversionState.GetThrowIndexOutOfRangeExceptionMethodInfo().ID
});
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue3_2"
});
// 4. Calculate address of element
// 4.1. Move index into EDX
// 4.2. Move array ref into EAX
// 4.3. Move element type ref (from array ref) into EAX
// 4.4. Push EAX
// 4.5. Move IsValueType (from element ref type) into EAX
// 4.6. If IsValueType, continue to 4.7., else goto 4.10.
// 4.7. Pop EAX
// 4.8. Move Size (from element type ref) into EAX
// 4.9. Skip over 4.9. and 4.10.
// 4.10. Pop EAX
// 4.11. Move StackSize (from element type ref) into EAX
// 4.12. Mulitply EAX by EDX (index by element size)
// 4.13. Move array ref into EDX
// 4.14. Add enough to go past Kernel.FOS_System.Array fields
// 4.15. Add EAX and EBX (array ref + fields + (index * element size))
// 4.1. Move index into EDX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+" + sizeOnStack + "]", Dest = "EDX"
});
// 4.2. Move array ref into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[ESP+" + (sizeOnStack + 4) + "]", Dest = "EAX"
});
// 4.3. Move element type ref (from array ref) into EAX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + elemTypeOffset.ToString() + "]", Dest = "EAX"
});
// 4.4. Push EAX
conversionState.Append(new ASMOps.Push()
{
Size = ASMOps.OperandSize.Dword, Src = "EAX"
});
// 4.5. Move IsValueType (from element ref type) into EAX
int isValueTypeOffset = conversionState.GetTypeFieldOffset("IsValueType");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "[EAX+" + isValueTypeOffset.ToString() + "]", Dest = "AL"
});
// 4.6. If IsValueType, continue to 4.7., else goto 4.9.
conversionState.Append(new ASMOps.Test()
{
Arg1 = "EAX", Arg2 = "1"
});
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.JumpZero, DestILPosition = currOpPosition, Extension = "Continue4_1"
});
// 4.7. Pop EAX
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
// 4.8. Move Size (from element type ref) into EAX
int sizeOffset = conversionState.GetTypeFieldOffset("Size");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + sizeOffset.ToString() + "]", Dest = "EAX"
});
// 4.9. Skip over 4.9. and 4.10.
conversionState.Append(new ASMOps.Jmp()
{
JumpType = ASMOps.JmpOp.Jump, DestILPosition = currOpPosition, Extension = "Continue4_2"
});
// 4.10. Pop EAX
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_1"
});
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "EAX"
});
// 4.11. Move StackSize (from element type ref) into EAX
int stackSizeOffset = conversionState.GetTypeFieldOffset("StackSize");
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "[EAX+" + stackSizeOffset.ToString() + "]", Dest = "EAX"
});
// 4.12. Mulitply EAX by EDX (index by element size)
conversionState.Append(new ASMOps.Label()
{
ILPosition = currOpPosition, Extension = "Continue4_2"
});
conversionState.Append(new ASMOps.Mul()
{
Arg = "EDX"
});
// 4.13. Move array ref into EDX
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Dest = "EDX", Src = "[ESP+" + (sizeOnStack + 4) + "]"
});
// 4.14. Add enough to go past Kernel.FOS_System.Array fields
int allFieldsOffset = 0;
#region Offset calculation
{
Types.FieldInfo highestOffsetFieldInfo = arrayTypeInfo.FieldInfos.Where(x => !x.IsStatic).OrderByDescending(x => x.OffsetInBytes).First();
Types.TypeInfo fieldTypeInfo = conversionState.TheILLibrary.GetTypeInfo(highestOffsetFieldInfo.UnderlyingInfo.FieldType);
allFieldsOffset = highestOffsetFieldInfo.OffsetInBytes + (fieldTypeInfo.IsValueType ? fieldTypeInfo.SizeOnHeapInBytes : fieldTypeInfo.SizeOnStackInBytes);
}
#endregion
conversionState.Append(new ASMOps.Add()
{
Src = allFieldsOffset.ToString(), Dest = "EDX"
});
// 4.15. Add EAX and EDX (array ref + fields + (index * element size))
conversionState.Append(new ASMOps.Add()
{
Src = "EDX", Dest = "EAX"
});
// 5. Pop the element from the stack to array
// 5.1. Pop value bytes from stack to array
// 5.2. Add 8 to ESP to remove Index and Array ref
for (int i = 0; i < sizeOnStack; i += 4)
{
conversionState.Append(new ASMOps.Pop()
{
Size = ASMOps.OperandSize.Dword, Dest = "ECX"
});
switch (sizeOnHeap)
{
case 1:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "CL", Dest = "[EAX+" + i + "]"
});
break;
case 2:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "CX", Dest = "[EAX+" + i + "]"
});
break;
case 3:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Byte, Src = "CL", Dest = "[EAX+" + i + "]"
});
conversionState.Append(new ASMOps.Shr()
{
Src = "16", Dest = "ECX"
});
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Word, Src = "CX", Dest = "[EAX+" + (i + 1) + "]"
});
break;
default:
conversionState.Append(new ASMOps.Mov()
{
Size = ASMOps.OperandSize.Dword, Src = "ECX", Dest = "[EAX+" + i + "]"
});
break;
}
sizeOnHeap -= 4;
}
// 5.2. Add 8 to ESP to remove Index and Array ref
conversionState.Append(new ASMOps.Add()
{
Src = "8", Dest = "ESP"
});
// 5.2. Pop index, array ref and value from our stack
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
conversionState.CurrentStackFrame.Stack.Pop();
}
