private static void SplitFromNonConstantOperand(Operand operand, out Operand operandLow, out Operand operandHigh)
{
SigType HighType = (operand.Type.Type == CilElementType.I8) ? new SigType(CilElementType.I4) : new SigType(CilElementType.U4);
SigType U4 = new SigType(CilElementType.U4);
// No, could be a member or a plain memory operand
MemberOperand memberOperand = operand as MemberOperand;
if (memberOperand != null)
{
// We need to keep the member reference, otherwise the linker can't fixup
// the member address.
operandLow = new MemberOperand(memberOperand.Member, U4, memberOperand.Offset);
operandHigh = new MemberOperand(memberOperand.Member, HighType, new IntPtr(memberOperand.Offset.ToInt64() + 4));
}
else
{
// Plain memory, we can handle it here
MemoryOperand memoryOperand = (MemoryOperand)operand;
operandLow = new MemoryOperand(U4, memoryOperand.Base, memoryOperand.Offset);
operandHigh = new MemoryOperand(HighType, memoryOperand.Base, new IntPtr(memoryOperand.Offset.ToInt64() + 4));
}
}
/// <summary>
/// Visitation function for <see cref="ICILVisitor.Ldsfld"/>.
/// </summary>
/// <param name="ctx">The context.</param>
public void Ldsfld(Context ctx)
{
SigType sigType = ctx.RuntimeField.SignatureType;
Operand source = new MemberOperand(ctx.RuntimeField);
Operand destination = ctx.Result;
IInstruction loadInstruction = Instruction.MoveInstruction;
if (MustSignExtendOnLoad(sigType.Type))
{
loadInstruction = Instruction.SignExtendedMoveInstruction;
}
else if (MustZeroExtendOnLoad(sigType.Type))
{
loadInstruction = Instruction.ZeroExtendedMoveInstruction;
}
ctx.SetInstruction(loadInstruction, destination, source);
}
