OpCodes Example

Here's a sample table that lists the OpCodes and what value is expected in them.

For reference, here's a method that's displaying our OpCodes

And here's the C# Code to go alone with it:

OpCode	Operand Type	Description
ldarg.0	Blank	It's the first argument. In nearly all cases, it translates to "this"
ldc.i4.s	0x20	This "pushes" a 32-bit int into position. In our example, it's showing 32 rather than 0x20. However, it's displaying the decimal value in the code view (32), whereas the IL is hex: 0x20
call	Method call	This 'calls' another method', passing in the operand that was pushed above it. In this case, it's calling Bag::RU( 0x20 ), or Bag::RU( ldc.i4.s)
ldarg.0	Blank	Same as above, it calls "This"
ldarg.1	blank	This the "second" parameter passed to the method. However, it's second to "this", which is passed by default. ldarg.1, in this example, refers to "_slots"
stfld	ItemStack[] Bag::UU	Updates the value in the Operand with the previous instruction. In this case, this.UU is being updated by the _slots value.
ldarg.0	Blank	Again "this"
call	Method Call	Calling another method, in this case: instance void Bag::EU()
ret	Blank	returns. This is a "void" method, so there's nothing to return.

Created with the Personal Edition of HelpNDoc: Easily create HTML Help documents