Maybe some other idea I had from the beginning of fasm project (but never implemented it) would be useful for such purpose. This is the idea of specifying the separators for arguments for macro, like in the following example (each example macro finally produce the same code)

Code:

; WARNING: EXAMPLES OF UNIMPLEMENTED FEATURE:

macro mv arg1,arg2
 { mv arg1,arg2 }

mv al,1

macro mv arg1 arg2
 { mv arg1,arg2 }

mv al 1

macro mv arg1->arg2
 { mv arg2,arg1 }

mv 1 -> al

macro mv (arg1=arg2)
 { mv arg1,arg2 }

mv (al=1)    

As I said, this is the idea I had when I was designing the macroinstructions system for fasm, but it has never got implemented, maybe in future... (some version 2.0?)

macro mv arg
 {
   match arg1->arg2 ,arg
   \{
      mov arg2,arg1
   \}
   match (arg1==arg2) ,arg
   \{
      mov arg1,arg2
   \}
 }

mv 1 -> al

mv (al=1)