Macro instruction define

You'd need to define IsAcc as a macro (as macros already are like C's defines with way more facilities), but FASM's macros can't return a value like MASM's can. They're also no simple textual substitution that can occur anywhere in the source like in C, they have to be invoked properly, so sth like "if IsAcc" is not possible.

What I did with TASM's macros back then was passing a local symbolic constant (equ) as a 'pointer' to the sub-macro. TASM handled those differently than FASM. With FASM, however, there is the preprocessing stage and the assembly stage. "if xx in <xx, xy>" is assembly stage, so equ (which is preprocessor stage) wouldn't work with it. But you can use constants ('=' instead of 'equ') which are assembly stage, like:

Code:

macro IsAcc reg,ret
 {
   if reg in <al,ax,eax>
    ret = 1
   else
    ret = 0
   end if
 }

macro test arg
 {
   local ret
   IsAcc arg,ret
   if ret
    display 'alright'
   else
    display 'nope'
   end if
 }