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Index > Compiler Internals > Nesting macros containing locals in an irps causes an error

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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
The code is taken from the example with a local, but nested in an irps.
Code:
irps cond, a b
{
  macro movstr
     \{
        local move
      move:
        lodsb
        stosb
        test al,al
        jnz move
     \}
}

; Use it twice
movstr
movstr ; Error: symbol("move?QJ:") already defined.
    

Bug?(Fasmw 1.69.12)
This code above has no real reason to be nested, I was using irps to make a condition mov macro when I discovered the error, while using the irps to make a macro for all conditional endings.
Post 05 Apr 2010, 04:02
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16861
Location: In your JS exploiting you and your system
revolution
You have to escape local also.
Code:
irps cond, a b
{
  macro movstr
     \{
        \local move
      move:
        lodsb
        stosb
        test al,al
        jnz move
     \}
}    
Post 05 Apr 2010, 04:46
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
Dude, you're freakin' kidding me!!! Evil or Very Mad I spent SSOOO long pondering that one problem, I haven't finished anything today. The funny thing is, I also didn't escape the {}s the first few times, but I'd seen that done so many times, I eventually noticed it. Thanks, I'm using it for a conditional mov and call(not together), here's the code after I added \s
Code:
irps cond, a b e z na nb ne nz
{
   macro mov#cond dst*,src*,else_src
   \{
      if cond eq
         mov dst,src
      else
         \local .cond_met
         \local .cond_unmet
         j#cond .cond_met
         if ~(else_src eq )
            mov dst,else_src
         end if
         jmp .cond_unmet
         .cond_met:
         mov dst,src
         .cond_unmet:
      end if
   \}

     macro call#cond location ; Wasn't sure if I could use label
   \{
      \local true
      \local false
      j#cond true
      jmp false
      true:
      call location
      false:
   \}
}
    

The actual jumps are really bad style, but it'll simplify my code 100 fold.
Post 05 Apr 2010, 05:15
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16861
Location: In your JS exploiting you and your system
revolution
I use this little cmov macro for when I need to support older CPUs
Code:
irp cc,a,ae,b,be,c,e,g,ge,l,le,na,nae,nb,nbe,nc,ne,ng,nge,nl,nle,no,np,ns,nz,o,p,pe,po,s,z {
     local i
     macro cmov#cc [args] \{
           \common
            \local .x
              j#cc    .x
          load    i from $-2
          store   (i xor 1) at $-2
            mov     args
            .x:
 \}
}    
It shows the use of both escaped and unescaped local. Note that the other preprocessor strings need escaping also: common, forward, reverse,`, #, }.
Post 05 Apr 2010, 06:34
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