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Index > Macroinstructions > .if .and .endif

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eet_1024



Joined: 22 Jul 2003
Posts: 59
eet_1024
I've butchered IF.INC to provide a .and macro. This macro is chainable.
Code:
macro .and v1,c,v2
{
  if v2 eq & c eq
   cmp v1,0
   je __ELSE
  else if v1 eq & v2 eq
   jn#c __ELSE
  else
   cmp v1,v2
   jn#c __ELSE
  end if
}
    


Useage:
Code:
.if   eax
; You can place code here that will execute if eax != 0
.and ebx
; Code here only executes if (eax != 0) and (ebx !=0)
.and ecx, e, 5
; Code here only executes if (eax != 0) and (ebx !=0) and (ecx == 5)
.elseif  ; optional
.else  ; optional
.endif
    


I couldn't figure out how to do .or. But I believe it needs to invert condition of the jumps in the previous .if/.and/.or and have that jump target past the cmp of this .or declaration.

That is so shortcircuiting and chaining work.

Privalov:
Code:
  local ..else          ; What is this for
  __ELSE:
  restore __ELSE
  __ELSE equ ..else     ; And this
    

Code:
macro .endif
{
  if __IF eq   ; Is this required?
   __ELSE:
  end if
    
Post 25 Oct 2003, 00:07
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