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Index > Macroinstructions > hiword macro, problem

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snifit



Joined: 10 Dec 2004
Posts: 12
Location: Sweden
snifit
What I want is:
First compare the HIWORD in a 32 bit value, if it's a match then jump somewhere and there test the LOWORD.

This is what my macros look like:

HIWORD
Code:
macro casehiw var,[cons,label] {
  common
  push var
  xor var,0FFFFh
  shr var,16

  forward
  cmp var,cons
  je label

  common
  pop var
}    


LOWORD
Code:
macro caselow var,[cons,label] {
  common
  push var
  and var,0FFFFh

  forward
  cmp var,cons
  je label

  common
  pop var
}    


I need the pushed value poped before jumping to the label and in these macros I don't think that's the case.
So somehow i need to pop the value if equal (so I can check the loword later on), and that's what I don't know how to do.

Any help is appreciated.
Post 11 Jan 2005, 22:36
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
maybe:
Code:
macro casehiw var,[cons,label] { 
  common 
  local ..behind,..taken
  push var 
  xor var,0FFFFh 
  shr var,16 

  forward 
  cmp var,cons 
  je ..taken

  common 
  jmp ..behind
  ..taken:
  pop var
  jmp label
..behind
  pop var 
}    
Post 12 Jan 2005, 00:08
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JohnFound



Joined: 16 Jun 2003
Posts: 3500
Location: Bulgaria
JohnFound
In all cases
Code:
xor var,0FFFFh    
is meaningless. Smile
Post 12 Jan 2005, 06:30
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snifit



Joined: 10 Dec 2004
Posts: 12
Location: Sweden
snifit
True, since shr shifts in zeros, well thanks guys
Post 12 Jan 2005, 08:20
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