Difference between revisions of "Code Generation/Exercise 5"

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< Code Generation
(Postfix Code)
Line 3: Line 3:
 
Consider the following C function:
 
Consider the following C function:
  
<c>
+
<source lang="c">
 
int gcd(int a, int b) {
 
int gcd(int a, int b) {
 
   static int temp = 0;
 
   static int temp = 0;
Line 15: Line 15:
 
   return b;
 
   return b;
 
}
 
}
</c>
+
</source>
  
 
== Postfix Code ==
 
== Postfix Code ==
Line 21: Line 21:
 
The Postfix code for the above function is as follows:  
 
The Postfix code for the above function is as follows:  
 
{{CollapsedCode|Postfix code|
 
{{CollapsedCode|Postfix code|
<asm>
+
<source lang="asm">
  
</asm>
+
</source>
 
}}
 
}}
  

Revision as of 13:38, 12 February 2019

The Original Code

Consider the following C function:

int gcd(int a, int b) {
  static int temp = 0;
  if (temp) temp = swap(&a, &b);
  while (1) {
    a %= b;
    if (a == 0) break;
    b %= a;
    if (b == 0) return a;
  }
  return b;
}

Postfix Code

The Postfix code for the above function is as follows:

Postfix code

Compiling and Running

To compile the Postfix code directly, pf2asm can be used:

pf2asm gcd.pf
yasm -felf gcd.asm