/********************************************************************************
* File:			Step4.c
* 
* Description:	This microbenchmark answers the question:
*				How many bits in global history register?
*				(if previous experiments detected both local and global components) 
*
* Date:			April 2002
* 
* Author:		M.Milenkovic - milena@computer.org
**********************************************************************************/

#define L1 5	/* pattern length */
#define L2 2	/* pattern length */

void main(void)
{ 
   int long unsigned	i;					/* loop index */
   int					a,b,c;				/* variables with conditional assignment*/
   int long unsigned	liter = 10000000;	/* number of iterations */
   
   for (i=1;i<=liter;++i)
   { 
	   if ((i%L1) == 0) a=1;
       else a=0;

       if ((i%L2) == 0) b=1;
       else b=0;
    
	   /* varying number of dummy branches -
	      spy branch is not predicted correctly if more dummy branches 
	      than global history bits - 2 */
	   
	   if (i<0) a=1; 
       if (i<0) a=1;
	   if (i<0) a=1;

	   /* spy branch */

       if ( (a*b) == 1) c=1;
   }
}