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Altera_Forum's avatar
Altera_Forum
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20 years ago

clock cycles on + - * /

Hei, I try to figure out how many clock cycles that is needed to do + - * / on both int and float. I have used the : nios2_51\examples\vhdl\niosII_cycloneII_2c35\full_featured nios2_51\ex...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

I change in code with the same result: 

 for(i = 0; i < 100; i ++){
   for(j = 0; j < 100; j ++){
     a = a + 1;
     b = b + a;
   }  
   context = alt_irq_disable_all();
   IOWR_PRE_AVALON_COUNTER(0x01211160, 0);
   data0 = IORD_PRE_AVALON_COUNTER(0x01211160);
     for(j = 0; j < 100; j ++){
       c = b + a;
     }
   data1 = IORD_PRE_AVALON_COUNTER(0x01211160);
   alt_irq_enable_all(context);
   data2 = (data1 - data0)/100;
   printf("%d \n", data2);
 }