OPENCORES.ORG

by the way, where is the executed.log? i didn't find the file at cur dir or 
in the or1ksim install dir.

Dimitri?s Orfanos wrote:
> 
> There are many answers for these questions.
> 1)If you load the linux kernel on or1ksim and on the linux kernel you 
> run the program then of course you have more
> instructions because the simulator runs and the linux kernel.
> 2)The openrisc compiler produces code with many NOPs in the brand delay 
> slots. A better compiler (I haven't try to use the optimization switches 
> to say the truth , I mean to use the switch -o1 ,-o2 ,etc) could put in 
> the delay slots more useful code not NOPs.
> 3)Does the simulator stops automatically the simulation or you have to 
> press Ctrl-C? The "exit" function that the compiler uses by default puts 
> the processor (here the simulator) to infinite loop(by executing NOPs) 
> after the normal execution of the program. So if you want to stop the 
> program you press Ctrl-C ,but you are not faster than the computer so 
> many NOPs  came again in your code.
> You can check the code that was executed by seeing the file 
> "executed.log" that is produced from the simulator if you set the 
> exec_log (or exe_log , I don't remember actually) from the sim.cfg to 1.
> That's all I have to say. Hope this helps.
> 
> yueng wrote:
>> I change the sim.cfg , mem read and write both delay 1.
>> i run jpeg decode in the or1ksim
>> the result is 
>> 310,200,242 cycles, 171,816,396 instructions
>> compare with arm7 it use only 56,000,000 cycle, and 40,000,000
>> instructions
>>
>> i remember that i read or1ksim is about 90% cycle accurate somewhere,
>> same jpeg decode C code ,why or1ksim use so many instructions? and so
>> many
>> cycles.
>>
>>
>> thank you
>>   
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/openrisc
> 
> 

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