or1ksim 's question

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