Exit cycle accurate simulation

[ashuthosh-mr]

Hi,

Is there a way to exit the verilator simulation from the C code whose hex is getting executed using RUN_HEX. For some reason, certain C codes are exiting but others are not. I do not know the exact reason why it executes all instructions and gets stuck at the end of main. By default (hello_world), it falls in infinite loop. But on changing crt.S to include

li x2, 0xF00FFF20
sw x0, 0(x2)

few codes come out of simulation, printing cycles. But as I mentioned this fix didn't work for certain C codes. Is there a way to exit simulation through C code?

Thank you

[Dolu1990]

Hi,

For some reason, if you the debug plugin is enabled, those exit condition are disabled :

VexRiscv/src/test/cpp/regression/main.cpp

Line 1970 in 6aeb6d4

#ifndef DEBUG_PLUGIN_EXTERNAL

Try removing the #ifndef