Qian Gu

Thanks for your kindness, I'd like to make a test after the PR.

Great job, the problem is solved.

So is there a way to read `mcycle` in spike? I have tried following code to switch into machine mode, but got an error saying: > bad syscall #0! ```c...

Actually I have a RV32 core which only implement M mode, following code has been test passed on a FPGA board: ```c int rdcycle() { int tmp = 0; asm...