Question about riscv-qemu trace

[Zahra Azad]

Hi all,

I want to use riscv-qemu to get a trace of the guest executed instructions of a vectorized program. I'm using the following command:

qemu-riscv64 -cpu rv64,x-v=true,x-k=true,vlen=256,elen=64,vext_spec=v1.0 -D logfile.log -d in_asm,cpu,fpu program

Although the program is executed correctly without throwing any error, in the trace log all the vector instructions are shown as illegal instructions. Any ideas what is going wrong?

I built riscv toolchain and llvm from the main branch (following sifive instructions), and riscv qemu is built from https://github.com/sifive/qemu/tree/v5.2.0-rvv-rvb-zfh.

Thank you!