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chipsalliance / riscv-dv

Random instruction generator for RISC-V processor verification
Apache License 2.0
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RV32E instruction set support #801

Open mescoba1 opened 3 years ago

mescoba1 commented 3 years ago

Is RV32E a supported instruction set? I am aware that NUM_GPR can be configured within riscv_core_settings.sv:

parameter int NUM_GPR = 16;

However, upon doing so, registers 16-32 will still be reference, and GCC will complain about those illegal registers being reference when compiled with the march=rv32e.

mykola-mmm commented 3 years ago

Hi!

Could you try adding "-fpermissive" flag to the "gcc_opts"? Not sure this would help but definetly worth trying.

ankurcere commented 8 months ago

I've been experiencing the same issue described here and I'm curious to know if there have been any updates regarding its resolution. Could someone kindly provide an update on the status of this issue?

It seems like quite a few users are encountering this problem, so any information on progress or potential workarounds would be greatly appreciated.

zeeshanrafique23 commented 8 months ago

Try compiling with GCC flag -mabi=ilp32e Read further here: https://gcc.gnu.org/onlinedocs/gcc/RISC-V-Options.html

ankurcere commented 8 months ago

I tried this but it didn't work in my case. I'm currently facing an issue with limiting the number of registers used in my RISC-V assembly code (.S file) while generating the code. Despite setting NUM_GPR=16, the code still utilizes registers beyond x0 to x15. I need to restrict the code to only use registers x0 to x15 throughout its execution. Is RV32E supported in RISCV-DV. I've tried setting NUM_GPR=16, but it appears to regulate only the init general purpose registers with random values. Later on, it uses other registers also. Thank you in advance for any assistance or guidance provided.