Good afternoon folks,
As part of a research project I have been trying to setup a Gem5
simulation with a RISC-V ISA while adding in a custom operation. I found
a handful of old articles
<https://nitish2112.github.io/post/adding-instruction-riscv/> [2
<https://stackoverflow.com/questions/32953911/how-to-add-a-new-custom-instruction-in-the-riscv-instruction-set>]
and videos <https://youtu.be/Z5B02jkNpck> on how to accomplish this but
appear to be out of date. I noticed there is a gem5 doc on ISA Parsing
<https://www.gem5.org/documentation/general_docs/architecture_support/isa_parser/>
that has a few unfinished sections.
I tried following the tutorial but have run into some issues getting the
RISC-V tools to compile.
After spending a lot of time trying to build things, I've found myself
stuck on this error when trying to build the riscv-pk project:
gcc: error: unrecognized argument in option '-mcmodel=medany'
gcc: note: valid arguments to '-mcmodel=' are: 32 kernel large medium small
make: *** [Makefile:319: file.o] Error 1
Does anyone know if I'm going down the wrong path here? Is there a good
tutorial that you recommend?
Thanks all,
Nick Felker
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