Re: [Qemu-devel] [sw-dev] [RFC] RISC-V Decoder generator

[Richard W.M. Jones]

On Fri, Oct 20, 2017 at 03:46:54PM +0200, Bastian Koppelmann wrote:
> I asked you for feedback some while ago regarding a modular RISC-V QEMU
> target (see discussion [1]). I tried getting it to work with the good
> old C preprocessor and quickly realized that it is too limiting. Instead
> I created a data-driven decoder generator written in python (see the
> code on github [2]) using YAML as a description language.
> 
> I'd like to get some feedback whether this is acceptable to be
> upstreamed to QEMU or if you have any suggestions for improvements.
> Right now only RV32I instruction are implemented in this scheme.

My suggestion would be to reimplement (part of) the s390x decoder
using this scheme.  That would give us a direct comparison of how your
scheme is better or worse than the existing macros.

Will you be at the KVM Forum next week?

Rich.

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