[libre-riscv-dev] Why The Dual ISA

[Adam Van Ymeren]

On 2020-01-19 01:40 PM, Luke Kenneth Casson Leighton wrote:
> On Monday, January 20, 2020, Adam Van Ymeren <adam at vany.ca> wrote:
>
>> That conversation may be easier to have now rather than after receiving
>> another year or two of funding.  It's not just the added work of
>> supporting dual-ISA.  Every decision made going forward on the design
>> will be influenced by this need to support dual-ISA whether consciously
>> or not.  A year spent trying to build dual-ISA _could_ be worth 2 years
>> spent building just one.
>
> decoders for RISC architectures simply do not take that long to write.
>
> the CSRs etc may be more challenging.
>
> we will have to see.
>
> l.

Good point, this whole conversation may be moot, as its really not much
of a problem.  Sorry for adding to the noise.

-Adam