[Libre-soc-dev] daily kan-ban update 26mar2022

[Luke Kenneth Casson Leighton]

On Sun, Mar 27, 2022 at 7:12 AM Tobias Platen <libre-soc at platen-software.de>
wrote:


> at least partially:
> ERROR: IO 'wishbone_insn_out.we' is unconstrained in LPF (override this
> error with --lpf-allow-unconstrained)
>
> So wishbone_insn_out has to be added to libre-soc core I think.
>

no.  the signal name *is* "wishbone_insn_out.we"

yosys is probably trying to remove it, or it's not used but is still
"hanging about"

the most likely reason that yosys has tried to remove it is:
writes are never performed to the instruction bus, only reads.

therefore in effect there *is* no such signal needed.

l.