Bug#1100781: yosys: Bring back i386/32bit support

[Scott Ashcroft]

On Tue, 2025-03-18 at 16:59 +0100, Daniel Gröber wrote:
> Actually we really ought to look into doing some more un-vendoring in yosys
> in general.

It looks like at least in yosys they apply their own patches so it
might not be that easy.

Some progress on making 32-bit work again.

I've managed to figure out the iverilog out of memory problem.
This ancient iverilog issue:

https://github.com/steveicarus/iverilog/issues/60

Refers to this commit:

https://github.com/YosysHQ/yosys/commit/95944eb69e45837516ff9c0cba54f77ab89af754

which fixed up $mem for the same issue.

At some point $print got added and it needs the same fix. See attached
patch.

That only leaves the cxxrtl tests failing. I don't think fixing them
will be as straightforward.

Cheers,
Scott
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