[Libre-soc-dev] MUX was Re: Daily Kanban 2020aug10

Luke Kenneth Casson Leighton lkcl at lkcl.net
Tue Aug 11 15:56:47 BST 2020

On Mon, Aug 10, 2020 at 11:03 PM <whygee at f-cpu.org> wrote:

> The method has positive benefit starting with MUX8, and I think Power
> has banks of32 regs so the gain is a no-brainer.
> The only "cost" is to shuffle the register numbering internally.

one minor issue: we're not doing binary-addressed regfiles, they're
unary-addressed.  also we will have 128 INT regs not 32.

currently i am OR-tree-reducing the read-enable signals by way of
MUXes "read_enable ? read_signal : 0"


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