Re: [patch][rfa] Don't Generate Code to Support Unused Write Stacks

brolley wrote:

> [...]
> When generating write stacks and the supporting code in order to
> suppor the (delay ...) rtl construct for SID, cgen currently generates
> a write stack for all registers and memory modes regardless of whether
> they are used or not. [...]
> For the internal port for which performance was an issue, this yielded
> an improvement of 17%. [...]

Sounds good.  I'm surprised though that your change should cause such
a noticeable improvement.  It may be that the sid-side code to handle
the write queue testing/iteration is rather deficient.  (Try adding
some UNLIKELY markers to the CPU::writeback() function's while()
conditions.)

- FChE