https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #7 from CVS Commits ---
The master branch has been updated by Jeff Law :
https://gcc.gnu.org/g:07e2576d6f344acab338deeb051845c90c1cf6a3
commit r14-116-g07e2576d6f344acab338deeb051845c90c1cf6a3
Author: Raphael Zinsly
Date: Thu Ap
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
Jeffrey A. Law changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
Andrew Waterman changed:
What|Removed |Added
CC||andrew at sifive dot com
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #2 from Jeffrey A. Law ---
It can certainly get "unduly weird". Basically such instructions get put at
the end of the ready queue as soon as its input dependencies are satisfied. If
there's only a few such instructions, then the re
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #3 from Andrew Waterman ---
Yikes. Thanks for the explanation, Jeff.
(cc Kito Cheng: at some point, we should revisit the pipeline modeling of Zb*
instructions for sifive-7. The short version is that all Zb* instructions can
execu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #4 from Jeffrey A. Law ---
Yea, thinking about our uarch, we're going to need finer control as well.
There's a subset that ought to execute in any ALU, but there's another subset
that are bound to a specific ALU and are potentially
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #5 from Jeffrey A. Law ---
So a datapoint in this effort.
For the Veyron V1, all the bitmanip instructions except clmul and cpop are
single cycle and can be handled by any of the 4 standard ALUs.
clmul, cpop are 4c and use the shar
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108248
--- Comment #6 from Andrew Pinski ---
(In reply to Jeffrey A. Law from comment #5)
> So a datapoint in this effort.
>
> For the Veyron V1, all the bitmanip instructions except clmul and cpop are
> single cycle and can be handled by any of the 4
