From: Jan Hubicka <hubicka@ucw.cz>
To: Richard Biener <richard.guenther@gmail.com>
Cc: gcc-patches@gcc.gnu.org, mjambor@suse.cz,
Alexander Monakov <amonakov@ispras.ru>,
"Kumar, Venkataramanan" <Venkataramanan.Kumar@amd.com>,
Tejas Sanjay <TejasSanjay.Joshi@amd.com>
Subject: Re: Zen4 tuning part 1 - cost tables
Date: Tue, 6 Dec 2022 12:24:55 +0100 [thread overview]
Message-ID: <Y48mh6lYmlp1uoBc@kam.mff.cuni.cz> (raw)
In-Reply-To: <CAFiYyc0SZ6aRW-UPhdq16FxU94NxRkkD+WvfN1+raw=N3yqpow@mail.gmail.com>
> > - COSTS_N_INSNS (5), /* cost of FADD and FSUB insns. */
> > - COSTS_N_INSNS (5), /* cost of FMUL instruction. */
> > + COSTS_N_INSNS (7), /* cost of FADD and FSUB insns. */
> > + COSTS_N_INSNS (7), /* cost of FMUL instruction. */
> > /* Latency of fdiv is 8-15. */
> > COSTS_N_INSNS (15), /* cost of FDIV instruction. */
> > COSTS_N_INSNS (1), /* cost of FABS instruction. */
> > COSTS_N_INSNS (1), /* cost of FCHS instruction. */
> > /* Latency of fsqrt is 4-10. */
>
> the above comment looks like it needs updating as well
You are right. I will go through the comments for all zen revisions
incrementally. Many of them are outdated are still referes to znver1.
Honza
next prev parent reply other threads:[~2022-12-06 11:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-06 10:00 Jan Hubicka
2022-12-06 10:20 ` Richard Biener
2022-12-06 11:24 ` Jan Hubicka [this message]
2022-12-08 9:43 ` Kumar, Venkataramanan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y48mh6lYmlp1uoBc@kam.mff.cuni.cz \
--to=hubicka@ucw.cz \
--cc=TejasSanjay.Joshi@amd.com \
--cc=Venkataramanan.Kumar@amd.com \
--cc=amonakov@ispras.ru \
--cc=gcc-patches@gcc.gnu.org \
--cc=mjambor@suse.cz \
--cc=richard.guenther@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).