From: Denis Chertykov <chertykov@gmail.com>
To: Georg-Johann Lay <avr@gjlay.de>
Cc: gcc-patches@gcc.gnu.org, Eric Weddington <eric.weddington@atmel.com>
Subject: Re: [Patch,AVR]: Tweak 8-bit parity expansion
Date: Fri, 28 Oct 2011 14:49:00 -0000 [thread overview]
Message-ID: <CADOs=zZ4jcS+a74RQtYopQQ4Mgk=jcxo8-+5ZHNgbneH9z8uNQ@mail.gmail.com> (raw)
In-Reply-To: <4EAAB049.7010006@gjlay.de>
2011/10/28 Georg-Johann Lay <avr@gjlay.de>:
> This is minor tweak to support 8-bit parity.
>
> Otherwise, the input operand of 8-bit values will be extended before parity
> computation.
>
> The final representation as libgcc call is not generated in split1 and no more
> in expand. Notice that
>
> - combine is not allowed to propagate hard regs into zero-extends.
> - combine does not try parity:QI
>
> Ok for trunk?
>
> Johann
>
> * config/avr/avr.md (parityhi2): Expand allowing pseudos.
> (*parityhi2): New pre-reload insn-and-split to map 16-bit parity
> to the libgcc insn.
> (*parityqihi2): Same for 8-bit parity.
>
Approved.
Denis.
prev parent reply other threads:[~2011-10-28 14:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-28 14:34 Georg-Johann Lay
2011-10-28 14:49 ` Denis Chertykov [this message]
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='CADOs=zZ4jcS+a74RQtYopQQ4Mgk=jcxo8-+5ZHNgbneH9z8uNQ@mail.gmail.com' \
--to=chertykov@gmail.com \
--cc=avr@gjlay.de \
--cc=eric.weddington@atmel.com \
--cc=gcc-patches@gcc.gnu.org \
/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).