From: Joseph Myers <josmyers@redhat.com>
To: Krishna Narayanan <krishnanarayanan132002@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: [RISC-V] Support for trapping math in RISC-V
Date: Mon, 29 Apr 2024 20:28:31 +0000 (UTC) [thread overview]
Message-ID: <465937-78a-b98c-14fa-f27a12d83894@redhat.com> (raw)
In-Reply-To: <CABhGnjun9tAHyw2s4tc8q42vN-mn7+vL9yUBF=bHPPM9c0bMQw@mail.gmail.com>
On Wed, 24 Apr 2024, Krishna Narayanan via Gcc wrote:
> Hi all,
> Is the RISC-V community planning to add support for trapping math in RISC-V
> in the near future!?
> This LLVM thread
> https://discourse.llvm.org/t/trapping-math-for-risc-v/72168/7 suggests a
> software emulation of traps, is the GNU team also on similar lines to this
> implementation or has some different views.
That strategy sounds both very slow and not even complete (it doesn't
cover the case of exact underflow, which doesn't raise the exception flag,
but should signal the exception when trapping is enabled).
Traps are not part of standard C. I'm not aware of any implementations of
the TS 18661-5 interfaces to alternate exception handling either.
--
Joseph S. Myers
josmyers@redhat.com
prev parent reply other threads:[~2024-04-29 20:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-24 12:53 Krishna Narayanan
2024-04-29 20:28 ` Joseph Myers [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=465937-78a-b98c-14fa-f27a12d83894@redhat.com \
--to=josmyers@redhat.com \
--cc=gcc@gcc.gnu.org \
--cc=krishnanarayanan132002@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).