From: Janus Weil <janus@gcc.gnu.org>
To: Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc: gfortran <fortran@gcc.gnu.org>, gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: [Patch, Fortran] PR 82143: add a -fdefault-real-16 flag
Date: Mon, 18 Sep 2017 17:57:00 -0000 [thread overview]
Message-ID: <CAKwh3qiSX8GkoHogT5PiL3eb9XeyOQXAt2JS2Qz6N0xurRMKmA@mail.gmail.com> (raw)
In-Reply-To: <20170918140823.GA83251@troutmask.apl.washington.edu>
2017-09-18 16:08 GMT+02:00 Steve Kargl <sgk@troutmask.apl.washington.edu>:
> On Mon, Sep 18, 2017 at 09:02:22AM +0200, Janus Weil wrote:
>> Hi Steve,
>>
>> >> attached is a (technically) simple patch that implements the compiler
>> >> flag "-fdefault-real-16" for gfortran.
>> >
>> > What about -fdefault-real-10? If you're going to add bloat to the
>> > compiler, then you might as well to it right.
>>
>> well, yeah. If my only aim was to add bloat to the compiler out of
>> plain boredom and nastiness, then I might as well add
>> -fdefault-real-37. But I don't think that would be very useful.
>
> Why? One gets 11-bits of additional precision (on most platforms)
> and a significant increase in the exponent range (+- ~1024 to
> +- ~16384). REAL(10) maps to hardware floating point, which is
> faster than software quad precision.
Well, ok. If adding -fdefault-real-10 was a serious suggestion from
your side (which was not so easy to tell through all the sarcasm), I
can surely add that as well.
Cheers,
Janus
next prev parent reply other threads:[~2017-09-18 17:57 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-17 20:42 Janus Weil
2017-09-18 4:51 ` Steve Kargl
2017-09-18 7:02 ` Janus Weil
2017-09-18 14:08 ` Steve Kargl
2017-09-18 17:57 ` Janus Weil [this message]
2017-09-21 7:10 ` Janus Weil
2017-09-21 20:38 ` Steve Kargl
2017-09-22 5:03 ` Janus Weil
2017-09-22 7:12 ` Janne Blomqvist
2017-09-22 9:44 ` Janus Weil
2017-09-22 19:32 ` Janus Weil
2017-09-23 13:19 ` Janus Weil
2017-09-22 14:06 ` Steve Kargl
2017-09-18 9:31 Dominique d'Humières
2017-09-18 18:13 ` Janus Weil
2017-09-22 10:06 ` Dominique d'Humières
2017-09-22 11:21 ` Janus Weil
2017-09-22 14:37 ` Steve Kargl
2017-09-22 22:46 ` Dominique d'Humières
2017-09-22 23:47 ` Steve Kargl
2017-12-03 17:36 ` Gerald Pfeifer
2017-09-18 9:38 Dominique d'Humières
2017-09-25 15:07 David Edelsohn
2017-09-25 21:14 ` Janus Weil
2017-09-25 21:23 ` Steve Kargl
2017-09-26 8:44 ` Janus Weil
2017-09-26 9:03 ` Janus Weil
2017-09-26 9:12 ` Rainer Orth
2017-09-26 9:47 ` Janus Weil
2017-09-26 14:54 ` David Edelsohn
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=CAKwh3qiSX8GkoHogT5PiL3eb9XeyOQXAt2JS2Qz6N0xurRMKmA@mail.gmail.com \
--to=janus@gcc.gnu.org \
--cc=fortran@gcc.gnu.org \
--cc=gcc-patches@gcc.gnu.org \
--cc=sgk@troutmask.apl.washington.edu \
/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).