From: Corinna Vinschen <vinschen@redhat.com>
To: newlib@sourceware.org
Subject: Re: gcc 11.1.0: printf("%.43f\n", 0x1.52f8a8e32e982p-140): printed value is incorrectly rounded
Date: Thu, 4 Nov 2021 21:57:56 +0100 [thread overview]
Message-ID: <YYRJVIfv9on+KTcZ@calimero.vinschen.de> (raw)
In-Reply-To: <87ilx7vpco.fsf@keithp.com>
[Please don't CC me on list replies. I set "Reply-To:" for a reason.
Thanks!]
On Nov 4 09:48, Keith Packard wrote:
> Corinna Vinschen <vinschen@redhat.com> writes:
>
> > Is anybody here willing to take a look and change Newlib to gdtoa?
>
> It might be useful for newlib to adopt the Ryū floating point conversion
> code developed by Ulf Adams (currently at Google). This does correct
> double conversion in 128 bits, avoiding need for arbitrary precision
> math and any allocations.
>
> https://dl.acm.org/doi/10.1145/3360595
>
> There is a BSD licensed implementation of the core algorithm available
> on github; adopting that into complete printf/scanf implementations
> isn't a huge amount of work. picolibc uses this implementation.
Sounds like a great idea, too. This may drop code size as well, which
is always good.
Thanks,
Corinna
next prev parent reply other threads:[~2021-11-04 20:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAL9Mx1uMOz2wfqbMpD_xfA=D9JkpFzVz6AR_DKHK34AvrGOP6w@mail.gmail.com>
2021-11-03 21:26 ` Fwd: " Pavel M
2021-11-04 12:24 ` Corinna Vinschen
2021-11-04 16:48 ` Keith Packard
2021-11-04 17:27 ` Dave Nadler
2021-11-04 17:58 ` Keith Packard
2021-11-04 21:28 ` Brian Inglis
2021-11-05 2:54 ` Keith Packard
2021-11-05 16:00 ` Steven Abner
2021-11-06 12:06 ` Steven Abner
2021-11-06 23:25 ` Steven Abner
2021-11-08 9:57 ` Corinna Vinschen
2021-11-04 20:57 ` Corinna Vinschen [this message]
2021-11-28 7:43 ` Takashi Yano
2021-11-28 12:38 ` Takashi Yano
2021-11-28 13:16 ` Takashi Yano
2021-11-29 10:56 ` Takashi Yano
2021-11-29 14:24 ` Takashi Yano
2021-11-29 15:55 ` Corinna Vinschen
2021-11-30 10:51 ` Takashi Yano
2021-11-30 15:09 ` Corinna Vinschen
2021-11-30 20:38 ` Takashi Yano
2021-11-30 21:17 ` Takashi Yano
2021-12-06 9:53 ` Corinna Vinschen
2021-12-06 10:26 ` Takashi Yano
2021-12-01 12:05 ` Takashi Yano
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