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Message-ID: <87plyk11n4.fsf@oldenburg.str.redhat.com>
Date: Tue, 02 Jan 2024 11:16:15 +0100
From: Florian Weimer <fweimer@...hat.com>
To: Rich Felker <dalias@...c.org>
Cc: John M <johnm@...incalibration.de>, musl@...ts.openwall.com
Subject: Re: Wrong rounding in printf when precision is not set to max
* Rich Felker:
> Note that, even then, there are lots of gotchas. The x87's "single"
> and "double" modes are not actually IEEE single and double, but
> nonstandard types with the IEEE significand precision but excess
> exponent range that's truncated via double-rounding whenever the
> intermediate is spilled to memory.
Doesn't setting the control word avoid double rounding?
Thanks,
Florian
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