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From: Jon Chesterfield <jonathanchesterfield@gmail.com>
To: musl@lists.openwall.com
Subject: Re: Cortex-M support / single float
Date: Thu, 13 Sep 2018 12:30:45 +0100	[thread overview]
Message-ID: <CAOUYtQA4aBhpTZMeOLDPzb15xRoB0bzZbJD6Jv6-p6p_6XerWg@mail.gmail.com> (raw)

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> note that a large part of the float code in libc is in the
> math library which expects efficient double arithmetics,
> i plan to rewrite the most important single precision math
> functions using double arithmetics, this gives significant
> benefits on all systems except ones with single precision
> only hw.
>

I'm responsible for libm on an architecture with 32bit float in hardware
and 64bit float via integer ops. It's derived from musl because I like musl.

Currently operations written in terms of double are rather slow. Would
upstream accept functions optimised for a 32bit float+int system? I haven't
written them yet but it's on the todo list.

Cheers

Jon

>

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             reply	other threads:[~2018-09-13 11:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-13 11:30 Jon Chesterfield [this message]
2018-09-13 12:51 ` Szabolcs Nagy
2018-09-13 15:39 ` Rich Felker

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