From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: RE???[BUG][math]build musl with optimizing flags, some math functions are broken.
Date: Tue, 14 Oct 2014 17:33:42 +0200 [thread overview]
Message-ID: <20141014153342.GD4874@port70.net> (raw)
In-Reply-To: <tencent_07C7708762DD414A5A757808@qq.com>
* bobodog <8192542@qq.com> [2014-10-14 15:09:45 +0800]:
> Further confirmation, the problem is -ffast-math flag, just remove this flag, all tests passed, please fix this bug, the openbsd's msun math library, have not any problem with this flags.
>
how did you verify that openbsd "have not any problem with this flag" ?
(without looking at your methodology i can guarantee that openbsd
msun math library is completely broken with gcc -ffast-math too
unless openbsd explicitly disabled this option in their compiler..
they maintain their own compiler so they can implement -ffast-math
as a no-op, but a modern unpatched gcc with -ffast-math breaks all
math functions which depend on exact ieee arithmetics)
next prev parent reply other threads:[~2014-10-14 15:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-14 2:17 [math] The math library have some bug for ceil,floor,round functioin, in arm mode bobodog
2014-10-14 2:42 ` Rich Felker
2014-10-14 2:51 ` 回复： [musl] [math] The math library have some bug forceil,floor,round " bobodog
2014-10-14 3:03 ` Rich Felker
2014-10-14 4:11 ` 回复： [musl] 回复： [musl ] [math] The math library have some bugforceil,floor,round " bobodog
2014-10-14 6:26 ` RE：[musl ] [math] I Found math library's bug in ceil, floor, round functions, Using arm toolchains bobodog
2014-10-14 6:43 ` [BUG][math]build musl with optimizing flags, some math functions are broken bobodog
[not found] ` <tencent_07C7708762DD414A5A757808@qq.com>
2014-10-14 15:12 ` RE：[BUG][math]build " Rich Felker
2014-10-14 15:33 ` Szabolcs Nagy [this message]
2014-10-14 8:06 ` RE???[musl ] [math] I Found math library's bug in ceil, floor, round functions, Using arm toolchains Szabolcs Nagy
2014-10-14 3:04 ` 回复： [musl] The math library have some bug forceil,floor,round functioin, in arm mode bobodog
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