Date: Mon, 29 Jul 2013 17:04:48 -0400 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: Conformance issues to address after 0.9.12 release On Mon, Jul 29, 2013 at 06:00:46PM +0200, Szabolcs Nagy wrote: > * Rich Felker <dalias@...ifal.cx> [2013-07-29 02:34:56 -0400]: > > - i387 math asm does not truncate excess precision. Whether or not > > this omission is conforming in terms of the return value, it results > > in lost underflow exceptions, as demonstrated by nsz's math tests. > > the underflow problem is not i387 or excess precision related: > many (odd) math functions are almost the identity function > around x==0 (sin,asin,tan,atan,sinh,atanh,..) In the case of asin, etc it _is_ the excess precision. Rich
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