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From: Dan Gohman <sunfish@mozilla.com>
Newsgroups: gmane.linux.lib.musl.general
Subject: new exp fails erfc in libc-test
Date: Wed, 7 Aug 2019 17:47:54 -0700
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As of the patch which introduced the new exp implementations:

http://git.musl-libc.org/cgit/musl/commit/?id=e16f7b3c02e17d0ace779a11f0d53a9c05fdd434

I am seeing a test failure in the erfc test in libc-test on at least x86-64
(erfc calls exp internally):

src/math/special/erfc.h:6: RN erfc(0x1.5db559fe5c0bap+0) want
0x1.b53cf571d328fp-5 got 0x1.b53cf571d328cp-5 ulperr -2.609 = -0x1.8p+1 +
0x1.900982p-2

Please let me know if there's any other information which would be useful.

Dan

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<div dir=3D"ltr"><div>As of the patch which introduced the new exp implemen=
tations:</div><div><br></div><div><a href=3D"http://git.musl-libc.org/cgit/=
musl/commit/?id=3De16f7b3c02e17d0ace779a11f0d53a9c05fdd434">http://git.musl=
-libc.org/cgit/musl/commit/?id=3De16f7b3c02e17d0ace779a11f0d53a9c05fdd434</=
a></div><div><br></div><div>I am seeing a test failure in the erfc test in =
libc-test on at least x86-64 (erfc calls exp internally):<br></div><div><br=
></div><div>src/math/special/erfc.h:6: RN erfc(0x1.5db559fe5c0bap+0) want 0=
x1.b53cf571d328fp-5 got 0x1.b53cf571d328cp-5 ulperr -2.609 =3D -0x1.8p+1 + =
0x1.900982p-2</div><div><br></div><div>Please let me know if there&#39;s an=
y other information which would be useful.</div><div><br></div><div>Dan</di=
v><div><br></div></div>

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