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From: "mtk.manpages at gmail dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug math/6778] expm1() raises bogus underflow exception for -large
Date: Sat, 23 May 2020 10:35:39 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D6778

--- Comment #4 from Michael Kerrisk <mtk.manpages at gmail dot com> ---
Fix documented for man-pages-5.07.

commit 4f16aab8244518d9f46fb6e8d4dc8e6e73266771
Author: Michael Kerrisk <mtk.manpages@gmail.com>
Date:   Sat May 23 11:45:36 2020 +0200

    expm1.3: The expm1() bogus underflow floating-point exception has been
fixed

    Fixed in glibc 2.17.

    See https://www.sourceware.org/bugzilla/show_bug.cgi?id=3D6778

    Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/expm1.3 b/man3/expm1.3
index a1fe0f7b2..460068a6d 100644
--- a/man3/expm1.3
+++ b/man3/expm1.3
@@ -144,13 +144,14 @@ T}        Thread safety   MT-Safe
 C99, POSIX.1-2001, POSIX.1-2008.
 .\" BSD.
 .SH BUGS
-For some large negative
+Before glibc 2.17,
+.\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=3D6778
+on certain architectures (e.g., x86, but not x86_64)
+.BR expm1 ()
+raised a bogus underflow floating-point exception
+for some large negative
 .I x
 values (where the function result approaches \-1),
-.BR expm1 ()
-raises a bogus underflow floating-point exception.
-.\" FIXME .
-.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=3D6778
 .PP
 For some large positive
 .I x

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