[Bug math/6808] yn() does not set errno for overflow error.

[Bug math/6808] yn() does not set errno for overflow error.

[jsm28 at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aj at suse dot de           |unassigned at sourceware
                   |                            |dot org

--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-03-01 21:00:56 UTC ---
Confirmed with current sources on both x86 and x86_64.

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[Bug math/6808] yn() does not set errno for overflow error.

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |polacek at redhat dot com
         AssignedTo|unassigned at sourceware    |polacek at redhat dot com
                   |dot org                     |

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[Bug math/6808] yn() does not set errno for overflow error.

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #3 from Marek Polacek <polacek at redhat dot com> 2012-05-09 12:40:48 UTC ---
I have a patch.

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[Bug math/6808] yn() does not set errno for overflow error.

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |14173

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[Bug math/6808] yn() does not set errno for overflow error.

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Bug 6808 depends on bug 14173, which changed state.

Bug 14173 Summary: ynl() returns wrong value for LDBL_MIN
http://sourceware.org/bugzilla/show_bug.cgi?id=14173

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

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[Bug math/6808] yn() does not set errno for overflow error.

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=6808

Marek Polacek <polacek at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Marek Polacek <polacek at redhat dot com> 2012-07-25 11:00:26 UTC ---
Fixed.

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[Bug math/6808] yn() does not set errno for overflow error.

[mtk.manpages at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=6808

--- Comment #5 from Michael Kerrisk <mtk.manpages at gmail dot com> ---
The fix was commit 354691b7b55d014b9a4d3a94e2f8f934870b6bff
glibc 2.17

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[Bug math/6808] yn() does not set errno for overflow error.

[mtk.manpages at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=6808

--- Comment #6 from Michael Kerrisk <mtk.manpages at gmail dot com> ---
Manual page updated to note the bug fix.

--- a/man3/y0.3
+++ b/man3/y0.3
@@ -208,13 +208,10 @@ for this case.
 .TP
 Range error: result overflow
 .\" e.g., yn(10, 1e-40) on glibc 2.8/x86-32
-.\" .I errno
-.\" is set to
-.\" .BR ERANGE .
 .I errno
-is not set for this case.
-.\" FIXME . Is it intentional that errno is not set?
-.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6808
+is set to
+.BR ERANGE
+(but see BUGS).
 An overflow floating-point exception
 .RB ( FE_OVERFLOW )
 is raised.
@@ -262,6 +259,12 @@ and no
 exception was raised.
 as POSIX.1-2004 requires.
 .PP
+Before glibc 2.17,
+.\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6808
+did not set
+.I errno
+for "range error: result underflow".
+.PP
 In glibc version 2.3.2 and earlier,
 .\" Actually, 2.3.2 is the earliest test result I have; so yet
 .\" to confirm if this error occurs only in 2.3.2.

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[Bug math/6808] yn() does not set errno for overflow error.

[mtk dot manpages at gmail dot com]

------- Additional Comments From mtk dot manpages at gmail dot com  2008-07-31 12:40 -------
Created an attachment (id=2880)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2880&action=view)
test program

Sample run showing the problem:

$ /tmp/mt_yn 10 dbl_min
errno == 0
fetestexcept() says:  FE_OVERFLOW FE_INEXACT
yn(10,2.22507385850720138e-308)=-inf
0 FE_OVERFLOW -inf

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