[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=5768

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
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              Flags|                            |security-

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[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2008-04-10 14:18 -------
Changes applied to cvs.

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


http://sourceware.org/bugzilla/show_bug.cgi?id=5768

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[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[sjmunroe at us dot ibm dot com]

------- Additional Comments From sjmunroe at us dot ibm dot com  2008-02-22 21:37 -------
Created an attachment (id=2289)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2289&action=view)
Add Signalling NaN test to make check

This patch adds a signaling NaN test to make check

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[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[sjmunroe at us dot ibm dot com]

------- Additional Comments From sjmunroe at us dot ibm dot com  2008-02-18 23:20 -------
Created an attachment (id=2271)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2271&action=view)
Patch to replace the failing isnan.c with correct isnan.S implementation

This is simple enough to write in assembler and prevent GCC from rearranging
the code.

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[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[sjmunroe at us dot ibm dot com]

------- Additional Comments From sjmunroe at us dot ibm dot com  2008-02-18 23:12 -------
For powerpc[64] isnan() and isnanf() fail since they share the same
implementation. isnanl() is Ok because it uses the generic implementation from
/ieee754/ldbl-128ibm/. isinf, isfinite, isnormal, and fpclassify are also OK.

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           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=5768

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[Bug math/5768] isnan() will throw SIGFPE with signalling NaN

[sjmunroe at us dot ibm dot com]

------- Additional Comments From sjmunroe at us dot ibm dot com  2008-02-18 23:07 -------
Created an attachment (id=2270)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=2270&action=view)
Test case for signalling NaNs

Compile with:

gcc -O2 -g -std=gnu99 -fno-builtin test-isnan.c -lm -o test-isnan

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