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32 lines
927 B
Plaintext
32 lines
927 B
Plaintext
@node isfinite
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@section @code{isfinite}
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@findex isfinite
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POSIX specification: @url{http://www.opengroup.org/susv3xsh/isfinite.html}
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Gnulib module: isfinite
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Portability problems fixed by Gnulib:
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@itemize
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@item
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This macro is missing on some platforms:
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MacOS X 10.3, OpenBSD 3.8, AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 10, Interix 3.5.
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@item
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This macro incorrectly yields true for some @samp{double} arguments, on some
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platforms:
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Linux/ia64 (signalling NaNs).
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@item
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This macro incorrectly yields true for some @samp{long double} arguments, on
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some platforms:
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x86 (pseudo-zeroes, unnormalized numbers, pseudo-denormals),
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x86_64 (pseudo-denormals),
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ia64 (pseudo-NaN, pseudo-Infinity, pseudo-zeroes, unnormalized numbers, pseudo-denormals).
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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It is implementation-dependent whether @code{isfinite} raises an
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exception given a signaling NaN operand.
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@end itemize
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