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Re: std::numeric_limits::is_iec559
Gabriel Dos Reis wrote:
Roberto Bagnara <bagnara@cs.unipr.it> writes:
| I have always used std::numeric_limits::is_iec559 thinking that,
| as per the C++ standard, it yielded "[t]rue if and only if the type
| adheres to IEC 559 standard."
|
| On a Mac OS X 10.4 machine with GCC 4.0.1, however, I get the value
| true for long doubles but, as far as I can tell, the layout of
| long doubles there does not conform to the 128-bit format specified
| by IEC 559.
I don't follow. Exactly in what aspect do you believe the Mac OS X
10.4 representation is not conformant to IEC 559?
From your question I gather that IEC 559 does not specify a binary
format for 128-bit numbers. If that is the case, than that is one
of the things I was missing.
Thanks,
Roberto
--
Prof. Roberto Bagnara
Computer Science Group
Department of Mathematics, University of Parma, Italy
http://www.cs.unipr.it/~bagnara/
mailto:bagnara@cs.unipr.it