Boris Gubenko wrote:
I'm checking with the OS folks and will report back here, for both HP-UX/ia64 and Tru64 Alpha.
And the answer is:
You are correct that both platforms are capable of executing in either endianness. However, the operating systems operate in only one. HP-UX is *always* big endian Tru64 is *always* little endian [...] Summary: A compile time check is adequate.
So, with current <endian.hpp>, I think, that we are all set for these platforms. Thanks, Boris ----- Original Message ----- From: "Boris Gubenko" <Boris.Gubenko@hp.com> To: <boost@lists.boost.org> Cc: "Boris Gubenko" <Boris.Gubenko@hp.com> Sent: Tuesday, October 17, 2006 9:12 AM Subject: Re: [boost] Optimized portable isnan, isfinite, fpclassify etc
Now endian.hpp defines BOOST_BIG_ENDIAN on HP-UX. This was suggested by Boris Gubenko.
If you are right John, then this seems to be incorrect. Shouldn't endian.hpp then define something like BOOST_UNKNOWN_ENDIAN on HP-UX?
Boris, do you have any comments on this?
I'm checking with the OS folks and will report back here, for both HP-UX/ia64 and Tru64 Alpha.
Thanks, Boris
----- Original Message ----- From: "Johan Råde" <rade@maths.lth.se> To: <boost@lists.boost.org> Sent: Tuesday, October 17, 2006 9:00 AM Subject: Re: [boost] Optimized portable isnan, isfinite, fpclassify etc
John Maddock wrote:
I'm not completely certain, but I believe HP-UX falls into this category: the idea is that you can pass binary data from one platform to another, and just switch the endianness bit to access it natively (think distributed applications).
Now endian.hpp defines BOOST_BIG_ENDIAN on HP-UX. This was suggested by Boris Gubenko.
If you are right John, then this seems to be incorrect. Shouldn't endian.hpp then define something like BOOST_UNKNOWN_ENDIAN on HP-UX?
Boris, do you have any comments on this?
Then my fpclassify could use a fast implementation when BOOST_BIG_ENDIAN or BOOST_LITTLE_ENDIAN is defined and a slower implementation when BOOST_UNKNOWN_ENDIAN is defined.
--Johan
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