C:\test>r80test

Is "r80test" readily available ? (Could be handy.)

kcott's post demonstrates that the discrepancy also occurs when the nvtype is 'double' - but not universally according to some quick testing that I've just done. (The discrepancy occurs with gcc-4.6.3 on linux, and MSVC++ 7.0 on MS Windows, but not gcc-4.7.0 on MS Windows. In all instances the compiler I've used is the compiler that actually built perl. It seems that the behaviour does depend upon the compiler in use, not upon the version number of perl, but that's not properly tested yet.)

I've just rewritten the demo code so that it's also portable to perls whose nvtype is 'double'. (See my reply to kcott's post.)

And now I find that the mpfr library is providing varying results on linux and windows. It shouldn't do that, but I'll have to check the versions of mpfr that I'm running. (It may simply be a bug in an earlier version that has been fixed.)

Thanks Buk.

Cheers,
Rob

In reply to Re^2: When 1e-298L != 1e-298L by syphilis
in thread When 1e-298L != 1e-298L by syphilis

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