Re: [boost] Optimized portable isnan, isfinite, fpclassify etc

From: Johan Råde (rade_at_[hidden])
Date: 2006-10-10 13:34:14

John Maddock wrote:
> Johan Råde wrote:
>> What is going on here?
>> Error in <limits>?
>> That would not be the first time.
> 
> I don't know, if that's the Intel/linux failures it's optimizer related, the 
> test passes without the optimizations cranked up.
> 
> If you have a new revision with fixed isnan logic I'll test them again.
> 
> John. 
> 
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Here is a new version, with a pinch of paranoia added.
There are no floating point comparisons at all,
except for a few == 0 and != 0.
Therefore I expect it to be immune against optimizing compilers.

(I have added a cpp file to avoid ODR violations.
It may eventually be possible to remove the cpp file,
if we can turn the constants into compile time constants.
I bit of ifdef logic will be needed for that.)

(This version does not undefine any macros either.)

--Johan