[Insight-developers] level set/vnl problems on SGI?

[Bill Hoffman]

It looks like they are doing the right thing:

vcl/sgi/vcl_cmath.h
inline float       vcl_sqrt(float  x) { return ::sqrtf(x); }
inline double      vcl_sqrt(double x) { return ::sqrt(x); }
inline long double vcl_sqrt(long double x) { return ::sqrtl(x); }

inline float       vcl_abs (float       x) { return ::fabsf(x); }
inline double      vcl_abs (double      x) { return ::fabs(x); }
inline long double vcl_abs (long double x) { return ::fabsl(x); }

However, perhaps this is the problem.   Perhaps the code is
depending on a promotion to double for some of the operations,
and the SGI is using float versions.   sqrt and abs are the only
ones with the problem. 



-Bill


At 10:03 AM 4/8/2003, Miller, James V (Research) wrote:
>I believe the SGI provides overloaded versions of 
>abs and sqrt for various data types.
>
>I would guess that these vnl functions are not being 
>properly defined on the SGI.
>
>Jim
>
>
>> -----Original Message-----
>> From: Bill Hoffman [mailto:bill.hoffman@kitware.com]
>> Sent: Monday, April 07, 2003 3:09 PM
>> To: Lydia Ng; insight-developers@public.kitware.com
>> Subject: Re: [Insight-developers] level set/vnl problems on SGI?
>> 
>> 
>> There are no known issues with these functions, and
>> they are being used in other places that seem to work.
>> However, it sounds like you are close to finding the problem.
>> I would suggest adding some more prints, so we can find
>> out exactly where things start to differ, and which of the
>> functions is causing the trouble.
>> 
>> -Bill
>> 
>> 
>> 
>> 
>> >I think March 17th was around the time the VNL stuff was 
>> being changed
>> >over.
>> >The LevelSetFunction uses the following vnl/vcl functions:
>> >
>> > vnl_math_abs
>> > vnl_math_min
>> > vnl_math_max
>> > vcl_sqrt
>> >
>> >
>> >Are there any known issues with any of these functions on SGI?
>> >
>> >
>> >- Lydia
>> >
>> 
>> 
>> 
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