Do IPP functions handle special values like quiet NaN/inf strictly following the IEEE 754 way?
How IPP functions handle data that contain special values?
пн, 10/12/2012 - 21:21
How IPP functions handle data that contain special values?
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пн, 10/12/2012 - 21:29
I mean, such as:
if x is a quiet NaN value, then do functions like ippsAddC_32f(x, yptr, length_of_y) returns strictly all NaNs despite whatever values stored in yptr?
Also how NaN values will be ranked when sorting some array that contain NaNs?
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пн, 10/12/2012 - 22:08
>>...Do IPP functions handle special values like quiet NaN...
>>...if x is a quiet NaN value, then do functions like ippsAddC_32f(x, yptr, length_of_y) returns strictly all NaNs despite whatever
>>values stored in yptr?
An IPP function could fail with Access Violation exception. It could also process data without Access Violation exception in a future release of IPP and please take a look at a similar thread:
http://software.intel.com/en-us/forums/showthread.php?t=106039&o=a&s=lr
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пн, 10/12/2012 - 22:52
Thanks, so the IPP functions are not stable with special values... thats too bad.
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пн, 10/12/2012 - 23:01
>>... the IPP functions are not stable with special values...
...It could also process data without Access Violation exception in a future release... and please take it into account. I wonder if somebody from IPP team could provide an update regarding the problem.
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вт, 11/12/2012 - 23:43
IPP libraries strictly follow IEEE 754 for floating point numbers. That means a bug in realization if you find different/undesirable behavior for any IPP function - so be so kind - submit a bug to QuAD or post a message here, please. Regarding ippiRotate - it has been already fixed - use 7.1. version, please. 2 Sergey Kostrov: I don't know any other IPP function that fails with AV because of special FP values in parameters - if you know - be so kind, share this info here, please.
PS I think you know an anecdote about Japanese gasoline-powered saw...
Regards,
Igor