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about multiprecision

 
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Teslalady



Joined: 16 Mar 2012
Posts: 75

PostPosted: Thu Jul 12, 2012 9:34 pm    Post subject: about multiprecision Reply with quote

Dear Mat,

COuld OpenACC support the codes of multiprecision ?

our customer's codes is multiprecision fortran...and because of time issue, they think it is possible to optmize them with CUDA fortran. They hope to try OpenACC.
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mkcolg



Joined: 30 Jun 2004
Posts: 6206
Location: The Portland Group Inc.

PostPosted: Fri Jul 13, 2012 11:21 am    Post subject: Reply with quote

Hi Teslalady,

Can you please clarify what is meant by "multiprecision"?

I think you mean double precision (i.e. 64-bit) floating point numbers, in which case, then yes, OpenACC does support double precision.

- Mat
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Teslalady



Joined: 16 Mar 2012
Posts: 75

PostPosted: Sun Jul 15, 2012 8:34 pm    Post subject: Reply with quote

multiprecision means:4-times precision,8-times precision.....OpenMP and CUDA support multiprecison...so I just want to know whether PGI OpenACC support it. I'm just studying the OpenACC
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mkcolg



Joined: 30 Jun 2004
Posts: 6206
Location: The Portland Group Inc.

PostPosted: Mon Jul 16, 2012 9:07 am    Post subject: Reply with quote

Sorry, but I still need more information on exactly what you're looking for.

In searching, I do see multiple Multiprecision libraries which allow the users to use arbitrary precision arithmetic (For example: http://en.wikipedia.org/wiki/GNU_Multiple_Precision_Arithmetic_Library) and I do see that at least one is implemented using OpenMP. However, these are not part of the OpenMP language itself, but rather an external library. Is this what you're looking for?

- Mat
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