<div dir="ltr">Rolf, apart from the Fortan angle, may I strongly encourage that we adopt this datatype for MPI-4. It is part of real MPI codes already, but now we have to fake transfer datatypes as 16-bit integers or bytes... which means not really right if heterogeneous interoperability were to be maintained. And this is a canonical IEEE type now, as you note. There is also the "2 half-float" datatype (32-bits) at least in CUDA to be looked at; maybe ignored or maybe supported, but it is there too. Key to this MPI users and applications use half floats and 2 half-floats :-) in practice.<div><br></div><div>May I also suggest a forward look at the types in AVX-512, in case any of these become particularly relevant in future.</div><div>At least 8-bit integers are conceptually new, apart from BYTE. <a href="https://en.wikipedia.org/wiki/AVX-512">https://en.wikipedia.org/wiki/AVX-512</a> </div><div><br></div><div><div>Regards,</div><div>Tony</div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 16, 2017 at 6:52 AM, Rolf Rabenseifner <span dir="ltr"><<a href="mailto:rabenseifner@hlrs.de" target="_blank">rabenseifner@hlrs.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all together,<br>
<br>
I'm sitting in the MPI Forum Meeting and we discuss the new IEEE FP16<br>
datatype.<br>
<br>
Questions to the Fortran atandardization body:<br>
<br>
- Does the Fortran Standardization Body has already a proposal for<br>
the new name in Fortran for this IEEE FP16?<br>
<br>
- Will be REAL*2 identical to IEEE FP16?<br>
<br>
Best regards<br>
<span class="HOEnZb"><font color="#888888">Rolf<br>
<br>
--<br>
Dr. Rolf Rabenseifner . . . . . . . . . .. email <a href="mailto:rabenseifner@hlrs.de">rabenseifner@hlrs.de</a> .<br>
High Performance Computing Center (HLRS) . phone <a href="tel:%2B%2B49%280%29711%2F685-65530" value="+4971168565530">++49(0)711/685-65530</a> .<br>
University of Stuttgart . . . . . . . . .. fax <a href="tel:%2B%2B49%280%29711%20%2F%20685-65832" value="+4971168565832">++49(0)711 / 685-65832</a> .<br>
Head of Dpmt Parallel Computing . . . <a href="http://www.hlrs.de/people/rabenseifner" rel="noreferrer" target="_blank">www.hlrs.de/people/<wbr>rabenseifner</a> .<br>
Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307) .<br>
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</font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Tony Skjellum, PhD<br>RunTime Computing Solutions, LLC<br><a href="mailto:tony@runtimecomputing.com" target="_blank">tony@runtimecomputing.com</a><br>direct: +1-205-918-7514<br>cell: +1-205-807-4968<br></div></div></div>
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