Hi, I’ve recently started to use cuda fortran and enjoyed it for my calculation of explicit dynamic finite element analysis.
I am using 15.5 version of PGI cuda fortran compiler on the Windows7(64bit) OS using Tesla K20c (Cuda 6.5).
I want to ask you one thing about “atomicadd”.
Please tell me, can I officially use
atomicadd(variable with real(kind=8),variable with real(kind=8))?
double precision atomicadd can be used as CUDA Fortran 2012/2013 Features PGI 2012 (CUDA 4.1 and 4.2)
Support for double precision atomicadd
Is this really true?
The reason why I ask this is because of CUDA Fortran Programming Guide and Reference Version 2015 (https://www.pgroup.com/doc/pgicudaforug.pdf) “3.6.6. Atomic Functions” says “These atomic functions read and return the value of the first argument. They also combine that
value with the value of the second argument, depending on the function, and store the combined
value back to the first argument location. Both arguments must be of type integer(kind=4).”
Thus, this user’s guide says we cannot use kind=8.
Which information is true?
Thank you in advance for your attention to this matter,