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by anonymousDan
1045 days ago
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Can you elaborate a bit on how C++ affects the programming model? Isn't CUDA just a variant of C? I presume it is not the goal to run standard C++? Also as I understand it PTX is an IR so not sure why C/C++ can be compared? |
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CUDA is a polyglot programming model for NVidia GPU, with first party support for C, C++, Fortran, and anything else that can target PTX bytecode.
PTX allows for many other languages with toolchains to also target CUDA in some form, with .NET, Java, Haskell, Julia, Python having some kind of NVidia sponsored implementations.
https://developer.nvidia.com/language-solutions
While originally CUDA had its own hardware memory model, NVidia decided to make it follow C++11 memory semantics and went through a decade of hardware redesign to make it possible.
- CppCon 2017: Olivier Giroux "Designing (New) C++ Hardware”
https://www.youtube.com/watch?v=86seb-iZCnI
- The CUDA C++ Standard Library
https://www.youtube.com/watch?v=g78qaeBrPl8
It is also driving many of the use cases in parallel programming for C++
- Future of Standard and CUDA C++
https://www.youtube.com/watch?v=wtsnoUDFmWw
You will only find brief mentions of C here,
https://developer.nvidia.com/hpc-compilers
This is why OpenCL kind of lost the race, with it focused too much in its C dialect, only going polyglot when it was too late for the research community to care.