Basic support for OpenCL (experimental)

Basic support for OpenCL

Problem: OpenCL cannot import stdint.h. Temporary fix: define custom opencl_stdint.h (defines currently only int64_t `)

TODO:

• implement opencl_stdint.h
• implement shard_mem, textures, built-in functions
• avoid CUDA intrinsics (fast_div)

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• b851c12c - Lint

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added 3 commits

• abd0abd3 - Lint
• d61ebbd2 - Add extra `pyopencl` to README.rst/setup.py
• 6ff846a9 - Skip opencljit test if pyopencl is not installed

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changed title from Opencl backend to Basic support for OpenCL (experimental)

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• cf890393 - Print str in CBackend as str

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• 7571414f - Add OpenCL test for variable size arrays

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• 81cc1cd1 - Avoid CUDA intrinsics in OpenCL / Mark some methods as not implemented

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• 7dcaa8ff - Typedef most frequent types in opencl_stdint.h

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changed the description

changed the description

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• de1e2eb0 - Fixup: also accept non-array parameters for OpenCL jit arguments

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• 4c3b1c82 - Clarify opencljit.make_python_function docstring

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• c550fde4 - Check pyopencl.{CommandQueue,Context} in opencljit

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added 1 commit

• ccc0caa1 - Add clarifying comment ot opencljit (change of kernel name)

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added 27 commits

• ccc0caa1...69f779ea - 13 commits from branch pycodegen:master
• 0b27d3c3 - Add OpenCLBackend
• c07ccb36 - Finish implementation OpenClBackend,OpenClSympyPrinter
• b93d6992 - Implement opencljit
• e40ca9a1 - Lint
• 6767b4a0 - Add extra `pyopencl` to README.rst/setup.py
• 3814a508 - Skip opencljit test if pyopencl is not installed
• c4096908 - Print str in CBackend as str
• 38463a9b - Add OpenCL test for variable size arrays
• abfa7d64 - Avoid CUDA intrinsics in OpenCL / Mark some methods as not implemented
• b03c498d - Typedef most frequent types in opencl_stdint.h
• c21436bc - Fixup: also accept non-array parameters for OpenCL jit arguments
• 2854ab63 - Clarify opencljit.make_python_function docstring
• fafa5794 - Check pyopencl.{CommandQueue,Context} in opencljit
• bc556567 - Add clarifying comment ot opencljit (change of kernel name)

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added 1 commit

• 967d99ee - Implement fast approximations for OpenCL: fast_division, fast_inv_sqrt, fast_sqrt

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added 1 commit

• fedb1d72 - Add opencl1.1_known_functions.txt

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