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.. meta::
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:description: This chapter describes the AMD CLR which is the implementation of HIP supporting on the AMD platform.
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:keywords: AMD, ROCm, HIP, CLR, HIPAMD, OpenCL, ROCCLR, CHANGELOG
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.. _AMD_Compute_Language_Runtimes:
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*******************************************************************************
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AMD compute language runtimes (CLR)
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*******************************************************************************
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CLR contains source codes for AMD's compute languages runtimes: ``HIP`` and ``OpenCL™``.
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CLR is the part of HIP runtime which is supported on the AMD ROCm platform, it provides a header and runtime library built on top of HIP-Clang compiler.
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For developers and users, CLR implements HIP runtime APIs including streams, events, and memory APIs, which is a object library that is linked with the application.
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The source codes for all headers and the library implementation are available on GitHub in the `CLR repository <https://github.com/ROCm/clr>`_.
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Project organization
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====================
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CLR includes the following source code,
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* ``hipamd`` - contains implementation of ``HIP`` language on the AMD platform. It is hosted at `clr/hipamd <https://github.com/ROCm/rocm-systems/tree/develop/projects/clr/hipamd>`_.
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* ``opencl`` - contains implementation of `OpenCL™ <https://www.khronos.org/opencl/>`_ on AMD platform. It is hosted at `clr/opencl <https://github.com/ROCm/rocm-systems/tree/develop/projects/clr//opencl>`_.
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* ``rocclr`` - contains ROCm compute runtime used in `HIP` and `OpenCL™`. This is hosted at `clr/rocclr <https://github.com/ROCm/rocm-systems/tree/develop/projects/clr/rocclr>`_.
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How to build/install
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====================
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Prerequisites
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-------------
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Please refer to Quick Start Guide in `ROCm Docs <https://rocm.docs.amd.com/projects/install-on-linux/en/latest/tutorial/quick-start.html>`_.
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Building CLR requires ``rocm-hip-libraries`` meta package, which provides the pre-requisites for CLR.
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Linux
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-----
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* Clone this repository
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.. code-block:: shell
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cd clr && mkdir build && cd build
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* For ``HIP``
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.. code-block:: shell
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cmake .. -DCLR_BUILD_HIP=ON -DHIP_COMMON_DIR=$HIP_COMMON_DIR
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``HIP_COMMON_DIR`` points to `HIP <https://github.com/ROCm/rocm-systems/tree/develop/projects/hip>`_.
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* For ``OpenCL™``
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.. code-block:: shell
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cmake .. -DCLR_BUILD_OCL=ON
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make
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make install
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Users can also build ``OCL`` and ``HIP`` at the same time by passing ``-DCLR_BUILD_HIP=ON -DCLR_BUILD_OCL=ON`` to configure command.
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For detail instructions, please refer to `build HIP <https://rocm.docs.amd.com/projects/HIP/en/latest/install/build.html>`_.
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Test
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-----
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``hip-tests`` is a separate repository hosted at `hip-tests <https://github.com/ROCm/rocm-systems/tree/develop/projects/hip-tests>`_.
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To run ``hip-tests`` please go to the repository and follow the steps.
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Release notes
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-------------
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HIP provides release notes in CLR `change log <https://github.com/ROCm/rocm-systems/blob/develop/projects/clr/CHANGELOG.md>`_, which has records of changes in each release.
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