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| ============== |
| AMDGPU Support |
| ============== |
| |
| Clang supports OpenCL, HIP and OpenMP on AMD GPU targets. |
| |
| |
| Predefined Macros |
| ================= |
| |
| |
| .. list-table:: |
| :header-rows: 1 |
| |
| * - Macro |
| - Description |
| * - ``__AMDGPU__`` |
| - Indicates that the code is being compiled for an AMD GPU. |
| * - ``__AMDGCN__`` |
| - Defined if the GPU target is AMDGCN. |
| * - ``__R600__`` |
| - Defined if the GPU target is R600. |
| * - ``__<ArchName>__`` |
| - Defined with the name of the architecture (e.g., ``__gfx906__`` for the gfx906 architecture). |
| * - ``__<GFXN>__`` |
| - Defines the GFX family (e.g., for gfx906, this macro would be ``__GFX9__``). |
| * - ``__amdgcn_processor__`` |
| - Defined with the processor name as a string (e.g., ``"gfx906"``). |
| * - ``__amdgcn_target_id__`` |
| - Defined with the target ID as a string. |
| * - ``__amdgcn_feature_<feature-name>__`` |
| - Defined for each supported target feature. The value is 1 if the feature is enabled and 0 if it is disabled. Allowed feature names are sramecc and xnack. |
| * - ``__AMDGCN_CUMODE__`` |
| - Defined as 1 if the CU mode is enabled and 0 if the WGP mode is enabled. |
| * - ``__AMDGCN_UNSAFE_FP_ATOMICS__`` |
| - Defined if unsafe floating-point atomics are allowed. |
| * - ``__AMDGCN_WAVEFRONT_SIZE__`` |
| - Defines the wavefront size. Allowed values are 32 and 64. |
| * - ``__AMDGCN_WAVEFRONT_SIZE`` |
| - Alias to ``__AMDGCN_WAVEFRONT_SIZE__``. To be deprecated. |
| * - ``__HAS_FMAF__`` |
| - Defined if FMAF instruction is available (deprecated). |
| * - ``__HAS_LDEXPF__`` |
| - Defined if LDEXPF instruction is available (deprecated). |
| * - ``__HAS_FP64__`` |
| - Defined if FP64 instruction is available (deprecated). |
| |
| Please note that the specific architecture and feature names will vary depending on the GPU. Also, some macros are deprecated and may be removed in future releases. |
