Clang supports OpenCL, HIP and OpenMP on AMD GPU targets.
| 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 (deprecated). |
__AMDGCN_WAVEFRONT_SIZE | Alias to __AMDGCN_WAVEFRONT_SIZE__ (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.
