AMDGPU Support — Clang 21.0.0git documentation (original) (raw)
Clang supports OpenCL, HIP and OpenMP on AMD GPU targets.
Predefined Macros¶
| 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. |
| ____ | Defined with the name of the architecture (e.g., __gfx906__ for the gfx906 architecture). |
| ____ | 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___ | 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.