[PATCH] D154133: [amdgpu] start documenting amdgpu support by clang

[Siu Chi Chan via Phabricator via cfe-commits]

scchan added inline comments.


================
Comment at: clang/docs/AMDGPUSupport.rst:47
+   * - ``__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__``
----------------
This set of feature macros is tricky.  A feature macro is defined only when the corresponding target feature has been explicitly specified during compilation; otherwise it's undefined.  Users will have to refer to the target feature table to get the semantic of each state.  For example, for xnack, undefined=="any", 1 for xnack+, 0 for xnack-.

Is there a reason we don't support features other than sramecc and xnack?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D154133/new/

https://reviews.llvm.org/D154133