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| author | Yaxun Liu <Yaxun.Liu@amd.com> | 2017-08-04 18:16:31 +0000 |
|---|---|---|
| committer | Yaxun Liu <Yaxun.Liu@amd.com> | 2017-08-04 18:16:31 +0000 |
| commit | 39195062c20c5fd7d01678ff87c9c2851644a669 (patch) | |
| tree | 91440b8bb2b2bd18fe5a3fa684ae01cca7179ce8 /clang/docs/LanguageExtensions.rst | |
| parent | 0afcef27a12db3730941b257d9535f7e32479fdb (diff) | |
| download | bcm5719-llvm-39195062c20c5fd7d01678ff87c9c2851644a669.tar.gz bcm5719-llvm-39195062c20c5fd7d01678ff87c9c2851644a669.zip | |
Add OpenCL 2.0 atomic builtin functions as Clang builtin
OpenCL 2.0 atomic builtin functions have a scope argument which is ideally
represented as synchronization scope argument in LLVM atomic instructions.
Clang supports translating Clang atomic builtin functions to LLVM atomic
instructions. However it currently does not support synchronization scope
of LLVM atomic instructions. Without this, users have to use LLVM assembly
code to implement OpenCL atomic builtin functions.
This patch adds OpenCL 2.0 atomic builtin functions as Clang builtin
functions, which supports generating LLVM atomic instructions with
synchronization scope operand.
Currently only constant memory scope argument is supported. Support of
non-constant memory scope argument will be added later.
Differential Revision: https://reviews.llvm.org/D28691
llvm-svn: 310082
Diffstat (limited to 'clang/docs/LanguageExtensions.rst')
| -rw-r--r-- | clang/docs/LanguageExtensions.rst | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/clang/docs/LanguageExtensions.rst b/clang/docs/LanguageExtensions.rst index 78f987c4a8e..652145f66fc 100644 --- a/clang/docs/LanguageExtensions.rst +++ b/clang/docs/LanguageExtensions.rst @@ -1929,7 +1929,13 @@ provided, with values corresponding to the enumerators of C11's ``memory_order`` enumeration. (Note that Clang additionally provides GCC-compatible ``__atomic_*`` -builtins) +builtins and OpenCL 2.0 ``__opencl_atomic_*`` builtins. The OpenCL 2.0 +atomic builtins are an explicit form of the corresponding OpenCL 2.0 +builtin function, and are named with a ``__opencl_`` prefix. The macros +``__OPENCL_MEMORY_SCOPE_WORK_ITEM``, ``__OPENCL_MEMORY_SCOPE_WORK_GROUP``, +``__OPENCL_MEMORY_SCOPE_DEVICE``, ``__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES``, +and ``__OPENCL_MEMORY_SCOPE_SUB_GROUP`` are provided, with values +corresponding to the enumerators of OpenCL's ``memory_scope`` enumeration.) Low-level ARM exclusive memory builtins --------------------------------------- |
