Anastasia created this revision.
Anastasia added a reviewer: svenvh.
Herald added subscribers: ebevhan, jfb, yaxunl.
Anastasia requested review of this revision.
There were multiple requests from the developers to allow this functionality in
OpenCL
https://github.com/KhronosGroup/OpenCL-Docs/issues/66
and this can be supported already in some tool flows i.e. using SPIRV-LLVM
Translator.
However, there hasn't been enough progress on the core spec side.
Therefore, I suggest documenting this as a clang extension for now.
https://reviews.llvm.org/D101089
Files:
clang/docs/LanguageExtensions.rst
Index: clang/docs/LanguageExtensions.rst
===================================================================
--- clang/docs/LanguageExtensions.rst
+++ clang/docs/LanguageExtensions.rst
@@ -1813,6 +1813,20 @@
#pragma OPENCL EXTENSION __cl_clang_variadic_functions : disable
void bar(int a, ...); // error - variadic prototype is not allowed
+Legacy 1.x atomics with generic address space
+---------------------------------------------
+
+Clang allows use of atomic functions from earlier than OpenCL 2.0
+standard with generic address space pointer in C++ for OpenCL mode.
+
+**Example of Use**:
+
+.. code-block:: c++
+
+ void foo(__generic volatile unsigned int* a) {
+ atomic_add(a, 1);
+ }
+
Builtin Functions
=================
Index: clang/docs/LanguageExtensions.rst
===================================================================
--- clang/docs/LanguageExtensions.rst
+++ clang/docs/LanguageExtensions.rst
@@ -1813,6 +1813,20 @@
#pragma OPENCL EXTENSION __cl_clang_variadic_functions : disable
void bar(int a, ...); // error - variadic prototype is not allowed
+Legacy 1.x atomics with generic address space
+---------------------------------------------
+
+Clang allows use of atomic functions from earlier than OpenCL 2.0
+standard with generic address space pointer in C++ for OpenCL mode.
+
+**Example of Use**:
+
+.. code-block:: c++
+
+ void foo(__generic volatile unsigned int* a) {
+ atomic_add(a, 1);
+ }
+
Builtin Functions
=================
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