Add __builtin_dcbf support for PPC
Summary:
This patch adds support for __builtin_dcbf for PPC.
__builtin_dcbf copies the contents of a modified block from the data cache
to main memory and flushes the copy from the data cache.
Differential revision: https://reviews.llvm.org/D59843
llvm-svn: 359517
diff --git a/clang/docs/LanguageExtensions.rst b/clang/docs/LanguageExtensions.rst
index 0299dde..7772bf5 100644
--- a/clang/docs/LanguageExtensions.rst
+++ b/clang/docs/LanguageExtensions.rst
@@ -2448,6 +2448,31 @@
than 3, it will only use the least significant two bits of the mode.
Namely, ``__builtin_setrnd(102))`` is equal to ``__builtin_setrnd(2)``.
+PowerPC cache builtins
+^^^^^^^^^^^^^^^^^^^^^^
+
+The PowerPC architecture specifies instructions implementing cache operations.
+Clang provides builtins that give direct programmer access to these cache
+instructions.
+
+Currently the following builtins are implemented in clang:
+
+``__builtin_dcbf`` copies the contents of a modified block from the data cache
+to main memory and flushes the copy from the data cache.
+
+**Syntax**:
+
+.. code-block:: c
+
+ void __dcbf(const void* addr); /* Data Cache Block Flush */
+
+**Example of Use**:
+
+.. code-block:: c
+
+ int a = 1;
+ __builtin_dcbf (&a);
+
Extensions for Static Analysis
==============================