This revision was automatically updated to reflect the committed changes.
Closed by commit rC359517: Add __builtin_dcbf support for PPC (authored by
saghir, committed by ).
Herald added subscribers: cfe-commits, kristina.
Herald added a project: clang.
Changed prior to commit:
https://reviews.llvm.org/D59843?vs=195094&id=197218#toc
Repository:
rC Clang
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D59843/new/
https://reviews.llvm.org/D59843
Files:
docs/LanguageExtensions.rst
include/clang/Basic/BuiltinsPPC.def
test/CodeGen/builtins-ppc-cache.c
Index: include/clang/Basic/BuiltinsPPC.def
===================================================================
--- include/clang/Basic/BuiltinsPPC.def
+++ include/clang/Basic/BuiltinsPPC.def
@@ -478,6 +478,9 @@
// Set the floating point rounding mode
BUILTIN(__builtin_setrnd, "di", "")
+// Cache built-ins
+BUILTIN(__builtin_dcbf, "vvC*", "")
+
// FIXME: Obviously incomplete.
#undef BUILTIN
Index: test/CodeGen/builtins-ppc-cache.c
===================================================================
--- test/CodeGen/builtins-ppc-cache.c
+++ test/CodeGen/builtins-ppc-cache.c
@@ -0,0 +1,47 @@
+// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu -emit-llvm \
+// RUN: -o - %s | FileCheck %s
+
+int A;
+int B[5];
+float C;
+float D[5];
+double E;
+double F[5];
+
+void func(int a, int b[], float c, float d[], double e, double f[]) {
+ __builtin_dcbf (&a);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&A);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&b[2]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&B[2]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&c);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&C);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&d[2]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&D[2]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&e);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&E);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&f[0]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+
+ __builtin_dcbf (&F[0]);
+ // CHECK: @llvm.ppc.dcbf(i8*
+}
Index: docs/LanguageExtensions.rst
===================================================================
--- docs/LanguageExtensions.rst
+++ 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
==============================
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