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| author | Ahsan Saghir <saghir.ibm@gmail.com> | 2019-04-29 23:25:33 +0000 |
|---|---|---|
| committer | Ahsan Saghir <saghir.ibm@gmail.com> | 2019-04-29 23:25:33 +0000 |
| commit | cde6bbc766130822b7b296d84d9e03cbdd010b95 (patch) | |
| tree | cc908bab3c4842edea46d576df4d4edbd7b50858 | |
| parent | 6eedd8523a8d0f6c4deb0a240408270ce850b59b (diff) | |
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
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@359517 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/LanguageExtensions.rst | 25 | ||||
| -rw-r--r-- | include/clang/Basic/BuiltinsPPC.def | 3 | ||||
| -rw-r--r-- | test/CodeGen/builtins-ppc-cache.c | 47 |
3 files changed, 75 insertions, 0 deletions
diff --git a/docs/LanguageExtensions.rst b/docs/LanguageExtensions.rst index 0299dde887..7772bf53e8 100644 --- a/docs/LanguageExtensions.rst +++ b/docs/LanguageExtensions.rst @@ -2448,6 +2448,31 @@ Note that the mode argument will modulo 4, so if the integer argument is greater 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 ============================== diff --git a/include/clang/Basic/BuiltinsPPC.def b/include/clang/Basic/BuiltinsPPC.def index 9292458462..3b6348ad7d 100644 --- a/include/clang/Basic/BuiltinsPPC.def +++ b/include/clang/Basic/BuiltinsPPC.def @@ -478,6 +478,9 @@ BUILTIN(__builtin_pack_vector_int128, "V1LLLiULLiULLi", "") // Set the floating point rounding mode BUILTIN(__builtin_setrnd, "di", "") +// Cache built-ins +BUILTIN(__builtin_dcbf, "vvC*", "") + // FIXME: Obviously incomplete. #undef BUILTIN diff --git a/test/CodeGen/builtins-ppc-cache.c b/test/CodeGen/builtins-ppc-cache.c new file mode 100644 index 0000000000..81c69e97bd --- /dev/null +++ b/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* +} |