Author: saghir Date: Mon Apr 29 16:25:33 2019 New Revision: 359517 URL: http://llvm.org/viewvc/llvm-project?rev=359517&view=rev Log: 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 Added: cfe/trunk/test/CodeGen/builtins-ppc-cache.c Modified: cfe/trunk/docs/LanguageExtensions.rst cfe/trunk/include/clang/Basic/BuiltinsPPC.def Modified: cfe/trunk/docs/LanguageExtensions.rst URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/LanguageExtensions.rst?rev=359517&r1=359516&r2=359517&view=diff ============================================================================== --- cfe/trunk/docs/LanguageExtensions.rst (original) +++ cfe/trunk/docs/LanguageExtensions.rst Mon Apr 29 16:25:33 2019 @@ -2448,6 +2448,31 @@ Note that the mode argument will modulo 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 ============================== Modified: cfe/trunk/include/clang/Basic/BuiltinsPPC.def URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsPPC.def?rev=359517&r1=359516&r2=359517&view=diff ============================================================================== --- cfe/trunk/include/clang/Basic/BuiltinsPPC.def (original) +++ cfe/trunk/include/clang/Basic/BuiltinsPPC.def Mon Apr 29 16:25:33 2019 @@ -478,6 +478,9 @@ BUILTIN(__builtin_pack_vector_int128, "V // Set the floating point rounding mode BUILTIN(__builtin_setrnd, "di", "") +// Cache built-ins +BUILTIN(__builtin_dcbf, "vvC*", "") + // FIXME: Obviously incomplete. #undef BUILTIN Added: cfe/trunk/test/CodeGen/builtins-ppc-cache.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins-ppc-cache.c?rev=359517&view=auto ============================================================================== --- cfe/trunk/test/CodeGen/builtins-ppc-cache.c (added) +++ cfe/trunk/test/CodeGen/builtins-ppc-cache.c Mon Apr 29 16:25:33 2019 @@ -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* +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
