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| author | Jim Grosbach <grosbach@apple.com> | 2014-06-16 21:55:58 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2014-06-16 21:55:58 +0000 |
| commit | 171ec3454422decfcb0f04bf8ce8ee5fbc9f61ae (patch) | |
| tree | 9e996cb3492b68bfc859bbae718942c4f6f4710b | |
| parent | cc71514d3a88b01726960a22297fd1f8ea508781 (diff) | |
| download | bcm5719-llvm-171ec3454422decfcb0f04bf8ce8ee5fbc9f61ae.tar.gz bcm5719-llvm-171ec3454422decfcb0f04bf8ce8ee5fbc9f61ae.zip | |
ARM: Support for __builtin_arm_rbit() intrinsic.
Reverse the bits in a word. Maps to the RBIT instruction.
rdar://9283021
llvm-svn: 211059
| -rw-r--r-- | clang/include/clang/Basic/BuiltinsARM.def | 3 | ||||
| -rw-r--r-- | clang/lib/CodeGen/CGBuiltin.cpp | 6 | ||||
| -rw-r--r-- | clang/test/CodeGen/builtins-arm.c | 6 |
3 files changed, 15 insertions, 0 deletions
diff --git a/clang/include/clang/Basic/BuiltinsARM.def b/clang/include/clang/Basic/BuiltinsARM.def index 9f650cc4154..00cd2c1de41 100644 --- a/clang/include/clang/Basic/BuiltinsARM.def +++ b/clang/include/clang/Basic/BuiltinsARM.def @@ -24,6 +24,9 @@ BUILTIN(__builtin_arm_qsub, "iii", "nc") BUILTIN(__builtin_arm_ssat, "iiUi", "nc") BUILTIN(__builtin_arm_usat, "UiUiUi", "nc") +// Bit manipulation +BUILTIN(__builtin_arm_rbit, "UiUi", "nc") + // Store and load exclusive BUILTIN(__builtin_arm_ldrexd, "LLUiv*", "") BUILTIN(__builtin_arm_strexd, "iLLUiv*", "") diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp index 47245cf2d83..f4e11509a9d 100644 --- a/clang/lib/CodeGen/CGBuiltin.cpp +++ b/clang/lib/CodeGen/CGBuiltin.cpp @@ -3054,6 +3054,12 @@ Value *CodeGenFunction::EmitARMBuiltinExpr(unsigned BuiltinID, return Builder.CreateCall(F, llvm::ConstantInt::get(Int32Ty, HintID)); } + if (BuiltinID == ARM::BI__builtin_arm_rbit) { + return Builder.CreateCall(CGM.getIntrinsic(Intrinsic::arm_rbit), + EmitScalarExpr(E->getArg(0)), + "rbit"); + } + if (BuiltinID == ARM::BI__clear_cache) { assert(E->getNumArgs() == 2 && "__clear_cache takes 2 arguments"); const FunctionDecl *FD = E->getDirectCallee(); diff --git a/clang/test/CodeGen/builtins-arm.c b/clang/test/CodeGen/builtins-arm.c index c5e487aafd6..13ffc607849 100644 --- a/clang/test/CodeGen/builtins-arm.c +++ b/clang/test/CodeGen/builtins-arm.c @@ -52,3 +52,9 @@ void test_barrier() { __builtin_arm_dmb(1); //CHECK: call {{.*}} @llvm.arm.dmb(i32 1) __builtin_arm_dsb(2); //CHECK: call {{.*}} @llvm.arm.dsb(i32 2) } + +// CHECK: call {{.*}} @llvm.arm.rbit(i32 %a) + +unsigned rbit(unsigned a) { + return __builtin_arm_rbit(a); +} |
