Implementation of STBCX

llvm · Jul 14, 2021 · 09df619 · 09df619
1 parent 8a0f116
commit 09df619
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diff --git a/clang/include/clang/Basic/BuiltinsPPC.def b/clang/include/clang/Basic/BuiltinsPPC.def
@@ -58,6 +58,7 @@ BUILTIN(__builtin_ppc_fetch_and_swaplp, "ULiULiD*ULi", "")
 BUILTIN(__builtin_ppc_ldarx, "LiLiD*", "")
 BUILTIN(__builtin_ppc_lwarx, "iiD*", "")
 BUILTIN(__builtin_ppc_stdcx, "iLiD*Li", "")
+BUILTIN(__builtin_ppc_stbcx, "icD*c", "")
 BUILTIN(__builtin_ppc_stwcx, "iiD*i", "")
 BUILTIN(__builtin_ppc_tdw, "vLLiLLiIUi", "")
 BUILTIN(__builtin_ppc_tw, "viiIUi", "")

diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
@@ -118,6 +118,7 @@ static void defineXLCompatMacros(MacroBuilder &Builder) {
   Builder.defineMacro("__lwarx", "__builtin_ppc_lwarx");
   Builder.defineMacro("__stdcx", "__builtin_ppc_stdcx");
   Builder.defineMacro("__stwcx", "__builtin_ppc_stwcx");
+  Builder.defineMacro("__stbcx", "__builtin_ppc_stbcx");
   Builder.defineMacro("__tdw", "__builtin_ppc_tdw");
   Builder.defineMacro("__tw", "__builtin_ppc_tw");
   Builder.defineMacro("__trap", "__builtin_ppc_trap");

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -15575,6 +15575,21 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
   case PPC::BI__builtin_ppc_ldarx:
   case PPC::BI__builtin_ppc_lwarx:
     return emitPPCLoadReserveIntrinsic(*this, BuiltinID, E);
+  case PPC::BI__builtin_ppc_stbcx: {
+    llvm::Function *F = CGM.getIntrinsic(Intrinsic::ppc_stbcx);
+    Ops[0] = Builder.CreateBitCast(Ops[0], Int8PtrTy);
+    auto Signed = getIntegerWidthAndSignedness(CGM.getContext(),
+                 E->getArg(1)->getType()).Signed;
+
+    if (Signed) {
+      dbgs() << "SIGNED\n";
+      Ops[1] = Builder.CreateSExt(Ops[1], Int32Ty);
+    } else {
+      dbgs() << "UNSIGNED\n";
+      Ops[1] = Builder.CreateZExt(Ops[1], Int32Ty);
+    }
+    return Builder.CreateCall(F, Ops);
+  }
   }
 }
 

diff --git a/llvm/include/llvm/IR/IntrinsicsPowerPC.td b/llvm/include/llvm/IR/IntrinsicsPowerPC.td
@@ -1565,6 +1565,7 @@ let TargetPrefix = "ppc" in {
   def int_ppc_stwcx : GCCBuiltin<"__builtin_ppc_stwcx">,
                       Intrinsic<[llvm_i32_ty], [llvm_ptr_ty, llvm_i32_ty],
                                 [IntrWriteMem]>;
+  def int_ppc_stbcx : Intrinsic<[llvm_i32_ty], [llvm_ptr_ty, llvm_i32_ty], [IntrWriteMem]>;
   // compare
   def int_ppc_cmpeqb
       : GCCBuiltin<"__builtin_ppc_cmpeqb">,

diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -5445,3 +5445,5 @@ def : Pat<(int_ppc_fctudz f64:$A),
         (XSCVDPUXDS $A)>;
 def : Pat<(int_ppc_fctuwz f64:$A),
         (XSCVDPUXWS $A)>;
+def : Pat<(int_ppc_stbcx xoaddr:$dst, gprc:$A),
+          (STBCX gprc:$A, xoaddr:$dst)>;