Implement SHL_PARTS and SRL_PARTS

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23072 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 5e170de8da..9bbbc16cda 100644
--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -1184,6 +1184,44 @@ SDOperand PPC32DAGToDAGISel::Select(SDOperand Op) {
     CurDAG->ReplaceAllUsesWith(N, Result);
     return Result[Op.ResNo];
   }
+  case ISD::SHL_PARTS: {
+    SDOperand HI = Select(N->getOperand(0));
+    SDOperand LO = Select(N->getOperand(1));
+    SDOperand SH = Select(N->getOperand(2));
+    SDOperand SH_LO_R = CurDAG->getTargetNode(PPC::SUBFIC, MVT::i32, SH,
+                                              getI32Imm(32));
+    SDOperand SH_LO_L = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, SH, 
+                                          getI32Imm((unsigned)-32));
+    SDOperand HI_SHL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, HI, SH);
+    SDOperand HI_LOR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, LO, SH_LO_R);
+    SDOperand HI_LOL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, LO, SH_LO_L);
+    SDOperand HI_OR =  CurDAG->getTargetNode(PPC::OR, MVT::i32, HI_SHL, HI_LOR);
+
+    std::vector<SDOperand> Result;
+    Result.push_back(CurDAG->getTargetNode(PPC::SLW, MVT::i32, LO, SH));
+    Result.push_back(CurDAG->getTargetNode(PPC::OR, MVT::i32, HI_OR, HI_LOL));
+    CurDAG->ReplaceAllUsesWith(N, Result);
+    return Result[Op.ResNo];
+  }
+  case ISD::SRL_PARTS: {
+    SDOperand HI = Select(N->getOperand(0));
+    SDOperand LO = Select(N->getOperand(1));
+    SDOperand SH = Select(N->getOperand(2));
+    SDOperand SH_HI_L = CurDAG->getTargetNode(PPC::SUBFIC, MVT::i32, SH,
+                                              getI32Imm(32));
+    SDOperand SH_HI_R = CurDAG->getTargetNode(PPC::ADDI, MVT::i32, SH, 
+                                              getI32Imm((unsigned)-32));
+    SDOperand LO_SHR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, LO, SH);
+    SDOperand LO_HIL = CurDAG->getTargetNode(PPC::SLW, MVT::i32, HI, SH_HI_L);
+    SDOperand LO_HIR = CurDAG->getTargetNode(PPC::SRW, MVT::i32, HI, SH_HI_R);
+    SDOperand LO_OR =  CurDAG->getTargetNode(PPC::OR, MVT::i32, LO_SHR, LO_HIL);
+
+    std::vector<SDOperand> Result;
+    Result.push_back(CurDAG->getTargetNode(PPC::OR, MVT::i32, LO_OR, LO_HIR));
+    Result.push_back(CurDAG->getTargetNode(PPC::SRW, MVT::i32, HI, SH));
+    CurDAG->ReplaceAllUsesWith(N, Result);
+    return Result[Op.ResNo];
+  }
     
   case ISD::LOAD:
   case ISD::EXTLOAD: