MIPS: [turbofan] Implement Word32Ctz, Word64Ctz, Word32Popcnt and Word64Popcnt

src/compiler/mips/instruction-selector-mips.cc

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 61cea76b22cc5c9a4f8a9c9f9250a3bfa7f80478..d400de9ec6bd59db50333eac1bea689bfa19ff47 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -401,10 +401,16 @@ void InstructionSelector::VisitWord32Clz(Node* node) {
 }
 
 
-void InstructionSelector::VisitWord32Ctz(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32Ctz(Node* node) {
+  MipsOperandGenerator g(this);
+  Emit(kMipsCtz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
 
 
-void InstructionSelector::VisitWord32Popcnt(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32Popcnt(Node* node) {
+  MipsOperandGenerator g(this);
+  Emit(kMipsPopcnt, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
 
 
 void InstructionSelector::VisitInt32Add(Node* node) {
@@ -1318,7 +1324,9 @@ InstructionSelector::SupportedMachineOperatorFlags() {
              MachineOperatorBuilder::kFloat64RoundTruncate |
              MachineOperatorBuilder::kFloat64RoundTiesEven;
   }
-  return flags | MachineOperatorBuilder::kInt32DivIsSafe |
+  return flags | MachineOperatorBuilder::kWord32Ctz |
+         MachineOperatorBuilder::kWord32Popcnt |
+         MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kFloat64Min |