diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index 1b12bd9..44a5470 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -159,6 +159,7 @@
     case MachineRepresentation::kWord64:
       opcode = kMips64Ld;
       break;
+    case MachineRepresentation::kSimd128:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -241,6 +242,7 @@
       case MachineRepresentation::kWord64:
         opcode = kMips64Sd;
         break;
+      case MachineRepresentation::kSimd128:  // Fall through.
       case MachineRepresentation::kNone:
         UNREACHABLE();
         return;
@@ -562,16 +564,36 @@
 }
 
 
-void InstructionSelector::VisitWord32Ctz(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32ReverseBits(Node* node) { UNREACHABLE(); }
 
 
-void InstructionSelector::VisitWord64Ctz(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord64ReverseBits(Node* node) { UNREACHABLE(); }
 
 
-void InstructionSelector::VisitWord32Popcnt(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord32Ctz(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Ctz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
 
 
-void InstructionSelector::VisitWord64Popcnt(Node* node) { UNREACHABLE(); }
+void InstructionSelector::VisitWord64Ctz(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Dctz, g.DefineAsRegister(node), g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitWord32Popcnt(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Popcnt, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
+
+void InstructionSelector::VisitWord64Popcnt(Node* node) {
+  Mips64OperandGenerator g(this);
+  Emit(kMips64Dpopcnt, g.DefineAsRegister(node),
+       g.UseRegister(node->InputAt(0)));
+}
 
 
 void InstructionSelector::VisitWord64Ror(Node* node) {
@@ -802,6 +824,16 @@
 }
 
 
+void InstructionSelector::VisitRoundInt32ToFloat32(Node* node) {
+  VisitRR(this, kMips64CvtSW, node);
+}
+
+
+void InstructionSelector::VisitRoundUint32ToFloat32(Node* node) {
+  VisitRR(this, kMips64CvtSUw, node);
+}
+
+
 void InstructionSelector::VisitChangeInt32ToFloat64(Node* node) {
   VisitRR(this, kMips64CvtDW, node);
 }
@@ -812,6 +844,16 @@
 }
 
 
+void InstructionSelector::VisitTruncateFloat32ToInt32(Node* node) {
+  VisitRR(this, kMips64TruncWS, node);
+}
+
+
+void InstructionSelector::VisitTruncateFloat32ToUint32(Node* node) {
+  VisitRR(this, kMips64TruncUwS, node);
+}
+
+
 void InstructionSelector::VisitChangeFloat64ToInt32(Node* node) {
   Mips64OperandGenerator g(this);
   Node* value = node->InputAt(0);
@@ -1307,6 +1349,7 @@
       break;
     case MachineRepresentation::kBit:
     case MachineRepresentation::kTagged:
+    case MachineRepresentation::kSimd128:
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -1356,6 +1399,7 @@
       break;
     case MachineRepresentation::kBit:
     case MachineRepresentation::kTagged:
+    case MachineRepresentation::kSimd128:
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -1846,7 +1890,11 @@
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
-  return MachineOperatorBuilder::kWord32ShiftIsSafe |
+  return MachineOperatorBuilder::kWord32Ctz |
+         MachineOperatorBuilder::kWord64Ctz |
+         MachineOperatorBuilder::kWord32Popcnt |
+         MachineOperatorBuilder::kWord64Popcnt |
+         MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kInt32DivIsSafe |
          MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kFloat64Min |