[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

src/compiler/arm/code-generator-arm.cc

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index f47eafebf51a1cc84ae9fa5cf29079330c99b3ac..7f761640b21de4ed8ffd590f1e5001a34c150441 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -617,6 +617,27 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArmVmovLowU32F64:
+      __ VmovLow(i.OutputRegister(), i.InputFloat64Register(0));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    case kArmVmovLowF64U32:
+      __ VmovLow(i.OutputFloat64Register(), i.InputRegister(1));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    case kArmVmovHighU32F64:
+      __ VmovHigh(i.OutputRegister(), i.InputFloat64Register(0));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    case kArmVmovHighF64U32:
+      __ VmovHigh(i.OutputFloat64Register(), i.InputRegister(1));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    case kArmVmovF64U32U32:
+      __ vmov(i.OutputFloat64Register(), i.InputRegister(0),
+              i.InputRegister(1));
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
     case kArmLdrb:
       __ ldrb(i.OutputRegister(), i.InputOffset());
       DCHECK_EQ(LeaveCC, i.OutputSBit());