Emit VMLA for multiply-add on ARM

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 5439028904f429da28083e5c324707da256d5a9b..f5d9cc6ece25625bc33958ebd2eb47e33e30e296 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -135,6 +135,7 @@ class LCodeGen;
   V(MathMinMax)                                 \
   V(ModI)                                       \
   V(MulI)                                       \
+  V(MultiplyAddD)                               \
   V(NumberTagD)                                 \
   V(NumberTagI)                                 \
   V(NumberTagU)                                 \
@@ -605,6 +606,23 @@ class LMulI: public LTemplateInstruction<1, 2, 0> {
 };
 
 
+class LMultiplyAddD: public LTemplateInstruction<1, 3, 0> {
+ public:
+  LMultiplyAddD(LOperand* a, LOperand* b, LOperand* c) {
+    inputs_[0] = a;
+    inputs_[1] = b;
+    inputs_[2] = c;
+  }
+
+  LOperand* a() { return inputs_[0]; }
+  LOperand* b() { return inputs_[1]; }
+  LOperand* c() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MultiplyAddD, "multiply-add-d")
+  DECLARE_HYDROGEN_ACCESSOR(MultiplyAddD)
+};
+
+
 class LCmpIDAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpIDAndBranch(LOperand* left, LOperand* right) {