Emit VMLA for multiply-add on ARM

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index c6004e51b715d25b48dd0dbc0152ff0d66d8d4ae..98801f9571bdd1b8de54a112521e669d32ad3699 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1281,6 +1281,20 @@ LInstruction* LChunkBuilder::DoMul(HMul* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoMultiplyAddD(HMultiplyAddD* instr) {
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->a()->representation().IsDouble());
+  ASSERT(instr->b()->representation().IsDouble());
+  ASSERT(instr->c()->representation().IsDouble());
+
+  LOperand* a = UseRegisterAtStart(instr->a());
+  LOperand* b = UseRegisterAtStart(instr->b());
+  LOperand* c = UseRegisterAtStart(instr->c());
+  LMultiplyAddD* result = new(zone()) LMultiplyAddD(a, b, c);
+  return DefineSameAsFirst(result);
+}
+
+
 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());