Emit VMLA for multiply-add on ARM

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 7615134ec08af7473a2851d7db3b7c9603218d4b..7a06867c19189762f89aa4f93a8b4f62f8167454 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -1297,6 +1297,18 @@ void LCodeGen::DoDivI(LDivI* instr) {
 }
 
 
+void LCodeGen::DoMultiplyAddD(LMultiplyAddD* instr) {
+  DwVfpRegister a = ToDoubleRegister(instr->a());
+  DwVfpRegister b = ToDoubleRegister(instr->b());
+  DwVfpRegister c = ToDoubleRegister(instr->c());
+
+  // This is computed in-place.
+  ASSERT(c.is(ToDoubleRegister(instr->result())));
+
+  __ vmla(c, a, b);
+}
+
+
 void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
   const Register result = ToRegister(instr->result());
   const Register left = ToRegister(instr->left());