S390: [es6] Faster implementation of OrdinaryHasInstance.

Port b6419fa2

Original commit message:
    Now implemented as a builtin that delegates to the InstanceOfStub. That
    stub was parameterized to fallback to either Runtime_InstanceOf or to
    Runtime_OrdinaryHasInstance depending on the --harmony-instanceof flag.
    Once the feature stabilizes and the flag is no longer needed, we can get
    rid of this parameterization again.

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:4447
LOG=n

Review URL: https://codereview.chromium.org/1827583002

Cr-Commit-Position: refs/heads/master@{#35025}

src/s390/builtins-s390.cc

@@ -1456,6 +1456,28 @@ void Builtins::Generate_DatePrototype_GetField(MacroAssembler* masm,
   __ TailCallRuntime(Runtime::kThrowNotDateError);
 }
 
+// static
+void Builtins::Generate_FunctionHasInstance(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- r2    : argc
+  //  -- sp[0] : first argument (left-hand side)
+  //  -- sp[4] : receiver (right-hand side)
+  // -----------------------------------
+
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ LoadP(InstanceOfDescriptor::LeftRegister(),
+             MemOperand(fp, 2 * kPointerSize));  // Load left-hand side.
+    __ LoadP(InstanceOfDescriptor::RightRegister(),
+             MemOperand(fp, 3 * kPointerSize));  // Load right-hand side.
+    InstanceOfStub stub(masm->isolate(), true);
+    __ CallStub(&stub);
+  }
+
+  // Pop the argument and the receiver.
+  __ Ret(2);
+}
+
 // static
 void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
   // ----------- S t a t e -------------

src/s390/code-stubs-s390.cc

@@ -1487,7 +1487,8 @@ void InstanceOfStub::Generate(MacroAssembler* masm) {
   // Slow-case: Call the %InstanceOf runtime function.
   __ bind(&slow_case);
   __ Push(object, function);
-  __ TailCallRuntime(Runtime::kInstanceOf);
+  __ TailCallRuntime(is_es6_instanceof() ? Runtime::kOrdinaryHasInstance
+                                         : Runtime::kInstanceOf);
 }
 
 void FunctionPrototypeStub::Generate(MacroAssembler* masm) {