ES6: Faster implementation of OrdinaryHasInstance

src/ia32/builtins-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1124 matching lines @@
   __ Jump(masm->isolate()->builtins()->Apply(), RelocInfo::CODE_TARGET);
 
   // 3b. The target is not callable, throw an appropriate TypeError.
   __ bind(&target_not_callable);
   {
     __ mov(Operand(esp, kPointerSize), edi);
     __ TailCallRuntime(Runtime::kThrowApplyNonFunction);
   }
 }
 
+void Builtins::Generate_FunctionHasInstance(MacroAssembler* masm) {
+  // Stack Layout:
+  // esp[0]           : Return address
+  // esp[8]           : Argument n
+  // esp[16]          : Argument n-1
+  //  ...
+  // esp[8 * n]       : Argument 1
+  // esp[8 * (n + 1)] : Receiver (callable to call)
+  //
+  // eax contains the number of arguments, n, not counting the receiver.
+  //
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ push(esi);
+    __ push(edi);
+    __ mov(edx, Operand(ebp, 2 * kPointerSize));  // load arg.
+    __ mov(eax, Operand(ebp, 3 * kPointerSize));  // load receiver.
+    InstanceOfStub stub(masm->isolate(), true);
+    __ CallStub(&stub);
+  }
+
+  // Pop the argument and the receiver.
+  __ ret(2 * kPointerSize);
+}
 
 void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax     : argc
   //  -- esp[0]  : return address
   //  -- esp[4]  : new.target (optional)
   //  -- esp[8]  : argumentsList
   //  -- esp[12] : target
   //  -- esp[16] : receiver
   // -----------------------------------
@@ skipping 1427 matching lines @@
   // And "return" to the OSR entry point of the function.
   __ ret(0);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32