[runtime] Replace the EQUALS builtin with proper Object::Equals.

src/runtime/runtime-numbers.cc

 // Copyright 2014 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 
 
 #ifndef _STLP_VENDOR_CSTD
-// STLPort doesn't import fpclassify and isless into the std namespace.
-using std::fpclassify;
+// STLPort doesn't import isless into the std namespace.
 using std::isless;
 #endif
 
 namespace v8 {
 namespace internal {
 
 RUNTIME_FUNCTION(Runtime_NumberToRadixString) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_SMI_ARG_CHECKED(radix, 1);
@@ skipping 200 matching lines @@
 
   // We rely on implementation-defined behavior below, but at least not on
   // undefined behavior.
   CONVERT_NUMBER_CHECKED(uint32_t, x, Int32, args[0]);
   CONVERT_NUMBER_CHECKED(uint32_t, y, Int32, args[1]);
   int32_t product = static_cast<int32_t>(x * y);
   return *isolate->factory()->NewNumberFromInt(product);
 }
 
 
-RUNTIME_FUNCTION(Runtime_NumberEquals) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 2);
-
-  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
-  CONVERT_DOUBLE_ARG_CHECKED(y, 1);
-  if (std::isnan(x)) return Smi::FromInt(NOT_EQUAL);
-  if (std::isnan(y)) return Smi::FromInt(NOT_EQUAL);
-  if (x == y) return Smi::FromInt(EQUAL);
-  Object* result;
-  if ((fpclassify(x) == FP_ZERO) && (fpclassify(y) == FP_ZERO)) {
-    result = Smi::FromInt(EQUAL);
-  } else {
-    result = Smi::FromInt(NOT_EQUAL);
-  }
-  return result;
-}
-
-
 RUNTIME_FUNCTION(Runtime_NumberCompare) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 3);
 
   CONVERT_DOUBLE_ARG_CHECKED(x, 0);
   CONVERT_DOUBLE_ARG_CHECKED(y, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, uncomparable_result, 2)
   if (std::isnan(x) || std::isnan(y)) return *uncomparable_result;
   if (x == y) return Smi::FromInt(EQUAL);
   if (isless(x, y)) return Smi::FromInt(LESS);
@@ skipping 90 matching lines @@
   CONVERT_ARG_CHECKED(Object, obj, 0);
   return isolate->heap()->ToBoolean(obj->IsSmi());
 }
 
 
 RUNTIME_FUNCTION(Runtime_GetRootNaN) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 0);
   return isolate->heap()->nan_value();
 }
+
 }  // namespace internal
 }  // namespace v8