MIPS: Fix the cctest QuietSignalingNaNs for MIPS.

test/cctest/test-api.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13546 matching lines @@
     double test_value = test_values[i];
 
     // Check that Number::New preserves non-NaNs and quiets SNaNs.
     v8::Handle<v8::Value> number = v8::Number::New(test_value);
     double stored_number = number->NumberValue();
     if (!IsNaN(test_value)) {
       CHECK_EQ(test_value, stored_number);
     } else {
       uint64_t stored_bits = DoubleToBits(stored_number);
       // Check if quiet nan (bits 51..62 all set).
+#if defined(V8_TARGET_ARCH_MIPS) && !defined(USE_SIMULATOR)
+      // Most significant fraction bit for quiet nan is set to 0
+      // on MIPS architecture. Allowed by IEEE-754.
+      CHECK_EQ(0xffe, static_cast<int>((stored_bits >> 51) & 0xfff));
+#else
       CHECK_EQ(0xfff, static_cast<int>((stored_bits >> 51) & 0xfff));
+#endif
     }
 
     // Check that Date::New preserves non-NaNs in the date range and
     // quiets SNaNs.
     v8::Handle<v8::Value> date = v8::Date::New(test_value);
     double expected_stored_date = DoubleToDateTime(test_value);
     double stored_date = date->NumberValue();
     if (!IsNaN(expected_stored_date)) {
       CHECK_EQ(expected_stored_date, stored_date);
     } else {
       uint64_t stored_bits = DoubleToBits(stored_date);
       // Check if quiet nan (bits 51..62 all set).
+#if defined(V8_TARGET_ARCH_MIPS) && !defined(USE_SIMULATOR)
+      // Most significant fraction bit for quiet nan is set to 0
+      // on MIPS architecture. Allowed by IEEE-754.
+      CHECK_EQ(0xffe, static_cast<int>((stored_bits >> 51) & 0xfff));
+#else
       CHECK_EQ(0xfff, static_cast<int>((stored_bits >> 51) & 0xfff));
+#endif
     }
   }
 }
 
 
 static v8::Handle<Value> SpaghettiIncident(const v8::Arguments& args) {
   v8::HandleScope scope;
   v8::TryCatch tc;
   v8::Handle<v8::String> str(args[0]->ToString());
   if (tc.HasCaught())
@@ skipping 1898 matching lines @@
   CHECK(i->Equals(CompileRun("'abcbd'.replace(/b/g,func)[3]")));
 
   // TODO(1547): Make the following also return "i".
   // Calling with environment record as base.
   TestReceiver(o, context->Global(), "func()");
   // Calling with no base.
   TestReceiver(o, context->Global(), "(1,func)()");
 
   foreign_context.Dispose();
 }