Use signaling NaN for holes in fixed double arrays.

src/arm/simulator-arm.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.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
 
@@ skipping 1899 matching lines @@
         // This is not a valid svc code.
         UNREACHABLE();
         break;
       }
     }
   }
 }
 
 
 double Simulator::canonicalizeNaN(double value) {
-  return (FPSCR_default_NaN_mode_ && std::isnan(value)) ?
-    FixedDoubleArray::canonical_not_the_hole_nan_as_double() : value;
+  // Default NaN value, see "NaN handling" in "IEEE 754 standard implementation
+  // choices" of the ARM Reference Manual.
+  const uint64_t kDefaultNaN = V8_UINT64_C(0x7FF8000000000000);
+  if (FPSCR_default_NaN_mode_ && std::isnan(value)) {
+    value = bit_cast<double>(kDefaultNaN);
+  }
+  return value;
 }
 
 
 // Stop helper functions.
 bool Simulator::isStopInstruction(Instruction* instr) {
   return (instr->Bits(27, 24) == 0xF) && (instr->SvcValue() >= kStopCode);
 }
 
 
 bool Simulator::isWatchedStop(uint32_t code) {
@@ skipping 2090 matching lines @@
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 
 } }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM