Fixed problem with test on big-endian-float ARM.

test/cctest/test-api.cc

 // Copyright 2007-2009 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 8480 matching lines @@
   v8::HeapStatistics heap_statistics;
   CHECK_EQ(heap_statistics.total_heap_size(), 0);
   CHECK_EQ(heap_statistics.used_heap_size(), 0);
   v8::V8::GetHeapStatistics(&heap_statistics);
   CHECK_NE(heap_statistics.total_heap_size(), 0);
   CHECK_NE(heap_statistics.used_heap_size(), 0);
 }
 
 
 static double DoubleFromBits(uint64_t value) {
+  const int kIntSize = 4;
   double target;
+#ifdef BIG_ENDIAN_FLOATING_POINT
+  // Somebody swapped the lower and higher half of doubles.
+  memcpy(&target, reinterpret_cast<char*>(&value) + kIntSize, kIntSize);
+  memcpy(reinterpret_cast<char*>(&target) + kIntSize, &value, kIntSize);
+#else
   memcpy(&target, &value, sizeof(target));
+#endif
   return target;
 }
 
 
 static uint64_t DoubleToBits(double value) {
+  const int kIntSize = 4;
   uint64_t target;
+#ifdef BIG_ENDIAN_FLOATING_POINT
+  // Somebody swapped the lower and higher half of doubles.
+  memcpy(&target, reinterpret_cast<char*>(&value) + kIntSize, kIntSize);
+  memcpy(reinterpret_cast<char*>(&target) + kIntSize, &value, kIntSize);
+#else
   memcpy(&target, &value, sizeof(target));
+#endif
   return target;
 }
 
 
 static double DoubleToDateTime(double input) {
   double date_limit = 864e13;
   if (IsNaN(input) || input < -date_limit || input > date_limit) {
     return i::OS::nan_value();
   }
   return (input < 0) ? -(floor(-input)) : floor(input);
@@ skipping 69 matching lines @@
     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).
       CHECK_EQ(0xfff, (stored_bits >> 51) & 0xfff);
     }
   }
 }