MIPS: Add big-endian support for MIPS.

src/runtime.cc

 // Copyright 2012 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 9166 matching lines @@
 
 static inline ObjectPair MakePair(MaybeObject* x, MaybeObject* y) {
   ObjectPair result = {x, y};
   // Pointers x and y returned in rax and rdx, in AMD-x64-abi.
   // In Win64 they are assigned to a hidden first argument.
   return result;
 }
 #else
 typedef uint64_t ObjectPair;
 static inline ObjectPair MakePair(MaybeObject* x, MaybeObject* y) {
+#if defined(V8_TARGET_LITTLE_ENDIAN)
   return reinterpret_cast<uint32_t>(x) |
       (reinterpret_cast<ObjectPair>(y) << 32);
+#elif defined(V8_TARGET_BIG_ENDIAN)
+    return reinterpret_cast<uint32_t>(y) |
+        (reinterpret_cast<ObjectPair>(x) << 32);
+#else
+#error Unknown endianness
+#endif
 }
 #endif
 
 
 static inline MaybeObject* Unhole(Heap* heap,
                                   MaybeObject* x,
                                   PropertyAttributes attributes) {
   ASSERT(!x->IsTheHole() || (attributes & READ_ONLY) != 0);
   USE(attributes);
   return x->IsTheHole() ? heap->undefined_value() : x;
@@ skipping 5953 matching lines @@
   }
 }
 
 
 void Runtime::OutOfMemory() {
   Heap::FatalProcessOutOfMemory("CALL_AND_RETRY_LAST", true);
   UNREACHABLE();
 }
 
 } }  // namespace v8::internal