MIPS: Add big-endian support for MIPS.

src/conversions-inl.h

 // 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 57 matching lines @@
   // least significant non-fractional bits in the low 32 bits of the
   // double, and reading them from there.
   const double k2Pow52 = 4503599627370496.0;
   bool negative = x < 0;
   if (negative) {
     x = -x;
   }
   if (x < k2Pow52) {
     x += k2Pow52;
     uint32_t result;
+#ifndef V8_TARGET_BIG_ENDIAN
     Address mantissa_ptr = reinterpret_cast<Address>(&x);
+#else
+    Address mantissa_ptr = reinterpret_cast<Address>(&x) + kIntSize;
+#endif
     // Copy least significant 32 bits of mantissa.
     OS::MemCopy(&result, mantissa_ptr, sizeof(result));
     return negative ? ~result + 1 : result;
   }
   // Large number (outside uint32 range), Infinity or NaN.
   return 0x80000000u;  // Return integer indefinite.
 }
 
 
 inline double DoubleToInteger(double x) {
@@ skipping 606 matching lines @@
   SLOW_ASSERT(buffer_pos < kBufferSize);
   buffer[buffer_pos] = '\0';
 
   double converted = Strtod(Vector<const char>(buffer, buffer_pos), exponent);
   return (sign == NEGATIVE) ? -converted : converted;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONVERSIONS_INL_H_