MIPS: Add big-endian support for MIPS.

src/mips/builtins-mips.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 452 matching lines @@
       // Fill all the in-object properties with appropriate filler.
       // a1: constructor function
       // a2: initial map
       // a3: object size (in words, including memento if create_memento)
       // t4: JSObject (not tagged)
       // t5: First in-object property of JSObject (not tagged)
       ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize);
 
       if (count_constructions) {
         __ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
-        __ lw(a0, FieldMemOperand(a2, Map::kInstanceSizesOffset));
-        __ Ext(a0, a0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte,
-                kBitsPerByte);
+        __ lbu(a0, FieldMemOperand(a2, Map::kPreAllocatedPropertyFieldsOffset));
         __ sll(at, a0, kPointerSizeLog2);
         __ addu(a0, t5, at);
         __ sll(at, a3, kPointerSizeLog2);
         __ Addu(t6, t4, Operand(at));   // End of object.
         // a0: offset of first field after pre-allocated fields
         if (FLAG_debug_code) {
           __ Assert(le, kUnexpectedNumberOfPreAllocatedPropertyFields,
               a0, Operand(t6));
         }
         __ InitializeFieldsWithFiller(t5, a0, t7);
@@ skipping 32 matching lines @@
       __ Addu(t4, t4, Operand(kHeapObjectTag));
 
       // Check if a non-empty properties array is needed. Continue with
       // allocated object if not fall through to runtime call if it is.
       // a1: constructor function
       // t4: JSObject
       // t5: start of next object (not tagged)
       __ lbu(a3, FieldMemOperand(a2, Map::kUnusedPropertyFieldsOffset));
       // The field instance sizes contains both pre-allocated property fields
       // and in-object properties.
-      __ lw(a0, FieldMemOperand(a2, Map::kInstanceSizesOffset));
-      __ Ext(t6, a0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte,
-             kBitsPerByte);
+      __ lbu(t6, FieldMemOperand(a2, Map::kPreAllocatedPropertyFieldsOffset));
       __ Addu(a3, a3, Operand(t6));
-      __ Ext(t6, a0, Map::kInObjectPropertiesByte * kBitsPerByte,
-              kBitsPerByte);
+      __ lbu(t6, FieldMemOperand(a2, Map::kInObjectPropertiesOffset));
       __ subu(a3, a3, t6);
 
       // Done if no extra properties are to be allocated.
       __ Branch(&allocated, eq, a3, Operand(zero_reg));
       __ Assert(greater_equal, kPropertyAllocationCountFailed,
           a3, Operand(zero_reg));
 
       // Scale the number of elements by pointer size and add the header for
       // FixedArrays to the start of the next object calculation from above.
       // a1: constructor
@@ skipping 1025 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(a3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS