Support for MIPS in architecture independent files....

src/objects.h

 // Copyright 2006-2009 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 16 matching lines @@
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include "builtins.h"
 #include "code-stubs.h"
 #include "smart-pointer.h"
 #include "unicode-inl.h"
 #if V8_TARGET_ARCH_ARM
 #include "arm/constants-arm.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/constants-mips.h"
 #endif
 
 //
 // All object types in the V8 JavaScript are described in this file.
 //
 // Inheritance hierarchy:
 //   - Object
 //     - Smi          (immediate small integer)
 //     - Failure      (immediate for marking failed operation)
 //     - HeapObject   (superclass for everything allocated in the heap)
@@ skipping 1273 matching lines @@
 
   // Dispatched behavior.
   Object* HeapNumberToBoolean();
   void HeapNumberPrint();
   void HeapNumberPrint(StringStream* accumulator);
 #ifdef DEBUG
   void HeapNumberVerify();
 #endif
 
   // Layout description.
+//// TODO(MIPS.6)
+//#ifdef V8_TARGET_ARCH_MIPS
+//  // MODIFIED: On MIPS we need doubles to be 8-bytes aligned. (local) Memory
+//  // allocation was modified to return 8-bytes aligned objects, so we also need
+//  // a multiple of 8 offset here
+//  static const int kValueOffset = (HeapObject::kHeaderSize + 7) & ~7 ;
+//#else
   static const int kValueOffset = HeapObject::kHeaderSize;
-  // IEEE doubles are two 32 bit words.  The first is just mantissa, the second
+//#endif
+// IEEE doubles are two 32 bit words.  The first is just mantissa, the second
   // is a mixture of sign, exponent and mantissa.  Our current platforms are all
   // little endian apart from non-EABI arm which is little endian with big
   // endian floating point word ordering!
 #if !defined(V8_HOST_ARCH_ARM) || defined(USE_ARM_EABI)
   static const int kMantissaOffset = kValueOffset;
   static const int kExponentOffset = kValueOffset + 4;
 #else
   static const int kMantissaOffset = kValueOffset + 4;
   static const int kExponentOffset = kValueOffset;
 # define BIG_ENDIAN_FLOATING_POINT 1
 #endif
+
+//// TODO(MIPS.6)
+//#ifdef V8_TARGET_ARCH_MIPS
+////  static const int kSize = kValueOffset + kDoubleSize;
+//  // Fix for double alignement on MIPS
+//  static const int kSize = (kValueOffset + kDoubleSize + 7) & ~7;
+//#else
   static const int kSize = kValueOffset + kDoubleSize;
+//#endif
 
   static const uint32_t kSignMask = 0x80000000u;
   static const uint32_t kExponentMask = 0x7ff00000u;
   static const uint32_t kMantissaMask = 0xfffffu;
   static const int kExponentBias = 1023;
   static const int kExponentShift = 20;
   static const int kMantissaBitsInTopWord = 20;
   static const int kNonMantissaBitsInTopWord = 12;
 
  private:
@@ skipping 3797 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_