ARM: Use ubfx and movw instructions to avoid a PC-relative load on

src/spaces.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 702 matching lines @@
   bool WasSweptPrecisely() { return IsFlagSet(WAS_SWEPT_PRECISELY); }
   bool WasSweptConservatively() { return IsFlagSet(WAS_SWEPT_CONSERVATIVELY); }
   bool WasSwept() { return WasSweptPrecisely() || WasSweptConservatively(); }
 
   void MarkSweptPrecisely() { SetFlag(WAS_SWEPT_PRECISELY); }
   void MarkSweptConservatively() { SetFlag(WAS_SWEPT_CONSERVATIVELY); }
 
   void ClearSweptPrecisely() { ClearFlag(WAS_SWEPT_PRECISELY); }
   void ClearSweptConservatively() { ClearFlag(WAS_SWEPT_CONSERVATIVELY); }
 
+  static Map* MapFromIntraPageOffset(int32_t offset);
+
+  Address RoundUpToObjectAlignment(Address a);
+
 #ifdef DEBUG
   void Print();
 #endif  // DEBUG
 
   friend class MemoryAllocator;
 };
 
 
 STATIC_CHECK(sizeof(Page) <= MemoryChunk::kHeaderSize);
 
@@ skipping 249 matching lines @@
   // Reports statistic info of the space.
   void ReportStatistics();
 #endif
 
   MemoryChunk* AllocateChunk(intptr_t body_size,
                              Executability executable,
                              Space* space);
 
   Address ReserveAlignedMemory(size_t requested,
                                size_t alignment,
-                               VirtualMemory* controller);
+                               VirtualMemory* controller,
+                               intptr_t preferred_placement = 0);
   Address AllocateAlignedMemory(size_t requested,
                                 size_t alignment,
                                 Executability executable,
-                                VirtualMemory* controller);
+                                VirtualMemory* controller,
+                                intptr_t preferred_placement = 0);
 
   void FreeMemory(VirtualMemory* reservation, Executability executable);
   void FreeMemory(Address addr, size_t size, Executability executable);
 
   // Commit a contiguous block of memory from the initial chunk.  Assumes that
   // the address is not NULL, the size is greater than zero, and that the
   // block is contained in the initial chunk.  Returns true if it succeeded
   // and false otherwise.
   bool CommitBlock(Address start, size_t size, Executability executable);
 
@@ skipping 1649 matching lines @@
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_