Adds support for ARMv6.

runtime/vm/assembler_arm.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 45 matching lines @@
   void LinkTo(intptr_t position) {
     ASSERT(!IsBound());
     position_ = position + kWordSize;
     ASSERT(IsLinked());
   }
 
   friend class Assembler;
   DISALLOW_COPY_AND_ASSIGN(Label);
 };
 
+
 // Encodes Addressing Mode 1 - Data-processing operands.
 class ShifterOperand : public ValueObject {
  public:
   // Data-processing operands - Uninitialized.
   ShifterOperand() : type_(-1), encoding_(-1) { }
 
   // Data-processing operands - Copy constructor.
   ShifterOperand(const ShifterOperand& other)
       : ValueObject(), type_(other.type_), encoding_(other.encoding_) { }
 
@@ skipping 507 matching lines @@
 
 
   // Signed integer division of left by right. Checks to see if integer
   // division is supported. If not, uses the FPU for division with
   // temporary registers tmpl and tmpr. tmpl and tmpr must be different
   // registers.
   void IntegerDivide(Register result, Register left, Register right,
                      DRegister tmpl, DRegister tmpr);
 
   // Load and Store. May clobber IP.
+  void LoadPatchableImmediate(Register rd, int32_t value, Condition cond = AL);
+  void LoadDecodableImmediate(Register rd, int32_t value, Condition cond = AL);
   void LoadImmediate(Register rd, int32_t value, Condition cond = AL);
   void LoadSImmediate(SRegister sd, float value, Condition cond = AL);
   void LoadDImmediate(DRegister dd, double value,
                       Register scratch, Condition cond = AL);
 
   void MarkExceptionHandler(Label* label);
 
   void Drop(intptr_t stack_elements);
 
   void LoadPoolPointer();
@@ skipping 145 matching lines @@
  private:
   AssemblerBuffer buffer_;  // Contains position independent code.
   GrowableObjectArray& object_pool_;  // Objects and patchable jump targets.
   int32_t prologue_offset_;
 
   bool use_far_branches_;
 
   int32_t AddObject(const Object& obj);
   int32_t AddExternalLabel(const ExternalLabel* label);
 
+  void BindARMv6(Label* label);
+  void BindARMv7(Label* label);
+
   class CodeComment : public ZoneAllocated {
    public:
     CodeComment(intptr_t pc_offset, const String& comment)
         : pc_offset_(pc_offset), comment_(comment) { }
 
     intptr_t pc_offset() const { return pc_offset_; }
     const String& comment() const { return comment_; }
 
    private:
     intptr_t pc_offset_;
@@ skipping 112 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_