Add RSB instruction to the ARM integrated assembler.

src/DartARM32/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.
 //
 // This is forked from Dart revision df52deea9f25690eb8b66c5995da92b70f7ac1fe
 // Please update the (git) revision if we merge changes from Dart.
 // https://code.google.com/p/dart/wiki/GettingTheSource
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
@@ skipping 441 matching lines @@
   void and_(Register rd, Register rn, Operand o, Condition cond = AL);
 #endif
 
 #if 0
   // Moved to ARM32::AssemblerARM32::eor()
   void eor(Register rd, Register rn, Operand o, Condition cond = AL);
 
   // Moved to ARM32::AssemberARM32::sub()
   void sub(Register rd, Register rn, Operand o, Condition cond = AL);
   void subs(Register rd, Register rn, Operand o, Condition cond = AL);
-#endif
 
+  // Moved to ARM32::AssemberARM32::rsb()
   void rsb(Register rd, Register rn, Operand o, Condition cond = AL);
   void rsbs(Register rd, Register rn, Operand o, Condition cond = AL);
 
-#if 0
   // Moved to ARM32::AssemblerARM32::add()
   void add(Register rd, Register rn, Operand o, Condition cond = AL);
 
   void adds(Register rd, Register rn, Operand o, Condition cond = AL);
 
   // Moved to ARM32::AssemblerARM32::adc()
   void adc(Register rd, Register rn, Operand o, Condition cond = AL);
 
   void adcs(Register rd, Register rn, Operand o, Condition cond = AL);
 #endif
@@ skipping 839 matching lines @@
   // ARM32::AssemblerARM::uxt() (uxtb and uxth).
 #endif
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_