Thumb2 Backend: Enable Assembler to encode Thumb2 instructions

src/arm/constants-arm.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 459 matching lines @@
   BH7  = 1 << 23,
   BH8  = 1 << 24,
   BH9  = 1 << 25,
   BH10 = 1 << 26,
   BH11 = 1 << 27,
   BH12 = 1 << 28,
   BH13 = 1 << 29,
   BH14 = 1 << 30,
   BH15 = 1 << 31,
 
+  MOVW_THUMB_IMM_MASK = (BH10 | 15*BH0 | 7*B12 | 15*B8 | 0xff),
+  MOVW_THUMB_MASK = BH15 | BH14 | BH13 | BH12 | BH9 | BH6,
+
   // Instruction bit masks.
   kCondMask   = 15 << 28,
   kALUMask    = 0x6f << 21,
   kRdMask     = 15 << 12,  // In str instruction.
   kCoprocessorMask = 15 << 8,
   kOpCodeMask = 15 << 21,  // In data-processing instructions.
   kImm24Mask  = (1 << 24) - 1,
   kImm16Mask  = (1 << 16) - 1,
   kImm8Mask  = (1 << 8) - 1,
   kOff12Mask  = (1 << 12) - 1,
@@ skipping 535 matching lines @@
   static int Number(const char* name, bool* is_double);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_