Add movw and movt support for ARMv7. This includes some code from...

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 530 matching lines @@
 extern const Instr kMovLrPc;
 extern const Instr kLdrPCMask;
 extern const Instr kLdrPCPattern;
 extern const Instr kBlxRegMask;
 extern const Instr kBlxRegPattern;
 
 extern const Instr kMovMvnMask;
 extern const Instr kMovMvnPattern;
 extern const Instr kMovMvnFlip;
 
+extern const Instr kMovLeaveCCMask;
+extern const Instr kMovLeaveCCPattern;
+extern const Instr kMovwMask;
+extern const Instr kMovwPattern;
+extern const Instr kMovwLeaveCCFlip;
+
 extern const Instr kCmpCmnMask;
 extern const Instr kCmpCmnPattern;
 extern const Instr kCmpCmnFlip;
 
 extern const Instr kALUMask;
 extern const Instr kAddPattern;
 extern const Instr kSubPattern;
 extern const Instr kAndPattern;
 extern const Instr kBicPattern;
 extern const Instr kAddSubFlip;
@@ skipping 207 matching lines @@
            SBit s = LeaveCC, Condition cond = al) {
     orr(dst, src1, Operand(src2), s, cond);
   }
 
   void mov(Register dst, const Operand& src,
            SBit s = LeaveCC, Condition cond = al);
   void mov(Register dst, Register src, SBit s = LeaveCC, Condition cond = al) {
     mov(dst, Operand(src), s, cond);
   }
 
+  // Movw is just mov with the relevant immediate.

[Søren Thygesen Gjesse, 2010/06/21 21:39:26]

We don't need movw which just asserts a 16-bit immediate and calls mov, to
ensure only one instruction is generated?

+  void movt(Register reg, uint32_t immediate, Condition cond = al);
+
   void bic(Register dst, Register src1, const Operand& src2,
            SBit s = LeaveCC, Condition cond = al);
 
   void mvn(Register dst, const Operand& src,
            SBit s = LeaveCC, Condition cond = al);
 
   // Multiply instructions
 
   void mla(Register dst, Register src1, Register src2, Register srcA,
            SBit s = LeaveCC, Condition cond = al);
@@ skipping 410 matching lines @@
 
   friend class RegExpMacroAssemblerARM;
   friend class RelocInfo;
   friend class CodePatcher;
   friend class BlockConstPoolScope;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_