Use shorting encoding for mov reg, imm.

src/assembler-ia32.cc

 // 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 579 matching lines @@
 
 
 void Assembler::mov(Register dst, int32_t imm32) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xB8 | dst.code());
   emit(imm32);
 }
 
 
+void Assembler::mov(Register dst, const Immediate& x) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0xB8 | dst.code());
+  emit(x);
+}
+
+
 void Assembler::mov(Register dst, Handle<Object> handle) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xB8 | dst.code());
   emit(handle);
 }
 
 
 void Assembler::mov(Register dst, const Operand& src) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0x8B);
   emit_operand(dst, src);
 }
 
 
+void Assembler::mov(Register dst, Register src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x89);
+  EMIT(0xC0 | src.code() << 3 | dst.code());
+}
+
+
 void Assembler::mov(const Operand& dst, const Immediate& x) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xC7);
   emit_operand(eax, dst);
   emit(x);
 }
 
 
 void Assembler::mov(const Operand& dst, Handle<Object> handle) {
@@ skipping 1422 matching lines @@
   ASSERT(bound_label.is_bound());
   ASSERT(0 <= position);
   ASSERT(position + static_cast<int>(sizeof(uint32_t)) <= pc_offset());
   ASSERT(long_at(position) == 0);  // only initialize once!
 
   uint32_t label_loc = reinterpret_cast<uint32_t>(addr_at(bound_label.pos()));
   long_at_put(position, label_loc);
 }
 
 } }  // namespace v8::internal