Add implementation of control flow and label binding to x64 assembler.

src/x64/assembler-x64-inl.h

 // Copyright 2009 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 26 matching lines @@
   return static_cast<Condition>(cc ^ 1);
 }
 
 
 // -----------------------------------------------------------------------------
 // Implementation of Assembler
 
 #define EMIT(x)                                 \
   *pc_++ = (x)
 
+void Assembler::emit(uint32_t x) {
+  *reinterpret_cast<uint32_t*>(pc_) = x;
+  pc_ += sizeof(uint32_t);
+}
 
 void Assembler::emit_rex_64(Register reg, Register rm_reg) {
   EMIT(0x48 | (reg.code() & 0x8) >> 1 | rm_reg.code() >> 3);
 }
 
 
 void Assembler::emit_rex_64(Register reg, const Operand& op) {
   EMIT(0x48 | (reg.code() & 0x8) >> 1 | op.rex_);
 }
 
@@ skipping 142 matching lines @@
 
 
 Operand::Operand(Register reg) {
   // reg
   set_modrm(3, reg);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_INL_H_