[x64] Assembler support for internal references and RIP relative addressing.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index b973495bfae08f81aeffd9812952f703717a1693..330daf6490cec148186c7089d0dc3d66d602b35c 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -37,6 +37,8 @@
 #ifndef V8_X64_ASSEMBLER_X64_H_
 #define V8_X64_ASSEMBLER_X64_H_
 
+#include <deque>
+
 #include "src/serialize.h"
 
 namespace v8 {
@@ -408,6 +410,9 @@ class Operand BASE_EMBEDDED {
   // this must not overflow.
   Operand(const Operand& base, int32_t offset);
 
+  // [rip + disp/r]
+  explicit Operand(Label* label);
+
   // Checks whether either base or index register is the given register.
   // Does not check the "reg" part of the Operand.
   bool AddressUsesRegister(Register reg) const;
@@ -421,7 +426,7 @@ class Operand BASE_EMBEDDED {
 
  private:
   byte rex_;
-  byte buf_[6];
+  byte buf_[9];
   // The number of bytes of buf_ in use.
   byte len_;
 
@@ -437,6 +442,7 @@ class Operand BASE_EMBEDDED {
   // Needs to be called after set_sib, not before it.
   inline void set_disp8(int disp);
   inline void set_disp32(int disp);
+  inline void set_disp64(int64_t disp);  // for labels.
 
   friend class Assembler;
 };
@@ -888,6 +894,7 @@ class Assembler : public AssemblerBase {
   void int3();
   void nop();
   void ret(int imm16);
+  void ud2();
   void setcc(Condition cc, Register reg);
 
   // Label operations & relative jumps (PPUM Appendix D)
@@ -934,6 +941,7 @@ class Assembler : public AssemblerBase {
 
   // Jump near absolute indirect (r64)
   void jmp(Register adr);
+  void jmp(const Operand& src);
 
   // Conditional jumps
   void j(Condition cc,
@@ -1344,6 +1352,7 @@ class Assembler : public AssemblerBase {
   // Used for inline tables, e.g., jump-tables.
   void db(uint8_t data);
   void dd(uint32_t data);
+  void dq(Label* label);
 
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
@@ -1371,9 +1380,6 @@ class Assembler : public AssemblerBase {
   // Call near indirect
   void call(const Operand& operand);
 
-  // Jump near absolute indirect (m64)
-  void jmp(const Operand& src);
-
  private:
   byte* addr_at(int pos)  { return buffer_ + pos; }
   uint32_t long_at(int pos)  {
@@ -1811,6 +1817,11 @@ class Assembler : public AssemblerBase {
   // code generation
   RelocInfoWriter reloc_info_writer;
 
+  // Internal reference positions, required for (potential) patching in
+  // GrowBuffer(); contains only those internal references whose labels
+  // are already bound.
+  std::deque<int> internal_reference_positions_;
+
   List< Handle<Code> > code_targets_;
 
   PositionsRecorder positions_recorder_;