X87: Assembler support for internal references.

src/x87/assembler-x87.h

Index: src/x87/assembler-x87.h
diff --git a/src/x87/assembler-x87.h b/src/x87/assembler-x87.h
index 6648391cd48eb6d57e640ad8a3c0bf23906d35b6..05359648ad27737382ddabf731234051555317d7 100644
--- a/src/x87/assembler-x87.h
+++ b/src/x87/assembler-x87.h
@@ -37,6 +37,8 @@
 #ifndef V8_X87_ASSEMBLER_X87_H_
 #define V8_X87_ASSEMBLER_X87_H_
 
+#include <deque>
+
 #include "src/assembler.h"
 #include "src/isolate.h"
 #include "src/serialize.h"
@@ -349,6 +351,11 @@ class Operand BASE_EMBEDDED {
                    int32_t disp,
                    RelocInfo::Mode rmode = RelocInfo::NONE32);
 
+  static Operand JumpTable(Register index, ScaleFactor scale, Label* table) {
+    return Operand(index, scale, reinterpret_cast<int32_t>(table),
+                   RelocInfo::INTERNAL_REFERENCE);
+  }
+
   static Operand StaticVariable(const ExternalReference& ext) {
     return Operand(reinterpret_cast<int32_t>(ext.address()),
                    RelocInfo::EXTERNAL_REFERENCE);
@@ -422,11 +429,7 @@ class Operand BASE_EMBEDDED {
 
 class Displacement BASE_EMBEDDED {
  public:
-  enum Type {
-    UNCONDITIONAL_JUMP,
-    CODE_RELATIVE,
-    OTHER
-  };
+  enum Type { UNCONDITIONAL_JUMP, CODE_RELATIVE, OTHER, CODE_ABSOLUTE };
 
   int data() const { return data_; }
   Type type() const { return TypeField::decode(data_); }
@@ -788,6 +791,7 @@ class Assembler : public AssemblerBase {
   void int3();
   void nop();
   void ret(int imm16);
+  void ud2();
 
   // Label operations & relative jumps (PPUM Appendix D)
   //
@@ -943,6 +947,7 @@ class Assembler : public AssemblerBase {
   // inline tables, e.g., jump-tables.
   void db(uint8_t data);
   void dd(uint32_t data);
+  void dd(Label* label);
 
   // Check if there is less than kGap bytes available in the buffer.
   // If this is the case, we need to grow the buffer before emitting
@@ -1013,6 +1018,8 @@ class Assembler : public AssemblerBase {
 
   void emit_operand(Register reg, const Operand& adr);
 
+  void emit_label(Label* label);
+
   void emit_farith(int b1, int b2, int i);
 
   // labels
@@ -1031,6 +1038,11 @@ class Assembler : public AssemblerBase {
   friend class CodePatcher;
   friend class EnsureSpace;
 
+  // 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_;
+
   // code generation
   RelocInfoWriter reloc_info_writer;