1 files changed, 60 insertions, 0 deletions
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index 5014f71d3b..b1c61d8688 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -601,6 +601,66 @@ class CodeGenerator: public AstVisitor {
 };
 
 
+// -------------------------------------------------------------------------
+// Code stubs
+//
+// These independent code objects are created once, and used multiple
+// times by generated code to perform common tasks, often the slow
+// case of a JavaScript operation.  They are all subclasses of CodeStub,
+// which is declared in code-stubs.h.
+
+
+// Flag that indicates whether or not the code that handles smi arguments
+// should be placed in the stub, inlined, or omitted entirely.
+enum GenericBinaryFlags {
+  SMI_CODE_IN_STUB,
+  SMI_CODE_INLINED
+};
+
+
+class GenericBinaryOpStub: public CodeStub {
+ public:
+  GenericBinaryOpStub(Token::Value op,
+                      OverwriteMode mode,
+                      GenericBinaryFlags flags)
+      : op_(op), mode_(mode), flags_(flags) {
+    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
+  }
+
+  void GenerateSmiCode(MacroAssembler* masm, Label* slow);
+
+ private:
+  Token::Value op_;
+  OverwriteMode mode_;
+  GenericBinaryFlags flags_;
+
+  const char* GetName();
+
+#ifdef DEBUG
+  void Print() {
+    PrintF("GenericBinaryOpStub (op %s), (mode %d, flags %d)\n",
+           Token::String(op_),
+           static_cast<int>(mode_),
+           static_cast<int>(flags_));
+  }
+#endif
+
+  // Minor key encoding in 16 bits FOOOOOOOOOOOOOMM.
+  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
+  class OpBits: public BitField<Token::Value, 2, 13> {};
+  class FlagBits: public BitField<GenericBinaryFlags, 15, 1> {};
+
+  Major MajorKey() { return GenericBinaryOp; }
+  int MinorKey() {
+    // Encode the parameters in a unique 16 bit value.
+    return OpBits::encode(op_)
+           | ModeBits::encode(mode_)
+           | FlagBits::encode(flags_);
+  }
+  void Generate(MacroAssembler* masm);
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_