Direct call C++ functions

src/x64/macro-assembler-x64.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 20 matching lines @@
 #include "assembler.h"
 
 namespace v8 {
 namespace internal {
 
 // Default scratch register used by MacroAssembler (and other code that needs
 // a spare register). The register isn't callee save, and not used by the
 // function calling convention.
 static const Register kScratchRegister = r10;
 
+// Registers for passing arguments into a C function.
+#ifdef _WIN64
+static const int kCArgRegsCount = 4;
+static const RegList kCCallerSaved =
+    rax.bit() | rcx.bit() | rdx.bit() | r8.bit() |
+    r9.bit() | r10.bit() | r11.bit();
+#else
+static const int kCArgRegsCount = 6;
+static const RegList kCCallerSaved =
+    rax.bit() | rcx.bit() | rdx.bit() | rsi.bit() | rdi.bit() | r8.bit() |
+    r9.bit() | r10.bit() | r11.bit();
+#endif
+extern const Register kCArgRegs[kCArgRegsCount];
+
+
 // Convenience for platform-independent signatures.
 typedef Operand MemOperand;
 
 // Forward declaration.
 class JumpTarget;
 
 struct SmiIndex {
   SmiIndex(Register index_register, ScaleFactor scale)
       : reg(index_register),
         scale(scale) {}
@@ skipping 597 matching lines @@
   // Eventually this should be used for all C calls.
   void CallRuntime(Runtime::Function* f, int num_arguments);
 
   // Convenience function: Same as above, but takes the fid instead.
   void CallRuntime(Runtime::FunctionId id, int num_arguments);
 
   // Convenience function: call an external reference.
   void CallExternalReference(const ExternalReference& ext,
                              int num_arguments);
 
-  // Tail call of a runtime routine (jump).
-  // Like JumpToRuntime, but also takes care of passing the number
+  // Tail call of a runtime routine (jump or equivalent if jump is not
+  // possible). Like JumpToRuntime, but also takes care of passing the number
   // of arguments.
-  void TailCallRuntime(const ExternalReference& ext,
+  void TailCallRuntime(Runtime::FunctionId id,
                        int num_arguments,
                        int result_size);
 
+  void TailCallExternalReference(const ExternalReference& ext,
+                                 int num_arguments,
+                                 int result_size);
+
+
   // Jump to a runtime routine.
   void JumpToRuntime(const ExternalReference& ext, int result_size);
 
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, arguments must be stored in esp[0], esp[4],
   // etc., not pushed. The argument count assumes all arguments are word sized.
   // The number of slots reserved for arguments depends on platform. On Windows
   // stack slots are reserved for the arguments passed in registers. On other
   // platforms stack slots are only reserved for the arguments actually passed
   // on the stack.
@@ skipping 129 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_