src/hotspot/cpu/x86/macroAssembler_x86.hpp

@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

@@ -361,13 +361,24 @@
    void load_method_holder_cld(Register rresult, Register rmethod);
  
    void load_method_holder(Register holder, Register method);
  
    // oop manipulations
+ #ifdef _LP64
+   void load_nklass_compact(Register dst, Register src);
+ #endif
    void load_klass(Register dst, Register src, Register tmp);
    void store_klass(Register dst, Register src, Register tmp);
  
+   // Compares the Klass pointer of an object to a given Klass (which might be narrow,
+   // depending on UseCompressedClassPointers).
+   void cmp_klass(Register klass, Register dst, Register tmp);
+ 
+   // Compares the Klass pointer of two objects o1 and o2. Result is in the condition flags.
+   // Uses tmp1 and tmp2 as temporary registers.
+   void cmp_klass(Register src, Register dst, Register tmp1, Register tmp2);
+ 
    void access_load_at(BasicType type, DecoratorSet decorators, Register dst, Address src,
                        Register tmp1, Register thread_tmp);
    void access_store_at(BasicType type, DecoratorSet decorators, Address dst, Register val,
                         Register tmp1, Register tmp2, Register tmp3);
  

@@ -2021,12 +2032,12 @@
  
    void vallones(XMMRegister dst, int vector_len);
  
    void check_stack_alignment(Register sp, const char* msg, unsigned bias = 0, Register tmp = noreg);
  
-   void lightweight_lock(Register obj, Register hdr, Register thread, Register tmp, Label& slow);
-   void lightweight_unlock(Register obj, Register hdr, Register tmp, Label& slow);
+   void lightweight_lock(Register obj, Register reg_rax, Register thread, Register tmp, Label& slow);
+   void lightweight_unlock(Register obj, Register reg_rax, Register thread, Register tmp, Label& slow);
  };
  
  /**
   * class SkipIfEqual:
   *