alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (c1_FpuStackSim_x86.hpp)

This example Java source code file (c1_FpuStackSim_x86.hpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

compilation, cpu_x86_vm_c1_fpustacksim_x86_hpp, fpustacksim, product_return, tos, value_obj_class_spec

The c1_FpuStackSim_x86.hpp Java example source code

/*
 * Copyright (c) 2005, 2010, 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.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
#define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP

//  Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]
//  FPU registers are described as numbers from 0..nof_fpu_regs-1

class Compilation;

class FpuStackSim VALUE_OBJ_CLASS_SPEC {
 private:
  Compilation* _compilation;
  int          _stack_size;
  int          _regs[FrameMap::nof_fpu_regs];

  int tos_index() const                        { return _stack_size - 1; }

  int regs_at(int i) const;
  void set_regs_at(int i, int val);
  void dec_stack_size();
  void inc_stack_size();

  // unified bailout support
  Compilation*  compilation() const              { return _compilation; }
  void          bailout(const char* msg) const   { compilation()->bailout(msg); }
  bool          bailed_out() const               { return compilation()->bailed_out(); }

 public:
  FpuStackSim(Compilation* compilation);
  void pop ();
  void pop (int rnr);                          // rnr must be on tos
  void push(int rnr);
  void swap(int offset);                       // exchange tos with tos + offset
  int offset_from_tos(int rnr) const;          // return the offset of the topmost instance of rnr from TOS
  int  get_slot(int tos_offset) const;         // return the entry at the given offset from TOS
  void set_slot(int tos_offset, int rnr);      // set the entry at the given offset from TOS
  void rename(int old_rnr, int new_rnr);       // rename all instances of old_rnr to new_rnr
  bool contains(int rnr);                      // debugging support only
  bool is_empty();
  bool slot_is_empty(int tos_offset);
  int stack_size() const                       { return _stack_size; }
  void clear();
  intArray* write_state();
  void read_state(intArray* fpu_stack_state);

  void print() PRODUCT_RETURN;
};

#endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP

Other Java examples (source code examples)

Here is a short list of links related to this Java c1_FpuStackSim_x86.hpp source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.