1 /*
   2  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "asm/assembler.hpp"
  27 #include "code/vmreg.hpp"
  28 
  29 // First VMReg value that could refer to a stack slot
  30 VMReg VMRegImpl::stack0 = (VMReg)(intptr_t)((ConcreteRegisterImpl::number_of_registers + 1) & ~1);
  31 
  32 // VMRegs are 4 bytes wide on all platforms
  33 const int VMRegImpl::stack_slot_size = 4;
  34 const int VMRegImpl::slots_per_word = wordSize / stack_slot_size;
  35 
  36 const int VMRegImpl::register_count = ConcreteRegisterImpl::number_of_registers;
  37 // Register names
  38 const char *VMRegImpl::regName[ConcreteRegisterImpl::number_of_registers];
  39 
  40 void VMRegImpl::print_on(outputStream* st) const {
  41   if( is_reg() ) {
  42     assert( VMRegImpl::regName[value()], "" );
  43     st->print("%s",VMRegImpl::regName[value()]);
  44   } else if (is_stack()) {
  45     int stk = value() - stack0->value();
  46     st->print("[%d]", stk*4);
  47   } else {
  48     st->print("BAD!");
  49   }
  50 }