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Datei: vmreg.cpp Sprache: C

/*
* Copyright (c) 1998, 2019, 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.
*
*/

#include "precompiled.hpp"
#include "asm/assembler.hpp"
#include "code/vmreg.hpp"

// First VMReg value that could refer to a stack slot.  This is only
// used by SA and jvmti, but it's a leaky abstraction: SA and jvmti
// "know" that stack0 is an integer masquerading as a pointer. For the
// sake of those clients, we preserve this interface.
VMReg VMRegImpl::stack0 = (VMReg)VMRegImpl::stack_0()->value();

// VMRegs are 4 bytes wide on all platforms
const int VMRegImpl::stack_slot_size = 4;
const int VMRegImpl::slots_per_word = wordSize / stack_slot_size;

const int VMRegImpl::register_count = ConcreteRegisterImpl::number_of_registers;
// Register names
const char *VMRegImpl::regName[ConcreteRegisterImpl::number_of_registers];

void VMRegImpl::print_on(outputStream* st) const {
  if (is_reg()) {
    assert(VMRegImpl::regName[value()], "VMRegImpl::regName[" INTPTR_FORMAT "] returns NULL", value());
    st->print("%s",VMRegImpl::regName[value()]);
  } else if (is_stack()) {
    int stk = reg2stack();
    st->print("[%d]", stk*4);
  } else {
    st->print("BAD!");
  }
}

VMRegImpl all_VMRegs[ConcreteRegisterImpl::number_of_registers + 1];

void VMRegImpl::print() const { print_on(tty); }

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