/*

 * Copyright (c) 2000, 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.

 *

 */

#include "precompiled.hpp"

#include "opto/compile.hpp"

#include "opto/node.hpp"

#include "opto/optoreg.hpp"

// processor dependent initialization for i486

void Compile::pd_compiler2_init() {

  guarantee(CodeEntryAlignment >= InteriorEntryAlignment, "" );

  // QQQ presumably all 64bit cpu's support this. Seems like the ifdef could

  // simply be left out.

#ifndef AMD64

  if (!VM_Version::supports_cmov()) {

    ConditionalMoveLimit = 0;

  }

#endif // AMD64

  if (UseAVX < 3) {

    int delta = XMMRegisterImpl::max_slots_per_register * XMMRegisterImpl::number_of_registers;

    int bottom = ConcreteRegisterImpl::max_fpr;

    int top = bottom + delta;

    int middle = bottom + (delta / 2);

    int xmm_slots = XMMRegisterImpl::max_slots_per_register;

    int lower = xmm_slots / 2;

    // mark bad every register that we cannot get to if AVX less than 3, we have all slots in the array

    // Note: vm2opto is allocated to ConcreteRegisterImpl::number_of_registers

    for (int i = bottom; i < middle; i += xmm_slots) {

      for (OptoReg::Name j = OptoReg::Name(i + lower); j<OptoReg::Name(i + xmm_slots); j = OptoReg::add(j, 1)) {

        OptoReg::invalidate(j);

      }

    }

    // mark the upper zmm bank bad and all the mask registers bad in this case

    for (OptoReg::Name i = OptoReg::Name(middle); i<OptoReg::Name(_last_Mach_Reg - 1); i = OptoReg::add(i, 1)) {

      OptoReg::invalidate(i);

    }

  }

}