/*

 * Copyright (c) 2014, Red Hat Inc. 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.

 *

 */

inline bool LinearScan::is_processed_reg_num(int reg_num) {

  return reg_num <= FrameMap::last_cpu_reg() || reg_num >= pd_nof_cpu_regs_frame_map;

}

inline int LinearScan::num_physical_regs(BasicType type) {

  return 1;

}

inline bool LinearScan::requires_adjacent_regs(BasicType type) {

  return false;

}

inline bool LinearScan::is_caller_save(int assigned_reg) {

  assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");

  if (assigned_reg < pd_first_callee_saved_reg)

    return true;

  if (assigned_reg > pd_last_callee_saved_reg && assigned_reg < pd_first_callee_saved_fpu_reg)

    return true;

  if (assigned_reg > pd_last_callee_saved_fpu_reg && assigned_reg < pd_last_fpu_reg)

    return true;

  return false;

}

inline void LinearScan::pd_add_temps(LIR_Op* op) {

  // FIXME ??

}

// Implementation of LinearScanWalker

inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {

  if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::callee_saved)) {

    assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");

    _first_reg = pd_first_callee_saved_reg;

    _last_reg = pd_last_callee_saved_reg;

    return true;

  } else if (cur->type() == T_INT || cur->type() == T_LONG || cur->type() == T_OBJECT || cur->type() == T_ADDRESS || cur->type() == T_METADATA) {

    _first_reg = pd_first_cpu_reg;

    _last_reg = pd_last_allocatable_cpu_reg;

    return true;

  }

  return false;

}