1 /*
   2  * Copyright (c) 2008, 2014, 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 #ifndef CPU_ARM_VM_C1_LINEARSCAN_ARM_HPP
  26 #define CPU_ARM_VM_C1_LINEARSCAN_ARM_HPP
  27 
  28 inline bool LinearScan::is_processed_reg_num(int reg_num) {
  29   return reg_num < pd_nof_cpu_regs_processed_in_linearscan ||
  30          reg_num >= pd_nof_cpu_regs_frame_map;
  31 }
  32 
  33 inline int LinearScan::num_physical_regs(BasicType type) {
  34   if (type == T_LONG || type == T_DOUBLE) return 2;
  35   return 1;
  36 }
  37 
  38 
  39 inline bool LinearScan::requires_adjacent_regs(BasicType type) {
  40   return type == T_DOUBLE || type == T_LONG;
  41 }
  42 
  43 inline bool LinearScan::is_caller_save(int assigned_reg) {
  44   assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");
  45   return true;
  46 }
  47 
  48 
  49 inline void LinearScan::pd_add_temps(LIR_Op* op) {
  50   // No extra temporals on ARM
  51 }
  52 
  53 
  54 // Implementation of LinearScanWalker
  55 
  56 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
  57 #ifndef __SOFTFP__
  58   if (cur->type() == T_FLOAT || cur->type() == T_DOUBLE) {
  59     _first_reg = pd_first_fpu_reg;
  60     _last_reg = pd_first_fpu_reg + pd_nof_fpu_regs_reg_alloc - 1;
  61     return true;
  62   }
  63 #endif // !__SOFTFP__
  64 
  65   // Use allocatable CPU registers otherwise
  66   _first_reg = pd_first_cpu_reg;
  67   _last_reg = pd_first_cpu_reg + FrameMap::adjust_reg_range(pd_nof_cpu_regs_reg_alloc) - 1;
  68   return true;
  69 }
  70 
  71 #endif // CPU_ARM_VM_C1_LINEARSCAN_ARM_HPP