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
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  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 #ifndef AARCH64
  35   if (type == T_LONG || type == T_DOUBLE) return 2;
  36 #endif // !AARCH64
  37   return 1;
  38 }
  39 
  40 
  41 inline bool LinearScan::requires_adjacent_regs(BasicType type) {
  42 #ifdef AARCH64
  43   return false;
  44 #else
  45   return type == T_DOUBLE || type == T_LONG;
  46 #endif // AARCH64
  47 }
  48 
  49 inline bool LinearScan::is_caller_save(int assigned_reg) {
  50   assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");
  51   // TODO-AARCH64 try to add callee-saved registers
  52   return true;
  53 }
  54 
  55 
  56 inline void LinearScan::pd_add_temps(LIR_Op* op) {
  57   // No extra temporals on ARM
  58 }
  59 
  60 
  61 // Implementation of LinearScanWalker
  62 
  63 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
  64 #ifndef __SOFTFP__
  65   if (cur->type() == T_FLOAT || cur->type() == T_DOUBLE) {
  66     _first_reg = pd_first_fpu_reg;
  67     _last_reg = pd_first_fpu_reg + pd_nof_fpu_regs_reg_alloc - 1;
  68     return true;
  69   }
  70 #endif // !__SOFTFP__
  71 
  72   // Use allocatable CPU registers otherwise
  73   _first_reg = pd_first_cpu_reg;
  74   _last_reg = pd_first_cpu_reg + FrameMap::adjust_reg_range(pd_nof_cpu_regs_reg_alloc) - 1;
  75   return true;
  76 }
  77 
  78 #endif // CPU_ARM_VM_C1_LINEARSCAN_ARM_HPP