1 /*
   2  * Copyright (c) 2016, 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 #include "gc/shared/barrierSetCodeGen.hpp"
  26 #include "interpreter/interp_masm.hpp"
  27 
  28 #define __ masm->
  29 
  30 void BarrierSetCodeGen::load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  31                                 Register dst, Address src, Register tmp1, Register tmp2) {
  32   bool on_heap = (decorators & ACCESS_ON_HEAP) != 0;
  33   bool on_root = (decorators & ACCESS_ON_ROOT) != 0;
  34   switch (type) {
  35   case T_OBJECT:
  36   case T_ARRAY: {
  37     if (on_heap) {
  38       __ load_heap_oop(dst, src);
  39     } else {
  40       assert(on_root, "why else?");
  41       __ movptr(dst, src);
  42     }
  43     break;
  44   }
  45   default: Unimplemented();
  46   }
  47 }
  48 
  49 void BarrierSetCodeGen::store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
  50                                  Address dst, Register val, Register tmp1, Register tmp2) {
  51   bool on_heap = (decorators & ACCESS_ON_HEAP) != 0;
  52   bool on_root = (decorators & ACCESS_ON_ROOT) != 0;
  53   switch (type) {
  54   case T_OBJECT:
  55   case T_ARRAY: {
  56     if (on_heap) {
  57       __ store_heap_oop(dst, val);
  58     } else {
  59       assert(on_root, "why else?");
  60       __ movptr(dst, val);
  61     }
  62     break;
  63   }
  64   default: Unimplemented();
  65   }
  66 }