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 "precompiled.hpp"
  26 #include "asm/macroAssembler.inline.hpp"
  27 #include "gc/g1/g1BarrierSet.hpp"
  28 #include "gc/g1/g1CardTable.hpp"
  29 #include "gc/g1/g1BarrierSetAssembler.hpp"

  30 #include "gc/g1/heapRegion.hpp"
  31 #include "gc/shared/collectedHeap.hpp"
  32 #include "interpreter/interp_masm.hpp"
  33 #include "runtime/sharedRuntime.hpp"
  34 #include "runtime/thread.hpp"
  35 #include "utilities/macros.hpp"
  36 
  37 #define __ masm->
  38 
  39 void G1BarrierSetAssembler::gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
  40                                                             Register addr, Register count) {
  41   bool dest_uninitialized = (decorators & AS_DEST_NOT_INITIALIZED) != 0;
  42   // With G1, don't generate the call if we statically know that the target in uninitialized
  43   if (!dest_uninitialized) {
  44     Register tmp = O5;
  45     assert_different_registers(addr, count, tmp);
  46     Label filtered;
  47     // Is marking active?
  48     if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
  49       __ ld(G2, in_bytes(JavaThread::satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_active()), tmp);
  50     } else {
  51       guarantee(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1,
  52                 "Assumption");
  53       __ ldsb(G2, in_bytes(JavaThread::satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_active()), tmp);
  54     }
  55     // Is marking active?
  56     __ cmp_and_br_short(tmp, G0, Assembler::equal, Assembler::pt, filtered);
  57 
  58     __ save_frame(0);
  59     // Save the necessary global regs... will be used after.
  60     if (addr->is_global()) {
  61       __ mov(addr, L0);
  62     }
  63     if (count->is_global()) {
  64       __ mov(count, L1);
  65     }
  66     __ mov(addr->after_save(), O0);
  67     // Get the count into O1
  68     address slowpath = UseCompressedOops ? CAST_FROM_FN_PTR(address, G1BarrierSet::write_ref_array_pre_narrow_oop_entry)
  69                                          : CAST_FROM_FN_PTR(address, G1BarrierSet::write_ref_array_pre_oop_entry);
  70     __ call(slowpath);
  71     __ delayed()->mov(count->after_save(), O1);
  72     if (addr->is_global()) {
  73       __ mov(L0, addr);

  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 "precompiled.hpp"
  26 #include "asm/macroAssembler.inline.hpp"
  27 #include "gc/g1/g1BarrierSet.hpp"
  28 #include "gc/g1/g1CardTable.hpp"
  29 #include "gc/g1/g1BarrierSetAssembler.hpp"
  30 #include "gc/g1/g1ThreadLocalData.hpp"
  31 #include "gc/g1/heapRegion.hpp"
  32 #include "gc/shared/collectedHeap.hpp"
  33 #include "interpreter/interp_masm.hpp"
  34 #include "runtime/sharedRuntime.hpp"

  35 #include "utilities/macros.hpp"
  36 
  37 #define __ masm->
  38 
  39 void G1BarrierSetAssembler::gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
  40                                                             Register addr, Register count) {
  41   bool dest_uninitialized = (decorators & AS_DEST_NOT_INITIALIZED) != 0;
  42   // With G1, don't generate the call if we statically know that the target in uninitialized
  43   if (!dest_uninitialized) {
  44     Register tmp = O5;
  45     assert_different_registers(addr, count, tmp);
  46     Label filtered;
  47     // Is marking active?
  48     if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
  49       __ ld(G2, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()), tmp);
  50     } else {
  51       guarantee(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
  52       __ ldsb(G2, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()), tmp);

  53     }
  54     // Is marking active?
  55     __ cmp_and_br_short(tmp, G0, Assembler::equal, Assembler::pt, filtered);
  56 
  57     __ save_frame(0);
  58     // Save the necessary global regs... will be used after.
  59     if (addr->is_global()) {
  60       __ mov(addr, L0);
  61     }
  62     if (count->is_global()) {
  63       __ mov(count, L1);
  64     }
  65     __ mov(addr->after_save(), O0);
  66     // Get the count into O1
  67     address slowpath = UseCompressedOops ? CAST_FROM_FN_PTR(address, G1BarrierSet::write_ref_array_pre_narrow_oop_entry)
  68                                          : CAST_FROM_FN_PTR(address, G1BarrierSet::write_ref_array_pre_oop_entry);
  69     __ call(slowpath);
  70     __ delayed()->mov(count->after_save(), O1);
  71     if (addr->is_global()) {
  72       __ mov(L0, addr);