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);
345 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
346 __ delayed()->mov(L4, O7);
347
348 dirty_card_log_enqueue = start;
349 dirty_card_log_enqueue_end = __ pc();
350 // XXX Should have a guarantee here about not going off the end!
351 // Does it already do so? Do an experiment...
352
353 #undef __
354
355 }
356
357 #define __ masm->
358
359 void G1BarrierSetAssembler::g1_write_barrier_post(MacroAssembler* masm, Register store_addr, Register new_val, Register tmp) {
360 Label filtered;
361 MacroAssembler* post_filter_masm = masm;
362
363 if (new_val == G0) return;
364
365 G1BarrierSet* bs = barrier_set_cast<G1BarrierSet>(Universe::heap()->barrier_set());
366
367 if (G1RSBarrierRegionFilter) {
368 __ xor3(store_addr, new_val, tmp);
369 __ srlx(tmp, HeapRegion::LogOfHRGrainBytes, tmp);
370
371 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pt, filtered);
372 }
373
374 // If the "store_addr" register is an "in" or "local" register, move it to
375 // a scratch reg so we can pass it as an argument.
376 bool use_scr = !(store_addr->is_global() || store_addr->is_out());
377 // Pick a scratch register different from "tmp".
378 Register scr = (tmp == G1_scratch ? G3_scratch : G1_scratch);
379 // Make sure we use up the delay slot!
380 if (use_scr) {
381 post_filter_masm->mov(store_addr, scr);
382 } else {
383 post_filter_masm->nop();
384 }
385 __ save_frame(0);
|
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 "interpreter/interp_masm.hpp"
33 #include "runtime/sharedRuntime.hpp"
34 #include "utilities/macros.hpp"
35
36 #define __ masm->
37
38 void G1BarrierSetAssembler::gen_write_ref_array_pre_barrier(MacroAssembler* masm, DecoratorSet decorators,
39 Register addr, Register count) {
40 bool dest_uninitialized = (decorators & AS_DEST_NOT_INITIALIZED) != 0;
41 // With G1, don't generate the call if we statically know that the target in uninitialized
42 if (!dest_uninitialized) {
43 Register tmp = O5;
44 assert_different_registers(addr, count, tmp);
45 Label filtered;
46 // Is marking active?
47 if (in_bytes(SATBMarkQueue::byte_width_of_active()) == 4) {
48 __ ld(G2, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()), tmp);
49 } else {
50 guarantee(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "Assumption");
51 __ ldsb(G2, in_bytes(G1ThreadLocalData::satb_mark_queue_active_offset()), tmp);
344 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
345 __ delayed()->mov(L4, O7);
346
347 dirty_card_log_enqueue = start;
348 dirty_card_log_enqueue_end = __ pc();
349 // XXX Should have a guarantee here about not going off the end!
350 // Does it already do so? Do an experiment...
351
352 #undef __
353
354 }
355
356 #define __ masm->
357
358 void G1BarrierSetAssembler::g1_write_barrier_post(MacroAssembler* masm, Register store_addr, Register new_val, Register tmp) {
359 Label filtered;
360 MacroAssembler* post_filter_masm = masm;
361
362 if (new_val == G0) return;
363
364 G1BarrierSet* bs = barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
365
366 if (G1RSBarrierRegionFilter) {
367 __ xor3(store_addr, new_val, tmp);
368 __ srlx(tmp, HeapRegion::LogOfHRGrainBytes, tmp);
369
370 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pt, filtered);
371 }
372
373 // If the "store_addr" register is an "in" or "local" register, move it to
374 // a scratch reg so we can pass it as an argument.
375 bool use_scr = !(store_addr->is_global() || store_addr->is_out());
376 // Pick a scratch register different from "tmp".
377 Register scr = (tmp == G1_scratch ? G3_scratch : G1_scratch);
378 // Make sure we use up the delay slot!
379 if (use_scr) {
380 post_filter_masm->mov(store_addr, scr);
381 } else {
382 post_filter_masm->nop();
383 }
384 __ save_frame(0);
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