913 {
914 BarrierSet* bs = Universe::heap()->barrier_set();
915 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
916 __ save_frame(0);
917 __ set((int)id, O1);
918 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
919 __ should_not_reach_here();
920 break;
921 }
922
923 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
924
925 Register addr = G4;
926 Register cardtable = G5;
927 Register tmp = G1_scratch;
928 Register tmp2 = G3_scratch;
929 jbyte* byte_map_base = barrier_set_cast<CardTableModRefBS>(bs)->byte_map_base;
930
931 Label not_already_dirty, restart, refill, young_card;
932
933 #ifdef _LP64
934 __ srlx(addr, CardTableModRefBS::card_shift, addr);
935 #else
936 __ srl(addr, CardTableModRefBS::card_shift, addr);
937 #endif
938
939 AddressLiteral rs(byte_map_base);
940 __ set(rs, cardtable); // cardtable := <card table base>
941 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
942
943 __ cmp_and_br_short(tmp, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
944
945 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
946 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
947
948 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code");
949 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
950
951 __ bind(young_card);
952 // We didn't take the branch, so we're already dirty: return.
953 // Use return-from-leaf
954 __ retl();
955 __ delayed()->nop();
956
957 // Not dirty.
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913 {
914 BarrierSet* bs = Universe::heap()->barrier_set();
915 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
916 __ save_frame(0);
917 __ set((int)id, O1);
918 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
919 __ should_not_reach_here();
920 break;
921 }
922
923 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
924
925 Register addr = G4;
926 Register cardtable = G5;
927 Register tmp = G1_scratch;
928 Register tmp2 = G3_scratch;
929 jbyte* byte_map_base = barrier_set_cast<CardTableModRefBS>(bs)->byte_map_base;
930
931 Label not_already_dirty, restart, refill, young_card;
932
933 __ srlx(addr, CardTableModRefBS::card_shift, addr);
934
935 AddressLiteral rs(byte_map_base);
936 __ set(rs, cardtable); // cardtable := <card table base>
937 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
938
939 __ cmp_and_br_short(tmp, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
940
941 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
942 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
943
944 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code");
945 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
946
947 __ bind(young_card);
948 // We didn't take the branch, so we're already dirty: return.
949 // Use return-from-leaf
950 __ retl();
951 __ delayed()->nop();
952
953 // Not dirty.
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