67 __ lsr(end, end, CardTable::card_shift());
68 __ sub(count, end, start); // number of bytes to copy
69
70 __ load_byte_map_base(scratch);
71 __ add(start, start, scratch);
72 __ bind(L_loop);
73 __ strb(zr, Address(start, count));
74 __ subs(count, count, 1);
75 __ br(Assembler::GE, L_loop);
76 __ bind(L_done);
77 }
78
79 void CardTableBarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
80 Address dst, Register val, Register tmp1, Register tmp2, Register tmp3) {
81 bool in_heap = (decorators & IN_HEAP) != 0;
82 bool is_array = (decorators & IS_ARRAY) != 0;
83 bool on_anonymous = (decorators & ON_UNKNOWN_OOP_REF) != 0;
84 bool precise = is_array || on_anonymous;
85
86 bool needs_post_barrier = val != noreg && in_heap;
87 BarrierSetAssembler::store_at(masm, decorators, type, dst, val, noreg, noreg, noreg);
88 if (needs_post_barrier) {
89 // flatten object address if needed
90 if (!precise || (dst.index() == noreg && dst.offset() == 0)) {
91 store_check(masm, dst.base(), dst);
92 } else {
93 __ lea(tmp3, dst);
94 store_check(masm, tmp3, dst);
95 }
96 }
97 }
|
67 __ lsr(end, end, CardTable::card_shift());
68 __ sub(count, end, start); // number of bytes to copy
69
70 __ load_byte_map_base(scratch);
71 __ add(start, start, scratch);
72 __ bind(L_loop);
73 __ strb(zr, Address(start, count));
74 __ subs(count, count, 1);
75 __ br(Assembler::GE, L_loop);
76 __ bind(L_done);
77 }
78
79 void CardTableBarrierSetAssembler::oop_store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
80 Address dst, Register val, Register tmp1, Register tmp2, Register tmp3) {
81 bool in_heap = (decorators & IN_HEAP) != 0;
82 bool is_array = (decorators & IS_ARRAY) != 0;
83 bool on_anonymous = (decorators & ON_UNKNOWN_OOP_REF) != 0;
84 bool precise = is_array || on_anonymous;
85
86 bool needs_post_barrier = val != noreg && in_heap;
87
88 BarrierSetAssembler::store_at(masm, decorators, type, dst, val, noreg, noreg, noreg);
89 if (needs_post_barrier) {
90 // flatten object address if needed
91 if (!precise || (dst.index() == noreg && dst.offset() == 0)) {
92 if (tmp3 != noreg) {
93 // TODO 8366717 This change is from before the 'tmp3' arg was added to mainline, check if it's still needed. Same on x64. Also, this should be a __ lea
94 // Called by MacroAssembler::pack_inline_helper. We cannot corrupt the dst.base() register
95 __ mov(tmp3, dst.base());
96 store_check(masm, tmp3, dst);
97 } else {
98 // It's OK to corrupt the dst.base() register.
99 store_check(masm, dst.base(), dst);
100 }
101 } else {
102 __ lea(tmp3, dst);
103 store_check(masm, tmp3, dst);
104 }
105 }
106 }
|