1 /*
2 * Copyright (c) 2018, 2021, Red Hat, Inc. 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 *
71 #endif
72
73 LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) {
74 BasicType bt = access.type();
75 if (access.is_oop()) {
76 LIRGenerator *gen = access.gen();
77 if (ShenandoahSATBBarrier) {
78 pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
79 LIR_OprFact::illegalOpr /* pre_val */);
80 }
81 if (ShenandoahCASBarrier) {
82 cmp_value.load_item();
83 new_value.load_item();
84
85 LIR_Opr t1 = gen->new_register(T_OBJECT);
86 LIR_Opr t2 = gen->new_register(T_OBJECT);
87 LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
88 LIR_Opr result = gen->new_register(T_INT);
89
90 __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
91 return result;
92 }
93 }
94 return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
95 }
96
97 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
98 LIRGenerator* gen = access.gen();
99 BasicType type = access.type();
100
101 LIR_Opr result = gen->new_register(type);
102 value.load_item();
103 LIR_Opr value_opr = value.result();
104
105 if (access.is_oop()) {
106 value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
107 }
108
109 assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
110 LIR_Opr tmp = gen->new_register(T_INT);
111 __ xchg(access.resolved_addr(), value_opr, result, tmp);
112
113 if (access.is_oop()) {
114 result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0), access.decorators());
115 LIR_Opr tmp = gen->new_register(type);
116 __ move(result, tmp);
117 result = tmp;
118 if (ShenandoahSATBBarrier) {
119 pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr,
120 result /* pre_val */);
121 }
122 }
123
124 return result;
125 }
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1 /*
2 * Copyright (c) 2018, 2021, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
72 #endif
73
74 LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) {
75 BasicType bt = access.type();
76 if (access.is_oop()) {
77 LIRGenerator *gen = access.gen();
78 if (ShenandoahSATBBarrier) {
79 pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
80 LIR_OprFact::illegalOpr /* pre_val */);
81 }
82 if (ShenandoahCASBarrier) {
83 cmp_value.load_item();
84 new_value.load_item();
85
86 LIR_Opr t1 = gen->new_register(T_OBJECT);
87 LIR_Opr t2 = gen->new_register(T_OBJECT);
88 LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
89 LIR_Opr result = gen->new_register(T_INT);
90
91 __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
92
93 if (ShenandoahCardBarrier) {
94 post_barrier(access, access.resolved_addr(), new_value.result());
95 }
96 return result;
97 }
98 }
99
100 LIR_Opr result = BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
101
102 if (ShenandoahCardBarrier && access.is_oop()) {
103 post_barrier(access, access.resolved_addr(), new_value.result());
104 }
105
106 return result;
107 }
108
109 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
110 LIRGenerator* gen = access.gen();
111 BasicType type = access.type();
112
113 LIR_Opr result = gen->new_register(type);
114 value.load_item();
115 LIR_Opr value_opr = value.result();
116
117 if (access.is_oop()) {
118 value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
119 }
120
121 assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
122 LIR_Opr tmp = gen->new_register(T_INT);
123 __ xchg(access.resolved_addr(), value_opr, result, tmp);
124
125 if (access.is_oop()) {
126 result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0), access.decorators());
127 LIR_Opr tmp = gen->new_register(type);
128 __ move(result, tmp);
129 result = tmp;
130 if (ShenandoahSATBBarrier) {
131 pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr,
132 result /* pre_val */);
133 }
134 if (ShenandoahCardBarrier) {
135 post_barrier(access, access.resolved_addr(), result);
136 }
137 }
138
139 return result;
140 }
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