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 *
70 #endif
71
72 LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) {
73
74 if (access.is_oop()) {
75 LIRGenerator* gen = access.gen();
76 if (ShenandoahSATBBarrier) {
77 pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
78 LIR_OprFact::illegalOpr /* pre_val */);
79 }
80 if (ShenandoahCASBarrier) {
81 cmp_value.load_item_force(FrameMap::rax_oop_opr);
82 new_value.load_item();
83
84 LIR_Opr t1 = gen->new_register(T_OBJECT);
85 LIR_Opr t2 = gen->new_register(T_OBJECT);
86 LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
87 LIR_Opr result = gen->new_register(T_INT);
88
89 __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
90 return result;
91 }
92 }
93 return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
94 }
95
96 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
97 LIRGenerator* gen = access.gen();
98 BasicType type = access.type();
99
100 LIR_Opr result = gen->new_register(type);
101 value.load_item();
102 LIR_Opr value_opr = value.result();
103
104 if (access.is_oop()) {
105 value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
106 }
107
108 // Because we want a 2-arg form of xchg and xadd
109 __ move(value_opr, result);
110
111 assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
112 __ xchg(access.resolved_addr(), result, result, LIR_OprFact::illegalOpr);
113
114 if (access.is_oop()) {
115 result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0), access.decorators());
116 LIR_Opr tmp = gen->new_register(type);
117 __ move(result, tmp);
118 result = tmp;
119 if (ShenandoahSATBBarrier) {
120 pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr,
121 result /* pre_val */);
122 }
123 }
124
125 return result;
126 }
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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 *
71 #endif
72
73 LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) {
74
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_force(FrameMap::rax_oop_opr);
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
92 if (ShenandoahCardBarrier) {
93 post_barrier(access, access.resolved_addr(), new_value.result());
94 }
95 return result;
96 }
97 }
98
99 LIR_Opr result = BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
100
101 if (ShenandoahCardBarrier && access.is_oop()) {
102 post_barrier(access, access.resolved_addr(), new_value.result());
103 }
104
105 return result;
106 }
107
108 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
109 LIRGenerator* gen = access.gen();
110 BasicType type = access.type();
111
112 LIR_Opr result = gen->new_register(type);
113 value.load_item();
114 LIR_Opr value_opr = value.result();
115
116 if (access.is_oop()) {
117 value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
118 }
119
120 // Because we want a 2-arg form of xchg and xadd
121 __ move(value_opr, result);
122
123 assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
124 __ xchg(access.resolved_addr(), result, result, LIR_OprFact::illegalOpr);
125
126 if (access.is_oop()) {
127 result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0), access.decorators());
128 LIR_Opr tmp = gen->new_register(type);
129 __ move(result, tmp);
130 result = tmp;
131 if (ShenandoahSATBBarrier) {
132 pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr,
133 result /* pre_val */);
134 }
135 if (ShenandoahCardBarrier) {
136 post_barrier(access, access.resolved_addr(), result);
137 }
138 }
139
140 return result;
141 }
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