90 
 91   if (access.is_oop()) {
 92     LIRGenerator* gen = access.gen();
 93 
 94     if (ShenandoahSATBBarrier) {
 95       pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
 96                   LIR_OprFact::illegalOpr);
 97     }
 98 
 99     if (ShenandoahCASBarrier) {
100       cmp_value.load_item();
101       new_value.load_item();
102 
103       LIR_Opr t1 = gen->new_register(T_OBJECT);
104       LIR_Opr t2 = gen->new_register(T_OBJECT);
105       LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
106       LIR_Opr result = gen->new_register(T_INT);
107 
108       __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
109 




110       return result;
111     }
112   }
113 
114   return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);






115 }
116 
117 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess &access, LIRItem &value) {
118   LIRGenerator* gen = access.gen();
119   BasicType type = access.type();
120 
121   LIR_Opr result = gen->new_register(type);
122   value.load_item();
123   LIR_Opr value_opr = value.result();
124 
125   if (access.is_oop()) {
126     value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
127   }
128 
129   assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
130   LIR_Opr tmp_xchg = gen->new_register(T_INT);
131   __ xchg(access.resolved_addr(), value_opr, result, tmp_xchg);
132 
133   if (access.is_oop()) {
134     result = load_reference_barrier_impl(access.gen(), result, LIR_OprFact::addressConst(0),
135                                          access.decorators());
136 
137     LIR_Opr tmp_barrier = gen->new_register(type);
138     __ move(result, tmp_barrier);
139     result = tmp_barrier;
140 
141     if (ShenandoahSATBBarrier) {
142       pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr, result);
143     }




144   }
145 
146   return result;
147 }

 90 
 91   if (access.is_oop()) {
 92     LIRGenerator* gen = access.gen();
 93 
 94     if (ShenandoahSATBBarrier) {
 95       pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
 96                   LIR_OprFact::illegalOpr);
 97     }
 98 
 99     if (ShenandoahCASBarrier) {
100       cmp_value.load_item();
101       new_value.load_item();
102 
103       LIR_Opr t1 = gen->new_register(T_OBJECT);
104       LIR_Opr t2 = gen->new_register(T_OBJECT);
105       LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
106       LIR_Opr result = gen->new_register(T_INT);
107 
108       __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
109 
110       if (ShenandoahCardBarrier) {
111         post_barrier(access, access.resolved_addr(), new_value.result());
112       }
113 
114       return result;
115     }
116   }
117 
118   LIR_Opr result = BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
119 
120   if (ShenandoahCardBarrier && access.is_oop()) {
121     post_barrier(access, access.resolved_addr(), new_value.result());
122   }
123 
124   return result;
125 }
126 
127 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess &access, LIRItem &value) {
128   LIRGenerator* gen = access.gen();
129   BasicType type = access.type();
130 
131   LIR_Opr result = gen->new_register(type);
132   value.load_item();
133   LIR_Opr value_opr = value.result();
134 
135   if (access.is_oop()) {
136     value_opr = iu_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
137   }
138 
139   assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
140   LIR_Opr tmp_xchg = gen->new_register(T_INT);
141   __ xchg(access.resolved_addr(), value_opr, result, tmp_xchg);
142 
143   if (access.is_oop()) {
144     result = load_reference_barrier_impl(access.gen(), result, LIR_OprFact::addressConst(0),
145                                          access.decorators());
146 
147     LIR_Opr tmp_barrier = gen->new_register(type);
148     __ move(result, tmp_barrier);
149     result = tmp_barrier;
150 
151     if (ShenandoahSATBBarrier) {
152       pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr, result);
153     }
154 
155     if (ShenandoahCardBarrier) {
156       post_barrier(access, access.resolved_addr(), result);
157     }
158   }
159 
160   return result;
161 }