< prev index next >

src/hotspot/cpu/x86/gc/shenandoah/c1/shenandoahBarrierSetC1_x86.cpp

Print this page
rev 58062 : 8239081: Shenandoah: Consolidate C1 LRB and native barriers


  94 
  95 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
  96   LIRGenerator* gen = access.gen();
  97   BasicType type = access.type();
  98 
  99   LIR_Opr result = gen->new_register(type);
 100   value.load_item();
 101   LIR_Opr value_opr = value.result();
 102 
 103   if (access.is_oop()) {
 104     value_opr = storeval_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
 105   }
 106 
 107   // Because we want a 2-arg form of xchg and xadd
 108   __ move(value_opr, result);
 109 
 110   assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
 111   __ xchg(access.resolved_addr(), result, result, LIR_OprFact::illegalOpr);
 112 
 113   if (access.is_oop()) {
 114     result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0));
 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 }


  94 
  95 LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
  96   LIRGenerator* gen = access.gen();
  97   BasicType type = access.type();
  98 
  99   LIR_Opr result = gen->new_register(type);
 100   value.load_item();
 101   LIR_Opr value_opr = value.result();
 102 
 103   if (access.is_oop()) {
 104     value_opr = storeval_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
 105   }
 106 
 107   // Because we want a 2-arg form of xchg and xadd
 108   __ move(value_opr, result);
 109 
 110   assert(type == T_INT || is_reference_type(type) LP64_ONLY( || type == T_LONG ), "unexpected type");
 111   __ xchg(access.resolved_addr(), result, result, LIR_OprFact::illegalOpr);
 112 
 113   if (access.is_oop()) {
 114     result = load_reference_barrier(access.gen(), result, LIR_OprFact::addressConst(0), false);
 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 }
< prev index next >