author | rkennke |
Tue, 02 Apr 2019 23:00:22 +0200 | |
changeset 54423 | 6c0ab8bd8da5 |
parent 53519 | 74a5ef4c81cc |
child 54742 | f7b4471933d3 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, Red Hat, Inc. All rights reserved. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "c1/c1_LIRAssembler.hpp" |
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#include "c1/c1_MacroAssembler.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSet.hpp" |
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#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp" |
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#include "gc/shenandoah/c1/shenandoahBarrierSetC1.hpp" |
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#define __ masm->masm()-> |
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void LIR_OpShenandoahCompareAndSwap::emit_code(LIR_Assembler* masm) { |
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Register addr = _addr->as_register_lo(); |
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Register newval = _new_value->as_register(); |
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Register cmpval = _cmp_value->as_register(); |
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Register tmp1 = _tmp1->as_register(); |
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Register tmp2 = _tmp2->as_register(); |
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Register result = result_opr()->as_register(); |
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assert(cmpval == rax, "wrong register"); |
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assert(newval != NULL, "new val must be register"); |
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assert(cmpval != newval, "cmp and new values must be in different registers"); |
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assert(cmpval != addr, "cmp and addr must be in different registers"); |
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assert(newval != addr, "new value and addr must be in different registers"); |
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// Apply storeval barrier to newval. |
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ShenandoahBarrierSet::assembler()->storeval_barrier(masm->masm(), newval, tmp1); |
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if (UseCompressedOops) { |
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__ encode_heap_oop(cmpval); |
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__ mov(rscratch1, newval); |
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__ encode_heap_oop(rscratch1); |
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newval = rscratch1; |
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} |
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ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), result, Address(addr, 0), cmpval, newval, false, tmp1, tmp2); |
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} |
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#undef __ |
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#ifdef ASSERT |
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#define __ gen->lir(__FILE__, __LINE__)-> |
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#else |
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#define __ gen->lir()-> |
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#endif |
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LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) { |
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if (access.is_oop()) { |
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LIRGenerator* gen = access.gen(); |
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if (ShenandoahSATBBarrier) { |
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pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(), |
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LIR_OprFact::illegalOpr /* pre_val */); |
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} |
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if (ShenandoahCASBarrier) { |
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cmp_value.load_item_force(FrameMap::rax_oop_opr); |
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new_value.load_item(); |
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LIR_Opr t1 = gen->new_register(T_OBJECT); |
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LIR_Opr t2 = gen->new_register(T_OBJECT); |
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LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base(); |
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LIR_Opr result = gen->new_register(T_INT); |
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__ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result)); |
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return result; |
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} |
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} |
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return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value); |
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} |
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LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) { |
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LIRGenerator* gen = access.gen(); |
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BasicType type = access.type(); |
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LIR_Opr result = gen->new_register(type); |
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value.load_item(); |
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LIR_Opr value_opr = value.result(); |
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if (access.is_oop()) { |
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value_opr = storeval_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators()); |
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} |
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// Because we want a 2-arg form of xchg and xadd |
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__ move(value_opr, result); |
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assert(type == T_INT || type == T_OBJECT || type == T_ARRAY LP64_ONLY( || type == T_LONG ), "unexpected type"); |
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__ xchg(access.resolved_addr(), result, result, LIR_OprFact::illegalOpr); |
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if (access.is_oop()) { |
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result = load_reference_barrier(access.gen(), result, access.access_emit_info(), true); |
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if (ShenandoahSATBBarrier) { |
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pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr, |
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result /* pre_val */); |
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} |
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} |
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return result; |
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} |