author | zgu |
Wed, 06 Nov 2019 09:50:53 -0500 | |
changeset 58946 | 83810b7d12e7 |
parent 54423 | 6c0ab8bd8da5 |
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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source_hpp %{ |
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#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp" |
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#include "gc/shenandoah/c2/shenandoahSupport.hpp" |
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%} |
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instruct compareAndSwapP_shenandoah(rRegI res, |
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memory mem_ptr, |
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rRegP tmp1, rRegP tmp2, |
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rax_RegP oldval, rRegP newval, |
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rFlagsReg cr) |
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%{ |
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predicate(VM_Version::supports_cx8()); |
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match(Set res (ShenandoahCompareAndSwapP mem_ptr (Binary oldval newval))); |
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match(Set res (ShenandoahWeakCompareAndSwapP mem_ptr (Binary oldval newval))); |
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effect(TEMP tmp1, TEMP tmp2, KILL cr, KILL oldval); |
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format %{ "shenandoah_cas_oop $mem_ptr,$newval" %} |
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ins_encode %{ |
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ShenandoahBarrierSet::assembler()->cmpxchg_oop(&_masm, |
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$res$$Register, $mem_ptr$$Address, $oldval$$Register, $newval$$Register, |
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false, // swap |
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$tmp1$$Register, $tmp2$$Register |
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); |
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%} |
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ins_pipe( pipe_cmpxchg ); |
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%} |
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instruct compareAndSwapN_shenandoah(rRegI res, |
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memory mem_ptr, |
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rRegP tmp1, rRegP tmp2, |
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rax_RegN oldval, rRegN newval, |
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rFlagsReg cr) %{ |
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match(Set res (ShenandoahCompareAndSwapN mem_ptr (Binary oldval newval))); |
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match(Set res (ShenandoahWeakCompareAndSwapN mem_ptr (Binary oldval newval))); |
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effect(TEMP tmp1, TEMP tmp2, KILL cr, KILL oldval); |
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format %{ "shenandoah_cas_oop $mem_ptr,$newval" %} |
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ins_encode %{ |
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ShenandoahBarrierSet::assembler()->cmpxchg_oop(&_masm, |
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$res$$Register, $mem_ptr$$Address, $oldval$$Register, $newval$$Register, |
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false, // swap |
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$tmp1$$Register, $tmp2$$Register |
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); |
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%} |
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ins_pipe( pipe_cmpxchg ); |
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%} |
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instruct compareAndExchangeN_shenandoah(memory mem_ptr, |
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rax_RegN oldval, rRegN newval, |
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rRegP tmp1, rRegP tmp2, |
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rFlagsReg cr) %{ |
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match(Set oldval (ShenandoahCompareAndExchangeN mem_ptr (Binary oldval newval))); |
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effect(TEMP tmp1, TEMP tmp2, KILL cr); |
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format %{ "shenandoah_cas_oop $mem_ptr,$newval" %} |
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ins_encode %{ |
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ShenandoahBarrierSet::assembler()->cmpxchg_oop(&_masm, |
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NULL, $mem_ptr$$Address, $oldval$$Register, $newval$$Register, |
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true, // exchange |
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$tmp1$$Register, $tmp2$$Register |
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); |
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%} |
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ins_pipe( pipe_cmpxchg ); |
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%} |
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instruct compareAndExchangeP_shenandoah(memory mem_ptr, |
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rax_RegP oldval, rRegP newval, |
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rRegP tmp1, rRegP tmp2, |
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rFlagsReg cr) |
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%{ |
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predicate(VM_Version::supports_cx8()); |
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match(Set oldval (ShenandoahCompareAndExchangeP mem_ptr (Binary oldval newval))); |
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effect(KILL cr, TEMP tmp1, TEMP tmp2); |
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ins_cost(1000); |
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format %{ "shenandoah_cas_oop $mem_ptr,$newval" %} |
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ins_encode %{ |
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105 |
ShenandoahBarrierSet::assembler()->cmpxchg_oop(&_masm, |
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106 |
NULL, $mem_ptr$$Address, $oldval$$Register, $newval$$Register, |
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8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
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107 |
true, // exchange |
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8217016: Shenandoah: Streamline generation of CAS barriers
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108 |
$tmp1$$Register, $tmp2$$Register |
52925
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109 |
); |
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110 |
%} |
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111 |
ins_pipe( pipe_cmpxchg ); |
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112 |
%} |