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/*
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* Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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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package org.graalvm.compiler.lir.sparc;
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import org.graalvm.compiler.core.common.LIRKind;
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import org.graalvm.compiler.lir.framemap.FrameMap;
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import jdk.vm.ci.code.CodeCacheProvider;
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import jdk.vm.ci.code.RegisterConfig;
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import jdk.vm.ci.code.StackSlot;
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import jdk.vm.ci.meta.ValueKind;
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import jdk.vm.ci.sparc.SPARC;
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import jdk.vm.ci.sparc.SPARCKind;
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/**
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* SPARC specific frame map.
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*
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* This is the format of a SPARC stack frame:
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*
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* <pre>
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* Base Contents
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* : : -----
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* caller | incoming overflow argument n | ^
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* frame : ... : | positive
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* | incoming overflow argument 0 | | offsets
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* +--------------------------------+ |
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* | | |
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* : register save area : |
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* | | |
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* ---------+--------------------------------+---------------------------
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* | spill slot 0 | | negative ^ ^
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* : ... : v offsets | |
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* | spill slot n | ----- total |
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* +--------------------------------+ frame |
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* current | alignment padding | size |
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* frame +--------------------------------+ ----- | |
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* | outgoing overflow argument n | ^ | frame
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* : ... : | positive | size
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* | outgoing overflow argument 0 | | offsets | |
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* +--------------------------------+ | | |
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* | return address | | | |
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* +--------------------------------+ | | |
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* | | | | |
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* : callee save area : | | |
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* | | | v v
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* %sp--> +--------------------------------+---------------------------
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*
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* </pre>
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*
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* The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such
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* a block may be greater than the size of a normal spill slot or the word size.
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* <p>
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* A runtime can reserve space at the beginning of the overflow argument area. The calling
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* convention can specify that the first overflow stack argument is not at offset 0, but at a
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* specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that
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* call-free methods also have this space reserved. Then the VM can use the memory at offset 0
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* relative to the stack pointer.
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*/
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public final class SPARCFrameMap extends FrameMap {
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public SPARCFrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig, ReferenceMapBuilderFactory referenceMapFactory) {
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super(codeCache, registerConfig, referenceMapFactory);
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// Initial spill size is set to register save area size (SPARC register window)
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initialSpillSize = 0;
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spillSize = initialSpillSize;
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}
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@Override
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public int totalFrameSize() {
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return frameSize();
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}
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@Override
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public int currentFrameSize() {
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return alignFrameSize(SPARC.REGISTER_SAFE_AREA_SIZE + outgoingSize + spillSize);
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}
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/**
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* In SPARC we have spill slots word aligned.
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*/
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@Override
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public int spillSlotSize(ValueKind<?> kind) {
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return kind.getPlatformKind().getSizeInBytes();
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}
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@Override
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public int offsetForStackSlot(StackSlot slot) {
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// @formatter:off
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assert (!slot.getRawAddFrameSize() && slot.getRawOffset() < outgoingSize + SPARC.REGISTER_SAFE_AREA_SIZE) ||
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(slot.getRawAddFrameSize() && slot.getRawOffset() < 0 && -slot.getRawOffset() <= spillSize) ||
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(slot.getRawAddFrameSize() && slot.getRawOffset() >= 0) :
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String.format("RawAddFrameSize: %b RawOffset: 0x%x spillSize: 0x%x outgoingSize: 0x%x", slot.getRawAddFrameSize(), slot.getRawOffset(), spillSize, outgoingSize);
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// @formatter:on
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return super.offsetForStackSlot(slot);
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}
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@Override
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public boolean frameNeedsAllocating() {
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return super.frameNeedsAllocating() || spillSize > 0;
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}
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public StackSlot allocateDeoptimizationRescueSlot() {
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assert spillSize == initialSpillSize : "Deoptimization rescue slot must be the first stack slot";
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return allocateSpillSlot(LIRKind.value(SPARCKind.XWORD));
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}
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}
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