Mercurial > hg > graal-compiler
view graal/com.oracle.graal.lir.sparc/src/com/oracle/graal/lir/sparc/SPARCFrameMap.java @ 17237:c990248e816e
[SPARC] changed register counts due to hint
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Fri, 26 Sep 2014 10:40:34 -0700 |
parents | 6514c67b7efa |
children | 3c7e73362d6a |
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/* * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.lir.sparc; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.lir.*; import com.oracle.graal.sparc.*; /** * SPARC specific frame map. * * This is the format of a SPARC stack frame: * * <pre> * Base Contents * * : : ----- * caller | incoming overflow argument n | ^ * frame : ... : | positive * | incoming overflow argument 0 | | offsets * +--------------------------------+ | * | | | * : register save area : | * | | | * ---------+--------------------------------+--------------------------- * | spill slot 0 | | negative ^ ^ * : ... : v offsets | | * | spill slot n | ----- total | * +--------------------------------+ frame | * current | alignment padding | size | * frame +--------------------------------+ ----- | | * | outgoing overflow argument n | ^ | frame * : ... : | positive | size * | outgoing overflow argument 0 | | offsets | | * +--------------------------------+ | | | * | return address | | | | * +--------------------------------+ | | | * | | | | | * : callee save area : | | | * | | | v v * %sp--> +--------------------------------+--------------------------- * * </pre> * * The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such * a block may be greater than the size of a normal spill slot or the word size. * <p> * A runtime can reserve space at the beginning of the overflow argument area. The calling * convention can specify that the first overflow stack argument is not at offset 0, but at a * specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that * call-free methods also have this space reserved. Then the VM can use the memory at offset 0 * relative to the stack pointer. */ public final class SPARCFrameMap extends FrameMap { public SPARCFrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig) { super(codeCache, registerConfig); // offset relative to sp + total frame size initialSpillSize = 0; spillSize = initialSpillSize; } @Override public int totalFrameSize() { return frameSize(); } @Override public int currentFrameSize() { return alignFrameSize(calleeSaveAreaSize() + returnAddressSize() + outgoingSize + spillSize); } @Override protected int alignFrameSize(int size) { return NumUtil.roundUp(size, target.stackAlignment); } @Override public int offsetToCalleeSaveArea() { return 0; } @Override protected StackSlot allocateNewSpillSlot(LIRKind kind, int additionalOffset) { return StackSlot.get(kind, -spillSize + additionalOffset, true); } /** * In SPARC we have spill slots word aligned */ @Override public int spillSlotSize(LIRKind kind) { return SPARC.spillSlotSize(target, kind.getPlatformKind()); } /** * We must add the calleSaveAreaSize() when it is a in or out parameter */ @Override public int offsetForStackSlot(StackSlot slot) { int offset = super.offsetForStackSlot(slot); if (slot.getRawOffset() >= 0) { // If In or Out parameter offset += calleeSaveAreaSize(); } return offset; } @Override public boolean frameNeedsAllocating() { return super.frameNeedsAllocating() || spillSize > 0; } }