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PPCSystemLinkage.cpp
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PPCSystemLinkage.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2021 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at http://eclipse.org/legal/epl-2.0
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include "p/codegen/PPCSystemLinkage.hpp"
#include <stddef.h>
#include <stdint.h>
#include "codegen/CodeGenerator.hpp"
#include "codegen/CodeGeneratorUtils.hpp"
#include "codegen/GCStackAtlas.hpp"
#include "codegen/InstOpCode.hpp"
#include "codegen/Instruction.hpp"
#include "codegen/Linkage.hpp"
#include "codegen/Linkage_inlines.hpp"
#include "codegen/LiveRegister.hpp"
#include "codegen/Machine.hpp"
#include "codegen/MemoryReference.hpp"
#include "codegen/RealRegister.hpp"
#include "codegen/Register.hpp"
#include "codegen/RegisterConstants.hpp"
#include "codegen/RegisterDependency.hpp"
#include "codegen/RegisterPair.hpp"
#include "codegen/TreeEvaluator.hpp"
#include "compile/Compilation.hpp"
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "env/CompilerEnv.hpp"
#include "env/ObjectModel.hpp"
#include "env/Processors.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/AutomaticSymbol.hpp"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/MethodSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/ParameterSymbol.hpp"
#include "il/ResolvedMethodSymbol.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "infra/Array.hpp"
#include "infra/Assert.hpp"
#include "infra/List.hpp"
#include "p/codegen/GenerateInstructions.hpp"
#include "p/codegen/PPCOpsDefines.hpp"
#include "runtime/Runtime.hpp"
uint32_t
mappedOffsetToFirstLocal(
TR::CodeGenerator *cg,
const TR::PPCLinkageProperties &linkage)
{
TR::Machine *machine = cg->machine();
uint32_t min_arg_area = machine->getLinkRegisterKilled() ?
(cg->comp()->target().is64Bit() ? 8*8 : 8*4)
: 0;
uint32_t offset = linkage.getOffsetToFirstLocal() +
(cg->getLargestOutgoingArgSize() > min_arg_area ? cg->getLargestOutgoingArgSize() : min_arg_area);
return offset;
}
TR::PPCSystemLinkage::PPCSystemLinkage(TR::CodeGenerator *cg)
: TR::Linkage(cg)
{
int i = 0;
_properties._properties = IntegersInRegisters|FloatsInRegisters|RightToLeft;
if (comp()->target().cpu.isBigEndian())
_properties._properties |= SmallIntParmsAlignedRight;
_properties._registerFlags[TR::RealRegister::NoReg] = 0;
_properties._registerFlags[TR::RealRegister::gr0] = 0;
_properties._registerFlags[TR::RealRegister::gr1] = Preserved|PPC_Reserved; // system sp
_properties._registerFlags[TR::RealRegister::gr2] = Preserved|PPC_Reserved; // TOC/system reserved
_properties._registerFlags[TR::RealRegister::gr3] = IntegerReturn|IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr4] = IntegerReturn|IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr5] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr6] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr7] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr8] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr9] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr10] = IntegerArgument;
_properties._registerFlags[TR::RealRegister::gr11] = 0;
_properties._registerFlags[TR::RealRegister::gr12] = 0;
if (cg->comp()->target().is64Bit())
_properties._registerFlags[TR::RealRegister::gr13] = Preserved|PPC_Reserved; // system
else
_properties._registerFlags[TR::RealRegister::gr13] = Preserved;
for (i = TR::RealRegister::gr14; i <= TR::RealRegister::LastGPR; i++)
_properties._registerFlags[i] = Preserved; // gr14 - gr31 preserved
_properties._registerFlags[TR::RealRegister::fp0] = 0;
_properties._registerFlags[TR::RealRegister::fp1] = FloatArgument|FloatReturn;
_properties._registerFlags[TR::RealRegister::fp2] = FloatArgument|FloatReturn;
_properties._registerFlags[TR::RealRegister::fp3] = FloatArgument|FloatReturn;
_properties._registerFlags[TR::RealRegister::fp4] = FloatArgument|FloatReturn;
_properties._registerFlags[TR::RealRegister::fp5] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp6] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp7] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp8] = FloatArgument;
if (cg->comp()->target().is64Bit() || cg->comp()->target().isAIX())
{
_properties._registerFlags[TR::RealRegister::fp9] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp10] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp11] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp12] = FloatArgument;
_properties._registerFlags[TR::RealRegister::fp13] = FloatArgument;
}
else
{
_properties._registerFlags[TR::RealRegister::fp9] = 0; //non-aix 32bit
_properties._registerFlags[TR::RealRegister::fp10] = 0;
_properties._registerFlags[TR::RealRegister::fp11] = 0;
_properties._registerFlags[TR::RealRegister::fp12] = 0;
_properties._registerFlags[TR::RealRegister::fp13] = 0;
}
for (i = TR::RealRegister::fp14; i <= TR::RealRegister::LastFPR; i++)
_properties._registerFlags[i] = Preserved; // fp14 - fp31 Preserved
for (i = TR::RealRegister::vsr32; i <= TR::RealRegister::vsr51; i++)
_properties._registerFlags[i] = 0; // vsr32 - vsr51 volatile
for (i = TR::RealRegister::vsr52; i <= TR::RealRegister::LastVSR; i++)
_properties._registerFlags[i] = Preserved; // vsr52 - vsr63 Preserved
_properties._registerFlags[TR::RealRegister::cr0] = 0;
_properties._registerFlags[TR::RealRegister::cr1] = 0;
_properties._registerFlags[TR::RealRegister::cr2] = Preserved;
_properties._registerFlags[TR::RealRegister::cr3] = Preserved;
_properties._registerFlags[TR::RealRegister::cr4] = Preserved;
_properties._registerFlags[TR::RealRegister::cr5] = 0;
_properties._registerFlags[TR::RealRegister::cr6] = 0;
_properties._registerFlags[TR::RealRegister::cr7] = 0;
_properties._numIntegerArgumentRegisters = 8;
_properties._firstIntegerArgumentRegister = 0;
if (cg->comp()->target().is64Bit() || cg->comp()->target().isAIX())
_properties._numFloatArgumentRegisters = 13;
else
_properties._numFloatArgumentRegisters = 8;
_properties._firstFloatArgumentRegister = 9;
_properties._numVectorArgumentRegisters = 1; // TODO: finish vector linkage
_properties._firstVectorArgumentRegister = 22;
_properties._argumentRegisters[0] = TR::RealRegister::gr3;
_properties._argumentRegisters[1] = TR::RealRegister::gr4;
_properties._argumentRegisters[2] = TR::RealRegister::gr5;
_properties._argumentRegisters[3] = TR::RealRegister::gr6;
_properties._argumentRegisters[4] = TR::RealRegister::gr7;
_properties._argumentRegisters[5] = TR::RealRegister::gr8;
_properties._argumentRegisters[6] = TR::RealRegister::gr9;
_properties._argumentRegisters[7] = TR::RealRegister::gr10;
// We use a somewhat hacky convention to set the linkageRegisterIndex
// of the GPR containing the environment pointer....we set it
// to just past the number of integer argument registers. That's
// why the following line is here....
_properties._argumentRegisters[8] = TR::RealRegister::gr11;
_properties._argumentRegisters[9] = TR::RealRegister::fp1;
_properties._argumentRegisters[10] = TR::RealRegister::fp2;
_properties._argumentRegisters[11] = TR::RealRegister::fp3;
_properties._argumentRegisters[12] = TR::RealRegister::fp4;
_properties._argumentRegisters[13] = TR::RealRegister::fp5;
_properties._argumentRegisters[14] = TR::RealRegister::fp6;
_properties._argumentRegisters[15] = TR::RealRegister::fp7;
_properties._argumentRegisters[16] = TR::RealRegister::fp8;
if (cg->comp()->target().is64Bit() || cg->comp()->target().isAIX())
{
_properties._argumentRegisters[17] = TR::RealRegister::fp9;
_properties._argumentRegisters[18] = TR::RealRegister::fp10;
_properties._argumentRegisters[19] = TR::RealRegister::fp11;
_properties._argumentRegisters[20] = TR::RealRegister::fp12;
_properties._argumentRegisters[21] = TR::RealRegister::fp13;
}
_properties._argumentRegisters[22] = TR::RealRegister::vsr34;
_properties._firstIntegerReturnRegister = 0;
_properties._firstFloatReturnRegister = 2;
_properties._firstVectorReturnRegister = 6;
_properties._returnRegisters[0] = TR::RealRegister::gr3;
_properties._returnRegisters[1] = TR::RealRegister::gr4;
_properties._returnRegisters[2] = TR::RealRegister::fp1;
_properties._returnRegisters[3] = TR::RealRegister::fp2;
_properties._returnRegisters[4] = TR::RealRegister::fp3;
_properties._returnRegisters[5] = TR::RealRegister::fp4;
_properties._returnRegisters[6] = TR::RealRegister::vsr34;
if (cg->comp()->target().is64Bit())
{
_properties._numAllocatableIntegerRegisters = 29; // 64
_properties._firstAllocatableFloatArgumentRegister = 42; // 64
_properties._lastAllocatableFloatVolatileRegister = 42; // 64
}
else
{
_properties._numAllocatableIntegerRegisters = 30; // 32
_properties._firstAllocatableFloatArgumentRegister = 43; // 32
_properties._lastAllocatableFloatVolatileRegister = 43; // 32
}
if (cg->comp()->target().is32Bit() && cg->comp()->target().isAIX())
_properties._firstAllocatableIntegerArgumentRegister = 9; // aix 32 only
else
_properties._firstAllocatableIntegerArgumentRegister = 8;
_properties._lastAllocatableIntegerVolatileRegister = 10;
_properties._numAllocatableFloatRegisters = 32;
_properties._numAllocatableCCRegisters = 8;
i = 0;
_properties._allocationOrder[i++] = TR::RealRegister::gr12;
if (cg->comp()->target().is32Bit() && cg->comp()->target().isAIX())
_properties._allocationOrder[i++] = TR::RealRegister::gr11;
_properties._allocationOrder[i++] = TR::RealRegister::gr10;
_properties._allocationOrder[i++] = TR::RealRegister::gr9;
_properties._allocationOrder[i++] = TR::RealRegister::gr8;
_properties._allocationOrder[i++] = TR::RealRegister::gr7;
_properties._allocationOrder[i++] = TR::RealRegister::gr6;
_properties._allocationOrder[i++] = TR::RealRegister::gr5;
_properties._allocationOrder[i++] = TR::RealRegister::gr4;
_properties._allocationOrder[i++] = TR::RealRegister::gr3;
if (cg->comp()->target().is64Bit() || !cg->comp()->target().isAIX())
_properties._allocationOrder[i++] = TR::RealRegister::gr11;
_properties._allocationOrder[i++] = TR::RealRegister::gr0;
_properties._allocationOrder[i++] = TR::RealRegister::gr31;
_properties._allocationOrder[i++] = TR::RealRegister::gr30;
_properties._allocationOrder[i++] = TR::RealRegister::gr29;
_properties._allocationOrder[i++] = TR::RealRegister::gr28;
_properties._allocationOrder[i++] = TR::RealRegister::gr27;
_properties._allocationOrder[i++] = TR::RealRegister::gr26;
_properties._allocationOrder[i++] = TR::RealRegister::gr25;
_properties._allocationOrder[i++] = TR::RealRegister::gr24;
_properties._allocationOrder[i++] = TR::RealRegister::gr23;
_properties._allocationOrder[i++] = TR::RealRegister::gr22;
_properties._allocationOrder[i++] = TR::RealRegister::gr21;
_properties._allocationOrder[i++] = TR::RealRegister::gr20;
_properties._allocationOrder[i++] = TR::RealRegister::gr19;
_properties._allocationOrder[i++] = TR::RealRegister::gr18;
_properties._allocationOrder[i++] = TR::RealRegister::gr17;
_properties._allocationOrder[i++] = TR::RealRegister::gr16;
_properties._allocationOrder[i++] = TR::RealRegister::gr15;
_properties._allocationOrder[i++] = TR::RealRegister::gr14;
if (cg->comp()->target().is32Bit())
_properties._allocationOrder[i++] = TR::RealRegister::gr13;
_properties._allocationOrder[i++] = TR::RealRegister::fp0;
_properties._allocationOrder[i++] = TR::RealRegister::fp13;
_properties._allocationOrder[i++] = TR::RealRegister::fp12;
_properties._allocationOrder[i++] = TR::RealRegister::fp11;
_properties._allocationOrder[i++] = TR::RealRegister::fp10;
_properties._allocationOrder[i++] = TR::RealRegister::fp9;
_properties._allocationOrder[i++] = TR::RealRegister::fp8;
_properties._allocationOrder[i++] = TR::RealRegister::fp7;
_properties._allocationOrder[i++] = TR::RealRegister::fp6;
_properties._allocationOrder[i++] = TR::RealRegister::fp5;
_properties._allocationOrder[i++] = TR::RealRegister::fp4;
_properties._allocationOrder[i++] = TR::RealRegister::fp3;
_properties._allocationOrder[i++] = TR::RealRegister::fp2;
_properties._allocationOrder[i++] = TR::RealRegister::fp1;
_properties._allocationOrder[i++] = TR::RealRegister::fp31;
_properties._allocationOrder[i++] = TR::RealRegister::fp30;
_properties._allocationOrder[i++] = TR::RealRegister::fp29;
_properties._allocationOrder[i++] = TR::RealRegister::fp28;
_properties._allocationOrder[i++] = TR::RealRegister::fp27;
_properties._allocationOrder[i++] = TR::RealRegister::fp26;
_properties._allocationOrder[i++] = TR::RealRegister::fp25;
_properties._allocationOrder[i++] = TR::RealRegister::fp24;
_properties._allocationOrder[i++] = TR::RealRegister::fp23;
_properties._allocationOrder[i++] = TR::RealRegister::fp22;
_properties._allocationOrder[i++] = TR::RealRegister::fp21;
_properties._allocationOrder[i++] = TR::RealRegister::fp20;
_properties._allocationOrder[i++] = TR::RealRegister::fp19;
_properties._allocationOrder[i++] = TR::RealRegister::fp18;
_properties._allocationOrder[i++] = TR::RealRegister::fp17;
_properties._allocationOrder[i++] = TR::RealRegister::fp16;
_properties._allocationOrder[i++] = TR::RealRegister::fp15;
_properties._allocationOrder[i++] = TR::RealRegister::fp14;
_properties._allocationOrder[i++] = TR::RealRegister::cr7;
_properties._allocationOrder[i++] = TR::RealRegister::cr6;
_properties._allocationOrder[i++] = TR::RealRegister::cr5;
_properties._allocationOrder[i++] = TR::RealRegister::cr1;
_properties._allocationOrder[i++] = TR::RealRegister::cr0;
_properties._allocationOrder[i++] = TR::RealRegister::cr2;
_properties._allocationOrder[i++] = TR::RealRegister::cr3;
_properties._allocationOrder[i++] = TR::RealRegister::cr4;
_properties._preservedRegisterMapForGC = 0x60007fff;
_properties._methodMetaDataRegister = TR::RealRegister::NoReg;
_properties._normalStackPointerRegister = TR::RealRegister::gr1;
_properties._alternateStackPointerRegister = TR::RealRegister::gr31;
_properties._TOCBaseRegister = TR::RealRegister::gr2;
_properties._vtableIndexArgumentRegister = TR::RealRegister::NoReg;
_properties._j9methodArgumentRegister = TR::RealRegister::NoReg;
// Note: FPRs 14-31 are preserved, however if you use them as vector registers you must
// assume the additional 64 bits are volatile because the callee will only preserve
// the FPR portion and the additional 64 bits will be undefined after the callee returns.
if (cg->comp()->target().is64Bit())
{
bool isBE = cg->comp()->target().cpu.isBigEndian();
// Volatile GPR (0,2-12) + FPR (0-13) + CCR (0-1,5-7) + VR (0-19) + FPR (14-31) if used as vector
_properties._numberOfDependencyGPRegisters = 12 + 14 + 5 + 20 + 18;
setOffsetToFirstParm(isBE ? 48 : 32);
_properties._offsetToFirstLocal = isBE?48:32;
}
else
{
if (cg->comp()->target().isAIX())
{
// Volatile GPR (0,2-12) + FPR (0-13) + CCR (0-1,5-7) + VR (0-19) + FPR (14-31) if used as vector
_properties._numberOfDependencyGPRegisters = 12 + 14 + 5 + 20 + 18;
setOffsetToFirstParm(24);
_properties._offsetToFirstLocal = 24;
}
else
{
// Volatile GPR (0,3-12) + FPR (0-13) + CCR (0-1,5-7) + VR (0-19) + FPR (14-31) if used as vector
_properties._numberOfDependencyGPRegisters = 11 + 14 + 5 + 20 + 18;
setOffsetToFirstParm(8);
_properties._offsetToFirstLocal = 8;
}
}
}
const TR::PPCLinkageProperties&
TR::PPCSystemLinkage::getProperties()
{
return _properties;
}
void
TR::PPCSystemLinkage::initPPCRealRegisterLinkage()
{
// Each real register's weight is set to match this linkage convention
TR::Machine *machine = cg()->machine();
int icount;
icount = TR::RealRegister::gr1;
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setState(TR::RealRegister::Locked);
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setAssignedRegister(machine->getRealRegister((TR::RealRegister::RegNum)icount));
icount = TR::RealRegister::gr2;
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setState(TR::RealRegister::Locked);
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setAssignedRegister(machine->getRealRegister((TR::RealRegister::RegNum)icount));
icount = TR::RealRegister::gr13;
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setState(TR::RealRegister::Locked);
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setAssignedRegister(machine->getRealRegister((TR::RealRegister::RegNum)icount));
for (icount=TR::RealRegister::gr3; icount<=TR::RealRegister::gr12;
icount++)
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(icount);
for (icount=TR::RealRegister::LastGPR;
icount>=TR::RealRegister::gr14; icount--)
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(0xf000-icount);
for (icount=TR::RealRegister::FirstFPR;
icount<=TR::RealRegister::fp13; icount++)
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(icount);
for (icount=TR::RealRegister::LastFPR;
icount>=TR::RealRegister::fp14; icount--)
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(0xf000-icount);
for (icount=TR::RealRegister::FirstVRF;
icount<=TR::RealRegister::LastVRF; icount++)
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(icount);
for (icount=TR::RealRegister::FirstCCR;
icount<=TR::RealRegister::LastCCR; icount++)
if (icount>=TR::RealRegister::cr2 && icount<=TR::RealRegister::cr4)
{
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(0xf000-icount);
}
else
{
machine->getRealRegister((TR::RealRegister::RegNum)icount)->setWeight(icount);
}
machine->setNumberOfLockedRegisters(TR_GPR, 3);
machine->setNumberOfLockedRegisters(TR_FPR, 0);
machine->setNumberOfLockedRegisters(TR_VRF, 0);
}
uint32_t
TR::PPCSystemLinkage::getRightToLeft()
{
return getProperties().getRightToLeft();
}
bool
TR::PPCSystemLinkage::hasToBeOnStack(TR::ParameterSymbol *parm)
{
return(parm->getAssignedGlobalRegisterIndex()>=0 && parm->isParmHasToBeOnStack());
}
static bool
hasParmsPassedOnStack(List<TR::ParameterSymbol> &parmList)
{
ListIterator<TR::ParameterSymbol> parmIt(&parmList);
TR::ParameterSymbol *parmCursor = parmIt.getFirst();
while (parmCursor)
{
if (parmCursor->getLinkageRegisterIndex() < 0)
return true;
parmCursor = parmIt.getNext();
}
return false;
}
void
TR::PPCSystemLinkage::mapParameters(
TR::ResolvedMethodSymbol *method,
List<TR::ParameterSymbol> &parmList)
{
uint32_t stackIndex = method->getLocalMappingCursor();
ListIterator<TR::ParameterSymbol> parameterIterator(&parmList);
TR::ParameterSymbol *parmCursor = parameterIterator.getFirst();
const TR::PPCLinkageProperties& linkage = getProperties();
int32_t offsetToFirstParm = self()->getOffsetToFirstParm();
int32_t offset_from_top = 0;
int32_t slot_size = sizeof(uintptr_t);
// The 64-bit ELF V2 ABI Specification makes having a parameter save area optional if all parameters can be passed in
// registers. As a result, we cannot use the caller's parameter save area on 64-bit Linux if all parameters were
// passed in registers. However, we *must* use the caller's parameter save area if one or more parameters were passed
// on the stack to load those values correctly.
bool saveParmsInLocalArea = comp()->target().isLinux() && comp()->target().is64Bit() && !hasParmsPassedOnStack(parmList);
if (linkage.getRightToLeft())
{
while (parmCursor != NULL)
{
if (saveParmsInLocalArea)
parmCursor->setParameterOffset(offset_from_top + stackIndex);
else
parmCursor->setParameterOffset(offset_from_top + offsetToFirstParm + stackIndex);
if (linkage.getSmallIntParmsAlignedRight() && parmCursor->getType().isIntegral() && parmCursor->getSize() < slot_size)
parmCursor->setParameterOffset(parmCursor->getParameterOffset() + slot_size - parmCursor->getSize());
offset_from_top += (parmCursor->getSize() + slot_size - 1) & (~(slot_size - 1));
parmCursor = parameterIterator.getNext();
}
if (saveParmsInLocalArea)
method->setLocalMappingCursor(offset_from_top + stackIndex);
}
else
{
uint32_t sizeOfParameterArea = method->getNumParameterSlots() << 2;
while (parmCursor != NULL)
{
parmCursor->setParameterOffset(sizeOfParameterArea -
offset_from_top -
parmCursor->getSize() + stackIndex +
offsetToFirstParm);
offset_from_top += (parmCursor->getSize() + slot_size - 1) & (~(slot_size - 1));
parmCursor = parameterIterator.getNext();
}
}
}
void
TR::PPCSystemLinkage::mapStack(TR::ResolvedMethodSymbol *method)
{
ListIterator<TR::AutomaticSymbol> automaticIterator(&method->getAutomaticList());
TR::AutomaticSymbol *localCursor = automaticIterator.getFirst();
const TR::PPCLinkageProperties& linkage = getProperties();
TR::Machine *machine = cg()->machine();
uint32_t stackIndex;
int32_t lowGCOffset;
TR::GCStackAtlas *atlas = cg()->getStackAtlas();
// map all garbage collected references together so can concisely represent
// stack maps. They must be mapped so that the GC map index in each local
// symbol is honoured.
stackIndex = mappedOffsetToFirstLocal(cg(), linkage);
lowGCOffset = stackIndex;
// Now map the rest of the locals
//
automaticIterator.reset();
localCursor = automaticIterator.getFirst();
while (localCursor != NULL)
{
mapSingleAutomatic(localCursor, stackIndex);
localCursor = automaticIterator.getNext();
}
method->setScalarTempSlots((stackIndex-lowGCOffset) >> 2);
TR::RealRegister::RegNum regIndex = TR::RealRegister::gr13;
if (!method->isEHAware())
{
while (regIndex<=TR::RealRegister::LastGPR && !machine->getRealRegister(regIndex)->getHasBeenAssignedInMethod())
regIndex = (TR::RealRegister::RegNum)((uint32_t)regIndex+1);
}
stackIndex += (TR::RealRegister::LastGPR-regIndex + 1) * TR::Compiler->om.sizeofReferenceAddress();
// Align the stack frame (previously to 8 bytes, now to 16 for SIMD)
//
const uint32_t alignBytes = 16;
stackIndex = (stackIndex + (alignBytes - 1)) & (~(alignBytes - 1));
regIndex = TR::RealRegister::fp14;
if (!method->isEHAware())
{
while (regIndex<=TR::RealRegister::LastFPR && !machine->getRealRegister(regIndex)->getHasBeenAssignedInMethod())
regIndex = (TR::RealRegister::RegNum)((uint32_t)regIndex + 1);
}
stackIndex += (TR::RealRegister::LastFPR - regIndex + 1) * 8;
method->setLocalMappingCursor(stackIndex);
int32_t offsetToFirstParm = self()->getOffsetToFirstParm();
mapParameters(method, method->getParameterList());
#ifdef __LITTLE_ENDIAN__
// XXX: See the unfortunate hack in mapParameters()
stackIndex = method->getLocalMappingCursor();
#endif
atlas->setParmBaseOffset(atlas->getParmBaseOffset() + offsetToFirstParm + stackIndex);
}
void
TR::PPCSystemLinkage::mapSingleAutomatic(
TR::AutomaticSymbol *p,
uint32_t &stackIndex)
{
size_t align = 1;
size_t size = p->getSize();
if ((size & (size - 1)) == 0 && size <= 8) // if size is power of 2 and small
{
align = size;
}
else if (size > 8)
{
align = 8;
}
if (align > 1)
stackIndex = (stackIndex + align - 1)&(~(align - 1));
p->setOffset(stackIndex);
stackIndex += size;
}
void
TR::PPCSystemLinkage::createPrologue(TR::Instruction *cursor)
{
TR::Node *firstNode = comp()->getStartTree()->getNode();
if (comp()->getOption(TR_EntryBreakPoints))
{
cursor = generateInstruction(cg(), TR::InstOpCode::bad, firstNode, cursor);
}
createPrologue(cursor, comp()->getJittedMethodSymbol()->getParameterList());
}
void
TR::PPCSystemLinkage::createPrologue(
TR::Instruction *cursor,
List<TR::ParameterSymbol> &parmList)
{
TR::Machine *machine = cg()->machine();
const TR::PPCLinkageProperties &properties = getProperties();
TR::ResolvedMethodSymbol *bodySymbol = comp()->getJittedMethodSymbol();
// Stack Pointer Register may currently be set to "alternate"
cg()->setStackPointerRegister(machine->getRealRegister(properties.getNormalStackPointerRegister()));
TR::RealRegister *sp = cg()->getStackPointerRegister();
TR::RealRegister *metaBase = cg()->getMethodMetaDataRegister();
TR::RealRegister *gr2 = machine->getRealRegister(TR::RealRegister::gr2);
TR::RealRegister *gr0 = machine->getRealRegister(TR::RealRegister::gr0);
TR::RealRegister *gr11 = machine->getRealRegister(TR::RealRegister::gr11);
TR::RealRegister *cr0 = machine->getRealRegister(TR::RealRegister::cr0);
TR::Node *firstNode = comp()->getStartTree()->getNode();
TR::RealRegister::RegNum regIndex;
int32_t size = bodySymbol->getLocalMappingCursor();
int32_t argSize;
#ifdef __LITTLE_ENDIAN__
//Move TOCBase into r2
cursor = loadConstant(cg(), firstNode, (int64_t)(cg()->getTOCBase()), gr2, cursor, false, false);
#endif
if (machine->getLinkRegisterKilled())
{
cursor = generateTrg1Instruction(cg(), TR::InstOpCode::mflr, firstNode, gr0, cursor);
}
if (machine->getLinkRegisterKilled())
cursor = generateMemSrc1Instruction(cg(),TR::InstOpCode::Op_st, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, 2*TR::Compiler->om.sizeofReferenceAddress(), TR::Compiler->om.sizeofReferenceAddress()), gr0, cursor);
// Save in-register arguments to the caller frame: this will not be
// necessary if this linkage can be accounted for in the code-gen.
// Force standard saveArguments behaviour by setting fsd=false and saveOnly=false
//cursor = saveArguments(cursor, false, false);
argSize = 0;
TR::RealRegister::RegNum savedFirst=TR::RealRegister::fp14;
if (!bodySymbol->isEHAware())
{
while (savedFirst<=TR::RealRegister::LastFPR && !machine->getRealRegister(savedFirst)->getHasBeenAssignedInMethod())
savedFirst=(TR::RealRegister::RegNum)((uint32_t)savedFirst+1);
}
for (regIndex=TR::RealRegister::LastFPR; regIndex>=savedFirst; regIndex=(TR::RealRegister::RegNum)((uint32_t)regIndex-1))
{
argSize = argSize - 8;
cursor = generateMemSrc1Instruction(cg(), TR::InstOpCode::stfd, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, argSize, 8), machine->getRealRegister(regIndex), cursor);
}
savedFirst = TR::RealRegister::gr13;
if (!bodySymbol->isEHAware())
{
while (savedFirst<=TR::RealRegister::LastGPR && !machine->getRealRegister(savedFirst)->getHasBeenAssignedInMethod())
savedFirst=(TR::RealRegister::RegNum)((uint32_t)savedFirst+1);
}
if (savedFirst <= TR::RealRegister::LastGPR)
{
if (cg()->comp()->target().cpu.is(OMR_PROCESSOR_PPC_GP) || cg()->comp()->target().is64Bit() ||
(!comp()->getOption(TR_OptimizeForSpace) &&
TR::RealRegister::LastGPR - savedFirst <= 3))
for (regIndex=TR::RealRegister::LastGPR; regIndex>=savedFirst; regIndex=(TR::RealRegister::RegNum)((uint32_t)regIndex-1))
{
argSize = argSize - TR::Compiler->om.sizeofReferenceAddress();
cursor = generateMemSrc1Instruction(cg(),TR::InstOpCode::Op_st, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, argSize, TR::Compiler->om.sizeofReferenceAddress()), machine->getRealRegister(regIndex), cursor);
}
else
{
argSize = argSize - (TR::RealRegister::LastGPR - savedFirst + 1) * 4;
cursor = generateMemSrc1Instruction(cg(), (savedFirst==TR::RealRegister::LastGPR)?TR::InstOpCode::stw:TR::InstOpCode::stmw, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, argSize, 4*(TR::RealRegister::LastGPR-savedFirst+1)), machine->getRealRegister(savedFirst), cursor);
}
}
if ( bodySymbol->isEHAware() ||
machine->getRealRegister(TR::RealRegister::cr2)->getHasBeenAssignedInMethod() ||
machine->getRealRegister(TR::RealRegister::cr3)->getHasBeenAssignedInMethod() ||
machine->getRealRegister(TR::RealRegister::cr4)->getHasBeenAssignedInMethod() )
{
cursor = generateTrg1Instruction(cg(), TR::InstOpCode::mfcr, firstNode, gr0, cursor);
cursor = generateMemSrc1Instruction(cg(),TR::InstOpCode::Op_st, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, TR::Compiler->om.sizeofReferenceAddress(), TR::Compiler->om.sizeofReferenceAddress()), gr0, cursor);
}
// If only the link area is needed, a stack frame is unnecessary.
// Some opcodes write into temps above stack, therefore need to allocate
// stack frame if there are any saved non-volatiles
//
if (size > self()->getOffsetToFirstParm() - argSize)
{
if (size > (-LOWER_IMMED))
{
cursor = loadConstant(cg(), firstNode, -size, gr11, cursor);
cursor = generateMemSrc1Instruction(cg(),TR::InstOpCode::Op_stux, firstNode, TR::MemoryReference::createWithIndexReg(cg(), sp, gr11, TR::Compiler->om.sizeofReferenceAddress()), sp, cursor);
}
else
{
cursor = generateMemSrc1Instruction(cg(),TR::InstOpCode::Op_stu, firstNode, TR::MemoryReference::createWithDisplacement(cg(), sp, -size, TR::Compiler->om.sizeofReferenceAddress()), sp, cursor);
}
}
else // leaf routine
{
ListIterator<TR::ParameterSymbol> parameterIterator(&parmList);
TR::ParameterSymbol *parmCursor = parameterIterator.getFirst();
while (parmCursor != NULL)
{
parmCursor->setParameterOffset(parmCursor->getParameterOffset() - size);
parmCursor = parameterIterator.getNext();
}
}
// Force standard saveArguments behaviour by setting fsd=false and saveOnly=false
cursor = saveArguments(cursor, false, false, parmList);
//Preserve JIT pseudo-TOC as required by FrontEnd.
if(cg()->hasCall())
{
cg()->setAppendInstruction(cursor);
TR::TreeEvaluator::preserveTOCRegister(firstNode, cg(), NULL);
}
}
void
TR::PPCSystemLinkage::createEpilogue(TR::Instruction *cursor)
{
TR::Machine *machine = cg()->machine();
const TR::PPCLinkageProperties &properties = getProperties();
TR::ResolvedMethodSymbol *bodySymbol = comp()->getJittedMethodSymbol();
TR::RealRegister *sp = cg()->getStackPointerRegister();
TR::RealRegister *sp2 = sp;
TR::RealRegister *gr0 = machine->getRealRegister(TR::RealRegister::gr0);
TR::RealRegister *gr11 = machine->getRealRegister(TR::RealRegister::gr11);
TR::Node *currentNode = cursor->getNode();
int32_t size = bodySymbol->getLocalMappingCursor();
int32_t saveSize = 0;
TR::Instruction *tempCursor = cursor;
TR::RealRegister::RegNum savedFirst=TR::RealRegister::fp14;
TR::RealRegister::RegNum regIndex;
if (!bodySymbol->isEHAware())
{
while (savedFirst<=TR::RealRegister::LastFPR && !machine->getRealRegister(savedFirst)->getHasBeenAssignedInMethod())
savedFirst=(TR::RealRegister::RegNum)((uint32_t)savedFirst+1);
}
for (regIndex=TR::RealRegister::LastFPR; regIndex>=savedFirst; regIndex=(TR::RealRegister::RegNum)((uint32_t)regIndex-1))
{
saveSize = saveSize - 8;
cursor = generateTrg1MemInstruction(cg(), TR::InstOpCode::lfd, currentNode, machine->getRealRegister(regIndex), TR::MemoryReference::createWithDisplacement(cg(), sp, saveSize, 8), cursor);
}
savedFirst = TR::RealRegister::gr13;
if (!bodySymbol->isEHAware())
{
while (savedFirst<=TR::RealRegister::LastGPR && !machine->getRealRegister(savedFirst)->getHasBeenAssignedInMethod())
savedFirst=(TR::RealRegister::RegNum)((uint32_t)savedFirst+1);
}
if (savedFirst <= TR::RealRegister::LastGPR)
{
if (cg()->comp()->target().cpu.is(OMR_PROCESSOR_PPC_GP) || cg()->comp()->target().is64Bit() ||
(!comp()->getOption(TR_OptimizeForSpace) &&
TR::RealRegister::LastGPR - savedFirst <= 3))
for (regIndex=TR::RealRegister::LastGPR; regIndex>=savedFirst; regIndex=(TR::RealRegister::RegNum)((uint32_t)regIndex-1))
{
saveSize = saveSize - TR::Compiler->om.sizeofReferenceAddress();
cursor = generateTrg1MemInstruction(cg(),TR::InstOpCode::Op_load, currentNode, machine->getRealRegister(regIndex), TR::MemoryReference::createWithDisplacement(cg(), sp, saveSize, TR::Compiler->om.sizeofReferenceAddress()), cursor);
}
else
{
saveSize = saveSize - (TR::RealRegister::LastGPR - savedFirst + 1) * 4;
cursor = generateTrg1MemInstruction(cg(), (savedFirst==TR::RealRegister::LastGPR)?TR::InstOpCode::lwz:TR::InstOpCode::lmw, currentNode, machine->getRealRegister(savedFirst), TR::MemoryReference::createWithDisplacement(cg(), sp, saveSize, 4*(TR::RealRegister::LastGPR-savedFirst+1)), cursor);
}
}
cursor = tempCursor;
// If only the link area is needed, a stack frame is unnecessary.
// Some opcodes write into temps above stack, therefore need to allocate
// stack frame if there are any saved non-volatiles
//
if (size > self()->getOffsetToFirstParm() - saveSize)
{
if (size > UPPER_IMMED)
{
cursor = loadConstant(cg(), currentNode, size, gr11, cursor);
cursor = generateTrg1Src2Instruction(cg(), TR::InstOpCode::add, currentNode, sp, sp2, gr11, cursor);
}
else
{
cursor = generateTrg1Src1ImmInstruction(cg(), TR::InstOpCode::addi2, currentNode, sp, sp2, size, cursor);
}
}
if (machine->getLinkRegisterKilled())
{
cursor = generateTrg1MemInstruction(cg(),TR::InstOpCode::Op_load, currentNode, gr0, TR::MemoryReference::createWithDisplacement(cg(), sp, 2*TR::Compiler->om.sizeofReferenceAddress(), TR::Compiler->om.sizeofReferenceAddress()), cursor);
cursor = generateSrc1Instruction(cg(), TR::InstOpCode::mtlr, currentNode, gr0, 0, cursor);
}
if ( bodySymbol->isEHAware() ||
machine->getRealRegister(TR::RealRegister::cr2)->getHasBeenAssignedInMethod() ||
machine->getRealRegister(TR::RealRegister::cr3)->getHasBeenAssignedInMethod() ||
machine->getRealRegister(TR::RealRegister::cr4)->getHasBeenAssignedInMethod() )
{
cursor = generateTrg1MemInstruction(cg(),TR::InstOpCode::Op_load, currentNode, gr0, TR::MemoryReference::createWithDisplacement(cg(), sp, TR::Compiler->om.sizeofReferenceAddress(), TR::Compiler->om.sizeofReferenceAddress()), cursor);
cursor = generateSrc1Instruction(cg(), TR::InstOpCode::mtcr, currentNode, gr0, 0, cursor);
}
}
int32_t TR::PPCSystemLinkage::buildArgs(TR::Node *callNode,
TR::RegisterDependencyConditions *dependencies)
{
const TR::PPCLinkageProperties &properties = getProperties();
TR::PPCMemoryArgument *pushToMemory = NULL;
TR::Register *tempRegister;
int32_t argIndex = 0, memArgs = 0, i;
int32_t argSize = 0;
uint32_t numIntegerArgs = 0;
uint32_t numFloatArgs = 0;
uint32_t numVectorArgs = 0;
TR::Node *child;
void *smark;
TR::DataType resType = callNode->getType();
TR_Array<TR::Register *> &tempLongRegisters = cg()->getTransientLongRegisters();
TR::Symbol * callSymbol = callNode->getSymbolReference()->getSymbol();
uint32_t firstArgumentChild = callNode->getFirstArgumentIndex();
bool aix_style_linkage = (cg()->comp()->target().isAIX() || (cg()->comp()->target().is64Bit() && cg()->comp()->target().isLinux()));
/* Step 1 - figure out how many arguments are going to be spilled to memory i.e. not in registers */
for (i = firstArgumentChild; i < callNode->getNumChildren(); i++)
{
child = callNode->getChild(i);
switch (child->getDataType())
{
case TR::Int8:
case TR::Int16:
case TR::Int32:
case TR::Address:
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs++;
numIntegerArgs++;
break;
case TR::Int64:
if (cg()->comp()->target().is64Bit())
{
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs++;
numIntegerArgs++;
}
else
{
if (aix_style_linkage)
{
if (numIntegerArgs == properties.getNumIntArgRegs()-1)
memArgs++;
else if (numIntegerArgs > properties.getNumIntArgRegs()-1)
memArgs += 2;
}
else
{
if (numIntegerArgs & 1)
numIntegerArgs++;
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs += 2;
}
numIntegerArgs += 2;
}
break;
case TR::Float:
if (aix_style_linkage)
{
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs++;
numIntegerArgs++;
}
else
{
if (numFloatArgs >= properties.getNumFloatArgRegs())
memArgs++;
}
numFloatArgs++;
break;
case TR::Double:
if (aix_style_linkage)
{
if (cg()->comp()->target().is64Bit())
{
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs++;
numIntegerArgs++;
}
else
{
if (numIntegerArgs >= properties.getNumIntArgRegs()-1)
memArgs++;
numIntegerArgs += 2;
}
}
else
{
if (numFloatArgs >= properties.getNumFloatArgRegs())
memArgs++;
}
numFloatArgs++;
break;
case TR::VectorDouble:
// TODO : finish implementation
numVectorArgs++;
break;
case TR::Aggregate:
{
size_t size = child->getSymbolReference()->getSymbol()->getSize();
size = (size + sizeof(uintptr_t) - 1) & (~(sizeof(uintptr_t) - 1)); // round up the size
size_t slots = size / sizeof(uintptr_t);
if (numIntegerArgs >= properties.getNumIntArgRegs())
memArgs += slots;
else
memArgs += (properties.getNumIntArgRegs() - numIntegerArgs) > slots ? 0: slots - (properties.getNumIntArgRegs() - numIntegerArgs);
numIntegerArgs += slots;
}
break;
default:
TR_ASSERT(false, "Argument type %s is not supported\n", child->getDataType().toString());
}
}
// From here, down, any new stack allocations will expire / die when the function returns
TR::StackMemoryRegion stackMemoryRegion(*trMemory());
/* End result of Step 1 - determined number of memory arguments! */
if (memArgs > 0)
{
pushToMemory = new (trStackMemory()) TR::PPCMemoryArgument[memArgs];
}
numIntegerArgs = 0;
numFloatArgs = 0;
numVectorArgs = 0;
for (i = firstArgumentChild; i < callNode->getNumChildren(); i++)
{
TR::MemoryReference *mref=NULL;
TR::Register *argRegister;
bool checkSplit = true;
child = callNode->getChild(i);
TR::DataType childType = child->getDataType();
switch (childType)
{
case TR::Int8:
case TR::Int16:
case TR::Int32:
case TR::Address: // have to do something for GC maps here
if (childType == TR::Address)
argRegister = pushAddressArg(child);
else
argRegister = pushIntegerWordArg(child);
if (numIntegerArgs < properties.getNumIntArgRegs())
{
if (checkSplit && !cg()->canClobberNodesRegister(child, 0))
{
if (argRegister->containsCollectedReference())
tempRegister = cg()->allocateCollectedReferenceRegister();
else
tempRegister = cg()->allocateRegister();
generateTrg1Src1Instruction(cg(), TR::InstOpCode::mr, callNode, tempRegister, argRegister);
argRegister = tempRegister;