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OpMemToMem.hpp
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OpMemToMem.hpp
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/*******************************************************************************
* Copyright (c) 2000, 2020 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
*******************************************************************************/
#ifndef OPMEMTOMEM_INCL
#define OPMEMTOMEM_INCL
#include <stddef.h>
#include <stdint.h>
#include "codegen/CodeGenerator.hpp"
#include "codegen/InstOpCode.hpp"
#include "codegen/Instruction.hpp"
#include "codegen/Machine.hpp"
#include "codegen/MemoryReference.hpp"
#include "codegen/RegisterPair.hpp"
#include "compile/Compilation.hpp"
#include "env/CompilerEnv.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/DataTypes.hpp"
#include "il/LabelSymbol.hpp"
#include "infra/Assert.hpp"
#include "z/codegen/S390GenerateInstructions.hpp"
namespace TR { class Node; }
namespace TR { class Register; }
namespace TR { class RegisterDependencyConditions; }
namespace TR { class SymbolReference; }
class MemToMemMacroOp
{
public:
virtual TR::Instruction *generate(TR::Register* dstReg,
TR::Register* srcReg,
TR::Register* tmpReg,
int32_t offset,
TR::Instruction *cursor,
TR::MemoryReference *dstMR = NULL,
TR::MemoryReference *srcMR = NULL)
{
TR_ASSERT(offset<=MAXDISP,"MemToMemMacroOp: offset must be less than MAXDISP\n");
TR::Instruction *cursorBefore = cursor;
_dstReg = dstReg;
_srcReg = srcReg;
_tmpReg = tmpReg;
_offset = offset;
_cursor = cursor;
_dstMR = dstMR;
_srcMR = srcMR;
_srcRegTemp = NULL;
_dstRegTemp = NULL;
_litReg = NULL;
TR::Compilation *comp = _cg->comp();
if(cursorBefore == NULL) cursorBefore = comp->cg()->getAppendInstruction();
_cursor = generateLoop();
_cursor = generateRemainder();
// It's possible that no instruction generated by generateLoop and generateRemainder.
// e.g. zero arraylength, if so, we shouldn't set dependency
if (_cursor && (cursorBefore != _cursor))
{
TR::RegisterDependencyConditions * dependencies = generateDependencies();
if (dependencies != 0)
{
_cursor->setDependencyConditions(dependencies);
if(_startControlFlow==NULL)
{
_startControlFlow=cursorBefore->getNext();
if(_startControlFlow->getOpCodeValue() == TR::InstOpCode::ASSOCREGS) _startControlFlow=_startControlFlow->getNext();
}
if(_startControlFlow != _cursor)
{
TR::LabelSymbol * cFlowRegionStart = generateLabelSymbol(_cg);
TR::LabelSymbol * cFlowRegionEnd = generateLabelSymbol(_cg);
generateS390LabelInstruction(_cg, TR::InstOpCode::LABEL, _rootNode, cFlowRegionStart, dependencies, _startControlFlow->getPrev());
cFlowRegionStart->setStartInternalControlFlow();
generateS390LabelInstruction(_cg, TR::InstOpCode::LABEL, _rootNode, cFlowRegionEnd, _cursor->getPrev());
cFlowRegionEnd->setEndInternalControlFlow();
}
}
}
if (_srcRegTemp)
_cg->stopUsingRegister(_srcRegTemp);
if (_dstRegTemp)
_cg->stopUsingRegister(_dstRegTemp);
return _cursor;
}
enum Kind
{
IsNotExtended,
IsMemInit,
IsMemClear,
IsMemCmp,
IsMemCpy,
IsBitOpMem,
numKinds
};
virtual Kind getKind() { return IsNotExtended; }
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg)
{
return generate(dstReg, srcReg, NULL, 0, NULL);
}
virtual TR::Instruction* generate(TR::Register* dstReg)
{
return generate(dstReg, dstReg, NULL, 0, NULL);
}
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* tmpReg, TR::Register* itersReg, int32_t offset, TR::Instruction *cursor)
{
_itersReg = itersReg; // We need to set this reg up explicitly when calling here from the prolog code
return generate(dstReg, srcReg, tmpReg, offset, cursor);
}
virtual TR::Instruction *generate(TR::MemoryReference* dstMR, TR::MemoryReference* srcMR)
{
return generate(NULL, NULL, NULL, 0, NULL, dstMR, srcMR);
}
virtual TR::Instruction *generate(TR::MemoryReference* dstMR)
{
return generate(NULL, NULL, NULL, 0, NULL, dstMR, dstMR);
}
virtual bool setUseEXForRemainder(bool v)
{
return _useEXForRemainder = v;
}
virtual bool useEXForRemainder()
{
return _useEXForRemainder;
}
virtual bool setInRemainder(bool v)
{
return _inRemainder = v;
}
virtual bool inRemainder()
{
return _inRemainder;
}
protected:
MemToMemMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::Node * lenNode, TR::Register * itersReg = 0)
: _rootNode(rootNode), _dstNode(dstNode), _srcNode(srcNode), _cg(cg), _lenNode(lenNode),
_dstReg(0), _srcReg(0), _itersReg(itersReg), _tmpReg(0), _litReg(0), _srcMR(NULL), _dstMR(NULL), _EXTargetLabel(NULL), _offset(0), _cursor(0), _startControlFlow(0),
_useEXForRemainder(false), _inRemainder(false)
{}
virtual TR::Instruction* generateLoop()=0;
virtual TR::Instruction* generateRemainder()=0;
virtual TR::RegisterDependencyConditions* generateDependencies()=0;
virtual TR::Instruction *genSrcLoadAddress(int32_t offset, TR::Instruction *cursor);
virtual TR::Instruction *genDstLoadAddress(int32_t offset, TR::Instruction *cursor);
virtual void generateSrcMemRef(int32_t offset)
{
if (_srcMR==NULL)
{
if (_srcReg!=NULL)
{
_srcMR=new (_cg->trHeapMemory()) TR::MemoryReference(_srcReg, offset, _cg);
}
else
{
_srcMR= generateS390MemoryReference(_cg, _rootNode, _srcNode , offset, true);
}
}
else
{
// Ensure we don't reuse a memref in two different instructions.
_srcMR= generateS390MemoryReference(*_srcMR, 0, _cg);
}
}
virtual void generateDstMemRef(int32_t offset)
{
if (_dstMR==NULL)
{
if (_dstReg!=NULL)
{
_dstMR=new (_cg->trHeapMemory()) TR::MemoryReference(_dstReg, offset, _cg);
}
else
{
_dstMR= generateS390MemoryReference(_cg, _rootNode, _dstNode , offset, true);
}
}
else
{
// Ensure we don't reuse a memref in two different instructions.
_dstMR= generateS390MemoryReference(*_dstMR, 0, _cg);
}
}
TR::Node * _lenNode;
TR::Node* _rootNode;
TR::Node* _srcNode;
TR::Node* _dstNode;
TR::CodeGenerator * _cg;
TR::Register* _srcReg;
TR::Register* _dstReg;
TR::Register* _srcRegTemp;
TR::Register* _dstRegTemp;
TR::Register* _itersReg;
TR::Register* _tmpReg;
TR::Register* _litReg;
TR::MemoryReference * _srcMR;
TR::MemoryReference * _dstMR;
TR::LabelSymbol * _EXTargetLabel;
int32_t _offset;
TR::Instruction* _cursor;
TR::Instruction* _startControlFlow;
bool _useEXForRemainder;
bool _inRemainder;
/** \brief
* Defines the minimum length of the operands that can be encoded by an SS instruction format.
*/
static const int32_t MIN_LENGTH_FOR_SS_INSTRUCTION = 1;
};
class MemToMemConstLenMacroOp : public MemToMemMacroOp
{
public:
bool needsLoop() {return _needsLoop; }
TR::RegisterDependencyConditions *getDependenciesForICF()
{
TR_ASSERT(_inNestedICF, "ICF dependencies were not created");
return _nestedICFDeps;
}
protected:
MemToMemConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, int64_t length,
TR::Register * itersReg=0, TR::InstOpCode::Mnemonic op=TR::InstOpCode::BAD, bool inNestedICF=false)
: MemToMemMacroOp(rootNode, dstNode, srcNode, cg,NULL, itersReg), _length(length), _maxCopies(16), _opcode(op), _needDep(true), _inNestedICF(inNestedICF), _nestedICFDeps(NULL)
{
uint64_t len = (uint64_t)length;
uint64_t largeCopies = (len == 0) ? 0 : (len - 1) / 256;
// Copy early exit logic from MemToMemConstLenMacroOp::generateLoop()
_needsLoop = !(largeCopies < (uint64_t)_maxCopies);
}
virtual TR::Instruction* generateLoop();
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length,TR::Instruction* cursor);
virtual TR::Instruction* generateRemainder();
bool noLoop() {return !_needsLoop; }
void setDependencies(bool needDep)
{
_needDep = needDep;
return;
}
bool needDependencies()
{
return _needDep;
}
int64_t _length;
int32_t _maxCopies; ///< this can be modified - it needs to be less than 16 (addressability)
TR::InstOpCode::Mnemonic _opcode;
bool _needsLoop;
bool _inNestedICF;
TR::RegisterDependencyConditions *_nestedICFDeps;
private:
bool _needDep; ///< Indicates that dependencies are not needed as the copy is done in a non-loop fashion.
};
class MemToMemVarLenMacroOp : public MemToMemMacroOp
{
protected:
MemToMemVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Node * lenNode, bool lengthMinusOne=false, TR::InstOpCode::Mnemonic opcode = TR::InstOpCode::MVC, TR::Register * itersReg = 0, TR::Register * raReg = 0)
: MemToMemMacroOp(rootNode, dstNode, srcNode, cg, lenNode, itersReg), _regLen(regLen), _raReg(raReg), _doneLabel(0), _opcode(opcode), _lengthMinusOne(lengthMinusOne)
{}
virtual TR::Instruction* generateLoop();
virtual TR::Instruction* generateRemainder();
virtual intptr_t getHelper()=0;
virtual TR::SymbolReference* getHelperSymRef()=0;
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length)=0;
TR::Register* _regLen;
TR::Register* _raReg;
TR::LabelSymbol *_doneLabel; ///< set and used for the EXForRemainder case
TR::InstOpCode::Mnemonic _opcode;
bool _lengthMinusOne;
private:
};
class MemInitConstLenMacroOp : public MemToMemConstLenMacroOp
{
public:
MemInitConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, int64_t length, TR::Register* initReg)
: MemToMemConstLenMacroOp(rootNode, dstNode, dstNode, cg, length), _initReg(initReg), _useByteVal(false)
{}
MemInitConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, int64_t length, int8_t byteVal)
: MemToMemConstLenMacroOp(rootNode, dstNode, dstNode, cg, length), _initReg(NULL), _useByteVal(true), _byteVal(byteVal)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length,TR::Instruction* cursor);
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual TR::Instruction* generateLoop();
virtual TR::Instruction* generateRemainder();
private:
TR::Register* _initReg;
bool _useByteVal;
int8_t _byteVal;
};
class MemClearConstLenMacroOp : public MemToMemConstLenMacroOp
{
public:
MemClearConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, int64_t length)
: MemToMemConstLenMacroOp(rootNode, dstNode, dstNode, cg, length)
{}
MemClearConstLenMacroOp(TR::Node* dstNode, int64_t length, TR::CodeGenerator * cg)
: MemToMemConstLenMacroOp(dstNode, dstNode, dstNode, cg, length)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length,TR::Instruction* cursor);
virtual TR::RegisterDependencyConditions* generateDependencies();
private:
};
class MemCmpConstLenMacroOp : public MemToMemConstLenMacroOp
{
public:
MemCmpConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, int64_t length)
: MemToMemConstLenMacroOp(rootNode, dstNode, srcNode, cg, length)
{
_falseLabel = generateLabelSymbol(cg);
_trueLabel = generateLabelSymbol(cg);
_doneLabel = generateLabelSymbol(cg);
}
TR::Register * resultReg() { return _resultReg; }
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* tmpReg, int32_t offset, TR::Instruction *cursor);
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg)
{
return generate(dstReg, srcReg, NULL, 0, NULL);
}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length, TR::Instruction* cursor);
virtual TR::RegisterDependencyConditions* generateDependencies();
TR::LabelSymbol *_falseLabel;
TR::LabelSymbol *_trueLabel;
TR::LabelSymbol *_doneLabel;
TR::Register *_resultReg;
private:
};
class MemCmpConstLenSignMacroOp : public MemCmpConstLenMacroOp
{
public:
MemCmpConstLenSignMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, int64_t length)
: MemCmpConstLenMacroOp(rootNode, dstNode, srcNode, cg, length)
{
_gtLabel = generateLabelSymbol(cg);
}
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* tmpReg, int32_t offset, TR::Instruction *cursor);
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg)
{
return generate(dstReg, srcReg, NULL, 0, NULL);
}
protected:
TR::LabelSymbol *_gtLabel;
};
class MemCpyConstLenMacroOp : public MemToMemConstLenMacroOp
{
public:
MemCpyConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, int64_t length, TR::Register * itersReg=0, bool inNestedICF=false)
: MemToMemConstLenMacroOp(rootNode, dstNode, srcNode, cg, length, itersReg, TR::InstOpCode::MVC, inNestedICF)
{}
MemCpyConstLenMacroOp(TR::Node* dstNode, TR::Node* srcNode, int64_t length, TR::CodeGenerator * cg, TR::Register * itersReg=0, bool inNestedICF=false)
: MemToMemConstLenMacroOp(dstNode, dstNode, srcNode, cg, length, itersReg, TR::InstOpCode::MVC, inNestedICF)
{}
protected:
virtual TR::RegisterDependencyConditions* generateDependencies();
};
class BitOpMemConstLenMacroOp : public MemToMemConstLenMacroOp
{
public:
BitOpMemConstLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::InstOpCode::Mnemonic opcode, int64_t length)
: MemToMemConstLenMacroOp(rootNode, dstNode, srcNode, cg, length, NULL, opcode)
{}
BitOpMemConstLenMacroOp(TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::InstOpCode::Mnemonic opcode, int64_t length)
: MemToMemConstLenMacroOp(dstNode, dstNode, srcNode, cg, length, NULL, opcode)
{}
protected:
virtual TR::RegisterDependencyConditions* generateDependencies();
private:
};
class MemInitVarLenMacroOp : public MemToMemVarLenMacroOp
{
public:
MemInitVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Register* initReg, TR::Node * lenNode, bool lengthMinusOne=false)
: MemToMemVarLenMacroOp(rootNode, dstNode, dstNode, cg, regLen, lenNode, lengthMinusOne), _initReg(initReg), _useByteVal(false), _firstByteInitialized(false), _litPoolReg(NULL)
{}
MemInitVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, TR::Register* regLen, int8_t byteVal, TR::Node * lenNode, bool lengthMinusOne=false)
: MemToMemVarLenMacroOp(rootNode, dstNode, dstNode, cg, regLen, lenNode, lengthMinusOne), _initReg(NULL), _useByteVal(true), _byteVal(byteVal), _firstByteInitialized(false), _litPoolReg(NULL)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length);
virtual intptr_t getHelper();
virtual TR::SymbolReference* getHelperSymRef();
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual TR::Instruction* generateRemainder();
virtual Kind getKind() { return IsMemInit; }
private:
TR::Register* _initReg;
TR::Register *_litPoolReg;
bool _useByteVal;
bool _firstByteInitialized;
int8_t _byteVal;
bool checkLengthAfterLoop() { return true; }
};
class MemClearVarLenMacroOp : public MemToMemVarLenMacroOp
{
public:
MemClearVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Node * lenNode, bool lengthMinusOne=false)
: MemToMemVarLenMacroOp(rootNode, dstNode, dstNode, cg, regLen, lenNode, lengthMinusOne)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length);
virtual intptr_t getHelper();
virtual TR::SymbolReference* getHelperSymRef();
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual TR::Instruction* generateRemainder();
virtual Kind getKind() { return IsMemClear; }
private:
};
class MemCmpVarLenMacroOp : public MemToMemVarLenMacroOp
{
public:
MemCmpVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Node * lenNode, bool lengthMinusOne=false, TR::LabelSymbol * doneLabel = NULL)
: MemToMemVarLenMacroOp(rootNode, dstNode, srcNode, cg, regLen, lenNode, lengthMinusOne, TR::InstOpCode::CLC)
{
_litPoolReg = NULL;
_falseLabel = generateLabelSymbol(cg);
_trueLabel = generateLabelSymbol(cg);
if (!doneLabel)
_doneLabel = generateLabelSymbol(cg);
else
_doneLabel = doneLabel;
}
virtual TR::Instruction * generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* tmpReg, int32_t offset, TR::Instruction *cursor);
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg)
{
return generate(dstReg, srcReg, NULL, 0, NULL);
}
TR::Register * resultReg() { return _resultReg; }
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length);
virtual intptr_t getHelper();
virtual TR::SymbolReference* getHelperSymRef();
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual Kind getKind() { return IsMemCmp; }
TR::LabelSymbol *_falseLabel;
TR::LabelSymbol *_trueLabel;
TR::LabelSymbol *_doneLabel;
TR::Register *_resultReg;
TR::Register *_litPoolReg;
private:
};
class MemCmpVarLenSignMacroOp : public MemCmpVarLenMacroOp
{
public:
MemCmpVarLenSignMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Node * lenNode)
: MemCmpVarLenMacroOp(rootNode, dstNode, srcNode, cg, regLen, lenNode)
{
_gtLabel = generateLabelSymbol(cg);
}
virtual TR::Instruction * generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* tmpReg, int32_t offset, TR::Instruction *cursor);
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg)
{
return generate(dstReg, srcReg, NULL, 0, NULL);
}
virtual Kind getKind() { return IsMemCmp; }
protected:
TR::LabelSymbol *_gtLabel;
};
class MemToMemTypedMacroOp
{
public:
TR_ALLOC(TR_Memory::MemoryReference)
virtual TR::Instruction *generate(TR::Register* dstReg, TR::Register* srcReg, TR::Register* strideReg,bool applyDepLocally=true)
{
TR::Instruction *cursor;
_srcReg = srcReg;
_startReg = dstReg;
_strideReg = strideReg;
_applyDepLocally = applyDepLocally;
_endReg = _cg->allocateRegister();
_bxhReg = _cg->allocateConsecutiveRegisterPair(_startReg, _strideReg);
cursor = generateLoop();
_cg->stopUsingRegister(_endReg);
_cg->stopUsingRegister(_bxhReg);
return cursor;
}
virtual TR::Instruction* generate(TR::Register* dstReg, TR::Register* strideReg, bool applyDepLocally=true)
{
return generate(dstReg, dstReg, strideReg, applyDepLocally);
}
TR::RegisterDependencyConditions* getDependencies() { return _macroDependencies; }
protected:
MemToMemTypedMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::DataType destType, TR::Node * lenNode, bool isForward)
: _rootNode(rootNode), _dstNode(dstNode), _srcNode(srcNode), _cg(cg), _destType(destType),
_startReg(0), _endReg(0), _srcReg(0), _bxhReg(0), _strideReg(0), _macroDependencies(NULL), _lenNode(lenNode), _isForward(isForward)
{}
virtual TR::Instruction* generateLoop()=0;
virtual void createLoopDependencies(TR::Instruction* cursor)=0;
TR::Node * _lenNode;
TR::Node* _rootNode;
TR::Node* _srcNode;
TR::Node* _dstNode;
TR::CodeGenerator * _cg;
TR::RegisterPair* _bxhReg;
TR::Register* _srcReg;
TR::Register* _startReg;
TR::Register* _endReg;
TR::Register* _strideReg;
TR::DataType _destType;
bool _applyDepLocally;
bool _isForward;
TR::RegisterDependencyConditions* _macroDependencies;
private:
};
class MemCpyVarLenMacroOp : public MemToMemVarLenMacroOp
{
public:
MemCpyVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::Register* regLen, TR::Node * lenNode, bool lengthMinusOne=false, TR::Register * itersReg=0, TR::Register * raReg=0)
: MemToMemVarLenMacroOp(rootNode, dstNode, srcNode, cg, regLen, lenNode, lengthMinusOne, TR::InstOpCode::MVC, itersReg, raReg)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length);
virtual intptr_t getHelper();
virtual TR::SymbolReference* getHelperSymRef();
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual Kind getKind() { return IsMemCpy; }
private:
};
class BitOpMemVarLenMacroOp : public MemToMemVarLenMacroOp
{
public:
BitOpMemVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::InstOpCode::Mnemonic opcode, TR::Register* regLen, TR::Node * lenNode, bool lengthMinusOne=false)
: MemToMemVarLenMacroOp(rootNode, dstNode, srcNode, cg, regLen, lenNode, lengthMinusOne, opcode)
{}
protected:
virtual TR::Instruction* generateInstruction(int32_t offset, int64_t length);
virtual intptr_t getHelper();
virtual TR::SymbolReference* getHelperSymRef();
virtual TR::RegisterDependencyConditions* generateDependencies();
virtual Kind getKind() { return IsBitOpMem; }
private:
};
class MemToMemTypedVarLenMacroOp : public MemToMemTypedMacroOp
{
public:
protected:
MemToMemTypedVarLenMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::DataType destType, TR::Register* lenReg, TR::Node * lenNode, bool isForward = false)
: MemToMemTypedMacroOp(rootNode, dstNode, srcNode, cg, destType, lenNode, isForward), _lenReg(lenReg)
{}
virtual TR::Instruction* generateLoop();
virtual TR::Instruction* generateInstruction()=0;
int32_t strideSize();
int32_t shiftSize();
int32_t numCoreDependencies();
TR::RegisterDependencyConditions* addCoreDependencies(TR::RegisterDependencyConditions* baseDependencies);
TR::Register* _lenReg;
private:
};
class MemInitVarLenTypedMacroOp : public MemToMemTypedVarLenMacroOp
{
public:
MemInitVarLenTypedMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::CodeGenerator * cg, TR::DataType destType, TR::Register* lenReg, TR::Register* initReg, TR::Node * lenNode, bool isForward = false)
: MemToMemTypedVarLenMacroOp(rootNode, dstNode, dstNode, cg, destType, lenReg, lenNode, isForward), _initReg(initReg)
{}
protected:
virtual TR::Instruction* generateInstruction();
virtual void createLoopDependencies(TR::Instruction* cursor);
private:
TR::Register* _initReg;
};
class MemCpyVarLenTypedMacroOp : public MemToMemTypedVarLenMacroOp
{
public:
MemCpyVarLenTypedMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::DataType destType, TR::Register* lenReg, TR::Node * lenNode, bool needsGuardedLoad, bool isForward = false)
: _needsGuardedLoad(needsGuardedLoad),
MemToMemTypedVarLenMacroOp(rootNode, dstNode, srcNode, cg, destType, lenReg, lenNode, isForward)
{
allocWorkReg();
}
void cleanUpReg()
{
_cg->stopUsingRegister(_workReg);
}
protected:
virtual TR::Instruction* generateInstruction();
virtual void createLoopDependencies(TR::Instruction* cursor);
private:
void allocWorkReg();
TR::Register* _workReg;
bool _needsGuardedLoad;
};
class MemCpyAtomicMacroOp: public MemToMemTypedVarLenMacroOp
{
public:
MemCpyAtomicMacroOp(TR::Node* rootNode, TR::Node* dstNode, TR::Node* srcNode, TR::CodeGenerator * cg, TR::DataType destType, TR::Register* lenReg, TR::Node * lenNode, bool isForward=false, bool unroll=false, int32_t constLength=-1);
// Add getters for registers, so that can be shared with MVC routine in arraycopyEvaluator
TR::Register * getAlignedReg() { return _alignedReg; };
TR::Register * getWorkReg() { return _workReg; };
TR::Instruction* generateLoop();
TR::Instruction * generateConstLoop(TR::InstOpCode::Mnemonic, TR::InstOpCode::Mnemonic);
TR::Instruction * generateSTXLoop(int32_t, TR::InstOpCode::Mnemonic, TR::InstOpCode::Mnemonic, bool unroll);
TR::Instruction * generateSTXLoopLabel(TR::LabelSymbol *, TR::LabelSymbol *, int32_t, TR::InstOpCode::Mnemonic, TR::InstOpCode::Mnemonic);
TR::Instruction * generateOneSTXthenSTYLoopLabel(TR::LabelSymbol *, TR::LabelSymbol *, int32_t, TR::InstOpCode::Mnemonic, TR::InstOpCode::Mnemonic, int32_t, TR::InstOpCode::Mnemonic, TR::InstOpCode::Mnemonic);
void cleanUpReg()
{
if (_trace)
traceMsg(_cg->comp(), "MemCpyAtomicMacroOp: cleanUpReg\n");
_cg->stopUsingRegister(_workReg);
_cg->stopUsingRegister(_alignedReg);
if (_unroll && _isForward)
{
if (_unrollFactor)
{
switch (_unrollFactor)
{
case 8:
_cg->stopUsingRegister(_workReg8);
case 7:
_cg->stopUsingRegister(_workReg7);
case 6:
_cg->stopUsingRegister(_workReg6);
case 5:
_cg->stopUsingRegister(_workReg5);
case 4:
_cg->stopUsingRegister(_workReg4);
case 3:
_cg->stopUsingRegister(_workReg3);
case 2:
_cg->stopUsingRegister(_workReg2);
}
}
}
}
protected:
virtual TR::Instruction* generateInstruction(TR::InstOpCode::Mnemonic , TR::InstOpCode::Mnemonic , TR::Register * , int32_t );
virtual TR::Instruction* generateInstruction( );
virtual void createLoopDependencies(TR::Instruction* cursor);
private:
bool _unroll;
bool _trace;
int32_t _constLength;
int32_t _unrollFactor;
void allocWorkReg();
TR::Register* _workReg;
TR::Register* _alignedReg;
TR::Register* _workReg2;
TR::Register* _workReg3;
TR::Register* _workReg4;
TR::Register* _workReg5;
TR::Register* _workReg6;
TR::Register* _workReg7;
TR::Register* _workReg8;
};
#endif