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FPTreeEvaluator.cpp
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FPTreeEvaluator.cpp
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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
*******************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include "codegen/CodeGenerator.hpp"
#include "codegen/CodeGeneratorUtils.hpp"
#include "env/FrontEnd.hpp"
#include "codegen/InstOpCode.hpp"
#include "codegen/Instruction.hpp"
#include "codegen/Linkage.hpp"
#include "codegen/Linkage_inlines.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/RegisterDependencyStruct.hpp"
#include "codegen/RegisterPair.hpp"
#include "codegen/TreeEvaluator.hpp"
#include "codegen/UnresolvedDataSnippet.hpp"
#include "compile/Compilation.hpp"
#include "compile/SymbolReferenceTable.hpp"
#include "env/CompilerEnv.hpp"
#include "env/Processors.hpp"
#include "env/TRMemory.hpp"
#include "env/jittypes.h"
#include "il/DataTypes.hpp"
#include "il/ILOpCodes.hpp"
#include "il/ILOps.hpp"
#include "il/LabelSymbol.hpp"
#include "il/MethodSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/Symbol.hpp"
#include "il/SymbolReference.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "infra/Assert.hpp"
#include "p/codegen/GenerateInstructions.hpp"
#include "p/codegen/LoadStoreHandler.hpp"
#include "p/codegen/PPCInstruction.hpp"
#include "p/codegen/PPCTableOfConstants.hpp"
#include "runtime/Runtime.hpp"
static void ifFloatEvaluator( TR::Node *node, TR::InstOpCode::Mnemonic branchOp1, TR::InstOpCode::Mnemonic branchOp2, TR::CodeGenerator *cg);
static TR::Register *singlePrecisionEvaluator(TR::Node *node, TR::InstOpCode::Mnemonic OpCode, TR::CodeGenerator *cg);
static TR::Register *doublePrecisionEvaluator(TR::Node *node, TR::InstOpCode::Mnemonic OpCode, TR::CodeGenerator *cg);
TR::Register *OMR::Power::TreeEvaluator::ibits2fEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateSinglePrecisionRegister();
if (child->getRegister() == NULL && child->getReferenceCount() == 1 && child->getOpCode().isLoadVar())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, child, TR::InstOpCode::lfs, 4);
}
else
{
generateMvFprGprInstructions(cg, node, gprSp2fpr, cg->comp()->target().is64Bit(), trgReg, cg->evaluate(child));
cg->decReferenceCount(child);
}
node->setRegister(trgReg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::fbits2iEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister();
if (child->getRegister() == NULL && child->getReferenceCount() == 1 && child->getOpCode().isLoadVar() && !node->normalizeNanValues())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, child, TR::InstOpCode::lwz, 4);
}
else
{
TR::Register *floatReg = cg->comp()->target().cpu.isAtLeast(OMR_PROCESSOR_PPC_P8) ? cg->gprClobberEvaluate(child) : cg->evaluate(child);
generateMvFprGprInstructions(cg, node, fpr2gprSp, cg->comp()->target().is64Bit(), trgReg, floatReg);
if (node->normalizeNanValues())
{
TR::Register *condReg = cg->allocateRegister(TR_CCR);
TR::LabelSymbol *nanNormalizeStartLabel = generateLabelSymbol(cg);
TR::LabelSymbol *nanNormalizeEndLabel = generateLabelSymbol(cg);
nanNormalizeStartLabel->setStartInternalControlFlow();
nanNormalizeEndLabel->setEndInternalControlFlow();
TR::RegisterDependencyConditions *deps = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(0, 2, cg->trMemory());
deps->addPostCondition(condReg, TR::RealRegister::NoReg);
deps->addPostCondition(trgReg, TR::RealRegister::NoReg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::fcmpu, node, condReg, floatReg, floatReg);
generateLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeStartLabel);
generateConditionalBranchInstruction(cg, TR::InstOpCode::beq, PPCOpProp_BranchLikely, node, nanNormalizeEndLabel, condReg);
generateTrg1ImmInstruction(cg, TR::InstOpCode::lis, node, trgReg, 0x7fc0);
generateDepLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeEndLabel, deps);
cg->stopUsingRegister(condReg);
}
if (floatReg != child->getRegister())
cg->stopUsingRegister(floatReg);
cg->decReferenceCount(child);
}
node->setRegister(trgReg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::lbits2dEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister(TR_FPR);
if (child->getRegister() == NULL && child->getReferenceCount() == 1 && child->getOpCode().isLoadVar())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, child, TR::InstOpCode::lfd, 8);
}
else if (cg->comp()->target().is64Bit())
{
generateMvFprGprInstructions(cg, node, gpr2fprHost64, true, trgReg, cg->evaluate(child));
cg->decReferenceCount(child);
}
else
{
TR::Register *longReg = cg->evaluate(child);
TR::Register *tempReg = cg->comp()->target().cpu.isAtLeast(OMR_PROCESSOR_PPC_P8) ? cg->allocateRegister(TR_FPR) : NULL;
generateMvFprGprInstructions(cg, node, gpr2fprHost32, false, trgReg, longReg->getHighOrder(), longReg->getLowOrder(), tempReg);
if (tempReg)
cg->stopUsingRegister(tempReg);
cg->decReferenceCount(child);
}
node->setRegister(trgReg);
return trgReg;
}
TR::Register *dbits2l32Evaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegisterPair(cg->allocateRegister(), cg->allocateRegister());
if (child->getOpCode().isLoadVar() && !child->getRegister() && child->getReferenceCount() == 1 && !node->normalizeNanValues())
{
TR::LoadStoreHandler::generatePairedLoadNodeSequence(cg, trgReg, child);
}
else
{
TR::Register *doubleReg = cg->evaluate(child);
TR::Register *tempReg = cg->comp()->target().cpu.isAtLeast(OMR_PROCESSOR_PPC_P8) ? cg->allocateRegister(TR_FPR) : NULL;
generateMvFprGprInstructions(cg, node, fpr2gprHost32, false, trgReg->getHighOrder(), trgReg->getLowOrder(), doubleReg, tempReg);
if (tempReg)
cg->stopUsingRegister(tempReg);
if (node->normalizeNanValues())
{
TR::Register *condReg = cg->allocateRegister(TR_CCR);
TR::LabelSymbol *nanNormalizeStartLabel = generateLabelSymbol(cg);
TR::LabelSymbol *nanNormalizeEndLabel = generateLabelSymbol(cg);
TR::RegisterDependencyConditions *deps = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(3, 3, cg->trMemory());
TR::addDependency(deps, condReg, TR::RealRegister::NoReg, TR_CCR, cg);
TR::addDependency(deps, trgReg->getLowOrder(), TR::RealRegister::NoReg, TR_GPR, cg);
TR::addDependency(deps, trgReg->getHighOrder(), TR::RealRegister::NoReg, TR_GPR, cg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::fcmpu, node, condReg, doubleReg, doubleReg);
generateLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeStartLabel);
generateConditionalBranchInstruction(cg, TR::InstOpCode::beq, PPCOpProp_BranchLikely, node, nanNormalizeEndLabel, condReg);
generateTrg1ImmInstruction(cg, TR::InstOpCode::lis, node, trgReg->getHighOrder(), 0x7ff8);
generateTrg1ImmInstruction(cg, TR::InstOpCode::li, node, trgReg->getLowOrder(), 0);
generateDepLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeEndLabel, deps);
cg->stopUsingRegister(condReg);
}
cg->decReferenceCount(child);
}
node->setRegister(trgReg);
return trgReg;
}
TR::Register *dbits2l64Evaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
TR::Register *trgReg = cg->allocateRegister();
if (child->getRegister() == NULL && child->getReferenceCount() == 1 && child->getOpCode().isLoadVar() && !node->normalizeNanValues())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, child, TR::InstOpCode::ld, 8);
}
else
{
TR::Register *doubleReg = cg->evaluate(child);
generateMvFprGprInstructions(cg, node, fpr2gprHost64, true, trgReg, doubleReg);
if (node->normalizeNanValues())
{
TR::Register *condReg = cg->allocateRegister(TR_CCR);
TR::LabelSymbol *nanNormalizeStartLabel = generateLabelSymbol(cg);
TR::LabelSymbol *nanNormalizeEndLabel = generateLabelSymbol(cg);
TR::RegisterDependencyConditions *deps = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(2, 2, cg->trMemory());
TR::addDependency(deps, condReg, TR::RealRegister::NoReg, TR_CCR, cg);
TR::addDependency(deps, trgReg, TR::RealRegister::NoReg, TR_GPR, cg);
generateTrg1Src2Instruction(cg, TR::InstOpCode::fcmpu, node, condReg, doubleReg, doubleReg);
generateLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeStartLabel);
generateConditionalBranchInstruction(cg, TR::InstOpCode::beq, PPCOpProp_BranchLikely, node, nanNormalizeEndLabel, condReg);
loadConstant(cg, node, (int64_t)CONSTANT64(0x7ff8000000000000), trgReg);
generateDepLabelInstruction(cg, TR::InstOpCode::label, node, nanNormalizeEndLabel, deps);
cg->stopUsingRegister(condReg);
}
cg->decReferenceCount(child);
}
node->setRegister(trgReg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::dbits2lEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
if (cg->comp()->target().is64Bit())
return dbits2l64Evaluator(node, cg);
else
return dbits2l32Evaluator(node, cg);
}
static TR::Register *fconstHandler(TR::Node *node, TR::CodeGenerator *cg, float value)
{
TR::Register *trgRegister = cg->allocateSinglePrecisionRegister();
loadFloatConstant(cg, TR::InstOpCode::lfs, node, TR::Float, &value, trgRegister);
node->setRegister(trgRegister);
return trgRegister;
}
TR::Register *OMR::Power::TreeEvaluator::fconstEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
return fconstHandler(node, cg, node->getFloat());
}
TR::Register *OMR::Power::TreeEvaluator::dconstEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
double value = node->getDouble();
TR::Compilation *comp = cg->comp();
TR::Register *trgRegister = cg->allocateRegister(TR_FPR);
loadFloatConstant(cg, TR::InstOpCode::lfd, node, TR::DataTypes::Double, &value, trgRegister);
node->setRegister(trgRegister);
return trgRegister;
}
// also handles TR::floadi
TR::Register *OMR::Power::TreeEvaluator::floadEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg = cg->allocateSinglePrecisionRegister();
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, node, TR::InstOpCode::lfs, 4);
node->setRegister(trgReg);
return trgReg;
}
// also handles TR::dloadi
TR::Register *OMR::Power::TreeEvaluator::dloadEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg = cg->allocateRegister(TR_FPR);
TR::LoadStoreHandler::generateLoadNodeSequence(cg, trgReg, node, TR::InstOpCode::lfd, 8);
node->setRegister(trgReg);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::vsplatsEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child = node->getFirstChild();
static bool disableDirectMove = feGetEnv("TR_disableDirectMove") ? true : false;
if (node->getDataType() == TR::VectorInt8)
{
TR::SymbolReference *temp = cg->allocateLocalTemp(TR::VectorInt8);
TR::MemoryReference *tempMR = TR::MemoryReference::createWithSymRef(cg, node, temp, 1);
TR::Register *srcReg = cg->evaluate(child);
generateMemSrc1Instruction(cg, TR::InstOpCode::stb, node, tempMR, srcReg);
TR::Register *tmpReg = cg->allocateRegister();
generateTrg1MemInstruction(cg, TR::InstOpCode::addi2, node, tmpReg, tempMR);
tempMR = TR::MemoryReference::createWithIndexReg(cg, NULL, tmpReg, 16);
cg->stopUsingRegister(tmpReg);
TR::Register *trgReg = cg->allocateRegister(TR_VRF);
generateTrg1MemInstruction(cg, TR::InstOpCode::lxvd2x, node, trgReg, tempMR);
#if defined(__LITTLE_ENDIAN__)
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::vspltb, node, trgReg, trgReg, 7);
#else
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::vspltb, node, trgReg, trgReg, 0);
#endif
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else if (node->getDataType() == TR::VectorInt16)
{
TR::SymbolReference *temp = cg->allocateLocalTemp(TR::VectorInt16);
TR::MemoryReference *tempMR = TR::MemoryReference::createWithSymRef(cg, node, temp, 2);
TR::Register *srcReg = cg->evaluate(child);
generateMemSrc1Instruction(cg, TR::InstOpCode::sth, node, tempMR, srcReg);
TR::Register *tmpReg = cg->allocateRegister();
generateTrg1MemInstruction(cg, TR::InstOpCode::addi2, node, tmpReg, tempMR);
tempMR = TR::MemoryReference::createWithIndexReg(cg, NULL, tmpReg, 16);
cg->stopUsingRegister(tmpReg);
TR::Register *trgReg = cg->allocateRegister(TR_VRF);
generateTrg1MemInstruction(cg, TR::InstOpCode::lxvd2x, node, trgReg, tempMR);
#if defined(__LITTLE_ENDIAN__)
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::vsplth, node, trgReg, trgReg, 3);
#else
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::vsplth, node, trgReg, trgReg, 0);
#endif
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else if (node->getDataType() == TR::VectorInt32)
{
TR::Register *tempReg = cg->evaluate(child);
TR::Register *resReg = cg->allocateRegister(TR_VRF);
if (!disableDirectMove && cg->comp()->target().cpu.isAtLeast(OMR_PROCESSOR_PPC_P8) && cg->comp()->target().cpu.supportsFeature(OMR_FEATURE_PPC_HAS_VSX))
{
generateMvFprGprInstructions(cg, node, gprLow2fpr, false, resReg, tempReg);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::xxspltw, node, resReg, resReg, 0x1);
}
else
{
TR::SymbolReference *localTemp = cg->allocateLocalTemp(TR::Int32);
generateMemSrc1Instruction(cg, TR::InstOpCode::stw, node, TR::MemoryReference::createWithSymRef(cg, node, localTemp, 4), tempReg);
TR::MemoryReference *tempMR = TR::MemoryReference::createWithSymRef(cg, node, localTemp, 4);
tempMR->forceIndexedForm(node, cg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lxsdx, node, resReg, tempMR);
tempMR->decNodeReferenceCounts(cg);
#if defined(__LITTLE_ENDIAN__)
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::xxspltw, node, resReg, resReg, 1);
#else
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::xxspltw, node, resReg, resReg, 0);
#endif
}
cg->stopUsingRegister(tempReg);
node->setRegister(resReg);
cg->decReferenceCount(child);
return resReg;
}
else if (node->getDataType() == TR::VectorInt64)
{
TR::Register *srcReg = cg->evaluate(child);
TR::Register *trgReg = cg->allocateRegister(TR_VRF);
if (!disableDirectMove && cg->comp()->target().cpu.isAtLeast(OMR_PROCESSOR_PPC_P8) && cg->comp()->target().cpu.supportsFeature(OMR_FEATURE_PPC_HAS_VSX))
{
if (cg->comp()->target().is64Bit())
{
generateMvFprGprInstructions(cg, node, gpr2fprHost64, false, trgReg, srcReg);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, trgReg, trgReg, trgReg, 0x0);
}
else
{
TR::Register *tempVectorReg = cg->allocateRegister(TR_VSX_VECTOR);
generateMvFprGprInstructions(cg, node, gpr2fprHost32, false, trgReg, srcReg->getHighOrder(), srcReg->getLowOrder(), tempVectorReg);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, trgReg, trgReg, trgReg, 0x0);
cg->stopUsingRegister(tempVectorReg);
}
}
else
{
TR::SymbolReference *temp = cg->allocateLocalTemp(TR::Int64);
TR::MemoryReference *tempMR = TR::MemoryReference::createWithSymRef(cg, node, temp, 8);
if (cg->comp()->target().is64Bit())
{
generateMemSrc1Instruction(cg, TR::InstOpCode::std, node, tempMR, srcReg);
}
else
{
TR::MemoryReference *tempMR2 = TR::MemoryReference::createWithMemRef(cg, node, *tempMR, 4, 4);
generateMemSrc1Instruction(cg, TR::InstOpCode::stw, node, tempMR, srcReg->getHighOrder());
generateMemSrc1Instruction(cg, TR::InstOpCode::stw, node, tempMR2, srcReg->getLowOrder());
}
TR::Register *tmpReg = cg->allocateRegister();
generateTrg1MemInstruction(cg, TR::InstOpCode::addi2, node, tmpReg, tempMR);
tempMR = TR::MemoryReference::createWithIndexReg(cg, NULL, tmpReg, 16);
cg->stopUsingRegister(tmpReg);
generateTrg1MemInstruction(cg, TR::InstOpCode::lxvdsx, node, trgReg, tempMR);
}
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
else if (node->getDataType() == TR::VectorFloat)
{
TR::Register *srcReg = cg->evaluate(child);
TR::Register *trgReg = cg->allocateRegister(TR_VRF);
generateTrg1Src1Instruction(cg, TR::InstOpCode::xscvdpsp, node, trgReg, srcReg);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::xxspltw, node, trgReg, trgReg, 0);
node->setRegister(trgReg);
cg->decReferenceCount(child);
return trgReg;
}
TR_ASSERT(node->getDataType() == TR::VectorDouble, "unsupported splats type");
TR::Register *resReg = node->setRegister(cg->allocateRegister(TR_VSX_VECTOR));
if (child->getOpCode().isLoadConst())
{
double value = child->getDouble();
loadFloatConstant(cg, TR::InstOpCode::lxvdsx, node, TR::DataTypes::Double, &value, resReg);
cg->decReferenceCount(child);
return resReg;
}
else if (!child->getRegister() && child->getReferenceCount() == 1 && child->getOpCode().isLoadVar())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, resReg, child, TR::InstOpCode::lxvdsx, 8, true);
return resReg;
}
else
{
TR::Register *srcReg = cg->evaluate(child);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, resReg, srcReg, srcReg, 0x0);
cg->decReferenceCount(child);
return resReg;
}
return NULL;
}
TR::Register *OMR::Power::TreeEvaluator::vdgetelemEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *firstChild = node->getFirstChild();
TR::Node *secondChild = node->getSecondChild();
TR::Register *resReg = node->setRegister(cg->allocateRegister(TR_FPR));
if (secondChild->getOpCode().isLoadConst())
{
int elem = secondChild->getInt();
TR_ASSERT(elem == 0 || elem == 1, "Element can only be 0 or 1\n");
TR::Register *srcReg = cg->evaluate(firstChild);
if (elem == 1)
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxsldwi, node, resReg, srcReg, srcReg, 0x2);
else
generateTrg1Src2Instruction(cg, TR::InstOpCode::xxlor, node, resReg, srcReg, srcReg);
cg->decReferenceCount(firstChild);
cg->decReferenceCount(secondChild);
return resReg;
}
TR::Register *vectorReg = cg->evaluate(firstChild);
TR::Register *idxReg = cg->evaluate(secondChild);
TR::Register *condReg = cg->allocateRegister(TR_CCR);
TR::LabelSymbol *jumpLabel = generateLabelSymbol(cg);
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::cmpi4, node, condReg, idxReg, 0);
// copy vector register to result register
generateTrg1Src2Instruction(cg, TR::InstOpCode::xxlor, node, resReg, vectorReg, vectorReg);
generateConditionalBranchInstruction(cg, TR::InstOpCode::beq, node, jumpLabel, condReg);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxsldwi, node, resReg, vectorReg, vectorReg, 0x2);
TR::RegisterDependencyConditions *dep = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(0, 4, cg->trMemory());
dep->addPostCondition(vectorReg, TR::RealRegister::NoReg);
dep->addPostCondition(idxReg, TR::RealRegister::NoReg);
dep->addPostCondition(resReg, TR::RealRegister::NoReg);
dep->addPostCondition(condReg, TR::RealRegister::NoReg);
generateDepLabelInstruction(cg, TR::InstOpCode::label, node, jumpLabel, dep);
cg->stopUsingRegister(condReg);
cg->decReferenceCount(firstChild);
cg->decReferenceCount(secondChild);
return resReg;
}
TR::Register *OMR::Power::TreeEvaluator::vdsetelemEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *firstChild = node->getFirstChild();
TR::Node *secondChild = node->getSecondChild();
TR::Node *thirdChild = node->getThirdChild();
TR::Register *vectorReg = cg->evaluate(firstChild);
TR::Register *resReg = node->setRegister(cg->allocateRegister(TR_VSX_VECTOR));
if (thirdChild->getOpCode().isLoadConst())
{
int elem = thirdChild->getInt();
TR_ASSERT(elem == 0 || elem == 1, "Element can only be 0 or 1\n");
if (!secondChild->getRegister() && secondChild->getReferenceCount() == 1 && secondChild->getOpCode().isLoadVar())
{
TR::LoadStoreHandler::generateLoadNodeSequence(cg, resReg, secondChild, TR::InstOpCode::lxsdx, 8, true);
}
else
{
TR::Register *fprReg = cg->evaluate(secondChild);
generateTrg1Src2Instruction(cg, TR::InstOpCode::xxlor, node, resReg, fprReg, fprReg);
cg->decReferenceCount(secondChild);
}
if (elem == 0)
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, resReg, resReg, vectorReg, 0x1);
else
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, resReg, vectorReg, resReg, 0x0);
cg->decReferenceCount(firstChild);
cg->decReferenceCount(thirdChild);
return resReg;
}
TR::Register *idxReg = cg->evaluate(secondChild);
TR::Register *valueReg = cg->evaluate(thirdChild);
TR::Register *condReg = cg->allocateRegister(TR_CCR);
TR::LabelSymbol *doneLabel = generateLabelSymbol(cg);
// cmpwi index, 0
// xxpermdi result, value, vector, 1
// beq 1f
// xxmrghd result, vector, value
// 1:
generateTrg1Src1ImmInstruction(cg, TR::InstOpCode::cmpi4, node, condReg, idxReg, 0);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, resReg, valueReg, vectorReg, 0x1);
generateConditionalBranchInstruction(cg, TR::InstOpCode::beq, node, doneLabel, condReg);
generateTrg1Src2ImmInstruction(cg, TR::InstOpCode::xxpermdi, node, resReg, vectorReg, valueReg, 0x0);
TR::RegisterDependencyConditions *dep = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(0, 5, cg->trMemory());
dep->addPostCondition(vectorReg, TR::RealRegister::NoReg);
dep->addPostCondition(idxReg, TR::RealRegister::NoReg);
dep->addPostCondition(valueReg, TR::RealRegister::NoReg);
dep->addPostCondition(resReg, TR::RealRegister::NoReg);
dep->addPostCondition(condReg, TR::RealRegister::NoReg);
generateDepLabelInstruction(cg, TR::InstOpCode::label, node, doneLabel, dep);
cg->stopUsingRegister(condReg);
cg->decReferenceCount(firstChild);
cg->decReferenceCount(secondChild);
cg->decReferenceCount(thirdChild);
return resReg;
}
// Also handles fstorei
TR::Register *OMR::Power::TreeEvaluator::fstoreEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *srcChild = node->getOpCode().isIndirect() ? node->getSecondChild() : node->getFirstChild();
if (!srcChild->getRegister() && srcChild->getReferenceCount() == 1 && srcChild->getOpCodeValue() == TR::ibits2f)
{
TR::Register *srcReg = cg->evaluate(srcChild->getFirstChild());
TR::LoadStoreHandler::generateStoreNodeSequence(cg, srcReg, node, TR::InstOpCode::stw, 4);
cg->decReferenceCount(srcChild->getFirstChild());
}
else
{
TR::Register *srcReg = cg->evaluate(srcChild);
TR::LoadStoreHandler::generateStoreNodeSequence(cg, srcReg, node, TR::InstOpCode::stfs, 4);
}
cg->decReferenceCount(srcChild);
return NULL;
}
// Also handles dstorei
TR::Register *OMR::Power::TreeEvaluator::dstoreEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *srcChild = node->getOpCode().isIndirect() ? node->getSecondChild() : node->getFirstChild();
if (!srcChild->getRegister() && srcChild->getReferenceCount() == 1 && srcChild->getOpCodeValue() == TR::lbits2d)
{
TR::Register *srcReg = cg->evaluate(srcChild->getFirstChild());
if (cg->comp()->target().is64Bit())
TR::LoadStoreHandler::generateStoreNodeSequence(cg, srcReg, node, TR::InstOpCode::std, 8);
else
TR::LoadStoreHandler::generatePairedStoreNodeSequence(cg, srcReg, node);
cg->decReferenceCount(srcChild->getFirstChild());
}
else
{
TR::Register *srcReg = cg->evaluate(srcChild);
TR::LoadStoreHandler::generateStoreNodeSequence(cg, srcReg, node, TR::InstOpCode::stfd, 8);
}
cg->decReferenceCount(srcChild);
return NULL;
}
//Handles both freturn and dreturn
TR::Register *OMR::Power::TreeEvaluator::freturnEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
bool isDouble = node->getOpCodeValue() == TR::dreturn;
TR::Register *returnRegister = cg->evaluate(node->getFirstChild());
const TR::PPCLinkageProperties &linkageProperties = cg->getProperties();
TR::RealRegister::RegNum machineReturnRegister =
linkageProperties.getFloatReturnRegister();
TR::RegisterDependencyConditions *dependencies = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(1, 0, cg->trMemory());
dependencies->addPreCondition(returnRegister, machineReturnRegister);
generateAdminInstruction(cg, TR::InstOpCode::ret, node);
generateDepInstruction(cg, TR::InstOpCode::blr, node, dependencies);
cg->decReferenceCount(node->getFirstChild());
return NULL;
}
// return true if mul node is marked appropriately and not shared.
//
static bool isFPStrictMul(TR::Node *node, TR::Compilation * comp)
{
if(!node->getOpCode().isMul() ||
!node->isFPStrictCompliant() ||
node->getRegister())
return false;
if( node->getReferenceCount() < 2 && node->getRegister() == NULL)
return true;
node->setIsFPStrictCompliant(false);// need to set this otherwise children get incorrectly bumped
return false;
}
/** Generate a fused multiply add from the tree (A * B) + C, where addNode is the + node
* and mulNode the * subtree.
*/
static TR::Register *generateFusedMultiplyAdd(TR::Node *addNode,TR::InstOpCode::Mnemonic OpCode, TR::CodeGenerator *cg)
{
TR::Node *mulNode = addNode->getFirstChild();
TR::Node *addChild = addNode->getSecondChild();
if (!isFPStrictMul(mulNode, cg->comp()))
{
addChild = addNode->getFirstChild();
mulNode = addNode->getSecondChild();
}
TR_ASSERT(mulNode->getReferenceCount() < 2,"Mul node 0x%p reference count %d >= 2\n",mulNode,mulNode->getReferenceCount());
TR_ASSERT(mulNode->getOpCode().isMul(),"Unexpected op!=mul %p\n",mulNode);
TR_ASSERT(mulNode->isFPStrictCompliant(),"mul node %p is not fpStrict Compliant\n",mulNode);
TR::Register *source1Register = cg->evaluate(mulNode->getFirstChild());
TR::Register *source2Register = cg->evaluate(mulNode->getSecondChild());
TR::Register *source3Register = cg->evaluate(addChild);
TR::Register *trgRegister;
if(addNode->getDataType() == TR::Float)
trgRegister = cg->allocateSinglePrecisionRegister();
else
trgRegister = cg->allocateRegister(TR_FPR); // TR::Double
generateTrg1Src3Instruction(cg, OpCode, addNode, trgRegister, source1Register, source2Register,source3Register);
addNode->setRegister(trgRegister);
cg->decReferenceCount(mulNode->getFirstChild());
cg->decReferenceCount(mulNode->getSecondChild());
cg->decReferenceCount(mulNode); // don't forget this guy!
cg->decReferenceCount(addChild);
return trgRegister;
}
TR::Register *OMR::Power::TreeEvaluator::faddEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
TR::Register *result=NULL;
if((isFPStrictMul(node->getFirstChild(), comp) ||
isFPStrictMul(node->getSecondChild(), comp)) &&
performTransformation(comp, "O^O Changing [%p] to fmadd\n",node))
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fmadds, cg);
else
result = singlePrecisionEvaluator(node, TR::InstOpCode::fadds, cg);
return result;
}
TR::Register *OMR::Power::TreeEvaluator::daddEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
TR::Register *result=NULL;
if((isFPStrictMul(node->getFirstChild(), comp) ||
isFPStrictMul(node->getSecondChild(), comp)) &&
performTransformation(comp, "O^O Changing [%p] to dmadd\n",node))
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fmadd, cg);
else
result = doublePrecisionEvaluator(node, TR::InstOpCode::fadd, cg);
return result;
}
TR::Register *OMR::Power::TreeEvaluator::dsubEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
TR::Register *result=NULL;
if(isFPStrictMul(node->getFirstChild(), comp) &&
performTransformation(comp, "O^O Changing [%p] to fmsub\n",node))
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fmsub, cg);
else
{
if (isFPStrictMul(node->getSecondChild(), comp) &&
performTransformation(comp, "O^O Changing [%p] to fnmsub\n",node))
{
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fnmsub, cg);
}
else
result = doublePrecisionEvaluator(node, TR::InstOpCode::fsub, cg);
}
return result;
}
TR::Register *OMR::Power::TreeEvaluator::fsubEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Compilation *comp = cg->comp();
TR::Register *result=NULL;
if(isFPStrictMul(node->getFirstChild(), comp)&&
performTransformation(comp, "O^O Changing [%p] to fmsub\n",node))
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fmsubs, cg);
else
{
if (isFPStrictMul(node->getSecondChild(), comp) &&
performTransformation(comp, "O^O Changing [%p] to fnmsub\n",node))
{
result = generateFusedMultiplyAdd(node, TR::InstOpCode::fnmsubs, cg);
}
else
result = singlePrecisionEvaluator(node, TR::InstOpCode::fsubs, cg);
}
return result;
}
TR::Register *OMR::Power::TreeEvaluator::fmulEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
return singlePrecisionEvaluator(node, TR::InstOpCode::fmuls, cg);
}
TR::Register *OMR::Power::TreeEvaluator::dmulEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
return doublePrecisionEvaluator(node, TR::InstOpCode::fmul, cg);
}
TR::Register *OMR::Power::TreeEvaluator::fdivEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
return singlePrecisionEvaluator(node, TR::InstOpCode::fdivs, cg);
}
TR::Register *OMR::Power::TreeEvaluator::ddivEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
return doublePrecisionEvaluator(node, TR::InstOpCode::fdiv, cg);
}
TR::Register *OMR::Power::TreeEvaluator::fremEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Register *trgReg = cg->allocateSinglePrecisionRegister();
TR::Node *child1 = node->getFirstChild();
TR::Node *child2 = node->getSecondChild();
TR::Register *source1Reg = cg->evaluate(child1);
TR::Register *source2Reg = cg->evaluate(child2);
TR::Register *copyReg;
TR::RegisterDependencyConditions *dependencies = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(16, 16, cg->trMemory());
if (!cg->canClobberNodesRegister(child1))
{
copyReg = cg->allocateSinglePrecisionRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::fmr, node, copyReg, source1Reg);
source1Reg = copyReg;
}
if (!cg->canClobberNodesRegister(child2))
{
copyReg = cg->allocateSinglePrecisionRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::fmr, node, copyReg, source2Reg);
source2Reg = copyReg;
}
TR::addDependency(dependencies, source1Reg, TR::RealRegister::fp0, TR_FPR, cg);
TR::addDependency(dependencies, source2Reg, TR::RealRegister::fp1, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr0, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr3, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr4, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr8, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr11, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr0, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr1, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr6, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp2, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp3, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp4, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp5, TR_FPR, cg);
TR::TreeEvaluator::generateHelperBranchAndLinkInstruction(TR_PPCdoubleRemainder, node, dependencies, cg);
// all registers on dep are now not used any longer, except source1
dependencies->stopUsingDepRegs(cg, source1Reg);
generateTrg1Src1Instruction(cg, TR::InstOpCode::frsp, node, trgReg, source1Reg);
cg->decReferenceCount(child1);
cg->decReferenceCount(child2);
cg->stopUsingRegister(source1Reg);
node->setRegister(trgReg);
cg->machine()->setLinkRegisterKilled(true);
return trgReg;
}
TR::Register *OMR::Power::TreeEvaluator::dremEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
TR::Node *child1 = node->getFirstChild();
TR::Node *child2 = node->getSecondChild();
TR::Register *source1Reg = cg->evaluate(child1);
TR::Register *source2Reg = cg->evaluate(child2);
TR::Register *copyReg;
TR::RegisterDependencyConditions *dependencies = new (cg->trHeapMemory()) TR::RegisterDependencyConditions(16, 16, cg->trMemory());
if (!cg->canClobberNodesRegister(child1))
{
copyReg = cg->allocateRegister(TR_FPR);
generateTrg1Src1Instruction(cg, TR::InstOpCode::fmr, node, copyReg, source1Reg);
source1Reg = copyReg;
}
if (!cg->canClobberNodesRegister(child2))
{
copyReg = cg->allocateRegister(TR_FPR);
generateTrg1Src1Instruction(cg, TR::InstOpCode::fmr, node, copyReg, source2Reg);
source2Reg = copyReg;
}
TR::addDependency(dependencies, source1Reg, TR::RealRegister::fp0, TR_FPR, cg);
TR::addDependency(dependencies, source2Reg, TR::RealRegister::fp1, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr0, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr3, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr4, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr8, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::gr11, TR_GPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr0, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr1, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::cr6, TR_CCR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp2, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp3, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp4, TR_FPR, cg);
TR::addDependency(dependencies, NULL, TR::RealRegister::fp5, TR_FPR, cg);
TR::TreeEvaluator::generateHelperBranchAndLinkInstruction(TR_PPCdoubleRemainder, node, dependencies, cg);
node->setRegister(source1Reg);
cg->decReferenceCount(child1);
cg->decReferenceCount(child2);
if (source1Reg->isSinglePrecision())
source1Reg->setIsSinglePrecision(false);
// all regsiters(except source1) on dep are now not used any longer.
dependencies->stopUsingDepRegs(cg, source1Reg);
cg->machine()->setLinkRegisterKilled(true);
return source1Reg;
}
/**
* regular neg simplification, but if child is fmadd/fmsub, and node not
* shared, generate fnmadd/fnmsub
* handles both fneg and dneg
*/
TR::Register *OMR::Power::TreeEvaluator::fnegEvaluator(TR::Node *node, TR::CodeGenerator *cg)
{
bool noFMA=true;
TR::Register *trgRegister;
TR::Compilation *comp = cg->comp();
TR::Node *firstChild = node->getFirstChild();
bool isAddOrSub = firstChild->getOpCode().isAdd() || firstChild->getOpCode().isSub();
if(firstChild->getReferenceCount() < 2 && !firstChild->getRegister() && isAddOrSub)
{
TR::Register *result=NULL;
bool isAdd = firstChild->getOpCode().isAdd();
if((isFPStrictMul(firstChild->getFirstChild(), comp) ||
(isAdd && isFPStrictMul(firstChild->getSecondChild(), comp))) &&
performTransformation(comp, "O^O Changing [%p] to fnmadd/sub\n",node))
{
TR::InstOpCode::Mnemonic opCode =
node->getOpCode().isFloat()
? (isAdd ? TR::InstOpCode::fnmadds:TR::InstOpCode::fnmsubs)
: (isAdd ? TR::InstOpCode::fnmadd :TR::InstOpCode::fnmsub);
noFMA=false;
trgRegister = generateFusedMultiplyAdd(firstChild, opCode, cg);
firstChild->unsetRegister();//unset as the first child isn't the result node
}
}
if(noFMA)
{
TR::Register *sourceRegister = NULL;
trgRegister = node->getOpCode().isFloat() ? cg->allocateSinglePrecisionRegister() : cg->allocateRegister(TR_FPR);
sourceRegister = cg->evaluate(firstChild);
generateTrg1Src1Instruction(cg, TR::InstOpCode::fneg, node, trgRegister, sourceRegister);
}
cg->decReferenceCount(firstChild);
node->setRegister(trgRegister);
return trgRegister;
}
TR::Register *OMR::Power::TreeEvaluator::int2dbl(TR::Node * node, TR::Register *srcReg, bool canClobber, TR::CodeGenerator *cg)
{
if (node->getOpCodeValue() == TR::b2f || node->getOpCodeValue() == TR::b2d)
{
TR::Register *tmpReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsb, node, tmpReg, srcReg);
srcReg = tmpReg;
cg->stopUsingRegister(tmpReg);
}
else if (node->getOpCodeValue() == TR::bu2f || node->getOpCodeValue() == TR::bu2d)
{
TR::Register *tmpReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rlwinm, node, tmpReg, srcReg, 0, 0xff);
srcReg = tmpReg;
cg->stopUsingRegister(tmpReg);
}
TR::Register *trgReg = cg->allocateRegister(TR_FPR);
TR::Register *tempReg;
if (cg->is64BitProcessor() || (cg->comp()->compileRelocatableCode() && cg->comp()->target().is64Bit()))
{
if (cg->comp()->target().is64Bit())
{
if (node->getOpCodeValue() == TR::iu2f || node->getOpCodeValue() == TR::iu2d)
{
tempReg = cg->allocateRegister();
generateTrg1Src1Imm2Instruction(cg, TR::InstOpCode::rldicl, node, tempReg, srcReg, 0, CONSTANT64(0x00000000ffffffff));
generateMvFprGprInstructions(cg, node, gpr2fprHost64, false, trgReg, tempReg);
cg->stopUsingRegister(tempReg);
}
else if (node->getOpCodeValue() == TR::i2f || node->getOpCodeValue() == TR::i2d)
{
tempReg = cg->allocateRegister();
generateTrg1Src1Instruction(cg, TR::InstOpCode::extsw, node, tempReg, srcReg);
generateMvFprGprInstructions(cg, node, gpr2fprHost64, false, trgReg, tempReg);
cg->stopUsingRegister(tempReg);
}
else
generateMvFprGprInstructions(cg, node, gpr2fprHost64, false, trgReg, srcReg);
}
else