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/*
* Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package org.graalvm.compiler.core.amd64;
import static org.graalvm.compiler.asm.amd64.AMD64Assembler.AMD64BinaryArithmetic.CMP;
import static org.graalvm.compiler.asm.amd64.AMD64Assembler.OperandSize.DWORD;
import static org.graalvm.compiler.asm.amd64.AMD64Assembler.OperandSize.PD;
import static org.graalvm.compiler.asm.amd64.AMD64Assembler.OperandSize.PS;
import static org.graalvm.compiler.asm.amd64.AMD64Assembler.OperandSize.QWORD;
import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC;
import static org.graalvm.compiler.lir.LIRValueUtil.asConstantValue;
import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant;
import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant;
import static jdk.vm.ci.code.ValueUtil.isAllocatableValue;
import org.graalvm.compiler.asm.NumUtil;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.AMD64MIOp;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.AMD64RMOp;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.ConditionFlag;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.OperandSize;
import org.graalvm.compiler.asm.amd64.AMD64Assembler.SSEOp;
import org.graalvm.compiler.core.common.LIRKind;
import org.graalvm.compiler.core.common.calc.Condition;
import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
import org.graalvm.compiler.core.common.spi.LIRKindTool;
import org.graalvm.compiler.debug.GraalError;
import org.graalvm.compiler.lir.ConstantValue;
import org.graalvm.compiler.lir.LIRFrameState;
import org.graalvm.compiler.lir.LIRInstruction;
import org.graalvm.compiler.lir.LIRValueUtil;
import org.graalvm.compiler.lir.LabelRef;
import org.graalvm.compiler.lir.StandardOp.JumpOp;
import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
import org.graalvm.compiler.lir.SwitchStrategy;
import org.graalvm.compiler.lir.Variable;
import org.graalvm.compiler.lir.amd64.AMD64AddressValue;
import org.graalvm.compiler.lir.amd64.AMD64ArithmeticLIRGeneratorTool;
import org.graalvm.compiler.lir.amd64.AMD64ArrayEqualsOp;
import org.graalvm.compiler.lir.amd64.AMD64BinaryConsumer;
import org.graalvm.compiler.lir.amd64.AMD64ByteSwapOp;
import org.graalvm.compiler.lir.amd64.AMD64Call;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.BranchOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.CondMoveOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.FloatBranchOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.FloatCondMoveOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.ReturnOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.StrategySwitchOp;
import org.graalvm.compiler.lir.amd64.AMD64ControlFlow.TableSwitchOp;
import org.graalvm.compiler.lir.amd64.AMD64Move;
import org.graalvm.compiler.lir.amd64.AMD64Move.CompareAndSwapOp;
import org.graalvm.compiler.lir.amd64.AMD64Move.MembarOp;
import org.graalvm.compiler.lir.amd64.AMD64Move.StackLeaOp;
import org.graalvm.compiler.lir.amd64.AMD64PauseOp;
import org.graalvm.compiler.lir.amd64.AMD64ZapRegistersOp;
import org.graalvm.compiler.lir.amd64.AMD64ZapStackOp;
import org.graalvm.compiler.lir.gen.LIRGenerationResult;
import org.graalvm.compiler.lir.gen.LIRGenerator;
import org.graalvm.compiler.phases.util.Providers;
import jdk.vm.ci.amd64.AMD64;
import jdk.vm.ci.amd64.AMD64Kind;
import jdk.vm.ci.code.CallingConvention;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.RegisterValue;
import jdk.vm.ci.code.StackSlot;
import jdk.vm.ci.meta.AllocatableValue;
import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.JavaKind;
import jdk.vm.ci.meta.PlatformKind;
import jdk.vm.ci.meta.VMConstant;
import jdk.vm.ci.meta.Value;
import jdk.vm.ci.meta.ValueKind;
/**
* This class implements the AMD64 specific portion of the LIR generator.
*/
public abstract class AMD64LIRGenerator extends LIRGenerator {
public AMD64LIRGenerator(LIRKindTool lirKindTool, AMD64ArithmeticLIRGenerator arithmeticLIRGen, MoveFactory moveFactory, Providers providers, LIRGenerationResult lirGenRes) {
super(lirKindTool, arithmeticLIRGen, moveFactory, providers, lirGenRes);
}
/**
* Checks whether the supplied constant can be used without loading it into a register for store
* operations, i.e., on the right hand side of a memory access.
*
* @param c The constant to check.
* @return True if the constant can be used directly, false if the constant needs to be in a
* register.
*/
protected static final boolean canStoreConstant(JavaConstant c) {
// there is no immediate move of 64-bit constants on Intel
switch (c.getJavaKind()) {
case Long: {
long l = c.asLong();
return (int) l == l;
}
case Double:
return false;
case Object:
return c.isNull();
default:
return true;
}
}
@Override
protected JavaConstant zapValueForKind(PlatformKind kind) {
long dead = 0xDEADDEADDEADDEADL;
switch ((AMD64Kind) kind) {
case BYTE:
return JavaConstant.forByte((byte) dead);
case WORD:
return JavaConstant.forShort((short) dead);
case DWORD:
return JavaConstant.forInt((int) dead);
case QWORD:
return JavaConstant.forLong(dead);
case SINGLE:
return JavaConstant.forFloat(Float.intBitsToFloat((int) dead));
default:
// we don't support vector types, so just zap with double for all of them
return JavaConstant.forDouble(Double.longBitsToDouble(dead));
}
}
public AMD64AddressValue asAddressValue(Value address) {
if (address instanceof AMD64AddressValue) {
return (AMD64AddressValue) address;
} else {
if (address instanceof JavaConstant) {
long displacement = ((JavaConstant) address).asLong();
if (NumUtil.isInt(displacement)) {
return new AMD64AddressValue(address.getValueKind(), Value.ILLEGAL, (int) displacement);
}
}
return new AMD64AddressValue(address.getValueKind(), asAllocatable(address), 0);
}
}
@Override
public Variable emitAddress(AllocatableValue stackslot) {
Variable result = newVariable(LIRKind.value(target().arch.getWordKind()));
append(new StackLeaOp(result, stackslot));
return result;
}
/**
* The AMD64 backend only uses DWORD and QWORD values in registers because of a performance
* penalty when accessing WORD or BYTE registers. This function converts small integer kinds to
* DWORD.
*/
@Override
public <K extends ValueKind<K>> K toRegisterKind(K kind) {
switch ((AMD64Kind) kind.getPlatformKind()) {
case BYTE:
case WORD:
return kind.changeType(AMD64Kind.DWORD);
default:
return kind;
}
}
@Override
public Variable emitCompareAndSwap(Value address, Value expectedValue, Value newValue, Value trueValue, Value falseValue) {
ValueKind<?> kind = newValue.getValueKind();
assert kind.equals(expectedValue.getValueKind());
AMD64Kind memKind = (AMD64Kind) kind.getPlatformKind();
AMD64AddressValue addressValue = asAddressValue(address);
RegisterValue raxRes = AMD64.rax.asValue(kind);
emitMove(raxRes, expectedValue);
append(new CompareAndSwapOp(memKind, raxRes, addressValue, raxRes, asAllocatable(newValue)));
assert trueValue.getValueKind().equals(falseValue.getValueKind());
Variable result = newVariable(trueValue.getValueKind());
append(new CondMoveOp(result, Condition.EQ, asAllocatable(trueValue), falseValue));
return result;
}
@Override
public Value emitAtomicReadAndAdd(Value address, Value delta) {
ValueKind<?> kind = delta.getValueKind();
Variable result = newVariable(kind);
AMD64AddressValue addressValue = asAddressValue(address);
append(new AMD64Move.AtomicReadAndAddOp((AMD64Kind) kind.getPlatformKind(), result, addressValue, asAllocatable(delta)));
return result;
}
@Override
public Value emitAtomicReadAndWrite(Value address, Value newValue) {
ValueKind<?> kind = newValue.getValueKind();
Variable result = newVariable(kind);
AMD64AddressValue addressValue = asAddressValue(address);
append(new AMD64Move.AtomicReadAndWriteOp((AMD64Kind) kind.getPlatformKind(), result, addressValue, asAllocatable(newValue)));
return result;
}
@Override
public void emitNullCheck(Value address, LIRFrameState state) {
append(new AMD64Move.NullCheckOp(asAddressValue(address), state));
}
@Override
public void emitJump(LabelRef label) {
assert label != null;
append(new JumpOp(label));
}
@Override
public void emitCompareBranch(PlatformKind cmpKind, Value left, Value right, Condition cond, boolean unorderedIsTrue, LabelRef trueLabel, LabelRef falseLabel, double trueLabelProbability) {
boolean mirrored = emitCompare(cmpKind, left, right);
Condition finalCondition = mirrored ? cond.mirror() : cond;
if (cmpKind == AMD64Kind.SINGLE || cmpKind == AMD64Kind.DOUBLE) {
append(new FloatBranchOp(finalCondition, unorderedIsTrue, trueLabel, falseLabel, trueLabelProbability));
} else {
append(new BranchOp(finalCondition, trueLabel, falseLabel, trueLabelProbability));
}
}
public void emitCompareBranchMemory(AMD64Kind cmpKind, Value left, AMD64AddressValue right, LIRFrameState state, Condition cond, boolean unorderedIsTrue, LabelRef trueLabel, LabelRef falseLabel,
double trueLabelProbability) {
boolean mirrored = emitCompareMemory(cmpKind, left, right, state);
Condition finalCondition = mirrored ? cond.mirror() : cond;
if (cmpKind.isXMM()) {
append(new FloatBranchOp(finalCondition, unorderedIsTrue, trueLabel, falseLabel, trueLabelProbability));
} else {
append(new BranchOp(finalCondition, trueLabel, falseLabel, trueLabelProbability));
}
}
@Override
public void emitOverflowCheckBranch(LabelRef overflow, LabelRef noOverflow, LIRKind cmpLIRKind, double overflowProbability) {
append(new BranchOp(ConditionFlag.Overflow, overflow, noOverflow, overflowProbability));
}
@Override
public void emitIntegerTestBranch(Value left, Value right, LabelRef trueDestination, LabelRef falseDestination, double trueDestinationProbability) {
emitIntegerTest(left, right);
append(new BranchOp(Condition.EQ, trueDestination, falseDestination, trueDestinationProbability));
}
@Override
public Variable emitConditionalMove(PlatformKind cmpKind, Value left, Value right, Condition cond, boolean unorderedIsTrue, Value trueValue, Value falseValue) {
boolean mirrored = emitCompare(cmpKind, left, right);
Condition finalCondition = mirrored ? cond.mirror() : cond;
Variable result = newVariable(trueValue.getValueKind());
if (cmpKind == AMD64Kind.SINGLE || cmpKind == AMD64Kind.DOUBLE) {
append(new FloatCondMoveOp(result, finalCondition, unorderedIsTrue, load(trueValue), load(falseValue)));
} else {
append(new CondMoveOp(result, finalCondition, load(trueValue), loadNonConst(falseValue)));
}
return result;
}
@Override
public Variable emitIntegerTestMove(Value left, Value right, Value trueValue, Value falseValue) {
emitIntegerTest(left, right);
Variable result = newVariable(trueValue.getValueKind());
append(new CondMoveOp(result, Condition.EQ, load(trueValue), loadNonConst(falseValue)));
return result;
}
private void emitIntegerTest(Value a, Value b) {
assert ((AMD64Kind) a.getPlatformKind()).isInteger();
OperandSize size = a.getPlatformKind() == AMD64Kind.QWORD ? QWORD : DWORD;
if (isJavaConstant(b) && NumUtil.is32bit(asJavaConstant(b).asLong())) {
append(new AMD64BinaryConsumer.ConstOp(AMD64MIOp.TEST, size, asAllocatable(a), (int) asJavaConstant(b).asLong()));
} else if (isJavaConstant(a) && NumUtil.is32bit(asJavaConstant(a).asLong())) {
append(new AMD64BinaryConsumer.ConstOp(AMD64MIOp.TEST, size, asAllocatable(b), (int) asJavaConstant(a).asLong()));
} else if (isAllocatableValue(b)) {
append(new AMD64BinaryConsumer.Op(AMD64RMOp.TEST, size, asAllocatable(b), asAllocatable(a)));
} else {
append(new AMD64BinaryConsumer.Op(AMD64RMOp.TEST, size, asAllocatable(a), asAllocatable(b)));
}
}
/**
* This method emits the compare against memory instruction, and may reorder the operands. It
* returns true if it did so.
*
* @param b the right operand of the comparison
* @return true if the left and right operands were switched, false otherwise
*/
private boolean emitCompareMemory(AMD64Kind cmpKind, Value a, AMD64AddressValue b, LIRFrameState state) {
OperandSize size;
switch (cmpKind) {
case BYTE:
size = OperandSize.BYTE;
break;
case WORD:
size = OperandSize.WORD;
break;
case DWORD:
size = OperandSize.DWORD;
break;
case QWORD:
size = OperandSize.QWORD;
break;
case SINGLE:
append(new AMD64BinaryConsumer.MemoryRMOp(SSEOp.UCOMIS, PS, asAllocatable(a), b, state));
return false;
case DOUBLE:
append(new AMD64BinaryConsumer.MemoryRMOp(SSEOp.UCOMIS, PD, asAllocatable(a), b, state));
return false;
default:
throw GraalError.shouldNotReachHere("unexpected kind: " + cmpKind);
}
if (isJavaConstant(a)) {
return emitCompareMemoryConOp(size, asConstantValue(a), b, state);
} else {
return emitCompareRegMemoryOp(size, asAllocatable(a), b, state);
}
}
protected boolean emitCompareMemoryConOp(OperandSize size, ConstantValue a, AMD64AddressValue b, LIRFrameState state) {
if (JavaConstant.isNull(a.getConstant())) {
append(new AMD64BinaryConsumer.MemoryConstOp(CMP, size, b, 0, state));
return true;
} else if (a.getConstant() instanceof VMConstant && size == DWORD) {
VMConstant vc = (VMConstant) a.getConstant();
append(new AMD64BinaryConsumer.MemoryVMConstOp(CMP.getMIOpcode(size, false), b, vc, state));
return true;
} else {
long value = a.getJavaConstant().asLong();
if (NumUtil.is32bit(value)) {
append(new AMD64BinaryConsumer.MemoryConstOp(CMP, size, b, (int) value, state));
return true;
} else {
return emitCompareRegMemoryOp(size, asAllocatable(a), b, state);
}
}
}
private boolean emitCompareRegMemoryOp(OperandSize size, AllocatableValue a, AMD64AddressValue b, LIRFrameState state) {
AMD64RMOp op = CMP.getRMOpcode(size);
append(new AMD64BinaryConsumer.MemoryRMOp(op, size, a, b, state));
return false;
}
/**
* This method emits the compare instruction, and may reorder the operands. It returns true if
* it did so.
*
* @param a the left operand of the comparison
* @param b the right operand of the comparison
* @return true if the left and right operands were switched, false otherwise
*/
private boolean emitCompare(PlatformKind cmpKind, Value a, Value b) {
Variable left;
Value right;
boolean mirrored;
if (LIRValueUtil.isVariable(b)) {
left = load(b);
right = loadNonConst(a);
mirrored = true;
} else {
left = load(a);
right = loadNonConst(b);
mirrored = false;
}
((AMD64ArithmeticLIRGeneratorTool) arithmeticLIRGen).emitCompareOp((AMD64Kind) cmpKind, left, right);
return mirrored;
}
@Override
public void emitMembar(int barriers) {
int necessaryBarriers = target().arch.requiredBarriers(barriers);
if (target().isMP && necessaryBarriers != 0) {
append(new MembarOp(necessaryBarriers));
}
}
public abstract void emitCCall(long address, CallingConvention nativeCallingConvention, Value[] args, int numberOfFloatingPointArguments);
@Override
protected void emitForeignCallOp(ForeignCallLinkage linkage, Value result, Value[] arguments, Value[] temps, LIRFrameState info) {
long maxOffset = linkage.getMaxCallTargetOffset();
if (maxOffset != (int) maxOffset && !GeneratePIC.getValue()) {
append(new AMD64Call.DirectFarForeignCallOp(linkage, result, arguments, temps, info));
} else {
append(new AMD64Call.DirectNearForeignCallOp(linkage, result, arguments, temps, info));
}
}
@Override
public Variable emitByteSwap(Value input) {
Variable result = newVariable(LIRKind.combine(input));
append(new AMD64ByteSwapOp(result, input));
return result;
}
@Override
public Variable emitArrayEquals(JavaKind kind, Value array1, Value array2, Value length) {
Variable result = newVariable(LIRKind.value(AMD64Kind.DWORD));
append(new AMD64ArrayEqualsOp(this, kind, result, array1, array2, asAllocatable(length)));
return result;
}
@Override
public void emitReturn(JavaKind kind, Value input) {
AllocatableValue operand = Value.ILLEGAL;
if (input != null) {
operand = resultOperandFor(kind, input.getValueKind());
emitMove(operand, input);
}
append(new ReturnOp(operand));
}
protected StrategySwitchOp createStrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Variable key, AllocatableValue temp) {
return new StrategySwitchOp(strategy, keyTargets, defaultTarget, key, temp);
}
@Override
public void emitStrategySwitch(SwitchStrategy strategy, Variable key, LabelRef[] keyTargets, LabelRef defaultTarget) {
// a temp is needed for loading object constants
boolean needsTemp = !LIRKind.isValue(key);
append(createStrategySwitchOp(strategy, keyTargets, defaultTarget, key, needsTemp ? newVariable(key.getValueKind()) : Value.ILLEGAL));
}
@Override
protected void emitTableSwitch(int lowKey, LabelRef defaultTarget, LabelRef[] targets, Value key) {
append(new TableSwitchOp(lowKey, defaultTarget, targets, key, newVariable(LIRKind.value(target().arch.getWordKind())), newVariable(key.getValueKind())));
}
@Override
public void emitPause() {
append(new AMD64PauseOp());
}
@Override
public SaveRegistersOp createZapRegisters(Register[] zappedRegisters, JavaConstant[] zapValues) {
return new AMD64ZapRegistersOp(zappedRegisters, zapValues);
}
@Override
public LIRInstruction createZapArgumentSpace(StackSlot[] zappedStack, JavaConstant[] zapValues) {
return new AMD64ZapStackOp(zappedStack, zapValues);
}
}