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package com.oracle.truffle.llvm.nodes.memory;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.NodeChild;
import com.oracle.truffle.api.dsl.NodeChildren;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.llvm.nodes.memory.LLVMCompareExchangeNodeGen.LLVMCMPXCHInternalNodeGen;
import com.oracle.truffle.llvm.runtime.LLVMAddress;
import com.oracle.truffle.llvm.runtime.global.LLVMGlobalVariable;
import com.oracle.truffle.llvm.runtime.memory.LLVMMemory;
import com.oracle.truffle.llvm.runtime.memory.LLVMStack;
import com.oracle.truffle.llvm.runtime.memory.LLVMThreadingStack;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMNode;
@NodeChildren({@NodeChild(type = LLVMExpressionNode.class, value = "address"), @NodeChild(type = LLVMExpressionNode.class, value = "comparisonValue"),
@NodeChild(type = LLVMExpressionNode.class, value = "newValue")})
public abstract class LLVMCompareExchangeNode extends LLVMExpressionNode {
@Child private LLVMCMPXCHInternalNode cmpxch;
public LLVMCompareExchangeNode(int resultSize, int secondValueOffset) {
this.cmpxch = LLVMCMPXCHInternalNodeGen.create(resultSize, secondValueOffset);
}
abstract static class LLVMCMPXCHInternalNode extends LLVMNode {
private final int resultSize;
private final int secondValueOffset;
LLVMCMPXCHInternalNode(int resultSize, int secondValueOffset) {
this.resultSize = resultSize;
this.secondValueOffset = secondValueOffset;
}
public abstract Object executeWithTarget(VirtualFrame frame, LLVMAddress address, Object cmpValue, Object newValue, LLVMStack stack);
private LLVMAddress getResultAllocation(LLVMStack stack) {
return LLVMAddress.fromLong(stack.allocateStackMemory(resultSize, 8));
}
@Specialization
public Object execute(LLVMAddress address, byte comparisonValue, byte newValue, LLVMStack stack) {
byte value = LLVMMemory.getI8(address);
LLVMAddress allocation = getResultAllocation(stack);
LLVMMemory.putI8(allocation, value);
if (value == comparisonValue) {
LLVMMemory.putI8(address, newValue);
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, true);
} else {
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, false);
}
return allocation;
}
@Specialization
public Object execute(LLVMAddress address, short comparisonValue, short newValue, LLVMStack stack) {
short value = LLVMMemory.getI16(address);
LLVMAddress allocation = getResultAllocation(stack);
LLVMMemory.putI16(allocation, value);
if (value == comparisonValue) {
LLVMMemory.putI16(address, newValue);
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, true);
} else {
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, false);
}
return allocation;
}
@Specialization
public Object execute(LLVMAddress address, int comparisonValue, int newValue, LLVMStack stack) {
int value = LLVMMemory.getI32(address);
LLVMAddress allocation = getResultAllocation(stack);
LLVMMemory.putI32(allocation, value);
if (value == comparisonValue) {
LLVMMemory.putI32(address, newValue);
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, true);
} else {
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, false);
}
return allocation;
}
@Specialization
public Object execute(LLVMAddress address, long comparisonValue, long newValue, LLVMStack stack) {
long value = LLVMMemory.getI64(address);
LLVMAddress allocation = getResultAllocation(stack);
LLVMMemory.putI64(allocation, value);
if (value == comparisonValue) {
LLVMMemory.putI64(address, newValue);
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, true);
} else {
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, false);
}
return allocation;
}
@Specialization
public Object execute(LLVMAddress address, LLVMAddress comparisonValue, LLVMAddress newValue, LLVMStack stack) {
LLVMAddress value = LLVMMemory.getAddress(address);
LLVMAddress allocation = getResultAllocation(stack);
LLVMMemory.putAddress(allocation, value);
if (value.getVal() == comparisonValue.getVal()) {
LLVMMemory.putAddress(address, newValue);
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, true);
} else {
LLVMMemory.putI1(allocation.getVal() + secondValueOffset, false);
}
return allocation;
}
}
@Specialization
public Object execute(VirtualFrame frame, LLVMAddress address, Object comparisonValue, Object newValue, @Cached("getContext().getThreadingStack()") LLVMThreadingStack stack) {
return cmpxch.executeWithTarget(frame, address, comparisonValue, newValue, stack.getStack());
}
@Specialization
public Object execute(VirtualFrame frame, LLVMGlobalVariable address, Object comparisonValue, Object newValue, @Cached("getContext().getThreadingStack()") LLVMThreadingStack stack) {
return cmpxch.executeWithTarget(frame, address.getNativeLocation(), comparisonValue, newValue, stack.getStack());
}
}