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package org.graalvm.compiler.lir.aarch64;

import static jdk.vm.ci.code.ValueUtil.asRegister;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.COMPOSITE;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;

import org.graalvm.compiler.asm.aarch64.AArch64Address;
import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.lir.LIRFrameState;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.StandardOp.ImplicitNullCheck;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.AllocatableValue;
import jdk.vm.ci.meta.Value;

AARCH64 LIR instructions that have one input and one output.
/** * AARCH64 LIR instructions that have one input and one output. */
public class AArch64Unary {
Instruction with a memory operand.
/** * Instruction with a {@link AArch64AddressValue memory} operand. */
public static class MemoryOp extends AArch64LIRInstruction implements ImplicitNullCheck { public static final LIRInstructionClass<MemoryOp> TYPE = LIRInstructionClass.create(MemoryOp.class); private final boolean isSigned; @Def({REG}) protected AllocatableValue result; @Use({COMPOSITE}) protected AArch64AddressValue input; @State protected LIRFrameState state; private int targetSize; private int srcSize; public MemoryOp(boolean isSigned, int targetSize, int srcSize, AllocatableValue result, AArch64AddressValue input, LIRFrameState state) { super(TYPE); this.targetSize = targetSize; this.srcSize = srcSize; this.isSigned = isSigned; this.result = result; this.input = input; this.state = state; } @Override public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { if (state != null) { crb.recordImplicitException(masm.position(), state); } AArch64Address address = input.toAddress(); Register dst = asRegister(result); if (isSigned) { masm.ldrs(targetSize, srcSize, dst, address); } else { masm.ldr(srcSize, dst, address); } } @Override public boolean makeNullCheckFor(Value value, LIRFrameState nullCheckState, int implicitNullCheckLimit) { int displacement = input.getDisplacement(); if (state == null && value.equals(input.getBase()) && input.getOffset().equals(Value.ILLEGAL) && displacement >= 0 && displacement < implicitNullCheckLimit) { state = nullCheckState; return true; } return false; } } }