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package org.graalvm.compiler.lir.aarch64;

import static jdk.vm.ci.code.ValueUtil.asRegister;

import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;

import jdk.vm.ci.aarch64.AArch64Kind;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.meta.AllocatableValue;

Instruction that reinterprets some bit pattern as a different type. It is possible to reinterpret the following: - int <-> float - long <-> double
/** * Instruction that reinterprets some bit pattern as a different type. It is possible to reinterpret * the following: - int <-> float - long <-> double */
public class AArch64ReinterpretOp extends AArch64LIRInstruction { private static final LIRInstructionClass<AArch64ReinterpretOp> TYPE = LIRInstructionClass.create(AArch64ReinterpretOp.class); @Def protected AllocatableValue resultValue; @Use protected AllocatableValue inputValue; public AArch64ReinterpretOp(AllocatableValue resultValue, AllocatableValue inputValue) { super(TYPE); AArch64Kind from = (AArch64Kind) inputValue.getPlatformKind(); AArch64Kind to = (AArch64Kind) resultValue.getPlatformKind(); assert from.getSizeInBytes() == to.getSizeInBytes() && from.isInteger() ^ to.isInteger(); this.resultValue = resultValue; this.inputValue = inputValue; } @Override public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { Register result = asRegister(resultValue); Register input = asRegister(inputValue); AArch64Kind to = (AArch64Kind) resultValue.getPlatformKind(); final int size = to.getSizeInBytes() * Byte.SIZE; masm.fmov(size, result, input); } }