1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package org.graalvm.compiler.lir.aarch64; 25 26 import static jdk.vm.ci.code.ValueUtil.asRegister; 27 28 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 29 import org.graalvm.compiler.lir.LIRInstructionClass; 30 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 31 32 import jdk.vm.ci.aarch64.AArch64Kind; 33 import jdk.vm.ci.code.Register; 34 import jdk.vm.ci.meta.AllocatableValue; 35 36 /** 37 * Instruction that reinterprets some bit pattern as a different type. It is possible to reinterpret 38 * the following: - int <-> float - long <-> double 39 */ 40 public class AArch64ReinterpretOp extends AArch64LIRInstruction { 41 private static final LIRInstructionClass<AArch64ReinterpretOp> TYPE = LIRInstructionClass.create(AArch64ReinterpretOp.class); 42 43 @Def protected AllocatableValue resultValue; 44 @Use protected AllocatableValue inputValue; 45 46 public AArch64ReinterpretOp(AllocatableValue resultValue, AllocatableValue inputValue) { 47 super(TYPE); 48 AArch64Kind from = (AArch64Kind) inputValue.getPlatformKind(); 49 AArch64Kind to = (AArch64Kind) resultValue.getPlatformKind(); 50 assert from.getSizeInBytes() == to.getSizeInBytes() && from.isInteger() ^ to.isInteger(); 51 this.resultValue = resultValue; 52 this.inputValue = inputValue; 53 } 54 55 @Override 56 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { 57 Register result = asRegister(resultValue); 58 Register input = asRegister(inputValue); 59 AArch64Kind to = (AArch64Kind) resultValue.getPlatformKind(); 60 final int size = to.getSizeInBytes() * Byte.SIZE; 61 masm.fmov(size, result, input); 62 } 63 }