1 /* 2 * Copyright (c) 2015, 2016, 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.Opcode; 31 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 32 33 import jdk.vm.ci.code.Register; 34 import jdk.vm.ci.meta.AllocatableValue; 35 36 @Opcode("SIGNEXTEND") 37 public class AArch64SignExtendOp extends AArch64LIRInstruction { 38 private static final LIRInstructionClass<AArch64SignExtendOp> TYPE = LIRInstructionClass.create(AArch64SignExtendOp.class); 39 40 @Def protected AllocatableValue resultValue; 41 @Use protected AllocatableValue inputValue; 42 private final int fromBits; 43 private final int toBits; 44 45 public AArch64SignExtendOp(AllocatableValue resultValue, AllocatableValue inputValue, int fromBits, int toBits) { 46 super(TYPE); 47 this.resultValue = resultValue; 48 this.inputValue = inputValue; 49 this.fromBits = fromBits; 50 this.toBits = toBits; 51 } 52 53 @Override 54 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { 55 Register result = asRegister(resultValue); 56 Register input = asRegister(inputValue); 57 masm.sxt(toBits, fromBits, result, input); 58 } 59 }