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 }