1 /* 2 * Copyright (c) 2012, 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 package org.graalvm.compiler.lir.amd64; 24 25 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 26 import org.graalvm.compiler.debug.GraalError; 27 import org.graalvm.compiler.lir.LIRInstructionClass; 28 import org.graalvm.compiler.lir.Opcode; 29 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 30 31 import jdk.vm.ci.amd64.AMD64Kind; 32 import jdk.vm.ci.code.ValueUtil; 33 import jdk.vm.ci.meta.Value; 34 35 @Opcode("BSWAP") 36 public final class AMD64ByteSwapOp extends AMD64LIRInstruction { 37 public static final LIRInstructionClass<AMD64ByteSwapOp> TYPE = LIRInstructionClass.create(AMD64ByteSwapOp.class); 38 39 @Def({OperandFlag.REG, OperandFlag.HINT}) protected Value result; 40 @Use protected Value input; 41 42 public AMD64ByteSwapOp(Value result, Value input) { 43 super(TYPE); 44 this.result = result; 45 this.input = input; 46 } 47 48 @Override 49 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 50 AMD64Move.move(crb, masm, result, input); 51 switch ((AMD64Kind) input.getPlatformKind()) { 52 case DWORD: 53 masm.bswapl(ValueUtil.asRegister(result)); 54 break; 55 case QWORD: 56 masm.bswapq(ValueUtil.asRegister(result)); 57 break; 58 default: 59 throw GraalError.shouldNotReachHere(); 60 } 61 } 62 }