1 /* 2 * Copyright (c) 2016, 2018, 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 25 package org.graalvm.compiler.lir.amd64; 26 27 import static jdk.vm.ci.code.ValueUtil.asRegister; 28 import static jdk.vm.ci.code.ValueUtil.isRegister; 29 30 import java.util.BitSet; 31 32 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 33 import org.graalvm.compiler.lir.LIRInstructionClass; 34 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 35 36 import jdk.vm.ci.amd64.AMD64; 37 import jdk.vm.ci.code.Register; 38 import jdk.vm.ci.code.RegisterValue; 39 import jdk.vm.ci.meta.Value; 40 41 public class AMD64VZeroUpper extends AMD64LIRInstruction { 42 43 public static final LIRInstructionClass<AMD64VZeroUpper> TYPE = LIRInstructionClass.create(AMD64VZeroUpper.class); 44 45 @Temp protected final RegisterValue[] xmmRegisters; 46 47 public AMD64VZeroUpper(Value[] exclude) { 48 super(TYPE); 49 xmmRegisters = initRegisterValues(exclude); 50 } 51 52 private static RegisterValue[] initRegisterValues(Value[] exclude) { 53 BitSet skippedRegs = new BitSet(); 54 int numSkipped = 0; 55 if (exclude != null) { 56 for (Value value : exclude) { 57 if (isRegister(value) && asRegister(value).getRegisterCategory().equals(AMD64.XMM)) { 58 skippedRegs.set(asRegister(value).number); 59 numSkipped++; 60 } 61 } 62 } 63 RegisterValue[] regs = new RegisterValue[AMD64.xmmRegistersAVX512.length - numSkipped]; 64 for (int i = 0, j = 0; i < AMD64.xmmRegistersAVX512.length; i++) { 65 Register reg = AMD64.xmmRegistersAVX512[i]; 66 if (!skippedRegs.get(reg.number)) { 67 regs[j++] = reg.asValue(); 68 } 69 } 70 return regs; 71 } 72 73 @Override 74 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm) { 75 asm.vzeroupper(); 76 } 77 }