1 /* 2 * Copyright (c) 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 package org.graalvm.compiler.lir.amd64; 24 25 import static jdk.vm.ci.code.ValueUtil.asRegister; 26 import static jdk.vm.ci.code.ValueUtil.isRegister; 27 28 import java.util.BitSet; 29 30 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 31 import org.graalvm.compiler.lir.LIRInstructionClass; 32 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 33 34 import jdk.vm.ci.amd64.AMD64; 35 import jdk.vm.ci.code.Register; 36 import jdk.vm.ci.code.RegisterValue; 37 import jdk.vm.ci.meta.Value; 38 39 public class AMD64VZeroUpper extends AMD64LIRInstruction { 40 41 public static final LIRInstructionClass<AMD64VZeroUpper> TYPE = LIRInstructionClass.create(AMD64VZeroUpper.class); 42 43 @Temp protected final RegisterValue[] xmmRegisters; 44 45 public AMD64VZeroUpper(Value[] exclude) { 46 super(TYPE); 47 xmmRegisters = initRegisterValues(exclude); 48 } 49 50 private static RegisterValue[] initRegisterValues(Value[] exclude) { 51 BitSet skippedRegs = new BitSet(); 52 int numSkipped = 0; 53 if (exclude != null) { 54 for (Value value : exclude) { 55 if (isRegister(value) && asRegister(value).getRegisterCategory().equals(AMD64.XMM)) { 56 skippedRegs.set(asRegister(value).number); 57 numSkipped++; 58 } 59 } 60 } 61 RegisterValue[] regs = new RegisterValue[AMD64.xmmRegistersAVX512.length - numSkipped]; 62 for (int i = 0, j = 0; i < AMD64.xmmRegistersAVX512.length; i++) { 63 Register reg = AMD64.xmmRegistersAVX512[i]; 64 if (!skippedRegs.get(reg.number)) { 65 regs[j++] = reg.asValue(); 66 } 67 } 68 return regs; 69 } 70 71 @Override 72 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler asm) { 73 asm.vzeroupper(); 74 } 75 }