| /* |
| * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.lir.amd64; |
| |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; |
| import jdk.vm.ci.amd64.AMD64; |
| import jdk.vm.ci.amd64.AMD64Kind; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; |
| import org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| /** |
| * AMD64 rdtsc operation. The result is in EDX:EAX. |
| */ |
| @Opcode("RDTSC") |
| public class AMD64ReadTimestampCounter extends AMD64LIRInstruction { |
| public static final LIRInstructionClass<AMD64ReadTimestampCounter> TYPE = LIRInstructionClass.create(AMD64ReadTimestampCounter.class); |
| |
| @Def({REG}) protected AllocatableValue highResult; |
| @Def({REG}) protected AllocatableValue lowResult; |
| |
| public AMD64ReadTimestampCounter() { |
| super(TYPE); |
| |
| this.highResult = AMD64.rdx.asValue(LIRKind.value(AMD64Kind.DWORD)); |
| this.lowResult = AMD64.rax.asValue(LIRKind.value(AMD64Kind.DWORD)); |
| } |
| |
| public AllocatableValue getHighResult() { |
| return highResult; |
| } |
| |
| public AllocatableValue getLowResult() { |
| return lowResult; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { |
| masm.rdtsc(); |
| } |
| } |