Mercurial > hg > truffle
view graal/com.oracle.graal.replacements.amd64/src/com/oracle/graal/replacements/amd64/AMD64Guards.java @ 20110:51f2e71b57aa
Improvements to the Stamp infrastructure. New methods Stamp#improveWith, Stamp#tryImproveWith, Stamp#isIllegal.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 01 Apr 2015 16:36:15 +0200 |
parents | fe0db662e982 |
children |
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/* * Copyright (c) 2012, 2014, 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 com.oracle.graal.replacements.amd64; import com.oracle.graal.api.code.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.amd64.*; public class AMD64Guards { public static class CountLeadingZerosSupported implements SubstitutionGuard { private AMD64 arch; public CountLeadingZerosSupported(Architecture arch) { this.arch = (AMD64) arch; } public boolean execute() { return arch.getFlags().contains(AMD64.Flag.UseCountLeadingZerosInstruction); } } public static class CountTrailingZerosSupported implements SubstitutionGuard { private AMD64 arch; public CountTrailingZerosSupported(Architecture arch) { this.arch = (AMD64) arch; } public boolean execute() { return arch.getFlags().contains(AMD64.Flag.UseCountTrailingZerosInstruction); } } }