Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotReplacementsImpl.java @ 21526:1da7aef31a08
created com.oracle.graal.hotspot.jvmci package and moved classes destined for future JVMCI module into it (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 19 May 2015 23:16:07 +0200 |
parents | 735f8d731115 |
children | 5324104ac4f3 |
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/* * Copyright (c) 2013, 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.hotspot; import java.lang.reflect.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.replacements.*; import com.oracle.graal.hotspot.jvmci.*; import com.oracle.graal.hotspot.word.*; import com.oracle.graal.phases.util.*; import com.oracle.graal.replacements.*; /** * Filters certain method substitutions based on whether there is underlying hardware support for * them. */ public class HotSpotReplacementsImpl extends ReplacementsImpl { private final HotSpotVMConfig config; public HotSpotReplacementsImpl(Providers providers, SnippetReflectionProvider snippetReflection, HotSpotVMConfig config, TargetDescription target) { super(providers, snippetReflection, target); this.config = config; } @Override protected boolean hasGenericInvocationPluginAnnotation(ResolvedJavaMethod method) { return method.getAnnotation(HotSpotOperation.class) != null || super.hasGenericInvocationPluginAnnotation(method); } @Override protected ResolvedJavaMethod registerMethodSubstitution(ClassReplacements cr, Executable originalMethod, Method substituteMethod) { final Class<?> substituteClass = substituteMethod.getDeclaringClass(); if (substituteClass == IntegerSubstitutions.class || substituteClass == LongSubstitutions.class) { if (substituteMethod.getName().equals("numberOfLeadingZeros")) { if (config.useCountLeadingZerosInstruction) { return null; } } else if (substituteMethod.getName().equals("numberOfTrailingZeros")) { if (config.useCountTrailingZerosInstruction) { return null; } } } return super.registerMethodSubstitution(cr, originalMethod, substituteMethod); } }