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view src/share/vm/classfile/altHashing.hpp @ 8331:1f1c33c860a1
Enable convert deopts to guards optimization.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 17 Mar 2013 21:27:09 +0100 |
parents | e9140bf80b4a |
children | cd6b3f1a94ff |
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/* * Copyright (c) 2012, 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. * */ #ifndef SHARE_VM_CLASSFILE_ALTHASHING_HPP #define SHARE_VM_CLASSFILE_ALTHASHING_HPP #include "prims/jni.h" #include "classfile/symbolTable.hpp" /** * Hashing utilities. * * Implementation of Murmur3 hashing. * This code was translated from src/share/classes/sun/misc/Hashing.java * code in the JDK. */ class AltHashing : AllStatic { // utility function copied from java/lang/Integer static jint Integer_rotateLeft(jint i, int distance) { return (i << distance) | (((juint)i) >> (32-distance)); } static jint murmur3_32(const int* data, int len); static jint murmur3_32(jint seed, const int* data, int len); #ifndef PRODUCT // Hashing functions used for internal testing static jint murmur3_32(const jbyte* data, int len); static jint murmur3_32(const jchar* data, int len); static void testMurmur3_32_ByteArray(); static void testEquivalentHashes(); #endif // PRODUCT public: static jint compute_seed(); static jint murmur3_32(jint seed, const jbyte* data, int len); static jint murmur3_32(jint seed, const jchar* data, int len); NOT_PRODUCT(static void test_alt_hash();) }; #endif // SHARE_VM_CLASSFILE_ALTHASHING_HPP