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annotate graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/IntegerSubstitutions.java @ 12362:f53dc8bbb88c

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refactored isReexecutable(), getKilledLocations() and canDeoptimize() out of MetaAccessProvider into ForeignCallsProvider (GRAAL-511)
author Doug Simon <doug.simon@oracle.com>
date Sat, 12 Oct 2013 00:31:37 +0200
parents 5d3fa6f949fb
children 0244e5bdddc1
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f0d4304243ff Add intrinsics for (Long|Integer).(reverseBytes|numberOf(Trail|Lead)ingZeros)
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1 /*
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.replacements;
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24
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25 import com.oracle.graal.api.replacements.*;
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26 import com.oracle.graal.replacements.nodes.*;
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27
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28 @ClassSubstitution(Integer.class)
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29 public class IntegerSubstitutions {
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31 @MethodSubstitution
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32 public static int reverseBytes(int i) {
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33 return ReverseBytesNode.reverse(i);
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34 }
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35
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36 @MethodSubstitution
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37 public static int numberOfLeadingZeros(int i) {
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38 if (i == 0) {
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39 return 32;
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40 }
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41 return 31 - BitScanReverseNode.scan(i);
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42 }
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43
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44 @MethodSubstitution
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45 public static int numberOfTrailingZeros(int i) {
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46 if (i == 0) {
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47 return 32;
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48 }
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49 return BitScanForwardNode.scan(i);
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50 }
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51
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52 @MethodSubstitution
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53 public static int bitCount(int i) {
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54 return BitCountNode.bitCount(i);
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55 }
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56 }