view graal/com.oracle.graal.replacements.amd64/src/com/oracle/graal/replacements/amd64/AMD64IntegerSubstitutions.java @ 18495:fe0db662e982

adds ability for substitution guards to have a constructor with an Architecture argument added extra flags enum to AMD64 to drive code emission features (currently contains UseCountLeadingZerosInstruction and UseCountTrailingZerosInstruction) moved lzcnt/tzcnt nodes and substitutions to com.oracle.graal.replacements.amd64 Contributed-by: Igor Veresov <igor.veresov@oracle.com>
author Doug Simon <doug.simon@oracle.com>
date Mon, 24 Nov 2014 20:32:24 +0100
parents graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/IntegerSubstitutions.java@6dc4f0be9a70
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.replacements.*;

@ClassSubstitution(Integer.class)
public class AMD64IntegerSubstitutions {

    @MethodSubstitution(guard = AMD64Guards.CountLeadingZerosSupported.class)
    public static int numberOfLeadingZeros(int i) {
        return AMD64CountLeadingZerosNode.count(i);
    }

    @MethodSubstitution(guard = AMD64Guards.CountTrailingZerosSupported.class)
    public static int numberOfTrailingZeros(int i) {
        return AMD64CountTrailingZerosNode.count(i);
    }
}