hotspot/src/cpu/sparc/vm/relocInfo_sparc.hpp
author twisti
Fri, 13 Feb 2009 09:09:35 -0800
changeset 2031 24e034f56dcb
parent 670 ddf3e9583f2f
child 5547 f4b087cbb361
permissions -rw-r--r--
6800154: Add comments to long_by_long_mulhi() for better understandability Summary: This patch adds a comment pointing to the Hacker's Delight version of the algorithm plus a verbatim copy of it. Furthermore it adds inline comments. Reviewed-by: kvn, jrose

/*
 * Copyright 1997-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

  // machine-dependent parts of class relocInfo
 private:
  enum {
    // Since SPARC instructions are whole words,
    // the two low-order offset bits can always be discarded.
    offset_unit        =  4,

    // There is no need for format bits; the instructions are
    // sufficiently self-identifying.
#ifndef _LP64
    format_width       =  0
#else
    // Except narrow oops in 64-bits VM.
    format_width       =  1
#endif
  };


//Reconciliation History
// 1.3 97/10/15 15:38:36 relocInfo_i486.hpp
// 1.4 97/12/08 16:01:06 relocInfo_i486.hpp
// 1.5 98/01/23 01:34:55 relocInfo_i486.hpp
// 1.6 98/02/27 15:44:53 relocInfo_i486.hpp
// 1.6 98/03/12 14:47:13 relocInfo_i486.hpp
// 1.8 99/06/22 16:37:50 relocInfo_i486.hpp
// 1.9 99/07/16 11:12:11 relocInfo_i486.hpp
//End