LXR linux/lib/cmpdi2.c

   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License as published by
   4 * the Free Software Foundation; either version 2 of the License, or
   5 * (at your option) any later version.
   6 *
   7 * This program is distributed in the hope that it will be useful,
   8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10 * GNU General Public License for more details.
  11 *
  12 * You should have received a copy of the GNU General Public License
  13 * along with this program; if not, see the file COPYING, or write
  14 * to the Free Software Foundation, Inc.
  15 */
  16
  17#include <linux/export.h>
  18
  19#include <linux/libgcc.h>
  20
  21word_type notrace __cmpdi2(long long a, long long b)
  22{
  23        const DWunion au = {
  24                .ll = a
  25        };
  26        const DWunion bu = {
  27                .ll = b
  28        };
  29
  30        if (au.s.high < bu.s.high)
  31                return 0;
  32        else if (au.s.high > bu.s.high)
  33                return 2;
  34
  35        if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
  36                return 0;
  37        else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
  38                return 2;
  39
  40        return 1;
  41}
  42EXPORT_SYMBOL(__cmpdi2);
  43