lib/ucmpdi2.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/module.h>
  18 #include <linux/libgcc.h>
  19
  20 word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
  21 {
  22         const DWunion au = {.ll = a};
  23         const DWunion bu = {.ll = b};
  24
  25         if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
  26                 return 0;
  27         else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
  28                 return 2;
  29         if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
  30                 return 0;
  31         else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
  32                 return 2;
  33         return 1;
  34 }
  35 EXPORT_SYMBOL(__ucmpdi2);