arch/s390/lib/ucmpdi2.c

   1 #include <linux/module.h>
   2
   3 union ull_union {
   4         unsigned long long ull;
   5         struct {
   6                 unsigned int high;
   7                 unsigned int low;
   8         } ui;
   9 };
  10
  11 int __ucmpdi2(unsigned long long a, unsigned long long b)
  12 {
  13         union ull_union au = {.ull = a};
  14         union ull_union bu = {.ull = b};
  15
  16         if (au.ui.high < bu.ui.high)
  17                 return 0;
  18         else if (au.ui.high > bu.ui.high)
  19                 return 2;
  20         if (au.ui.low < bu.ui.low)
  21                 return 0;
  22         else if (au.ui.low > bu.ui.low)
  23                 return 2;
  24         return 1;
  25 }
  26 EXPORT_SYMBOL(__ucmpdi2);