release/src-rt-6.x/linux/linux-2.6/arch/mips/lib/ashrdi3.c

   1 #include <linux/module.h>
   2
   3 #include "libgcc.h"
   4
   5 long long __ashrdi3(long long u, word_type b)
   6 {
   7         DWunion uu, w;
   8         word_type bm;
   9
  10         if (b == 0)
  11                 return u;
  12
  13         uu.ll = u;
  14         bm = 32 - b;
  15
  16         if (bm <= 0) {
  17                 /* w.s.high = 1..1 or 0..0 */
  18                 w.s.high =
  19                     uu.s.high >> 31;
  20                 w.s.low = uu.s.high >> -bm;
  21         } else {
  22                 const unsigned int carries = (unsigned int) uu.s.high << bm;
  23
  24                 w.s.high = uu.s.high >> b;
  25                 w.s.low = ((unsigned int) uu.s.low >> b) | carries;
  26         }
  27
  28         return w.ll;
  29 }
  30
  31 EXPORT_SYMBOL(__ashrdi3);