git.sur5r.net Git - u-boot/blob - arch/mips/lib/ashrdi3.c

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