arch/h8300/lib/lshrdi3.c

   1 #include "libgcc.h"
   2
   3 DWtype __lshrdi3(DWtype u, word_type b)
   4 {
   5         const DWunion uu = {.ll = u};
   6         const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
   7         DWunion w;
   8
   9         if (b == 0)
  10                 return u;
  11
  12         if (bm <= 0) {
  13                 w.s.high = 0;
  14                 w.s.low = (UWtype) uu.s.high >> -bm;
  15         } else {
  16                 const UWtype carries = (UWtype) uu.s.high << bm;
  17
  18                 w.s.high = (UWtype) uu.s.high >> b;
  19                 w.s.low = ((UWtype) uu.s.low >> b) | carries;
  20         }
  21
  22         return w.ll;
  23 }