arch/h8300/lib/ashldi3.c

   1 #include "libgcc.h"
   2
   3 DWtype
   4 __ashldi3(DWtype u, word_type b)
   5 {
   6         const DWunion uu = {.ll = u};
   7         const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
   8         DWunion w;
   9
  10         if (b == 0)
  11                 return u;
  12
  13         if (bm <= 0) {
  14                 w.s.low = 0;
  15                 w.s.high = (UWtype) uu.s.low << -bm;
  16         } else {
  17                 const UWtype carries = (UWtype) uu.s.low >> bm;
  18
  19                 w.s.low = (UWtype) uu.s.low << b;
  20                 w.s.high = ((UWtype) uu.s.high << b) | carries;
  21         }
  22
  23         return w.ll;
  24 }