arch/h8300/lib/ashldi3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "libgcc.h"
   3
   4 DWtype
   5 __ashldi3(DWtype u, word_type b)
   6 {
   7         const DWunion uu = {.ll = u};
   8         const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
   9         DWunion w;
  10
  11         if (b == 0)
  12                 return u;
  13
  14         if (bm <= 0) {
  15                 w.s.low = 0;
  16                 w.s.high = (UWtype) uu.s.low << -bm;
  17         } else {
  18                 const UWtype carries = (UWtype) uu.s.low >> bm;
  19
  20                 w.s.low = (UWtype) uu.s.low << b;
  21                 w.s.high = ((UWtype) uu.s.high << b) | carries;
  22         }
  23
  24         return w.ll;
  25 }