arch/sh/lib/ashrdi3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/module.h>
   3
   4 #include "libgcc.h"
   5
   6 long long __ashrdi3(long long u, word_type b)
   7 {
   8         DWunion uu, w;
   9         word_type bm;
  10
  11         if (b == 0)
  12                 return u;
  13
  14         uu.ll = u;
  15         bm = 32 - b;
  16
  17         if (bm <= 0) {
  18                 /* w.s.high = 1..1 or 0..0 */
  19                 w.s.high =
  20                     uu.s.high >> 31;
  21                 w.s.low = uu.s.high >> -bm;
  22         } else {
  23                 const unsigned int carries = (unsigned int) uu.s.high << bm;
  24
  25                 w.s.high = uu.s.high >> b;
  26                 w.s.low = ((unsigned int) uu.s.low >> b) | carries;
  27         }
  28
  29         return w.ll;
  30 }
  31
  32 EXPORT_SYMBOL(__ashrdi3);