LXR linux/arch/sh/lib/ashrdi3.c

   1// SPDX-License-Identifier: GPL-2.0
   2#include <linux/module.h>
   3
   4#include "libgcc.h"
   5
   6long 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
  32EXPORT_SYMBOL(__ashrdi3);
  33