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

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