arch/parisc/lib/libgcc/__muldi3.c

   1 #include "libgcc.h"
   2
   3 union DWunion {
   4         struct {
   5                 s32 high;
   6                 s32 low;
   7         } s;
   8         s64 ll;
   9 };
  10
  11 s64 __muldi3(s64 u, s64 v)
  12 {
  13         const union DWunion uu = { .ll = u };
  14         const union DWunion vv = { .ll = v };
  15         union DWunion w = { .ll = __umulsidi3(uu.s.low, vv.s.low) };
  16
  17         w.s.high += ((u32)uu.s.low * (u32)vv.s.high
  18                 + (u32)uu.s.high * (u32)vv.s.low);
  19
  20         return w.ll;
  21 }
  22 EXPORT_SYMBOL(__muldi3);