gcc/testsuite/gcc.target/powerpc/subfus-2.c

   1 /* { dg-do compile { target lp64 } } */
   2 /* { dg-require-effective-target powerpc_future_ok } */
   3 /* { dg-options "-mdejagnu-cpu=future -O2" } */
   4
   5 /* Test whether the saturating subtract built-in generates subwus for 64-bit
   6    subtracts.  */
   7
   8 long do_sat_long  (long  a, long  b)
   9 {
  10   return __builtin_saturate_subtract64 (a, b);          /* subwus  */
  11 }
  12
  13 long do_sat_long_dot  (long  a, long  b, long  *p)
  14 {
  15   long  r = __builtin_saturate_subtract64 (a, b);       /* subwus.  */
  16   if (r == 0)
  17     *p = 0;
  18
  19   return r;
  20 }
  21
  22 void do_sat_long_dot2  (long  a, long  b, long  *p, long *q)
  23 {
  24   if (__builtin_saturate_subtract64 (a, b))             /* subwus.  */
  25     *p = 0;
  26
  27   *q = a + b;
  28   return;
  29 }
  30
  31 /* { dg-final { scan-assembler     {\msubdus\M} } } */
  32 /* { dg-final { scan-assembler-not {\msubf\M}   } } */