gcc/testsuite/gcc.target/powerpc/swaps-p8-10.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target p8vector_hw } */
   3 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   4
   5 void abort ();
   6
   7 #define N 4096
   8 int ca[N] __attribute__((aligned(16)));
   9 int cb[N] __attribute__((aligned(16)));
  10 int cc[N] __attribute__((aligned(16)));
  11 int cd[N] __attribute__((aligned(16)));
  12
  13 __attribute__((noinline)) void foo ()
  14 {
  15   int i;
  16   for (i = 0; i < N; i++) {
  17     ca[i] = ((cb[i] + cc[i]) * cd[i]) >> 3;
  18   }
  19 }
  20
  21 __attribute__((noinline)) void init ()
  22 {
  23   int i;
  24   for (i = 0; i < N; ++i) {
  25     cb[i] = 3 * i - 2048;
  26     cc[i] = -5 * i + 93;
  27     cd[i] = i % 2 ? 1 : -1;
  28   }
  29 }
  30
  31 int main ()
  32 {
  33   int i;
  34   init ();
  35   foo ();
  36   for (i = 0; i < N; ++i)
  37     if (i % 2 == 1 && ca[i] != (-2 * i - 1955) >> 3)
  38       abort ();
  39     else if (i % 2 == 0 && ca[i] != (1955 + 2 * i) >> 3)
  40       abort ();
  41   return 0;
  42 }