gcc/testsuite/gcc.target/powerpc/swaps-p8-8.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 signed char ca[N] __attribute__((aligned(16)));
   9 signed char cb[N] __attribute__((aligned(16)));
  10 signed char cc[N] __attribute__((aligned(16)));
  11
  12 __attribute__((noinline)) void foo ()
  13 {
  14   int i;
  15   for (i = 0; i < N; i++) {
  16     ca[i] = cb[i] - cc[i];
  17   }
  18 }
  19
  20 __attribute__((noinline)) void init ()
  21 {
  22   int i, ii;
  23   for (i = 0, ii = 0; i < N; ++i, ii = (ii + 1) % 128) {
  24     cb[i] = ii - 128;
  25     cc[i] = ii/2 - 64;
  26   }
  27 }
  28
  29 int main ()
  30 {
  31   int i, ii;
  32   init ();
  33   foo ();
  34   for (i = 0; i < N; ++i) {
  35     ii = i % 128;
  36     if (ca[i] != ii - ii/2 - 64)
  37       abort ();
  38   }
  39   return 0;
  40 }