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

   1 /* { dg-do run { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   3
   4 void abort ();
   5
   6 #define N 4096
   7 int ca[N] __attribute__((aligned(16)));
   8 int cb[N] __attribute__((aligned(16)));
   9 int cc[N] __attribute__((aligned(16)));
  10 int cd[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]) * cd[i]) >> 3;
  17   }
  18 }
  19
  20 __attribute__((noinline)) void init ()
  21 {
  22   int i;
  23   for (i = 0; i < N; ++i) {
  24     cb[i] = 3 * i - 2048;
  25     cc[i] = -5 * i + 93;
  26     cd[i] = i % 2 ? 1 : -1;
  27   }
  28 }
  29
  30 int main ()
  31 {
  32   int i;
  33   init ();
  34   foo ();
  35   for (i = 0; i < N; ++i)
  36     if (i % 2 == 1 && ca[i] != (-2 * i - 1955) >> 3)
  37       abort ();
  38     else if (i % 2 == 0 && ca[i] != (1955 + 2 * i) >> 3)
  39       abort ();
  40   return 0;
  41 }