gcc/testsuite/gcc.target/powerpc/swaps-p8-3.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
   3 /* { dg-options "-mcpu=power8 -O3" } */
   4 /* { dg-final { scan-assembler "lxvd2x" } } */
   5 /* { dg-final { scan-assembler "stxvd2x" } } */
   6 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   7
   8 void abort ();
   9
  10 #define N 4096
  11 signed char ca[N] __attribute__((aligned(16)));
  12 signed char cb[N] __attribute__((aligned(16)));
  13 signed char cc[N] __attribute__((aligned(16)));
  14
  15 __attribute__((noinline)) void foo ()
  16 {
  17   int i;
  18   for (i = 0; i < N; i++) {
  19     ca[i] = cb[i] - cc[i];
  20   }
  21 }
  22
  23 __attribute__((noinline)) void init ()
  24 {
  25   int i, ii;
  26   for (i = 0, ii = 0; i < N; ++i, ii = (ii + 1) % 128) {
  27     cb[i] = ii - 128;
  28     cc[i] = ii/2 - 64;
  29   }
  30 }
  31
  32 int main ()
  33 {
  34   int i, ii;
  35   init ();
  36   foo ();
  37   for (i = 0; i < N; ++i) {
  38     ii = i % 128;
  39     if (ca[i] != ii - ii/2 - 64)
  40       abort ();
  41   }
  42   return 0;
  43 }