gcc/testsuite/gcc.target/powerpc/swaps-p8-14.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   3 /* { dg-final { scan-assembler "lxvd2x" } } */
   4 /* { dg-final { scan-assembler "stxvd2x" } } */
   5 /* { dg-final { scan-assembler "stxsdx" } } */
   6 /* { dg-final { scan-assembler-times "xxpermdi" 1 } } */
   7
   8 /* The only xxpermdi expected is for the vec_splats.  */
   9
  10 #include <altivec.h>
  11 void abort ();
  12
  13 #define N 4096
  14 long long ca[N] __attribute__((aligned(16)));
  15 long long cb[N] __attribute__((aligned(16)));
  16 long long cc[N] __attribute__((aligned(16)));
  17 long long cd[N] __attribute__((aligned(16)));
  18 long long x;
  19
  20 __attribute__((noinline)) void foo ()
  21 {
  22   int i;
  23   vector long long va, vb, vc, vd, tmp;
  24   volatile unsigned long long three = 3;
  25   vector unsigned long long threes = vec_splats (three);
  26   for (i = 0; i < N; i+=2) {
  27     vb = vec_vsx_ld (0, (vector long long *)&cb[i]);
  28     vc = vec_vsx_ld (0, (vector long long *)&cc[i]);
  29     vd = vec_vsx_ld (0, (vector long long *)&cd[i]);
  30     tmp = vec_add (vb, vc);
  31     tmp = vec_sub (tmp, vd);
  32     tmp = vec_sra (tmp, threes);
  33     x = vec_extract (tmp, 0);
  34     vec_vsx_st (tmp, 0, (vector long long *)&ca[i]);
  35   }
  36 }
  37
  38 int main ()
  39 {
  40   foo ();
  41   return 0;
  42 }