gcc/testsuite/gcc.target/powerpc/swaps-p8-11.c

   1 /* { dg-do run { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   3
   4 #include <altivec.h>
   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 int hey;
  13
  14 __attribute__((noinline)) void foo ()
  15 {
  16   int i;
  17   vector int va, vb, vc, vd, tmp;
  18   vector unsigned int threes = vec_splat_u32(3);
  19   for (i = 0; i < N; i+=4) {
  20     vb = vec_vsx_ld (0, &cb[i]);
  21     vc = vec_vsx_ld (0, &cc[i]);
  22     vd = vec_vsx_ld (0, &cd[i]);
  23     tmp = vec_add (vb, vc);
  24     tmp = vec_sub (tmp, vd);
  25     tmp = vec_sra (tmp, threes);
  26     hey = tmp[3];
  27     vec_vsx_st (tmp, 0, &ca[i]);
  28   }
  29 }
  30
  31 __attribute__((noinline)) void init ()
  32 {
  33   int i;
  34   for (i = 0; i < N; ++i) {
  35     cb[i] = 3 * i - 2048;
  36     cc[i] = -5 * i + 93;
  37     cd[i] = i + 14;
  38   }
  39 }
  40
  41 int main ()
  42 {
  43   int i;
  44   init ();
  45   foo ();
  46   for (i = 0; i < N; ++i)
  47     if (ca[i] != (-3 * i - 1969) >> 3)
  48       abort ();
  49   if (hey != ca[N-1])
  50     abort ();
  51   return 0;
  52 }