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

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target p8vector_hw } */
   3 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   4
   5 #include <altivec.h>
   6 void abort ();
   7
   8 #define N 4096
   9 int ca[N] __attribute__((aligned(16)));
  10 int cb[N] __attribute__((aligned(16)));
  11 int cc[N] __attribute__((aligned(16)));
  12 int cd[N] __attribute__((aligned(16)));
  13 int hey;
  14
  15 __attribute__((noinline)) void foo ()
  16 {
  17   int i;
  18   vector int va, vb, vc, vd, tmp;
  19   vector unsigned int threes = vec_splat_u32(3);
  20   for (i = 0; i < N; i+=4) {
  21     vb = vec_vsx_ld (0, &cb[i]);
  22     vc = vec_vsx_ld (0, &cc[i]);
  23     vd = vec_vsx_ld (0, &cd[i]);
  24     tmp = vec_add (vb, vc);
  25     tmp = vec_sub (tmp, vd);
  26     tmp = vec_sra (tmp, threes);
  27     hey = tmp[3];
  28     vec_vsx_st (tmp, 0, &ca[i]);
  29   }
  30 }
  31
  32 __attribute__((noinline)) void init ()
  33 {
  34   int i;
  35   for (i = 0; i < N; ++i) {
  36     cb[i] = 3 * i - 2048;
  37     cc[i] = -5 * i + 93;
  38     cd[i] = i + 14;
  39   }
  40 }
  41
  42 int main ()
  43 {
  44   int i;
  45   init ();
  46   foo ();
  47   for (i = 0; i < N; ++i)
  48     if (ca[i] != (-3 * i - 1969) >> 3)
  49       abort ();
  50   if (hey != ca[N-1])
  51     abort ();
  52   return 0;
  53 }