gcc/testsuite/gcc.target/powerpc/swaps-p8-13.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 long long ca[N] __attribute__((aligned(16)));
   9 long long cb[N] __attribute__((aligned(16)));
  10 long long cc[N] __attribute__((aligned(16)));
  11 long long cd[N] __attribute__((aligned(16)));
  12 long long x;
  13
  14 __attribute__((noinline)) void foo ()
  15 {
  16   int i;
  17   vector long long va, vb, vc, vd, tmp;
  18   volatile unsigned long long three = 3;
  19   vector unsigned long long threes = vec_splats (three);
  20   for (i = 0; i < N; i+=2) {
  21     vb = vec_vsx_ld (0, (vector long long *)&cb[i]);
  22     vc = vec_vsx_ld (0, (vector long long *)&cc[i]);
  23     vd = vec_vsx_ld (0, (vector long long *)&cd[i]);
  24     tmp = vec_add (vb, vc);
  25     tmp = vec_sub (tmp, vd);
  26     tmp = vec_sra (tmp, threes);
  27     x = vec_extract (tmp, 0);
  28     vec_vsx_st (tmp, 0, (vector long long *)&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 (x != ca[N-1])
  51     abort ();
  52   return 0;
  53 }