gcc/testsuite/gcc.target/powerpc/swaps-p8-12.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-not "xxpermdi" } } */
   6
   7 #include "altivec.h"
   8 void abort ();
   9
  10 #define N 4096
  11 int ca[N] __attribute__((aligned(16)));
  12 int cb[N] __attribute__((aligned(16)));
  13 int cc[N] __attribute__((aligned(16)));
  14 int cd[N] __attribute__((aligned(16)));
  15 int hey;
  16
  17 __attribute__((noinline)) void foo ()
  18 {
  19   int i;
  20   vector int va, vb, vc, vd, tmp;
  21   vector unsigned int threes = vec_splat_u32(3);
  22   for (i = 0; i < N; i+=4) {
  23     vb = vec_vsx_ld (0, &cb[i]);
  24     vc = vec_vsx_ld (0, &cc[i]);
  25     vd = vec_vsx_ld (0, &cd[i]);
  26     tmp = vec_add (vb, vc);
  27     tmp = vec_sub (tmp, vd);
  28     tmp = vec_sra (tmp, threes);
  29     hey = tmp[3];
  30     vec_vsx_st (tmp, 0, &ca[i]);
  31   }
  32 }
  33
  34 __attribute__((noinline)) void init ()
  35 {
  36   int i;
  37   for (i = 0; i < N; ++i) {
  38     cb[i] = 3 * i - 2048;
  39     cc[i] = -5 * i + 93;
  40     cd[i] = i + 14;
  41   }
  42 }
  43
  44 int main ()
  45 {
  46   int i;
  47   init ();
  48   foo ();
  49   for (i = 0; i < N; ++i)
  50     if (ca[i] != (-3 * i - 1969) >> 3)
  51       abort ();
  52   if (hey != ca[N-1])
  53     abort ();
  54   return 0;
  55 }