gcc/testsuite/gcc.target/powerpc/swaps-p8-12.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
   3 /* { dg-options "-mcpu=power8 -O3" } */
   4 /* { dg-final { scan-assembler "lxvd2x" } } */
   5 /* { dg-final { scan-assembler "stxvd2x" } } */
   6 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   7
   8 #include "altivec.h"
   9 void abort ();
  10
  11 #define N 4096
  12 int ca[N] __attribute__((aligned(16)));
  13 int cb[N] __attribute__((aligned(16)));
  14 int cc[N] __attribute__((aligned(16)));
  15 int cd[N] __attribute__((aligned(16)));
  16 int hey;
  17
  18 __attribute__((noinline)) void foo ()
  19 {
  20   int i;
  21   vector int va, vb, vc, vd, tmp;
  22   vector unsigned int threes = vec_splat_u32(3);
  23   for (i = 0; i < N; i+=4) {
  24     vb = vec_vsx_ld (0, &cb[i]);
  25     vc = vec_vsx_ld (0, &cc[i]);
  26     vd = vec_vsx_ld (0, &cd[i]);
  27     tmp = vec_add (vb, vc);
  28     tmp = vec_sub (tmp, vd);
  29     tmp = vec_sra (tmp, threes);
  30     hey = tmp[3];
  31     vec_vsx_st (tmp, 0, &ca[i]);
  32   }
  33 }
  34
  35 __attribute__((noinline)) void init ()
  36 {
  37   int i;
  38   for (i = 0; i < N; ++i) {
  39     cb[i] = 3 * i - 2048;
  40     cc[i] = -5 * i + 93;
  41     cd[i] = i + 14;
  42   }
  43 }
  44
  45 int main ()
  46 {
  47   int i;
  48   init ();
  49   foo ();
  50   for (i = 0; i < N; ++i)
  51     if (ca[i] != (-3 * i - 1969) >> 3)
  52       abort ();
  53   if (hey != ca[N-1])
  54     abort ();
  55   return 0;
  56 }