gcc/testsuite/gcc.target/powerpc/swaps-p8-27.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3 " } */
   3 /* { dg-final { scan-assembler-times "lxvd2x" 2 } } */
   4 /* { dg-final { scan-assembler-times "stxvd2x" 1 } } */
   5 /* { dg-final { scan-assembler-times "xxpermdi" 3 } } */
   6
   7 /* Verify that swap optimization works correctly for a VSX direct splat.
   8    The three xxpermdi's that are generated correspond to two splats
   9    and the __builtin_vsx_xxpermdi.  */
  10
  11 int printf (const char *__restrict __format, ...);
  12 typedef double __m128d __attribute__ ((__vector_size__ (16), __may_alias__));
  13
  14 double s1[] = {2134.3343, 6678.346};
  15 double s2[] = {41124.234, 6678.346};
  16 long long dd[] = {1, 2}, d[2];
  17 union{long long l[2]; double d[2];} e;
  18
  19 void
  20 foo ()
  21 {
  22   __m128d source1, source2, dest;
  23   __m128d a, b, c;
  24
  25   e.d[1] = s1[1];
  26   e.l[0] = !__builtin_isunordered(s1[0], s2[0])
  27     && s1[0] == s2[0] ? -1 : 0;
  28   source1 = __builtin_vec_vsx_ld (0, s1);
  29   source2 = __builtin_vec_vsx_ld (0, s2);
  30   a = __builtin_vec_splat (source1, 0);
  31   b = __builtin_vec_splat (source2, 0);
  32   c = (__m128d)__builtin_vec_cmpeq (a, b);
  33   dest = __builtin_vsx_xxpermdi (source1, c, 1);
  34   *(__m128d *)d = dest;
  35 }