1  /* { dg-do run } */
       2  /* { dg-require-effective-target 3dnow } */
       3  /* { dg-options "-O2 -m3dnow" } */
       4  
       5  #include "mmx-3dnow-check.h"
       6  
       7  #include <mm3dnow.h>
       8  
       9  typedef union {
      10    float f[2];
      11    __m64 v;
      12  } vec_t;
      13  
      14  void __attribute__ ((noinline))
      15  Butterfly_3 (__m64 * D, __m64 SC)
      16  {
      17    __m64 T, T1;
      18  
      19    T = _m_pfmul (D[1], SC);
      20    T1 = D[0];
      21    D[0] = _m_pfadd (T1, T);
      22    D[1] = _m_pfsub (T1, T);
      23  }
      24  
      25  static void
      26  mmx_3dnow_test (void)
      27  {
      28    vec_t D[2] = { { .f = { 2.0f, 3.0f } },
      29  		 { .f = { 4.0f, 5.0f } } };
      30  
      31    const vec_t SC = { .f = { 1.0f, 1.0f } };
      32  
      33    Butterfly_3 (&D[0].v, SC.v);
      34    _m_femms ();
      35  
      36    if (D[1].f[0] != -2.0f || D[1].f[1] != -2.0f)
      37      abort ();
      38  }