1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -msse4" } */
       3  /* { dg-final { scan-assembler "ptest\[ \\t\]" } } */
       4  /* { dg-final { scan-assembler-not "pxor\[ \\t\]" } } */
       5  /* { dg-final { scan-assembler-not "pcmpeqb\[ \\t\]" } } */
       6  /* { dg-final { scan-assembler-not "pmovmskb\[ \\t\]" } } */
       7  
       8  #include <smmintrin.h>
       9  
      10  int is_zero(__m128i x)
      11  {
      12    return _mm_movemask_epi8(_mm_cmpeq_epi8(x, _mm_setzero_si128())) == 0xffff;
      13  }