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/* { dg-do compile { target i?86-*-* x86_64-*-* } } */

/* { dg-options "-msse4" } */

#include <nmmintrin.h>

__m128i load (char *);

char *

foo (const unsigned char *s1, const unsigned char *s2,

     int bmsk, __m128i frag2)

{

  int len = 0;

  char *p1 = (char  *) s1;

  char *p2 = (char  *) s2;

  __m128i frag1, fruc1, fruc2, mask1, mask2;

  int cmp_c, cmp_s;

  if( !p2[0]) return (char *) s1;

  if( !p1[0] ) return NULL;

  if( p2[1]) frag2 = load (p2);

  frag1 = load (p1);

  fruc1 = _mm_loadu_si128 ((__m128i *) s1);

  fruc2 = _mm_loadu_si128 ((__m128i *) s2);

  mask1 = _mm_cmpistrm(fruc1, frag2, 0x44);

  mask2 = _mm_cmpistrm(fruc2, frag1, 0x14);

  frag2 = _mm_blendv_epi8(frag2, mask1, mask2);

  frag1 = _mm_blendv_epi8(frag1, mask2, mask1);

  cmp_c = _mm_cmpistrc(frag2, frag1, 0x0c);

  cmp_s = _mm_cmpistrs(frag2, frag1, 0x0c);

  if( cmp_s  & cmp_c  )

    __asm("bsfl %[bmsk], %[len]" : [len] "=r" (len) : [bmsk] "r" (bmsk) );

  return p2 + len;

}