gcc/testsuite/gcc.dg/torture/pr40470-2.c

   1 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
   2 /* { dg-options "-msse4" } */
   3 #include <nmmintrin.h>
   4 __m128i load (char *);
   5 char *
   6 foo (const unsigned char *s1, const unsigned char *s2,
   7      int bmsk, __m128i frag2)
   8 {
   9   int len = 0;
  10   char *p1 = (char  *) s1;
  11   char *p2 = (char  *) s2;
  12   __m128i frag1, fruc, mask;
  13   int cmp_c, cmp_s;
  14   if( !p2[0]) return (char *) s1;
  15   if( !p1[0] ) return NULL;
  16   if( p2[1]) frag2 = load (p2);
  17   frag1 = load (p1);
  18   fruc = _mm_loadu_si128 ((__m128i *) s1);
  19   mask = _mm_cmpistrm(fruc, frag2, 0x44);
  20   frag2 = _mm_blendv_epi8(frag2, mask, mask);
  21   frag1 = _mm_blendv_epi8(frag1, mask, mask);
  22   cmp_c = _mm_cmpistrc(frag2, frag1, 0x0c);
  23   cmp_s = _mm_cmpistrs(frag2, frag1, 0x0c);
  24   if( cmp_s  & cmp_c  )
  25     __asm("bsfl %[bmsk], %[len]" : [len] "=r" (len) : [bmsk] "r" (bmsk) );
  26   return p2 + len;
  27 }