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111
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1 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
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2 /* { dg-options "-msse4" } */
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3 #include <nmmintrin.h>
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4 __m128i load (char *);
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5 char *
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6 foo (const unsigned char *s1, const unsigned char *s2,
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7 int bmsk, __m128i frag2)
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8 {
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9 int len = 0;
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10 char *p1 = (char *) s1;
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11 char *p2 = (char *) s2;
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12 __m128i frag1, fruc1, fruc2, mask1, mask2;
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13 int cmp_c, cmp_s;
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14 if( !p2[0]) return (char *) s1;
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15 if( !p1[0] ) return NULL;
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16 if( p2[1]) frag2 = load (p2);
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17 frag1 = load (p1);
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18 fruc1 = _mm_loadu_si128 ((__m128i *) s1);
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19 fruc2 = _mm_loadu_si128 ((__m128i *) s2);
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20 mask1 = _mm_cmpistrm(fruc1, frag2, 0x44);
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21 mask2 = _mm_cmpistrm(fruc2, frag1, 0x14);
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22 frag2 = _mm_blendv_epi8(frag2, mask1, mask2);
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23 frag1 = _mm_blendv_epi8(frag1, mask2, mask1);
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24 cmp_c = _mm_cmpistrc(frag2, frag1, 0x0c);
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25 cmp_s = _mm_cmpistrs(frag2, frag1, 0x0c);
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26 if( cmp_s & cmp_c )
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27 __asm("bsfl %[bmsk], %[len]" : [len] "=r" (len) : [bmsk] "r" (bmsk) );
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28 return p2 + len;
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29 }
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