1
2byte_match_count2 (buf, n, xm, m1, m2, m3, m4)
3     unsigned *buf;
4     unsigned n;
5     unsigned xm;
6     unsigned m1, m2, m3, m4;
7{
8  unsigned w, cnt = 0;
9  unsigned *bp;
10
11  n /= 4;
12
13  bp = buf;
14  while (bp < buf + n)
15    {
16      w = *bp++;
17      w ^= xm;
18      cnt += ((m1 & w) == 0);
19      cnt += ((m2 & w) == 0);
20      cnt += ((m3 & w) == 0);
21      cnt += ((m4 & w) == 0);
22
23      w = *bp++;
24      w ^= xm;
25      cnt += ((m1 & w) == 0);
26      cnt += ((m2 & w) == 0);
27      cnt += ((m3 & w) == 0);
28      cnt += ((m4 & w) == 0);
29
30      w = *bp++;
31      w ^= xm;
32      cnt += ((m1 & w) == 0);
33      cnt += ((m2 & w) == 0);
34      cnt += ((m3 & w) == 0);
35      cnt += ((m4 & w) == 0);
36
37      w = *bp++;
38      w ^= xm;
39      cnt += ((m1 & w) == 0);
40      cnt += ((m2 & w) == 0);
41      cnt += ((m3 & w) == 0);
42      cnt += ((m4 & w) == 0);
43    }
44  return cnt;
45}
46