25 #  define CHOP(a) \  argument
27         unsigned long tmp = a >> 16; \
28         a &= 0xffffUL; \
29         a += (tmp << 4) - tmp; \
31 #  define MOD28(a) \  argument
33         CHOP(a); \
34         if (a >= BASE) a -= BASE; \
36 #  define MOD(a) \  argument
38         CHOP(a); \
39         MOD28(a); \
41 #  define MOD63(a) \  argument
43         z_off64_t tmp = a >> 32; \
44         a &= 0xffffffffL; \
45         a += (tmp << 8) - (tmp << 5) + tmp; \
46         tmp = a >> 16; \
47         a &= 0xffffL; \
48         a += (tmp << 4) - tmp; \
49         tmp = a >> 16; \
50         a &= 0xffffL; \
51         a += (tmp << 4) - tmp; \
52         if (a >= BASE) a -= BASE; \
55 #  define MOD(a) a %= BASE  argument
56 #  define MOD28(a) a %= BASE  argument
57 #  define MOD63(a) a %= BASE  argument