Page 225 - ARM 64 Bit Assembly Language

Integer mathematics 213

14
15 /* Bigints can be converted to integers. If it won’t fit in an
16 integer, the program exits */
17 int bigint_to_int(bigint b);
18
19 /* To print a bigint, you must convert it to a string */
20 char *bigint_to_str(bigint b);
21
22 /* Memory management */
23 bigint bigint_alloc(int chunks);
24 void bigint_free(bigint b);
25
26 /* There are seven arithmetic operations */
27 bigint bigint_add(bigint l, bigint r);
28 bigint bigint_sub(bigint l, bigint r);
29 bigint bigint_mul(bigint l, bigint r);
30 bigint bigint_div(bigint l, bigint r);
31 bigint bigint_negate(bigint b);
32 bigint bigint_abs(bigint b);
33 bigint bigint_sqrt(bigint b);
34
35 /* Two shift operations (all bigints are signed, so there is no
36 such thing as an unsigned shift right) */
37 bigint bigint_shift_left(bigint l, int shamt);
38 bigint bigint_shift_right(bigint l, int shamt);
39
40 /* There are seven comparison operations. They return 1 for true,
41 or 0 for false. */
42 int bigint_is_zero(bigint b);
43 int bigint_le(bigint l, bigint r);
44 int bigint_lt(bigint l, bigint r);
45 int bigint_ge(bigint l, bigint r);
46 int bigint_gt(bigint l, bigint r);
47 int bigint_eq(bigint l, bigint r);
48 int bigint_ne(bigint l, bigint r);
49
50 /* Low-level comparison. bigint_cmp compares two bigints
51 returns -1 if l<r
52 returns 0 if l==r
53 returns 1 if l>r */
54 int bigint_cmp(bigint l, bigint r);
55
56 /* Functions for binary input/output */
57 void bigint_write_binary(FILE *f, bigint x);
58 bigint bigint_read_binary(FILE *f);
59
60 #endif