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1 | | /* mpz_add, mpz_sub -- add or subtract integers. |
2 | | |
3 | | Copyright 1991, 1993, 1994, 1996, 2000, 2001, 2011, 2012, 2020 Free |
4 | | Software Foundation, Inc. |
5 | | |
6 | | This file is part of the GNU MP Library. |
7 | | |
8 | | The GNU MP Library is free software; you can redistribute it and/or modify |
9 | | it under the terms of either: |
10 | | |
11 | | * the GNU Lesser General Public License as published by the Free |
12 | | Software Foundation; either version 3 of the License, or (at your |
13 | | option) any later version. |
14 | | |
15 | | or |
16 | | |
17 | | * the GNU General Public License as published by the Free Software |
18 | | Foundation; either version 2 of the License, or (at your option) any |
19 | | later version. |
20 | | |
21 | | or both in parallel, as here. |
22 | | |
23 | | The GNU MP Library is distributed in the hope that it will be useful, but |
24 | | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
25 | | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
26 | | for more details. |
27 | | |
28 | | You should have received copies of the GNU General Public License and the |
29 | | GNU Lesser General Public License along with the GNU MP Library. If not, |
30 | | see https://www.gnu.org/licenses/. */ |
31 | | |
32 | | #include "gmp-impl.h" |
33 | | |
34 | | |
35 | | #ifdef OPERATION_add |
36 | | #define FUNCTION mpz_add |
37 | | #define VARIATION |
38 | | #endif |
39 | | #ifdef OPERATION_sub |
40 | | #define FUNCTION mpz_sub |
41 | 8.05k | #define VARIATION - |
42 | | #endif |
43 | | |
44 | | #ifndef FUNCTION |
45 | | Error, need OPERATION_add or OPERATION_sub |
46 | | #endif |
47 | | |
48 | | |
49 | | void |
50 | | FUNCTION (mpz_ptr w, mpz_srcptr u, mpz_srcptr v) |
51 | 39.8k | { |
52 | 39.8k | mp_srcptr up, vp; |
53 | 39.8k | mp_ptr wp; |
54 | 39.8k | mp_size_t usize, vsize, wsize; |
55 | 39.8k | mp_size_t abs_usize; |
56 | 39.8k | mp_size_t abs_vsize; |
57 | | |
58 | 39.8k | usize = SIZ(u); |
59 | 39.8k | vsize = VARIATION SIZ(v); |
60 | 39.8k | abs_usize = ABS (usize); |
61 | 39.8k | abs_vsize = ABS (vsize); |
62 | | |
63 | 39.8k | if (abs_usize < abs_vsize) |
64 | 9.40k | { |
65 | | /* Swap U and V. */ |
66 | 9.40k | MPZ_SRCPTR_SWAP (u, v); |
67 | 9.40k | MP_SIZE_T_SWAP (usize, vsize); |
68 | 9.40k | MP_SIZE_T_SWAP (abs_usize, abs_vsize); |
69 | 9.40k | } |
70 | | |
71 | | /* True: ABS_USIZE >= ABS_VSIZE. */ |
72 | | |
73 | | /* If not space for w (and possible carry), increase space. */ |
74 | 39.8k | wsize = abs_usize + 1; |
75 | 39.8k | wp = MPZ_REALLOC (w, wsize); |
76 | | |
77 | | /* These must be after realloc (u or v may be the same as w). */ |
78 | 39.8k | up = PTR(u); |
79 | 39.8k | vp = PTR(v); |
80 | | |
81 | 39.8k | if ((usize ^ vsize) < 0) |
82 | 9.40k | { |
83 | | /* U and V have different sign. Need to compare them to determine |
84 | | which operand to subtract from which. */ |
85 | | |
86 | | /* This test is right since ABS_USIZE >= ABS_VSIZE. */ |
87 | 9.40k | if (abs_usize != abs_vsize) |
88 | 4.47k | { |
89 | 4.47k | mpn_sub (wp, up, abs_usize, vp, abs_vsize); |
90 | 4.47k | wsize = abs_usize; |
91 | 4.47k | MPN_NORMALIZE_NOT_ZERO (wp, wsize); |
92 | 4.47k | if (usize < 0) |
93 | 4.02k | wsize = -wsize; |
94 | 4.47k | } |
95 | 4.92k | else |
96 | 4.92k | { |
97 | 4.92k | int cmp = mpn_cmp (up, vp, abs_usize); |
98 | 4.92k | if (cmp < 0) |
99 | 4.92k | { |
100 | 4.92k | mpn_sub_n (wp, vp, up, abs_usize); |
101 | 4.92k | wsize = abs_usize; |
102 | 4.92k | MPN_NORMALIZE_NOT_ZERO (wp, wsize); |
103 | 4.92k | if (usize >= 0) |
104 | 0 | wsize = -wsize; |
105 | 4.92k | } |
106 | 0 | else if (cmp > 0) |
107 | 0 | { |
108 | 0 | mpn_sub_n (wp, up, vp, abs_usize); |
109 | 0 | wsize = abs_usize; |
110 | 0 | MPN_NORMALIZE_NOT_ZERO (wp, wsize); |
111 | 0 | if (usize < 0) |
112 | 0 | wsize = -wsize; |
113 | 0 | } |
114 | 0 | else |
115 | 0 | wsize = 0; |
116 | 4.92k | } |
117 | 9.40k | } |
118 | 30.4k | else |
119 | 30.4k | { |
120 | | /* U and V have same sign. Add them. */ |
121 | 30.4k | mp_limb_t cy_limb = mpn_add (wp, up, abs_usize, vp, abs_vsize); |
122 | 30.4k | wp[abs_usize] = cy_limb; |
123 | 30.4k | wsize = abs_usize + cy_limb; |
124 | 30.4k | if (usize < 0) |
125 | 0 | wsize = -wsize; |
126 | 30.4k | } |
127 | | |
128 | 39.8k | SIZ(w) = wsize; |
129 | 39.8k | } Line | Count | Source | 51 | 31.7k | { | 52 | 31.7k | mp_srcptr up, vp; | 53 | 31.7k | mp_ptr wp; | 54 | 31.7k | mp_size_t usize, vsize, wsize; | 55 | 31.7k | mp_size_t abs_usize; | 56 | 31.7k | mp_size_t abs_vsize; | 57 | | | 58 | 31.7k | usize = SIZ(u); | 59 | 31.7k | vsize = VARIATION SIZ(v); | 60 | 31.7k | abs_usize = ABS (usize); | 61 | 31.7k | abs_vsize = ABS (vsize); | 62 | | | 63 | 31.7k | if (abs_usize < abs_vsize) | 64 | 1.38k | { | 65 | | /* Swap U and V. */ | 66 | 1.38k | MPZ_SRCPTR_SWAP (u, v); | 67 | 1.38k | MP_SIZE_T_SWAP (usize, vsize); | 68 | 1.38k | MP_SIZE_T_SWAP (abs_usize, abs_vsize); | 69 | 1.38k | } | 70 | | | 71 | | /* True: ABS_USIZE >= ABS_VSIZE. */ | 72 | | | 73 | | /* If not space for w (and possible carry), increase space. */ | 74 | 31.7k | wsize = abs_usize + 1; | 75 | 31.7k | wp = MPZ_REALLOC (w, wsize); | 76 | | | 77 | | /* These must be after realloc (u or v may be the same as w). */ | 78 | 31.7k | up = PTR(u); | 79 | 31.7k | vp = PTR(v); | 80 | | | 81 | 31.7k | if ((usize ^ vsize) < 0) | 82 | 5.37k | { | 83 | | /* U and V have different sign. Need to compare them to determine | 84 | | which operand to subtract from which. */ | 85 | | | 86 | | /* This test is right since ABS_USIZE >= ABS_VSIZE. */ | 87 | 5.37k | if (abs_usize != abs_vsize) | 88 | 455 | { | 89 | 455 | mpn_sub (wp, up, abs_usize, vp, abs_vsize); | 90 | 455 | wsize = abs_usize; | 91 | 455 | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 92 | 455 | if (usize < 0) | 93 | 0 | wsize = -wsize; | 94 | 455 | } | 95 | 4.92k | else | 96 | 4.92k | { | 97 | 4.92k | int cmp = mpn_cmp (up, vp, abs_usize); | 98 | 4.92k | if (cmp < 0) | 99 | 4.92k | { | 100 | 4.92k | mpn_sub_n (wp, vp, up, abs_usize); | 101 | 4.92k | wsize = abs_usize; | 102 | 4.92k | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 103 | 4.92k | if (usize >= 0) | 104 | 0 | wsize = -wsize; | 105 | 4.92k | } | 106 | 0 | else if (cmp > 0) | 107 | 0 | { | 108 | 0 | mpn_sub_n (wp, up, vp, abs_usize); | 109 | 0 | wsize = abs_usize; | 110 | 0 | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 111 | 0 | if (usize < 0) | 112 | 0 | wsize = -wsize; | 113 | 0 | } | 114 | 0 | else | 115 | 0 | wsize = 0; | 116 | 4.92k | } | 117 | 5.37k | } | 118 | 26.3k | else | 119 | 26.3k | { | 120 | | /* U and V have same sign. Add them. */ | 121 | 26.3k | mp_limb_t cy_limb = mpn_add (wp, up, abs_usize, vp, abs_vsize); | 122 | 26.3k | wp[abs_usize] = cy_limb; | 123 | 26.3k | wsize = abs_usize + cy_limb; | 124 | 26.3k | if (usize < 0) | 125 | 0 | wsize = -wsize; | 126 | 26.3k | } | 127 | | | 128 | 31.7k | SIZ(w) = wsize; | 129 | 31.7k | } |
Line | Count | Source | 51 | 8.05k | { | 52 | 8.05k | mp_srcptr up, vp; | 53 | 8.05k | mp_ptr wp; | 54 | 8.05k | mp_size_t usize, vsize, wsize; | 55 | 8.05k | mp_size_t abs_usize; | 56 | 8.05k | mp_size_t abs_vsize; | 57 | | | 58 | 8.05k | usize = SIZ(u); | 59 | 8.05k | vsize = VARIATION SIZ(v); | 60 | 8.05k | abs_usize = ABS (usize); | 61 | 8.05k | abs_vsize = ABS (vsize); | 62 | | | 63 | 8.05k | if (abs_usize < abs_vsize) | 64 | 8.02k | { | 65 | | /* Swap U and V. */ | 66 | 8.02k | MPZ_SRCPTR_SWAP (u, v); | 67 | 8.02k | MP_SIZE_T_SWAP (usize, vsize); | 68 | 8.02k | MP_SIZE_T_SWAP (abs_usize, abs_vsize); | 69 | 8.02k | } | 70 | | | 71 | | /* True: ABS_USIZE >= ABS_VSIZE. */ | 72 | | | 73 | | /* If not space for w (and possible carry), increase space. */ | 74 | 8.05k | wsize = abs_usize + 1; | 75 | 8.05k | wp = MPZ_REALLOC (w, wsize); | 76 | | | 77 | | /* These must be after realloc (u or v may be the same as w). */ | 78 | 8.05k | up = PTR(u); | 79 | 8.05k | vp = PTR(v); | 80 | | | 81 | 8.05k | if ((usize ^ vsize) < 0) | 82 | 4.02k | { | 83 | | /* U and V have different sign. Need to compare them to determine | 84 | | which operand to subtract from which. */ | 85 | | | 86 | | /* This test is right since ABS_USIZE >= ABS_VSIZE. */ | 87 | 4.02k | if (abs_usize != abs_vsize) | 88 | 4.02k | { | 89 | 4.02k | mpn_sub (wp, up, abs_usize, vp, abs_vsize); | 90 | 4.02k | wsize = abs_usize; | 91 | 4.02k | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 92 | 4.02k | if (usize < 0) | 93 | 4.02k | wsize = -wsize; | 94 | 4.02k | } | 95 | 0 | else | 96 | 0 | { | 97 | 0 | int cmp = mpn_cmp (up, vp, abs_usize); | 98 | 0 | if (cmp < 0) | 99 | 0 | { | 100 | 0 | mpn_sub_n (wp, vp, up, abs_usize); | 101 | 0 | wsize = abs_usize; | 102 | 0 | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 103 | 0 | if (usize >= 0) | 104 | 0 | wsize = -wsize; | 105 | 0 | } | 106 | 0 | else if (cmp > 0) | 107 | 0 | { | 108 | 0 | mpn_sub_n (wp, up, vp, abs_usize); | 109 | 0 | wsize = abs_usize; | 110 | 0 | MPN_NORMALIZE_NOT_ZERO (wp, wsize); | 111 | 0 | if (usize < 0) | 112 | 0 | wsize = -wsize; | 113 | 0 | } | 114 | 0 | else | 115 | 0 | wsize = 0; | 116 | 0 | } | 117 | 4.02k | } | 118 | 4.03k | else | 119 | 4.03k | { | 120 | | /* U and V have same sign. Add them. */ | 121 | 4.03k | mp_limb_t cy_limb = mpn_add (wp, up, abs_usize, vp, abs_vsize); | 122 | 4.03k | wp[abs_usize] = cy_limb; | 123 | 4.03k | wsize = abs_usize + cy_limb; | 124 | 4.03k | if (usize < 0) | 125 | 0 | wsize = -wsize; | 126 | 4.03k | } | 127 | | | 128 | 8.05k | SIZ(w) = wsize; | 129 | 8.05k | } |
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