/src/gmp-6.2.1/mpz/aors_ui.h
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1 | | /* mpz_add_ui, mpz_sub_ui -- Add or subtract an mpz_t and an unsigned |
2 | | one-word integer. |
3 | | |
4 | | Copyright 1991, 1993, 1994, 1996, 1999-2002, 2004, 2012, 2013, 2015 |
5 | | Free Software Foundation, Inc. |
6 | | |
7 | | This file is part of the GNU MP Library. |
8 | | |
9 | | The GNU MP Library is free software; you can redistribute it and/or modify |
10 | | it under the terms of either: |
11 | | |
12 | | * the GNU Lesser General Public License as published by the Free |
13 | | Software Foundation; either version 3 of the License, or (at your |
14 | | option) any later version. |
15 | | |
16 | | or |
17 | | |
18 | | * the GNU General Public License as published by the Free Software |
19 | | Foundation; either version 2 of the License, or (at your option) any |
20 | | later version. |
21 | | |
22 | | or both in parallel, as here. |
23 | | |
24 | | The GNU MP Library is distributed in the hope that it will be useful, but |
25 | | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
26 | | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
27 | | for more details. |
28 | | |
29 | | You should have received copies of the GNU General Public License and the |
30 | | GNU Lesser General Public License along with the GNU MP Library. If not, |
31 | | see https://www.gnu.org/licenses/. */ |
32 | | |
33 | | #include "gmp-impl.h" |
34 | | |
35 | | |
36 | | #ifdef OPERATION_add_ui |
37 | | #define FUNCTION mpz_add_ui |
38 | | #define FUNCTION2 mpz_add |
39 | | #define VARIATION_CMP >= |
40 | | #define VARIATION_NEG |
41 | 0 | #define VARIATION_UNNEG - |
42 | | #endif |
43 | | |
44 | | #ifdef OPERATION_sub_ui |
45 | | #define FUNCTION mpz_sub_ui |
46 | | #define FUNCTION2 mpz_sub |
47 | | #define VARIATION_CMP < |
48 | 8 | #define VARIATION_NEG - |
49 | | #define VARIATION_UNNEG |
50 | | #endif |
51 | | |
52 | | #ifndef FUNCTION |
53 | | Error, need OPERATION_add_ui or OPERATION_sub_ui |
54 | | #endif |
55 | | |
56 | | |
57 | | void |
58 | | FUNCTION (mpz_ptr w, mpz_srcptr u, unsigned long int vval) |
59 | 320 | { |
60 | 320 | mp_srcptr up; |
61 | 320 | mp_ptr wp; |
62 | 320 | mp_size_t usize, wsize; |
63 | 320 | mp_size_t abs_usize; |
64 | | |
65 | | #if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */ |
66 | | if (vval > GMP_NUMB_MAX) |
67 | | { |
68 | | mpz_t v; |
69 | | mp_limb_t vl[2]; |
70 | | PTR(v) = vl; |
71 | | vl[0] = vval & GMP_NUMB_MASK; |
72 | | vl[1] = vval >> GMP_NUMB_BITS; |
73 | | SIZ(v) = 2; |
74 | | FUNCTION2 (w, u, v); |
75 | | return; |
76 | | } |
77 | | #endif |
78 | | |
79 | 320 | usize = SIZ (u); |
80 | 320 | if (usize == 0) |
81 | 28 | { |
82 | 28 | MPZ_NEWALLOC (w, 1)[0] = vval; |
83 | 28 | SIZ (w) = VARIATION_NEG (vval != 0); |
84 | 28 | return; |
85 | 28 | } |
86 | | |
87 | 292 | abs_usize = ABS (usize); |
88 | | |
89 | | /* If not space for W (and possible carry), increase space. */ |
90 | 292 | wp = MPZ_REALLOC (w, abs_usize + 1); |
91 | | |
92 | | /* These must be after realloc (U may be the same as W). */ |
93 | 292 | up = PTR (u); |
94 | | |
95 | 292 | if (usize VARIATION_CMP 0) |
96 | 120 | { |
97 | 120 | mp_limb_t cy; |
98 | 120 | cy = mpn_add_1 (wp, up, abs_usize, (mp_limb_t) vval); |
99 | 120 | wp[abs_usize] = cy; |
100 | 120 | wsize = VARIATION_NEG (abs_usize + cy); |
101 | 120 | } |
102 | 172 | else |
103 | 172 | { |
104 | | /* The signs are different. Need exact comparison to determine |
105 | | which operand to subtract from which. */ |
106 | 172 | if (abs_usize == 1 && up[0] < vval) |
107 | 3 | { |
108 | 3 | wp[0] = vval - up[0]; |
109 | 3 | wsize = VARIATION_NEG 1; |
110 | 3 | } |
111 | 169 | else |
112 | 169 | { |
113 | 169 | mpn_sub_1 (wp, up, abs_usize, (mp_limb_t) vval); |
114 | | /* Size can decrease with at most one limb. */ |
115 | 169 | wsize = VARIATION_UNNEG (abs_usize - (wp[abs_usize - 1] == 0)); |
116 | 169 | } |
117 | 172 | } |
118 | | |
119 | 292 | SIZ (w) = wsize; |
120 | 292 | } Line | Count | Source | 59 | 143 | { | 60 | 143 | mp_srcptr up; | 61 | 143 | mp_ptr wp; | 62 | 143 | mp_size_t usize, wsize; | 63 | 143 | mp_size_t abs_usize; | 64 | | | 65 | | #if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */ | 66 | | if (vval > GMP_NUMB_MAX) | 67 | | { | 68 | | mpz_t v; | 69 | | mp_limb_t vl[2]; | 70 | | PTR(v) = vl; | 71 | | vl[0] = vval & GMP_NUMB_MASK; | 72 | | vl[1] = vval >> GMP_NUMB_BITS; | 73 | | SIZ(v) = 2; | 74 | | FUNCTION2 (w, u, v); | 75 | | return; | 76 | | } | 77 | | #endif | 78 | | | 79 | 143 | usize = SIZ (u); | 80 | 143 | if (usize == 0) | 81 | 23 | { | 82 | 23 | MPZ_NEWALLOC (w, 1)[0] = vval; | 83 | 23 | SIZ (w) = VARIATION_NEG (vval != 0); | 84 | 23 | return; | 85 | 23 | } | 86 | | | 87 | 120 | abs_usize = ABS (usize); | 88 | | | 89 | | /* If not space for W (and possible carry), increase space. */ | 90 | 120 | wp = MPZ_REALLOC (w, abs_usize + 1); | 91 | | | 92 | | /* These must be after realloc (U may be the same as W). */ | 93 | 120 | up = PTR (u); | 94 | | | 95 | 120 | if (usize VARIATION_CMP 0) | 96 | 120 | { | 97 | 120 | mp_limb_t cy; | 98 | 120 | cy = mpn_add_1 (wp, up, abs_usize, (mp_limb_t) vval); | 99 | 120 | wp[abs_usize] = cy; | 100 | 120 | wsize = VARIATION_NEG (abs_usize + cy); | 101 | 120 | } | 102 | 0 | else | 103 | 0 | { | 104 | | /* The signs are different. Need exact comparison to determine | 105 | | which operand to subtract from which. */ | 106 | 0 | if (abs_usize == 1 && up[0] < vval) | 107 | 0 | { | 108 | 0 | wp[0] = vval - up[0]; | 109 | 0 | wsize = VARIATION_NEG 1; | 110 | 0 | } | 111 | 0 | else | 112 | 0 | { | 113 | 0 | mpn_sub_1 (wp, up, abs_usize, (mp_limb_t) vval); | 114 | | /* Size can decrease with at most one limb. */ | 115 | 0 | wsize = VARIATION_UNNEG (abs_usize - (wp[abs_usize - 1] == 0)); | 116 | 0 | } | 117 | 0 | } | 118 | | | 119 | 120 | SIZ (w) = wsize; | 120 | 120 | } |
Line | Count | Source | 59 | 177 | { | 60 | 177 | mp_srcptr up; | 61 | 177 | mp_ptr wp; | 62 | 177 | mp_size_t usize, wsize; | 63 | 177 | mp_size_t abs_usize; | 64 | | | 65 | | #if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */ | 66 | | if (vval > GMP_NUMB_MAX) | 67 | | { | 68 | | mpz_t v; | 69 | | mp_limb_t vl[2]; | 70 | | PTR(v) = vl; | 71 | | vl[0] = vval & GMP_NUMB_MASK; | 72 | | vl[1] = vval >> GMP_NUMB_BITS; | 73 | | SIZ(v) = 2; | 74 | | FUNCTION2 (w, u, v); | 75 | | return; | 76 | | } | 77 | | #endif | 78 | | | 79 | 177 | usize = SIZ (u); | 80 | 177 | if (usize == 0) | 81 | 5 | { | 82 | 5 | MPZ_NEWALLOC (w, 1)[0] = vval; | 83 | 5 | SIZ (w) = VARIATION_NEG (vval != 0); | 84 | 5 | return; | 85 | 5 | } | 86 | | | 87 | 172 | abs_usize = ABS (usize); | 88 | | | 89 | | /* If not space for W (and possible carry), increase space. */ | 90 | 172 | wp = MPZ_REALLOC (w, abs_usize + 1); | 91 | | | 92 | | /* These must be after realloc (U may be the same as W). */ | 93 | 172 | up = PTR (u); | 94 | | | 95 | 172 | if (usize VARIATION_CMP 0) | 96 | 0 | { | 97 | 0 | mp_limb_t cy; | 98 | 0 | cy = mpn_add_1 (wp, up, abs_usize, (mp_limb_t) vval); | 99 | 0 | wp[abs_usize] = cy; | 100 | 0 | wsize = VARIATION_NEG (abs_usize + cy); | 101 | 0 | } | 102 | 172 | else | 103 | 172 | { | 104 | | /* The signs are different. Need exact comparison to determine | 105 | | which operand to subtract from which. */ | 106 | 172 | if (abs_usize == 1 && up[0] < vval) | 107 | 3 | { | 108 | 3 | wp[0] = vval - up[0]; | 109 | 3 | wsize = VARIATION_NEG 1; | 110 | 3 | } | 111 | 169 | else | 112 | 169 | { | 113 | 169 | mpn_sub_1 (wp, up, abs_usize, (mp_limb_t) vval); | 114 | | /* Size can decrease with at most one limb. */ | 115 | 169 | wsize = VARIATION_UNNEG (abs_usize - (wp[abs_usize - 1] == 0)); | 116 | 169 | } | 117 | 172 | } | 118 | | | 119 | 172 | SIZ (w) = wsize; | 120 | 172 | } |
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