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1 | /* MIPS2 __mpn_add_n -- Add two limb vectors of the same length > 0 and |
2 | store sum in a third limb vector. | |
3 | ||
bfff8b1b | 4 | Copyright (C) 1995-2017 Free Software Foundation, Inc. |
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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 | |
f01ec467 AJ |
9 | it under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or (at your | |
bcb5cee0 UD |
11 | option) any later version. |
12 | ||
13 | The GNU MP Library is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
f01ec467 | 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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16 | License for more details. |
17 | ||
f01ec467 | 18 | You should have received a copy of the GNU Lesser General Public License |
ab84e3ff PE |
19 | along with the GNU MP Library. If not, see |
20 | <http://www.gnu.org/licenses/>. */ | |
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21 | |
22 | #include <sysdep.h> | |
23 | ||
24 | /* INPUT PARAMETERS | |
25 | res_ptr $4 | |
26 | s1_ptr $5 | |
27 | s2_ptr $6 | |
28 | size $7 | |
29 | */ | |
127035bb | 30 | #ifdef __PIC__ |
bcb5cee0 UD |
31 | .option pic2 |
32 | #endif | |
33 | ENTRY (__mpn_add_n) | |
34 | .set noreorder | |
127035bb | 35 | #ifdef __PIC__ |
bcb5cee0 UD |
36 | .cpload t9 |
37 | #endif | |
38 | .set nomacro | |
39 | ||
40 | lw $10,0($5) | |
41 | lw $11,0($6) | |
42 | ||
43 | addiu $7,$7,-1 | |
44 | and $9,$7,4-1 /* number of limbs in first loop */ | |
3e9a9758 | 45 | beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop */ |
bcb5cee0 UD |
46 | move $2,$0 |
47 | ||
48 | subu $7,$7,$9 | |
49 | ||
3e9a9758 | 50 | L(Loop0): addiu $9,$9,-1 |
bcb5cee0 UD |
51 | lw $12,4($5) |
52 | addu $11,$11,$2 | |
53 | lw $13,4($6) | |
54 | sltu $8,$11,$2 | |
55 | addu $11,$10,$11 | |
56 | sltu $2,$11,$10 | |
57 | sw $11,0($4) | |
58 | or $2,$2,$8 | |
59 | ||
60 | addiu $5,$5,4 | |
61 | addiu $6,$6,4 | |
62 | move $10,$12 | |
63 | move $11,$13 | |
3e9a9758 RM |
64 | bne $9,$0,L(Loop0) |
65 | addiu $4,$4,4 | |
bcb5cee0 | 66 | |
3e9a9758 RM |
67 | L(L0): beq $7,$0,L(end) |
68 | nop | |
bcb5cee0 | 69 | |
3e9a9758 | 70 | L(Loop): addiu $7,$7,-4 |
bcb5cee0 UD |
71 | |
72 | lw $12,4($5) | |
73 | addu $11,$11,$2 | |
74 | lw $13,4($6) | |
75 | sltu $8,$11,$2 | |
76 | addu $11,$10,$11 | |
77 | sltu $2,$11,$10 | |
78 | sw $11,0($4) | |
79 | or $2,$2,$8 | |
80 | ||
81 | lw $10,8($5) | |
82 | addu $13,$13,$2 | |
83 | lw $11,8($6) | |
84 | sltu $8,$13,$2 | |
85 | addu $13,$12,$13 | |
86 | sltu $2,$13,$12 | |
87 | sw $13,4($4) | |
88 | or $2,$2,$8 | |
89 | ||
90 | lw $12,12($5) | |
91 | addu $11,$11,$2 | |
92 | lw $13,12($6) | |
93 | sltu $8,$11,$2 | |
94 | addu $11,$10,$11 | |
95 | sltu $2,$11,$10 | |
96 | sw $11,8($4) | |
97 | or $2,$2,$8 | |
98 | ||
99 | lw $10,16($5) | |
100 | addu $13,$13,$2 | |
101 | lw $11,16($6) | |
102 | sltu $8,$13,$2 | |
103 | addu $13,$12,$13 | |
104 | sltu $2,$13,$12 | |
105 | sw $13,12($4) | |
106 | or $2,$2,$8 | |
107 | ||
108 | addiu $5,$5,16 | |
109 | addiu $6,$6,16 | |
110 | ||
3e9a9758 RM |
111 | bne $7,$0,L(Loop) |
112 | addiu $4,$4,16 | |
bcb5cee0 | 113 | |
3e9a9758 | 114 | L(end): addu $11,$11,$2 |
bcb5cee0 UD |
115 | sltu $8,$11,$2 |
116 | addu $11,$10,$11 | |
117 | sltu $2,$11,$10 | |
118 | sw $11,0($4) | |
119 | j $31 | |
120 | or $2,$2,$8 | |
a6ee1783 | 121 | END (__mpn_add_n) |