1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* MIPS3 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
* store difference in a third limb vector.
*
* Copyright (C) 1995-2018 Free Software Foundation, Inc.
*
* This file is part of the GNU MP Library.
*
* The GNU MP Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The GNU MP Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the GNU MP Library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <sysdep.h>
#include <sys/asm.h>
/* INPUT PARAMETERS
* res_ptr $4
* s1_ptr $5
* s2_ptr $6
* size $7
*/
#ifdef __PIC__
.option pic2
#endif
ENTRY (__mpn_sub_n)
#ifdef __PIC__
SETUP_GP /* ??? unused */
#endif
.set noreorder
.set nomacro
ld $10,0($5)
ld $11,0($6)
daddiu $7,$7,-1
and $9,$7,4-1 # number of limbs in first loop
beq $9,$0,L(L0) # if multiple of 4 limbs, skip first loop
move $2,$0
dsubu $7,$7,$9
L(Loop0): daddiu $9,$9,-1
ld $12,8($5)
daddu $11,$11,$2
ld $13,8($6)
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,0($4)
or $2,$2,$8
daddiu $5,$5,8
daddiu $6,$6,8
move $10,$12
move $11,$13
bne $9,$0,L(Loop0)
daddiu $4,$4,8
L(L0): beq $7,$0,L(Lend)
nop
L(Loop): daddiu $7,$7,-4
ld $12,8($5)
daddu $11,$11,$2
ld $13,8($6)
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,0($4)
or $2,$2,$8
ld $10,16($5)
daddu $13,$13,$2
ld $11,16($6)
sltu $8,$13,$2
dsubu $13,$12,$13
sltu $2,$12,$13
sd $13,8($4)
or $2,$2,$8
ld $12,24($5)
daddu $11,$11,$2
ld $13,24($6)
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,16($4)
or $2,$2,$8
ld $10,32($5)
daddu $13,$13,$2
ld $11,32($6)
sltu $8,$13,$2
dsubu $13,$12,$13
sltu $2,$12,$13
sd $13,24($4)
or $2,$2,$8
daddiu $5,$5,32
daddiu $6,$6,32
bne $7,$0,L(Loop)
daddiu $4,$4,32
L(Lend): daddu $11,$11,$2
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,0($4)
j $31
or $2,$2,$8
END (__mpn_sub_n)
|
