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
126
127
128
129
130
131
|
/* MIPS3 __mpn_addmul_1 -- Multiply a limb vector with a single limb and
* add the product to a second limb vector.
*
* Copyright (C) 1992-2015 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
* size $6
* s2_limb $7
*/
#ifdef PIC
.option pic2
#endif
ENTRY (__mpn_addmul_1)
#ifdef PIC
SETUP_GP /* ??? unused */
#endif
.set noreorder
.set nomacro
# warm up phase 0
ld $8,0($5)
# warm up phase 1
daddiu $5,$5,8
#if __mips_isa_rev < 6
dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
daddiu $6,$6,-1
beq $6,$0,L(LC0)
move $2,$0 # zero cy2
daddiu $6,$6,-1
beq $6,$0,L(LC1)
ld $8,0($5) # load new s1 limb as early as possible
L(Loop): ld $10,0($4)
#if __mips_isa_rev < 6
mflo $3
mfhi $9
#else
move $3,$11
move $9,$12
#endif
daddiu $5,$5,8
daddu $3,$3,$2 # add old carry limb to low product limb
#if __mips_isa_rev < 6
dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
ld $8,0($5) # load new s1 limb as early as possible
daddiu $6,$6,-1 # decrement loop counter
sltu $2,$3,$2 # carry from previous addition -> $2
daddu $3,$10,$3
sltu $10,$3,$10
daddu $2,$2,$10
sd $3,0($4)
daddiu $4,$4,8
bne $6,$0,L(Loop)
daddu $2,$9,$2 # add high product limb and carry from addition
# cool down phase 1
L(LC1): ld $10,0($4)
#if __mips_isa_rev < 6
mflo $3
mfhi $9
#else
move $3,$11
move $9,$12
#endif
daddu $3,$3,$2
sltu $2,$3,$2
#if __mips_isa_rev < 6
dmultu $8,$7
#else
dmulu $11,$8,$7
dmuhu $12,$8,$7
#endif
daddu $3,$10,$3
sltu $10,$3,$10
daddu $2,$2,$10
sd $3,0($4)
daddiu $4,$4,8
daddu $2,$9,$2 # add high product limb and carry from addition
# cool down phase 0
L(LC0): ld $10,0($4)
#if __mips_isa_rev < 6
mflo $3
mfhi $9
#else
move $3,$11
move $9,$12
#endif
daddu $3,$3,$2
sltu $2,$3,$2
daddu $3,$10,$3
sltu $10,$3,$10
daddu $2,$2,$10
sd $3,0($4)
j $31
daddu $2,$9,$2 # add high product limb and carry from addition
END (__mpn_addmul_1)
|
