1/* MIPS2 __mpn_add_n -- Add two limb vectors of the same length > 0 and
2store sum in a third limb vector.
3
4Copyright (C) 1995-2021 Free Software Foundation, Inc.
5
6This file is part of the GNU MP Library.
7
8The GNU MP Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 2.1 of the License, or (at your
11option) any later version.
12
13The GNU MP Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MP Library.  If not, see
20<https://www.gnu.org/licenses/>.  */
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*/
30#ifdef __PIC__
31	.option pic2
32#endif
33ENTRY (__mpn_add_n)
34	.set	noreorder
35#ifdef __PIC__
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 */
45	beq	$9,$0,L(L0)	/* if multiple of 4 limbs, skip first loop */
46	move	$2,$0
47
48	subu	$7,$7,$9
49
50L(Loop0):	addiu	$9,$9,-1
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
64	bne	$9,$0,L(Loop0)
65	addiu	$4,$4,4
66
67L(L0):	beq	$7,$0,L(end)
68	nop
69
70L(Loop):	addiu	$7,$7,-4
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
111	bne	$7,$0,L(Loop)
112	addiu	$4,$4,16
113
114L(end):	addu	$11,$11,$2
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
121END (__mpn_add_n)
122