1/*
2 * arch/score/lib/string.S
3 *
4 * Score Processor version.
5 *
6 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
7 *  Chen Liqin <liqin.chen@sunplusct.com>
8 *  Lennox Wu <lennox.wu@sunplusct.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see the file COPYING, or write
22 * to the Free Software Foundation, Inc.,
23 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
24 */
25
26#include <linux/linkage.h>
27#include <asm-generic/errno.h>
28
29	.text
30	.align 2
31ENTRY(__strncpy_from_user)
32	cmpi.c	r6, 0
33	mv	r9, r6
34	ble	.L2
350:	lbu	r7, [r5]
36	ldi	r8, 0
371:	sb	r7, [r4]
382:	lb	r6, [r5]
39	cmp.c	r6, r8
40	beq	.L2
41
42.L5:
43	addi	r8, 1
44	cmp.c	r8, r9
45	beq	.L7
463:	lbu	r6, [r5, 1]+
474:	sb	r6, [r4, 1]+
485:	lb	r7, [r5]
49	cmpi.c	r7, 0
50	bne	.L5
51.L7:
52	mv	r4, r8
53	br	r3
54.L2:
55	ldi	r8, 0
56	mv	r4, r8
57	br	r3
58	.section .fixup, "ax"
5999:
60	ldi	r4, -EFAULT
61	br	r3
62	.previous
63	.section __ex_table, "a"
64	.align	2
65	.word	0b ,99b
66	.word	1b ,99b
67	.word	2b ,99b
68	.word	3b ,99b
69	.word	4b ,99b
70	.word	5b ,99b
71	.previous
72
73	.align 2
74ENTRY(__strnlen_user)
75	cmpi.c	r5, 0
76	ble	.L11
770:	lb	r6, [r4]
78	ldi	r7, 0
79	cmp.c	r6, r7
80	beq	.L11
81.L15:
82	addi	r7, 1
83	cmp.c	r7, r5
84	beq	.L23
851:	lb	r6, [r4,1]+
86	cmpi.c	r6, 0
87	bne	.L15
88.L23:
89	addri	r4, r7, 1
90	br	r3
91
92.L11:
93	ldi	r4, 1
94	br	r3
95	.section .fixup, "ax"
9699:
97	ldi	r4, 0
98	br	r3
99
100	.section __ex_table,"a"
101	.align 2
102	.word	0b, 99b
103	.word	1b, 99b
104	.previous
105
106	.align 2
107ENTRY(__strlen_user)
1080:	lb	r6, [r4]
109	mv	r7, r4
110	extsb	r6, r6
111	cmpi.c	r6, 0
112	mv	r4, r6
113	beq	.L27
114.L28:
1151:	lb	r6, [r7, 1]+
116	addi	r6, 1
117	cmpi.c	r6, 0
118	bne	.L28
119.L27:
120	br	r3
121	.section .fixup, "ax"
122	ldi	r4, 0x0
123	br	r3
12499:
125	ldi	r4, 0
126	br	r3
127	.previous
128	.section __ex_table, "a"
129	.align	2
130	.word	0b ,99b
131	.word	1b ,99b
132	.previous
133
134	.align 2
135ENTRY(__copy_tofrom_user)
136	cmpi.c	r6, 0
137	mv	r10,r6
138	beq	.L32
139	ldi	r9, 0
140.L34:
141	add	r6, r5, r9
1420:	lbu	r8, [r6]
143	add	r7, r4, r9
1441:	sb	r8, [r7]
145	addi	r9, 1
146	cmp.c	r9, r10
147	bne	.L34
148.L32:
149	ldi	r4, 0
150	br	r3
151	.section .fixup, "ax"
15299:
153	sub	r4, r10, r9
154	br	r3
155	.previous
156	.section __ex_table, "a"
157	.align	2
158	.word	0b, 99b
159	.word	1b, 99b
160	.previous
161
162	.align 2
163ENTRY(__clear_user)
164	cmpi.c	r5, 0
165	beq	.L38
166	ldi	r6, 0
167	mv	r7, r6
168.L40:
169	addi	r6, 1
1700:	sb	r7, [r4]+, 1
171	cmp.c	r6, r5
172	bne	.L40
173.L38:
174	ldi	r4, 0
175	br	r3
176
177	.section .fixup, "ax"
178	br	r3
179	.previous
180	.section __ex_table, "a"
181	.align	2
18299:
183	.word	0b, 99b
184	.previous
185