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1/* linux/arch/sparc/lib/memset.S: Sparc optimized memset, bzero and clear_user code
2 * Copyright (C) 1991,1996 Free Software Foundation
3 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 *
6 * Returns 0, if ok, and number of bytes not yet set if exception
7 * occurs and we were called as clear_user.
8 */
9
10#include <asm/ptrace.h>
11
12/* Work around cpp -rob */
13#define ALLOC #alloc
14#define EXECINSTR #execinstr
15#define EX(x,y,a,b) \
1698: x,y; \
17 .section .fixup,ALLOC,EXECINSTR; \
18 .align 4; \
1999: ba 30f; \
20 a, b, %o0; \
21 .section __ex_table,ALLOC; \
22 .align 4; \
23 .word 98b, 99b; \
24 .text; \
25 .align 4
26
27#define EXT(start,end,handler) \
28 .section __ex_table,ALLOC; \
29 .align 4; \
30 .word start, 0, end, handler; \
31 .text; \
32 .align 4
33
34/* Please don't change these macros, unless you change the logic
35 * in the .fixup section below as well.
36 * Store 64 bytes at (BASE + OFFSET) using value SOURCE. */
37#define ZERO_BIG_BLOCK(base, offset, source) \
38 std source, [base + offset + 0x00]; \
39 std source, [base + offset + 0x08]; \
40 std source, [base + offset + 0x10]; \
41 std source, [base + offset + 0x18]; \
42 std source, [base + offset + 0x20]; \
43 std source, [base + offset + 0x28]; \
44 std source, [base + offset + 0x30]; \
45 std source, [base + offset + 0x38];
46
47#define ZERO_LAST_BLOCKS(base, offset, source) \
48 std source, [base - offset - 0x38]; \
49 std source, [base - offset - 0x30]; \
50 std source, [base - offset - 0x28]; \
51 std source, [base - offset - 0x20]; \
52 std source, [base - offset - 0x18]; \
53 std source, [base - offset - 0x10]; \
54 std source, [base - offset - 0x08]; \
55 std source, [base - offset - 0x00];
56
57 .text
58 .align 4
59
60 .globl __bzero_begin
61__bzero_begin:
62
63 .globl __bzero
64 .globl memset
65 .globl __memset_start, __memset_end
66__memset_start:
67memset:
68 and %o1, 0xff, %g3
69 sll %g3, 8, %g2
70 or %g3, %g2, %g3
71 sll %g3, 16, %g2
72 or %g3, %g2, %g3
73 b 1f
74 mov %o2, %o1
753:
76 cmp %o2, 3
77 be 2f
78 EX(stb %g3, [%o0], sub %o1, 0)
79
80 cmp %o2, 2
81 be 2f
82 EX(stb %g3, [%o0 + 0x01], sub %o1, 1)
83
84 EX(stb %g3, [%o0 + 0x02], sub %o1, 2)
852:
86 sub %o2, 4, %o2
87 add %o1, %o2, %o1
88 b 4f
89 sub %o0, %o2, %o0
90
91__bzero:
92 mov %g0, %g3
931:
94 cmp %o1, 7
95 bleu 7f
96 andcc %o0, 3, %o2
97
98 bne 3b
994:
100 andcc %o0, 4, %g0
101
102 be 2f
103 mov %g3, %g2
104
105 EX(st %g3, [%o0], sub %o1, 0)
106 sub %o1, 4, %o1
107 add %o0, 4, %o0
1082:
109 andcc %o1, 0xffffff80, %o3 ! Now everything is 8 aligned and o1 is len to run
110 be 9f
111 andcc %o1, 0x78, %o2
11210:
113 ZERO_BIG_BLOCK(%o0, 0x00, %g2)
114 subcc %o3, 128, %o3
115 ZERO_BIG_BLOCK(%o0, 0x40, %g2)
11611:
117 EXT(10b, 11b, 20f)
118 bne 10b
119 add %o0, 128, %o0
120
121 orcc %o2, %g0, %g0
1229:
123 be 13f
124 andcc %o1, 7, %o1
125
126 srl %o2, 1, %o3
127 set 13f, %o4
128 sub %o4, %o3, %o4
129 jmp %o4
130 add %o0, %o2, %o0
131
13212:
133 ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
134 ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
13513:
136 be 8f
137 andcc %o1, 4, %g0
138
139 be 1f
140 andcc %o1, 2, %g0
141
142 EX(st %g3, [%o0], and %o1, 7)
143 add %o0, 4, %o0
1441:
145 be 1f
146 andcc %o1, 1, %g0
147
148 EX(sth %g3, [%o0], and %o1, 3)
149 add %o0, 2, %o0
1501:
151 bne,a 8f
152 EX(stb %g3, [%o0], and %o1, 1)
1538:
154 retl
155 clr %o0
1567:
157 be 13b
158 orcc %o1, 0, %g0
159
160 be 0f
1618:
162 add %o0, 1, %o0
163 subcc %o1, 1, %o1
164 bne 8b
165 EX(stb %g3, [%o0 - 1], add %o1, 1)
1660:
167 retl
168 clr %o0
169__memset_end:
170
171 .section .fixup,#alloc,#execinstr
172 .align 4
17320:
174 cmp %g2, 8
175 bleu 1f
176 and %o1, 0x7f, %o1
177 sub %g2, 9, %g2
178 add %o3, 64, %o3
1791:
180 sll %g2, 3, %g2
181 add %o3, %o1, %o0
182 b 30f
183 sub %o0, %g2, %o0
18421:
185 mov 8, %o0
186 and %o1, 7, %o1
187 sub %o0, %g2, %o0
188 sll %o0, 3, %o0
189 b 30f
190 add %o0, %o1, %o0
19130:
192/* %o4 is faulting address, %o5 is %pc where fault occurred */
193 save %sp, -104, %sp
194 mov %i5, %o0
195 mov %i7, %o1
196 call lookup_fault
197 mov %i4, %o2
198 ret
199 restore
200
201 .globl __bzero_end
202__bzero_end:
1/* linux/arch/sparc/lib/memset.S: Sparc optimized memset, bzero and clear_user code
2 * Copyright (C) 1991,1996 Free Software Foundation
3 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 *
6 * Calls to memset returns initial %o0. Calls to bzero returns 0, if ok, and
7 * number of bytes not yet set if exception occurs and we were called as
8 * clear_user.
9 */
10
11#include <asm/ptrace.h>
12
13/* Work around cpp -rob */
14#define ALLOC #alloc
15#define EXECINSTR #execinstr
16#define EX(x,y,a,b) \
1798: x,y; \
18 .section .fixup,ALLOC,EXECINSTR; \
19 .align 4; \
2099: ba 30f; \
21 a, b, %o0; \
22 .section __ex_table,ALLOC; \
23 .align 4; \
24 .word 98b, 99b; \
25 .text; \
26 .align 4
27
28#define EXT(start,end,handler) \
29 .section __ex_table,ALLOC; \
30 .align 4; \
31 .word start, 0, end, handler; \
32 .text; \
33 .align 4
34
35/* Please don't change these macros, unless you change the logic
36 * in the .fixup section below as well.
37 * Store 64 bytes at (BASE + OFFSET) using value SOURCE. */
38#define ZERO_BIG_BLOCK(base, offset, source) \
39 std source, [base + offset + 0x00]; \
40 std source, [base + offset + 0x08]; \
41 std source, [base + offset + 0x10]; \
42 std source, [base + offset + 0x18]; \
43 std source, [base + offset + 0x20]; \
44 std source, [base + offset + 0x28]; \
45 std source, [base + offset + 0x30]; \
46 std source, [base + offset + 0x38];
47
48#define ZERO_LAST_BLOCKS(base, offset, source) \
49 std source, [base - offset - 0x38]; \
50 std source, [base - offset - 0x30]; \
51 std source, [base - offset - 0x28]; \
52 std source, [base - offset - 0x20]; \
53 std source, [base - offset - 0x18]; \
54 std source, [base - offset - 0x10]; \
55 std source, [base - offset - 0x08]; \
56 std source, [base - offset - 0x00];
57
58 .text
59 .align 4
60
61 .globl __bzero_begin
62__bzero_begin:
63
64 .globl __bzero
65 .globl memset
66 .globl __memset_start, __memset_end
67__memset_start:
68memset:
69 mov %o0, %g1
70 mov 1, %g4
71 and %o1, 0xff, %g3
72 sll %g3, 8, %g2
73 or %g3, %g2, %g3
74 sll %g3, 16, %g2
75 or %g3, %g2, %g3
76 b 1f
77 mov %o2, %o1
783:
79 cmp %o2, 3
80 be 2f
81 EX(stb %g3, [%o0], sub %o1, 0)
82
83 cmp %o2, 2
84 be 2f
85 EX(stb %g3, [%o0 + 0x01], sub %o1, 1)
86
87 EX(stb %g3, [%o0 + 0x02], sub %o1, 2)
882:
89 sub %o2, 4, %o2
90 add %o1, %o2, %o1
91 b 4f
92 sub %o0, %o2, %o0
93
94__bzero:
95 clr %g4
96 mov %g0, %g3
971:
98 cmp %o1, 7
99 bleu 7f
100 andcc %o0, 3, %o2
101
102 bne 3b
1034:
104 andcc %o0, 4, %g0
105
106 be 2f
107 mov %g3, %g2
108
109 EX(st %g3, [%o0], sub %o1, 0)
110 sub %o1, 4, %o1
111 add %o0, 4, %o0
1122:
113 andcc %o1, 0xffffff80, %o3 ! Now everything is 8 aligned and o1 is len to run
114 be 9f
115 andcc %o1, 0x78, %o2
11610:
117 ZERO_BIG_BLOCK(%o0, 0x00, %g2)
118 subcc %o3, 128, %o3
119 ZERO_BIG_BLOCK(%o0, 0x40, %g2)
12011:
121 EXT(10b, 11b, 20f)
122 bne 10b
123 add %o0, 128, %o0
124
125 orcc %o2, %g0, %g0
1269:
127 be 13f
128 andcc %o1, 7, %o1
129
130 srl %o2, 1, %o3
131 set 13f, %o4
132 sub %o4, %o3, %o4
133 jmp %o4
134 add %o0, %o2, %o0
135
13612:
137 ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
138 ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
13913:
140 be 8f
141 andcc %o1, 4, %g0
142
143 be 1f
144 andcc %o1, 2, %g0
145
146 EX(st %g3, [%o0], and %o1, 7)
147 add %o0, 4, %o0
1481:
149 be 1f
150 andcc %o1, 1, %g0
151
152 EX(sth %g3, [%o0], and %o1, 3)
153 add %o0, 2, %o0
1541:
155 bne,a 8f
156 EX(stb %g3, [%o0], and %o1, 1)
1578:
158 b 0f
159 nop
1607:
161 be 13b
162 orcc %o1, 0, %g0
163
164 be 0f
1658:
166 add %o0, 1, %o0
167 subcc %o1, 1, %o1
168 bne 8b
169 EX(stb %g3, [%o0 - 1], add %o1, 1)
1700:
171 andcc %g4, 1, %g0
172 be 5f
173 nop
174 retl
175 mov %g1, %o0
1765:
177 retl
178 clr %o0
179__memset_end:
180
181 .section .fixup,#alloc,#execinstr
182 .align 4
18320:
184 cmp %g2, 8
185 bleu 1f
186 and %o1, 0x7f, %o1
187 sub %g2, 9, %g2
188 add %o3, 64, %o3
1891:
190 sll %g2, 3, %g2
191 add %o3, %o1, %o0
192 b 30f
193 sub %o0, %g2, %o0
19421:
195 mov 8, %o0
196 and %o1, 7, %o1
197 sub %o0, %g2, %o0
198 sll %o0, 3, %o0
199 b 30f
200 add %o0, %o1, %o0
20130:
202/* %o4 is faulting address, %o5 is %pc where fault occurred */
203 save %sp, -104, %sp
204 mov %i5, %o0
205 mov %i7, %o1
206 call lookup_fault
207 mov %i4, %o2
208 ret
209 restore
210
211 .globl __bzero_end
212__bzero_end: