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70d64cea PM |
1 | /* |
2 | * String handling functions for PowerPC. | |
3 | * | |
4 | * Copyright (C) 1996 Paul Mackerras. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | #include <asm/processor.h> | |
12 | #include <asm/errno.h> | |
13 | #include <asm/ppc_asm.h> | |
9445aa1a | 14 | #include <asm/export.h> |
26deb043 | 15 | #include <asm/kasan.h> |
70d64cea | 16 | |
26deb043 | 17 | #ifndef CONFIG_KASAN |
694fc88c NR |
18 | _GLOBAL(__memset16) |
19 | rlwimi r4,r4,16,0,15 | |
20 | /* fall through */ | |
21 | ||
22 | _GLOBAL(__memset32) | |
23 | rldimi r4,r4,32,0 | |
24 | /* fall through */ | |
25 | ||
26 | _GLOBAL(__memset64) | |
27 | neg r0,r3 | |
28 | andi. r0,r0,7 | |
29 | cmplw cr1,r5,r0 | |
30 | b .Lms | |
31 | EXPORT_SYMBOL(__memset16) | |
32 | EXPORT_SYMBOL(__memset32) | |
33 | EXPORT_SYMBOL(__memset64) | |
26deb043 | 34 | #endif |
694fc88c | 35 | |
26deb043 | 36 | _GLOBAL_KASAN(memset) |
70d64cea PM |
37 | neg r0,r3 |
38 | rlwimi r4,r4,8,16,23 | |
39 | andi. r0,r0,7 /* # bytes to be 8-byte aligned */ | |
40 | rlwimi r4,r4,16,0,15 | |
41 | cmplw cr1,r5,r0 /* do we get that far? */ | |
42 | rldimi r4,r4,32,0 | |
694fc88c | 43 | .Lms: PPC_MTOCRF(1,r0) |
70d64cea PM |
44 | mr r6,r3 |
45 | blt cr1,8f | |
be54c121 | 46 | beq 3f /* if already 8-byte aligned */ |
70d64cea PM |
47 | subf r5,r0,r5 |
48 | bf 31,1f | |
49 | stb r4,0(r6) | |
50 | addi r6,r6,1 | |
51 | 1: bf 30,2f | |
52 | sth r4,0(r6) | |
53 | addi r6,r6,2 | |
54 | 2: bf 29,3f | |
55 | stw r4,0(r6) | |
56 | addi r6,r6,4 | |
57 | 3: srdi. r0,r5,6 | |
58 | clrldi r5,r5,58 | |
59 | mtctr r0 | |
60 | beq 5f | |
12ab11a2 | 61 | .balign 16 |
70d64cea PM |
62 | 4: std r4,0(r6) |
63 | std r4,8(r6) | |
64 | std r4,16(r6) | |
65 | std r4,24(r6) | |
66 | std r4,32(r6) | |
67 | std r4,40(r6) | |
68 | std r4,48(r6) | |
69 | std r4,56(r6) | |
70 | addi r6,r6,64 | |
71 | bdnz 4b | |
72 | 5: srwi. r0,r5,3 | |
73 | clrlwi r5,r5,29 | |
694caf02 | 74 | PPC_MTOCRF(1,r0) |
70d64cea PM |
75 | beq 8f |
76 | bf 29,6f | |
77 | std r4,0(r6) | |
78 | std r4,8(r6) | |
79 | std r4,16(r6) | |
80 | std r4,24(r6) | |
81 | addi r6,r6,32 | |
82 | 6: bf 30,7f | |
83 | std r4,0(r6) | |
84 | std r4,8(r6) | |
85 | addi r6,r6,16 | |
86 | 7: bf 31,8f | |
87 | std r4,0(r6) | |
88 | addi r6,r6,8 | |
89 | 8: cmpwi r5,0 | |
694caf02 | 90 | PPC_MTOCRF(1,r5) |
be54c121 | 91 | beqlr |
70d64cea PM |
92 | bf 29,9f |
93 | stw r4,0(r6) | |
94 | addi r6,r6,4 | |
95 | 9: bf 30,10f | |
96 | sth r4,0(r6) | |
97 | addi r6,r6,2 | |
98 | 10: bflr 31 | |
99 | stb r4,0(r6) | |
100 | blr | |
9445aa1a | 101 | EXPORT_SYMBOL(memset) |
26deb043 | 102 | EXPORT_SYMBOL_KASAN(memset) |
70d64cea | 103 | |
26deb043 | 104 | _GLOBAL_TOC_KASAN(memmove) |
70d64cea | 105 | cmplw 0,r3,r4 |
b1576fec AB |
106 | bgt backwards_memcpy |
107 | b memcpy | |
70d64cea PM |
108 | |
109 | _GLOBAL(backwards_memcpy) | |
110 | rlwinm. r7,r5,32-3,3,31 /* r0 = r5 >> 3 */ | |
111 | add r6,r3,r5 | |
112 | add r4,r4,r5 | |
113 | beq 2f | |
114 | andi. r0,r6,3 | |
115 | mtctr r7 | |
116 | bne 5f | |
12ab11a2 | 117 | .balign 16 |
70d64cea PM |
118 | 1: lwz r7,-4(r4) |
119 | lwzu r8,-8(r4) | |
120 | stw r7,-4(r6) | |
121 | stwu r8,-8(r6) | |
122 | bdnz 1b | |
123 | andi. r5,r5,7 | |
124 | 2: cmplwi 0,r5,4 | |
125 | blt 3f | |
126 | lwzu r0,-4(r4) | |
127 | subi r5,r5,4 | |
128 | stwu r0,-4(r6) | |
129 | 3: cmpwi 0,r5,0 | |
130 | beqlr | |
131 | mtctr r5 | |
132 | 4: lbzu r0,-1(r4) | |
133 | stbu r0,-1(r6) | |
134 | bdnz 4b | |
135 | blr | |
136 | 5: mtctr r0 | |
137 | 6: lbzu r7,-1(r4) | |
138 | stbu r7,-1(r6) | |
139 | bdnz 6b | |
140 | subf r5,r0,r5 | |
141 | rlwinm. r7,r5,32-3,3,31 | |
142 | beq 2b | |
143 | mtctr r7 | |
144 | b 1b | |
9445aa1a | 145 | EXPORT_SYMBOL(memmove) |
26deb043 | 146 | EXPORT_SYMBOL_KASAN(memmove) |