1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _M68K_STRING_H_
3 #define _M68K_STRING_H_
4
5 #include <linux/types.h>
6 #include <linux/compiler.h>
7
8 #define __HAVE_ARCH_STRNLEN
9 static inline size_t strnlen(const char *s, size_t count)
10 {
11 const char *sc = s;
12
13 asm volatile ("\n"
14 "1: subq.l #1,%1\n"
15 " jcs 2f\n"
16 " tst.b (%0)+\n"
17 " jne 1b\n"
18 " subq.l #1,%0\n"
19 "2:"
20 : "+a" (sc), "+d" (count));
21 return sc - s;
22 }
23
24 #define __HAVE_ARCH_STRNCPY
25 static inline char *strncpy(char *dest, const char *src, size_t n)
26 {
27 char *xdest = dest;
28
29 asm volatile ("\n"
30 " jra 2f\n"
31 "1: move.b (%1),(%0)+\n"
32 " jeq 2f\n"
33 " addq.l #1,%1\n"
34 "2: subq.l #1,%2\n"
35 " jcc 1b\n"
36 : "+a" (dest), "+a" (src), "+d" (n)
37 : : "memory");
38 return xdest;
39 }
40
41 #define __HAVE_ARCH_MEMMOVE
42 extern void *memmove(void *, const void *, __kernel_size_t);
43
44 extern int memcmp(const void *, const void *, __kernel_size_t);
45 #define memcmp(d, s, n) __builtin_memcmp(d, s, n)
46
47 #define __HAVE_ARCH_MEMSET
48 extern void *memset(void *, int, __kernel_size_t);
49 #define memset(d, c, n) __builtin_memset(d, c, n)
50
51 #define __HAVE_ARCH_MEMCPY
52 extern void *memcpy(void *, const void *, __kernel_size_t);
53 #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
54
55 #endif /* _M68K_STRING_H_ */
56
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