Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _M68K_STRING_H_
2#define _M68K_STRING_H_
3
4#include <linux/types.h>
5#include <linux/compiler.h>
6
7static inline size_t __kernel_strlen(const char *s)
8{
9 const char *sc;
10
11 for (sc = s; *sc++; )
12 ;
13 return sc - s - 1;
14}
15
16static inline char *__kernel_strcpy(char *dest, const char *src)
17{
18 char *xdest = dest;
19
20 asm volatile ("\n"
21 "1: move.b (%1)+,(%0)+\n"
22 " jne 1b"
23 : "+a" (dest), "+a" (src)
24 : : "memory");
25 return xdest;
26}
27
28#ifndef __IN_STRING_C
29
30#define __HAVE_ARCH_STRLEN
31#define strlen(s) (__builtin_constant_p(s) ? \
32 __builtin_strlen(s) : \
33 __kernel_strlen(s))
34
35#define __HAVE_ARCH_STRNLEN
36static inline size_t strnlen(const char *s, size_t count)
37{
38 const char *sc = s;
39
40 asm volatile ("\n"
41 "1: subq.l #1,%1\n"
42 " jcs 2f\n"
43 " tst.b (%0)+\n"
44 " jne 1b\n"
45 " subq.l #1,%0\n"
46 "2:"
47 : "+a" (sc), "+d" (count));
48 return sc - s;
49}
50
51#define __HAVE_ARCH_STRCPY
52#if __GNUC__ >= 4
53#define strcpy(d, s) (__builtin_constant_p(s) && \
54 __builtin_strlen(s) <= 32 ? \
55 __builtin_strcpy(d, s) : \
56 __kernel_strcpy(d, s))
57#else
58#define strcpy(d, s) __kernel_strcpy(d, s)
59#endif
60
61#define __HAVE_ARCH_STRNCPY
62static inline char *strncpy(char *dest, const char *src, size_t n)
63{
64 char *xdest = dest;
65
66 asm volatile ("\n"
67 " jra 2f\n"
68 "1: move.b (%1),(%0)+\n"
69 " jeq 2f\n"
70 " addq.l #1,%1\n"
71 "2: subq.l #1,%2\n"
72 " jcc 1b\n"
73 : "+a" (dest), "+a" (src), "+d" (n)
74 : : "memory");
75 return xdest;
76}
77
78#define __HAVE_ARCH_STRCAT
79#define strcat(d, s) ({ \
80 char *__d = (d); \
81 strcpy(__d + strlen(__d), (s)); \
82})
83
84#ifndef CONFIG_COLDFIRE
85#define __HAVE_ARCH_STRCMP
86static inline int strcmp(const char *cs, const char *ct)
87{
88 char res;
89
90 asm ("\n"
91 "1: move.b (%0)+,%2\n" /* get *cs */
92 " cmp.b (%1)+,%2\n" /* compare a byte */
93 " jne 2f\n" /* not equal, break out */
94 " tst.b %2\n" /* at end of cs? */
95 " jne 1b\n" /* no, keep going */
96 " jra 3f\n" /* strings are equal */
97 "2: sub.b -(%1),%2\n" /* *cs - *ct */
98 "3:"
99 : "+a" (cs), "+a" (ct), "=d" (res));
100 return res;
101}
102#endif /* CONFIG_COLDFIRE */
103
104#define __HAVE_ARCH_MEMMOVE
105extern void *memmove(void *, const void *, __kernel_size_t);
106
107#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
108
109#define __HAVE_ARCH_MEMSET
110extern void *memset(void *, int, __kernel_size_t);
111#define memset(d, c, n) __builtin_memset(d, c, n)
112
113#define __HAVE_ARCH_MEMCPY
114extern void *memcpy(void *, const void *, __kernel_size_t);
115#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
116
117#endif
118
119#endif /* _M68K_STRING_H_ */