1 #ifndef _M68K_STRING_H_
2 #define _M68K_STRING_H_
3
4 #include <linux/types.h>
5 #include <linux/compiler.h>
6
__kernel_strlen(const char * s)7 static 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
__kernel_strcpy(char * dest,const char * src)16 static 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
strnlen(const char * s,size_t count)36 static 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
strncpy(char * dest,const char * src,size_t n)62 static 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 #define __HAVE_ARCH_STRCHR
strchr(const char * s,int c)85 static inline char *strchr(const char *s, int c)
86 {
87 char sc, ch = c;
88
89 for (; (sc = *s++) != ch; ) {
90 if (!sc)
91 return NULL;
92 }
93 return (char *)s - 1;
94 }
95
96 #define __HAVE_ARCH_STRCMP
strcmp(const char * cs,const char * ct)97 static inline int strcmp(const char *cs, const char *ct)
98 {
99 char res;
100
101 asm ("\n"
102 "1: move.b (%0)+,%2\n" /* get *cs */
103 " cmp.b (%1)+,%2\n" /* compare a byte */
104 " jne 2f\n" /* not equal, break out */
105 " tst.b %2\n" /* at end of cs? */
106 " jne 1b\n" /* no, keep going */
107 " jra 3f\n" /* strings are equal */
108 "2: sub.b -(%1),%2\n" /* *cs - *ct */
109 "3:"
110 : "+a" (cs), "+a" (ct), "=d" (res));
111 return res;
112 }
113
114 #define __HAVE_ARCH_MEMSET
115 extern void *memset(void *, int, __kernel_size_t);
116 #define memset(d, c, n) __builtin_memset(d, c, n)
117
118 #define __HAVE_ARCH_MEMCPY
119 extern void *memcpy(void *, const void *, __kernel_size_t);
120 #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
121
122 #define __HAVE_ARCH_MEMMOVE
123 extern void *memmove(void *, const void *, __kernel_size_t);
124
125 #define __HAVE_ARCH_MEMCMP
126 extern int memcmp(const void *, const void *, __kernel_size_t);
127 #define memcmp(d, s, n) __builtin_memcmp(d, s, n)
128
129 #endif
130
131 #endif /* _M68K_STRING_H_ */
132