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#define __HAVE_ARCH_STRCHR
85static 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
97static 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
115extern void *memset(void *, int, __kernel_size_t);
116#define memset(d, c, n) __builtin_memset(d, c, n)
117
118#define __HAVE_ARCH_MEMCPY
119extern 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
123extern void *memmove(void *, const void *, __kernel_size_t);
124
125#define __HAVE_ARCH_MEMCMP
126extern 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