1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_STRING_H
3 #define __ASM_SH_STRING_H
4 
5 /*
6  * Copyright (C) 1999 Niibe Yutaka
7  * But consider these trivial functions to be public domain.
8  */
9 
10 #define __HAVE_ARCH_STRCPY
strcpy(char * __dest,const char * __src)11 static inline char *strcpy(char *__dest, const char *__src)
12 {
13 	register char *__xdest = __dest;
14 	unsigned long __dummy;
15 
16 	__asm__ __volatile__("1:\n\t"
17 			     "mov.b	@%1+, %2\n\t"
18 			     "mov.b	%2, @%0\n\t"
19 			     "cmp/eq	#0, %2\n\t"
20 			     "bf/s	1b\n\t"
21 			     " add	#1, %0\n\t"
22 			     : "=r" (__dest), "=r" (__src), "=&z" (__dummy)
23 			     : "0" (__dest), "1" (__src)
24 			     : "memory", "t");
25 
26 	return __xdest;
27 }
28 
29 #define __HAVE_ARCH_STRCMP
strcmp(const char * __cs,const char * __ct)30 static inline int strcmp(const char *__cs, const char *__ct)
31 {
32 	register int __res;
33 	unsigned long __dummy;
34 
35 	__asm__ __volatile__(
36 		"mov.b	@%1+, %3\n"
37 		"1:\n\t"
38 		"mov.b	@%0+, %2\n\t"
39 		"cmp/eq #0, %3\n\t"
40 		"bt	2f\n\t"
41 		"cmp/eq %2, %3\n\t"
42 		"bt/s	1b\n\t"
43 		" mov.b	@%1+, %3\n\t"
44 		"add	#-2, %1\n\t"
45 		"mov.b	@%1, %3\n\t"
46 		"sub	%3, %2\n"
47 		"2:"
48 		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
49 		: "0" (__cs), "1" (__ct)
50 		: "t");
51 
52 	return __res;
53 }
54 
55 #define __HAVE_ARCH_STRNCMP
strncmp(const char * __cs,const char * __ct,size_t __n)56 static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
57 {
58 	register int __res;
59 	unsigned long __dummy;
60 
61 	if (__n == 0)
62 		return 0;
63 
64 	__asm__ __volatile__(
65 		"mov.b	@%1+, %3\n"
66 		"1:\n\t"
67 		"mov.b	@%0+, %2\n\t"
68 		"cmp/eq %6, %0\n\t"
69 		"bt/s	2f\n\t"
70 		" cmp/eq #0, %3\n\t"
71 		"bt/s	3f\n\t"
72 		" cmp/eq %3, %2\n\t"
73 		"bt/s	1b\n\t"
74 		" mov.b	@%1+, %3\n\t"
75 		"add	#-2, %1\n\t"
76 		"mov.b	@%1, %3\n"
77 		"2:\n\t"
78 		"sub	%3, %2\n"
79 		"3:"
80 		:"=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
81 		: "0" (__cs), "1" (__ct), "r" (__cs+__n)
82 		: "t");
83 
84 	return __res;
85 }
86 
87 #define __HAVE_ARCH_MEMSET
88 extern void *memset(void *__s, int __c, size_t __count);
89 
90 #define __HAVE_ARCH_MEMCPY
91 extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
92 
93 #define __HAVE_ARCH_MEMMOVE
94 extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
95 
96 #define __HAVE_ARCH_MEMCHR
97 extern void *memchr(const void *__s, int __c, size_t __n);
98 
99 #define __HAVE_ARCH_STRLEN
100 extern size_t strlen(const char *);
101 
102 #endif /* __ASM_SH_STRING_H */
103