1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _M68K_STRING_H_
3*4882a593Smuzhiyun #define _M68K_STRING_H_
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/types.h>
6*4882a593Smuzhiyun #include <linux/compiler.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #define __HAVE_ARCH_STRNLEN
strnlen(const char * s,size_t count)9*4882a593Smuzhiyun static inline size_t strnlen(const char *s, size_t count)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun const char *sc = s;
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun asm volatile ("\n"
14*4882a593Smuzhiyun "1: subq.l #1,%1\n"
15*4882a593Smuzhiyun " jcs 2f\n"
16*4882a593Smuzhiyun " tst.b (%0)+\n"
17*4882a593Smuzhiyun " jne 1b\n"
18*4882a593Smuzhiyun " subq.l #1,%0\n"
19*4882a593Smuzhiyun "2:"
20*4882a593Smuzhiyun : "+a" (sc), "+d" (count));
21*4882a593Smuzhiyun return sc - s;
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define __HAVE_ARCH_STRNCPY
strncpy(char * dest,const char * src,size_t n)25*4882a593Smuzhiyun static inline char *strncpy(char *dest, const char *src, size_t n)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun char *xdest = dest;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun asm volatile ("\n"
30*4882a593Smuzhiyun " jra 2f\n"
31*4882a593Smuzhiyun "1: move.b (%1),(%0)+\n"
32*4882a593Smuzhiyun " jeq 2f\n"
33*4882a593Smuzhiyun " addq.l #1,%1\n"
34*4882a593Smuzhiyun "2: subq.l #1,%2\n"
35*4882a593Smuzhiyun " jcc 1b\n"
36*4882a593Smuzhiyun : "+a" (dest), "+a" (src), "+d" (n)
37*4882a593Smuzhiyun : : "memory");
38*4882a593Smuzhiyun return xdest;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun #ifndef CONFIG_COLDFIRE
42*4882a593Smuzhiyun #define __HAVE_ARCH_STRCMP
strcmp(const char * cs,const char * ct)43*4882a593Smuzhiyun static inline int strcmp(const char *cs, const char *ct)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun char res;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun asm ("\n"
48*4882a593Smuzhiyun "1: move.b (%0)+,%2\n" /* get *cs */
49*4882a593Smuzhiyun " cmp.b (%1)+,%2\n" /* compare a byte */
50*4882a593Smuzhiyun " jne 2f\n" /* not equal, break out */
51*4882a593Smuzhiyun " tst.b %2\n" /* at end of cs? */
52*4882a593Smuzhiyun " jne 1b\n" /* no, keep going */
53*4882a593Smuzhiyun " jra 3f\n" /* strings are equal */
54*4882a593Smuzhiyun "2: sub.b -(%1),%2\n" /* *cs - *ct */
55*4882a593Smuzhiyun "3:"
56*4882a593Smuzhiyun : "+a" (cs), "+a" (ct), "=d" (res));
57*4882a593Smuzhiyun return res;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun #endif /* CONFIG_COLDFIRE */
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun #define __HAVE_ARCH_MEMMOVE
62*4882a593Smuzhiyun extern void *memmove(void *, const void *, __kernel_size_t);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun #define memcmp(d, s, n) __builtin_memcmp(d, s, n)
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun #define __HAVE_ARCH_MEMSET
67*4882a593Smuzhiyun extern void *memset(void *, int, __kernel_size_t);
68*4882a593Smuzhiyun #define memset(d, c, n) __builtin_memset(d, c, n)
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun #define __HAVE_ARCH_MEMCPY
71*4882a593Smuzhiyun extern void *memcpy(void *, const void *, __kernel_size_t);
72*4882a593Smuzhiyun #define memcpy(d, s, n) __builtin_memcpy(d, s, n)
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun #endif /* _M68K_STRING_H_ */
75