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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | #ifndef _M68K_STRING_H_
#define _M68K_STRING_H_
#include <linux/types.h>
#include <linux/compiler.h>
static inline size_t __kernel_strlen(const char *s)
{
const char *sc;
for (sc = s; *sc++; )
;
return sc - s - 1;
}
static inline char *__kernel_strcpy(char *dest, const char *src)
{
char *xdest = dest;
asm volatile ("\n"
"1: move.b (%1)+,(%0)+\n"
" jne 1b"
: "+a" (dest), "+a" (src)
: : "memory");
return xdest;
}
#ifndef __IN_STRING_C
#define __HAVE_ARCH_STRLEN
#define strlen(s) (__builtin_constant_p(s) ? \
__builtin_strlen(s) : \
__kernel_strlen(s))
#define __HAVE_ARCH_STRNLEN
static inline size_t strnlen(const char *s, size_t count)
{
const char *sc = s;
asm volatile ("\n"
"1: subq.l #1,%1\n"
" jcs 2f\n"
" tst.b (%0)+\n"
" jne 1b\n"
" subq.l #1,%0\n"
"2:"
: "+a" (sc), "+d" (count));
return sc - s;
}
#define __HAVE_ARCH_STRCPY
#if __GNUC__ >= 4
#define strcpy(d, s) (__builtin_constant_p(s) && \
__builtin_strlen(s) <= 32 ? \
__builtin_strcpy(d, s) : \
__kernel_strcpy(d, s))
#else
#define strcpy(d, s) __kernel_strcpy(d, s)
#endif
#define __HAVE_ARCH_STRNCPY
static inline char *strncpy(char *dest, const char *src, size_t n)
{
char *xdest = dest;
asm volatile ("\n"
" jra 2f\n"
"1: move.b (%1),(%0)+\n"
" jeq 2f\n"
" addq.l #1,%1\n"
"2: subq.l #1,%2\n"
" jcc 1b\n"
: "+a" (dest), "+a" (src), "+d" (n)
: : "memory");
return xdest;
}
#define __HAVE_ARCH_STRCAT
#define strcat(d, s) ({ \
char *__d = (d); \
strcpy(__d + strlen(__d), (s)); \
})
#define __HAVE_ARCH_STRCHR
static inline char *strchr(const char *s, int c)
{
char sc, ch = c;
for (; (sc = *s++) != ch; ) {
if (!sc)
return NULL;
}
return (char *)s - 1;
}
#define __HAVE_ARCH_STRCMP
static inline int strcmp(const char *cs, const char *ct)
{
char res;
asm ("\n"
"1: move.b (%0)+,%2\n" /* get *cs */
" cmp.b (%1)+,%2\n" /* compare a byte */
" jne 2f\n" /* not equal, break out */
" tst.b %2\n" /* at end of cs? */
" jne 1b\n" /* no, keep going */
" jra 3f\n" /* strings are equal */
"2: sub.b -(%1),%2\n" /* *cs - *ct */
"3:"
: "+a" (cs), "+a" (ct), "=d" (res));
return res;
}
#define __HAVE_ARCH_MEMSET
extern void *memset(void *, int, __kernel_size_t);
#define memset(d, c, n) __builtin_memset(d, c, n)
#define __HAVE_ARCH_MEMCPY
extern void *memcpy(void *, const void *, __kernel_size_t);
#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
#define __HAVE_ARCH_MEMMOVE
extern void *memmove(void *, const void *, __kernel_size_t);
#define __HAVE_ARCH_MEMCMP
extern int memcmp(const void *, const void *, __kernel_size_t);
#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
#endif
#endif /* _M68K_STRING_H_ */
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