diff options
Diffstat (limited to 'include/asm-m68k')
| -rw-r--r-- | include/asm-m68k/string.h | 198 |
1 files changed, 88 insertions, 110 deletions
diff --git a/include/asm-m68k/string.h b/include/asm-m68k/string.h index 6c59215b285e..2eb7df1e0f5d 100644 --- a/include/asm-m68k/string.h +++ b/include/asm-m68k/string.h @@ -1,138 +1,114 @@ #ifndef _M68K_STRING_H_ #define _M68K_STRING_H_ -#include <asm/setup.h> -#include <asm/page.h> +#include <linux/types.h> +#include <linux/compiler.h> -#define __HAVE_ARCH_STRCPY -static inline char * strcpy(char * dest,const char *src) +static inline size_t __kernel_strlen(const char *s) { - char *xdest = dest; - - __asm__ __volatile__ - ("1:\tmoveb %1@+,%0@+\n\t" - "jne 1b" - : "=a" (dest), "=a" (src) - : "0" (dest), "1" (src) : "memory"); - return xdest; -} + const char *sc; -#define __HAVE_ARCH_STRNCPY -static inline char * strncpy(char *dest, const char *src, size_t n) -{ - char *xdest = dest; - - if (n == 0) - return xdest; - - __asm__ __volatile__ - ("1:\tmoveb %1@+,%0@+\n\t" - "jeq 2f\n\t" - "subql #1,%2\n\t" - "jne 1b\n\t" - "2:" - : "=a" (dest), "=a" (src), "=d" (n) - : "0" (dest), "1" (src), "2" (n) - : "memory"); - return xdest; + for (sc = s; *sc++; ) + ; + return sc - s - 1; } -#define __HAVE_ARCH_STRCAT -static inline char * strcat(char * dest, const char * src) +static inline char *__kernel_strcpy(char *dest, const char *src) { - char *tmp = dest; - - while (*dest) - dest++; - while ((*dest++ = *src++)) - ; - - return tmp; + char *xdest = dest; + + asm volatile ("\n" + "1: move.b (%1)+,(%0)+\n" + " jne 1b" + : "+a" (dest), "+a" (src) + : : "memory"); + return xdest; } -#define __HAVE_ARCH_STRNCAT -static inline char * strncat(char *dest, const char *src, size_t count) -{ - char *tmp = dest; - - if (count) { - while (*dest) - dest++; - while ((*dest++ = *src++)) { - if (--count == 0) { - *dest++='\0'; - break; - } - } - } +#ifndef __IN_STRING_C - return tmp; -} +#define __HAVE_ARCH_STRLEN +#define strlen(s) (__builtin_constant_p(s) ? \ + __builtin_strlen(s) : \ + __kernel_strlen(s)) -#define __HAVE_ARCH_STRCHR -static inline char * strchr(const char * s, int c) +#define __HAVE_ARCH_STRNLEN +static inline size_t strnlen(const char *s, size_t count) { - const char ch = c; - - for(; *s != ch; ++s) - if (*s == '\0') - return( NULL ); - return( (char *) s); + 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; } -/* strstr !! */ +#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_STRLEN -static inline size_t strlen(const char * s) +#define __HAVE_ARCH_STRNCPY +static inline char *strncpy(char *dest, const char *src, size_t n) { - const char *sc; - for (sc = s; *sc != '\0'; ++sc) ; - return(sc - s); + 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; } -/* strnlen !! */ +#define __HAVE_ARCH_STRCAT +#define strcat(d, s) ({ \ + char *__d = (d); \ + strcpy(__d + strlen(__d), (s)); \ +}) -#define __HAVE_ARCH_STRCMP -static inline int strcmp(const char * cs,const char * ct) +#define __HAVE_ARCH_STRCHR +static inline char *strchr(const char *s, int c) { - char __res; - - __asm__ - ("1:\tmoveb %0@+,%2\n\t" /* get *cs */ - "cmpb %1@+,%2\n\t" /* compare a byte */ - "jne 2f\n\t" /* not equal, break out */ - "tstb %2\n\t" /* at end of cs? */ - "jne 1b\n\t" /* no, keep going */ - "jra 3f\n\t" /* strings are equal */ - "2:\tsubb %1@-,%2\n\t" /* *cs - *ct */ - "3:" - : "=a" (cs), "=a" (ct), "=d" (__res) - : "0" (cs), "1" (ct)); - return __res; + char sc, ch = c; + + for (; (sc = *s++) != ch; ) { + if (!sc) + return NULL; + } + return (char *)s - 1; } -#define __HAVE_ARCH_STRNCMP -static inline int strncmp(const char * cs,const char * ct,size_t count) +#define __HAVE_ARCH_STRCMP +static inline int strcmp(const char *cs, const char *ct) { - char __res; - - if (!count) - return 0; - __asm__ - ("1:\tmovb %0@+,%3\n\t" /* get *cs */ - "cmpb %1@+,%3\n\t" /* compare a byte */ - "jne 3f\n\t" /* not equal, break out */ - "tstb %3\n\t" /* at end of cs? */ - "jeq 4f\n\t" /* yes, all done */ - "subql #1,%2\n\t" /* no, adjust count */ - "jne 1b\n\t" /* more to do, keep going */ - "2:\tmoveq #0,%3\n\t" /* strings are equal */ - "jra 4f\n\t" - "3:\tsubb %1@-,%3\n\t" /* *cs - *ct */ - "4:" - : "=a" (cs), "=a" (ct), "=d" (count), "=d" (__res) - : "0" (cs), "1" (ct), "2" (count)); - return __res; + 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 @@ -150,4 +126,6 @@ extern void *memmove(void *, const void *, __kernel_size_t); 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_ */ |