mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
[PATCH] m68k: cleanup string functions
- cleanup asm of string functions - deinline strncat()/strncmp() - provide non-inlined strcpy() Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roman Zippel
Linus Torvalds
parent
7236e978a3
commit
d6359fd783
@ -1,7 +1,6 @@
|
||||
#include <linux/module.h>
|
||||
#include <linux/linkage.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/user.h>
|
||||
#include <linux/elfcore.h>
|
||||
@ -53,9 +52,6 @@ EXPORT_SYMBOL(mach_beep);
|
||||
#endif
|
||||
EXPORT_SYMBOL(dump_fpu);
|
||||
EXPORT_SYMBOL(dump_thread);
|
||||
EXPORT_SYMBOL(strnlen);
|
||||
EXPORT_SYMBOL(strrchr);
|
||||
EXPORT_SYMBOL(strstr);
|
||||
EXPORT_SYMBOL(kernel_thread);
|
||||
#ifdef CONFIG_VME
|
||||
EXPORT_SYMBOL(vme_brdtype);
|
||||
|
||||
@ -1,6 +1,19 @@
|
||||
/*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file COPYING in the main directory of this archive
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#define __IN_STRING_C
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
char *strcpy(char *dest, const char *src)
|
||||
{
|
||||
return __kernel_strcpy(dest, src);
|
||||
}
|
||||
EXPORT_SYMBOL(strcpy);
|
||||
|
||||
void *memset(void *s, int c, size_t count)
|
||||
{
|
||||
|
||||
@ -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;
|
||||
const char *sc;
|
||||
|
||||
__asm__ __volatile__
|
||||
("1:\tmoveb %1@+,%0@+\n\t"
|
||||
"jne 1b"
|
||||
: "=a" (dest), "=a" (src)
|
||||
: "0" (dest), "1" (src) : "memory");
|
||||
return xdest;
|
||||
for (sc = s; *sc++; )
|
||||
;
|
||||
return sc - s - 1;
|
||||
}
|
||||
|
||||
#define __HAVE_ARCH_STRNCPY
|
||||
static inline char * strncpy(char *dest, const char *src, size_t n)
|
||||
static inline char *__kernel_strcpy(char *dest, const char *src)
|
||||
{
|
||||
char *xdest = dest;
|
||||
char *xdest = dest;
|
||||
|
||||
if (n == 0)
|
||||
return xdest;
|
||||
asm volatile ("\n"
|
||||
"1: move.b (%1)+,(%0)+\n"
|
||||
" jne 1b"
|
||||
: "+a" (dest), "+a" (src)
|
||||
: : "memory");
|
||||
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;
|
||||
#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
|
||||
static inline char * strcat(char * dest, const char * src)
|
||||
{
|
||||
char *tmp = dest;
|
||||
|
||||
while (*dest)
|
||||
dest++;
|
||||
while ((*dest++ = *src++))
|
||||
;
|
||||
|
||||
return tmp;
|
||||
}
|
||||
|
||||
#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;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return tmp;
|
||||
}
|
||||
#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)
|
||||
static inline char *strchr(const char *s, int c)
|
||||
{
|
||||
const char ch = c;
|
||||
char sc, ch = c;
|
||||
|
||||
for(; *s != ch; ++s)
|
||||
if (*s == '\0')
|
||||
return( NULL );
|
||||
return( (char *) s);
|
||||
for (; (sc = *s++) != ch; ) {
|
||||
if (!sc)
|
||||
return NULL;
|
||||
}
|
||||
return (char *)s - 1;
|
||||
}
|
||||
|
||||
/* strstr !! */
|
||||
|
||||
#define __HAVE_ARCH_STRLEN
|
||||
static inline size_t strlen(const char * s)
|
||||
{
|
||||
const char *sc;
|
||||
for (sc = s; *sc != '\0'; ++sc) ;
|
||||
return(sc - s);
|
||||
}
|
||||
|
||||
/* strnlen !! */
|
||||
|
||||
#define __HAVE_ARCH_STRCMP
|
||||
static inline int strcmp(const char * cs,const char * ct)
|
||||
static inline int strcmp(const char *cs, const char *ct)
|
||||
{
|
||||
char __res;
|
||||
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;
|
||||
}
|
||||
|
||||
#define __HAVE_ARCH_STRNCMP
|
||||
static inline int strncmp(const char * cs,const char * ct,size_t count)
|
||||
{
|
||||
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;
|
||||
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_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user