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https://github.com/edk2-porting/linux-next.git
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d6359fd783
- 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>
132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
#ifndef _M68K_STRING_H_
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#define _M68K_STRING_H_
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#include <linux/types.h>
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#include <linux/compiler.h>
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static inline size_t __kernel_strlen(const char *s)
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{
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const char *sc;
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for (sc = s; *sc++; )
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;
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return sc - s - 1;
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}
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static inline char *__kernel_strcpy(char *dest, const char *src)
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{
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char *xdest = dest;
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asm volatile ("\n"
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"1: move.b (%1)+,(%0)+\n"
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" jne 1b"
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: "+a" (dest), "+a" (src)
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: : "memory");
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return xdest;
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}
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#ifndef __IN_STRING_C
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#define __HAVE_ARCH_STRLEN
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#define strlen(s) (__builtin_constant_p(s) ? \
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__builtin_strlen(s) : \
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__kernel_strlen(s))
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#define __HAVE_ARCH_STRNLEN
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static inline size_t strnlen(const char *s, size_t count)
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{
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const char *sc = s;
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asm volatile ("\n"
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"1: subq.l #1,%1\n"
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" jcs 2f\n"
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" tst.b (%0)+\n"
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" jne 1b\n"
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" subq.l #1,%0\n"
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"2:"
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: "+a" (sc), "+d" (count));
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return sc - s;
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}
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#define __HAVE_ARCH_STRCPY
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#if __GNUC__ >= 4
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#define strcpy(d, s) (__builtin_constant_p(s) && \
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__builtin_strlen(s) <= 32 ? \
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__builtin_strcpy(d, s) : \
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__kernel_strcpy(d, s))
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#else
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#define strcpy(d, s) __kernel_strcpy(d, s)
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#endif
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#define __HAVE_ARCH_STRNCPY
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static inline char *strncpy(char *dest, const char *src, size_t n)
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{
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char *xdest = dest;
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asm volatile ("\n"
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" jra 2f\n"
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"1: move.b (%1),(%0)+\n"
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" jeq 2f\n"
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" addq.l #1,%1\n"
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"2: subq.l #1,%2\n"
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" jcc 1b\n"
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: "+a" (dest), "+a" (src), "+d" (n)
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: : "memory");
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return xdest;
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}
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#define __HAVE_ARCH_STRCAT
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#define strcat(d, s) ({ \
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char *__d = (d); \
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strcpy(__d + strlen(__d), (s)); \
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})
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#define __HAVE_ARCH_STRCHR
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static inline char *strchr(const char *s, int c)
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{
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char sc, ch = c;
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for (; (sc = *s++) != ch; ) {
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if (!sc)
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return NULL;
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}
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return (char *)s - 1;
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}
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#define __HAVE_ARCH_STRCMP
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static inline int strcmp(const char *cs, const char *ct)
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{
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char res;
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asm ("\n"
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"1: move.b (%0)+,%2\n" /* get *cs */
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" cmp.b (%1)+,%2\n" /* compare a byte */
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" jne 2f\n" /* not equal, break out */
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" tst.b %2\n" /* at end of cs? */
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" jne 1b\n" /* no, keep going */
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" jra 3f\n" /* strings are equal */
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"2: sub.b -(%1),%2\n" /* *cs - *ct */
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"3:"
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: "+a" (cs), "+a" (ct), "=d" (res));
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return res;
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}
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#define __HAVE_ARCH_MEMSET
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extern void *memset(void *, int, __kernel_size_t);
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#define memset(d, c, n) __builtin_memset(d, c, n)
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#define __HAVE_ARCH_MEMCPY
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extern void *memcpy(void *, const void *, __kernel_size_t);
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#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
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#define __HAVE_ARCH_MEMMOVE
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extern void *memmove(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMCMP
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extern int memcmp(const void *, const void *, __kernel_size_t);
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#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
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#endif
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#endif /* _M68K_STRING_H_ */
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