f9d693d237
The m68k arch implements its own memcmp() function. It is not optimized
in any way (it is the most strait forward coding of memcmp you can get).
Remove it and use the kernels standard memcmp() implementation.
This also goes part of the way to fixing a regression caused by commit
ea61bc461d ("m68k/m68knommu: merge MMU and
non-MMU string.h"), which breaks non-coldfire non-mmu builds (which is
the 68x328 and 68360 families). They currently have no memcmp() function
defined, since there is none in the m68knommu/lib functions.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
120 lines
2.5 KiB
C
120 lines
2.5 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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#ifndef CONFIG_COLDFIRE
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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_MEMMOVE
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extern void *memmove(void *, const void *, __kernel_size_t);
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#endif /* CONFIG_COLDFIRE */
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#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
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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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#endif
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#endif /* _M68K_STRING_H_ */
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