text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef __ASM_SH_STRING_H
  #define __ASM_SH_STRING_H
  
  #ifdef __KERNEL__
  
  /*
   * Copyright (C) 1999 Niibe Yutaka
   * But consider these trivial functions to be public domain.
   */
  
  #define __HAVE_ARCH_STRCPY
  static inline char *strcpy(char *__dest, const char *__src)
  {
  	register char *__xdest = __dest;
  	unsigned long __dummy;
  
  	__asm__ __volatile__("1:\n\t"
  			     "mov.b	@%1+, %2\n\t"
  			     "mov.b	%2, @%0\n\t"
  			     "cmp/eq	#0, %2\n\t"
  			     "bf/s	1b\n\t"
  			     " add	#1, %0\n\t"
  			     : "=r" (__dest), "=r" (__src), "=&z" (__dummy)
  			     : "0" (__dest), "1" (__src)
  			     : "memory", "t");
  
  	return __xdest;
  }
  
  #define __HAVE_ARCH_STRNCPY
  static inline char *strncpy(char *__dest, const char *__src, size_t __n)
  {
  	register char *__xdest = __dest;
  	unsigned long __dummy;
  
  	if (__n == 0)
  		return __xdest;
  
  	__asm__ __volatile__(
  		"1:\n"
  		"mov.b	@%1+, %2\n\t"
  		"mov.b	%2, @%0\n\t"
  		"cmp/eq	#0, %2\n\t"
  		"bt/s	2f\n\t"
  		" cmp/eq	%5,%1\n\t"
  		"bf/s	1b\n\t"
  		" add	#1, %0\n"
  		"2:"
  		: "=r" (__dest), "=r" (__src), "=&z" (__dummy)
  		: "0" (__dest), "1" (__src), "r" (__src+__n)
  		: "memory", "t");
  
  	return __xdest;
  }
  
  #define __HAVE_ARCH_STRCMP
  static inline int strcmp(const char *__cs, const char *__ct)
  {
  	register int __res;
  	unsigned long __dummy;
  
  	__asm__ __volatile__(
  		"mov.b	@%1+, %3\n"
  		"1:\n\t"
  		"mov.b	@%0+, %2\n\t"
  		"cmp/eq #0, %3\n\t"
  		"bt	2f\n\t"
  		"cmp/eq %2, %3\n\t"
  		"bt/s	1b\n\t"
  		" mov.b	@%1+, %3\n\t"
  		"add	#-2, %1\n\t"
  		"mov.b	@%1, %3\n\t"
  		"sub	%3, %2\n"
  		"2:"
  		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
  		: "0" (__cs), "1" (__ct)
  		: "t");
  
  	return __res;
  }
  
  #define __HAVE_ARCH_STRNCMP
  static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
  {
  	register int __res;
  	unsigned long __dummy;
  
  	if (__n == 0)
  		return 0;
  
  	__asm__ __volatile__(
  		"mov.b	@%1+, %3\n"
  		"1:\n\t"
  		"mov.b	@%0+, %2\n\t"
  		"cmp/eq %6, %0\n\t"
  		"bt/s	2f\n\t"
  		" cmp/eq #0, %3\n\t"
  		"bt/s	3f\n\t"
  		" cmp/eq %3, %2\n\t"
  		"bt/s	1b\n\t"
  		" mov.b	@%1+, %3\n\t"
  		"add	#-2, %1\n\t"
  		"mov.b	@%1, %3\n"
  		"2:\n\t"
  		"sub	%3, %2\n"
  		"3:"
  		:"=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
  		: "0" (__cs), "1" (__ct), "r" (__cs+__n)
  		: "t");
  
  	return __res;
  }
  
  #define __HAVE_ARCH_MEMSET
  extern void *memset(void *__s, int __c, size_t __count);
  
  #define __HAVE_ARCH_MEMCPY
  extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
  
  #define __HAVE_ARCH_MEMMOVE
  extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
  
  #define __HAVE_ARCH_MEMCHR
  extern void *memchr(const void *__s, int __c, size_t __n);
  
  #define __HAVE_ARCH_STRLEN
  extern size_t strlen(const char *);
  
  #endif /* __KERNEL__ */
  
  #endif /* __ASM_SH_STRING_H */
  