/arch/sh/include/asm/string_32.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef __ASM_SH_STRING_H
  3#define __ASM_SH_STRING_H
  4
  5#ifdef __KERNEL__
  6
  7/*
  8 * Copyright (C) 1999 Niibe Yutaka
  9 * But consider these trivial functions to be public domain.
 10 */
 11
 12#define __HAVE_ARCH_STRCPY
 13static inline char *strcpy(char *__dest, const char *__src)
 14{
 15	register char *__xdest = __dest;
 16	unsigned long __dummy;
 17
 18	__asm__ __volatile__("1:\n\t"
 19			     "mov.b	@%1+, %2\n\t"
 20			     "mov.b	%2, @%0\n\t"
 21			     "cmp/eq	#0, %2\n\t"
 22			     "bf/s	1b\n\t"
 23			     " add	#1, %0\n\t"
 24			     : "=r" (__dest), "=r" (__src), "=&z" (__dummy)
 25			     : "0" (__dest), "1" (__src)
 26			     : "memory", "t");
 27
 28	return __xdest;
 29}
 30
 31#define __HAVE_ARCH_STRNCPY
 32static inline char *strncpy(char *__dest, const char *__src, size_t __n)
 33{
 34	register char *__xdest = __dest;
 35	unsigned long __dummy;
 36
 37	if (__n == 0)
 38		return __xdest;
 39
 40	__asm__ __volatile__(
 41		"1:\n"
 42		"mov.b	@%1+, %2\n\t"
 43		"mov.b	%2, @%0\n\t"
 44		"cmp/eq	#0, %2\n\t"
 45		"bt/s	2f\n\t"
 46		" cmp/eq	%5,%1\n\t"
 47		"bf/s	1b\n\t"
 48		" add	#1, %0\n"
 49		"2:"
 50		: "=r" (__dest), "=r" (__src), "=&z" (__dummy)
 51		: "0" (__dest), "1" (__src), "r" (__src+__n)
 52		: "memory", "t");
 53
 54	return __xdest;
 55}
 56
 57#define __HAVE_ARCH_STRCMP
 58static inline int strcmp(const char *__cs, const char *__ct)
 59{
 60	register int __res;
 61	unsigned long __dummy;
 62
 63	__asm__ __volatile__(
 64		"mov.b	@%1+, %3\n"
 65		"1:\n\t"
 66		"mov.b	@%0+, %2\n\t"
 67		"cmp/eq #0, %3\n\t"
 68		"bt	2f\n\t"
 69		"cmp/eq %2, %3\n\t"
 70		"bt/s	1b\n\t"
 71		" mov.b	@%1+, %3\n\t"
 72		"add	#-2, %1\n\t"
 73		"mov.b	@%1, %3\n\t"
 74		"sub	%3, %2\n"
 75		"2:"
 76		: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
 77		: "0" (__cs), "1" (__ct)
 78		: "t");
 79
 80	return __res;
 81}
 82
 83#define __HAVE_ARCH_STRNCMP
 84static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
 85{
 86	register int __res;
 87	unsigned long __dummy;
 88
 89	if (__n == 0)
 90		return 0;
 91
 92	__asm__ __volatile__(
 93		"mov.b	@%1+, %3\n"
 94		"1:\n\t"
 95		"mov.b	@%0+, %2\n\t"
 96		"cmp/eq %6, %0\n\t"
 97		"bt/s	2f\n\t"
 98		" cmp/eq #0, %3\n\t"
 99		"bt/s	3f\n\t"
100		" cmp/eq %3, %2\n\t"
101		"bt/s	1b\n\t"
102		" mov.b	@%1+, %3\n\t"
103		"add	#-2, %1\n\t"
104		"mov.b	@%1, %3\n"
105		"2:\n\t"
106		"sub	%3, %2\n"
107		"3:"
108		:"=r" (__cs), "=r" (__ct), "=&r" (__res), "=&z" (__dummy)
109		: "0" (__cs), "1" (__ct), "r" (__cs+__n)
110		: "t");
111
112	return __res;
113}
114
115#define __HAVE_ARCH_MEMSET
116extern void *memset(void *__s, int __c, size_t __count);
117
118#define __HAVE_ARCH_MEMCPY
119extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
120
121#define __HAVE_ARCH_MEMMOVE
122extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
123
124#define __HAVE_ARCH_MEMCHR
125extern void *memchr(const void *__s, int __c, size_t __n);
126
127#define __HAVE_ARCH_STRLEN
128extern size_t strlen(const char *);
129
130#endif /* __KERNEL__ */
131
132#endif /* __ASM_SH_STRING_H */