/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_STRING_H
#define __ASM_SH_STRING_H

/*
 * 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_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 /* __ASM_SH_STRING_H */