LXR linux/arch/s390/include/asm/string.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 *  S390 version
   4 *    Copyright IBM Corp. 1999
   5 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
   6 */
   7
   8#ifndef _S390_STRING_H_
   9#define _S390_STRING_H_
  10
  11#ifndef _LINUX_TYPES_H
  12#include <linux/types.h>
  13#endif
  14
  15#define __HAVE_ARCH_MEMCHR      /* inline & arch function */
  16#define __HAVE_ARCH_MEMCMP      /* arch function */
  17#define __HAVE_ARCH_MEMCPY      /* gcc builtin & arch function */
  18#define __HAVE_ARCH_MEMMOVE     /* gcc builtin & arch function */
  19#define __HAVE_ARCH_MEMSCAN     /* inline & arch function */
  20#define __HAVE_ARCH_MEMSET      /* gcc builtin & arch function */
  21#define __HAVE_ARCH_MEMSET16    /* arch function */
  22#define __HAVE_ARCH_MEMSET32    /* arch function */
  23#define __HAVE_ARCH_MEMSET64    /* arch function */
  24#define __HAVE_ARCH_STRCAT      /* inline & arch function */
  25#define __HAVE_ARCH_STRCMP      /* arch function */
  26#define __HAVE_ARCH_STRCPY      /* inline & arch function */
  27#define __HAVE_ARCH_STRLCAT     /* arch function */
  28#define __HAVE_ARCH_STRLCPY     /* arch function */
  29#define __HAVE_ARCH_STRLEN      /* inline & arch function */
  30#define __HAVE_ARCH_STRNCAT     /* arch function */
  31#define __HAVE_ARCH_STRNCPY     /* arch function */
  32#define __HAVE_ARCH_STRNLEN     /* inline & arch function */
  33#define __HAVE_ARCH_STRRCHR     /* arch function */
  34#define __HAVE_ARCH_STRSTR      /* arch function */
  35
  36/* Prototypes for non-inlined arch strings functions. */
  37int memcmp(const void *s1, const void *s2, size_t n);
  38void *memcpy(void *dest, const void *src, size_t n);
  39void *memset(void *s, int c, size_t n);
  40void *memmove(void *dest, const void *src, size_t n);
  41int strcmp(const char *s1, const char *s2);
  42size_t strlcat(char *dest, const char *src, size_t n);
  43size_t strlcpy(char *dest, const char *src, size_t size);
  44char *strncat(char *dest, const char *src, size_t n);
  45char *strncpy(char *dest, const char *src, size_t n);
  46char *strrchr(const char *s, int c);
  47char *strstr(const char *s1, const char *s2);
  48
  49#undef __HAVE_ARCH_STRCHR
  50#undef __HAVE_ARCH_STRNCHR
  51#undef __HAVE_ARCH_STRNCMP
  52#undef __HAVE_ARCH_STRPBRK
  53#undef __HAVE_ARCH_STRSEP
  54#undef __HAVE_ARCH_STRSPN
  55
  56void *__memset16(uint16_t *s, uint16_t v, size_t count);
  57void *__memset32(uint32_t *s, uint32_t v, size_t count);
  58void *__memset64(uint64_t *s, uint64_t v, size_t count);
  59
  60static inline void *memset16(uint16_t *s, uint16_t v, size_t count)
  61{
  62        return __memset16(s, v, count * sizeof(v));
  63}
  64
  65static inline void *memset32(uint32_t *s, uint32_t v, size_t count)
  66{
  67        return __memset32(s, v, count * sizeof(v));
  68}
  69
  70static inline void *memset64(uint64_t *s, uint64_t v, size_t count)
  71{
  72        return __memset64(s, v, count * sizeof(v));
  73}
  74
  75#if !defined(IN_ARCH_STRING_C) && (!defined(CONFIG_FORTIFY_SOURCE) || defined(__NO_FORTIFY))
  76
  77static inline void *memchr(const void * s, int c, size_t n)
  78{
  79        register int r0 asm("0") = (char) c;
  80        const void *ret = s + n;
  81
  82        asm volatile(
  83                "0:     srst    %0,%1\n"
  84                "       jo      0b\n"
  85                "       jl      1f\n"
  86                "       la      %0,0\n"
  87                "1:"
  88                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
  89        return (void *) ret;
  90}
  91
  92static inline void *memscan(void *s, int c, size_t n)
  93{
  94        register int r0 asm("0") = (char) c;
  95        const void *ret = s + n;
  96
  97        asm volatile(
  98                "0:     srst    %0,%1\n"
  99                "       jo      0b\n"
 100                : "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
 101        return (void *) ret;
 102}
 103
 104static inline char *strcat(char *dst, const char *src)
 105{
 106        register int r0 asm("0") = 0;
 107        unsigned long dummy;
 108        char *ret = dst;
 109
 110        asm volatile(
 111                "0:     srst    %0,%1\n"
 112                "       jo      0b\n"
 113                "1:     mvst    %0,%2\n"
 114                "       jo      1b"
 115                : "=&a" (dummy), "+a" (dst), "+a" (src)
 116                : "d" (r0), "0" (0) : "cc", "memory" );
 117        return ret;
 118}
 119
 120static inline char *strcpy(char *dst, const char *src)
 121{
 122        register int r0 asm("0") = 0;
 123        char *ret = dst;
 124
 125        asm volatile(
 126                "0:     mvst    %0,%1\n"
 127                "       jo      0b"
 128                : "+&a" (dst), "+&a" (src) : "d" (r0)
 129                : "cc", "memory");
 130        return ret;
 131}
 132
 133static inline size_t strlen(const char *s)
 134{
 135        register unsigned long r0 asm("0") = 0;
 136        const char *tmp = s;
 137
 138        asm volatile(
 139                "0:     srst    %0,%1\n"
 140                "       jo      0b"
 141                : "+d" (r0), "+a" (tmp) :  : "cc", "memory");
 142        return r0 - (unsigned long) s;
 143}
 144
 145static inline size_t strnlen(const char * s, size_t n)
 146{
 147        register int r0 asm("0") = 0;
 148        const char *tmp = s;
 149        const char *end = s + n;
 150
 151        asm volatile(
 152                "0:     srst    %0,%1\n"
 153                "       jo      0b"
 154                : "+a" (end), "+a" (tmp) : "d" (r0)  : "cc", "memory");
 155        return end - s;
 156}
 157#else /* IN_ARCH_STRING_C */
 158void *memchr(const void * s, int c, size_t n);
 159void *memscan(void *s, int c, size_t n);
 160char *strcat(char *dst, const char *src);
 161char *strcpy(char *dst, const char *src);
 162size_t strlen(const char *s);
 163size_t strnlen(const char * s, size_t n);
 164#endif /* !IN_ARCH_STRING_C */
 165
 166#endif /* __S390_STRING_H_ */
 167