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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ALPHA_STRING_H__
   3#define __ALPHA_STRING_H__
   4
   5#ifdef __KERNEL__
   6
   7/*
   8 * GCC of any recent vintage doesn't do stupid things with bcopy.
   9 * EGCS 1.1 knows all about expanding memcpy inline, others don't.
  10 *
  11 * Similarly for a memset with data = 0.
  12 */
  13
  14#define __HAVE_ARCH_MEMCPY
  15extern void * memcpy(void *, const void *, size_t);
  16#define __HAVE_ARCH_MEMMOVE
  17extern void * memmove(void *, const void *, size_t);
  18
  19/* For backward compatibility with modules.  Unused otherwise.  */
  20extern void * __memcpy(void *, const void *, size_t);
  21
  22#define memcpy __builtin_memcpy
  23
  24#define __HAVE_ARCH_MEMSET
  25extern void * __constant_c_memset(void *, unsigned long, size_t);
  26extern void * ___memset(void *, int, size_t);
  27extern void * __memset(void *, int, size_t);
  28extern void * memset(void *, int, size_t);
  29
  30/* For gcc 3.x, we cannot have the inline function named "memset" because
  31   the __builtin_memset will attempt to resolve to the inline as well,
  32   leading to a "sorry" about unimplemented recursive inlining.  */
  33extern inline void *__memset(void *s, int c, size_t n)
  34{
  35        if (__builtin_constant_p(c)) {
  36                if (__builtin_constant_p(n)) {
  37                        return __builtin_memset(s, c, n);
  38                } else {
  39                        unsigned long c8 = (c & 0xff) * 0x0101010101010101UL;
  40                        return __constant_c_memset(s, c8, n);
  41                }
  42        }
  43        return ___memset(s, c, n);
  44}
  45
  46#define memset __memset
  47
  48#define __HAVE_ARCH_STRCPY
  49extern char * strcpy(char *,const char *);
  50#define __HAVE_ARCH_STRNCPY
  51extern char * strncpy(char *, const char *, size_t);
  52#define __HAVE_ARCH_STRCAT
  53extern char * strcat(char *, const char *);
  54#define __HAVE_ARCH_STRNCAT
  55extern char * strncat(char *, const char *, size_t);
  56#define __HAVE_ARCH_STRCHR
  57extern char * strchr(const char *,int);
  58#define __HAVE_ARCH_STRRCHR
  59extern char * strrchr(const char *,int);
  60#define __HAVE_ARCH_STRLEN
  61extern size_t strlen(const char *);
  62#define __HAVE_ARCH_MEMCHR
  63extern void * memchr(const void *, int, size_t);
  64
  65/* The following routine is like memset except that it writes 16-bit
  66   aligned values.  The DEST and COUNT parameters must be even for 
  67   correct operation.  */
  68
  69#define __HAVE_ARCH_MEMSET16
  70extern void * __memset16(void *dest, unsigned short, size_t count);
  71static inline void *memset16(uint16_t *p, uint16_t v, size_t n)
  72{
  73        if (__builtin_constant_p(v))
  74                return __constant_c_memset(p, 0x0001000100010001UL * v, n * 2);
  75        return __memset16(p, v, n * 2);
  76}
  77
  78#endif /* __KERNEL__ */
  79
  80#endif /* __ALPHA_STRING_H__ */
  81