root/arch/alpha/include/asm/string.h

INCLUDED FROM

DEFINITIONS

1. __memset
2. memset16

   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
  15 extern void * memcpy(void *, const void *, size_t);
  16 #define __HAVE_ARCH_MEMMOVE
  17 extern void * memmove(void *, const void *, size_t);
  18 
  19 /* For backward compatibility with modules.  Unused otherwise.  */
  20 extern void * __memcpy(void *, const void *, size_t);
  21 
  22 #define memcpy __builtin_memcpy
  23 
  24 #define __HAVE_ARCH_MEMSET
  25 extern void * __constant_c_memset(void *, unsigned long, size_t);
  26 extern void * ___memset(void *, int, size_t);
  27 extern void * __memset(void *, int, size_t);
  28 extern 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.  */
  33 extern 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
  49 extern char * strcpy(char *,const char *);
  50 #define __HAVE_ARCH_STRNCPY
  51 extern char * strncpy(char *, const char *, size_t);
  52 #define __HAVE_ARCH_STRCAT
  53 extern char * strcat(char *, const char *);
  54 #define __HAVE_ARCH_STRNCAT
  55 extern char * strncat(char *, const char *, size_t);
  56 #define __HAVE_ARCH_STRCHR
  57 extern char * strchr(const char *,int);
  58 #define __HAVE_ARCH_STRRCHR
  59 extern char * strrchr(const char *,int);
  60 #define __HAVE_ARCH_STRLEN
  61 extern size_t strlen(const char *);
  62 #define __HAVE_ARCH_MEMCHR
  63 extern 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
  70 extern void * __memset16(void *dest, unsigned short, size_t count);
  71 static 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__ */