arch/riscv/include/asm/string.h

   1 /*
   2  * Copyright (C) 2011 Andes Technology Corporation
   3  * Copyright (C) 2010 Shawn Lin (nobuhiro@andestech.com)
   4  * Copyright (C) 2011 Macpaul Lin (macpaul@andestech.com)
   5  * Copyright (C) 2017 Rick Chen (rick@andestech.com)
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file "COPYING" in the main directory of this archive
   9  * for more details.
  10  */
  11
  12 #ifndef __ASM_RISCV_STRING_H
  13 #define __ASM_RISCV_STRING_H
  14
  15 /*
  16  * We don't do inline string functions, since the
  17  * optimised inline asm versions are not small.
  18  */
  19
  20 #undef __HAVE_ARCH_STRRCHR
  21 #undef __HAVE_ARCH_STRCHR
  22 #undef __HAVE_ARCH_MEMCPY
  23 #undef __HAVE_ARCH_MEMMOVE
  24 #undef __HAVE_ARCH_MEMCHR
  25 #undef __HAVE_ARCH_MEMZERO
  26 #undef __HAVE_ARCH_MEMSET
  27
  28 #ifdef CONFIG_MARCO_MEMSET
  29 #define memset(_p, _v, _n)      \
  30         (typeof(_p) (p) = (_p); \
  31          typeof(_v) (v) = (_v); \
  32          typeof(_n) (n) = (_n); \
  33          {                                                              \
  34                 if ((n) != 0) {                                         \
  35                         if (__builtin_constant_p((v)) && (v) == 0)      \
  36                                 __memzero((p), (n));                    \
  37                         else                                            \
  38                                 memset((p), (v), (n));                  \
  39                 }                                                       \
  40                 (p);                                                    \
  41         })
  42
  43 #define memzero(_p, _n) \
  44         (typeof(_p) (p) = (_p); \
  45          typeof(_n) (n) = (_n); \
  46          { if ((n) != 0) __memzero((p), (n)); (p); })
  47 #endif
  48
  49 #endif /* __ASM_RISCV_STRING_H */