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 */
50