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__ */
81
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