[linux-2.6-block.git] / include / asm-sparc / string.h

/* $Id: string.h,v 1.36 2001/12/21 00:54:31 davem Exp $
 * string.h: External definitions for optimized assembly string
 *           routines for the Linux Kernel.
 *
 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#ifndef __SPARC_STRING_H__
#define __SPARC_STRING_H__

#include <asm/page.h>

/* Really, userland/ksyms should not see any of this stuff. */

#ifdef __KERNEL__

extern void __memmove(void *,const void *,__kernel_size_t);
extern __kernel_size_t __memcpy(void *,const void *,__kernel_size_t);
extern __kernel_size_t __memset(void *,int,__kernel_size_t);

#ifndef EXPORT_SYMTAB_STROPS

/* First the mem*() things. */
#define __HAVE_ARCH_MEMMOVE
#undef memmove
#define memmove(_to, _from, _n) \
({ \
	void *_t = (_to); \
	__memmove(_t, (_from), (_n)); \
	_t; \
})

#define __HAVE_ARCH_MEMCPY

static inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
{
	extern void __copy_1page(void *, const void *);

	if(n <= 32) {
		__builtin_memcpy(to, from, n);
	} else if (((unsigned int) to & 7) != 0) {
		/* Destination is not aligned on the double-word boundary */
		__memcpy(to, from, n);
	} else {
		switch(n) {
		case PAGE_SIZE:
			__copy_1page(to, from);
			break;
		default:
			__memcpy(to, from, n);
			break;
		}
	}
	return to;
}

static inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
{
	__memcpy(to, from, n);
	return to;
}

#undef memcpy
#define memcpy(t, f, n) \
(__builtin_constant_p(n) ? \
 __constant_memcpy((t),(f),(n)) : \
 __nonconstant_memcpy((t),(f),(n)))

#define __HAVE_ARCH_MEMSET

static inline void *__constant_c_and_count_memset(void *s, char c, __kernel_size_t count)
{
	extern void bzero_1page(void *);
	extern __kernel_size_t __bzero(void *, __kernel_size_t);

	if(!c) {
		if(count == PAGE_SIZE)
			bzero_1page(s);
		else
			__bzero(s, count);
	} else {
		__memset(s, c, count);
	}
	return s;
}

static inline void *__constant_c_memset(void *s, char c, __kernel_size_t count)
{
	extern __kernel_size_t __bzero(void *, __kernel_size_t);

	if(!c)
		__bzero(s, count);
	else
		__memset(s, c, count);
	return s;
}

static inline void *__nonconstant_memset(void *s, char c, __kernel_size_t count)
{
	__memset(s, c, count);
	return s;
}

#undef memset
#define memset(s, c, count) \
(__builtin_constant_p(c) ? (__builtin_constant_p(count) ? \
                            __constant_c_and_count_memset((s), (c), (count)) : \
                            __constant_c_memset((s), (c), (count))) \
                          : __nonconstant_memset((s), (c), (count)))

#define __HAVE_ARCH_MEMSCAN

#undef memscan
#define memscan(__arg0, __char, __arg2)						\
({										\
	extern void *__memscan_zero(void *, size_t);				\
	extern void *__memscan_generic(void *, int, size_t);			\
	void *__retval, *__addr = (__arg0);					\
	size_t __size = (__arg2);						\
										\
	if(__builtin_constant_p(__char) && !(__char))				\
		__retval = __memscan_zero(__addr, __size);			\
	else									\
		__retval = __memscan_generic(__addr, (__char), __size);		\
										\
	__retval;								\
})

#define __HAVE_ARCH_MEMCMP
extern int memcmp(const void *,const void *,__kernel_size_t);

/* Now the str*() stuff... */
#define __HAVE_ARCH_STRLEN
extern __kernel_size_t strlen(const char *);

#define __HAVE_ARCH_STRNCMP

extern int __strncmp(const char *, const char *, __kernel_size_t);

static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
{
	register int retval;
	switch(count) {
	case 0: return 0;
	case 1: return (src[0] - dest[0]);
	case 2: retval = (src[0] - dest[0]);
		if(!retval && src[0])
		  retval = (src[1] - dest[1]);
		return retval;
	case 3: retval = (src[0] - dest[0]);
		if(!retval && src[0]) {
		  retval = (src[1] - dest[1]);
		  if(!retval && src[1])
		    retval = (src[2] - dest[2]);
		}
		return retval;
	case 4: retval = (src[0] - dest[0]);
		if(!retval && src[0]) {
		  retval = (src[1] - dest[1]);
		  if(!retval && src[1]) {
		    retval = (src[2] - dest[2]);
		    if (!retval && src[2])
		      retval = (src[3] - dest[3]);
		  }
		}
		return retval;
	case 5: retval = (src[0] - dest[0]);
		if(!retval && src[0]) {
		  retval = (src[1] - dest[1]);
		  if(!retval && src[1]) {
		    retval = (src[2] - dest[2]);
		    if (!retval && src[2]) {
		      retval = (src[3] - dest[3]);
		      if (!retval && src[3])
		        retval = (src[4] - dest[4]);
		    }
		  }
		}
		return retval;
	default:
		retval = (src[0] - dest[0]);
		if(!retval && src[0]) {
		  retval = (src[1] - dest[1]);
		  if(!retval && src[1]) {
		    retval = (src[2] - dest[2]);
		    if(!retval && src[2])
		      retval = __strncmp(src+3,dest+3,count-3);
		  }
		}
		return retval;
	}
}

#undef strncmp
#define strncmp(__arg0, __arg1, __arg2)	\
(__builtin_constant_p(__arg2) ?	\
 __constant_strncmp(__arg0, __arg1, __arg2) : \
 __strncmp(__arg0, __arg1, __arg2))
 
#endif /* !EXPORT_SYMTAB_STROPS */

#endif /* __KERNEL__ */

#endif /* !(__SPARC_STRING_H__) */
Commit	Line	Data
1da177e4 LT	1	/* $Id: string.h,v 1.36 2001/12/21 00:54:31 davem Exp $
	2	* string.h: External definitions for optimized assembly string
	3	* routines for the Linux Kernel.
	4	*
	5	* Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
	6	* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	7	*/
	8
	9	#ifndef __SPARC_STRING_H__
	10	#define __SPARC_STRING_H__
	11
	12	#include <asm/page.h>
	13
	14	/* Really, userland/ksyms should not see any of this stuff. */
	15
	16	#ifdef __KERNEL__
	17
	18	extern void __memmove(void ,const void ,__kernel_size_t);
	19	extern __kernel_size_t __memcpy(void ,const void ,__kernel_size_t);
	20	extern __kernel_size_t __memset(void *,int,__kernel_size_t);
	21
	22	#ifndef EXPORT_SYMTAB_STROPS
	23
	24	/* First the mem() things. /
	25	#define __HAVE_ARCH_MEMMOVE
	26	#undef memmove
	27	#define memmove(_to, _from, _n) \
	28	({ \
	29	void *_t = (_to); \
	30	__memmove(_t, (_from), (_n)); \
	31	_t; \
	32	})
	33
	34	#define __HAVE_ARCH_MEMCPY
	35
	36	static inline void __constant_memcpy(void to, const void *from, __kernel_size_t n)
	37	{
	38	extern void __copy_1page(void , const void );
	39
	40	if(n <= 32) {
	41	__builtin_memcpy(to, from, n);
	42	} else if (((unsigned int) to & 7) != 0) {
	43	/* Destination is not aligned on the double-word boundary */
	44	__memcpy(to, from, n);
	45	} else {
	46	switch(n) {
	47	case PAGE_SIZE:
	48	__copy_1page(to, from);
	49	break;
	50	default:
	51	__memcpy(to, from, n);
	52	break;
	53	}
	54	}
	55	return to;
	56	}
	57
	58	static inline void __nonconstant_memcpy(void to, const void *from, __kernel_size_t n)
	59	{
	60	__memcpy(to, from, n);
	61	return to;
	62	}
	63
	64	#undef memcpy
65	#define memcpy(t, f, n) \
66	(__builtin_constant_p(n) ? \
67	__constant_memcpy((t),(f),(n)) : \
68	__nonconstant_memcpy((t),(f),(n)))
69
70	#define __HAVE_ARCH_MEMSET
71
72	static inline void __constant_c_and_count_memset(void s, char c, __kernel_size_t count)
73	{
74	extern void bzero_1page(void *);
75	extern __kernel_size_t __bzero(void *, __kernel_size_t);
76
77	if(!c) {
78	if(count == PAGE_SIZE)
79	bzero_1page(s);
80	else
81	__bzero(s, count);
82	} else {
83	__memset(s, c, count);
84	}
85	return s;
86	}
87
88	static inline void __constant_c_memset(void s, char c, __kernel_size_t count)
89	{
90	extern __kernel_size_t __bzero(void *, __kernel_size_t);
91
92	if(!c)
93	__bzero(s, count);
94	else
95	__memset(s, c, count);
96	return s;
97	}
98
99	static inline void __nonconstant_memset(void s, char c, __kernel_size_t count)
100	{
101	__memset(s, c, count);
102	return s;
103	}
104
105	#undef memset
106	#define memset(s, c, count) \
107	(__builtin_constant_p(c) ? (__builtin_constant_p(count) ? \
108	__constant_c_and_count_memset((s), (c), (count)) : \
109	__constant_c_memset((s), (c), (count))) \
110	: __nonconstant_memset((s), (c), (count)))
111
112	#define __HAVE_ARCH_MEMSCAN
113
114	#undef memscan
115	#define memscan(__arg0, __char, __arg2) \
116	({ \
117	extern void __memscan_zero(void , size_t); \
118	extern void __memscan_generic(void , int, size_t); \
119	void __retval, __addr = (__arg0); \
120	size_t __size = (__arg2); \
121	\
122	if(__builtin_constant_p(__char) && !(__char)) \
123	__retval = __memscan_zero(__addr, __size); \
124	else \
125	__retval = __memscan_generic(__addr, (__char), __size); \
126	\
127	__retval; \
128	})
129
130	#define __HAVE_ARCH_MEMCMP
131	extern int memcmp(const void ,const void ,__kernel_size_t);
132
133	/* Now the str() stuff... /
134	#define __HAVE_ARCH_STRLEN
135	extern __kernel_size_t strlen(const char *);
136
137	#define __HAVE_ARCH_STRNCMP
138
139	extern int __strncmp(const char , const char , __kernel_size_t);
140
141	static inline int __constant_strncmp(const char src, const char dest, __kernel_size_t count)
142	{
143	register int retval;
144	switch(count) {
145	case 0: return 0;
146	case 1: return (src[0] - dest[0]);
147	case 2: retval = (src[0] - dest[0]);
148	if(!retval && src[0])
149	retval = (src[1] - dest[1]);
150	return retval;
151	case 3: retval = (src[0] - dest[0]);
152	if(!retval && src[0]) {
153	retval = (src[1] - dest[1]);
154	if(!retval && src[1])
155	retval = (src[2] - dest[2]);
156	}
157	return retval;
158	case 4: retval = (src[0] - dest[0]);
159	if(!retval && src[0]) {
160	retval = (src[1] - dest[1]);
161	if(!retval && src[1]) {
162	retval = (src[2] - dest[2]);
163	if (!retval && src[2])
164	retval = (src[3] - dest[3]);
165	}
166	}
167	return retval;
168	case 5: retval = (src[0] - dest[0]);
169	if(!retval && src[0]) {
170	retval = (src[1] - dest[1]);
171	if(!retval && src[1]) {
172	retval = (src[2] - dest[2]);
173	if (!retval && src[2]) {
174	retval = (src[3] - dest[3]);
175	if (!retval && src[3])
176	retval = (src[4] - dest[4]);
177	}
178	}
179	}
180	return retval;
181	default:
182	retval = (src[0] - dest[0]);
183	if(!retval && src[0]) {
184	retval = (src[1] - dest[1]);
185	if(!retval && src[1]) {
186	retval = (src[2] - dest[2]);
187	if(!retval && src[2])
188	retval = __strncmp(src+3,dest+3,count-3);
189	}
190	}
191	return retval;
192	}
193	}
194
195	#undef strncmp
196	#define strncmp(__arg0, __arg1, __arg2) \
197	(__builtin_constant_p(__arg2) ? \
198	__constant_strncmp(__arg0, __arg1, __arg2) : \
199	__strncmp(__arg0, __arg1, __arg2))
200
201	#endif /* !EXPORT_SYMTAB_STROPS */
202
203	#endif /* __KERNEL__ */
204
205	#endif /* !(__SPARC_STRING_H__) */