[deliverable/linux.git] / arch / s390 / include / asm / string.h

/*
 *  include/asm-s390/string.h
 *
 *  S390 version
 *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
 */

#ifndef _S390_STRING_H_
#define _S390_STRING_H_

#ifdef __KERNEL__

#ifndef _LINUX_TYPES_H
#include <linux/types.h>
#endif

#define __HAVE_ARCH_MEMCHR	/* inline & arch function */
#define __HAVE_ARCH_MEMCMP	/* arch function */
#define __HAVE_ARCH_MEMCPY	/* gcc builtin & arch function */
#define __HAVE_ARCH_MEMSCAN	/* inline & arch function */
#define __HAVE_ARCH_MEMSET	/* gcc builtin & arch function */
#define __HAVE_ARCH_STRCAT	/* inline & arch function */
#define __HAVE_ARCH_STRCMP	/* arch function */
#define __HAVE_ARCH_STRCPY	/* inline & arch function */
#define __HAVE_ARCH_STRLCAT	/* arch function */
#define __HAVE_ARCH_STRLCPY	/* arch function */
#define __HAVE_ARCH_STRLEN	/* inline & arch function */
#define __HAVE_ARCH_STRNCAT	/* arch function */
#define __HAVE_ARCH_STRNCPY	/* arch function */
#define __HAVE_ARCH_STRNLEN	/* inline & arch function */
#define __HAVE_ARCH_STRRCHR	/* arch function */
#define __HAVE_ARCH_STRSTR	/* arch function */

/* Prototypes for non-inlined arch strings functions. */
extern int memcmp(const void *, const void *, size_t);
extern void *memcpy(void *, const void *, size_t);
extern void *memset(void *, int, size_t);
extern int strcmp(const char *,const char *);
extern size_t strlcat(char *, const char *, size_t);
extern size_t strlcpy(char *, const char *, size_t);
extern char *strncat(char *, const char *, size_t);
extern char *strncpy(char *, const char *, size_t);
extern char *strrchr(const char *, int);
extern char *strstr(const char *, const char *);

#undef __HAVE_ARCH_MEMMOVE
#undef __HAVE_ARCH_STRCHR
#undef __HAVE_ARCH_STRNCHR
#undef __HAVE_ARCH_STRNCMP
#undef __HAVE_ARCH_STRNICMP
#undef __HAVE_ARCH_STRPBRK
#undef __HAVE_ARCH_STRSEP
#undef __HAVE_ARCH_STRSPN

#if !defined(IN_ARCH_STRING_C)

static inline void *memchr(const void * s, int c, size_t n)
{
	register int r0 asm("0") = (char) c;
	const void *ret = s + n;

	asm volatile(
		"0:	srst	%0,%1\n"
		"	jo	0b\n"
		"	jl	1f\n"
		"	la	%0,0\n"
		"1:"
		: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
	return (void *) ret;
}

static inline void *memscan(void *s, int c, size_t n)
{
	register int r0 asm("0") = (char) c;
	const void *ret = s + n;

	asm volatile(
		"0:	srst	%0,%1\n"
		"	jo	0b\n"
		: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
	return (void *) ret;
}

static inline char *strcat(char *dst, const char *src)
{
	register int r0 asm("0") = 0;
	unsigned long dummy;
	char *ret = dst;

	asm volatile(
		"0:	srst	%0,%1\n"
		"	jo	0b\n"
		"1:	mvst	%0,%2\n"
		"	jo	1b"
		: "=&a" (dummy), "+a" (dst), "+a" (src)
		: "d" (r0), "0" (0) : "cc", "memory" );
	return ret;
}

static inline char *strcpy(char *dst, const char *src)
{
#if __GNUC__ < 4
	register int r0 asm("0") = 0;
	char *ret = dst;

	asm volatile(
		"0:	mvst	%0,%1\n"
		"	jo	0b"
		: "+&a" (dst), "+&a" (src) : "d" (r0)
		: "cc", "memory");
	return ret;
#else
	return __builtin_strcpy(dst, src);
#endif
}

static inline size_t strlen(const char *s)
{
#if __GNUC__ < 4
	register unsigned long r0 asm("0") = 0;
	const char *tmp = s;

	asm volatile(
		"0:	srst	%0,%1\n"
		"	jo	0b"
		: "+d" (r0), "+a" (tmp) :  : "cc");
	return r0 - (unsigned long) s;
#else
	return __builtin_strlen(s);
#endif
}

static inline size_t strnlen(const char * s, size_t n)
{
	register int r0 asm("0") = 0;
	const char *tmp = s;
	const char *end = s + n;

	asm volatile(
		"0:	srst	%0,%1\n"
		"	jo	0b"
		: "+a" (end), "+a" (tmp) : "d" (r0)  : "cc");
	return end - s;
}
#else /* IN_ARCH_STRING_C */
void *memchr(const void * s, int c, size_t n);
void *memscan(void *s, int c, size_t n);
char *strcat(char *dst, const char *src);
char *strcpy(char *dst, const char *src);
size_t strlen(const char *s);
size_t strnlen(const char * s, size_t n);
#endif /* !IN_ARCH_STRING_C */

#endif /* __KERNEL__ */

#endif /* __S390_STRING_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-s390/string.h
	3	*
	4	* S390 version
	5	* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
	6	* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
	7	*/
	8
	9	#ifndef _S390_STRING_H_
	10	#define _S390_STRING_H_
	11
	12	#ifdef __KERNEL__
	13
	14	#ifndef _LINUX_TYPES_H
	15	#include <linux/types.h>
	16	#endif
	17
	18	#define __HAVE_ARCH_MEMCHR /* inline & arch function */
	19	#define __HAVE_ARCH_MEMCMP /* arch function */
	20	#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
	21	#define __HAVE_ARCH_MEMSCAN /* inline & arch function */
	22	#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
	23	#define __HAVE_ARCH_STRCAT /* inline & arch function */
	24	#define __HAVE_ARCH_STRCMP /* arch function */
	25	#define __HAVE_ARCH_STRCPY /* inline & arch function */
	26	#define __HAVE_ARCH_STRLCAT /* arch function */
	27	#define __HAVE_ARCH_STRLCPY /* arch function */
	28	#define __HAVE_ARCH_STRLEN /* inline & arch function */
	29	#define __HAVE_ARCH_STRNCAT /* arch function */
	30	#define __HAVE_ARCH_STRNCPY /* arch function */
	31	#define __HAVE_ARCH_STRNLEN /* inline & arch function */
	32	#define __HAVE_ARCH_STRRCHR /* arch function */
	33	#define __HAVE_ARCH_STRSTR /* arch function */
	34
	35	/* Prototypes for non-inlined arch strings functions. */
	36	extern int memcmp(const void , const void , size_t);
	37	extern void memcpy(void , const void *, size_t);
	38	extern void memset(void , int, size_t);
	39	extern int strcmp(const char ,const char );
	40	extern size_t strlcat(char , const char , size_t);
	41	extern size_t strlcpy(char , const char , size_t);
	42	extern char strncat(char , const char *, size_t);
	43	extern char strncpy(char , const char *, size_t);
	44	extern char strrchr(const char , int);
	45	extern char strstr(const char , const char *);
	46
	47	#undef __HAVE_ARCH_MEMMOVE
	48	#undef __HAVE_ARCH_STRCHR
	49	#undef __HAVE_ARCH_STRNCHR
	50	#undef __HAVE_ARCH_STRNCMP
	51	#undef __HAVE_ARCH_STRNICMP
	52	#undef __HAVE_ARCH_STRPBRK
	53	#undef __HAVE_ARCH_STRSEP
	54	#undef __HAVE_ARCH_STRSPN
	55
	56	#if !defined(IN_ARCH_STRING_C)
	57
	58	static inline void memchr(const void s, int c, size_t n)
	59	{
	60	register int r0 asm("0") = (char) c;
	61	const void *ret = s + n;
	62
94c12cc7 MS	63	asm volatile(
	64	"0: srst %0,%1\n"
	65	" jo 0b\n"
	66	" jl 1f\n"
	67	" la %0,0\n"
	68	"1:"
	69	: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
1da177e4 LT	70	return (void *) ret;
	71	}
	72
	73	static inline void memscan(void s, int c, size_t n)
	74	{
	75	register int r0 asm("0") = (char) c;
	76	const void *ret = s + n;
	77
94c12cc7 MS	78	asm volatile(
	79	"0: srst %0,%1\n"
	80	" jo 0b\n"
	81	: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
1da177e4 LT	82	return (void *) ret;
	83	}
	84
	85	static inline char strcat(char dst, const char *src)
	86	{
	87	register int r0 asm("0") = 0;
	88	unsigned long dummy;
	89	char *ret = dst;
	90
94c12cc7 MS	91	asm volatile(
	92	"0: srst %0,%1\n"
	93	" jo 0b\n"
	94	"1: mvst %0,%2\n"
	95	" jo 1b"
	96	: "=&a" (dummy), "+a" (dst), "+a" (src)
	97	: "d" (r0), "0" (0) : "cc", "memory" );
1da177e4 LT	98	return ret;
	99	}
	100
	101	static inline char strcpy(char dst, const char *src)
	102	{
1edad85b	103	#if __GNUC__ < 4
1da177e4 LT	104	register int r0 asm("0") = 0;
	105	char *ret = dst;
	106
94c12cc7 MS	107	asm volatile(
	108	"0: mvst %0,%1\n"
	109	" jo 0b"
	110	: "+&a" (dst), "+&a" (src) : "d" (r0)
	111	: "cc", "memory");
1da177e4	112	return ret;
1edad85b HC	113	#else
	114	return __builtin_strcpy(dst, src);
	115	#endif
1da177e4 LT	116	}
	117
	118	static inline size_t strlen(const char *s)
	119	{
1edad85b	120	#if __GNUC__ < 4
1da177e4 LT	121	register unsigned long r0 asm("0") = 0;
	122	const char *tmp = s;
	123
94c12cc7 MS	124	asm volatile(
	125	"0: srst %0,%1\n"
	126	" jo 0b"
	127	: "+d" (r0), "+a" (tmp) : : "cc");
1da177e4	128	return r0 - (unsigned long) s;
1edad85b HC	129	#else
	130	return __builtin_strlen(s);
	131	#endif
1da177e4 LT	132	}
	133
	134	static inline size_t strnlen(const char * s, size_t n)
	135	{
	136	register int r0 asm("0") = 0;
	137	const char *tmp = s;
	138	const char *end = s + n;
	139
94c12cc7 MS	140	asm volatile(
	141	"0: srst %0,%1\n"
	142	" jo 0b"
	143	: "+a" (end), "+a" (tmp) : "d" (r0) : "cc");
1da177e4 LT	144	return end - s;
1da177e4 LT	145	}
6faf2507 RR	146	#else /* IN_ARCH_STRING_C */
	147	void memchr(const void s, int c, size_t n);
	148	void memscan(void s, int c, size_t n);
	149	char strcat(char dst, const char *src);
	150	char strcpy(char dst, const char *src);
	151	size_t strlen(const char *s);
	152	size_t strnlen(const char * s, size_t n);
1da177e4 LT	153	#endif /* !IN_ARCH_STRING_C */
	154
	155	#endif /* __KERNEL__ */
	156
	157	#endif /* __S390_STRING_H_ */