[linux-2.6-block.git] / arch / s390 / include / asm / string.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  S390 version
 *    Copyright IBM Corp. 1999
 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
 */

#ifndef _S390_STRING_H_
#define _S390_STRING_H_

#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_MEMMOVE	/* 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 void *memmove(void *, const void *, 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_STRCHR
#undef __HAVE_ARCH_STRNCHR
#undef __HAVE_ARCH_STRNCMP
#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", "memory");
	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", "memory");
	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)
{
	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;
}

static inline size_t strlen(const char *s)
{
	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", "memory");
	return r0 - (unsigned long) s;
}

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", "memory");
	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 /* __S390_STRING_H_ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	/*
1da177e4	3	* S390 version
a53c8fab	4	* Copyright IBM Corp. 1999
1da177e4 LT	5	* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
	6	*/
	7
	8	#ifndef _S390_STRING_H_
	9	#define _S390_STRING_H_
	10
1da177e4 LT	11	#ifndef _LINUX_TYPES_H
	12	#include <linux/types.h>
	13	#endif
	14
	15	#define __HAVE_ARCH_MEMCHR /* inline & arch function */
	16	#define __HAVE_ARCH_MEMCMP /* arch function */
	17	#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
b4623d4e	18	#define __HAVE_ARCH_MEMMOVE /* gcc builtin & arch function */
1da177e4 LT	19	#define __HAVE_ARCH_MEMSCAN /* inline & arch function */
	20	#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
	21	#define __HAVE_ARCH_STRCAT /* inline & arch function */
	22	#define __HAVE_ARCH_STRCMP /* arch function */
	23	#define __HAVE_ARCH_STRCPY /* inline & arch function */
	24	#define __HAVE_ARCH_STRLCAT /* arch function */
	25	#define __HAVE_ARCH_STRLCPY /* arch function */
	26	#define __HAVE_ARCH_STRLEN /* inline & arch function */
	27	#define __HAVE_ARCH_STRNCAT /* arch function */
	28	#define __HAVE_ARCH_STRNCPY /* arch function */
	29	#define __HAVE_ARCH_STRNLEN /* inline & arch function */
	30	#define __HAVE_ARCH_STRRCHR /* arch function */
	31	#define __HAVE_ARCH_STRSTR /* arch function */
	32
	33	/* Prototypes for non-inlined arch strings functions. */
	34	extern int memcmp(const void , const void , size_t);
	35	extern void memcpy(void , const void *, size_t);
	36	extern void memset(void , int, size_t);
b4623d4e	37	extern void memmove(void , const void *, size_t);
1da177e4 LT	38	extern int strcmp(const char ,const char );
	39	extern size_t strlcat(char , const char , size_t);
	40	extern size_t strlcpy(char , const char , size_t);
	41	extern char strncat(char , const char *, size_t);
	42	extern char strncpy(char , const char *, size_t);
	43	extern char strrchr(const char , int);
	44	extern char strstr(const char , const char *);
	45
1da177e4 LT	46	#undef __HAVE_ARCH_STRCHR
	47	#undef __HAVE_ARCH_STRNCHR
	48	#undef __HAVE_ARCH_STRNCMP
1da177e4 LT	49	#undef __HAVE_ARCH_STRPBRK
	50	#undef __HAVE_ARCH_STRSEP
	51	#undef __HAVE_ARCH_STRSPN
	52
	53	#if !defined(IN_ARCH_STRING_C)
	54
	55	static inline void memchr(const void s, int c, size_t n)
	56	{
	57	register int r0 asm("0") = (char) c;
	58	const void *ret = s + n;
	59
94c12cc7 MS	60	asm volatile(
	61	"0: srst %0,%1\n"
	62	" jo 0b\n"
	63	" jl 1f\n"
	64	" la %0,0\n"
	65	"1:"
7a71fd1c	66	: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
1da177e4 LT	67	return (void *) ret;
	68	}
	69
	70	static inline void memscan(void s, int c, size_t n)
	71	{
	72	register int r0 asm("0") = (char) c;
	73	const void *ret = s + n;
	74
94c12cc7 MS	75	asm volatile(
	76	"0: srst %0,%1\n"
	77	" jo 0b\n"
7a71fd1c	78	: "+a" (ret), "+&a" (s) : "d" (r0) : "cc", "memory");
1da177e4 LT	79	return (void *) ret;
	80	}
	81
	82	static inline char strcat(char dst, const char *src)
	83	{
	84	register int r0 asm("0") = 0;
	85	unsigned long dummy;
	86	char *ret = dst;
	87
94c12cc7 MS	88	asm volatile(
	89	"0: srst %0,%1\n"
	90	" jo 0b\n"
	91	"1: mvst %0,%2\n"
	92	" jo 1b"
	93	: "=&a" (dummy), "+a" (dst), "+a" (src)
	94	: "d" (r0), "0" (0) : "cc", "memory" );
1da177e4 LT	95	return ret;
	96	}
	97
	98	static inline char strcpy(char dst, const char *src)
	99	{
	100	register int r0 asm("0") = 0;
	101	char *ret = dst;
	102
94c12cc7 MS	103	asm volatile(
	104	"0: mvst %0,%1\n"
	105	" jo 0b"
	106	: "+&a" (dst), "+&a" (src) : "d" (r0)
	107	: "cc", "memory");
1da177e4 LT	108	return ret;
	109	}
	110
	111	static inline size_t strlen(const char *s)
	112	{
	113	register unsigned long r0 asm("0") = 0;
	114	const char *tmp = s;
	115
94c12cc7 MS	116	asm volatile(
	117	"0: srst %0,%1\n"
	118	" jo 0b"
7a71fd1c	119	: "+d" (r0), "+a" (tmp) : : "cc", "memory");
1da177e4 LT	120	return r0 - (unsigned long) s;
	121	}
	122
	123	static inline size_t strnlen(const char * s, size_t n)
	124	{
	125	register int r0 asm("0") = 0;
	126	const char *tmp = s;
	127	const char *end = s + n;
	128
94c12cc7 MS	129	asm volatile(
	130	"0: srst %0,%1\n"
	131	" jo 0b"
7a71fd1c	132	: "+a" (end), "+a" (tmp) : "d" (r0) : "cc", "memory");
1da177e4 LT	133	return end - s;
1da177e4 LT	134	}
6faf2507 RR	135	#else /* IN_ARCH_STRING_C */
	136	void memchr(const void s, int c, size_t n);
	137	void memscan(void s, int c, size_t n);
	138	char strcat(char dst, const char *src);
	139	char strcpy(char dst, const char *src);
	140	size_t strlen(const char *s);
	141	size_t strnlen(const char * s, size_t n);
1da177e4 LT	142	#endif /* !IN_ARCH_STRING_C */
1da177e4 LT	143
1da177e4	144	#endif /* __S390_STRING_H_ */