1edad85b16
Use builtin variants if gcc 4 or newer is used to compile the kernel. Generates better code than the asm variants. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
/*
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* include/asm-s390/string.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
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*/
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#ifndef _S390_STRING_H_
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#define _S390_STRING_H_
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#ifdef __KERNEL__
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#ifndef _LINUX_TYPES_H
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#include <linux/types.h>
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#endif
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#define __HAVE_ARCH_MEMCHR /* inline & arch function */
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#define __HAVE_ARCH_MEMCMP /* arch function */
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#define __HAVE_ARCH_MEMCPY /* gcc builtin & arch function */
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#define __HAVE_ARCH_MEMSCAN /* inline & arch function */
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#define __HAVE_ARCH_MEMSET /* gcc builtin & arch function */
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#define __HAVE_ARCH_STRCAT /* inline & arch function */
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#define __HAVE_ARCH_STRCMP /* arch function */
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#define __HAVE_ARCH_STRCPY /* inline & arch function */
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#define __HAVE_ARCH_STRLCAT /* arch function */
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#define __HAVE_ARCH_STRLCPY /* arch function */
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#define __HAVE_ARCH_STRLEN /* inline & arch function */
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#define __HAVE_ARCH_STRNCAT /* arch function */
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#define __HAVE_ARCH_STRNCPY /* arch function */
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#define __HAVE_ARCH_STRNLEN /* inline & arch function */
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#define __HAVE_ARCH_STRRCHR /* arch function */
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#define __HAVE_ARCH_STRSTR /* arch function */
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/* Prototypes for non-inlined arch strings functions. */
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extern int memcmp(const void *, const void *, size_t);
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extern void *memcpy(void *, const void *, size_t);
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extern void *memset(void *, int, size_t);
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extern int strcmp(const char *,const char *);
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extern size_t strlcat(char *, const char *, size_t);
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extern size_t strlcpy(char *, const char *, size_t);
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extern char *strncat(char *, const char *, size_t);
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extern char *strncpy(char *, const char *, size_t);
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extern char *strrchr(const char *, int);
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extern char *strstr(const char *, const char *);
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#undef __HAVE_ARCH_MEMMOVE
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#undef __HAVE_ARCH_STRCHR
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#undef __HAVE_ARCH_STRNCHR
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#undef __HAVE_ARCH_STRNCMP
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#undef __HAVE_ARCH_STRNICMP
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#undef __HAVE_ARCH_STRPBRK
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#undef __HAVE_ARCH_STRSEP
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#undef __HAVE_ARCH_STRSPN
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#if !defined(IN_ARCH_STRING_C)
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static inline void *memchr(const void * s, int c, size_t n)
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{
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register int r0 asm("0") = (char) c;
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const void *ret = s + n;
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asm volatile(
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"0: srst %0,%1\n"
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" jo 0b\n"
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" jl 1f\n"
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" la %0,0\n"
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"1:"
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: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
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return (void *) ret;
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}
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static inline void *memscan(void *s, int c, size_t n)
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{
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register int r0 asm("0") = (char) c;
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const void *ret = s + n;
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asm volatile(
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"0: srst %0,%1\n"
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" jo 0b\n"
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: "+a" (ret), "+&a" (s) : "d" (r0) : "cc");
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return (void *) ret;
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}
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static inline char *strcat(char *dst, const char *src)
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{
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register int r0 asm("0") = 0;
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unsigned long dummy;
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char *ret = dst;
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asm volatile(
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"0: srst %0,%1\n"
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" jo 0b\n"
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"1: mvst %0,%2\n"
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" jo 1b"
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: "=&a" (dummy), "+a" (dst), "+a" (src)
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: "d" (r0), "0" (0) : "cc", "memory" );
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return ret;
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}
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static inline char *strcpy(char *dst, const char *src)
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{
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#if __GNUC__ < 4
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register int r0 asm("0") = 0;
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char *ret = dst;
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asm volatile(
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"0: mvst %0,%1\n"
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" jo 0b"
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: "+&a" (dst), "+&a" (src) : "d" (r0)
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: "cc", "memory");
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return ret;
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#else
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return __builtin_strcpy(dst, src);
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#endif
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}
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static inline size_t strlen(const char *s)
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{
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#if __GNUC__ < 4
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register unsigned long r0 asm("0") = 0;
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const char *tmp = s;
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asm volatile(
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"0: srst %0,%1\n"
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" jo 0b"
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: "+d" (r0), "+a" (tmp) : : "cc");
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return r0 - (unsigned long) s;
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#else
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return __builtin_strlen(s);
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#endif
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}
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static inline size_t strnlen(const char * s, size_t n)
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{
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register int r0 asm("0") = 0;
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const char *tmp = s;
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const char *end = s + n;
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asm volatile(
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"0: srst %0,%1\n"
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" jo 0b"
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: "+a" (end), "+a" (tmp) : "d" (r0) : "cc");
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return end - s;
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}
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#else /* IN_ARCH_STRING_C */
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void *memchr(const void * s, int c, size_t n);
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void *memscan(void *s, int c, size_t n);
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char *strcat(char *dst, const char *src);
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char *strcpy(char *dst, const char *src);
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size_t strlen(const char *s);
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size_t strnlen(const char * s, size_t n);
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#endif /* !IN_ARCH_STRING_C */
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#endif /* __KERNEL__ */
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#endif /* __S390_STRING_H_ */
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