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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [include/] [asm-sparc/] [string.h] - Blame information for rev 1780

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1 1275 phoenix 
/* $Id: string.h,v 1.1.1.1 2004-04-15 02:40:38 phoenix Exp $
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 * string.h: External definitions for optimized assembly string
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 *           routines for the Linux Kernel.
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 *
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 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
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 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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 */
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#ifndef __SPARC_STRING_H__
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#define __SPARC_STRING_H__
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#include <asm/page.h>
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/* Really, userland/ksyms should not see any of this stuff. */
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#ifdef __KERNEL__
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extern void __memmove(void *,const void *,__kernel_size_t);
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extern __kernel_size_t __memcpy(void *,const void *,__kernel_size_t);
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extern __kernel_size_t __memset(void *,int,__kernel_size_t);
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#ifndef EXPORT_SYMTAB_STROPS
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/* First the mem*() things. */
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#define __HAVE_ARCH_BCOPY
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#define __HAVE_ARCH_MEMMOVE
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#undef memmove
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#define memmove(_to, _from, _n) \
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({ \
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        void *_t = (_to); \
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        __memmove(_t, (_from), (_n)); \
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        _t; \
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})
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#define __HAVE_ARCH_MEMCPY
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static inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
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{
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        extern void __copy_1page(void *, const void *);
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        if(n <= 32) {
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                __builtin_memcpy(to, from, n);
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        } else {
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                switch(n) {
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                case PAGE_SIZE:
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                        __copy_1page(to, from);
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                        break;
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                default:
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                        __memcpy(to, from, n);
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                        break;
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                }
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        }
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        return to;
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}
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static inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
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{
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        __memcpy(to, from, n);
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        return to;
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}
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#undef memcpy
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#define memcpy(t, f, n) \
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(__builtin_constant_p(n) ? \
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 __constant_memcpy((t),(f),(n)) : \
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 __nonconstant_memcpy((t),(f),(n)))
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#define __HAVE_ARCH_MEMSET
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static inline void *__constant_c_and_count_memset(void *s, char c, __kernel_size_t count)
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{
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        extern void bzero_1page(void *);
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        extern __kernel_size_t __bzero(void *, __kernel_size_t);
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        if(!c) {
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                if(count == PAGE_SIZE)
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                        bzero_1page(s);
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                else
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                        __bzero(s, count);
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        } else {
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                __memset(s, c, count);
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        }
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        return s;
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}
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static inline void *__constant_c_memset(void *s, char c, __kernel_size_t count)
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{
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        extern __kernel_size_t __bzero(void *, __kernel_size_t);
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        if(!c)
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                __bzero(s, count);
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        else
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                __memset(s, c, count);
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        return s;
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}
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static inline void *__nonconstant_memset(void *s, char c, __kernel_size_t count)
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{
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        __memset(s, c, count);
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        return s;
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}
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#undef memset
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#define memset(s, c, count) \
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(__builtin_constant_p(c) ? (__builtin_constant_p(count) ? \
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                            __constant_c_and_count_memset((s), (c), (count)) : \
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                            __constant_c_memset((s), (c), (count))) \
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                          : __nonconstant_memset((s), (c), (count)))
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#define __HAVE_ARCH_MEMSCAN
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#undef memscan
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#define memscan(__arg0, __char, __arg2)                                         \
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({                                                                              \
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        extern void *__memscan_zero(void *, size_t);                            \
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        extern void *__memscan_generic(void *, int, size_t);                    \
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        void *__retval, *__addr = (__arg0);                                     \
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        size_t __size = (__arg2);                                               \
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                                                                                \
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        if(__builtin_constant_p(__char) && !(__char))                           \
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                __retval = __memscan_zero(__addr, __size);                      \
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        else                                                                    \
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                __retval = __memscan_generic(__addr, (__char), __size);         \
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                                                                                \
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        __retval;                                                               \
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})
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#define __HAVE_ARCH_MEMCMP
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extern int memcmp(const void *,const void *,__kernel_size_t);
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/* Now the str*() stuff... */
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#define __HAVE_ARCH_STRLEN
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extern __kernel_size_t strlen(const char *);
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#define __HAVE_ARCH_STRNCMP
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extern int __strncmp(const char *, const char *, __kernel_size_t);
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static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
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{
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        register int retval;
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        switch(count) {
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        case 0: return 0;
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        case 1: return (src[0] - dest[0]);
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        case 2: retval = (src[0] - dest[0]);
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                if(!retval && src[0])
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                  retval = (src[1] - dest[1]);
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                return retval;
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        case 3: retval = (src[0] - dest[0]);
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                if(!retval && src[0]) {
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                  retval = (src[1] - dest[1]);
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                  if(!retval && src[1])
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                    retval = (src[2] - dest[2]);
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                }
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                return retval;
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        case 4: retval = (src[0] - dest[0]);
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                if(!retval && src[0]) {
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                  retval = (src[1] - dest[1]);
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                  if(!retval && src[1]) {
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                    retval = (src[2] - dest[2]);
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                    if (!retval && src[2])
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                      retval = (src[3] - dest[3]);
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                  }
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                }
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                return retval;
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        case 5: retval = (src[0] - dest[0]);
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                if(!retval && src[0]) {
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                  retval = (src[1] - dest[1]);
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                  if(!retval && src[1]) {
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                    retval = (src[2] - dest[2]);
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                    if (!retval && src[2]) {
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                      retval = (src[3] - dest[3]);
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                      if (!retval && src[3])
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                        retval = (src[4] - dest[4]);
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                    }
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                  }
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                }
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                return retval;
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        default:
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                retval = (src[0] - dest[0]);
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                if(!retval && src[0]) {
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                  retval = (src[1] - dest[1]);
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                  if(!retval && src[1]) {
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                    retval = (src[2] - dest[2]);
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                    if(!retval && src[2])
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                      retval = __strncmp(src+3,dest+3,count-3);
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                  }
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                }
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                return retval;
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        }
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}
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#undef strncmp
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#define strncmp(__arg0, __arg1, __arg2) \
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(__builtin_constant_p(__arg2) ? \
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 __constant_strncmp(__arg0, __arg1, __arg2) : \
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 __strncmp(__arg0, __arg1, __arg2))
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#endif /* !EXPORT_SYMTAB_STROPS */
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#endif /* __KERNEL__ */
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#endif /* !(__SPARC_STRING_H__) */

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