/* $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__) */