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140 lines
3.3 KiB
140 lines
3.3 KiB
/* |
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* include/asm-xtensa/string.h |
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* |
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* These trivial string functions are considered part of the public domain. |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 2001 - 2005 Tensilica Inc. |
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*/ |
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/* We should optimize these. See arch/xtensa/lib/strncpy_user.S */ |
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#ifndef _XTENSA_STRING_H |
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#define _XTENSA_STRING_H |
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#define __HAVE_ARCH_STRCPY |
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static inline char *strcpy(char *__dest, const char *__src) |
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{ |
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register char *__xdest = __dest; |
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unsigned long __dummy; |
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__asm__ __volatile__("1:\n\t" |
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"l8ui %2, %1, 0\n\t" |
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"s8i %2, %0, 0\n\t" |
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"addi %1, %1, 1\n\t" |
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"addi %0, %0, 1\n\t" |
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"bnez %2, 1b\n\t" |
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: "=r" (__dest), "=r" (__src), "=&r" (__dummy) |
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: "0" (__dest), "1" (__src) |
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: "memory"); |
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return __xdest; |
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} |
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#define __HAVE_ARCH_STRNCPY |
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static inline char *strncpy(char *__dest, const char *__src, size_t __n) |
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{ |
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register char *__xdest = __dest; |
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unsigned long __dummy; |
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if (__n == 0) |
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return __xdest; |
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__asm__ __volatile__( |
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"1:\n\t" |
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"l8ui %2, %1, 0\n\t" |
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"s8i %2, %0, 0\n\t" |
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"addi %1, %1, 1\n\t" |
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"addi %0, %0, 1\n\t" |
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"beqz %2, 2f\n\t" |
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"bne %1, %5, 1b\n" |
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"2:" |
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: "=r" (__dest), "=r" (__src), "=&r" (__dummy) |
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: "0" (__dest), "1" (__src), "r" ((uintptr_t)__src+__n) |
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: "memory"); |
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return __xdest; |
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} |
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#define __HAVE_ARCH_STRCMP |
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static inline int strcmp(const char *__cs, const char *__ct) |
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{ |
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register int __res; |
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unsigned long __dummy; |
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__asm__ __volatile__( |
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"1:\n\t" |
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"l8ui %3, %1, 0\n\t" |
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"addi %1, %1, 1\n\t" |
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"l8ui %2, %0, 0\n\t" |
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"addi %0, %0, 1\n\t" |
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"beqz %2, 2f\n\t" |
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"beq %2, %3, 1b\n" |
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"2:\n\t" |
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"sub %2, %2, %3" |
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: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) |
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: "0" (__cs), "1" (__ct)); |
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return __res; |
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} |
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#define __HAVE_ARCH_STRNCMP |
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static inline int strncmp(const char *__cs, const char *__ct, size_t __n) |
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{ |
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register int __res; |
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unsigned long __dummy; |
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__asm__ __volatile__( |
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"mov %2, %3\n" |
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"1:\n\t" |
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"beq %0, %6, 2f\n\t" |
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"l8ui %3, %1, 0\n\t" |
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"addi %1, %1, 1\n\t" |
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"l8ui %2, %0, 0\n\t" |
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"addi %0, %0, 1\n\t" |
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"beqz %2, 2f\n\t" |
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"beqz %3, 2f\n\t" |
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"beq %2, %3, 1b\n" |
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"2:\n\t" |
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"sub %2, %2, %3" |
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: "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) |
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: "0" (__cs), "1" (__ct), "r" ((uintptr_t)__cs+__n)); |
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return __res; |
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} |
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#define __HAVE_ARCH_MEMSET |
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extern void *memset(void *__s, int __c, size_t __count); |
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extern void *__memset(void *__s, int __c, size_t __count); |
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#define __HAVE_ARCH_MEMCPY |
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extern void *memcpy(void *__to, __const__ void *__from, size_t __n); |
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extern void *__memcpy(void *__to, __const__ void *__from, size_t __n); |
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#define __HAVE_ARCH_MEMMOVE |
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extern void *memmove(void *__dest, __const__ void *__src, size_t __n); |
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extern void *__memmove(void *__dest, __const__ void *__src, size_t __n); |
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/* Don't build bcopy at all ... */ |
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#define __HAVE_ARCH_BCOPY |
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#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) |
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/* |
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* For files that are not instrumented (e.g. mm/slub.c) we |
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* should use not instrumented version of mem* functions. |
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*/ |
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#define memcpy(dst, src, len) __memcpy(dst, src, len) |
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#define memmove(dst, src, len) __memmove(dst, src, len) |
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#define memset(s, c, n) __memset(s, c, n) |
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#ifndef __NO_FORTIFY |
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#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */ |
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#endif |
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#endif |
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#endif /* _XTENSA_STRING_H */
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