| 1 | |
| 2 | * include/asm-xtensa/string.h
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| 3 | *
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| 4 | * These trivial string functions are considered part of the public domain.
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| 5 | *
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| 6 | * This file is subject to the terms and conditions of the GNU General Public
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| 7 | * License. See the file "COPYING" in the main directory of this archive
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| 8 | * for more details.
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| 9 | *
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| 10 | * Copyright (C) 2001 - 2005 Tensilica Inc.
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| 11 |
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| 12 |
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| 13 |
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| 14 |
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| 15 | #ifndef _XTENSA_STRING_H
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| 16 | #define _XTENSA_STRING_H
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| 17 |
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| 18 | #define __HAVE_ARCH_STRCPY
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| 19 | static inline char *strcpy(char *__dest, const char *__src)
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| 20 | {
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| 21 | register char *__xdest = __dest;
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| 22 | unsigned long __dummy;
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| 23 |
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| 24 | __asm__ __volatile__("1:\n\t"
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| 25 | "l8ui %2, %1, 0\n\t"
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| 26 | "s8i %2, %0, 0\n\t"
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| 27 | "addi %1, %1, 1\n\t"
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| 28 | "addi %0, %0, 1\n\t"
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| 29 | "bnez %2, 1b\n\t"
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| 30 | : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
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| 31 | : "0" (__dest), "1" (__src)
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| 32 | : "memory");
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| 33 |
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| 34 | return __xdest;
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| 35 | }
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| 36 |
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| 37 | #define __HAVE_ARCH_STRNCPY
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| 38 | static inline char *strncpy(char *__dest, const char *__src, size_t __n)
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| 39 | {
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| 40 | register char *__xdest = __dest;
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| 41 | unsigned long __dummy;
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| 42 |
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| 43 | if (__n == 0)
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| 44 | return __xdest;
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| 45 |
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| 46 | __asm__ __volatile__(
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| 47 | "1:\n\t"
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| 48 | "l8ui %2, %1, 0\n\t"
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| 49 | "s8i %2, %0, 0\n\t"
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| 50 | "addi %1, %1, 1\n\t"
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| 51 | "addi %0, %0, 1\n\t"
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| 52 | "beqz %2, 2f\n\t"
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| 53 | "bne %1, %5, 1b\n"
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| 54 | "2:"
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| 55 | : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
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| 56 | : "0" (__dest), "1" (__src), "r" (__src+__n)
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| 57 | : "memory");
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| 58 |
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| 59 | return __xdest;
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| 60 | }
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| 61 |
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| 62 | #define __HAVE_ARCH_STRCMP
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| 63 | static inline int strcmp(const char *__cs, const char *__ct)
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| 64 | {
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| 65 | register int __res;
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| 66 | unsigned long __dummy;
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| 67 |
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| 68 | __asm__ __volatile__(
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| 69 | "1:\n\t"
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| 70 | "l8ui %3, %1, 0\n\t"
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| 71 | "addi %1, %1, 1\n\t"
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| 72 | "l8ui %2, %0, 0\n\t"
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| 73 | "addi %0, %0, 1\n\t"
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| 74 | "beqz %2, 2f\n\t"
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| 75 | "beq %2, %3, 1b\n"
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| 76 | "2:\n\t"
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| 77 | "sub %2, %3, %2"
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| 78 | : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
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| 79 | : "0" (__cs), "1" (__ct));
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| 80 |
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| 81 | return __res;
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| 82 | }
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| 83 |
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| 84 | #define __HAVE_ARCH_STRNCMP
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| 85 | static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
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| 86 | {
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| 87 | register int __res;
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| 88 | unsigned long __dummy;
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| 89 |
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| 90 | __asm__ __volatile__(
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| 91 | "mov %2, %3\n"
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| 92 | "1:\n\t"
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| 93 | "beq %0, %6, 2f\n\t"
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| 94 | "l8ui %3, %1, 0\n\t"
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| 95 | "addi %1, %1, 1\n\t"
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| 96 | "l8ui %2, %0, 0\n\t"
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| 97 | "addi %0, %0, 1\n\t"
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| 98 | "beqz %2, 2f\n\t"
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| 99 | "beqz %3, 2f\n\t"
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| 100 | "beq %2, %3, 1b\n"
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| 101 | "2:\n\t"
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| 102 | "sub %2, %3, %2"
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| 103 | : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
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| 104 | : "0" (__cs), "1" (__ct), "r" (__cs+__n));
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| 105 |
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| 106 | return __res;
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| 107 | }
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| 108 |
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| 109 | #define __HAVE_ARCH_MEMSET
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| 110 | extern void *memset(void *__s, int __c, size_t __count);
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| 111 |
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| 112 | #define __HAVE_ARCH_MEMCPY
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| 113 | extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
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| 114 |
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| 115 | #define __HAVE_ARCH_MEMMOVE
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| 116 | extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
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| 117 |
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| 118 |
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| 119 | #define __HAVE_ARCH_BCOPY
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| 120 |
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| 121 | #define __HAVE_ARCH_MEMSCAN
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| 122 | #define memscan memchr
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| 123 |
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| 124 | #endif
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