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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /* * include/asm-xtensa/string.h * * These trivial string functions are considered part of the public domain. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. */ /* We should optimize these. See arch/xtensa/lib/strncpy_user.S */ #ifndef _XTENSA_STRING_H #define _XTENSA_STRING_H #define __HAVE_ARCH_STRCPY static inline char *strcpy(char *__dest, const char *__src) { register char *__xdest = __dest; unsigned long __dummy; __asm__ __volatile__("1:\n\t" "l8ui %2, %1, 0\n\t" "s8i %2, %0, 0\n\t" "addi %1, %1, 1\n\t" "addi %0, %0, 1\n\t" "bnez %2, 1b\n\t" : "=r" (__dest), "=r" (__src), "=&r" (__dummy) : "0" (__dest), "1" (__src) : "memory"); return __xdest; } #define __HAVE_ARCH_STRNCPY static inline char *strncpy(char *__dest, const char *__src, size_t __n) { register char *__xdest = __dest; unsigned long __dummy; if (__n == 0) return __xdest; __asm__ __volatile__( "1:\n\t" "l8ui %2, %1, 0\n\t" "s8i %2, %0, 0\n\t" "addi %1, %1, 1\n\t" "addi %0, %0, 1\n\t" "beqz %2, 2f\n\t" "bne %1, %5, 1b\n" "2:" : "=r" (__dest), "=r" (__src), "=&r" (__dummy) : "0" (__dest), "1" (__src), "r" (__src+__n) : "memory"); return __xdest; } #define __HAVE_ARCH_STRCMP static inline int strcmp(const char *__cs, const char *__ct) { register int __res; unsigned long __dummy; __asm__ __volatile__( "1:\n\t" "l8ui %3, %1, 0\n\t" "addi %1, %1, 1\n\t" "l8ui %2, %0, 0\n\t" "addi %0, %0, 1\n\t" "beqz %2, 2f\n\t" "beq %2, %3, 1b\n" "2:\n\t" "sub %2, %2, %3" : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) : "0" (__cs), "1" (__ct)); return __res; } #define __HAVE_ARCH_STRNCMP static inline int strncmp(const char *__cs, const char *__ct, size_t __n) { register int __res; unsigned long __dummy; __asm__ __volatile__( "mov %2, %3\n" "1:\n\t" "beq %0, %6, 2f\n\t" "l8ui %3, %1, 0\n\t" "addi %1, %1, 1\n\t" "l8ui %2, %0, 0\n\t" "addi %0, %0, 1\n\t" "beqz %2, 2f\n\t" "beqz %3, 2f\n\t" "beq %2, %3, 1b\n" "2:\n\t" "sub %2, %2, %3" : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) : "0" (__cs), "1" (__ct), "r" (__cs+__n)); return __res; } #define __HAVE_ARCH_MEMSET extern void *memset(void *__s, int __c, size_t __count); #define __HAVE_ARCH_MEMCPY extern void *memcpy(void *__to, __const__ void *__from, size_t __n); #define __HAVE_ARCH_MEMMOVE extern void *memmove(void *__dest, __const__ void *__src, size_t __n); /* Don't build bcopy at all ... */ #define __HAVE_ARCH_BCOPY #endif /* _XTENSA_STRING_H */ |