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Diffstat (limited to 'newlib/libc/machine/microblaze/strlen.c')
| -rw-r--r-- | newlib/libc/machine/microblaze/strlen.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/newlib/libc/machine/microblaze/strlen.c b/newlib/libc/machine/microblaze/strlen.c deleted file mode 100644 index 82eede86e..000000000 --- a/newlib/libc/machine/microblaze/strlen.c +++ /dev/null @@ -1,153 +0,0 @@ -/* Copyright (c) 2009 Xilinx, Inc. All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are - met: - - 1. Redistributions source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - - 2. Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - 3. Neither the name of Xilinx nor the names of its contributors may be - used to endorse or promote products derived from this software without - specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS - IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A - PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED - TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - - -FUNCTION - <<strlen>>---character string length - -INDEX - strlen - -ANSI_SYNOPSIS - #include <string.h> - size_t strlen(const char *<[str]>); - -TRAD_SYNOPSIS - #include <string.h> - size_t strlen(<[str]>) - char *<[src]>; - -DESCRIPTION - The <<strlen>> function works out the length of the string - starting at <<*<[str]>>> by counting chararacters until it - reaches a <<NULL>> character. - -RETURNS - <<strlen>> returns the character count. - -PORTABILITY -<<strlen>> is ANSI C. - -<<strlen>> requires no supporting OS subroutines. - -QUICKREF - strlen ansi pure -*/ - -#include <_ansi.h> -#include <string.h> -#include <limits.h> - -#define LBLOCKSIZE (sizeof (long)) -#define UNALIGNED(X) ((long)X & (LBLOCKSIZE - 1)) - -#if LONG_MAX == 2147483647L -#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080) -#else -#if LONG_MAX == 9223372036854775807L -/* Nonzero if X (a long int) contains a NULL byte. */ -#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080) -#else -#error long int is not a 32bit or 64bit type. -#endif -#endif - -#ifndef DETECTNULL -#error long int is not a 32bit or 64bit byte -#endif - -size_t -_DEFUN (strlen, (str), - _CONST char *str) -{ - -#ifndef HAVE_HW_PCMP - -#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) - _CONST char *start = str; - - while (*str) - str++; - - return str - start; -#else - _CONST char *start = str; - unsigned long *aligned_addr; - - if (!UNALIGNED (str)) - { - /* If the string is word-aligned, we can check for the presence of - a null in each word-sized block. */ - aligned_addr = (unsigned long*)str; - while (!DETECTNULL (*aligned_addr)) - aligned_addr++; - - /* Once a null is detected, we check each byte in that block for a - precise position of the null. */ - str = (char*)aligned_addr; - } - - while (*str) - str++; - return str - start; -#endif /* not PREFER_SIZE_OVER_SPEED */ - -#else - - asm volatile (" \n\ - or r9, r0, r0 /* Index register */ \n\ -check_alignment: \n\ - andi r3, r5, 3 \n\ - bnei r3, align_arg \n\ -len_loop: \n\ - lw r3, r5, r9 \n\ - pcmpbf r4, r3, r0 \n\ - bnei r4, end_len \n\ - brid len_loop \n\ - addik r9, r9, 4 \n\ -end_len: \n\ - lbu r3, r5, r9 \n\ - beqi r3, done_len \n\ - brid end_len \n\ - addik r9, r9, 1 \n\ -done_len: \n\ - rtsd r15, 8 \n\ - or r3, r0, r9 /* Return len */ \n\ -align_arg: \n\ - rsubik r10, r3, 4 \n\ -align_loop: \n\ - lbu r3, r5, r9 \n\ - beqid r3, done_len \n\ - addik r10, r10, -1 \n\ - bneid r10, align_loop \n\ - addik r9, r9, 1 \n\ - bri len_loop"); - -#endif /* ! HAVE_HW_PCMP */ -} |