diff options
Diffstat (limited to 'sysdeps/alpha/strlen.c')
-rw-r--r-- | sysdeps/alpha/strlen.c | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/sysdeps/alpha/strlen.c b/sysdeps/alpha/strlen.c deleted file mode 100644 index 36f106c9c3..0000000000 --- a/sysdeps/alpha/strlen.c +++ /dev/null @@ -1,55 +0,0 @@ -/* Copyright (C) 1992 Free Software Foundation, Inc. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <string.h> - -/* Return the length of the null-terminated string STR. Scan for - the null terminator quickly by testing eight bytes at a time. */ - -size_t -strlen (const char *str) -{ - const char *char_ptr; - const unsigned long int *longword_ptr; - - /* Handle the first few characters by reading one character at a time. - Do this until STR is aligned on a 8-byte border. */ - for (char_ptr = str; ((unsigned long int) char_ptr & 7) != 0; ++char_ptr) - if (*char_ptr == '\0') - return char_ptr - str; - - longword_ptr = (unsigned long int *) char_ptr; - - for (;;) - { - const unsigned long int longword = *longword_ptr++; - int mask; - - /* Set bits in MASK if bytes in LONGWORD are zero. */ - asm ("cmpbge $31, %1, %0" : "=r" (mask) : "r" (longword)); - if (mask) - { - /* Which of the bytes was the zero? */ - const char *cp = (const char *) (longword_ptr - 1); - int i; - - for (i = 0; i < 8; i++) - if (cp[i] == 0) - return cp - str + i; - } - } -} |