diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/bits/string.h')
| -rw-r--r-- | libc/sysdeps/linux/i386/bits/string.h | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/libc/sysdeps/linux/i386/bits/string.h b/libc/sysdeps/linux/i386/bits/string.h index 44d6f8ba4..79bd40b97 100644 --- a/libc/sysdeps/linux/i386/bits/string.h +++ b/libc/sysdeps/linux/i386/bits/string.h @@ -1,21 +1,21 @@ /* Optimized, inlined string functions. i386 version. - Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. 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. + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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. + Lesser 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #ifndef _STRING_H # error "Never use <bits/string.h> directly; include <string.h> instead." @@ -28,7 +28,7 @@ /* We only provide optimizations if the user selects them and if GNU CC is used. */ #if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \ - && defined __GNUC__ && __GNUC__ >= 2 + && defined __GNUC__ && __GNUC__ >= 2 && !__BOUNDED_POINTERS__ #ifndef __STRING_INLINE # ifdef __cplusplus @@ -176,6 +176,7 @@ memmove (void *__dest, __const void *__src, size_t __n) /* Set N bytes of S to C. */ #define _HAVE_STRING_ARCH_memset 1 +#define _USE_STRING_ARCH_memset 1 #define memset(s, c, n) \ (__extension__ (__builtin_constant_p (c) \ ? (__builtin_constant_p (n) \ @@ -300,11 +301,37 @@ memchr (__const void *__s, int __c, size_t __n) "movl $1,%0\n" "1:" : "=D" (__res), "=&c" (__d0) - : "a" (__c), "0" (__s), "1" (__n)); + : "a" (__c), "0" (__s), "1" (__n) + : "cc"); return __res - 1; } #endif +#define _HAVE_STRING_ARCH_memrchr 1 +#ifndef _FORCE_INLINES +__STRING_INLINE void * +__memrchr (__const void *__s, int __c, size_t __n) +{ + register unsigned long int __d0; + register void *__res; + if (__n == 0) + return NULL; + __asm__ __volatile__ + ("std\n\t" + "repne; scasb\n\t" + "je 1f\n\t" + "orl $-1,%0\n" + "1:\tcld" + : "=D" (__res), "=&c" (__d0) + : "a" (__c), "0" (__s + __n - 1), "1" (__n) + : "cc"); + return __res + 1; +} +# ifdef __USE_GNU +# define memrchr(s, c, n) __memrchr (s, c, n) +# endif +#endif + /* Return the length of S. */ #define _HAVE_STRING_ARCH_strlen 1 #ifndef _FORCE_INLINES @@ -444,7 +471,7 @@ strcmp (__const char *__s1, __const char *__s2) "jmp 3f\n" "2:\n\t" "sbbl %%eax,%%eax\n\t" - "orb $1,%%eax\n" + "orb $1,%%al\n" "3:" : "=a" (__res), "=&S" (__d0), "=&D" (__d1) : "1" (__s1), "2" (__s2) @@ -487,6 +514,7 @@ strncmp (__const char *__s1, __const char *__s2, size_t __n) /* Find the first occurrence of C in S. */ #define _HAVE_STRING_ARCH_strchr 1 +#define _USE_STRING_ARCH_strchr 1 #define strchr(s, c) \ (__extension__ (__builtin_constant_p (c) \ ? __strchr_c (s, ((c) & 0xff) << 8) \ |