mirror of
https://sourceware.org/git/glibc.git
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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
905 lines
22 KiB
C
905 lines
22 KiB
C
/* Optimized, inlined string functions. i386 version.
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Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _STRING_H
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# error "Never use <bits/string.h> directly; include <string.h> instead."
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#endif
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/* The ix86 processors can access unaligned multi-byte variables. */
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#define _STRING_ARCH_unaligned 1
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/* We only provide optimizations if the user selects them and if
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GNU CC is used. */
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#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
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&& defined __GNUC__ && __GNUC__ >= 2 && !__BOUNDED_POINTERS__
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#ifndef __STRING_INLINE
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# ifdef __cplusplus
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# define __STRING_INLINE inline
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# else
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# define __STRING_INLINE extern __inline
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# endif
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#endif
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/* Copy N bytes of SRC to DEST. */
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#define _HAVE_STRING_ARCH_memcpy 1
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#define memcpy(dest, src, n) \
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(__extension__ (__builtin_constant_p (n) \
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? __memcpy_c (dest, src, n) \
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: memcpy (dest, src, n)))
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/* This looks horribly ugly, but the compiler can optimize it totally,
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as the count is constant. */
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__STRING_INLINE void *__memcpy_c (void *__dest, __const void *__src,
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size_t __n);
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__STRING_INLINE void *
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__memcpy_c (void *__dest, __const void *__src, size_t __n)
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{
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register unsigned long int __d0, __d1, __d2;
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union {
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unsigned int __ui;
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unsigned short int __usi;
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unsigned char __uc;
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} *__u = __dest;
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switch (__n)
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{
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case 0:
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return __dest;
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case 1:
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__u->__uc = *(const unsigned char *) __src;
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return __dest;
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case 2:
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__u->__usi = *(const unsigned short int *) __src;
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return __dest;
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case 3:
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__u->__usi = *(const unsigned short int *) __src;
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__u = (void *) __u + 2;
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__u->__uc = *(2 + (const unsigned char *) __src);
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return __dest;
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case 4:
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__u->__ui = *(const unsigned int *) __src;
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return __dest;
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case 6:
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__u->__ui = *(const unsigned int *) __src;
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__u = (void *) __u + 4;
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__u->__usi = *(2 + (const unsigned short int *) __src);
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return __dest;
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case 8:
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__u->__ui = *(const unsigned int *) __src;
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__u = (void *) __u + 4;
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__u->__ui = *(1 + (const unsigned int *) __src);
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return __dest;
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case 12:
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__u->__ui = *(const unsigned int *) __src;
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__u = (void *) __u + 4;
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__u->__ui = *(1 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(2 + (const unsigned int *) __src);
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return __dest;
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case 16:
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__u->__ui = *(const unsigned int *) __src;
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__u = (void *) __u + 4;
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__u->__ui = *(1 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(2 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(3 + (const unsigned int *) __src);
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return __dest;
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case 20:
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__u->__ui = *(const unsigned int *) __src;
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__u = (void *) __u + 4;
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__u->__ui = *(1 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(2 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(3 + (const unsigned int *) __src);
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__u = (void *) __u + 4;
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__u->__ui = *(4 + (const unsigned int *) __src);
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return __dest;
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}
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#define __COMMON_CODE(x) \
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__asm__ __volatile__ \
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("cld\n\t" \
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"rep; movsl" \
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x \
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: "=&c" (__d0), "=&D" (__d1), "=&S" (__d2) \
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: "0" (__n / 4), "1" (&__u->__uc), "2" (__src) \
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: "memory");
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switch (__n % 4)
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{
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case 0:
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__COMMON_CODE ("");
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break;
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case 1:
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__COMMON_CODE ("\n\tmovsb");
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break;
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case 2:
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__COMMON_CODE ("\n\tmovsw");
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break;
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case 3:
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__COMMON_CODE ("\n\tmovsw\n\tmovsb");
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break;
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}
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return __dest;
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#undef __COMMON_CODE
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}
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/* Copy N bytes of SRC to DEST, guaranteeing
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correct behavior for overlapping strings. */
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#define _HAVE_STRING_ARCH_memmove 1
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#ifndef _FORCE_INLINES
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__STRING_INLINE void *
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memmove (void *__dest, __const void *__src, size_t __n)
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{
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register unsigned long int __d0, __d1, __d2;
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if (__dest < __src)
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__asm__ __volatile__
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("cld\n\t"
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"rep\n\t"
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"movsb"
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: "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
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: "0" (__n), "1" (__src), "2" (__dest)
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: "memory");
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else
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__asm__ __volatile__
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("std\n\t"
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"rep\n\t"
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"movsb\n\t"
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"cld"
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: "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
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: "0" (__n), "1" (__n - 1 + (const char *) __src),
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"2" (__n - 1 + (char *) __dest)
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: "memory");
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return __dest;
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}
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#endif
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/* Set N bytes of S to C. */
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#define _HAVE_STRING_ARCH_memset 1
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#define _USE_STRING_ARCH_memset 1
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#define memset(s, c, n) \
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(__extension__ (__builtin_constant_p (c) \
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? (__builtin_constant_p (n) \
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? __memset_cc (s, 0x01010101UL * (unsigned char) (c), n) \
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: __memset_cg (s, 0x01010101UL * (unsigned char) (c), n))\
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: __memset_gg (s, c, n)))
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__STRING_INLINE void *__memset_cc (void *__s, unsigned long int __pattern,
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size_t __n);
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__STRING_INLINE void *
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__memset_cc (void *__s, unsigned long int __pattern, size_t __n)
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{
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register unsigned long int __d0, __d1;
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union {
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unsigned int __ui;
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unsigned short int __usi;
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unsigned char __uc;
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} *__u = __s;
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switch (__n)
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{
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case 0:
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return __s;
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case 1:
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__u->__uc = __pattern;
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return __s;
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case 2:
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__u->__usi = __pattern;
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return __s;
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case 3:
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__u->__usi = __pattern;
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__u = __extension__ ((void *) __u + 2);
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__u->__uc = __pattern;
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return __s;
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case 4:
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__u->__ui = __pattern;
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return __s;
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}
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#define __COMMON_CODE(x) \
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__asm__ __volatile__ \
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("cld\n\t" \
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"rep; stosl" \
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x \
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: "=&c" (__d0), "=&D" (__d1) \
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: "a" (__pattern), "0" (__n / 4), "1" (&__u->__uc) \
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: "memory")
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switch (__n % 4)
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{
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case 0:
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__COMMON_CODE ("");
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break;
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case 1:
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__COMMON_CODE ("\n\tstosb");
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break;
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case 2:
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__COMMON_CODE ("\n\tstosw");
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break;
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case 3:
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__COMMON_CODE ("\n\tstosw\n\tstosb");
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break;
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}
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return __s;
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#undef __COMMON_CODE
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}
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__STRING_INLINE void *__memset_cg (void *__s, unsigned long __c, size_t __n);
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__STRING_INLINE void *
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__memset_cg (void *__s, unsigned long __c, size_t __n)
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{
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register unsigned long int __d0, __d1;
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__asm__ __volatile__
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("cld\n\t"
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"rep; stosl\n\t"
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"testb $2,%b3\n\t"
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"je 1f\n\t"
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"stosw\n"
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"1:\n\t"
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"testb $1,%b3\n\t"
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"je 2f\n\t"
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"stosb\n"
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"2:"
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: "=&c" (__d0), "=&D" (__d1)
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: "a" (__c), "q" (__n), "0" (__n / 4), "1" (__s)
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: "memory");
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return __s;
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}
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__STRING_INLINE void *__memset_gg (void *__s, char __c, size_t __n);
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__STRING_INLINE void *
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__memset_gg (void *__s, char __c, size_t __n)
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{
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register unsigned long int __d0, __d1;
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__asm__ __volatile__
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("cld\n\t"
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"rep; stosb"
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: "=&D" (__d0), "=&c" (__d1)
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: "a" (__c), "0" (__s), "1" (__n)
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: "memory");
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return __s;
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}
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/* Search N bytes of S for C. */
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#define _HAVE_STRING_ARCH_memchr 1
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#ifndef _FORCE_INLINES
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__STRING_INLINE void *
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memchr (__const void *__s, int __c, size_t __n)
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{
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register unsigned long int __d0;
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register void *__res;
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if (__n == 0)
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return NULL;
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__asm__ __volatile__
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("cld\n\t"
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"repne; scasb\n\t"
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"je 1f\n\t"
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"movl $1,%0\n"
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"1:"
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: "=D" (__res), "=&c" (__d0)
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: "a" (__c), "0" (__s), "1" (__n)
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: "cc");
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return __res - 1;
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}
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#endif
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#define _HAVE_STRING_ARCH_memrchr 1
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#ifndef _FORCE_INLINES
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__STRING_INLINE void *
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__memrchr (__const void *__s, int __c, size_t __n)
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{
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register unsigned long int __d0;
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register void *__res;
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if (__n == 0)
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return NULL;
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__asm__ __volatile__
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("std\n\t"
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"repne; scasb\n\t"
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"je 1f\n\t"
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"orl $-1,%0\n"
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"1:\tcld"
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: "=D" (__res), "=&c" (__d0)
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: "a" (__c), "0" (__s + __n - 1), "1" (__n)
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: "cc");
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return __res + 1;
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}
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# ifdef __USE_GNU
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# define memrchr(s, c, n) __memrchr (s, c, n)
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# endif
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#endif
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/* Return the length of S. */
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#define _HAVE_STRING_ARCH_strlen 1
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#ifndef _FORCE_INLINES
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__STRING_INLINE size_t
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strlen (__const char *__str)
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{
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register unsigned long int __d0;
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register size_t __res;
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__asm__ __volatile__
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("cld\n\t"
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"repne; scasb\n\t"
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"notl %0"
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: "=c" (__res), "=&D" (__d0)
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: "1" (__str), "a" (0), "0" (0xffffffff)
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: "cc");
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return __res - 1;
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}
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#endif
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/* Copy SRC to DEST. */
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#define _HAVE_STRING_ARCH_strcpy 1
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#ifndef _FORCE_INLINES
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__STRING_INLINE char *
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strcpy (char *__dest, __const char *__src)
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{
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register unsigned long int __d0, __d1;
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__asm__ __volatile__
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("cld\n"
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"1:\n\t"
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"lodsb\n\t"
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"stosb\n\t"
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"testb %%al,%%al\n\t"
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"jne 1b"
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: "=&S" (__d0), "=&D" (__d1)
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: "0" (__src), "1" (__dest)
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: "ax", "memory", "cc");
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return __dest;
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}
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#endif
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|
/* Copy no more than N characters of SRC to DEST. */
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|
#define _HAVE_STRING_ARCH_strncpy 1
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#ifndef _FORCE_INLINES
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|
__STRING_INLINE char *
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|
strncpy (char *__dest, __const char *__src, size_t __n)
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{
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register unsigned long int __d0, __d1, __d2;
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__asm__ __volatile__
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("cld\n"
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|
"1:\n\t"
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"decl %2\n\t"
|
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"js 2f\n\t"
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|
"lodsb\n\t"
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"stosb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"rep; stosb\n"
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|
"2:"
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|
: "=&S" (__d0), "=&D" (__d1), "=&c" (__d2)
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|
: "0" (__src), "1" (__dest), "2" (__n)
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|
: "ax", "memory", "cc");
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|
return __dest;
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|
}
|
|
#endif
|
|
|
|
/* Append SRC onto DEST. */
|
|
#define _HAVE_STRING_ARCH_strcat 1
|
|
#ifndef _FORCE_INLINES
|
|
__STRING_INLINE char *
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|
strcat (char *__dest, __const char *__src)
|
|
{
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|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
__asm__ __volatile__
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|
("cld\n\t"
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|
"repne; scasb\n\t"
|
|
"decl %1\n"
|
|
"1:\n\t"
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|
"lodsb\n\t"
|
|
"stosb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b"
|
|
: "=&S" (__d0), "=&D" (__d1), "=&c" (__d2), "=&a" (__d3)
|
|
: "0" (__src), "1" (__dest), "2" (0xffffffff), "3" (0)
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|
: "memory", "cc");
|
|
return __dest;
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|
}
|
|
#endif
|
|
|
|
/* Append no more than N characters from SRC onto DEST. */
|
|
#define _HAVE_STRING_ARCH_strncat 1
|
|
#ifndef _FORCE_INLINES
|
|
__STRING_INLINE char *
|
|
strncat (char *__dest, __const char *__src, size_t __n)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
__asm__ __volatile__
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|
("cld\n\t"
|
|
"repne; scasb\n\t"
|
|
"decl %1\n\t"
|
|
"movl %4,%2\n"
|
|
"1:\n\t"
|
|
"decl %2\n\t"
|
|
"js 2f\n\t"
|
|
"lodsb\n\t"
|
|
"stosb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"jmp 3f\n"
|
|
"2:\n\t"
|
|
"xorl %3,%3\n\t"
|
|
"stosb\n"
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|
"3:"
|
|
: "=&S" (__d0), "=&D" (__d1), "=&c" (__d2), "=&a" (__d3)
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|
: "g" (__n), "0" (__src), "1" (__dest), "2" (0xffffffff), "3" (0)
|
|
: "memory", "cc");
|
|
return __dest;
|
|
}
|
|
#endif
|
|
|
|
/* Compare S1 and S2. */
|
|
#define _HAVE_STRING_ARCH_strcmp 1
|
|
#ifndef _FORCE_INLINES
|
|
__STRING_INLINE int
|
|
strcmp (__const char *__s1, __const char *__s2)
|
|
{
|
|
register unsigned long int __d0, __d1;
|
|
register int __res;
|
|
__asm__ __volatile__
|
|
("cld\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"scasb\n\t"
|
|
"jne 2f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"xorl %%eax,%%eax\n\t"
|
|
"jmp 3f\n"
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|
"2:\n\t"
|
|
"sbbl %%eax,%%eax\n\t"
|
|
"orb $1,%%al\n"
|
|
"3:"
|
|
: "=a" (__res), "=&S" (__d0), "=&D" (__d1)
|
|
: "1" (__s1), "2" (__s2)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
#endif
|
|
|
|
/* Compare N characters of S1 and S2. */
|
|
#define _HAVE_STRING_ARCH_strncmp 1
|
|
#ifndef _FORCE_INLINES
|
|
__STRING_INLINE int
|
|
strncmp (__const char *__s1, __const char *__s2, size_t __n)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2;
|
|
register int __res;
|
|
__asm__ __volatile__
|
|
("cld\n"
|
|
"1:\n\t"
|
|
"decl %3\n\t"
|
|
"js 2f\n\t"
|
|
"lodsb\n\t"
|
|
"scasb\n\t"
|
|
"jne 3f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n"
|
|
"2:\n\t"
|
|
"xorl %%eax,%%eax\n\t"
|
|
"jmp 4f\n"
|
|
"3:\n\t"
|
|
"sbbl %%eax,%%eax\n\t"
|
|
"orb $1,%%al\n"
|
|
"4:"
|
|
: "=a" (__res), "=&S" (__d0), "=&D" (__d1), "=&c" (__d2)
|
|
: "1" (__s1), "2" (__s2), "3" (__n)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
#endif
|
|
|
|
/* 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) \
|
|
: __strchr_g (s, c)))
|
|
|
|
__STRING_INLINE char *__strchr_g (__const char *__s, int __c);
|
|
|
|
__STRING_INLINE char *
|
|
__strchr_g (__const char *__s, int __c)
|
|
{
|
|
register unsigned long int __d0;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"movb %%al,%%ah\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"cmpb %%ah,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"movl $1,%1\n"
|
|
"2:\n\t"
|
|
"movl %1,%0"
|
|
: "=a" (__res), "=&S" (__d0)
|
|
: "0" (__c), "1" (__s)
|
|
: "cc");
|
|
return __res - 1;
|
|
}
|
|
|
|
__STRING_INLINE char *__strchr_c (__const char *__s, int __c);
|
|
|
|
__STRING_INLINE char *
|
|
__strchr_c (__const char *__s, int __c)
|
|
{
|
|
register unsigned long int __d0;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"cmpb %%ah,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"movl $1,%1\n"
|
|
"2:\n\t"
|
|
"movl %1,%0"
|
|
: "=a" (__res), "=&S" (__d0)
|
|
: "0" (__c), "1" (__s)
|
|
: "cc");
|
|
return __res - 1;
|
|
}
|
|
|
|
|
|
/* Find the first occurrence of C in S or the final NUL byte. */
|
|
#define _HAVE_STRING_ARCH_strchrnul 1
|
|
#define __strchrnul(s, c) \
|
|
(__extension__ (__builtin_constant_p (c) \
|
|
? ((c) == '\0' \
|
|
? (char *) __rawmemchr (s, c) \
|
|
: __strchrnul_c (s, ((c) & 0xff) << 8)) \
|
|
: __strchrnul_g (s, c)))
|
|
|
|
__STRING_INLINE char *__strchrnul_g (__const char *__s, int __c);
|
|
|
|
__STRING_INLINE char *
|
|
__strchrnul_g (__const char *__s, int __c)
|
|
{
|
|
register unsigned long int __d0;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"movb %%al,%%ah\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"cmpb %%ah,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"2:\n\t"
|
|
"movl %1,%0"
|
|
: "=a" (__res), "=&S" (__d0)
|
|
: "0" (__c), "1" (__s)
|
|
: "cc");
|
|
return __res - 1;
|
|
}
|
|
|
|
__STRING_INLINE char *__strchrnul_c (__const char *__s, int __c);
|
|
|
|
__STRING_INLINE char *
|
|
__strchrnul_c (__const char *__s, int __c)
|
|
{
|
|
register unsigned long int __d0;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"cmpb %%ah,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"jne 1b\n\t"
|
|
"2:\n\t"
|
|
"movl %1,%0"
|
|
: "=a" (__res), "=&S" (__d0)
|
|
: "0" (__c), "1" (__s)
|
|
: "cc");
|
|
return __res - 1;
|
|
}
|
|
#ifdef __USE_GNU
|
|
# define strchrnul(s, c) __strchrnul (s, c)
|
|
#endif
|
|
|
|
|
|
/* Return the length of the initial segment of S which
|
|
consists entirely of characters not in REJECT. */
|
|
#define _HAVE_STRING_ARCH_strcspn 1
|
|
#ifndef _FORCE_INLINES
|
|
# ifdef __PIC__
|
|
__STRING_INLINE size_t
|
|
strcspn (__const char *__s, __const char *__reject)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("pushl %%ebx\n\t"
|
|
"cld\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%ebx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"movl %%ebx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"jne 1b\n"
|
|
"2:\n\t"
|
|
"popl %%ebx"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
|
|
: "d" (__reject), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return (__res - 1) - __s;
|
|
}
|
|
# else
|
|
__STRING_INLINE size_t
|
|
strcspn (__const char *__s, __const char *__reject)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%edx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"movl %%edx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"jne 1b\n"
|
|
"2:"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&d" (__d2), "=&D" (__d3)
|
|
: "g" (__reject), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return (__res - 1) - __s;
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
|
|
/* Return the length of the initial segment of S which
|
|
consists entirely of characters in ACCEPT. */
|
|
#define _HAVE_STRING_ARCH_strspn 1
|
|
#ifndef _FORCE_INLINES
|
|
# ifdef __PIC__
|
|
__STRING_INLINE size_t
|
|
strspn (__const char *__s, __const char *__accept)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("pushl %%ebx\n\t"
|
|
"cld\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%ebx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"movl %%ebx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"je 1b\n"
|
|
"2:\n\t"
|
|
"popl %%ebx"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
|
|
: "r" (__accept), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return (__res - 1) - __s;
|
|
}
|
|
# else
|
|
__STRING_INLINE size_t
|
|
strspn (__const char *__s, __const char *__accept)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%edx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"movl %%edx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"je 1b\n"
|
|
"2:"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&d" (__d2), "=&D" (__d3)
|
|
: "g" (__accept), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return (__res - 1) - __s;
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
|
|
/* Find the first occurrence in S of any character in ACCEPT. */
|
|
#define _HAVE_STRING_ARCH_strpbrk 1
|
|
#ifndef _FORCE_INLINES
|
|
# ifdef __PIC__
|
|
__STRING_INLINE char *
|
|
strpbrk (__const char *__s, __const char *__accept)
|
|
{
|
|
unsigned long int __d0, __d1, __d2;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("pushl %%ebx\n\t"
|
|
"cld\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%ebx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"movl %%ebx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"jne 1b\n\t"
|
|
"decl %0\n\t"
|
|
"jmp 3f\n"
|
|
"2:\n\t"
|
|
"xorl %0,%0\n"
|
|
"3:\n\t"
|
|
"popl %%ebx"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&D" (__d2)
|
|
: "r" (__accept), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
# else
|
|
__STRING_INLINE char *
|
|
strpbrk (__const char *__s, __const char *__accept)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t"
|
|
"movl %%ecx,%%edx\n"
|
|
"1:\n\t"
|
|
"lodsb\n\t"
|
|
"testb %%al,%%al\n\t"
|
|
"je 2f\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"movl %%edx,%%ecx\n\t"
|
|
"repne; scasb\n\t"
|
|
"jne 1b\n\t"
|
|
"decl %0\n\t"
|
|
"jmp 3f\n"
|
|
"2:\n\t"
|
|
"xorl %0,%0\n"
|
|
"3:"
|
|
: "=&S" (__res), "=&a" (__d0), "=&c" (__d1), "=&d" (__d2), "=&D" (__d3)
|
|
: "g" (__accept), "0" (__s), "1" (0), "2" (0xffffffff)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
|
|
/* Find the first occurrence of NEEDLE in HAYSTACK. */
|
|
#define _HAVE_STRING_ARCH_strstr 1
|
|
#ifndef _FORCE_INLINES
|
|
# ifdef __PIC__
|
|
__STRING_INLINE char *
|
|
strstr (__const char *__haystack, __const char *__needle)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("pushl %%ebx\n\t"
|
|
"cld\n\t" \
|
|
"movl %4,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */
|
|
"movl %%ecx,%%ebx\n"
|
|
"1:\n\t"
|
|
"movl %4,%%edi\n\t"
|
|
"movl %%esi,%%eax\n\t"
|
|
"movl %%ebx,%%ecx\n\t"
|
|
"repe; cmpsb\n\t"
|
|
"je 2f\n\t" /* also works for empty string, see above */
|
|
"xchgl %%eax,%%esi\n\t"
|
|
"incl %%esi\n\t"
|
|
"cmpb $0,-1(%%eax)\n\t"
|
|
"jne 1b\n\t"
|
|
"xorl %%eax,%%eax\n\t"
|
|
"2:\n\t"
|
|
"popl %%ebx"
|
|
: "=&a" (__res), "=&c" (__d0), "=&S" (__d1), "=&D" (__d2)
|
|
: "r" (__needle), "0" (0), "1" (0xffffffff), "2" (__haystack)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
# else
|
|
__STRING_INLINE char *
|
|
strstr (__const char *__haystack, __const char *__needle)
|
|
{
|
|
register unsigned long int __d0, __d1, __d2, __d3;
|
|
register char *__res;
|
|
__asm__ __volatile__
|
|
("cld\n\t" \
|
|
"movl %5,%%edi\n\t"
|
|
"repne; scasb\n\t"
|
|
"notl %%ecx\n\t"
|
|
"decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */
|
|
"movl %%ecx,%%edx\n"
|
|
"1:\n\t"
|
|
"movl %5,%%edi\n\t"
|
|
"movl %%esi,%%eax\n\t"
|
|
"movl %%edx,%%ecx\n\t"
|
|
"repe; cmpsb\n\t"
|
|
"je 2f\n\t" /* also works for empty string, see above */
|
|
"xchgl %%eax,%%esi\n\t"
|
|
"incl %%esi\n\t"
|
|
"cmpb $0,-1(%%eax)\n\t"
|
|
"jne 1b\n\t"
|
|
"xorl %%eax,%%eax\n\t"
|
|
"2:"
|
|
: "=&a" (__res), "=&c" (__d0), "=&S" (__d1), "=&d" (__d2), "=&D" (__d3)
|
|
: "g" (__needle), "0" (0), "1" (0xffffffff), "2" (__haystack)
|
|
: "cc");
|
|
return __res;
|
|
}
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef _FORCE_INLINES
|
|
# undef __STRING_INLINE
|
|
#endif
|
|
|
|
#endif /* use string inlines && GNU CC */
|