diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-08-27 20:26:10 +0000 |
commit | 92f1da4da04a7a86ddee91be5eaf0b10c333ac64 (patch) | |
tree | 2a10ce9e4e407e7e5b5ca092ca0947d234b5ff60 /sysdeps/i386/bits/string.h | |
parent | 22be878ecbc66606371bd33258f56e6711e6ba7a (diff) | |
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Update.cvs/libc-ud-970827
1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com>
* nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody
should update this to use the new db API.
* nss/nss_db/db-netgrp.c: Likewise.
* nss/nss_db/db-alias.c: Likewise.
* db2/Makefile: Makefile for db-2.x in glibc.
1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com>
* csu/Makefile (before-compile): New goal. Make sure abi-tag.h
is generated.
[$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found.
* Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add
-D__USE_STRING_INLINES.
* string/string.f: Move strnlen optimization after inclusion of
<bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES
is defined.
* sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name
in <bits/string.h>.
* sysdeps/generic/memset.c: Likewise.
* sysdeps/i386/string.h: i386 optimized string functions.
* sysdeps/i386/i486string.h: i486+ optimized string functions.
* Makefile (subdirs): Change db to db2.
* shlib-versions: Bump libdb verion number to 3.
* include/db.h: Include from db2 directory.
* include/db_185.h: New file.
* sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros
to provide spinlock information for db2.
* sysdeps/m68k/m68020/Makefile: New file. Likewise.
* sysdeps/sparc/Makefile: New file. Likewise.
* sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS):
Add -DHAVE_LLSEEK.
* db2/config.h: Hand-edited config file for db2 in glibc.
* db2/compat.h: New file from db-2.3.4.
* db2/db.h: Likewise.
* db2/db_185.h: Likewise.
* db2/db_int.h: Likewise.
* db2/makedb.c: Likewise.
* db2/btree/bt_close.c: Likewise.
* db2/btree/bt_compare.c: Likewise.
* db2/btree/bt_conv.c: Likewise.
* db2/btree/bt_cursor.c: Likewise.
* db2/btree/bt_delete.c: Likewise.
* db2/btree/bt_open.c: Likewise.
* db2/btree/bt_page.c: Likewise.
* db2/btree/bt_put.c: Likewise.
* db2/btree/bt_rec.c: Likewise.
* db2/btree/bt_recno.c: Likewise.
* db2/btree/btree_auto.c: Likewise.
* db2/btree/bt_rsearch.c: Likewise.
* db2/btree/bt_search.c: Likewise.
* db2/btree/bt_split.c: Likewise.
* db2/btree/bt_stat.c: Likewise.
* db2/btree/btree.src: Likewise.
* db2/common/db_appinit.c: Likewise.
* db2/common/db_err.c: Likewise.
* db2/common/db_byteorder.c: Likewise.
* db2/common/db_apprec.c: Likewise.
* db2/common/db_salloc.c: Likewise.
* db2/common/db_log2.c: Likewise.
* db2/common/db_region.c: Likewise.
* db2/common/db_shash.c: Likewise.
* db2/db/db.c: Likewise.
* db2/db/db.src: Likewise.
* db2/db/db_conv.c: Likewise.
* db2/db/db_dispatch.c: Likewise.
* db2/db/db_dup.c: Likewise.
* db2/db/db_overflow.c: Likewise.
* db2/db/db_pr.c: Likewise.
* db2/db/db_rec.c: Likewise.
* db2/db/db_ret.c: Likewise.
* db2/db/db_thread.c: Likewise.
* db2/db/db_auto.c: Likewise.
* db2/db185/db185.c: Likewise.
* db2/db185/db185_int.h: Likewise.
* db2/dbm/dbm.c: Likewise.
* db2/hash/hash.c: Likewise.
* db2/hash/hash.src: Likewise.
* db2/hash/hash_page.c: Likewise.
* db2/hash/hash_conv.c: Likewise.
* db2/hash/hash_debug.c: Likewise.
* db2/hash/hash_stat.c: Likewise.
* db2/hash/hash_rec.c: Likewise.
* db2/hash/hash_dup.c: Likewise.
* db2/hash/hash_func.c: Likewise.
* db2/hash/hash_auto.c: Likewise.
* db2/include/mp.h: Likewise.
* db2/include/btree.h: Likewise.
* db2/include/db.h.src: Likewise.
* db2/include/db_int.h.src: Likewise.
* db2/include/db_shash.h: Likewise.
* db2/include/db_swap.h: Likewise.
* db2/include/db_185.h.src: Likewise.
* db2/include/txn.h: Likewise.
* db2/include/db_am.h: Likewise.
* db2/include/shqueue.h: Likewise.
* db2/include/hash.h: Likewise.
* db2/include/db_dispatch.h: Likewise.
* db2/include/lock.h: Likewise.
* db2/include/db_page.h: Likewise.
* db2/include/log.h: Likewise.
* db2/include/db_auto.h: Likewise.
* db2/include/btree_auto.h: Likewise.
* db2/include/hash_auto.h: Likewise.
* db2/include/log_auto.h: Likewise.
* db2/include/txn_auto.h: Likewise.
* db2/include/db_ext.h: Likewise.
* db2/include/btree_ext.h: Likewise.
* db2/include/clib_ext.h: Likewise.
* db2/include/common_ext.h: Likewise.
* db2/include/hash_ext.h: Likewise.
* db2/include/lock_ext.h: Likewise.
* db2/include/log_ext.h: Likewise.
* db2/include/mp_ext.h: Likewise.
* db2/include/mutex_ext.h: Likewise.
* db2/include/os_ext.h: Likewise.
* db2/include/txn_ext.h: Likewise.
* db2/include/cxx_int.h: Likewise.
* db2/include/db_cxx.h: Likewise.
* db2/include/queue.h: Likewise.
* db2/lock/lock.c: Likewise.
* db2/lock/lock_conflict.c: Likewise.
* db2/lock/lock_util.c: Likewise.
* db2/lock/lock_deadlock.c: Likewise.
* db2/log/log.c: Likewise.
* db2/log/log_get.c: Likewise.
* db2/log/log.src: Likewise.
* db2/log/log_compare.c: Likewise.
* db2/log/log_put.c: Likewise.
* db2/log/log_rec.c: Likewise.
* db2/log/log_archive.c: Likewise.
* db2/log/log_register.c: Likewise.
* db2/log/log_auto.c: Likewise.
* db2/log/log_findckp.c: Likewise.
* db2/mp/mp_bh.c: Likewise.
* db2/mp/mp_fget.c: Likewise.
* db2/mp/mp_fopen.c: Likewise.
* db2/mp/mp_fput.c: Likewise.
* db2/mp/mp_fset.c: Likewise.
* db2/mp/mp_open.c: Likewise.
* db2/mp/mp_region.c: Likewise.
* db2/mp/mp_pr.c: Likewise.
* db2/mp/mp_sync.c: Likewise.
* db2/mutex/68020.gcc: Likewise.
* db2/mutex/mutex.c: Likewise.
* db2/mutex/README: Likewise.
* db2/mutex/x86.gcc: Likewise.
* db2/mutex/sparc.gcc: Likewise.
* db2/mutex/uts4.cc.s: Likewise.
* db2/mutex/alpha.dec: Likewise.
* db2/mutex/alpha.gcc: Likewise.
* db2/mutex/parisc.gcc: Likewise.
* db2/mutex/parisc.hp: Likewise.
* db2/os/db_os_abs.c: Likewise.
* db2/os/db_os_dir.c: Likewise.
* db2/os/db_os_fid.c: Likewise.
* db2/os/db_os_lseek.c: Likewise.
* db2/os/db_os_mmap.c: Likewise.
* db2/os/db_os_open.c: Likewise.
* db2/os/db_os_rw.c: Likewise.
* db2/os/db_os_sleep.c: Likewise.
* db2/os/db_os_stat.c: Likewise.
* db2/os/db_os_unlink.c: Likewise.
* db2/txn/txn.c: Likewise.
* db2/txn/txn.src: Likewise.
* db2/txn/txn_rec.c: Likewise.
* db2/txn/txn_auto.c: Likewise.
* db2/clib/getlong.c: Likewise.
* db2/progs/db_archive/db_archive.c: Likewise.
* db2/progs/db_checkpoint/db_checkpoint.c: Likewise.
* db2/progs/db_deadlock/db_deadlock.c: Likewise.
* db2/progs/db_dump/db_dump.c: Likewise.
* db2/progs/db_dump185/db_dump185.c: Likewise.
* db2/progs/db_load/db_load.c: Likewise.
* db2/progs/db_printlog/db_printlog.c: Likewise.
* db2/progs/db_recover/db_recover.c: Likewise.
* db2/progs/db_stat/db_stat.c: Likewise.
* libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline.
* po/de.po, po/sv.po: Update from 2.0.5 translations.
* sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print.
* sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback
as const.
* sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const.
* sunrpx/xdr_rec.c (xdrrec_destroy): Likewise.
* sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise.
1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>.
Reported by Benjamin Kosnik <bkoz@cygnus.com>.
1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com>
* abi-tags: New file.
* csu/Makefile (distribute): Remove abi-tag.h.
($(objpfx)abi-tag.h): New target.
* Makefile (distribute): Add abi-tags.
* sysdeps/unix/sysv/linux/abi-tag.h: File removed.
* sysdeps/mach/hurd/abi-tag.h: File removed.
* sysdeps/stub/abi-tag.h: File removed.
1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/make-syscalls.sh: Change output so that it
generates compilation rules only for the currently selected object
suffixes.
1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous
section to avoid confusing the compiler.
* sysdeps/alpha/dl-machine.h (RTLD_START): Likewise.
* sysdeps/i386/dl-machine.h (RTLD_START): Likewise.
* sysdeps/mips/dl-machine.h (RTLD_START): Likewise.
* sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise.
* sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise.
* sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT
relocation instead of a constant to avoid text relocation.
(ELF_MACHINE_BEFORE_RTLD_RELOC): Removed.
(RTLD_START): Declare global labels as functions and add size
directive.
1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/bits/select.h: Correct assembler versions to work even
for descriptors >= 32.
* stdlib/alloca.h: Don't define alloca to __alloca since if gcc
is used __alloca is not defined to __builtin_alloca and so might
not be available.
Reported by Uwe Ohse <uwe@ohse.de>.
* sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special
way if gcc is not used and so dev_t is an array.
Reported by Uwe Ohse <uwe@ohse.de>.
1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* manual/libc.texinfo: Reorder chapters to match logical order.
1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com>
* sunrpc/rpc/xdr.h: Change name of parameters in prototypes of
xdr_reference, xdrmem_create, and xdrstdio_create because of clash
with g++ internal symbols.
Patch by Sudish Joseph <sj@eng.mindspring.net>.
* elf/dl-deps.c: Implement handling of DT_FILTER.
Diffstat (limited to 'sysdeps/i386/bits/string.h')
-rw-r--r-- | sysdeps/i386/bits/string.h | 745 |
1 files changed, 745 insertions, 0 deletions
diff --git a/sysdeps/i386/bits/string.h b/sysdeps/i386/bits/string.h new file mode 100644 index 0000000000..254db3e7f3 --- /dev/null +++ b/sysdeps/i386/bits/string.h @@ -0,0 +1,745 @@ +/* Optimized, inlined string functions. i386 version. + Copyright (C) 1997 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. + + 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _STRING_H +#error "Never use <bits/string.h> directly; include <string.h> instead." +#endif + +/* We only provide optimizations for the GNU CC. */ +#if defined __GNUC__ && __GNUC__ >= 2 + +#ifdef __cplusplus +# define __STRING_INLINE inline +#else +# define __STRING_INLINE extern __inline +#endif + + +/* Copy N bytes of SRC to DEST. */ +#define memcpy(dest, src, n) \ + (__extension__ (__builtin_constant_p (n) \ + ? __memcpy_c (dest, src, n) \ + : memcpy (dest, src, n))) +/* This looks horribly ugly, but the compiler can optimize it totally, + as the count is constant. */ +__STRING_INLINE void * +__memcpy_c (void *__dest, __const void *__src, size_t __n) +{ + switch (n) + { + case 0: + return __dest; + case 1: + *(unsigned char *) __dest = *(const unsigned char *) __src; + return __dest; + case 2: + *(unsigned short int *) __dest = *(const unsigned short int *) __src; + return __dest; + case 3: + *(unsigned short int *) __dest = *(const unsigned short int *) __src; + *(2 + (unsigned char *) __dest) = *(2 + (const unsigned char *) __src); + return __dest; + case 4: + *(unsigned long int *) __dest = *(const unsigned long int *) __src; + return __dest; + case 6: /* for ethernet addresses */ + *(unsigned long int *) __dest = *(const unsigned long int *) __src; + *(2 + (unsigned short int *) __dest) = + *(2 + (const unsigned short int *) __src); + return __dest; + case 8: + *(unsigned long int *) __dest = *(const unsigned long int *) __to; + *(1 + (unsigned long int *) __dest) = + *(1 + (const unsigned long int *) __src); + return __dest; + case 12: + *(unsigned long int *) __dest = *(const unsigned long int *) __src; + *(1 + (unsigned long int *) __dest) = + *(1 + (const unsigned long int *) __src); + *(2 + (unsigned long int *) __dest) = + *(2 + (const unsigned long int *) __src); + return __dest; + case 16: + *(unsigned long int *) __dest = *(const unsigned long int *) __src; + *(1 + (unsigned long int *) __dest) = + *(1 + (const unsigned long int *) __src); + *(2 + (unsigned long int *) __dest) = + *(2 + (const unsigned long int *) __src); + *(3 + (unsigned long int *) __dest) = + *(3 + (const unsigned long int *) __src); + return __dest; + case 20: + *(unsigned long int *) __dest = *(const unsigned long int *) __src; + *(1 + (unsigned long int *) __dest) = + *(1 + (const unsigned long int *) __src); + *(2 + (unsigned long int *) __dest) = + *(2 + (const unsigned long int *) __src); + *(3 + (unsigned long int *) __dest) = + *(3 + (const unsigned long int *) __src); + *(4 + (unsigned long int *) __dest) = + *(4 + (const unsigned long int *) __src); + return __dest; + } +#define __COMMON_CODE(x) \ + __asm__ __volatile__ \ + ("cld\n\t" \ + "rep; movsl" \ + x \ + : /* no outputs */ \ + : "c" (n / 4), "D" (__dest), "S" (__src) \ + : "cx", "di", "si", "memory"); + + switch (n % 4) + { + case 0: + __COMMON_CODE (""); + return __dest; + case 1: + __COMMON_CODE ("\n\tmovsb"); + return __dest; + case 2: + __COMMON_CODE ("\n\tmovsw"); + return __dest; + case 3: + __COMMON_CODE ("\n\tmovsw\n\tmovsb"); + return __dest; + } +#undef __COMMON_CODE +} + + +/* Copy N bytes of SRC to DEST, guaranteeing + correct behavior for overlapping strings. */ +__STRING_INLINE void * +memmove (void *__dest, __const void *__src, size_t __n) +{ + if (__dest < __src) + __asm__ __volatile__ + ("cld\n\t" + "rep\n\t" + "movsb" + : /* no output */ + : "c" (__n), "S" (__src),"D" (__dest) + : "cx", "si", "di"); + else + __asm__ __volatile__ + ("std\n\t" + "rep\n\t" + "movsb\n\t" + "cld" + : /* no output */ + : "c" (__n), "S" (__n - 1 + (const char *) __src), + "D" (__n - 1 + (char *) __dest) + : "cx", "si", "di", "memory"); + return __dest; +} + + +/* Set N bytes of S to C. */ +#define memset(s, c, n) \ + (__extension__ (__builtin_constant_p (c) \ + ? (__builtin_constant_p (n) \ + ? __memset_cc (s, 0x01010101UL * (unsigned char) (c), n) \ + : __memset_cg (s, 0x01010101UL * (unsigned char) (c), n))\ + : __memset_gg (s, c, n))) + +__STRING_INLINE void * +__memset_cc (void *__s, unsigned long int __pattern, size_t __n) +{ + switch (__n) + { + case 0: + return s; + case 1: + *(unsigned char *) __s = __pattern; + return __s; + case 2: + *(unsigned short int *) __s = __pattern; + return s; + case 3: + *(unsigned short int *) __s = __pattern; + *(2 + (unsigned char *) __s) = __pattern; + return __s; + case 4: + *(unsigned long *) __s = __pattern; + return __s; + } +#define __COMMON_CODE(x) \ + __asm__ __volatile__ \ + ("cld\n\t" \ + "rep; stosl" \ + x \ + : /* no outputs */ \ + : "a" (__pattern),"c" (__n / 4), "D" (__s) \ + : "cx", "di", "memory") + + switch (__n % 4) + { + case 0: + __COMMON_CODE (""); + return __s; + case 1: + __COMMON_CODE ("\n\tstosb"); + return __s; + case 2: + __COMMON__CODE ("\n\tstosw"); + return s; + case 3: + __COMMON_CODE ("\n\tstosw\n\tstosb"); + return __s; + } +#undef __COMMON_CODE +} + +__STRING_INLINE void * +__memset_cg (void *__s, unsigned long __c, size_t __n) +{ + __asm__ __volatile__ + ("cld\n\t" + "rep; stosl\n\t" + "testb $2,%b1\n\t" + "je 1f\n\t" + "stosw\n" + "1:\n\t" + "testb $1,%b1\n\t" + "je 2f\n\t" + "stosb\n" + "2:" + : /* no output */ + : "a" (__c), "q" (__n), "c" (__n / 4), "D" (__s) + : "cx", "di", "memory"); + return __s; +} + +__STRING_INLINE void * +__memset_gg (void *__s, char __c, size_t __n) +{ + __asm__ __volatile__ + ("cld\n\t" + "rep\n\t" + "stosb" + : /* no output */ + : "a" (__c),"D" (__s), "c" (__n) + : "cx", "di", "memory"); + return __s; +} + + + + +/* Search N bytes of S for C. */ +__STRING_INLINE void * +memchr (__const void *__s, int __c, size_t __n) +{ + register void *__res; + if (count == 0) + return NULL; + __asm__ __volatile__ + ("cld\n\t" + "repne; scasb\n\t" + "je 1f\n\t" + "movl $1,%0\n" + "1:\n\t" + "decl %0" + : "=D" (__res) + : "a" (__c), "D" (__s), "c" (__n) + : "cx", "cc"); + return __res; +} + + +/* Search N bytes of S for C. */ +__STRING_INLINE void * +memchr (__const void *__s, int __c, size_t __n) +{ + register void *__res; + if (count == 0) + return NULL; + __asm__ __volatile__ + ("cld\n\t" + "repne\n\t" + "scasb\n\t" + "je 1f\n\t" + "movl $1,%0\n" + "1:" + : "=D" (__res) + : "a" (__c), "0" (__s), "c" (__n) + : "cx"); + return __res - 1; +} + + +/* Return the length of S. */ +__STRING_INLINE size_t +strlen (__const char *__str) +{ + register size_t __res; + __asm__ __volatile__ + ("cld\n\t" + "repne; scasb\n\t" + "notl %0" + : "=c" (__res) + : "D" (__str), "a" (0), "0" (0xffffffff) + : "di", "cc"); + return __res - 1; +} + + +/* Copy SRC to DEST. */ +__STRING_INLINE char * +strcpy (char *__dest, __const char *__src) +{ + __asm__ __volatile__ + ("cld\n" + "1:\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + : /* no output */ + : "S" (__src), "D" (__dest) + : "si", "di", "ax", "memory", "cc"); + return __dest; +} + + +/* Copy no more than N characters of SRC to DEST. */ +__STRING_INLINE char * +strncpy (char *__dest, __const char *__src, size_t __n) +{ + __asm__ __volatile__ + ("cld\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" + "rep; stosb\n" + "2:" + : /* no output */ + : "S" (__src), "D" (__dest), "c" (__n) + : "si", "di", "ax", "cx", "memory", "cc"); + return __dest; +} + + +/* Append SRC onto DEST. */ +__STRING_INLINE char * +strcat (char *__dest, __const char *__src) +{ + __asm__ __volatile__ + ("cld\n\t" + "repne; scasb\n\t" + "decl %1\n" + "1:\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + : /* no output */ + : "S" (__src), "D" (__dest), "a" (0), "c" (0xffffffff) + : "si", "di", "ax", "cx", "memory", "cc"); + return __dest; +} + + +/* Append no more than N characters from SRC onto DEST. */ +__STRING_INLINE char * +strncat (char *__dest, __const char *__src, size_t __n) +{ + __asm__ __volatile__ + ("cld\n\t" + "repne; scasb\n\t" + "decl %1\n\t" + "movl %4,%3\n" + "1:\n\t" + "decl %3\n\t" + "js 2f\n\t" + "lodsb\n\t" + "stosb\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n" + "2:\n\t" + "xorl %2,%2\n\t" + "stosb" + : /* no output */ + : "S" (__src), "D" (__dest), "a" (0), "c" (0xffffffff), "g" (__n) + : "si", "di", "ax", "cx", "memory", "cc"); + return __dest; +} + + +/* Compare S1 and S2. */ +__STRING_INLINE int +strcmp (__const char *__s1, __const char *__s2) +{ + 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" + "2:\n\t" + "sbbl %%eax,%%eax\n\t" + "orb $1,%%eax\n" + "3:" + : "=a" (__res) + : "S" (__s1), "D" (__s2) + : "si", "di", "cc"); + return __res; +} + + +/* Compare N characters of S1 and S2. */ +__STRING_INLINE int +strncmp (__const char *__s1, __const char *__s2, size_t __n) +{ + 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" (__s1), "D" (__s2), "c" (__n) + : "si", "di", "cx", "cc"); + return __res; +} + + +/* Find the first occurrence of C in S. */ +#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) +{ + 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" (__s), "0" (__c) + : "si", "cc"); + return __res - 1; +} + +__STRING_INLINE char * +__strchr_c (__const char *__s, int __c) +{ + 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" (__s), "0" (__c) + : "si", "cc"); + return __res - 1; +} + + +/* Return the length of the initial segment of S which + consists entirely of characters not in REJECT. */ +#ifdef __PIC__ +__STRING_INLINE size_t +strcspn (__const char *__s, __const char *__reject) +{ + 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" (0), "c" (0xffffffff), "0" (__s), "g" (__reject) + : "ax", "cx", "di", "cc"); + return (__res - 1) - __s; +} +#else +__STRING_INLINE size_t +strcspn (__const char *__s, __const char *__reject) +{ + register char *__res; + __asm__ __volatile__ + ("cld\n\t" + "movl %4,%%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 %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne; scasb\n\t" + "jne 1b\n" + "2:" + : "=S" (__res) + : "a" (0), "c" (0xffffffff),"0" (__s), "g" (__reject) + : "ax", "cx", "dx", "di", "cc"); + return (__res - 1) - __s; +} +#endif + + +/* Return the length of the initial segment of S which + consists entirely of characters in ACCEPT. */ +#ifdef __PIC__ +__STRING_INLINE size_t +strspn (__const char *__s, __const char *__accept) +{ + 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" (0), "c" (0xffffffff), "0" (__s), "g" (__accept) + : "ax", "cx", "di", "cc"); + return (__res - 1) - __s; +} +#else +__STRING_INLINE size_t +strspn (__const char *__s, __const char *__accept) +{ + register char *__res; + __asm__ __volatile__ + ("cld\n\t" + "movl %4,%%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 %4,%%edi\n\t" + "movl %%edx,%%ecx\n\t" + "repne; scasb\n\t" + "je 1b\n" + "2:" + : "=S" (__res) + : "a" (0), "c" (0xffffffff), "0" (__s), "g" (__accept) + : "ax", "cx", "dx", "di", "cc"); + return (__res - 1) - __s; +} +#endif + + +/* Find the first occurrence in S of any character in ACCEPT. */ +#ifdef __PIC__ +__STRING_INLINE char * +strpbrk (__const char *__s, __const char *__accept) +{ + 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" (0), "c" (0xffffffff), "0" (__s), "g" (__accept) + : "ax", "cx", "di", "cc"); + return __res; +} +#else +__STRING_INLINE char * +strpbrk (__const char *__s, __const char *__accept) +{ + register char *__res; + __asm__ __volatile__ + ("cld\n\t" + "movl %4,%%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 %4,%%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" (0), "c" (0xffffffff), "0" (__s), "g" (__accept) + : "ax", "cx", "dx", "di", "cc"); + return __res; +} +#endif + + +/* Find the first occurrence of NEEDLE in HAYSTACK. */ +#ifdef __PIC__ +__STRING_INLINE char * +strstr (__const char *__haystack, __const char *__needle) +{ + 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) + : "0" (0), "c" (0xffffffff), "S" (__haystack), "g" (__needle) + : "cx", "di", "si", "cc"); + return __res; +} +#else +__STRING_INLINE char * +strstr (__const char *__haystack, __const char *__needle) +{ + register char *__res; + __asm__ __volatile__ + ("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,%%edx\n" + "1:\n\t" + "movl %4,%%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) + : "0" (0), "c" (0xffffffff), "S" (__haystack), "g" (__needle) + : "cx", "dx", "di", "si", "cc"); + return __res; +} +#endif + + +#undef __STRING_INLINE + +#endif /* GNU CC */ |