From 92f1da4da04a7a86ddee91be5eaf0b10c333ac64 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 27 Aug 1997 20:26:10 +0000 Subject: Update. 1997-08-10 19:17 Philip Blundell * nss/nss_db/db-XXX.c: Include not . 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 * 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 . Include only if __USE_STRING_INLINES is defined. * sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name in . * 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 * sysdeps/unix/sysv/linux/if_index.c: Include . Reported by Benjamin Kosnik . 1997-08-27 02:27 Roland McGrath * 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 * 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 * 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 * 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 . * 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 . 1997-08-23 Andreas Schwab * manual/libc.texinfo: Reorder chapters to match logical order. 1997-08-25 12:22 Ulrich Drepper * 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 . * elf/dl-deps.c: Implement handling of DT_FILTER. --- sysdeps/i386/i486/bits/string.h | 853 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 853 insertions(+) create mode 100644 sysdeps/i386/i486/bits/string.h (limited to 'sysdeps/i386/i486') diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h new file mode 100644 index 0000000000..f141bd50e1 --- /dev/null +++ b/sysdeps/i386/i486/bits/string.h @@ -0,0 +1,853 @@ +/* Optimized, inlined string functions. i486 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 directly; include 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_g (dest, src, n))) +#define __memcpy_c(dest, src, n) \ + (((n) % 4 == 0) \ + ? __memcpy_by4 (dest, src, n) \ + : (((n) % 2 == 0) \ + ? __memcpy_by2 (dest, src, n) \ + : __memcpy_g (dest, src, n))) + +__STRING_INLINE void * +__memcpy_by4 (void *__dest, __const void *__src, size_t __n) +{ + register void *__tmp = __dest; + register int __dummy1, __dummy2; + __asm__ __volatile__ + ("1:\n\t" + "movl (%2),%0\n\t" + "leal 4(%2),%2\n\t" + "movl %0,(%1)\n\t" + "leal 4(%1),%1\n\t" + "decl %3\n\t" + "jnz 1b" + : "=r" (__dummy1), "=r" (__tmp), "=r" (__src), "=r" (__dummy2) + : "1" (__tmp), "2" (__src), "3" (__n / 4) + : "memory", "cc"); + return __dest; +} + +__STRING_INLINE void * +__memcpy_by2 (void *__dest, __const void *__src, size_t __n) +{ + register void *__tmp = __dest; + register int __dummy1, __dummy2; + __asm__ __volatile__ + ("shrl $1,%3\n\t" + "jz 2f\n" /* only a word */ + "1:\n\t" + "movl (%2),%0\n\t" + "leal 4(%2),%2\n\t" + "movl %0,(%1)\n\t" + "leal 4(%1),%1\n\t" + "decl %3\n\t" + "jnz 1b\n" + "2:\n\t" + "movw (%2),%w0\n\t" + "movw %w0,(%1)" + : "=q" (__dummy1), "=r" (__tmp), "=r" (__src), "=r" (__dummy2) + : "1" (__tmp), "2" (__src), "3" (__n / 2) + : "memory", "cc"); + return __dest; +} + +__STRING_INLINE void * +__memcpy_g (void *__dest, __const void *__src, size_t __n) +{ + register void *__tmp = __dest; + __asm__ __volatile__ + ("cld\n\t" + "shrl $1,%%ecx\n\t" + "jnc 1f\n\t" + "movsb\n" + "1:\n\t" + "shrl $1,%%ecx\n\t" + "jnc 2f\n\t" + "movsw\n" + "2:\n\t" + "rep; movsl" + : /* no output */ + : "c" (__n), "D" (__tmp),"S" (__src) + : "cx", "di", "si", "memory", "cc"); + return __dest; +} + + +/* 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) +{ + register void *__tmp = __dest; + if (__dest < __src) + __asm__ __volatile__ + ("cld\n\t" + "rep; movsb" + : /* no output */ + : "c" (__n), "S" (__src), "D" (__tmp) + : "cx", "si", "di"); + else + __asm__ __volatile__ + ("std\n\t" + "rep; movsb\n\t" + "cld" + : /* no output */ + : "c" (__n), "S" (__n - 1 + (__const char *) __src), + "D" (__n - 1 + (char *) __tmp) + : "cx", "si", "di", "memory"); + return __dest; +} + + +/* Compare N bytes of S1 and S2. */ +#ifndef __PIC__ +/* gcc has problems to spill registers when using PIC. */ +__STRING_INLINE int +memcmp (__const void *__s1, __const void *__s2, size_t __n) +{ + register int __res; + __asm__ __volatile__ + ("cld\n\t" + "repe; cmpsb\n\t" + "je 1f\n\t" + "sbbl %0,%0\n\t" + "orb $1,%b0\n" + "1:" + : "=a" (__res) + : "0" (0), "S" (__s1), "D" (__s2), "c" (__n) + : "si", "di", "cx", "cc"); + return __res; +} +#endif + + +/* Set N bytes of S to C. */ +#define memset(s, c, n) \ + (__extension__ (__builtin_constant_p (c) \ + ? (__builtin_constant_p (n) \ + ? __memset_cc (s, c, n) \ + : __memset_cg (s, c, n)) \ + : (__builtin_constant_p (n) \ + ? __memset_gc (s, c, n) \ + : __memset_gg (s, c, n)))) +#define __memset_cc(s, c, n) \ + (((n) % 4 == 0) \ + ? __memset_cc_by4 (s, c, n) \ + : (((n) % 2== 0) \ + ? __memset_cc_by2 (s, c, n) \ + : __memset_cg (s, c, n))) +#define __memset_gc(s, c, n) \ + (((n) % 4== 0) \ + ? __memset_gc_by4 (s, c, n) \ + : (((n) % 2 == 0) \ + ? __memset_gc_by2 (s, c, n) \ + : __memset_gg (s, c, n))) + +__STRING_INLINE void * +__memset_cc_by4 (void *__s, int __c, size_t __n) +{ + register char *__tmp = __s; + register int __dummy; + __asm__ __volatile__ + ("1:\n\t" + "movl %2,(%0)\n\t" + "leal 4(%0),%0\n\t" + "decl %1\n\t" + "jnz 1b" + : "=r" (__tmp), "=r" (__dummy) + : "q" (0x01010101UL * (unsigned char) __c), "0" (__tmp), "1" (__n / 4) + : "memory", "cc"); + return __s; +} + +__STRING_INLINE void * +__memset_cc_by2 (void *__s, char __c, size_t __n) +{ + register void *__tmp = __s; + register int __dummy; + __asm__ __volatile__ + ("shrl $1,%1\n\t" /* may be divisible also by 4 */ + "jz 2f\n" + "1:\n\t" + "movl %2,(%0)\n\t" + "leal 4(%0),%0\n\t" + "decl %1\n\t" + "jnz 1b\n" + "2:\n\t" + "movw %w2,(%0)" + : "=r" (__tmp), "=r" (__dummy) + : "q" (0x01010101UL * (unsigned char) __c), "0" (__tmp), "1" (__n / 2) + : "memory", "cc"); + return __s; +} + +__STRING_INLINE void * +__memset_gc_by4 (void *__s, char __c, size_t __n) +{ + register void *__tmp = __s; + register int __dummy; + __asm__ __volatile__ + ("movb %b0,%h0\n" + "pushw %w0\n\t" + "shll $16,%0\n\t" + "popw %w0\n" + "1:\n\t" + "movl %0,(%1)\n\t" + "addl $4,%1\n\t" + "decl %2\n\t" + "jnz 1b\n" + : "=q" (__c), "=r" (__tmp), "=r" (__dummy) + : "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 4) + : "memory", "cc"); + return __s; +} + +__STRING_INLINE void * +__memset_gc_by2 (void *__s, char __c, size_t __n) +{ + register void *__tmp = __s; + register int __dummy1, __dummy2; + __asm__ __volatile__ + ("movb %b0,%h0\n\t" + "shrl $1,%2\n\t" /* may be divisible also by 4 */ + "jz 2f\n\t" + "pushw %w0\n\t" + "shll $16,%0\n\t" + "popw %w0\n" + "1:\n\t" + "movl %0,(%1)\n\t" + "leal 4(%1),%1\n\t" + "decl %2\n\t" + "jnz 1b\n" + "2:\n\t" + "movw %w0,(%1)" + : "=q" (__dummy1), "=r" (__tmp), "=r" (__dummy2) + : "0" ((unsigned int) __c), "1" (__tmp), "2" (__n / 2) + : "memory", "cc"); + return __s; +} + +__STRING_INLINE void * +__memset_cg (void *__s, char __c, size_t __n) +{ + register void *__tmp = __s; + __asm__ __volatile__ + ("shrl $1,%%ecx\n\t" + "rep; stosw\n\t" + "jnc 1f\n\t" + "movb %%al,(%%edi)\n" + "1:" + : /* no output */ + : "c" (__n),"D" (__tmp), "a" (0x0101U * (unsigned char) __c) + : "cx", "di", "memory", "cc"); + return __s; +} + +__STRING_INLINE void * +__memset_gg (void *__s, char __c, size_t __n) +{ + register void *__tmp = __s; + __asm__ __volatile__ + ("movb %%al,%%ah\n\t" + "shrl $1,%%ecx\n\t" + "rep; stosw\n\t" + "jnc 1f\n\t" + "movb %%al,(%%edi)\n" + "1:" + : /* no output */ + : "c" (__n), "D" (__tmp), "a" (__c) + : "cx", "di", "memory", "cc"); + 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 (__n == 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; +} + + +/* Return the length of S. */ +__STRING_INLINE size_t +strlen (__const char *__str) +{ + register char __dummy; + register __const char *__tmp = __str; + __asm__ __volatile__ + ("1:\n\t" + "movb (%0),%1\n\t" + "leal 1(%0),%0\n\t" + "testb %1,%1\n\t" + "jne 1b" + : "=r" (__tmp), "=q" (__dummy) + : "0" (__str) + : "memory", "cc" ); + return __tmp - __str - 1; +} + + +/* Copy SRC to DEST. */ +__STRING_INLINE char * +strcpy (char *__dest, __const char *__src) +{ + register char *__tmp = __dest; + register char __dummy; + __asm__ __volatile__ + ( + "1:\n\t" + "movb (%0),%2\n\t" + "incl %0\n\t" + "movb %2,(%1)\n\t" + "incl %1\n\t" + "testb %2,%2\n\t" + "jne 1b" + : "=r" (__src), "=r" (__tmp), "=q" (__dummy) + : "0" (__src), "1" (__tmp) + : "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) +{ + register char *__tmp = __dest; + register char __dummy; + if (__n > 0) + __asm__ __volatile__ + ("1:\n\t" + "movb (%0),%2\n\t" + "incl %0\n\t" + "movb %2,(%1)\n\t" + "incl %1\n\t" + "decl %3\n\t" + "je 3f\n\t" + "testb %2,%2\n\t" + "jne 1b\n\t" + "2:\n\t" + "movb %2,(%1)\n\t" + "incl %1\n\t" + "decl %3\n\t" + "jne 2b\n\t" + "3:" + : "=r" (__src), "=r" (__tmp), "=q" (__dummy), "=r" (__n) + : "0" (__src), "1" (__tmp), "3" (__n) + : "memory", "cc"); + + return __dest; +} + + +/* Append SRC onto DEST. */ +__STRING_INLINE char * +strcat (char *__dest, __const char *__src) +{ + register char *__tmp = __dest - 1; + register char __dummy; + __asm__ __volatile__ + ( + "1:\n\t" + "incl %1\n\t" + "cmpb $0,(%1)\n\t" + "jne 1b\n" + "2:\n\t" + "movb (%2),%b0\n\t" + "incl %2\n\t" + "movb %b0,(%1)\n\t" + "incl %1\n\t" + "testb %b0,%b0\n\t" + "jne 2b\n" + : "=q" (__dummy), "=r" (__tmp), "=r" (__src) + : "1" (__tmp), "2" (__src) + : "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) +{ + register char *__tmp = __dest - 1; + register char __dummy; + __asm__ __volatile__ + ( + "1:\n\t" + "incl %1\n\t" + "cmpb $0,(%1)\n\t" + "jne 1b\n" + "2:\n\t" + "decl %3\n\t" + "js 3f\n\t" + "movb (%2),%b0\n\t" + "leal 1(%2),%2\n\t" + "movb %b0,(%1)\n\t" + "leal 1(%1),%1\n\t" + "testb %b0,%b0\n\t" + "jne 2b\n" + "3:\n\t" + "movb $0,(%1)\n\t" + : "=q" (__dummy), "=r" (__tmp), "=r" (__src), "=r" (__n) + : "1" (__tmp), "2" (__src), "3" (__n) + : "memory", "cc"); + return __dest; +} + + +/* Compare S1 and S2. */ +__STRING_INLINE int +strcmp (__const char *__s1, __const char *__s2) +{ + register int __res; + __asm__ __volatile__ + ("1:\n\t" + "movb (%1),%b0\n\t" + "leal 1(%1),%1\n\t" + "cmpb %b0,(%2)\n\t" + "jne 2f\n\t" + "leal 1(%2),%2\n\t" + "testb %b0,%b0\n\t" + "jne 1b\n\t" + "xorl %0,%0\n\t" + "jmp 3f\n" + "2:\n\t" + "movl $1,%0\n\t" + "jb 3f\n\t" + "negl %0\n" + "3:" + : "=q" (__res), "=r" (__s1), "=r" (__s2) + : "1" (__s1), "2" (__s2) + : "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__ + ("1:\n\t" + "decl %3\n\t" + "js 2f\n\t" + "movb (%1),%b0\n\t" + "incl %1\n\t" + "cmpb %b0,(%2)\n\t" + "jne 3f\n\t" + "incl %2\n\t" + "testb %b0,%b0\n\t" + "jne 1b\n" + "2:\n\t" + "xorl %0,%0\n\t" + "jmp 4f\n" + "3:\n\t" + "movl $1,%0\n\t" + "jb 4f\n\t" + "negl %0\n" + "4:" + : "=q" (__res), "=r" (__s1), "=r" (__s2), "=r" (__n) + : "1" (__s1), "2" (__s2), "3" (__n) + : "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__ + ("movb %%al,%%ah\n" + "1:\n\t" + "movb (%0),%%al\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "leal 1(%0),%0\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "xorl %0,%0\n" + "2:" + : "=r" (__res) + : "a" (__c), "0" (__s) + : "ax", "cc"); + return __res; +} + +__STRING_INLINE char * +__strchr_c (__const char *__s, int __c) +{ + register char *__res; + __asm__ __volatile__ + ("1:\n\t" + "movb (%0),%%al\n\t" + "cmpb %%ah,%%al\n\t" + "je 2f\n\t" + "leal 1(%0),%0\n\t" + "testb %%al,%%al\n\t" + "jne 1b\n\t" + "xorl %0,%0\n" + "2:" + : "=r" (__res) + : "a" (__c), "0" (__s) + : "ax", "cc"); + return __res; +} + + +/* Find the last occurrence of C in S. */ +#define strrchr(s, c) \ + (__extension__ (__builtin_constant_p (c) \ + ? __strrchr_c (s, ((c) & 0xff) << 8) \ + : __strrchr_g (s, c))) + +__STRING_INLINE char * +__strrchr_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" + "jne 2f\n\t" + "leal -1(%%esi),%0\n" + "2:\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + : "=d" (__res) + : "0" (0), "S" (__s),"a" (__c) + : "ax", "si", "cc"); + return __res; +} + +__STRING_INLINE char * +__strrchr_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" + "jne 2f\n\t" + "leal -1(%%esi),%0\n" + "2:\n\t" + "testb %%al,%%al\n\t" + "jne 1b" + : "=d" (__res) + : "0" (0), "S" (__s),"a" (__c) + : "ax", "si", "cc"); + return __res; +} + + +/* 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__ + ("push %%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 */ -- cgit 1.4.1