glibc/sysdeps/i386/strcspn.S
Ulrich Drepper 6ed0492f8e update from main archvie 961022
Tue Oct 22 21:38:21 1996  Ulrich Drepper  <drepper@cygnus.com>

	* version.h: Bump version number to 1.97.

	* features.h: Undo change of Sun Oct 20 22:19:58 1996.
	Include libc-version.h.
	* features.h.in: Removed.
	* Makefile: Change rules to generate libc-version.h instead of
	features.h.

	* malloc/free.c: Add cast to prevent warning.
	* malloc/malloc-walk.c: Likewise.
	* malloc/ralloc.c: Likewise.
	* malloc/realloc.c: Likewise.

	* grp/fgetgrent_r.c: Accept empty numeric field if name start with +
	or -.
	* pwd/fgetpwent_r.c: Likewise.
	* nss/nss_files/files-grp.c: Don't accept entries with names starting
	with + or - in lookup functions.
	* nss/nss_files/files-pwd.c: Likewise.

	* Makerules: Call autolock.sh using $(SHELL).

Mon Oct 21 22:52:16 1996  NIIBE Yutaka  <gniibe@mri.co.jp>

	* elf/dl-minimal.c: Don't define `dgettext' replacement but
	`dcgettext'.  When optimizing the macros in <libintl.h> define
	`dgettext' as a macro and so this function will never be called.

Mon Oct 21 15:41:59 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/sysdep.h: Define END to use .size when available.
	(PSEUDO_END): Use END.
	* sysdeps/unix/sysv/linux/i386/sysdep.h: Define PSEUDO_END to
	define SYSCALL_ERROR_HANDLER before using END.
	(SYSCALL_ERROR_HANDLER): Don't use .size directive.
	* sysdeps/unix/sysv/linux/clone.S: Don't use SYSCALL_ERROR_HANDLER
	and .size directive but PSEUDO_END.
	* sysdeps/unix/sysv/linux/mmap.S: Likewise.
	* sysdeps/unix/sysv/linux/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/sysdep.S (__errno_location): Use END.
	* sysdeps/unix/i386/sysdep.S (__syscall_error): Likewise.
	* sysdeps/i386/__longjmp.S: Use END instead of PSEUDO_END.
	* sysdeps/i386/bsd-_setjmp.S: Likewise.
	* sysdeps/i386/bsd-setjmp.S: Likewise.
	* sysdeps/i386/memchr.S: Likewise.
	* sysdeps/i386/memcmp.S: Likewise.
	* sysdeps/i386/setjmp.S: Likewise.
	* sysdeps/i386/stpcpy.S: Likewise.
	* sysdeps/i386/stpncpy.S: Likewise.
	* sysdeps/i386/strchr.S: Likewise.
	* sysdeps/i386/strcspn.S: Likewise.
	* sysdeps/i386/strpbrk.S: Likewise.
	* sysdeps/i386/strrchr.S: Likewise.
	* sysdeps/i386/strspn.S: Likewise.
	* sysdeps/i386/strtok.S: Likewise.
	* sysdeps/i386/i486/strcat.S: Likewise.
	* sysdeps/i386/i486/strlen.S: Likewise.
	* sysdeps/i386/i586/memset.S: Likewise.
	* sysdeps/i386/i586/strchr.S: Likewise.
	* sysdeps/i386/i586/strlen.S: Likewise.

	* sysdeps/i386/strlen.c: De-ANSI-fy.

	* sysdeps/generic/_strerror.c: Undo change of Mon Oct 21 01:32:36 1996.
	Define dgettext if not defined to use dcgettext.
	* sysdeps/mach/_strerror.c: Likewise.

	* sysdeps/unix/sysv/i386/time.S: Add PSEUDO_END to get
 	__syscall_error defined..

Sat Oct 19 12:27:50 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/m68k/mmap.S: Fix braino: CALL_MCOUNT is
	already included in the ENTRY macro.  Remove SYSCALL_ERROR_HANDLER
	now provided by PSEUDO_END.
	* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise.  Use JUMPTARGET.

	* sysdeps/generic/sysdep.h (END): Provide default empty
	definition.
	* sysdeps/unix/sysv/linux/m68k/sysdep.h (END): Redefine to use
	size directive.
	(PSEUDO): Don't include SYSCALL_ERROR_HANDLER.
	(PSEUDO_END): Include it here instead.
	(SYSCALL_ERROR_HANDLER): Remove type directive.
	* sysdeps/m68k/bsd-_setjmp.S: Use END, not PSEUDO_END.
	* sysdeps/m68k/bsd-setjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
	(__syscall_error): Can't use ENTRY macro.

Sat Oct 19 12:13:24 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/syscalls.list (getresuid, setresuid):
	Set caller to EXTRA.

	O_SHLOCK.

Tue Oct 15 14:37:40 1996  Thomas Bushnell, n/BSG  <thomas@gnu.ai.mit.edu>

	* sysdeps/mach/hurd/fcntlbits.h (O_HURD): Add O_EXLOCK and
1996-10-22 23:29:26 +00:00

178 lines
5.0 KiB
ArmAsm

/* strcspn (str, ss) -- Return the length of the initial segement of STR
which contains no characters from SS.
For Intel 80x86, x>=3.
Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>
Bug fixes by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au>
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. */
#include <sysdep.h>
#include "asm-syntax.h"
/*
INPUT PARAMETERS:
str (sp + 4)
stopset (sp + 8)
*/
.text
ENTRY (strcspn)
movl 4(%esp), %edx /* get string pointer */
movl 8(%esp), %eax /* get stopset pointer */
/* First we create a table with flags for all possible characters.
For the ASCII (7bit/8bit) or ISO-8859-X character sets which are
supported by the C string functions we have 256 characters.
Before inserting marks for the stop characters we clear the whole
table. The unrolled form is much faster than a loop. */
xorl %ecx, %ecx /* %ecx = 0 !!! */
pushl %ecx /* make a 256 bytes long block filled with 0 */
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl %ecx
pushl $0 /* These immediate values make the label 2 */
pushl $0 /* to be aligned on a 16 byte boundary to */
pushl $0 /* get a better performance of the loop. */
pushl $0
pushl $0
pushl $0
/* For understanding the following code remember that %ecx == 0 now.
Although all the following instruction only modify %cl we always
have a correct zero-extended 32-bit value in %ecx. */
/* Don't change the "testb $0xff,%%cl" to "testb %%cl,%%cl". We want
longer instructions so that the next loop aligns without adding nops. */
L2: movb (%eax), %cl /* get byte from stopset */
testb %cl, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 1(%eax), %cl /* get byte from stopset */
testb $0xff, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 2(%eax), %cl /* get byte from stopset */
testb $0xff, %cl /* is NUL char? */
jz L1 /* yes => start compare loop */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
movb 3(%eax), %cl /* get byte from stopset */
addl $4, %eax /* increment stopset pointer */
movb %cl, (%esp,%ecx) /* set corresponding byte in stopset table */
testb $0xff, %cl /* is NUL char? */
jnz L2 /* no => process next dword from stopset */
L1: leal -4(%edx), %eax /* prepare loop */
/* We use a neat trick for the following loop. Normally we would
have to test for two termination conditions
1. a character in the stopset was found
and
2. the end of the string was found
But as a sign that the chracter is in the stopset we store its
value in the table. But the value of NUL is NUL so the loop
terminates for NUL in every case. */
L3: addl $4, %eax /* adjust pointer for full loop round */
movb (%eax), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in stopset? */
je L4 /* yes => return */
movb 1(%eax), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in stopset? */
je L5 /* yes => return */
movb 2(%eax), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in stopset? */
je L6 /* yes => return */
movb 3(%eax), %cl /* get byte from string */
cmpb %cl, (%esp,%ecx) /* is it contained in stopset? */
jne L3 /* yes => return */
incl %eax /* adjust pointer */
L6: incl %eax
L5: incl %eax
L4: subl %edx, %eax /* we have to return the number of valid
characters, so compute distance to first
non-valid character */
addl $256, %esp /* remove stopset */
ret
END (strcspn)