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authorRoland McGrath <roland@gnu.org>1996-05-26 19:19:51 +0000
committerRoland McGrath <roland@gnu.org>1996-05-26 19:19:51 +0000
commit59dd864187ee61b6f0bfd7abc85e2fea4b479cb7 (patch)
treee935d6f39bffe914520946c22a89e11180ba4745 /sysdeps/i386/strtok.S
parent27a110706b570569049e6702f99670e3064e53c1 (diff)
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Sun May 26 15:15:08 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* stdlib/ldiv.c: Deansideclized. Sun May 26 19:39:53 1996 Ulrich Drepper <drepper@cygnus.com> * intl/loadmsgcat.c (_nl_load_domain): Test correct variable after malloc. * string/Makefile (tester-ENV): New variable to suppress message translation in test. * string/tester.c: Add tests for strtok_r and strsep. * sysdeps/i386/i486/strcat.S: Correct some more 8bit operation <-> 32 bit operand conflicts. * sysdeps/i386/strsep.S: Wrapper around <sysdeps/i386/strtok.S> to produce strsep function. * sysdeps/i386/strtok.S: Optimized implementation of strtok function. * sysdeps/i386/strtok_r.S: Wrapper around <sysdeps/i386/strtok.S> to produce strtok_r function. * sysdeps/generic/strtok.c: Moved here from string/strtok.c. Corrected example in comment. * string/Makefile (routines): Add strtok_r. * sysdeps/generic/strtok_r.c: New file. Implement reentrant version of strtok_r. * string/string.h: Add prototype for strtok_r. * wcsmbs/wcstok.c: Handle illegal SAVE_PTR argument the same as in strtok_r. Sun May 26 13:28:23 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * time/tzset.c (__tzset): Ignore leading : in $TZ; always try tzfile first and fall back to 1003.1 syntax only if it fails. * time/Makefile (install-others): Also install posix/ZONE and right/ZONE for each ZONE in $(zonenames). (z.% rule): Generate rules for right/ZONE and posix/ZONE targets too, the difference begin leapseconds vs /dev/null as 3rd dep. For original ZONE targets use $(leapseconds), to be set in Makeconfig. (target-zone-flavor): New variable. (tzcompile): Use it to get the right -d for posix/ and right/ flavors. * Makeconfig (leapseconds): New variable. * mach/Machrules (%.udeps rule): Depend on Machrules. Emit deps for .uh and .__h files. (%.uh, %.__h rules): Don't depend on %.defs; use #include <$*.defs> instead. Sun May 26 01:06:47 1996 Ulrich Drepper <drepper@cygnus.com> * stdlib/Makefile (routines): Add llabs, lldiv. * stdlib/llabs.c: New file. Implementation of return absolute value of long long argument. * stdlib/lldiv.c: New file. Implementation of division with remainder of long long argument. * stdlib/stdlib.h [__USE_GNU] (lldiv_t): New type for lldiv function. Define prototypes for lldiv and llabs functions. * locale/C-collate.c: Initialize _NL_COLLATE_NRULES element. * stdlib/strtod.c: Replace wchar_t with wint_t. The later is really the type for a single wide character. * string/strxfrm.c (print_val): Define separate version for use as wcsxfrm. Here we don't need UTF8 encoding. * wcsmbs/wchar.h: gcc-2.7.2-960517 finally introduces wint_t in <stddef.h>. Use this value and only for older gcc version define in place. (uwchar_t): Remove definition. * wcsmbs/wcscmp.c, wcsmbs/wcscoll.c, wcsmbs/wcsncmp.c, wcsmbs/wcsxfrm.c, wcsmbs/wmemcmp.c: : Don't use uwchar_t as unsigned type. wint_t is intended for this. Sat May 25 14:10:19 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * sysdeps/unix/bsd/direntry.h: Use [1] instead of [0] for d_name to quiet -ansi -pedantic. * sysdeps/unix/common/direntry.h: Likewise. * login/Makefile (headers): Add lastlog.h. * login/lastlog.h: New file. * login/Makefile (CFLAGS): Don't append -D_THREAD_SAFE. * login/utmp.h [_REENTRANT || _THREAD_SAFE]: Replace this conditional with #ifdef __USE_REENTRANT. * features.h (__GNU_LIBRARY__): Set to 6. [_GNU_SOURCE] (_POSIX_SOURCE, _POSIX_C_SOURCE, _BSD_SOURCE, _SVID_SOURCE): Make sure they are all defined. * sysdeps/unix/sysv/linux/gnu/types.h: Instead of including <linux/posix_types.h>, define _LINUX_TYPES_DONT_EXPORT and then include <linux/types.h>. * resource/sys/resource.h: Remove trailing commas from enums. * sysdeps/generic/netinet/in.h: Remove trailing commas from enums. * sysdeps/unix/sysv/linux/netinet/in.h: Likewise.
Diffstat (limited to 'sysdeps/i386/strtok.S')
-rw-r--r--sysdeps/i386/strtok.S329
1 files changed, 329 insertions, 0 deletions
diff --git a/sysdeps/i386/strtok.S b/sysdeps/i386/strtok.S
new file mode 100644
index 0000000000..28845e08cf
--- /dev/null
+++ b/sysdeps/i386/strtok.S
@@ -0,0 +1,329 @@
+/* strtok (str, delim) -- Return next DELIM separated token from STR.
+For Intel 80x86, x>=3.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+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 <errnos.h>
+#include <sysdep.h>
+
+/* This file can be used for three variants of the strtok function:
+
+ strtok:
+ INPUT PARAMETER:
+ str (sp + 4)
+ delim (sp + 8)
+
+ strtok_r:
+ INPUT PARAMETER:
+ str (sp + 4)
+ delim (sp + 8)
+ save_ptr (sp + 12)
+
+ strsep:
+ INPUT PARAMETERS
+ str_ptr (sp + 4)
+ delim (sp + 8)
+
+ We do a common implementation here. */
+
+#if !defined (USE_AS_STRTOK_R) && !defined (USE_AS_STRSEP)
+ .bss
+ .local save_ptr
+ ASM_TYPE_DIRECTIVE (save_ptr, @object)
+ .size save_ptr, 4
+save_ptr:
+ .space 4
+
+#define FUNCTION strtok
+#endif
+
+ /* We use the possibility to do some more initialization
+ for the strtok implementation. */
+ .text
+Lillegal_argument:
+#ifndef PIC
+ movl $EINVAL, C_SYMBOL_NAME(errno)
+ xorl %eax, %eax
+#else
+# if defined (USE_AS_STRTOK_R) || defined (USE_AS_STRSEP)
+ pushl %ebx /* Save PIC register. */
+ call Lhere2
+Lhere2: popl %ebx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere2], %ebx
+# endif
+ movl errno@GOT(%ebx), %ebx
+ movl $EINVAL, (%ebx)
+ xorl %eax, %eax
+ popl %ebx
+#endif
+ ret
+
+
+ENTRY (FUNCTION)
+
+ movl 4(%esp), %edx /* Get start of string. */
+ movl 8(%esp), %eax /* Get start of delimiter set. */
+
+#ifdef USE_AS_STRSEP
+ /* %EDX does not yet contain the string starting point. Only
+ a pointer to the location where it is stored. */
+ movl (%edx), %edx
+#else
+# if !defined (USE_AS_STRTOK_R) && defined (PIC)
+ pushl %ebx /* Save PIC register. */
+ call Lhere
+Lhere: popl %ebx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-Lhere], %ebx
+# endif
+
+ /* If the pointer is NULL we have to use the stored value of
+ the last run. */
+ cmpl $0, %edx
+ jne L0
+
+# ifdef USE_AS_STRTOK_R
+ /* The value is stored in the third argument. */
+ movl 12(%esp), %edx
+ movl (%edx), %edx
+# else
+ /* The value is in the local variable defined above. But
+ we have to take care for PIC code. */
+# ifndef PIC
+ movl save_ptr, %edx
+# else
+ movl save_ptr@GOTOFF(%ebx), %edx
+# endif
+# endif
+#endif
+
+ /* Compare whether pointer is NULL. We are tolerant here
+ because the C function do the same. */
+ cmpl $0, %edx
+ je Lillegal_argument
+
+#ifndef USE_AS_STRSEP
+L0:
+#endif
+ /* 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. */
+
+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 */
+ testb %cl, (%esp,%ecx) /* is it contained in stopset? */
+ jz L4 /* no => start of token */
+
+ movb 1(%eax), %cl /* get byte from string */
+ testb %cl, (%esp,%ecx) /* is it contained in stopset? */
+ jz L5 /* no => start of token */
+
+ movb 2(%eax), %cl /* get byte from string */
+ testb %cl, (%esp,%ecx) /* is it contained in stopset? */
+ jz L6 /* no => start of token */
+
+ movb 3(%eax), %cl /* get byte from string */
+ testb %cl, (%esp,%ecx) /* is it contained in stopset? */
+ jnz L3 /* yes => start of loop */
+
+ incl %eax /* adjust pointer */
+L6: incl %eax
+L5: incl %eax
+
+ /* Now we have to terminate the string. */
+
+L4: leal -4(%eax), %edx /* We use %EDX for the next run. */
+
+L7: addl $4, %edx /* adjust pointer for full loop round */
+
+ movb (%edx), %cl /* get byte from string */
+ cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
+ je L8 /* yes => return */
+
+ movb 1(%edx), %cl /* get byte from string */
+ cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
+ je L9 /* yes => return */
+
+ movb 2(%edx), %cl /* get byte from string */
+ cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
+ je L10 /* yes => return */
+
+ movb 3(%edx), %cl /* get byte from string */
+ cmpb %cl, (%esp,%ecx) /* is it contained in skipset? */
+ jne L7 /* no => start loop again */
+
+ incl %edx /* adjust pointer */
+L10: incl %edx
+L9: incl %edx
+
+L8: /* Remove the stopset table. */
+ addl $256, %esp
+
+ cmpl %eax, %edx
+ je LreturnNULL /* There was no token anymore. */
+
+ movb $0, (%edx) /* Terminate string. */
+
+ /* Are we at end of string? */
+ cmpb $0, %cl
+ je L11
+
+ incl %edx
+L11:
+
+ /* Store the pointer to the next character. */
+#ifdef USE_AS_STRTOK_R
+ movl 12(%esp), %ecx
+ movl %edx, (%ecx)
+#elif USE_AS_STRSEP
+ movl 4(%esp), %ecx
+ movl %edx, (%ecx)
+#else
+# ifndef PIC
+ movl %edx, save_ptr
+# else
+ movl %edx, save_ptr@GOTOFF(%ebx)
+ popl %ebx
+# endif
+#endif
+ ret
+
+LreturnNULL:
+ xorl %eax, %eax
+
+ /* Store NULL as pointer to the next character. */
+#ifdef USE_AS_STRTOK_R
+ movl 12(%esp), %ecx
+ movl %eax, (%ecx)
+#elif USE_AS_STRSEP
+ movl 4(%esp), %ecx
+ movl %eax, (%ecx)
+#else
+# ifndef PIC
+ movl %eax, save_ptr
+# else
+ movl %eax, save_ptr@GOTOFF(%ebx)
+ popl %ebx
+# endif
+#endif
+ ret