Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>

	* malloc/malloc.c (_malloc_internal): Performance fix.  Move
	if statement out of loop.

	* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite.  Much faster
	implementation using GMP functions.  Contributed by
	Torbjorn Granlund and Ulrich Drepper.

	* stdio/test_rdwr.c: Include <errno.h>.

	* sysdeps/i386/i586/Implies: New file.

	New highly optimized string functions for i[345]86.
	* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
        * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
        * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
        * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
        * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
        * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
        * sysdeps/i386/i586/strlen.S: New file.
	* sysdeps/i386/memchr.c: Removed.  There is now an assembler version.

	* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
	not correspond to used values.

	* sysdeps/unix/sysv/linux/nfs/nfs.h: New file.  Simply a wrapper
        around a kernel header file.
	* sysdeps/unix/sysv/linux/Dist: Add it.
	* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
	Likewise.

	* sysdeps/unix/sysv/linux/local_lim.h: Rewrite.  Instead of
        defining ourself we use a kernel header file.

	* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
        call handler for i586.

	* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
Sat Oct 14 02:52:36 1995  Ulrich Drepper  <drepper@ipd.info.uni-karlsruhe.de>

	* malloc/malloc.c (_malloc_internal): Performance fix.  Move
	if statement out of loop.

	* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite.  Much faster
	implementation using GMP functions.  Contributed by
	Torbjorn Granlund and Ulrich Drepper.

	* stdio/test_rdwr.c: Include <errno.h>.

	* sysdeps/i386/i586/Implies: New file.

	New highly optimized string functions for i[345]86.
	* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
        * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
        * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
        * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
        * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
        * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
        * sysdeps/i386/i586/strlen.S: New file.
	* sysdeps/i386/memchr.c: Removed.  There is now an assembler version.

	* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
	not correspond to used values.

	* sysdeps/unix/sysv/linux/nfs/nfs.h: New file.  Simply a wrapper
        around a kernel header file.
	* sysdeps/unix/sysv/linux/Dist: Add it.
	* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
	Likewise.

	* sysdeps/unix/sysv/linux/local_lim.h: Rewrite.  Instead of
        defining ourself we use a kernel header file.

	* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
        call handler for i586.

	* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.

1 files changed, 176 insertions, 0 deletions

diff --git a/sysdeps/i386/strspn.S b/sysdeps/i386/strspn.S
new file mode 100644
index 0000000000..1a02026285
--- /dev/null
+++ b/sysdeps/i386/strspn.S
@@ -0,0 +1,176 @@
+/* strcspn (str, ss) -- Return the length of the initial segement of STR
+			which contains only characters from SS.
+For Intel 80x86, x>=3.
+Copyright (C) 1994, 1995 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)
+   skipset	(sp + 8)
+*/
+
+	.text
+ENTRY (strspn)
+	movl 4(%esp), %edx	/* get string pointer */
+	movl 8(%esp), %eax	/* get skipset 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 */
+	testb %cl, (%esp,%ecx)	/* is it contained in skipset? */
+	jz L4			/* no => return */
+
+	movb 1(%eax), %cl	/* get byte from string */
+	testb %cl, (%esp,%ecx)	/* is it contained in skipset? */
+	jz L5			/* no => return */
+
+	movb 2(%eax), %cl	/* get byte from string */
+	testb %cl, (%esp,%ecx)	/* is it contained in skipset? */
+	jz L6			/* no => return */
+
+	movb 3(%eax), %cl	/* get byte from string */
+	testb %cl, (%esp,%ecx)	/* is it contained in skipset? */
+	jnz L3			/* yes => start loop again */
+
+	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