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, 15 insertions, 11 deletions

diff --git a/sysdeps/i386/sub_n.S b/sysdeps/i386/sub_n.S
index 64d2c25293..e18a70885b 100644
--- a/sysdeps/i386/sub_n.S
+++ b/sysdeps/i386/sub_n.S
@@ -1,7 +1,7 @@
 /* i80386 __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
    sum in a third limb vector.
 
-Copyright (C) 1992, 1994 Free Software Foundation, Inc.
+Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.
 
 This file is part of the GNU MP Library.
 
@@ -37,10 +37,10 @@ C_SYMBOL_NAME(__mpn_sub_n:)
 	pushl %edi
 	pushl %esi
 
-	movl 12(%esp),%edi	/* res_ptr */
-	movl 16(%esp),%esi	/* s1_ptr */
-	movl 20(%esp),%edx	/* s2_ptr */
-	movl 24(%esp),%ecx	/* size */
+	movl 12(%esp),%edi		/* res_ptr */
+	movl 16(%esp),%esi		/* s1_ptr */
+	movl 20(%esp),%edx		/* s2_ptr */
+	movl 24(%esp),%ecx		/* size */
 
 	movl	%ecx,%eax
 	shrl	$3,%ecx			/* compute count for unrolled loop */
@@ -54,14 +54,18 @@ C_SYMBOL_NAME(__mpn_sub_n:)
 	subl	%eax,%edx		/* ... enter the loop */
 	shrl	$2,%eax			/* restore previous value */
 #ifdef PIC
-	call	here
-here:	leal	(Loop - 3 - here)(%eax,%eax,8),%eax
-	addl	%eax,(%esp)
-	ret
+/* Calculate start address in loop for PIC.  Due to limitations in some
+   assemblers, Loop-L0-3 cannot be put into the leal */
+	call	L0
+L0:	leal	(%eax,%eax,8),%eax
+	addl	(%esp),%eax
+	addl	$(Loop-L0-3),%eax 
+	addl	$4,%esp
 #else
-	leal	(Loop - 3)(%eax,%eax,8),%eax	/* calc start addr in loop */
-	jmp	*%eax			/* jump into loop */
+/* Calculate start address in loop for non-PIC.  */
+ 	leal	(Loop - 3)(%eax,%eax,8),%eax
 #endif
+	jmp	*%eax			/* jump into loop */
 	ALIGN (3)
 Loop:	movl	(%esi),%eax
 	sbbl	(%edx),%eax