diff options
| author | Roland McGrath <roland@gnu.org> | 1995-10-16 01:37:51 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-10-16 01:37:51 +0000 |
| commit | 8f5ca04bc7fd53741d80117df992995ace8f6d2d (patch) | |
| tree | e39c13fc198b22ec55647259a8080051988e8c69 /sysdeps/i386/sub_n.S | |
| parent | 5d82cf5c55f56ae10d3b0a205d1fcc7de1cf56a0 (diff) | |
| download | glibc-8f5ca04bc7fd53741d80117df992995ace8f6d2d.tar.gz glibc-8f5ca04bc7fd53741d80117df992995ace8f6d2d.tar.xz glibc-8f5ca04bc7fd53741d80117df992995ace8f6d2d.zip | |
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.
Diffstat (limited to 'sysdeps/i386/sub_n.S')
| -rw-r--r-- | sysdeps/i386/sub_n.S | 26 |
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 |