From 1d2fc9b3c59d0e83e04139ddf633731264b76ea2 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 5 Jan 2000 02:09:12 +0000 Subject: Redesigned how cancellation unblocks a thread from internal cancellation points (sem_wait, pthread_join, pthread_cond_{wait,timedwait}). Cancellation won't eat a signal in any of these functions (*required* by POSIX and Single Unix Spec!). 2000-01-03 Kaz Kylheku Redesigned how cancellation unblocks a thread from internal cancellation points (sem_wait, pthread_join, pthread_cond_{wait,timedwait}). Cancellation won't eat a signal in any of these functions (*required* by POSIX and Single Unix Spec!). * condvar.c: spontaneous wakeup on pthread_cond_timedwait won't eat a simultaneous condition variable signal (not required by POSIX or Single Unix Spec, but nice). * spinlock.c: __pthread_lock queues back any received restarts that don't belong to it instead of assuming ownership of lock upon any restart; fastlock can no longer be acquired by two threads simultaneously. * restart.h: restarts queue even on kernels that don't have queued real time signals (2.0, early 2.1), thanks to atomic counter, avoiding a rare race condition in pthread_cond_timedwait. --- sysdeps/i386/i686/add_n.S | 104 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 sysdeps/i386/i686/add_n.S (limited to 'sysdeps/i386') diff --git a/sysdeps/i386/i686/add_n.S b/sysdeps/i386/i686/add_n.S new file mode 100644 index 0000000000..5a1339f9f8 --- /dev/null +++ b/sysdeps/i386/i686/add_n.S @@ -0,0 +1,104 @@ +/* Add two limb vectors of the same length > 0 and store sum in a third + limb vector. + Copyright (C) 1992, 94, 95, 97, 98, 2000 Free Software Foundation, Inc. + This file is part of the GNU MP Library. + + The GNU MP 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 MP 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 MP 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. */ + +/* + INPUT PARAMETERS + res_ptr (sp + 4) + s1_ptr (sp + 8) + s2_ptr (sp + 12) + size (sp + 16) +*/ + +#include "sysdep.h" +#include "asm-syntax.h" + + .text +#ifdef PIC +L(1): addl (%esp), %eax + ret +#endif +ENTRY(__mpn_add_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 %ecx,%eax + shrl $3,%ecx /* compute count for unrolled loop */ + negl %eax + andl $7,%eax /* get index where to start loop */ + jz L(oop) /* necessary special case for 0 */ + incl %ecx /* adjust loop count */ + shll $2,%eax /* adjustment for pointers... */ + subl %eax,%edi /* ... since they are offset ... */ + subl %eax,%esi /* ... by a constant when we ... */ + subl %eax,%edx /* ... enter the loop */ + shrl $2,%eax /* restore previous value */ +#ifdef PIC +/* Calculate start address in loop for PIC. */ + leal (L(oop)-L(0)-3)(%eax,%eax,8),%eax + call L(1) +L(0): +#else +/* Calculate start address in loop for non-PIC. */ + leal (L(oop) - 3)(%eax,%eax,8),%eax +#endif + jmp *%eax /* jump into loop */ + ALIGN (3) +L(oop): movl (%esi),%eax + adcl (%edx),%eax + movl %eax,(%edi) + movl 4(%esi),%eax + adcl 4(%edx),%eax + movl %eax,4(%edi) + movl 8(%esi),%eax + adcl 8(%edx),%eax + movl %eax,8(%edi) + movl 12(%esi),%eax + adcl 12(%edx),%eax + movl %eax,12(%edi) + movl 16(%esi),%eax + adcl 16(%edx),%eax + movl %eax,16(%edi) + movl 20(%esi),%eax + adcl 20(%edx),%eax + movl %eax,20(%edi) + movl 24(%esi),%eax + adcl 24(%edx),%eax + movl %eax,24(%edi) + movl 28(%esi),%eax + adcl 28(%edx),%eax + movl %eax,28(%edi) + leal 32(%edi),%edi + leal 32(%esi),%esi + leal 32(%edx),%edx + decl %ecx + jnz L(oop) + + sbbl %eax,%eax + negl %eax + + popl %esi + popl %edi + ret +END(__mpn_add_n) -- cgit 1.4.1