mirror of
git://git.gnupg.org/gnupg.git
synced 2024-10-31 20:08:43 +01:00
81 lines
2.3 KiB
ArmAsm
81 lines
2.3 KiB
ArmAsm
|
/* hppa sub_n -- Sub two limb vectors of the same length > 0 and store
|
||
|
|
* sum in a third limb vector.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1992, 1994, 1998,
|
||
|
|
* 2001 Free Software Foundation, Inc.
|
||
|
|
*
|
||
|
|
* This file is part of GnuPG.
|
||
|
|
*
|
||
|
|
* GnuPG is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* GnuPG 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 General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
||
|
|
*
|
||
|
|
* Note: This code is heavily based on the GNU MP Library.
|
||
|
|
* Actually it's the same code with only minor changes in the
|
||
|
|
* way the data is stored; this is to support the abstraction
|
||
|
|
* of an optional secure memory allocation which may be used
|
||
|
|
* to avoid revealing of sensitive data due to paging etc.
|
||
|
|
* The GNU MP Library itself is published under the LGPL;
|
||
|
|
* however I decided to publish this code under the plain GPL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#include "sysdep.h"
|
||
|
|
#include "asm-syntax.h"
|
||
|
|
|
||
|
|
|
||
|
|
/*******************
|
||
|
|
* mpi_limb_t
|
||
|
|
* mpihelp_sub_n( mpi_ptr_t res_ptr, (gr26)
|
||
|
|
* mpi_ptr_t s1_ptr, (gr25)
|
||
|
|
* mpi_ptr_t s2_ptr, (gr24)
|
||
|
|
* mpi_size_t size) (gr23)
|
||
|
|
*
|
||
|
|
* One might want to unroll this as for other processors, but it turns
|
||
|
|
* out that the data cache contention after a store makes such
|
||
|
|
* unrolling useless. We can't come under 5 cycles/limb anyway.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
.code
|
||
|
|
.export mpihelp_sub_n
|
||
|
|
.label mpihelp_sub_n
|
||
|
|
.proc
|
||
|
|
.callinfo frame=0,no_calls
|
||
|
|
.entry
|
||
|
|
|
||
|
|
ldws,ma 4(0,%r25),%r20
|
||
|
|
ldws,ma 4(0,%r24),%r19
|
||
|
|
|
||
|
|
addib,= -1,%r23,L$end ; check for (SIZE == 1)
|
||
|
|
sub %r20,%r19,%r28 ; subtract first limbs ignoring cy
|
||
|
|
|
||
|
|
.label L$loop
|
||
|
|
ldws,ma 4(0,%r25),%r20
|
||
|
|
ldws,ma 4(0,%r24),%r19
|
||
|
|
stws,ma %r28,4(0,%r26)
|
||
|
|
addib,<> -1,%r23,L$loop
|
||
|
|
subb %r20,%r19,%r28
|
||
|
|
|
||
|
|
.label L$end
|
||
|
|
stws %r28,0(0,%r26)
|
||
|
|
addc %r0,%r0,%r28
|
||
|
|
bv 0(%r2)
|
||
|
|
subi 1,%r28,%r28
|
||
|
|
|
||
|
|
.exit
|
||
|
|
.procend
|
||
|
|
|
||
|
|
|
||
|
|
|