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/* hppa rshift, lshift
* optimized for the PA7100, where is runs at 3.25 cycles/limb
* Copyright (C) 1992, 1994 Free Software Foundation, Inc.
* Copyright (c) 1997 by Werner Koch (dd9jn)
*
* This file is part of G10.
*
* G10 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.
*
* G10 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.
*/
/*******************
* mpi_limb_t
* mpihelp_lshift( mpi_ptr_t wp, (gr26)
* mpi_ptr_t up, (gr25)
* mpi_size_t usize, (gr24)
* unsigned cnt) (gr23)
*/
.code
.export mpihelp_lshift
mpihelp_lshift
.proc
.callinfo frame=64,no_calls
.entry
sh2add %r24,%r25,%r25
sh2add %r24,%r26,%r26
ldws,mb -4(0,%r25),%r22
subi 32,%r23,%r1
mtsar %r1
addib,= -1,%r24,L$0004
vshd %r0,%r22,%r28 ; compute carry out limb
ldws,mb -4(0,%r25),%r29
addib,<= -5,%r24,L$rest
vshd %r22,%r29,%r20
L$loop ldws,mb -4(0,%r25),%r22
stws,mb %r20,-4(0,%r26)
vshd %r29,%r22,%r20
ldws,mb -4(0,%r25),%r29
stws,mb %r20,-4(0,%r26)
vshd %r22,%r29,%r20
ldws,mb -4(0,%r25),%r22
stws,mb %r20,-4(0,%r26)
vshd %r29,%r22,%r20
ldws,mb -4(0,%r25),%r29
stws,mb %r20,-4(0,%r26)
addib,> -4,%r24,L$loop
vshd %r22,%r29,%r20
L$rest addib,= 4,%r24,L$end1
nop
L$eloop ldws,mb -4(0,%r25),%r22
stws,mb %r20,-4(0,%r26)
addib,<= -1,%r24,L$end2
vshd %r29,%r22,%r20
ldws,mb -4(0,%r25),%r29
stws,mb %r20,-4(0,%r26)
addib,> -1,%r24,L$eloop
vshd %r22,%r29,%r20
L$end1 stws,mb %r20,-4(0,%r26)
vshd %r29,%r0,%r20
bv 0(%r2)
stw %r20,-4(0,%r26)
L$end2 stws,mb %r20,-4(0,%r26)
L$0004 vshd %r22,%r0,%r20
bv 0(%r2)
stw %r20,-4(0,%r26)
.exit
.procend
/*******************
* mpi_limb_t
* mpihelp_rshift( mpi_ptr_t wp, (gr26)
* mpi_ptr_t up, (gr25)
* mpi_size_t usize, (gr24)
* unsigned cnt) (gr23)
*/
.code
.export mpihelp_rshift
mpihelp_rshift
.proc
.callinfo frame=64,no_calls
.entry
ldws,ma 4(0,%r25),%r22
mtsar %r23
addib,= -1,%r24,L$r004
vshd %r22,%r0,%r28 ; compute carry out limb
ldws,ma 4(0,%r25),%r29
addib,<= -5,%r24,L$rrest
vshd %r29,%r22,%r20
L$roop ldws,ma 4(0,%r25),%r22
stws,ma %r20,4(0,%r26)
vshd %r22,%r29,%r20
ldws,ma 4(0,%r25),%r29
stws,ma %r20,4(0,%r26)
vshd %r29,%r22,%r20
ldws,ma 4(0,%r25),%r22
stws,ma %r20,4(0,%r26)
vshd %r22,%r29,%r20
ldws,ma 4(0,%r25),%r29
stws,ma %r20,4(0,%r26)
addib,> -4,%r24,L$roop
vshd %r29,%r22,%r20
L$rrest addib,= 4,%r24,L$rend1
nop
L$eroop ldws,ma 4(0,%r25),%r22
stws,ma %r20,4(0,%r26)
addib,<= -1,%r24,L$rend2
vshd %r22,%r29,%r20
ldws,ma 4(0,%r25),%r29
stws,ma %r20,4(0,%r26)
addib,> -1,%r24,L$eroop
vshd %r29,%r22,%r20
L$rend1 stws,ma %r20,4(0,%r26)
vshd %r0,%r29,%r20
bv 0(%r2)
stw %r20,0(0,%r26)
L$rend2 stws,ma %r20,4(0,%r26)
L$r004 vshd %r0,%r22,%r20
bv 0(%r2)
stw %r20,0(0,%r26)
.exit
.procend
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