2002-06-29 14:15:02 +00:00
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/* hppa lshift
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* optimized for the PA7100, where it runs at 3.25 cycles/limb
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*
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* Copyright (C) 1992, 1994, 1998,
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* 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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2005-05-31 08:39:18 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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2002-06-29 14:15:02 +00:00
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*/
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/*******************
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* mpi_limb_t
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* mpihelp_lshift( mpi_ptr_t wp, (gr26)
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* mpi_ptr_t up, (gr25)
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* mpi_size_t usize, (gr24)
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* unsigned cnt) (gr23)
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*/
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.code
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.export mpihelp_lshift
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.label mpihelp_lshift
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.proc
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.callinfo frame=64,no_calls
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.entry
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sh2add %r24,%r25,%r25
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sh2add %r24,%r26,%r26
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ldws,mb -4(0,%r25),%r22
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subi 32,%r23,%r1
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mtsar %r1
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addib,= -1,%r24,L$0004
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vshd %r0,%r22,%r28 ; compute carry out limb
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ldws,mb -4(0,%r25),%r29
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addib,<= -5,%r24,L$rest
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vshd %r22,%r29,%r20
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.label L$loop
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ldws,mb -4(0,%r25),%r22
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stws,mb %r20,-4(0,%r26)
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vshd %r29,%r22,%r20
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ldws,mb -4(0,%r25),%r29
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stws,mb %r20,-4(0,%r26)
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vshd %r22,%r29,%r20
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ldws,mb -4(0,%r25),%r22
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stws,mb %r20,-4(0,%r26)
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vshd %r29,%r22,%r20
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ldws,mb -4(0,%r25),%r29
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stws,mb %r20,-4(0,%r26)
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addib,> -4,%r24,L$loop
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vshd %r22,%r29,%r20
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.label L$rest
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addib,= 4,%r24,L$end1
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nop
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.label L$eloop
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ldws,mb -4(0,%r25),%r22
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stws,mb %r20,-4(0,%r26)
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addib,<= -1,%r24,L$end2
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vshd %r29,%r22,%r20
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ldws,mb -4(0,%r25),%r29
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stws,mb %r20,-4(0,%r26)
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addib,> -1,%r24,L$eloop
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vshd %r22,%r29,%r20
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.label L$end1
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stws,mb %r20,-4(0,%r26)
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vshd %r29,%r0,%r20
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bv 0(%r2)
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stw %r20,-4(0,%r26)
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.label L$end2
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stws,mb %r20,-4(0,%r26)
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.label L$0004
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vshd %r22,%r0,%r20
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bv 0(%r2)
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stw %r20,-4(0,%r26)
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.exit
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.procend
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