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lshift.asm revision 1.1
      1 dnl  HP-PA  mpn_lshift -- Shift a number left.
      2 
      3 dnl  Copyright 1992, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
      4 
      5 dnl  This file is part of the GNU MP Library.
      6 
      7 dnl  The GNU MP Library is free software; you can redistribute it and/or modify
      8 dnl  it under the terms of the GNU Lesser General Public License as published
      9 dnl  by the Free Software Foundation; either version 3 of the License, or (at
     10 dnl  your option) any later version.
     11 
     12 dnl  The GNU MP Library is distributed in the hope that it will be useful, but
     13 dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     14 dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     15 dnl  License for more details.
     16 
     17 dnl  You should have received a copy of the GNU Lesser General Public License
     18 dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
     19 
     20 include(`../config.m4')
     21 
     22 C INPUT PARAMETERS
     23 C res_ptr	gr26
     24 C s_ptr		gr25
     25 C size		gr24
     26 C cnt		gr23
     27 
     28 ASM_START()
     29 PROLOGUE(mpn_lshift)
     30 	sh2add		%r24,%r25,%r25
     31 	sh2add		%r24,%r26,%r26
     32 	ldws,mb		-4(0,%r25),%r22
     33 	subi		32,%r23,%r1
     34 	mtsar		%r1
     35 	addib,=		-1,%r24,L(0004)
     36 	vshd		%r0,%r22,%r28		C compute carry out limb
     37 	ldws,mb		-4(0,%r25),%r29
     38 	addib,=		-1,%r24,L(0002)
     39 	vshd		%r22,%r29,%r20
     40 
     41 LDEF(loop)
     42 	ldws,mb		-4(0,%r25),%r22
     43 	stws,mb		%r20,-4(0,%r26)
     44 	addib,=		-1,%r24,L(0003)
     45 	vshd		%r29,%r22,%r20
     46 	ldws,mb		-4(0,%r25),%r29
     47 	stws,mb		%r20,-4(0,%r26)
     48 	addib,<>	-1,%r24,L(loop)
     49 	vshd		%r22,%r29,%r20
     50 
     51 LDEF(0002)
     52 	stws,mb		%r20,-4(0,%r26)
     53 	vshd		%r29,%r0,%r20
     54 	bv		0(%r2)
     55 	stw		%r20,-4(0,%r26)
     56 
     57 LDEF(0003)
     58 	stws,mb		%r20,-4(0,%r26)
     59 
     60 LDEF(0004)
     61 	vshd		%r22,%r0,%r20
     62 	bv		0(%r2)
     63 	stw		%r20,-4(0,%r26)
     64 EPILOGUE()
     65