1 # IBM POWER __mpn_lshift --
3 # Copyright (C) 1992, 1994 Free Software Foundation, Inc.
5 # This file is part of the GNU MP Library.
7 # The GNU MP Library is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU Library General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or (at your
10 # option) any later version.
12 # The GNU MP Library is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
15 # License for more details.
17 # You should have received a copy of the GNU Library General Public License
18 # along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19 # the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 .extern __mpn_lshift[DS]
35 .csect __mpn_lshift[DS]
37 .long .__mpn_lshift, TOC[tc0], 0
44 mtctr 5 # put limb count in CTR loop register
45 lu 0,-4(4) # read most significant limb
46 sre 3,0,8 # compute carry out limb, and init MQ register
47 bdz Lend2
# if just one limb, skip loop
48 lu 0,-4(4) # read 2:nd most significant limb
49 sreq 7,0,8 # compute most significant limb of result
50 bdz Lend
# if just two limb, skip loop
51 Loop
: lu 0,-4(4) # load next lower limb
52 stu 7,-4(9) # store previous result during read latency
53 sreq 7,0,8 # compute result limb
54 bdn Loop
# loop back until CTR is zero
55 Lend
: stu 7,-4(9) # store 2:nd least significant limb
56 Lend2
: sle 7,0,6 # compute least significant limb
57 st 7,-4(9) # store it" \