1 dnl IBM POWER mpn_lshift
-- Shift a number left.
3 dnl Copyright
1992, 1994, 1999-2001 Free Software Foundation
, Inc.
5 dnl
This file is part of the GNU MP Library.
7 dnl The GNU MP Library is free software
; you can redistribute it and/or modify
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either:
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* the GNU Lesser General
Public License as published by the Free
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; either version 3 of the License, or (at your
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) any later version.
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* the GNU General
Public License as published by the Free Software
17 dnl Foundation
; either version 2 of the License, or (at your option) any
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or both
in parallel
, as here.
22 dnl The GNU MP Library is distributed
in the hope that it will be useful
, but
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; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License
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Public License
and the
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Public License along with the GNU MP Library. If
not,
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https://www.gnu.
org/licenses
/.
38 include(`..
/config.m4
')
46 mtctr 5 C put limb count in CTR loop register
47 lu 0,-4(4) C read most significant limb
48 sre 3,0,8 C compute carry out limb, and init MQ register
49 bdz Lend2 C if just one limb, skip loop
50 lu 0,-4(4) C read 2:nd most significant limb
51 sreq 7,0,8 C compute most significant limb of result
52 bdz Lend C if just two limb, skip loop
53 Loop: lu 0,-4(4) C load next lower limb
54 stu 7,-4(9) C store previous result during read latency
55 sreq 7,0,8 C compute result limb
56 bdn Loop C loop back until CTR is zero
57 Lend: stu 7,-4(9) C store 2:nd least significant limb
58 Lend2: sle 7,0,6 C compute least significant limb