1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
dnl HP-PA 2.0 mpn_rshift -- Right shift.
dnl Copyright 1997, 2000, 2002, 2003 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 2.1 of the License, or (at
dnl your option) any later version.
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write
dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
dnl Boston, MA 02110-1301, USA.
dnl This runs at 1.5 cycles/limb on PA8000 and 1.0 cycles/limb on PA8500.
include(`../config.m4')
dnl INPUT PARAMETERS
define(`rp',`%r26')
define(`up',`%r25')
define(`n',`%r24')
define(`cnt',`%r23')
ifdef(`HAVE_ABI_2_0w',
` .level 2.0w
',` .level 2.0
')
PROLOGUE(mpn_rshift)
mtsar cnt
ldd 0(up), %r21
addib,= -1, n, L(end)
shrpd %r21, %r0, %sar, %r29 C compute carry out limb
depw,z n, 31, 3, %r28 C r28 = (size & 7)
sub %r0, n, %r22
depw,z %r22, 28, 3, %r22 C r22 = 8 * (-size & 7)
sub up, %r22, up C offset up
blr %r28, %r0 C branch into jump table
sub rp, %r22, rp C offset rp
b L(0)
nop
b L(1)
copy %r21, %r20
b L(2)
nop
b L(3)
copy %r21, %r20
b L(4)
nop
b L(5)
copy %r21, %r20
b L(6)
nop
b L(7)
copy %r21, %r20
LDEF(loop)
LDEF(0) ldd 8(up), %r20
shrpd %r20, %r21, %sar, %r21
std %r21, 0(rp)
LDEF(7) ldd 16(up), %r21
shrpd %r21, %r20, %sar, %r20
std %r20, 8(rp)
LDEF(6) ldd 24(up), %r20
shrpd %r20, %r21, %sar, %r21
std %r21, 16(rp)
LDEF(5) ldd 32(up), %r21
shrpd %r21, %r20, %sar, %r20
std %r20, 24(rp)
LDEF(4) ldd 40(up), %r20
shrpd %r20, %r21, %sar, %r21
std %r21, 32(rp)
LDEF(3) ldd 48(up), %r21
shrpd %r21, %r20, %sar, %r20
std %r20, 40(rp)
LDEF(2) ldd 56(up), %r20
shrpd %r20, %r21, %sar, %r21
std %r21, 48(rp)
LDEF(1) ldd 64(up), %r21
ldo 64(up), up
shrpd %r21, %r20, %sar, %r20
std %r20, 56(rp)
addib,> -8, n, L(loop)
ldo 64(rp), rp
LDEF(end)
shrpd %r0, %r21, %sar, %r21
std %r21, 0(rp)
bve (%r2)
ifdef(`HAVE_ABI_2_0w',
` copy %r29,%r28
',` extrd,u %r29, 31, 32, %r28
')
EPILOGUE(mpn_rshift)
|
