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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
dnl SPARC v9 mpn_rshift
dnl Contributed to the GNU project by David Miller.
dnl Copyright 2013 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
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 General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C UltraSPARC 1&2: 2
C UltraSPARC 3: 2.5
C UltraSPARC T1: 17.5
C UltraSPARC T3: 8
C UltraSPARC T4: 3
C INPUT PARAMETERS
define(`rp', `%i0')
define(`up', `%i1')
define(`n', `%i2')
define(`cnt', `%i3')
define(`tcnt', `%i4')
define(`retval', `%i5')
define(`u0', `%l0')
define(`u1', `%l1')
define(`r0', `%l6')
define(`r1', `%l7')
define(`u0_off', `%o0')
define(`u1_off', `%o1')
define(`r0_off', `%o2')
define(`r1_off', `%o3')
ASM_START()
REGISTER(%g2,#scratch)
REGISTER(%g3,#scratch)
PROLOGUE(mpn_rshift)
save %sp, -176, %sp
sllx n, 3, n
sub %g0, cnt, tcnt
add up, n, up
add rp, n, rp
neg n, n
sub up, (2 * 8), u0_off
sub rp, (5 * 8), r0_off
ldx [n + up], u1 C WAS: up + 0
sub u0_off, (1 * 8), u1_off
sub r0_off, (1 * 8), r1_off
subcc n, -(3 * 8), n
sllx u1, tcnt, retval
bg,pn %xcc, L(end12)
srlx u1, cnt, %l3
ldx [n + u0_off], u0 C WAS: up + 0
subcc n, -(2 * 8), n
ldx [n + u1_off], u1 C WAS: up + 8
bg,pn %xcc, L(end34)
sllx u0, tcnt, %l4
b,a L(top)
ALIGN(16)
L(top):
srlx u0, cnt, %l2
or %l3, %l4, r0
ldx [n + u0_off], u0 C WAS: up + 0
sllx u1, tcnt, %l5
stx r0, [n + r0_off] C WAS: rp + 0
subcc n, -(2 * 8), n
srlx u1, cnt, %l3
or %l2, %l5, r1
ldx [n + u1_off], u1 C WAS: up + 8
sllx u0, tcnt, %l4
ble,pt %xcc, L(top)
stx r1, [n + r1_off] C WAS: rp + 8
L(end34):
srlx u0, cnt, %l2
or %l3, %l4, r0
sllx u1, tcnt, %l5
stx r0, [n + r0_off] C WAS: rp + 0
or %l2, %l5, r1
sub n, -(2 * 8), %o5
srlx u1, cnt, %l3
stx r1, [%o5 + r1_off] C WAS: rp + 8
L(end12):
andcc n, 8, %g0
bz,pn %xcc, L(done)
nop
ldx [n + u0_off], u1
sllx u1, tcnt, %l4
or %l3, %l4, r0
stx r0, [r0_off + 24]
srlx u1, cnt, %l3
L(done):
stx %l3, [r0_off + 32]
ret
restore retval, 0, %o0
EPILOGUE()
|
