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
|
dnl PPC64 mpn_bdiv_dbm1c.
dnl Copyright 2008, 2010 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 POWER3/PPC630 6-18
C POWER4/PPC970 8.25
C POWER5 8.5 fluctuating as function of n % 3
C POWER6 15
C POWER7 4.75
C TODO
C * Nothing to do...
C INPUT PARAMETERS
define(`rp', `r3')
define(`up', `r4')
define(`n', `r5')
define(`bd', `r6')
define(`cy', `r7')
ASM_START()
PROLOGUE(mpn_bdiv_dbm1c)
ld r0, 0(r4)
rldicl. r12, r5, 0,62
cmpldi cr6, r12, 2
cmpldi cr7, r5, 4
addi r5, r5, 1
srwi r5, r5, 2
mtctr r5
beq cr0, L(b00)
blt cr6, L(b01)
beq cr6, L(b10)
ALIGN(16)
L(b11): mulld r5, r0, r6
mulhdu r12, r0, r6
ld r0, 8(r4)
addi r4, r4, -24
addi r3, r3, -24
b L(3)
ALIGN(16)
L(b00): mulld r9, r0, r6
mulhdu r8, r0, r6
addi r4, r4, -16
addi r3, r3, -16
b L(0)
ALIGN(16)
L(b01): mulld r5, r0, r6
mulhdu r12, r0, r6
addi r3, r3, -8
ble cr7, L(e1)
ld r0, 8(r4)
addi r4, r4, -8
b L(1)
ALIGN(16)
L(b10): mulld r9, r0, r6
mulhdu r8, r0, r6
ble cr7, L(e2)
ALIGN(16)
L(top): subfc r11, r9, r7
ld r10, 8(r4)
ld r0, 16(r4)
subfe r7, r8, r11
std r11, 0(r3)
mulld r5, r10, r6
mulhdu r12, r10, r6
L(1): mulld r9, r0, r6
mulhdu r8, r0, r6
subfc r11, r5, r7
subfe r7, r12, r11
std r11, 8(r3)
L(0): subfc r11, r9, r7
ld r10, 24(r4)
ld r0, 32(r4)
subfe r7, r8, r11
std r11, 16(r3)
mulld r5, r10, r6
mulhdu r12, r10, r6
L(3): mulld r9, r0, r6
mulhdu r8, r0, r6
subfc r11, r5, r7
subfe r7, r12, r11
std r11, 24(r3)
addi r4, r4, 32
addi r3, r3, 32
bdnz L(top)
L(e2): ld r10, 8(r4)
mulld r5, r10, r6
mulhdu r12, r10, r6
subfc r11, r9, r7
subfe r7, r8, r11
std r11, 0(r3)
L(e1): subfc r11, r5, r7
std r11, 8(r3)
subfe r3, r12, r11
blr
EPILOGUE()
|
