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
|
dnl PowerPC-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
dnl the result from a second limb vector.
dnl Copyright 1999-2001, 2003, 2005 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: ?
C POWER4/PPC970: 16
C INPUT PARAMETERS
C rp r3
C up r4
C n r5
C v r6,r7 or r7,r8
ASM_START()
PROLOGUE(mpn_submul_1)
ifdef(`BROKEN_LONGLONG_PARAM',
` rldimi r8, r7, 32,0 C assemble vlimb from separate 32-bit arguments
mr r6, r8
',`
rldimi r7, r6, 32,0 C assemble vlimb from separate 32-bit arguments
mr r6, r7
')
li r7, 0 C cy_limb = 0
mtctr r5
addic r0, r0, 0
addi r3, r3, -8
addi r4, r4, -8
L(oop): ldu r0, 8(r4)
mulld r9, r0, r6
adde r12, r9, r7 C add old high limb and new low limb
srdi r5, r9, 32
srdi r11, r7, 32
adde r5, r5, r11 C add high limb parts, set cy
mulhdu r7, r0, r6
addze r7, r7
ld r10, 8(r3)
subfc r9, r12, r10
srdi r5, r12, 32
srdi r11, r10, 32
subfe r5, r5, r11 C subtract high limb parts, set cy
stdu r9, 8(r3)
subfe r11, r11, r11 C invert ...
addic r11, r11, 1 C ... carry
bdnz L(oop)
addze r4, r7
srdi r3, r4, 32
blr
EPILOGUE()
|
