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1 # Alpha 21064 __udiv_qrnnd
2
3 # Copyright (C) 1992-2019 Free Software Foundation, Inc.
4
5 # This file is part of the GNU MP Library.
6
7 # The GNU MP Library is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU Lesser General Public License as published by
9 # the Free Software Foundation; either version 2.1 of the License, or (at your
10 # option) any later version.
11
12 # The GNU MP Library is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 # License for more details.
16
17 # You should have received a copy of the GNU Lesser General Public License
18 # along with the GNU MP Library. If not, see <http://www.gnu.org/licenses/>.
19
20#include <sysdep.h>
21
22 .set noreorder
23 .set noat
24
25 .text
26
27LEAF(__udiv_qrnnd, 0)
28#ifdef PROF
29 ldgp gp, 0(pv)
30 lda AT, _mcount
31 jsr AT, (AT), _mcount
32 .prologue 1
33#else
34 .prologue 0
35#endif
36
37#define cnt $2
38#define tmp $3
39#define rem_ptr $16
40#define n1 $17
41#define n0 $18
42#define d $19
43#define qb $20
44
45 ldiq cnt,16
46 blt d,$largedivisor
47
48$loop1: cmplt n0,0,tmp
49 addq n1,n1,n1
50 bis n1,tmp,n1
51 addq n0,n0,n0
52 cmpule d,n1,qb
53 subq n1,d,tmp
54 cmovne qb,tmp,n1
55 bis n0,qb,n0
56 cmplt n0,0,tmp
57 addq n1,n1,n1
58 bis n1,tmp,n1
59 addq n0,n0,n0
60 cmpule d,n1,qb
61 subq n1,d,tmp
62 cmovne qb,tmp,n1
63 bis n0,qb,n0
64 cmplt n0,0,tmp
65 addq n1,n1,n1
66 bis n1,tmp,n1
67 addq n0,n0,n0
68 cmpule d,n1,qb
69 subq n1,d,tmp
70 cmovne qb,tmp,n1
71 bis n0,qb,n0
72 cmplt n0,0,tmp
73 addq n1,n1,n1
74 bis n1,tmp,n1
75 addq n0,n0,n0
76 cmpule d,n1,qb
77 subq n1,d,tmp
78 cmovne qb,tmp,n1
79 bis n0,qb,n0
80 subq cnt,1,cnt
81 bgt cnt,$loop1
82 stq n1,0(rem_ptr)
83 bis $31,n0,$0
84 ret $31,($26),1
85
86$largedivisor:
87 and n0,1,$4
88
89 srl n0,1,n0
90 sll n1,63,tmp
91 or tmp,n0,n0
92 srl n1,1,n1
93
94 and d,1,$6
95 srl d,1,$5
96 addq $5,$6,$5
97
98$loop2: cmplt n0,0,tmp
99 addq n1,n1,n1
100 bis n1,tmp,n1
101 addq n0,n0,n0
102 cmpule $5,n1,qb
103 subq n1,$5,tmp
104 cmovne qb,tmp,n1
105 bis n0,qb,n0
106 cmplt n0,0,tmp
107 addq n1,n1,n1
108 bis n1,tmp,n1
109 addq n0,n0,n0
110 cmpule $5,n1,qb
111 subq n1,$5,tmp
112 cmovne qb,tmp,n1
113 bis n0,qb,n0
114 cmplt n0,0,tmp
115 addq n1,n1,n1
116 bis n1,tmp,n1
117 addq n0,n0,n0
118 cmpule $5,n1,qb
119 subq n1,$5,tmp
120 cmovne qb,tmp,n1
121 bis n0,qb,n0
122 cmplt n0,0,tmp
123 addq n1,n1,n1
124 bis n1,tmp,n1
125 addq n0,n0,n0
126 cmpule $5,n1,qb
127 subq n1,$5,tmp
128 cmovne qb,tmp,n1
129 bis n0,qb,n0
130 subq cnt,1,cnt
131 bgt cnt,$loop2
132
133 addq n1,n1,n1
134 addq $4,n1,n1
135 bne $6,$Odd
136 stq n1,0(rem_ptr)
137 bis $31,n0,$0
138 ret $31,($26),1
139
140$Odd:
141 /* q' in n0. r' in n1 */
142 addq n1,n0,n1
143
144 cmpult n1,n0,tmp # tmp := carry from addq
145 subq n1,d,AT
146 addq n0,tmp,n0
147 cmovne tmp,AT,n1
148
149 cmpult n1,d,tmp
150 addq n0,1,AT
151 cmoveq tmp,AT,n0
152 subq n1,d,AT
153 cmoveq tmp,AT,n1
154
155 stq n1,0(rem_ptr)
156 bis $31,n0,$0
157 ret $31,($26),1
158
159 .end __udiv_qrnnd
160

Warning: That file was not part of the compilation database. It may have many parsing errors.