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1 # Alpha EV5 __mpn_rshift --
2
3 # Copyright (C) 1994-2019 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
21 # INPUT PARAMETERS
22 # res_ptr r16
23 # s1_ptr r17
24 # size r18
25 # cnt r19
26
27 # This code runs at 3.25 cycles/limb on the EV5.
28
29 .set noreorder
30 .set noat
31.text
32 .align 3
33 .globl __mpn_rshift
34 .ent __mpn_rshift
35__mpn_rshift:
36 .frame $30,0,$26,0
37
38 ldq $4,0($17) # load first limb
39 subq $31,$19,$20
40 subq $18,1,$18
41 and $18,4-1,$28 # number of limbs in first loop
42 sll $4,$20,$0 # compute function result
43
44 beq $28,.L0
45 subq $18,$28,$18
46
47 .align 3
48.Loop0: ldq $3,8($17)
49 addq $16,8,$16
50 srl $4,$19,$5
51 addq $17,8,$17
52 subq $28,1,$28
53 sll $3,$20,$6
54 or $3,$3,$4
55 or $5,$6,$8
56 stq $8,-8($16)
57 bne $28,.Loop0
58
59.L0: srl $4,$19,$24
60 beq $18,.Lend
61 # warm up phase 1
62 ldq $1,8($17)
63 subq $18,4,$18
64 ldq $2,16($17)
65 ldq $3,24($17)
66 ldq $4,32($17)
67 beq $18,.Lend1
68 # warm up phase 2
69 sll $1,$20,$7
70 srl $1,$19,$21
71 sll $2,$20,$8
72 ldq $1,40($17)
73 srl $2,$19,$22
74 ldq $2,48($17)
75 sll $3,$20,$5
76 or $7,$24,$7
77 srl $3,$19,$23
78 or $8,$21,$8
79 sll $4,$20,$6
80 ldq $3,56($17)
81 srl $4,$19,$24
82 ldq $4,64($17)
83 subq $18,4,$18
84 beq $18,.Lend2
85 .align 4
86 # main loop
87.Loop: stq $7,0($16)
88 or $5,$22,$5
89 stq $8,8($16)
90 or $6,$23,$6
91
92 sll $1,$20,$7
93 subq $18,4,$18
94 srl $1,$19,$21
95 unop # ldq $31,-96($17)
96
97 sll $2,$20,$8
98 ldq $1,72($17)
99 srl $2,$19,$22
100 ldq $2,80($17)
101
102 stq $5,16($16)
103 or $7,$24,$7
104 stq $6,24($16)
105 or $8,$21,$8
106
107 sll $3,$20,$5
108 unop # ldq $31,-96($17)
109 srl $3,$19,$23
110 addq $16,32,$16
111
112 sll $4,$20,$6
113 ldq $3,88($17)
114 srl $4,$19,$24
115 ldq $4,96($17)
116
117 addq $17,32,$17
118 bne $18,.Loop
119 # cool down phase 2/1
120.Lend2: stq $7,0($16)
121 or $5,$22,$5
122 stq $8,8($16)
123 or $6,$23,$6
124 sll $1,$20,$7
125 srl $1,$19,$21
126 sll $2,$20,$8
127 srl $2,$19,$22
128 stq $5,16($16)
129 or $7,$24,$7
130 stq $6,24($16)
131 or $8,$21,$8
132 sll $3,$20,$5
133 srl $3,$19,$23
134 sll $4,$20,$6
135 srl $4,$19,$24
136 # cool down phase 2/2
137 stq $7,32($16)
138 or $5,$22,$5
139 stq $8,40($16)
140 or $6,$23,$6
141 stq $5,48($16)
142 stq $6,56($16)
143 # cool down phase 2/3
144 stq $24,64($16)
145 ret $31,($26),1
146
147 # cool down phase 1/1
148.Lend1: sll $1,$20,$7
149 srl $1,$19,$21
150 sll $2,$20,$8
151 srl $2,$19,$22
152 sll $3,$20,$5
153 or $7,$24,$7
154 srl $3,$19,$23
155 or $8,$21,$8
156 sll $4,$20,$6
157 srl $4,$19,$24
158 # cool down phase 1/2
159 stq $7,0($16)
160 or $5,$22,$5
161 stq $8,8($16)
162 or $6,$23,$6
163 stq $5,16($16)
164 stq $6,24($16)
165 stq $24,32($16)
166 ret $31,($26),1
167
168.Lend: stq $24,0($16)
169 ret $31,($26),1
170 .end __mpn_rshift
171

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