1 | # Alpha EV5 __mpn_lshift -- |
2 | |
3 | # Copyright (C) 1994-2022 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 <https://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_lshift |
34 | .ent __mpn_lshift |
35 | __mpn_lshift: |
36 | .frame $30,0,$26,0 |
37 | |
38 | s8addq $18,$17,$17 # make r17 point at end of s1 |
39 | ldq $4,-8($17) # load first limb |
40 | subq $31,$19,$20 |
41 | s8addq $18,$16,$16 # make r16 point at end of RES |
42 | subq $18,1,$18 |
43 | and $18,4-1,$28 # number of limbs in first loop |
44 | srl $4,$20,$0 # compute function result |
45 | |
46 | beq $28,.L0 |
47 | subq $18,$28,$18 |
48 | |
49 | .align 3 |
50 | .Loop0: ldq $3,-16($17) |
51 | subq $16,8,$16 |
52 | sll $4,$19,$5 |
53 | subq $17,8,$17 |
54 | subq $28,1,$28 |
55 | srl $3,$20,$6 |
56 | or $3,$3,$4 |
57 | or $5,$6,$8 |
58 | stq $8,0($16) |
59 | bne $28,.Loop0 |
60 | |
61 | .L0: sll $4,$19,$24 |
62 | beq $18,.Lend |
63 | # warm up phase 1 |
64 | ldq $1,-16($17) |
65 | subq $18,4,$18 |
66 | ldq $2,-24($17) |
67 | ldq $3,-32($17) |
68 | ldq $4,-40($17) |
69 | beq $18,.Lend1 |
70 | # warm up phase 2 |
71 | srl $1,$20,$7 |
72 | sll $1,$19,$21 |
73 | srl $2,$20,$8 |
74 | ldq $1,-48($17) |
75 | sll $2,$19,$22 |
76 | ldq $2,-56($17) |
77 | srl $3,$20,$5 |
78 | or $7,$24,$7 |
79 | sll $3,$19,$23 |
80 | or $8,$21,$8 |
81 | srl $4,$20,$6 |
82 | ldq $3,-64($17) |
83 | sll $4,$19,$24 |
84 | ldq $4,-72($17) |
85 | subq $18,4,$18 |
86 | beq $18,.Lend2 |
87 | .align 4 |
88 | # main loop |
89 | .Loop: stq $7,-8($16) |
90 | or $5,$22,$5 |
91 | stq $8,-16($16) |
92 | or $6,$23,$6 |
93 | |
94 | srl $1,$20,$7 |
95 | subq $18,4,$18 |
96 | sll $1,$19,$21 |
97 | unop # ldq $31,-96($17) |
98 | |
99 | srl $2,$20,$8 |
100 | ldq $1,-80($17) |
101 | sll $2,$19,$22 |
102 | ldq $2,-88($17) |
103 | |
104 | stq $5,-24($16) |
105 | or $7,$24,$7 |
106 | stq $6,-32($16) |
107 | or $8,$21,$8 |
108 | |
109 | srl $3,$20,$5 |
110 | unop # ldq $31,-96($17) |
111 | sll $3,$19,$23 |
112 | subq $16,32,$16 |
113 | |
114 | srl $4,$20,$6 |
115 | ldq $3,-96($17) |
116 | sll $4,$19,$24 |
117 | ldq $4,-104($17) |
118 | |
119 | subq $17,32,$17 |
120 | bne $18,.Loop |
121 | # cool down phase 2/1 |
122 | .Lend2: stq $7,-8($16) |
123 | or $5,$22,$5 |
124 | stq $8,-16($16) |
125 | or $6,$23,$6 |
126 | srl $1,$20,$7 |
127 | sll $1,$19,$21 |
128 | srl $2,$20,$8 |
129 | sll $2,$19,$22 |
130 | stq $5,-24($16) |
131 | or $7,$24,$7 |
132 | stq $6,-32($16) |
133 | or $8,$21,$8 |
134 | srl $3,$20,$5 |
135 | sll $3,$19,$23 |
136 | srl $4,$20,$6 |
137 | sll $4,$19,$24 |
138 | # cool down phase 2/2 |
139 | stq $7,-40($16) |
140 | or $5,$22,$5 |
141 | stq $8,-48($16) |
142 | or $6,$23,$6 |
143 | stq $5,-56($16) |
144 | stq $6,-64($16) |
145 | # cool down phase 2/3 |
146 | stq $24,-72($16) |
147 | ret $31,($26),1 |
148 | |
149 | # cool down phase 1/1 |
150 | .Lend1: srl $1,$20,$7 |
151 | sll $1,$19,$21 |
152 | srl $2,$20,$8 |
153 | sll $2,$19,$22 |
154 | srl $3,$20,$5 |
155 | or $7,$24,$7 |
156 | sll $3,$19,$23 |
157 | or $8,$21,$8 |
158 | srl $4,$20,$6 |
159 | sll $4,$19,$24 |
160 | # cool down phase 1/2 |
161 | stq $7,-8($16) |
162 | or $5,$22,$5 |
163 | stq $8,-16($16) |
164 | or $6,$23,$6 |
165 | stq $5,-24($16) |
166 | stq $6,-32($16) |
167 | stq $24,-40($16) |
168 | ret $31,($26),1 |
169 | |
170 | .Lend: stq $24,-8($16) |
171 | ret $31,($26),1 |
172 | .end __mpn_lshift |
173 | |