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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
| #! /usr/bin/env perl
| # Copyright 2014-2020 The OpenSSL Project Authors. All Rights Reserved.
| #
| # Licensed under the OpenSSL license (the "License"). You may not use
| # this file except in compliance with the License. You can obtain a copy
| # in the file LICENSE in the source distribution or at
| # https://www.openssl.org/source/license.html
|
| #
| # ====================================================================
| # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
| # project. The module is, however, dual licensed under OpenSSL and
| # CRYPTOGAMS licenses depending on where you obtain it. For further
| # details see http://www.openssl.org/~appro/cryptogams/.
| # ====================================================================
| #
| # RC4 for C64x+.
| #
| # April 2014
| #
| # RC4 subroutine processes one byte in 7.0 cycles, which is 3x faster
| # than TI CGT-generated code. Loop is scheduled in such way that
| # there is only one reference to memory in each cycle. This is done
| # to avoid L1D memory banking conflicts, see SPRU871 TI publication
| # for further details. Otherwise it should be possible to schedule
| # the loop for iteration interval of 6...
|
| ($KEY,$LEN,$INP,$OUT)=("A4","B4","A6","B6");
|
| ($KEYA,$XX,$TY,$xx,$ONE,$ret)=map("A$_",(5,7,8,9,1,2));
| ($KEYB,$YY,$TX,$tx,$SUM,$dat)=map("B$_",(5,7,8,9,1,2));
|
| $code.=<<___;
| .text
|
| .if .ASSEMBLER_VERSION<7000000
| .asg 0,__TI_EABI__
| .endif
| .if __TI_EABI__
| .nocmp
| .asg RC4,_RC4
| .asg RC4_set_key,_RC4_set_key
| .asg RC4_options,_RC4_options
| .endif
|
| .global _RC4
| .align 16
| _RC4:
| .asmfunc
| MV $LEN,B0
| [!B0] BNOP B3 ; if (len==0) return;
| ||[B0] ADD $KEY,2,$KEYA
| ||[B0] ADD $KEY,2,$KEYB
| [B0] MVK 1,$ONE
| ||[B0] LDBU *${KEYA}[-2],$XX ; key->x
| [B0] LDBU *${KEYB}[-1],$YY ; key->y
| || NOP 4
|
| ADD4 $ONE,$XX,$XX
| LDBU *${KEYA}[$XX],$TX
| || MVC $LEN,ILC
| NOP 4
| ;;==================================================
| SPLOOP 7
| || ADD4 $TX,$YY,$YY
|
| LDBU *${KEYB}[$YY],$TY
| || MVD $XX,$xx
| || ADD4 $ONE,$XX,$XX
| LDBU *${KEYA}[$XX],$tx
| CMPEQ $YY,$XX,B0
| || NOP 3
| STB $TX,*${KEYB}[$YY]
| ||[B0] ADD4 $TX,$YY,$YY
| STB $TY,*${KEYA}[$xx]
| ||[!B0] ADD4 $tx,$YY,$YY
| ||[!B0] MVD $tx,$TX
| ADD4 $TY,$TX,$SUM ; [0,0] $TX is not replaced by $tx yet!
| || NOP 2
| LDBU *$INP++,$dat
| || NOP 2
| LDBU *${KEYB}[$SUM],$ret
| || NOP 5
| XOR.L $dat,$ret,$ret
| SPKERNEL
| || STB $ret,*$OUT++
| ;;==================================================
| SUB4 $XX,$ONE,$XX
| || NOP 5
| STB $XX,*${KEYA}[-2] ; key->x
| || SUB4 $YY,$TX,$YY
| || BNOP B3
| STB $YY,*${KEYB}[-1] ; key->y
| || NOP 5
| .endasmfunc
|
| .global _RC4_set_key
| .align 16
| _RC4_set_key:
| .asmfunc
| .if .BIG_ENDIAN
| MVK 0x00000404,$ONE
| || MVK 0x00000203,B0
| MVKH 0x04040000,$ONE
| || MVKH 0x00010000,B0
| .else
| MVK 0x00000404,$ONE
| || MVK 0x00000100,B0
| MVKH 0x04040000,$ONE
| || MVKH 0x03020000,B0
| .endif
| ADD $KEY,2,$KEYA
| || ADD $KEY,2,$KEYB
| || ADD $INP,$LEN,$ret ; end of input
| LDBU *${INP}++,$dat
| || MVK 0,$TX
| STH $TX,*${KEY}++ ; key->x=key->y=0
| || MV B0,A0
| || MVK 64-4,B0
|
| ;;==================================================
| SPLOOPD 1
| || MVC B0,ILC
|
| STNW A0,*${KEY}++
| || ADD4 $ONE,A0,A0
| SPKERNEL
| ;;==================================================
|
| MVK 0,$YY
| || MVK 0,$XX
| MVK 1,$ONE
| || MVK 256-1,B0
|
| ;;==================================================
| SPLOOPD 8
| || MVC B0,ILC
|
| ADD4 $dat,$YY,$YY
| || CMPEQ $INP,$ret,A0 ; end of input?
| LDBU *${KEYB}[$YY],$TY
| || MVD $XX,$xx
| || ADD4 $ONE,$XX,$XX
| LDBU *${KEYA}[$XX],$tx
| ||[A0] SUB $INP,$LEN,$INP ; rewind
| LDBU *${INP}++,$dat
| || CMPEQ $YY,$XX,B0
| || NOP 3
| STB $TX,*${KEYB}[$YY]
| ||[B0] ADD4 $TX,$YY,$YY
| STB $TY,*${KEYA}[$xx]
| ||[!B0] ADD4 $tx,$YY,$YY
| ||[!B0] MV $tx,$TX
| SPKERNEL
| ;;==================================================
|
| BNOP B3,5
| .endasmfunc
|
| .global _RC4_options
| .align 16
| _RC4_options:
| _rc4_options:
| .asmfunc
| BNOP B3,1
| ADDKPC _rc4_options,B4
| .if __TI_EABI__
| MVKL \$PCR_OFFSET(rc4_options,_rc4_options),A4
| MVKH \$PCR_OFFSET(rc4_options,_rc4_options),A4
| .else
| MVKL (rc4_options-_rc4_options),A4
| MVKH (rc4_options-_rc4_options),A4
| .endif
| ADD B4,A4,A4
| .endasmfunc
|
| .if __TI_EABI__
| .sect ".text:rc4_options.const"
| .else
| .sect ".const:rc4_options"
| .endif
| .align 4
| rc4_options:
| .cstring "rc4(sploop,char)"
| .cstring "RC4 for C64+, CRYPTOGAMS by <appro\@openssl.org>"
| .align 4
| ___
|
| $output=pop;
| open STDOUT,">$output";
| print $code;
| close STDOUT or die "error closing STDOUT: $!";
|
|
