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-rw-r--r--src/lib/libcrypto/cast/asm/cast-586.pl176
-rw-r--r--src/lib/libcrypto/cast/asm/readme7
2 files changed, 183 insertions, 0 deletions
diff --git a/src/lib/libcrypto/cast/asm/cast-586.pl b/src/lib/libcrypto/cast/asm/cast-586.pl
new file mode 100644
index 0000000000..0ed55d1905
--- /dev/null
+++ b/src/lib/libcrypto/cast/asm/cast-586.pl
@@ -0,0 +1,176 @@
1#!/usr/local/bin/perl
2
3# define for pentium pro friendly version
4$ppro=1;
5
6push(@INC,"perlasm","../../perlasm");
7require "x86asm.pl";
8require "cbc.pl";
9
10&asm_init($ARGV[0],"cast-586.pl",$ARGV[$#ARGV] eq "386");
11
12$CAST_ROUNDS=16;
13$L="edi";
14$R="esi";
15$K="ebp";
16$tmp1="ecx";
17$tmp2="ebx";
18$tmp3="eax";
19$tmp4="edx";
20$S1="CAST_S_table0";
21$S2="CAST_S_table1";
22$S3="CAST_S_table2";
23$S4="CAST_S_table3";
24
25@F1=("add","xor","sub");
26@F2=("xor","sub","add");
27@F3=("sub","add","xor");
28
29&CAST_encrypt("CAST_encrypt",1);
30&CAST_encrypt("CAST_decrypt",0);
31&cbc("CAST_cbc_encrypt","CAST_encrypt","CAST_decrypt",1,4,5,3,-1,-1) unless $main'openbsd;
32
33&asm_finish();
34
35sub CAST_encrypt {
36 local($name,$enc)=@_;
37
38 local($win_ex)=<<"EOF";
39EXTERN _CAST_S_table0:DWORD
40EXTERN _CAST_S_table1:DWORD
41EXTERN _CAST_S_table2:DWORD
42EXTERN _CAST_S_table3:DWORD
43EOF
44 &main::external_label(
45 "CAST_S_table0",
46 "CAST_S_table1",
47 "CAST_S_table2",
48 "CAST_S_table3",
49 );
50
51 &function_begin_B($name,$win_ex);
52
53 &comment("");
54
55 &push("ebp");
56 &push("ebx");
57 &mov($tmp2,&wparam(0));
58 &mov($K,&wparam(1));
59 &push("esi");
60 &push("edi");
61
62 &comment("Load the 2 words");
63 &mov($L,&DWP(0,$tmp2,"",0));
64 &mov($R,&DWP(4,$tmp2,"",0));
65
66 &comment('Get short key flag');
67 &mov($tmp3,&DWP(128,$K,"",0));
68 if($enc) {
69 &push($tmp3);
70 } else {
71 &or($tmp3,$tmp3);
72 &jnz(&label('cast_dec_skip'));
73 }
74
75 &xor($tmp3, $tmp3);
76
77 # encrypting part
78
79 if ($enc) {
80 &E_CAST( 0,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
81 &E_CAST( 1,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
82 &E_CAST( 2,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
83 &E_CAST( 3,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
84 &E_CAST( 4,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
85 &E_CAST( 5,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
86 &E_CAST( 6,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
87 &E_CAST( 7,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
88 &E_CAST( 8,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
89 &E_CAST( 9,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
90 &E_CAST(10,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
91 &E_CAST(11,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
92 &comment('test short key flag');
93 &pop($tmp4);
94 &or($tmp4,$tmp4);
95 &jnz(&label('cast_enc_done'));
96 &E_CAST(12,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
97 &E_CAST(13,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
98 &E_CAST(14,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
99 &E_CAST(15,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
100 } else {
101 &E_CAST(15,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
102 &E_CAST(14,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
103 &E_CAST(13,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
104 &E_CAST(12,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
105 &set_label('cast_dec_skip');
106 &E_CAST(11,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
107 &E_CAST(10,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
108 &E_CAST( 9,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
109 &E_CAST( 8,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
110 &E_CAST( 7,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
111 &E_CAST( 6,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
112 &E_CAST( 5,$S,$L,$R,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
113 &E_CAST( 4,$S,$R,$L,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
114 &E_CAST( 3,$S,$L,$R,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
115 &E_CAST( 2,$S,$R,$L,$K,@F3,$tmp1,$tmp2,$tmp3,$tmp4);
116 &E_CAST( 1,$S,$L,$R,$K,@F2,$tmp1,$tmp2,$tmp3,$tmp4);
117 &E_CAST( 0,$S,$R,$L,$K,@F1,$tmp1,$tmp2,$tmp3,$tmp4);
118 }
119
120 &set_label('cast_enc_done') if $enc;
121# Why the nop? - Ben 17/1/99
122 &nop();
123 &mov($tmp3,&wparam(0));
124 &mov(&DWP(4,$tmp3,"",0),$L);
125 &mov(&DWP(0,$tmp3,"",0),$R);
126 &function_end($name);
127}
128
129sub E_CAST {
130 local($i,$S,$L,$R,$K,$OP1,$OP2,$OP3,$tmp1,$tmp2,$tmp3,$tmp4)=@_;
131 # Ri needs to have 16 pre added.
132
133 &comment("round $i");
134 &mov( $tmp4, &DWP($i*8,$K,"",1));
135
136 &mov( $tmp1, &DWP($i*8+4,$K,"",1));
137 &$OP1( $tmp4, $R);
138
139 &rotl( $tmp4, &LB($tmp1));
140
141 if ($ppro) {
142 &mov( $tmp2, $tmp4); # B
143 &xor( $tmp1, $tmp1);
144
145 &movb( &LB($tmp1), &HB($tmp4)); # A
146 &and( $tmp2, 0xff);
147
148 &shr( $tmp4, 16); #
149 &xor( $tmp3, $tmp3);
150 } else {
151 &mov( $tmp2, $tmp4); # B
152 &movb( &LB($tmp1), &HB($tmp4)); # A # BAD BAD BAD
153
154 &shr( $tmp4, 16); #
155 &and( $tmp2, 0xff);
156 }
157
158 &movb( &LB($tmp3), &HB($tmp4)); # C # BAD BAD BAD
159 &and( $tmp4, 0xff); # D
160
161 &mov( $tmp1, &DWP($S1,"",$tmp1,4));
162 &mov( $tmp2, &DWP($S2,"",$tmp2,4));
163
164 &$OP2( $tmp1, $tmp2);
165 &mov( $tmp2, &DWP($S3,"",$tmp3,4));
166
167 &$OP3( $tmp1, $tmp2);
168 &mov( $tmp2, &DWP($S4,"",$tmp4,4));
169
170 &$OP1( $tmp1, $tmp2);
171 # XXX
172
173 &xor( $L, $tmp1);
174 # XXX
175}
176
diff --git a/src/lib/libcrypto/cast/asm/readme b/src/lib/libcrypto/cast/asm/readme
new file mode 100644
index 0000000000..fbcd76289e
--- /dev/null
+++ b/src/lib/libcrypto/cast/asm/readme
@@ -0,0 +1,7 @@
1There is a ppro flag in cast-586 which turns on/off
2generation of pentium pro/II friendly code
3
4This flag makes the inner loop one cycle longer, but generates
5code that runs %30 faster on the pentium pro/II, while only %7 slower
6on the pentium. By default, this flag is on.
7
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-10 02:05:55 +0000