Remove filename argument to x86 asm_init.
[openssl.git] / crypto / des / asm / crypt586.pl
1 #! /usr/bin/env perl
2 # Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 #
4 # Licensed under the OpenSSL license (the "License").  You may not use
5 # this file except in compliance with the License.  You can obtain a copy
6 # in the file LICENSE in the source distribution or at
7 # https://www.openssl.org/source/license.html
8
9 # The inner loop instruction sequence and the IP/FP modifications are from
10 # Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>
11
12 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
13 push(@INC,"${dir}","${dir}../../perlasm");
14 require "x86asm.pl";
15
16 $output=pop;
17 open STDOUT,">$output";
18
19 &asm_init($ARGV[0]);
20
21 $L="edi";
22 $R="esi";
23
24 &external_label("DES_SPtrans");
25 &fcrypt_body("fcrypt_body");
26 &asm_finish();
27
28 close STDOUT;
29
30 sub fcrypt_body
31         {
32         local($name,$do_ip)=@_;
33
34         &function_begin($name);
35
36         &comment("");
37         &comment("Load the 2 words");
38         $trans="ebp";
39
40         &xor(   $L,     $L);
41         &xor(   $R,     $R);
42
43         # PIC-ification:-)
44         &picmeup("edx","DES_SPtrans");
45         #if ($cpp)      { &picmeup("edx","DES_SPtrans");   }
46         #else           { &lea("edx",&DWP("DES_SPtrans")); }
47         &push("edx");   # becomes &swtmp(1)
48         #
49         &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT
50
51         &push(&DWC(25)); # add a variable
52
53         &set_label("start");
54         for ($i=0; $i<16; $i+=2)
55                 {
56                 &comment("");
57                 &comment("Round $i");
58                 &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx");
59
60                 &comment("");
61                 &comment("Round ".sprintf("%d",$i+1));
62                 &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx");
63                 }
64          &mov("ebx",    &swtmp(0));
65         &mov("eax",     $L);
66          &dec("ebx");
67         &mov($L,        $R);
68          &mov($R,       "eax");
69         &mov(&swtmp(0), "ebx");
70          &jnz(&label("start"));
71
72         &comment("");
73         &comment("FP");
74         &mov("edx",&wparam(0));
75
76         &FP_new($R,$L,"eax",3);
77         &mov(&DWP(0,"edx","",0),"eax");
78         &mov(&DWP(4,"edx","",0),$L);
79
80         &add("esp",8);  # remove variables
81
82         &function_end($name);
83         }
84
85 sub D_ENCRYPT
86         {
87         local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_;
88
89         &mov(   $u,             &wparam(2));                    # 2
90         &mov(   $t,             $R);
91         &shr(   $t,             16);                            # 1
92         &mov(   $tmp2,          &wparam(3));                    # 2
93         &xor(   $t,             $R);                            # 1
94
95         &and(   $u,             $t);                            # 2
96         &and(   $t,             $tmp2);                         # 2
97
98         &mov(   $tmp1,          $u);
99         &shl(   $tmp1,          16);                            # 1
100         &mov(   $tmp2,          $t);
101         &shl(   $tmp2,          16);                            # 1
102         &xor(   $u,             $tmp1);                         # 2
103         &xor(   $t,             $tmp2);                         # 2
104         &mov(   $tmp1,          &DWP(&n2a($S*4),$trans,"",0));  # 2
105         &xor(   $u,             $tmp1);
106         &mov(   $tmp2,          &DWP(&n2a(($S+1)*4),$trans,"",0));      # 2
107         &xor(   $u,             $R);
108         &xor(   $t,             $R);
109         &xor(   $t,             $tmp2);
110
111         &and(   $u,             "0xfcfcfcfc"    );              # 2
112         &xor(   $tmp1,          $tmp1);                         # 1
113         &and(   $t,             "0xcfcfcfcf"    );              # 2
114         &xor(   $tmp2,          $tmp2);
115         &movb(  &LB($tmp1),     &LB($u) );
116         &movb(  &LB($tmp2),     &HB($u) );
117         &rotr(  $t,             4               );
118         &mov(   $trans,         &swtmp(1));
119         &xor(   $L,             &DWP("     ",$trans,$tmp1,0));
120         &movb(  &LB($tmp1),     &LB($t) );
121         &xor(   $L,             &DWP("0x200",$trans,$tmp2,0));
122         &movb(  &LB($tmp2),     &HB($t) );
123         &shr(   $u,             16);
124         &xor(   $L,             &DWP("0x100",$trans,$tmp1,0));
125         &movb(  &LB($tmp1),     &HB($u) );
126         &shr(   $t,             16);
127         &xor(   $L,             &DWP("0x300",$trans,$tmp2,0));
128         &movb(  &LB($tmp2),     &HB($t) );
129         &and(   $u,             "0xff"  );
130         &and(   $t,             "0xff"  );
131         &mov(   $tmp1,          &DWP("0x600",$trans,$tmp1,0));
132         &xor(   $L,             $tmp1);
133         &mov(   $tmp1,          &DWP("0x700",$trans,$tmp2,0));
134         &xor(   $L,             $tmp1);
135         &mov(   $tmp1,          &DWP("0x400",$trans,$u,0));
136         &xor(   $L,             $tmp1);
137         &mov(   $tmp1,          &DWP("0x500",$trans,$t,0));
138         &xor(   $L,             $tmp1);
139         &mov(   $trans,         &wparam(1));
140         }
141
142 sub n2a
143         {
144         sprintf("%d",$_[0]);
145         }
146
147 # now has a side affect of rotating $a by $shift
148 sub R_PERM_OP
149         {
150         local($a,$b,$tt,$shift,$mask,$last)=@_;
151
152         &rotl(  $a,             $shift          ) if ($shift != 0);
153         &mov(   $tt,            $a              );
154         &xor(   $a,             $b              );
155         &and(   $a,             $mask           );
156         if ($notlast eq $b)
157                 {
158                 &xor(   $b,             $a              );
159                 &xor(   $tt,            $a              );
160                 }
161         else
162                 {
163                 &xor(   $tt,            $a              );
164                 &xor(   $b,             $a              );
165                 }
166         &comment("");
167         }
168
169 sub IP_new
170         {
171         local($l,$r,$tt,$lr)=@_;
172
173         &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
174         &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
175         &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
176         &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
177         &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
178
179         if ($lr != 3)
180                 {
181                 if (($lr-3) < 0)
182                         { &rotr($tt,    3-$lr); }
183                 else    { &rotl($tt,    $lr-3); }
184                 }
185         if ($lr != 2)
186                 {
187                 if (($lr-2) < 0)
188                         { &rotr($r,     2-$lr); }
189                 else    { &rotl($r,     $lr-2); }
190                 }
191         }
192
193 sub FP_new
194         {
195         local($l,$r,$tt,$lr)=@_;
196
197         if ($lr != 2)
198                 {
199                 if (($lr-2) < 0)
200                         { &rotl($r,     2-$lr); }
201                 else    { &rotr($r,     $lr-2); }
202                 }
203         if ($lr != 3)
204                 {
205                 if (($lr-3) < 0)
206                         { &rotl($l,     3-$lr); }
207                 else    { &rotr($l,     $lr-3); }
208                 }
209
210         &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
211         &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
212         &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
213         &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
214         &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
215         &rotr($tt       , 4);
216         }
217