Update perl asm scripts include paths for perlasm.
[openssl.git] / crypto / bf / asm / bf-586.pl
1 #!/usr/local/bin/perl
2
3 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
4 push(@INC,"${dir}","${dir}../../perlasm");
5 require "x86asm.pl";
6 require "cbc.pl";
7
8 &asm_init($ARGV[0],"bf-586.pl",$ARGV[$#ARGV] eq "386");
9
10 $BF_ROUNDS=16;
11 $BF_OFF=($BF_ROUNDS+2)*4;
12 $L="edi";
13 $R="esi";
14 $P="ebp";
15 $tmp1="eax";
16 $tmp2="ebx";
17 $tmp3="ecx";
18 $tmp4="edx";
19
20 &BF_encrypt("BF_encrypt",1);
21 &BF_encrypt("BF_decrypt",0);
22 &cbc("BF_cbc_encrypt","BF_encrypt","BF_decrypt",1,4,5,3,-1,-1);
23 &asm_finish();
24
25 sub BF_encrypt
26         {
27         local($name,$enc)=@_;
28
29         &function_begin_B($name,"");
30
31         &comment("");
32
33         &push("ebp");
34         &push("ebx");
35         &mov($tmp2,&wparam(0));
36         &mov($P,&wparam(1));
37         &push("esi");
38         &push("edi");
39
40         &comment("Load the 2 words");
41         &mov($L,&DWP(0,$tmp2,"",0));
42         &mov($R,&DWP(4,$tmp2,"",0));
43
44         &xor(   $tmp1,  $tmp1);
45
46         # encrypting part
47
48         if ($enc)
49                 {
50                  &mov($tmp2,&DWP(0,$P,"",0));
51                 &xor(   $tmp3,  $tmp3);
52
53                 &xor($L,$tmp2);
54                 for ($i=0; $i<$BF_ROUNDS; $i+=2)
55                         {
56                         &comment("");
57                         &comment("Round $i");
58                         &BF_ENCRYPT($i+1,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
59
60                         &comment("");
61                         &comment("Round ".sprintf("%d",$i+1));
62                         &BF_ENCRYPT($i+2,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
63                         }
64                 # &mov($tmp1,&wparam(0)); In last loop
65                 &mov($tmp4,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
66                 }
67         else
68                 {
69                  &mov($tmp2,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
70                 &xor(   $tmp3,  $tmp3);
71
72                 &xor($L,$tmp2);
73                 for ($i=$BF_ROUNDS; $i>0; $i-=2)
74                         {
75                         &comment("");
76                         &comment("Round $i");
77                         &BF_ENCRYPT($i,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
78                         &comment("");
79                         &comment("Round ".sprintf("%d",$i-1));
80                         &BF_ENCRYPT($i-1,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
81                         }
82                 # &mov($tmp1,&wparam(0)); In last loop
83                 &mov($tmp4,&DWP(0,$P,"",0));
84                 }
85
86         &xor($R,$tmp4);
87         &mov(&DWP(4,$tmp1,"",0),$L);
88
89         &mov(&DWP(0,$tmp1,"",0),$R);
90         &function_end($name);
91         }
92
93 sub BF_ENCRYPT
94         {
95         local($i,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,$enc)=@_;
96
97         &mov(   $tmp4,          &DWP(&n2a($i*4),$P,"",0)); # for next round
98
99         &mov(   $tmp2,          $R);
100         &xor(   $L,             $tmp4);
101
102         &shr(   $tmp2,          16);
103         &mov(   $tmp4,          $R);
104
105         &movb(  &LB($tmp1),     &HB($tmp2));    # A
106         &and(   $tmp2,          0xff);          # B
107
108         &movb(  &LB($tmp3),     &HB($tmp4));    # C
109         &and(   $tmp4,          0xff);          # D
110
111         &mov(   $tmp1,          &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4));
112         &mov(   $tmp2,          &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4));
113
114         &add(   $tmp2,          $tmp1);
115         &mov(   $tmp1,          &DWP(&n2a($BF_OFF+0x0800),$P,$tmp3,4));
116
117         &xor(   $tmp2,          $tmp1);
118         &mov(   $tmp4,          &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp4,4));
119
120         &add(   $tmp2,          $tmp4);
121         if (($enc && ($i != 16)) || ((!$enc) && ($i != 1)))
122                 { &xor( $tmp1,          $tmp1); }
123         else
124                 {
125                 &comment("Load parameter 0 ($i) enc=$enc");
126                 &mov($tmp1,&wparam(0));
127                 } # In last loop
128
129         &xor(   $L,             $tmp2);
130         # delay
131         }
132
133 sub n2a
134         {
135         sprintf("%d",$_[0]);
136         }
137