1 #!/usr/bin/env perl
2 #
3 # ====================================================================
4 # Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
5 # project. The module is, however, dual licensed under OpenSSL and
6 # CRYPTOGAMS licenses depending on where you obtain it. For further
7 # details see http://www.openssl.org/~appro/cryptogams/.
8 # ====================================================================
9 #
10 # SHA256 block transform for x86. September 2007.
11 #
12 # Performance in clock cycles per processed byte (less is better):
13 #
14 # Pentium PIII P4 AMD K8 Core2
15 # gcc 46 36 41 27 26
16 # icc 57 33 38 25 23
17 # x86 asm 40 30 33 20 18
18 # x86_64 asm(*) - - 21 16 16
19 #
20 # (*) x86_64 assembler performance is presented for reference
21 # purposes.
22 #
23 # Performance improvement over compiler generated code varies from
24 # 10% to 40% [see above]. Not very impressive on some µ-archs, but
25 # it's 5 times smaller and optimizies amount of writes.
26
27 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
28 push(@INC,"${dir}","${dir}../../perlasm");
29 require "x86asm.pl";
30
31 &asm_init($ARGV[0],"sha512-586.pl",$ARGV[$#ARGV] eq "386");
32
33 $A="eax";
34 $E="edx";
35 $T="ebx";
36 $Aoff=&DWP(0,"esp");
37 $Boff=&DWP(4,"esp");
38 $Coff=&DWP(8,"esp");
39 $Doff=&DWP(12,"esp");
40 $Eoff=&DWP(16,"esp");
41 $Foff=&DWP(20,"esp");
42 $Goff=&DWP(24,"esp");
43 $Hoff=&DWP(28,"esp");
44 $Xoff=&DWP(32,"esp");
45 $K256="ebp";
46
47 sub BODY_00_15() {
48 my $in_16_63=shift;
49
50 &mov ("ecx",$E);
51 &add ($T,"edi") if ($in_16_63); # T += sigma1(X[-2])
52 &ror ("ecx",25-11);
53 &mov ("esi",$Foff);
54 &xor ("ecx",$E);
55 &ror ("ecx",11-6);
56 &mov (&DWP(4*(8+15),"esp"),$T) if ($in_16_63); # save X[0]
57 &xor ("ecx",$E);
58 &ror ("ecx",6); # Sigma1(e)
59 &mov ("edi",$Goff);
60 &add ($T,"ecx"); # T += Sigma1(e)
61
62 &xor ("esi","edi");
63 &mov ($Eoff,$E); # modulo-scheduled
64 &mov ("ecx",$A);
65 &and ("esi",$E);
66 &mov ($E,$Doff); # e becomes d, which is e in next iteration
67 &xor ("esi","edi"); # Ch(e,f,g)
68 &mov ("edi",$A);
69 &add ($T,"esi"); # T += Ch(e,f,g)
70
71 &ror ("ecx",22-13);
72 &add ($T,$Hoff); # T += h
73 &xor ("ecx",$A);
74 &ror ("ecx",13-2);
75 &mov ("esi",$Boff);
76 &xor ("ecx",$A);
77 &ror ("ecx",2); # Sigma0(a)
78 &add ($E,$T); # d += T
79 &mov ("edi",$Coff);
80
81 &add ($T,"ecx"); # T += Sigma0(a)
82 &mov ($Aoff,$A); # modulo-scheduled
83
84 &mov ("ecx",$A);
85 &sub ("esp",4);
86 &or ($A,"esi"); # a becomes h, which is a in next iteration
87 &and ("ecx","esi");
88 &and ($A,"edi");
89 &mov ("esi",&DWP(0,$K256));
90 &or ($A,"ecx"); # h=Maj(a,b,c)
91
92 &add ($K256,4);
93 &add ($A,$T); # h += T
94 &mov ($T,&DWP(4*(8+15+16-1),"esp")) if ($in_16_63); # preload T
95 &add ($E,"esi"); # d += K256[i]
96 &add ($A,"esi"); # h += K256[i]
97 }
98
99 &function_begin("sha256_block_data_order");
100 &mov ("esi",wparam(0)); # ctx
101 &mov ("edi",wparam(1)); # inp
102 &mov ("eax",wparam(2)); # num
103 &mov ("ebx","esp"); # saved sp
104
105 &call (&label("pic_point")); # make it PIC!
106 &set_label("pic_point");
107 &blindpop($K256);
108 &lea ($K256,&DWP(&label("K256")."-".&label("pic_point"),$K256));
109
110 &sub ("esp",16);
111 &and ("esp",-64);
112
113 &shl ("eax",6);
114 &add ("eax","edi");
115 &mov (&DWP(0,"esp"),"esi"); # ctx
116 &mov (&DWP(4,"esp"),"edi"); # inp
117 &mov (&DWP(8,"esp"),"eax"); # inp+num*128
118 &mov (&DWP(12,"esp"),"ebx"); # saved sp
119
120 &set_label("loop",16);
121 # copy input block to stack reversing byte and dword order
122 for($i=0;$i<4;$i++) {
123 &mov ("eax",&DWP($i*16+0,"edi"));
124 &mov ("ebx",&DWP($i*16+4,"edi"));
125 &mov ("ecx",&DWP($i*16+8,"edi"));
126 &mov ("edx",&DWP($i*16+12,"edi"));
127 &bswap ("eax");
128 &bswap ("ebx");
129 &bswap ("ecx");
130 &bswap ("edx");
131 &push ("eax");
132 &push ("ebx");
133 &push ("ecx");
134 &push ("edx");
135 }
136 &add ("edi",64);
137 &sub ("esp",4*8); # place for A,B,C,D,E,F,G,H
138 &mov (&DWP(4*(8+16)+4,"esp"),"edi");
139
140 # copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
141 &mov ($A,&DWP(0,"esi"));
142 &mov ("ebx",&DWP(4,"esi"));
143 &mov ("ecx",&DWP(8,"esi"));
144 &mov ("edi",&DWP(12,"esi"));
145 # &mov ($Aoff,$A);
146 &mov ($Boff,"ebx");
147 &mov ($Coff,"ecx");
148 &mov ($Doff,"edi");
149 &mov ($E,&DWP(16,"esi"));
150 &mov ("ebx",&DWP(20,"esi"));
151 &mov ("ecx",&DWP(24,"esi"));
152 &mov ("edi",&DWP(28,"esi"));
153 # &mov ($Eoff,$E);
154 &mov ($Foff,"ebx");
155 &mov ($Goff,"ecx");
156 &mov ($Hoff,"edi");
157
158 &set_label("00_15",16);
159 &mov ($T,&DWP(4*(8+15),"esp"));
160
161 &BODY_00_15();
162
163 &cmp ("esi",0xc19bf174);
164 &jne (&label("00_15"));
165
166 &mov ($T,&DWP(4*(8+15+16-1),"esp")); # preloaded in BODY_00_15(1)
167 &set_label("16_63",16);
168 &mov ("esi",$T);
169 &mov ("ecx",&DWP(4*(8+15+16-14),"esp"));
170 &ror ("esi",18-7);
171 &mov ("edi","ecx");
172 &xor ("esi",$T);
173 &ror ("esi",7);
174 &shr ($T,3);
175
176 &ror ("edi",19-17);
177 &xor ($T,"esi"); # T = sigma0(X[-15])
178 &xor ("edi","ecx");
179 &ror ("edi",17);
180 &shr ("ecx",10);
181 &add ($T,&DWP(4*(8+15+16),"esp")); # T += X[-16]
182 &xor ("edi","ecx"); # sigma1(X[-2])
183
184 &add ($T,&DWP(4*(8+15+16-9),"esp")); # T += X[-7]
185 # &add ($T,"edi"); # T += sigma1(X[-2])
186 # &mov (&DWP(4*(8+15),"esp"),$T); # save X[0]
187
188 &BODY_00_15(1);
189
190 &cmp ("esi",0xc67178f2);
191 &jne (&label("16_63"));
192
193 &mov ("esi",&DWP(4*(8+16+64)+0,"esp"));#ctx
194 # &mov ($A,$Aoff);
195 &mov ("ebx",$Boff);
196 &mov ("ecx",$Coff);
197 &mov ("edi",$Doff);
198 &add ($A,&DWP(0,"esi"));
199 &add ("ebx",&DWP(4,"esi"));
200 &add ("ecx",&DWP(8,"esi"));
201 &add ("edi",&DWP(12,"esi"));
202 &mov (&DWP(0,"esi"),$A);
203 &mov (&DWP(4,"esi"),"ebx");
204 &mov (&DWP(8,"esi"),"ecx");
205 &mov (&DWP(12,"esi"),"edi");
206 # &mov ($E,$Eoff);
207 &mov ("eax",$Foff);
208 &mov ("ebx",$Goff);
209 &mov ("ecx",$Hoff);
210 &mov ("edi",&DWP(4*(8+16+64)+4,"esp"));#inp
211 &add ($E,&DWP(16,"esi"));
212 &add ("eax",&DWP(20,"esi"));
213 &add ("ebx",&DWP(24,"esi"));
214 &add ("ecx",&DWP(28,"esi"));
215 &mov (&DWP(16,"esi"),$E);
216 &mov (&DWP(20,"esi"),"eax");
217 &mov (&DWP(24,"esi"),"ebx");
218 &mov (&DWP(28,"esi"),"ecx");
219
220 &add ("esp",4*(8+16+64)); # destroy frame
221 &sub ($K256,4*64); # rewind K
222
223 &cmp ("edi",&DWP(8,"esp")); # are we done yet?
224 &jb (&label("loop"));
225
226 &mov ("esp",&DWP(12,"esp")); # restore sp
227 &function_end_A();
228
229 &set_label("K256",64); # Yes! I keep it in the code segment!
230 &data_word(0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5);
231 &data_word(0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5);
232 &data_word(0xd807aa98,0x12835b01,0x243185be,0x550c7dc3);
233 &data_word(0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174);
234 &data_word(0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc);
235 &data_word(0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da);
236 &data_word(0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7);
237 &data_word(0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967);
238 &data_word(0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13);
239 &data_word(0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85);
240 &data_word(0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3);
241 &data_word(0xd192e819,0xd6990624,0xf40e3585,0x106aa070);
242 &data_word(0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5);
243 &data_word(0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3);
244 &data_word(0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208);
245 &data_word(0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2);
246 &function_end_B("sha256_block_data_order");
247 &asciz("SHA256 block transform for x86, CRYPTOGAMS by <appro\@openssl.org>");
248
249 &asm_finish();