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 # ====================================================================
10 # SHA256 block transform for x86. September 2007.
12 # Performance in clock cycles per processed byte (less is better):
14 # Pentium PIII P4 AMD K8 Core2
17 # x86 asm 40 30 35 20 20
18 # x86_64 asm(*) - - 21 15.8 16.5
20 # (*) x86_64 assembler performance is presented for reference
23 # Performance improvement over compiler generated code varies from
24 # 10% to 40% [see above]. Not very impressive on some ยต-archs, but
25 # it's 5 times smaller and optimizies amount of writes.
27 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
28 push(@INC,"${dir}","${dir}../../perlasm");
31 &asm_init($ARGV[0],"sha512-586.pl",$ARGV[$#ARGV] eq "386");
51 &add ($T,&DWP(4*(8+15+16-9),"esp")) if ($in_16_63); # T += X[-7]
58 &mov (&DWP(4*(8+15),"esp"),$T) if ($in_16_63); # save X[0]
59 &xor ("ecx","edi"); # Sigma1(e)
61 &add ($T,"ecx"); # T += Sigma1(e)
62 &mov ($Eoff,$E); # modulo-scheduled
67 &mov ($E,$Doff); # e becomes d, which is e in next iteration
68 &xor ("esi","edi"); # Ch(e,f,g)
70 &add ($T,"esi"); # T += Ch(e,f,g)
73 &add ($T,$Hoff); # T += h
78 &add ($E,$T); # d += T
79 &xor ("ecx","edi"); # Sigma0(a)
82 &add ($T,"ecx"); # T += Sigma0(a)
83 &mov ($Aoff,$A); # modulo-scheduled
87 &or ($A,"esi"); # a becomes h, which is a in next iteration
90 &mov ("esi",&DWP(0,$K256));
91 &or ($A,"ecx"); # h=Maj(a,b,c)
94 &add ($A,$T); # h += T
95 &mov ($T,&DWP(4*(8+15+16-1),"esp")) if ($in_16_63); # preload T
96 &add ($E,"esi"); # d += K256[i]
97 &add ($A,"esi"); # h += K256[i]
100 &function_begin("sha256_block_data_order");
101 &mov ("esi",wparam(0)); # ctx
102 &mov ("edi",wparam(1)); # inp
103 &mov ("eax",wparam(2)); # num
104 &mov ("ebx","esp"); # saved sp
106 &call (&label("pic_point")); # make it PIC!
107 &set_label("pic_point");
109 &lea ($K256,&DWP(&label("K256")."-".&label("pic_point"),$K256));
116 &mov (&DWP(0,"esp"),"esi"); # ctx
117 &mov (&DWP(4,"esp"),"edi"); # inp
118 &mov (&DWP(8,"esp"),"eax"); # inp+num*128
119 &mov (&DWP(12,"esp"),"ebx"); # saved sp
121 &set_label("loop",16);
122 # copy input block to stack reversing byte and dword order
123 for($i=0;$i<4;$i++) {
124 &mov ("eax",&DWP($i*16+0,"edi"));
125 &mov ("ebx",&DWP($i*16+4,"edi"));
126 &mov ("ecx",&DWP($i*16+8,"edi"));
127 &mov ("edx",&DWP($i*16+12,"edi"));
138 &sub ("esp",4*8); # place for A,B,C,D,E,F,G,H
139 &mov (&DWP(4*(8+16)+4,"esp"),"edi");
141 # copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
142 &mov ($A,&DWP(0,"esi"));
143 &mov ("ebx",&DWP(4,"esi"));
144 &mov ("ecx",&DWP(8,"esi"));
145 &mov ("edi",&DWP(12,"esi"));
150 &mov ($E,&DWP(16,"esi"));
151 &mov ("ebx",&DWP(20,"esi"));
152 &mov ("ecx",&DWP(24,"esi"));
153 &mov ("edi",&DWP(28,"esi"));
159 &set_label("00_15",16);
160 &mov ($T,&DWP(4*(8+15),"esp"));
164 &cmp ("esi",0xc19bf174);
165 &jne (&label("00_15"));
167 &mov ($T,&DWP(4*(8+15+16-1),"esp")); # preloaded in BODY_00_15(1)
168 &set_label("16_63",16);
170 &mov ("ecx",&DWP(4*(8+15+16-14),"esp"));
176 &xor ($T,"esi"); # T = sigma0(X[-15])
179 &mov ("esi",&DWP(4*(8+15+16),"esp"));
183 &add ($T,"esi"); # T += X[-16]
184 &xor ("edi","ecx") # sigma1(X[-2])
186 &add ($T,"edi"); # T += sigma1(X[-2])
187 # &add ($T,&DWP(4*(8+15+16-9),"esp")); # T += X[-7], moved to BODY_00_15(1)
188 # &mov (&DWP(4*(8+15),"esp"),$T); # save X[0]
192 &cmp ("esi",0xc67178f2);
193 &jne (&label("16_63"));
195 &mov ("esi",&DWP(4*(8+16+64)+0,"esp"));#ctx
200 &add ($A,&DWP(0,"esi"));
201 &add ("ebx",&DWP(4,"esi"));
202 &add ("ecx",&DWP(8,"esi"));
203 &add ("edi",&DWP(12,"esi"));
204 &mov (&DWP(0,"esi"),$A);
205 &mov (&DWP(4,"esi"),"ebx");
206 &mov (&DWP(8,"esi"),"ecx");
207 &mov (&DWP(12,"esi"),"edi");
212 &mov ("edi",&DWP(4*(8+16+64)+4,"esp"));#inp
213 &add ($E,&DWP(16,"esi"));
214 &add ("eax",&DWP(20,"esi"));
215 &add ("ebx",&DWP(24,"esi"));
216 &add ("ecx",&DWP(28,"esi"));
217 &mov (&DWP(16,"esi"),$E);
218 &mov (&DWP(20,"esi"),"eax");
219 &mov (&DWP(24,"esi"),"ebx");
220 &mov (&DWP(28,"esi"),"ecx");
222 &add ("esp",4*(8+16+64)); # destroy frame
223 &sub ($K256,4*64); # rewind K
225 &cmp ("edi",&DWP(8,"esp")); # are we done yet?
226 &jb (&label("loop"));
228 &mov ("esp",&DWP(12,"esp")); # restore sp
231 &set_label("K256",64); # Yes! I keep it in the code segment!
232 &data_word(0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5);
233 &data_word(0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5);
234 &data_word(0xd807aa98,0x12835b01,0x243185be,0x550c7dc3);
235 &data_word(0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174);
236 &data_word(0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc);
237 &data_word(0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da);
238 &data_word(0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7);
239 &data_word(0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967);
240 &data_word(0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13);
241 &data_word(0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85);
242 &data_word(0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3);
243 &data_word(0xd192e819,0xd6990624,0xf40e3585,0x106aa070);
244 &data_word(0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5);
245 &data_word(0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3);
246 &data_word(0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208);
247 &data_word(0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2);
248 &function_end_B("sha256_block_data_order");
249 &asciz("SHA256 block transform for x86, CRYPTOGAMS by <appro\@openssl.org>");