crypto/sha/asm/sha256-586.pl

   1 #!/usr/bin/env perl
   2 #
   3 # ====================================================================
   4 # Written by Andy Polyakov <appro@openssl.org> 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 improvement over compiler generated code varies from
  13 # 10% to 40% [see below]. Not very impressive on some µ-archs, but
  14 # it's 5 times smaller and optimizies amount of writes.
  15 #
  16 # May 2012.
  17 #
  18 # Optimization including two of Pavel Semjanov's ideas, alternative
  19 # Maj and full unroll, resulted in ~20-25% improvement on most CPUs,
  20 # ~10% on Pentium and P4, ~37% on Atom. As fully unrolled loop body is
  21 # almost 15x larger, 8KB vs. 560B, it's fired only for longer inputs.
  22 # But not on P4, where it kills performance, nor Sandy Bridge, where
  23 # folded loop is just as fast...
  24 #
  25 # Performance in clock cycles per processed byte (less is better):
  26 #
  27 #               Pentium PIII    P4      AMD K8  Core2   SB(**)  Atom
  28 # gcc           46      36      41      27      26      25      50
  29 # icc           57      33      38      25      23      -       -
  30 # x86 asm(*)    39/36   27/24   30      19/15.5 18/16   16(**)  30/26
  31 # x86_64 asm(***)       -       17.5    15      16      17.5    23
  32 #
  33 # (*)   numbers after slash are for unrolled loop, where available;
  34 # (**)  for Sandy Bridge executing code path with ror replaced with
  35 #       equivalent shrd;
  36 # (***) x86_64 assembly performance is presented for reference
  37 #       purposes.
  38
  39 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  40 push(@INC,"${dir}","${dir}../../perlasm");
  41 require "x86asm.pl";
  42
  43 &asm_init($ARGV[0],"sha512-586.pl",$ARGV[$#ARGV] eq "386");
  44
  45 $unroll_after = 1024;
  46
  47 $A="eax";
  48 $E="edx";
  49 $T="ebx";
  50 $Aoff=&DWP(4,"esp");
  51 $Boff=&DWP(8,"esp");
  52 $Coff=&DWP(12,"esp");
  53 $Doff=&DWP(16,"esp");
  54 $Eoff=&DWP(20,"esp");
  55 $Foff=&DWP(24,"esp");
  56 $Goff=&DWP(28,"esp");
  57 $Hoff=&DWP(32,"esp");
  58 $Xoff=&DWP(36,"esp");
  59 $K256="ebp";
  60
  61 sub BODY_16_63() {
  62         &mov    ($T,"ecx");                     # "ecx" is preloaded
  63          &mov   ("esi",&DWP(4*(9+15+16-14),"esp"));
  64         &ror    ("ecx",18-7);
  65          &mov   ("edi","esi");
  66         &ror    ("esi",19-17);
  67          &xor   ("ecx",$T);
  68         &shr    ($T,3);
  69          &xor   ("esi","edi");
  70         &ror    ("ecx",7);
  71          &xor   ($T,"ecx");                     # T = sigma0(X[-15])
  72         &ror    ("esi",17);
  73          &add   ($T,&DWP(4*(9+15+16),"esp"));   # T += X[-16]
  74         &shr    ("edi",10);
  75          &add   ($T,&DWP(4*(9+15+16-9),"esp")); # T += X[-7]
  76         #&xor   ("edi","esi")                   # sigma1(X[-2])
  77         # &add  ($T,"edi");                     # T += sigma1(X[-2])
  78         # &mov  (&DWP(4*(9+15),"esp"),$T);      # save X[0]
  79
  80         &BODY_00_15(1);
  81 }
  82 sub BODY_00_15() {
  83     my $in_16_63=shift;
  84
  85         &mov    ("ecx",$E);
  86          &xor   ("edi","esi")                   if ($in_16_63); # sigma1(X[-2])
  87          &mov   ("esi",$Foff);
  88         &ror    ("ecx",25-11);
  89          &add   ($T,"edi")                      if ($in_16_63); # T += sigma1(X[-2])
  90          &mov   ("edi",$Goff);
  91         &xor    ("ecx",$E);
  92          &xor   ("esi","edi");
  93          &mov   ($T,&DWP(4*(9+15),"esp"))       if (!$in_16_63);
  94          &mov   (&DWP(4*(9+15),"esp"),$T)       if ($in_16_63); # save X[0]
  95         &ror    ("ecx",11-6);
  96          &and   ("esi",$E);
  97          &mov   ($Eoff,$E);             # modulo-scheduled
  98         &xor    ($E,"ecx");
  99          &xor   ("esi","edi");          # Ch(e,f,g)
 100          &add   ($T,$Hoff);             # T += h
 101         &ror    ($E,6);                 # Sigma1(e)
 102          &mov   ("ecx",$A);
 103          &add   ($T,"esi");             # T += Ch(e,f,g)
 104
 105         &ror    ("ecx",22-13);
 106          &add   ($T,$E);                # T += Sigma1(e)
 107          &mov   ("edi",$Boff);
 108         &xor    ("ecx",$A);
 109          &mov   ($Aoff,$A);             # modulo-scheduled
 110          &lea   ("esp",&DWP(-4,"esp"));
 111         &ror    ("ecx",13-2);
 112          &mov   ("esi",&DWP(0,$K256));
 113         &xor    ("ecx",$A);
 114          &mov   ($E,$Eoff);             # e in next iteration, d in this one
 115          &xor   ($A,"edi");             # a ^= b
 116         &ror    ("ecx",2);              # Sigma0(a)
 117
 118          &add   ($T,"esi");             # T+= K[i]
 119          &mov   (&DWP(0,"esp"),$A);     # (b^c) in next round
 120         &add    ($E,$T);                # d += T
 121          &and   ($A,&DWP(4,"esp"));     # a &= (b^c)
 122         &add    ($T,"ecx");             # T += Sigma0(a)
 123          &xor   ($A,"edi");             # h = Maj(a,b,c) = Ch(a^b,c,b)
 124          &mov   ("ecx",&DWP(4*(9+15+16-1),"esp"))       if ($in_16_63); # preload T
 125         &add    ($K256,4);
 126          &add   ($A,$T);                # h += T
 127 }
 128
 129 &external_label("OPENSSL_ia32cap_P")            if (!$i386);
 130
 131 &function_begin("sha256_block_data_order");
 132         &mov    ("esi",wparam(0));      # ctx
 133         &mov    ("edi",wparam(1));      # inp
 134         &mov    ("eax",wparam(2));      # num
 135         &mov    ("ebx","esp");          # saved sp
 136
 137         &call   (&label("pic_point"));  # make it PIC!
 138 &set_label("pic_point");
 139         &blindpop($K256);
 140         &lea    ($K256,&DWP(&label("K256")."-".&label("pic_point"),$K256));
 141
 142         &sub    ("esp",16);
 143         &and    ("esp",-64);
 144
 145         &shl    ("eax",6);
 146         &add    ("eax","edi");
 147         &mov    (&DWP(0,"esp"),"esi");  # ctx
 148         &mov    (&DWP(4,"esp"),"edi");  # inp
 149         &mov    (&DWP(8,"esp"),"eax");  # inp+num*128
 150         &mov    (&DWP(12,"esp"),"ebx"); # saved sp
 151                                                 if (!$i386) {
 152         &picmeup("edx","OPENSSL_ia32cap_P",$K256,&label("K256"));
 153         &mov    ("ecx",&DWP(0,"edx"));
 154         &mov    ("edx",&DWP(4,"edx"));
 155         &test   ("ecx",1<<20);          # check for P4
 156         &jnz    (&label("loop"));
 157         &and    ("ecx",1<<30);          # mask "Intel CPU" bit
 158         &and    ("edx",1<<28);          # mask AVX bit
 159         &or     ("ecx","edx");
 160         &cmp    ("ecx",1<<28|1<<30);
 161         &je     (&label("loop_shrd"));
 162                                                 if ($unroll_after) {
 163         &sub    ("eax","edi");
 164         &cmp    ("eax",$unroll_after);
 165         &jge    (&label("unrolled"));
 166                                                 } }
 167         &jmp    (&label("loop"));
 168
 169 sub COMPACT_LOOP() {
 170 my $suffix=shift;
 171
 172 &set_label("loop$suffix",16);
 173     # copy input block to stack reversing byte and dword order
 174     for($i=0;$i<4;$i++) {
 175         &mov    ("eax",&DWP($i*16+0,"edi"));
 176         &mov    ("ebx",&DWP($i*16+4,"edi"));
 177         &mov    ("ecx",&DWP($i*16+8,"edi"));
 178         &bswap  ("eax");
 179         &mov    ("edx",&DWP($i*16+12,"edi"));
 180         &bswap  ("ebx");
 181         &push   ("eax");
 182         &bswap  ("ecx");
 183         &push   ("ebx");
 184         &bswap  ("edx");
 185         &push   ("ecx");
 186         &push   ("edx");
 187     }
 188         &add    ("edi",64);
 189         &lea    ("esp",&DWP(-4*9,"esp"));# place for A,B,C,D,E,F,G,H
 190         &mov    (&DWP(4*(9+16)+4,"esp"),"edi");
 191
 192         # copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
 193         &mov    ($A,&DWP(0,"esi"));
 194         &mov    ("ebx",&DWP(4,"esi"));
 195         &mov    ("ecx",&DWP(8,"esi"));
 196         &mov    ("edi",&DWP(12,"esi"));
 197         # &mov  ($Aoff,$A);
 198         &mov    ($Boff,"ebx");
 199         &xor    ("ebx","ecx");
 200         &mov    ($Coff,"ecx");
 201         &mov    ($Doff,"edi");
 202         &mov    (&DWP(0,"esp"),"ebx");  # magic
 203         &mov    ($E,&DWP(16,"esi"));
 204         &mov    ("ebx",&DWP(20,"esi"));
 205         &mov    ("ecx",&DWP(24,"esi"));
 206         &mov    ("edi",&DWP(28,"esi"));
 207         # &mov  ($Eoff,$E);
 208         &mov    ($Foff,"ebx");
 209         &mov    ($Goff,"ecx");
 210         &mov    ($Hoff,"edi");
 211
 212 &set_label("00_15$suffix",16);
 213
 214         &BODY_00_15();
 215
 216         &cmp    ("esi",0xc19bf174);
 217         &jne    (&label("00_15$suffix"));
 218
 219         &mov    ("ecx",&DWP(4*(9+15+16-1),"esp"));      # preloaded in BODY_00_15(1)
 220         &jmp    (&label("16_63$suffix"));
 221
 222 &set_label("16_63$suffix",16);
 223
 224         &BODY_16_63();
 225
 226         &cmp    ("esi",0xc67178f2);
 227         &jne    (&label("16_63$suffix"));
 228
 229         &mov    ("esi",&DWP(4*(9+16+64)+0,"esp"));#ctx
 230         # &mov  ($A,$Aoff);
 231         &mov    ("ebx",$Boff);
 232         # &mov  ("edi",$Coff);
 233         &mov    ("ecx",$Doff);
 234         &add    ($A,&DWP(0,"esi"));
 235         &add    ("ebx",&DWP(4,"esi"));
 236         &add    ("edi",&DWP(8,"esi"));
 237         &add    ("ecx",&DWP(12,"esi"));
 238         &mov    (&DWP(0,"esi"),$A);
 239         &mov    (&DWP(4,"esi"),"ebx");
 240         &mov    (&DWP(8,"esi"),"edi");
 241         &mov    (&DWP(12,"esi"),"ecx");
 242         # &mov  ($E,$Eoff);
 243         &mov    ("eax",$Foff);
 244         &mov    ("ebx",$Goff);
 245         &mov    ("ecx",$Hoff);
 246         &mov    ("edi",&DWP(4*(9+16+64)+4,"esp"));#inp
 247         &add    ($E,&DWP(16,"esi"));
 248         &add    ("eax",&DWP(20,"esi"));
 249         &add    ("ebx",&DWP(24,"esi"));
 250         &add    ("ecx",&DWP(28,"esi"));
 251         &mov    (&DWP(16,"esi"),$E);
 252         &mov    (&DWP(20,"esi"),"eax");
 253         &mov    (&DWP(24,"esi"),"ebx");
 254         &mov    (&DWP(28,"esi"),"ecx");
 255
 256         &lea    ("esp",&DWP(4*(9+16+64),"esp"));# destroy frame
 257         &sub    ($K256,4*64);                   # rewind K
 258
 259         &cmp    ("edi",&DWP(8,"esp"));          # are we done yet?
 260         &jb     (&label("loop$suffix"));
 261 }
 262         &COMPACT_LOOP();
 263         &mov    ("esp",&DWP(12,"esp"));         # restore sp
 264 &function_end_A();
 265                                                 if (!$i386) {
 266         # ~20% improvement on Sandy Bridge
 267         local *ror = sub { &shrd(@_[0],@_) };
 268         &COMPACT_LOOP("_shrd");
 269         &mov    ("esp",&DWP(12,"esp"));         # restore sp
 270 &function_end_A();
 271                                                 }
 272
 273 &set_label("K256",64);  # Yes! I keep it in the code segment!
 274 @K256=( 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,
 275         0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
 276         0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,
 277         0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
 278         0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,
 279         0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
 280         0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,
 281         0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
 282         0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,
 283         0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
 284         0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,
 285         0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
 286         0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,
 287         0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
 288         0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,
 289         0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2     );
 290 &data_word(@K256);
 291
 292 if (!$i386 && $unroll_after) {
 293 my @AH=($A,$K256);
 294
 295 &set_label("unrolled",16);
 296         &lea    ("esp",&DWP(-96,"esp"));
 297         # copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
 298         &mov    ($AH[0],&DWP(0,"esi"));
 299         &mov    ($AH[1],&DWP(4,"esi"));
 300         &mov    ("ecx",&DWP(8,"esi"));
 301         &mov    ("ebx",&DWP(12,"esi"));
 302         #&mov   (&DWP(0,"esp"),$AH[0]);
 303         &mov    (&DWP(4,"esp"),$AH[1]);
 304         &xor    ($AH[1],"ecx");         # magic
 305         &mov    (&DWP(8,"esp"),"ecx");
 306         &mov    (&DWP(12,"esp"),"ebx");
 307         &mov    ($E,&DWP(16,"esi"));
 308         &mov    ("ebx",&DWP(20,"esi"));
 309         &mov    ("ecx",&DWP(24,"esi"));
 310         &mov    ("esi",&DWP(28,"esi"));
 311         #&mov   (&DWP(16,"esp"),$E);
 312         &mov    (&DWP(20,"esp"),"ebx");
 313         &mov    (&DWP(24,"esp"),"ecx");
 314         &mov    (&DWP(28,"esp"),"esi");
 315         &jmp    (&label("grand_loop"));
 316
 317 &set_label("grand_loop",16);
 318     # copy input block to stack reversing byte order
 319     for($i=0;$i<5;$i++) {
 320         &mov    ("ebx",&DWP(12*$i+0,"edi"));
 321         &mov    ("ecx",&DWP(12*$i+4,"edi"));
 322         &bswap  ("ebx");
 323         &mov    ("esi",&DWP(12*$i+8,"edi"));
 324         &bswap  ("ecx");
 325         &mov    (&DWP(32+12*$i+0,"esp"),"ebx");
 326         &bswap  ("esi");
 327         &mov    (&DWP(32+12*$i+4,"esp"),"ecx");
 328         &mov    (&DWP(32+12*$i+8,"esp"),"esi");
 329     }
 330         &mov    ("ebx",&DWP($i*12,"edi"));
 331         &add    ("edi",64);
 332         &bswap  ("ebx");
 333         &mov    (&DWP(96+4,"esp"),"edi");
 334         &mov    (&DWP(32+12*$i,"esp"),"ebx");
 335
 336     my ($a,$b,$c,$d,$e,$f,$g,$h)=(0..7);        # offsets
 337     sub off { &DWP(4*(((shift)-$i)&7),"esp"); }
 338
 339     for ($i=0;$i<64;$i++) {
 340
 341       if ($i>=16) {
 342         &mov    ($T,"ecx");                     # "ecx" is preloaded
 343         # &mov  ("esi",&DWP(32+4*(($i+14)&15),"esp"));
 344         &ror    ("ecx",18-7);
 345          &mov   ("edi","esi");
 346         &ror    ("esi",19-17);
 347          &xor   ("ecx",$T);
 348         &shr    ($T,3);
 349          &xor   ("esi","edi");
 350         &ror    ("ecx",7);
 351          &xor   ($T,"ecx");                     # T = sigma0(X[-15])
 352         &ror    ("esi",17);
 353          &add   ($T,&DWP(32+4*($i&15),"esp"));  # T += X[-16]
 354         &shr    ("edi",10);
 355          &add   ($T,&DWP(32+4*(($i+9)&15),"esp"));      # T += X[-7]
 356         #&xor   ("edi","esi")                   # sigma1(X[-2])
 357         # &add  ($T,"edi");                     # T += sigma1(X[-2])
 358         # &mov  (&DWP(4*(9+15),"esp"),$T);      # save X[0]
 359       }
 360         &mov    ("ecx",$E);
 361          &xor   ("edi","esi")                   if ($i>=16);    # sigma1(X[-2])
 362          &mov   ("esi",&off($f));
 363         &ror    ("ecx",25-11);
 364          &add   ($T,"edi")                      if ($i>=16);    # T += sigma1(X[-2])
 365          &mov   ("edi",&off($g));
 366         &xor    ("ecx",$E);
 367          &xor   ("esi","edi");
 368          &mov   ($T,&DWP(32+4*($i&15),"esp"))   if ($i<16);     # X[i]
 369          &mov   (&DWP(32+4*($i&15),"esp"),$T)   if ($i>=16);    # save X[0]
 370         &ror    ("ecx",11-6);
 371          &and   ("esi",$E);
 372          &mov   (&off($e),$E);          # modulo-scheduled
 373         &xor    ($E,"ecx");
 374          &xor   ("esi","edi");          # Ch(e,f,g)
 375          &add   ($T,&off($h));          # T += h
 376         &ror    ($E,6);                 # Sigma1(e)
 377          &mov   ("ecx",$AH[0]);
 378          &add   ($T,"esi");             # T += Ch(e,f,g)
 379
 380         &ror    ("ecx",22-13);
 381          &mov   ("edi",&off($b));
 382         &xor    ("ecx",$AH[0]);
 383          &mov   (&off($a),$AH[0]);      # modulo-scheduled
 384         &ror    ("ecx",13-2);
 385          &lea   ($T,&DWP(@K256[$i],$T,$E));     # T += Sigma1(1)+K[i]
 386          &mov   ($E,&off($d));          # e in next iteration, d in this one
 387         &xor    ("ecx",$AH[0]);
 388          &xor   ($AH[0],"edi");         # a ^= b, (b^c) in next round
 389         &ror    ("ecx",2);              # Sigma0(a)
 390
 391         &add    ($E,$T);                # d += T
 392          &and   ($AH[1],$AH[0]);        # a &= (b^c)
 393         &add    ($T,"ecx");             # T += Sigma0(a)
 394          &mov   ("ecx",&DWP(32+4*(($i+2)&15),"esp"))    if ($i>=15 && $i<63);
 395         &xor    ($AH[1],"edi");         # h = Maj(a,b,c) = Ch(a^b,c,b)
 396          &mov   ("esi",&DWP(32+4*(($i+15)&15),"esp"))   if ($i>=15 && $i<63);
 397         &add    ($AH[1],$T);            # h += T
 398
 399         unshift(@AH,pop(@AH));          # rotate(a,h)
 400     }
 401         &mov    ("esi",&DWP(96,"esp")); #ctx
 402                                         #&mov   ($AH[0],&DWP(0,"esp"));
 403         &xor    ($AH[1],"edi");         #&mov   ($AH[1],&DWP(4,"esp"));
 404                                         #&mov   ("edi", &DWP(8,"esp"));
 405         &mov    ("ecx",&DWP(12,"esp"));
 406         &add    ($AH[0],&DWP(0,"esi"));
 407         &add    ($AH[1],&DWP(4,"esi"));
 408         &add    ("edi",&DWP(8,"esi"));
 409         &add    ("ecx",&DWP(12,"esi"));
 410         &mov    (&DWP(0,"esi"),$AH[0]);
 411         &mov    (&DWP(4,"esi"),$AH[1]);
 412         &mov    (&DWP(8,"esi"),"edi");
 413         &mov    (&DWP(12,"esi"),"ecx");
 414          #&mov  (&DWP(0,"esp"),$AH[0]);
 415          &mov   (&DWP(4,"esp"),$AH[1]);
 416          &xor   ($AH[1],"edi");         # magic
 417          &mov   (&DWP(8,"esp"),"edi");
 418          &mov   (&DWP(12,"esp"),"ecx");
 419         #&mov   ($E,&DWP(16,"esp"));
 420         &mov    ("edi",&DWP(20,"esp"));
 421         &mov    ("ebx",&DWP(24,"esp"));
 422         &mov    ("ecx",&DWP(28,"esp"));
 423         &add    ($E,&DWP(16,"esi"));
 424         &add    ("edi",&DWP(20,"esi"));
 425         &add    ("ebx",&DWP(24,"esi"));
 426         &add    ("ecx",&DWP(28,"esi"));
 427         &mov    (&DWP(16,"esi"),$E);
 428         &mov    (&DWP(20,"esi"),"edi");
 429         &mov    (&DWP(24,"esi"),"ebx");
 430         &mov    (&DWP(28,"esi"),"ecx");
 431          #&mov  (&DWP(16,"esp"),$E);
 432          &mov   (&DWP(20,"esp"),"edi");
 433         &mov    ("edi",&DWP(96+4,"esp"));       # inp
 434          &mov   (&DWP(24,"esp"),"ebx");
 435          &mov   (&DWP(28,"esp"),"ecx");
 436
 437         &cmp    ("edi",&DWP(96+8,"esp"));       # are we done yet?
 438         &jb     (&label("grand_loop"));
 439
 440         &mov    ("esp",&DWP(96+12,"esp"));      # restore sp
 441 &function_end_A();
 442 }
 443 &function_end_B("sha256_block_data_order");
 444 &asciz("SHA256 block transform for x86, CRYPTOGAMS by <appro\@openssl.org>");
 445
 446 &asm_finish();