crypto/sha/asm/sha1-586.pl

   1 #!/usr/local/bin/perl
   2
   3 $normal=0;
   4
   5 push(@INC,"perlasm","../../perlasm");
   6 require "x86asm.pl";
   7
   8 &asm_init($ARGV[0],"sha1-586.pl",$ARGV[$#ARGV] eq "386");
   9
  10 $A="eax";
  11 $B="ecx";
  12 $C="ebx";
  13 $D="edx";
  14 $E="edi";
  15 $T="esi";
  16 $tmp1="ebp";
  17
  18 $off=9*4;
  19
  20 @K=(0x5a827999,0x6ed9eba1,0x8f1bbcdc,0xca62c1d6);
  21
  22 &sha1_block_data("sha1_block_asm_data_order");
  23
  24 &asm_finish();
  25
  26 sub Nn
  27         {
  28         local($p)=@_;
  29         local(%n)=($A,$T,$B,$A,$C,$B,$D,$C,$E,$D,$T,$E);
  30         return($n{$p});
  31         }
  32
  33 sub Np
  34         {
  35         local($p)=@_;
  36         local(%n)=($A,$T,$B,$A,$C,$B,$D,$C,$E,$D,$T,$E);
  37         local(%n)=($A,$B,$B,$C,$C,$D,$D,$E,$E,$T,$T,$A);
  38         return($n{$p});
  39         }
  40
  41 sub Na
  42         {
  43         local($n)=@_;
  44         return( (($n   )&0x0f),
  45                 (($n+ 2)&0x0f),
  46                 (($n+ 8)&0x0f),
  47                 (($n+13)&0x0f),
  48                 (($n+ 1)&0x0f));
  49         }
  50
  51 sub X_expand
  52         {
  53         local($in)=@_;
  54
  55         &comment("First, load the words onto the stack in network byte order");
  56         for ($i=0; $i<16; $i+=2)
  57                 {
  58                 &mov($A,&DWP(($i+0)*4,$in,"",0));# unless $i == 0;
  59                  &mov($B,&DWP(($i+1)*4,$in,"",0));
  60                 &bswap($A);
  61                  &bswap($B);
  62                 &mov(&swtmp($i+0),$A);
  63                  &mov(&swtmp($i+1),$B);
  64                 }
  65
  66         &comment("We now have the X array on the stack");
  67         &comment("starting at sp-4");
  68         }
  69
  70 # Rules of engagement
  71 # F is always trashable at the start, the running total.
  72 # E becomes the next F so it can be trashed after it has been 'accumulated'
  73 # F becomes A in the next round.  We don't need to access it much.
  74 # During the X update part, the result ends up in $X[$n0].
  75
  76 sub BODY_00_15
  77         {
  78         local($pos,$K,$X,$n,$a,$b,$c,$d,$e,$f)=@_;
  79
  80 return if $n & 1;
  81         &comment("00_15 $n");
  82
  83          &mov($f,$c);
  84
  85         &mov($tmp1,$a);
  86          &xor($f,$d);                   # F2
  87
  88         &rotl($tmp1,5);                 # A2
  89
  90         &and($f,$b);                    # F3
  91          &add($tmp1,$e);
  92
  93         &rotr($b,1);                    # B1    <- F
  94          &mov($e,&swtmp($n));           # G1
  95
  96         &rotr($b,1);                    # B1    <- F
  97          &xor($f,$d);                   # F4
  98
  99         &lea($tmp1,&DWP($K,$tmp1,$e,1));
 100
 101 ############################
 102 #       &BODY_40_59( 0,$K[2],$X,42,$A,$B,$C,$D,$E,$T);
 103 #       &BODY_40_59( 0,$K[2],$X,43,$T,$A,$B,$C,$D,$E);
 104 $n++;
 105         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 106         ($b,$c,$d,$e,$f,$a)=($a,$b,$c,$d,$e,$f);
 107
 108          &mov($f,$c);
 109
 110         &add($a,$tmp1);         # MOVED DOWN
 111          &xor($f,$d);                   # F2
 112
 113         &mov($tmp1,$a);
 114          &and($f,$b);                   # F3
 115
 116         &rotl($tmp1,5);                 # A2
 117
 118         &add($tmp1,$e);
 119          &mov($e,&swtmp($n));           # G1
 120
 121         &rotr($b,1);                    # B1    <- F
 122          &xor($f,$d);                   # F4
 123
 124         &rotr($b,1);                    # B1    <- F
 125          &lea($tmp1,&DWP($K,$tmp1,$e,1));
 126
 127         &add($f,$tmp1);
 128         }
 129
 130 sub BODY_16_19
 131         {
 132         local($pos,$K,$X,$n,$a,$b,$c,$d,$e,$f)=@_;
 133         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 134
 135 return if $n & 1;
 136         &comment("16_19 $n");
 137
 138  &nop() if ($pos < 0);
 139 &mov($tmp1,&swtmp($n0));                        # X1
 140  &mov($f,&swtmp($n1));                  # X2
 141 &xor($f,$tmp1);                         # X3
 142  &mov($tmp1,&swtmp($n2));               # X4
 143 &xor($f,$tmp1);                         # X5
 144  &mov($tmp1,&swtmp($n3));               # X6
 145 &xor($f,$tmp1);                         # X7 - slot
 146  &mov($tmp1,$c);                        # F1
 147 &rotl($f,1);                            # X8 - slot
 148  &xor($tmp1,$d);                        # F2
 149 &mov(&swtmp($n0),$f);                   # X9 - anytime
 150  &and($tmp1,$b);                        # F3
 151 &lea($f,&DWP($K,$f,$e,1));              # tot=X+K+e
 152  &xor($tmp1,$d);                                # F4
 153 &mov($e,$a);                            # A1
 154  &add($f,$tmp1);                        # tot+=F();
 155
 156 &rotl($e,5);                            # A2
 157
 158 &rotr($b,1);                            # B1    <- F
 159  &add($f,$e);                           # tot+=a
 160
 161 ############################
 162 #       &BODY_40_59( 0,$K[2],$X,42,$A,$B,$C,$D,$E,$T);
 163 #       &BODY_40_59( 0,$K[2],$X,43,$T,$A,$B,$C,$D,$E);
 164 $n++;
 165         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 166         ($b,$c,$d,$e,$f,$a)=($a,$b,$c,$d,$e,$f);
 167
 168
 169 &mov($f,&swtmp($n0));                   # X1
 170  &mov($tmp1,&swtmp($n1));               # X2
 171 &xor($f,$tmp1);                         # X3
 172  &mov($tmp1,&swtmp($n2));               # X4
 173 &xor($f,$tmp1);                         # X5
 174  &mov($tmp1,&swtmp($n3));               # X6
 175 &rotr($c,1); #&rotr($b,1);              # B1    <- F # MOVED DOWN
 176  &xor($f,$tmp1);                                # X7 - slot
 177 &rotl($f,1);                            # X8 - slot
 178  &mov($tmp1,$c);                        # F1
 179 &xor($tmp1,$d);                 # F2
 180  &mov(&swtmp($n0),$f);                  # X9 - anytime
 181 &and($tmp1,$b);                 # F3
 182  &lea($f,&DWP($K,$f,$e,1));             # tot=X+K+e
 183
 184 &xor($tmp1,$d);                         # F4
 185  &mov($e,$a);                           # A1
 186
 187 &rotl($e,5);                            # A2
 188
 189 &rotr($b,1);                            # B1    <- F
 190  &add($f,$e);                           # tot+=a
 191
 192 &rotr($b,1);                            # B1    <- F
 193  &add($f,$tmp1);                        # tot+=F();
 194
 195         }
 196
 197 sub BODY_20_39
 198         {
 199         local($pos,$K,$X,$n,$a,$b,$c,$d,$e,$f)=@_;
 200
 201         &comment("20_39 $n");
 202         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 203
 204 &mov($f,&swtmp($n0));                   # X1
 205  &mov($tmp1,&swtmp($n1));               # X2
 206 &xor($f,$tmp1);                         # X3
 207  &mov($tmp1,&swtmp($n2));               # X4
 208 &xor($f,$tmp1);                         # X5
 209  &mov($tmp1,&swtmp($n3));               # X6
 210 &xor($f,$tmp1);                         # X7 - slot
 211  &mov($tmp1,$b);                        # F1
 212 &rotl($f,1);                            # X8 - slot
 213  &xor($tmp1,$c);                        # F2
 214 &mov(&swtmp($n0),$f);                   # X9 - anytime
 215  &xor($tmp1,$d);                        # F3
 216
 217 &lea($f,&DWP($K,$f,$e,1));              # tot=X+K+e
 218  &mov($e,$a);                           # A1
 219
 220 &rotl($e,5);                            # A2
 221
 222 if ($n != 79) # last loop
 223         {
 224         &rotr($b,1);                            # B1    <- F
 225          &add($e,$tmp1);                        # tmp1=F()+a
 226
 227         &rotr($b,1);                            # B2    <- F
 228          &add($f,$e);                           # tot+=tmp1;
 229         }
 230 else
 231         {
 232         &add($e,$tmp1);                         # tmp1=F()+a
 233          &mov($tmp1,&wparam(0));
 234
 235         &rotr($b,1);                            # B1    <- F
 236          &add($f,$e);                           # tot+=tmp1;
 237
 238         &rotr($b,1);                            # B2    <- F
 239         }
 240         }
 241
 242 sub BODY_40_59
 243         {
 244         local($pos,$K,$X,$n,$a,$b,$c,$d,$e,$f)=@_;
 245
 246         &comment("40_59 $n");
 247         return if $n & 1;
 248         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 249
 250 &mov($f,&swtmp($n0));                   # X1
 251  &mov($tmp1,&swtmp($n1));               # X2
 252 &xor($f,$tmp1);                         # X3
 253  &mov($tmp1,&swtmp($n2));               # X4
 254 &xor($f,$tmp1);                         # X5
 255  &mov($tmp1,&swtmp($n3));               # X6
 256 &xor($f,$tmp1);                         # X7 - slot
 257  &mov($tmp1,$b);                        # F1
 258 &rotl($f,1);                            # X8 - slot
 259  &or($tmp1,$c);                         # F2
 260 &mov(&swtmp($n0),$f);                   # X9 - anytime
 261  &and($tmp1,$d);                        # F3
 262
 263 &lea($f,&DWP($K,$f,$e,1));              # tot=X+K+e
 264  &mov($e,$b);                           # F4
 265
 266 &rotr($b,1);                            # B1    <- F
 267  &and($e,$c);                           # F5
 268
 269 &or($tmp1,$e);                          # F6
 270  &mov($e,$a);                           # A1
 271
 272 &rotl($e,5);                            # A2
 273
 274 &add($tmp1,$e);                 # tmp1=F()+a
 275
 276 ############################
 277 #       &BODY_40_59( 0,$K[2],$X,42,$A,$B,$C,$D,$E,$T);
 278 #       &BODY_40_59( 0,$K[2],$X,43,$T,$A,$B,$C,$D,$E);
 279 $n++;
 280         local($n0,$n1,$n2,$n3,$np)=&Na($n);
 281         ($b,$c,$d,$e,$f,$a)=($a,$b,$c,$d,$e,$f);
 282
 283  &mov($f,&swtmp($n0));                  # X1
 284 &add($a,$tmp1);                         # tot+=tmp1; # moved was add f,tmp1
 285  &mov($tmp1,&swtmp($n1));               # X2
 286 &xor($f,$tmp1);                         # X3
 287  &mov($tmp1,&swtmp($n2));               # X4
 288 &xor($f,$tmp1);                         # X5
 289  &mov($tmp1,&swtmp($n3));               # X6
 290 &rotr($c,1);                            # B2    <- F # moved was rotr b,1
 291  &xor($f,$tmp1);                        # X7 - slot
 292 &rotl($f,1);                            # X8 - slot
 293  &mov($tmp1,$b);                        # F1
 294 &mov(&swtmp($n0),$f);                   # X9 - anytime
 295  &or($tmp1,$c);                         # F2
 296 &lea($f,&DWP($K,$f,$e,1));              # tot=X+K+e
 297  &mov($e,$b);                           # F4
 298 &and($tmp1,$d);                         # F3
 299  &and($e,$c);                           # F5
 300
 301 &or($tmp1,$e);                          # F6
 302  &mov($e,$a);                           # A1
 303
 304 &rotl($e,5);                            # A2
 305
 306 &rotr($b,1);                            # B1    <- F
 307  &add($tmp1,$e);                        # tmp1=F()+a
 308
 309 &rotr($b,1);                            # B2    <- F
 310  &add($f,$tmp1);                        # tot+=tmp1;
 311         }
 312
 313 sub BODY_60_79
 314         {
 315         &BODY_20_39(@_);
 316         }
 317
 318 sub sha1_block_host
 319         {
 320         local($name, $sclabel)=@_;
 321
 322         &function_begin_B($name,"");
 323
 324         # parameter 1 is the MD5_CTX structure.
 325         # A     0
 326         # B     4
 327         # C     8
 328         # D     12
 329         # E     16
 330
 331         &mov("ecx",     &wparam(2));
 332          &push("esi");
 333         &shl("ecx",6);
 334          &mov("esi",    &wparam(1));
 335         &push("ebp");
 336          &add("ecx","esi");     # offset to leave on
 337         &push("ebx");
 338          &mov("ebp",    &wparam(0));
 339         &push("edi");
 340          &mov($D,       &DWP(12,"ebp","",0));
 341         &stack_push(18+9);
 342          &mov($E,       &DWP(16,"ebp","",0));
 343         &mov($C,        &DWP( 8,"ebp","",0));
 344          &mov(&swtmp(17),"ecx");
 345
 346         &comment("First we need to setup the X array");
 347
 348         for ($i=0; $i<16; $i+=2)
 349                 {
 350                 &mov($A,&DWP(($i+0)*4,"esi","",0));# unless $i == 0;
 351                  &mov($B,&DWP(($i+1)*4,"esi","",0));
 352                 &mov(&swtmp($i+0),$A);
 353                  &mov(&swtmp($i+1),$B);
 354                 }
 355         &jmp($sclabel);
 356         &function_end_B($name);
 357         }
 358
 359
 360 sub sha1_block_data
 361         {
 362         local($name)=@_;
 363
 364         &function_begin_B($name,"");
 365
 366         # parameter 1 is the MD5_CTX structure.
 367         # A     0
 368         # B     4
 369         # C     8
 370         # D     12
 371         # E     16
 372
 373         &mov("ecx",     &wparam(2));
 374          &push("esi");
 375         &shl("ecx",6);
 376          &mov("esi",    &wparam(1));
 377         &push("ebp");
 378          &add("ecx","esi");     # offset to leave on
 379         &push("ebx");
 380          &mov("ebp",    &wparam(0));
 381         &push("edi");
 382          &mov($D,       &DWP(12,"ebp","",0));
 383         &stack_push(18+9);
 384          &mov($E,       &DWP(16,"ebp","",0));
 385         &mov($C,        &DWP( 8,"ebp","",0));
 386          &mov(&swtmp(17),"ecx");
 387
 388         &comment("First we need to setup the X array");
 389
 390         &set_label("start") unless $normal;
 391
 392         &X_expand("esi");
 393          &mov(&wparam(1),"esi");
 394
 395         &set_label("shortcut", 0, 1);
 396         &comment("");
 397         &comment("Start processing");
 398
 399         # odd start
 400         &mov($A,        &DWP( 0,"ebp","",0));
 401          &mov($B,       &DWP( 4,"ebp","",0));
 402         $X="esp";
 403         &BODY_00_15(-2,$K[0],$X, 0,$A,$B,$C,$D,$E,$T);
 404         &BODY_00_15( 0,$K[0],$X, 1,$T,$A,$B,$C,$D,$E);
 405         &BODY_00_15( 0,$K[0],$X, 2,$E,$T,$A,$B,$C,$D);
 406         &BODY_00_15( 0,$K[0],$X, 3,$D,$E,$T,$A,$B,$C);
 407         &BODY_00_15( 0,$K[0],$X, 4,$C,$D,$E,$T,$A,$B);
 408         &BODY_00_15( 0,$K[0],$X, 5,$B,$C,$D,$E,$T,$A);
 409         &BODY_00_15( 0,$K[0],$X, 6,$A,$B,$C,$D,$E,$T);
 410         &BODY_00_15( 0,$K[0],$X, 7,$T,$A,$B,$C,$D,$E);
 411         &BODY_00_15( 0,$K[0],$X, 8,$E,$T,$A,$B,$C,$D);
 412         &BODY_00_15( 0,$K[0],$X, 9,$D,$E,$T,$A,$B,$C);
 413         &BODY_00_15( 0,$K[0],$X,10,$C,$D,$E,$T,$A,$B);
 414         &BODY_00_15( 0,$K[0],$X,11,$B,$C,$D,$E,$T,$A);
 415         &BODY_00_15( 0,$K[0],$X,12,$A,$B,$C,$D,$E,$T);
 416         &BODY_00_15( 0,$K[0],$X,13,$T,$A,$B,$C,$D,$E);
 417         &BODY_00_15( 0,$K[0],$X,14,$E,$T,$A,$B,$C,$D);
 418         &BODY_00_15( 1,$K[0],$X,15,$D,$E,$T,$A,$B,$C);
 419         &BODY_16_19(-1,$K[0],$X,16,$C,$D,$E,$T,$A,$B);
 420         &BODY_16_19( 0,$K[0],$X,17,$B,$C,$D,$E,$T,$A);
 421         &BODY_16_19( 0,$K[0],$X,18,$A,$B,$C,$D,$E,$T);
 422         &BODY_16_19( 1,$K[0],$X,19,$T,$A,$B,$C,$D,$E);
 423
 424         &BODY_20_39(-1,$K[1],$X,20,$E,$T,$A,$B,$C,$D);
 425         &BODY_20_39( 0,$K[1],$X,21,$D,$E,$T,$A,$B,$C);
 426         &BODY_20_39( 0,$K[1],$X,22,$C,$D,$E,$T,$A,$B);
 427         &BODY_20_39( 0,$K[1],$X,23,$B,$C,$D,$E,$T,$A);
 428         &BODY_20_39( 0,$K[1],$X,24,$A,$B,$C,$D,$E,$T);
 429         &BODY_20_39( 0,$K[1],$X,25,$T,$A,$B,$C,$D,$E);
 430         &BODY_20_39( 0,$K[1],$X,26,$E,$T,$A,$B,$C,$D);
 431         &BODY_20_39( 0,$K[1],$X,27,$D,$E,$T,$A,$B,$C);
 432         &BODY_20_39( 0,$K[1],$X,28,$C,$D,$E,$T,$A,$B);
 433         &BODY_20_39( 0,$K[1],$X,29,$B,$C,$D,$E,$T,$A);
 434         &BODY_20_39( 0,$K[1],$X,30,$A,$B,$C,$D,$E,$T);
 435         &BODY_20_39( 0,$K[1],$X,31,$T,$A,$B,$C,$D,$E);
 436         &BODY_20_39( 0,$K[1],$X,32,$E,$T,$A,$B,$C,$D);
 437         &BODY_20_39( 0,$K[1],$X,33,$D,$E,$T,$A,$B,$C);
 438         &BODY_20_39( 0,$K[1],$X,34,$C,$D,$E,$T,$A,$B);
 439         &BODY_20_39( 0,$K[1],$X,35,$B,$C,$D,$E,$T,$A);
 440         &BODY_20_39( 0,$K[1],$X,36,$A,$B,$C,$D,$E,$T);
 441         &BODY_20_39( 0,$K[1],$X,37,$T,$A,$B,$C,$D,$E);
 442         &BODY_20_39( 0,$K[1],$X,38,$E,$T,$A,$B,$C,$D);
 443         &BODY_20_39( 1,$K[1],$X,39,$D,$E,$T,$A,$B,$C);
 444
 445         &BODY_40_59(-1,$K[2],$X,40,$C,$D,$E,$T,$A,$B);
 446         &BODY_40_59( 0,$K[2],$X,41,$B,$C,$D,$E,$T,$A);
 447         &BODY_40_59( 0,$K[2],$X,42,$A,$B,$C,$D,$E,$T);
 448         &BODY_40_59( 0,$K[2],$X,43,$T,$A,$B,$C,$D,$E);
 449         &BODY_40_59( 0,$K[2],$X,44,$E,$T,$A,$B,$C,$D);
 450         &BODY_40_59( 0,$K[2],$X,45,$D,$E,$T,$A,$B,$C);
 451         &BODY_40_59( 0,$K[2],$X,46,$C,$D,$E,$T,$A,$B);
 452         &BODY_40_59( 0,$K[2],$X,47,$B,$C,$D,$E,$T,$A);
 453         &BODY_40_59( 0,$K[2],$X,48,$A,$B,$C,$D,$E,$T);
 454         &BODY_40_59( 0,$K[2],$X,49,$T,$A,$B,$C,$D,$E);
 455         &BODY_40_59( 0,$K[2],$X,50,$E,$T,$A,$B,$C,$D);
 456         &BODY_40_59( 0,$K[2],$X,51,$D,$E,$T,$A,$B,$C);
 457         &BODY_40_59( 0,$K[2],$X,52,$C,$D,$E,$T,$A,$B);
 458         &BODY_40_59( 0,$K[2],$X,53,$B,$C,$D,$E,$T,$A);
 459         &BODY_40_59( 0,$K[2],$X,54,$A,$B,$C,$D,$E,$T);
 460         &BODY_40_59( 0,$K[2],$X,55,$T,$A,$B,$C,$D,$E);
 461         &BODY_40_59( 0,$K[2],$X,56,$E,$T,$A,$B,$C,$D);
 462         &BODY_40_59( 0,$K[2],$X,57,$D,$E,$T,$A,$B,$C);
 463         &BODY_40_59( 0,$K[2],$X,58,$C,$D,$E,$T,$A,$B);
 464         &BODY_40_59( 1,$K[2],$X,59,$B,$C,$D,$E,$T,$A);
 465
 466         &BODY_60_79(-1,$K[3],$X,60,$A,$B,$C,$D,$E,$T);
 467         &BODY_60_79( 0,$K[3],$X,61,$T,$A,$B,$C,$D,$E);
 468         &BODY_60_79( 0,$K[3],$X,62,$E,$T,$A,$B,$C,$D);
 469         &BODY_60_79( 0,$K[3],$X,63,$D,$E,$T,$A,$B,$C);
 470         &BODY_60_79( 0,$K[3],$X,64,$C,$D,$E,$T,$A,$B);
 471         &BODY_60_79( 0,$K[3],$X,65,$B,$C,$D,$E,$T,$A);
 472         &BODY_60_79( 0,$K[3],$X,66,$A,$B,$C,$D,$E,$T);
 473         &BODY_60_79( 0,$K[3],$X,67,$T,$A,$B,$C,$D,$E);
 474         &BODY_60_79( 0,$K[3],$X,68,$E,$T,$A,$B,$C,$D);
 475         &BODY_60_79( 0,$K[3],$X,69,$D,$E,$T,$A,$B,$C);
 476         &BODY_60_79( 0,$K[3],$X,70,$C,$D,$E,$T,$A,$B);
 477         &BODY_60_79( 0,$K[3],$X,71,$B,$C,$D,$E,$T,$A);
 478         &BODY_60_79( 0,$K[3],$X,72,$A,$B,$C,$D,$E,$T);
 479         &BODY_60_79( 0,$K[3],$X,73,$T,$A,$B,$C,$D,$E);
 480         &BODY_60_79( 0,$K[3],$X,74,$E,$T,$A,$B,$C,$D);
 481         &BODY_60_79( 0,$K[3],$X,75,$D,$E,$T,$A,$B,$C);
 482         &BODY_60_79( 0,$K[3],$X,76,$C,$D,$E,$T,$A,$B);
 483         &BODY_60_79( 0,$K[3],$X,77,$B,$C,$D,$E,$T,$A);
 484         &BODY_60_79( 0,$K[3],$X,78,$A,$B,$C,$D,$E,$T);
 485         &BODY_60_79( 2,$K[3],$X,79,$T,$A,$B,$C,$D,$E);
 486
 487         &comment("End processing");
 488         &comment("");
 489         # D is the tmp value
 490
 491         # E -> A
 492         # T -> B
 493         # A -> C
 494         # B -> D
 495         # C -> E
 496         # D -> T
 497
 498         # The last 2 have been moved into the last loop
 499         # &mov($tmp1,&wparam(0));
 500
 501          &mov($D,       &DWP(12,$tmp1,"",0));
 502         &add($D,$B);
 503          &mov($B,       &DWP( 4,$tmp1,"",0));
 504         &add($B,$T);
 505          &mov($T,       $A);
 506         &mov($A,        &DWP( 0,$tmp1,"",0));
 507          &mov(&DWP(12,$tmp1,"",0),$D);
 508
 509         &add($A,$E);
 510          &mov($E,       &DWP(16,$tmp1,"",0));
 511         &add($E,$C);
 512          &mov($C,       &DWP( 8,$tmp1,"",0));
 513         &add($C,$T);
 514
 515          &mov(&DWP( 0,$tmp1,"",0),$A);
 516         &mov("esi",&wparam(1));
 517          &mov(&DWP( 8,$tmp1,"",0),$C);
 518         &add("esi",64);
 519          &mov("eax",&swtmp(17));
 520         &mov(&DWP(16,$tmp1,"",0),$E);
 521          &cmp("esi","eax");
 522         &mov(&DWP( 4,$tmp1,"",0),$B);
 523          &jl(&label("start"));
 524
 525         &stack_pop(18+9);
 526          &pop("edi");
 527         &pop("ebx");
 528          &pop("ebp");
 529         &pop("esi");
 530          &ret();
 531
 532         # keep a note of shortcut label so it can be used outside
 533         # block.
 534         my $sclabel = &label("shortcut");
 535
 536         &function_end_B($name);
 537         # Putting this here avoids problems with MASM in debugging mode
 538         &sha1_block_host("sha1_block_asm_host_order", $sclabel);
 539         }
 540