crypto/chacha/asm/chacha-x86.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9 #
  10 # ====================================================================
  11 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
  12 # project. The module is, however, dual licensed under OpenSSL and
  13 # CRYPTOGAMS licenses depending on where you obtain it. For further
  14 # details see http://www.openssl.org/~appro/cryptogams/.
  15 # ====================================================================
  16 #
  17 # January 2015
  18 #
  19 # ChaCha20 for x86.
  20 #
  21 # Performance in cycles per byte out of large buffer.
  22 #
  23 #               1xIALU/gcc      4xSSSE3
  24 # Pentium       17.5/+80%
  25 # PIII          14.2/+60%
  26 # P4            18.6/+84%
  27 # Core2         9.56/+89%       4.83
  28 # Westmere      9.50/+45%       3.35
  29 # Sandy Bridge  10.5/+47%       3.20
  30 # Haswell       8.15/+50%       2.83
  31 # Skylake       7.53/+22%       2.75
  32 # Silvermont    17.4/+36%       8.35
  33 # Goldmont      13.4/+40%       4.36
  34 # Sledgehammer  10.2/+54%
  35 # Bulldozer     13.4/+50%       4.38(*)
  36 #
  37 # (*)   Bulldozer actually executes 4xXOP code path that delivers 3.55;
  38
  39 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  40 push(@INC,"${dir}","${dir}../../perlasm");
  41 require "x86asm.pl";
  42
  43 $output = pop and open STDOUT,">$output";
  44
  45 &asm_init($ARGV[0],$ARGV[$#ARGV] eq "386");
  46
  47 $xmm=$ymm=0;
  48 for (@ARGV) { $xmm=1 if (/-DOPENSSL_IA32_SSE2/); }
  49
  50 $ymm=1 if ($xmm &&
  51                 `$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
  52                         =~ /GNU assembler version ([2-9]\.[0-9]+)/ &&
  53                 ($gasver=$1)>=2.19);    # first version supporting AVX
  54
  55 $ymm=1 if ($xmm && !$ymm && $ARGV[0] eq "win32n" &&
  56                 `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/ &&
  57                 $1>=2.03);      # first version supporting AVX
  58
  59 $ymm=1 if ($xmm && !$ymm && $ARGV[0] eq "win32" &&
  60                 `ml 2>&1` =~ /Version ([0-9]+)\./ &&
  61                 $1>=10);        # first version supporting AVX
  62
  63 $ymm=1 if ($xmm && !$ymm &&
  64                 `$ENV{CC} -v 2>&1` =~ /((?:^clang|LLVM) version|based on LLVM) ([3-9]\.[0-9]+)/ &&
  65                 $2>=3.0);       # first version supporting AVX
  66
  67 $a="eax";
  68 ($b,$b_)=("ebx","ebp");
  69 ($c,$c_)=("ecx","esi");
  70 ($d,$d_)=("edx","edi");
  71
  72 sub QUARTERROUND {
  73 my ($ai,$bi,$ci,$di,$i)=@_;
  74 my ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+1)&3),($ai,$bi,$ci,$di)); # next
  75 my ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-1)&3),($ai,$bi,$ci,$di)); # previous
  76
  77         #       a   b   c   d
  78         #
  79         #       0   4   8  12 < even round
  80         #       1   5   9  13
  81         #       2   6  10  14
  82         #       3   7  11  15
  83         #       0   5  10  15 < odd round
  84         #       1   6  11  12
  85         #       2   7   8  13
  86         #       3   4   9  14
  87
  88         if ($i==0) {
  89             my $j=4;
  90             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-$j--)&3),($ap,$bp,$cp,$dp));
  91         } elsif ($i==3) {
  92             my $j=0;
  93             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+$j++)&3),($an,$bn,$cn,$dn));
  94         } elsif ($i==4) {
  95             my $j=4;
  96             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_+$j--)&3),($ap,$bp,$cp,$dp));
  97         } elsif ($i==7) {
  98             my $j=0;
  99             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_-$j++)&3),($an,$bn,$cn,$dn));
 100         }
 101
 102         #&add   ($a,$b);                        # see elsewhere
 103         &xor    ($d,$a);
 104          &mov   (&DWP(4*$cp,"esp"),$c_)         if ($ai>0 && $ai<3);
 105         &rol    ($d,16);
 106          &mov   (&DWP(4*$bp,"esp"),$b_)         if ($i!=0);
 107         &add    ($c,$d);
 108          &mov   ($c_,&DWP(4*$cn,"esp"))         if ($ai>0 && $ai<3);
 109         &xor    ($b,$c);
 110          &mov   ($d_,&DWP(4*$dn,"esp"))         if ($di!=$dn);
 111         &rol    ($b,12);
 112          &mov   ($b_,&DWP(4*$bn,"esp"))         if ($i<7);
 113          &mov   ($b_,&DWP(128,"esp"))           if ($i==7);     # loop counter
 114         &add    ($a,$b);
 115         &xor    ($d,$a);
 116         &mov    (&DWP(4*$ai,"esp"),$a);
 117         &rol    ($d,8);
 118         &mov    ($a,&DWP(4*$an,"esp"));
 119         &add    ($c,$d);
 120         &mov    (&DWP(4*$di,"esp"),$d)          if ($di!=$dn);
 121         &mov    ($d_,$d)                        if ($di==$dn);
 122         &xor    ($b,$c);
 123          &add   ($a,$b_)                        if ($i<7);      # elsewhere
 124         &rol    ($b,7);
 125
 126         ($b,$b_)=($b_,$b);
 127         ($c,$c_)=($c_,$c);
 128         ($d,$d_)=($d_,$d);
 129 }
 130
 131 &static_label("ssse3_shortcut");
 132 &static_label("xop_shortcut");
 133 &static_label("ssse3_data");
 134 &static_label("pic_point");
 135
 136 &function_begin("ChaCha20_ctr32");
 137         &xor    ("eax","eax");
 138         &cmp    ("eax",&wparam(2));             # len==0?
 139         &je     (&label("no_data"));
 140 if ($xmm) {
 141         &call   (&label("pic_point"));
 142 &set_label("pic_point");
 143         &blindpop("eax");
 144         &picmeup("ebp","OPENSSL_ia32cap_P","eax",&label("pic_point"));
 145         &test   (&DWP(0,"ebp"),1<<24);          # test FXSR bit
 146         &jz     (&label("x86"));
 147         &test   (&DWP(4,"ebp"),1<<9);           # test SSSE3 bit
 148         &jz     (&label("x86"));
 149         &jmp    (&label("ssse3_shortcut"));
 150 &set_label("x86");
 151 }
 152         &mov    ("esi",&wparam(3));             # key
 153         &mov    ("edi",&wparam(4));             # counter and nonce
 154
 155         &stack_push(33);
 156
 157         &mov    ("eax",&DWP(4*0,"esi"));        # copy key
 158         &mov    ("ebx",&DWP(4*1,"esi"));
 159         &mov    ("ecx",&DWP(4*2,"esi"));
 160         &mov    ("edx",&DWP(4*3,"esi"));
 161         &mov    (&DWP(64+4*4,"esp"),"eax");
 162         &mov    (&DWP(64+4*5,"esp"),"ebx");
 163         &mov    (&DWP(64+4*6,"esp"),"ecx");
 164         &mov    (&DWP(64+4*7,"esp"),"edx");
 165         &mov    ("eax",&DWP(4*4,"esi"));
 166         &mov    ("ebx",&DWP(4*5,"esi"));
 167         &mov    ("ecx",&DWP(4*6,"esi"));
 168         &mov    ("edx",&DWP(4*7,"esi"));
 169         &mov    (&DWP(64+4*8,"esp"),"eax");
 170         &mov    (&DWP(64+4*9,"esp"),"ebx");
 171         &mov    (&DWP(64+4*10,"esp"),"ecx");
 172         &mov    (&DWP(64+4*11,"esp"),"edx");
 173         &mov    ("eax",&DWP(4*0,"edi"));        # copy counter and nonce
 174         &mov    ("ebx",&DWP(4*1,"edi"));
 175         &mov    ("ecx",&DWP(4*2,"edi"));
 176         &mov    ("edx",&DWP(4*3,"edi"));
 177         &sub    ("eax",1);
 178         &mov    (&DWP(64+4*12,"esp"),"eax");
 179         &mov    (&DWP(64+4*13,"esp"),"ebx");
 180         &mov    (&DWP(64+4*14,"esp"),"ecx");
 181         &mov    (&DWP(64+4*15,"esp"),"edx");
 182         &jmp    (&label("entry"));
 183
 184 &set_label("outer_loop",16);
 185         &mov    (&wparam(1),$b);                # save input
 186         &mov    (&wparam(0),$a);                # save output
 187         &mov    (&wparam(2),$c);                # save len
 188 &set_label("entry");
 189         &mov    ($a,0x61707865);
 190         &mov    (&DWP(4*1,"esp"),0x3320646e);
 191         &mov    (&DWP(4*2,"esp"),0x79622d32);
 192         &mov    (&DWP(4*3,"esp"),0x6b206574);
 193
 194         &mov    ($b, &DWP(64+4*5,"esp"));       # copy key material
 195         &mov    ($b_,&DWP(64+4*6,"esp"));
 196         &mov    ($c, &DWP(64+4*10,"esp"));
 197         &mov    ($c_,&DWP(64+4*11,"esp"));
 198         &mov    ($d, &DWP(64+4*13,"esp"));
 199         &mov    ($d_,&DWP(64+4*14,"esp"));
 200         &mov    (&DWP(4*5,"esp"),$b);
 201         &mov    (&DWP(4*6,"esp"),$b_);
 202         &mov    (&DWP(4*10,"esp"),$c);
 203         &mov    (&DWP(4*11,"esp"),$c_);
 204         &mov    (&DWP(4*13,"esp"),$d);
 205         &mov    (&DWP(4*14,"esp"),$d_);
 206
 207         &mov    ($b, &DWP(64+4*7,"esp"));
 208         &mov    ($d_,&DWP(64+4*15,"esp"));
 209         &mov    ($d, &DWP(64+4*12,"esp"));
 210         &mov    ($b_,&DWP(64+4*4,"esp"));
 211         &mov    ($c, &DWP(64+4*8,"esp"));
 212         &mov    ($c_,&DWP(64+4*9,"esp"));
 213         &add    ($d,1);                         # counter value
 214         &mov    (&DWP(4*7,"esp"),$b);
 215         &mov    (&DWP(4*15,"esp"),$d_);
 216         &mov    (&DWP(64+4*12,"esp"),$d);       # save counter value
 217
 218         &mov    ($b,10);                        # loop counter
 219         &jmp    (&label("loop"));
 220
 221 &set_label("loop",16);
 222         &add    ($a,$b_);                       # elsewhere
 223         &mov    (&DWP(128,"esp"),$b);           # save loop counter
 224         &mov    ($b,$b_);
 225         &QUARTERROUND(0, 4, 8, 12, 0);
 226         &QUARTERROUND(1, 5, 9, 13, 1);
 227         &QUARTERROUND(2, 6,10, 14, 2);
 228         &QUARTERROUND(3, 7,11, 15, 3);
 229         &QUARTERROUND(0, 5,10, 15, 4);
 230         &QUARTERROUND(1, 6,11, 12, 5);
 231         &QUARTERROUND(2, 7, 8, 13, 6);
 232         &QUARTERROUND(3, 4, 9, 14, 7);
 233         &dec    ($b);
 234         &jnz    (&label("loop"));
 235
 236         &mov    ($b,&wparam(2));                # load len
 237
 238         &add    ($a,0x61707865);                # accumulate key material
 239         &add    ($b_,&DWP(64+4*4,"esp"));
 240         &add    ($c, &DWP(64+4*8,"esp"));
 241         &add    ($c_,&DWP(64+4*9,"esp"));
 242
 243         &cmp    ($b,64);
 244         &jb     (&label("tail"));
 245
 246         &mov    ($b,&wparam(1));                # load input pointer
 247         &add    ($d, &DWP(64+4*12,"esp"));
 248         &add    ($d_,&DWP(64+4*14,"esp"));
 249
 250         &xor    ($a, &DWP(4*0,$b));             # xor with input
 251         &xor    ($b_,&DWP(4*4,$b));
 252         &mov    (&DWP(4*0,"esp"),$a);
 253         &mov    ($a,&wparam(0));                # load output pointer
 254         &xor    ($c, &DWP(4*8,$b));
 255         &xor    ($c_,&DWP(4*9,$b));
 256         &xor    ($d, &DWP(4*12,$b));
 257         &xor    ($d_,&DWP(4*14,$b));
 258         &mov    (&DWP(4*4,$a),$b_);             # write output
 259         &mov    (&DWP(4*8,$a),$c);
 260         &mov    (&DWP(4*9,$a),$c_);
 261         &mov    (&DWP(4*12,$a),$d);
 262         &mov    (&DWP(4*14,$a),$d_);
 263
 264         &mov    ($b_,&DWP(4*1,"esp"));
 265         &mov    ($c, &DWP(4*2,"esp"));
 266         &mov    ($c_,&DWP(4*3,"esp"));
 267         &mov    ($d, &DWP(4*5,"esp"));
 268         &mov    ($d_,&DWP(4*6,"esp"));
 269         &add    ($b_,0x3320646e);               # accumulate key material
 270         &add    ($c, 0x79622d32);
 271         &add    ($c_,0x6b206574);
 272         &add    ($d, &DWP(64+4*5,"esp"));
 273         &add    ($d_,&DWP(64+4*6,"esp"));
 274         &xor    ($b_,&DWP(4*1,$b));
 275         &xor    ($c, &DWP(4*2,$b));
 276         &xor    ($c_,&DWP(4*3,$b));
 277         &xor    ($d, &DWP(4*5,$b));
 278         &xor    ($d_,&DWP(4*6,$b));
 279         &mov    (&DWP(4*1,$a),$b_);
 280         &mov    (&DWP(4*2,$a),$c);
 281         &mov    (&DWP(4*3,$a),$c_);
 282         &mov    (&DWP(4*5,$a),$d);
 283         &mov    (&DWP(4*6,$a),$d_);
 284
 285         &mov    ($b_,&DWP(4*7,"esp"));
 286         &mov    ($c, &DWP(4*10,"esp"));
 287         &mov    ($c_,&DWP(4*11,"esp"));
 288         &mov    ($d, &DWP(4*13,"esp"));
 289         &mov    ($d_,&DWP(4*15,"esp"));
 290         &add    ($b_,&DWP(64+4*7,"esp"));
 291         &add    ($c, &DWP(64+4*10,"esp"));
 292         &add    ($c_,&DWP(64+4*11,"esp"));
 293         &add    ($d, &DWP(64+4*13,"esp"));
 294         &add    ($d_,&DWP(64+4*15,"esp"));
 295         &xor    ($b_,&DWP(4*7,$b));
 296         &xor    ($c, &DWP(4*10,$b));
 297         &xor    ($c_,&DWP(4*11,$b));
 298         &xor    ($d, &DWP(4*13,$b));
 299         &xor    ($d_,&DWP(4*15,$b));
 300         &lea    ($b,&DWP(4*16,$b));
 301         &mov    (&DWP(4*7,$a),$b_);
 302         &mov    ($b_,&DWP(4*0,"esp"));
 303         &mov    (&DWP(4*10,$a),$c);
 304         &mov    ($c,&wparam(2));                # len
 305         &mov    (&DWP(4*11,$a),$c_);
 306         &mov    (&DWP(4*13,$a),$d);
 307         &mov    (&DWP(4*15,$a),$d_);
 308         &mov    (&DWP(4*0,$a),$b_);
 309         &lea    ($a,&DWP(4*16,$a));
 310         &sub    ($c,64);
 311         &jnz    (&label("outer_loop"));
 312
 313         &jmp    (&label("done"));
 314
 315 &set_label("tail");
 316         &add    ($d, &DWP(64+4*12,"esp"));
 317         &add    ($d_,&DWP(64+4*14,"esp"));
 318         &mov    (&DWP(4*0,"esp"),$a);
 319         &mov    (&DWP(4*4,"esp"),$b_);
 320         &mov    (&DWP(4*8,"esp"),$c);
 321         &mov    (&DWP(4*9,"esp"),$c_);
 322         &mov    (&DWP(4*12,"esp"),$d);
 323         &mov    (&DWP(4*14,"esp"),$d_);
 324
 325         &mov    ($b_,&DWP(4*1,"esp"));
 326         &mov    ($c, &DWP(4*2,"esp"));
 327         &mov    ($c_,&DWP(4*3,"esp"));
 328         &mov    ($d, &DWP(4*5,"esp"));
 329         &mov    ($d_,&DWP(4*6,"esp"));
 330         &add    ($b_,0x3320646e);               # accumulate key material
 331         &add    ($c, 0x79622d32);
 332         &add    ($c_,0x6b206574);
 333         &add    ($d, &DWP(64+4*5,"esp"));
 334         &add    ($d_,&DWP(64+4*6,"esp"));
 335         &mov    (&DWP(4*1,"esp"),$b_);
 336         &mov    (&DWP(4*2,"esp"),$c);
 337         &mov    (&DWP(4*3,"esp"),$c_);
 338         &mov    (&DWP(4*5,"esp"),$d);
 339         &mov    (&DWP(4*6,"esp"),$d_);
 340
 341         &mov    ($b_,&DWP(4*7,"esp"));
 342         &mov    ($c, &DWP(4*10,"esp"));
 343         &mov    ($c_,&DWP(4*11,"esp"));
 344         &mov    ($d, &DWP(4*13,"esp"));
 345         &mov    ($d_,&DWP(4*15,"esp"));
 346         &add    ($b_,&DWP(64+4*7,"esp"));
 347         &add    ($c, &DWP(64+4*10,"esp"));
 348         &add    ($c_,&DWP(64+4*11,"esp"));
 349         &add    ($d, &DWP(64+4*13,"esp"));
 350         &add    ($d_,&DWP(64+4*15,"esp"));
 351         &mov    (&DWP(4*7,"esp"),$b_);
 352         &mov    ($b_,&wparam(1));               # load input
 353         &mov    (&DWP(4*10,"esp"),$c);
 354         &mov    ($c,&wparam(0));                # load output
 355         &mov    (&DWP(4*11,"esp"),$c_);
 356         &xor    ($c_,$c_);
 357         &mov    (&DWP(4*13,"esp"),$d);
 358         &mov    (&DWP(4*15,"esp"),$d_);
 359
 360         &xor    ("eax","eax");
 361         &xor    ("edx","edx");
 362 &set_label("tail_loop");
 363         &movb   ("al",&BP(0,$c_,$b_));
 364         &movb   ("dl",&BP(0,"esp",$c_));
 365         &lea    ($c_,&DWP(1,$c_));
 366         &xor    ("al","dl");
 367         &mov    (&BP(-1,$c,$c_),"al");
 368         &dec    ($b);
 369         &jnz    (&label("tail_loop"));
 370
 371 &set_label("done");
 372         &stack_pop(33);
 373 &set_label("no_data");
 374 &function_end("ChaCha20_ctr32");
 375
 376 if ($xmm) {
 377 my ($xa,$xa_,$xb,$xb_,$xc,$xc_,$xd,$xd_)=map("xmm$_",(0..7));
 378 my ($out,$inp,$len)=("edi","esi","ecx");
 379
 380 sub QUARTERROUND_SSSE3 {
 381 my ($ai,$bi,$ci,$di,$i)=@_;
 382 my ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+1)&3),($ai,$bi,$ci,$di)); # next
 383 my ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-1)&3),($ai,$bi,$ci,$di)); # previous
 384
 385         #       a   b   c   d
 386         #
 387         #       0   4   8  12 < even round
 388         #       1   5   9  13
 389         #       2   6  10  14
 390         #       3   7  11  15
 391         #       0   5  10  15 < odd round
 392         #       1   6  11  12
 393         #       2   7   8  13
 394         #       3   4   9  14
 395
 396         if ($i==0) {
 397             my $j=4;
 398             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-$j--)&3),($ap,$bp,$cp,$dp));
 399         } elsif ($i==3) {
 400             my $j=0;
 401             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+$j++)&3),($an,$bn,$cn,$dn));
 402         } elsif ($i==4) {
 403             my $j=4;
 404             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_+$j--)&3),($ap,$bp,$cp,$dp));
 405         } elsif ($i==7) {
 406             my $j=0;
 407             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_-$j++)&3),($an,$bn,$cn,$dn));
 408         }
 409
 410         #&paddd ($xa,$xb);                      # see elsewhere
 411         #&pxor  ($xd,$xa);                      # see elsewhere
 412          &movdqa(&QWP(16*$cp-128,"ebx"),$xc_)   if ($ai>0 && $ai<3);
 413         &pshufb ($xd,&QWP(0,"eax"));            # rot16
 414          &movdqa(&QWP(16*$bp-128,"ebx"),$xb_)   if ($i!=0);
 415         &paddd  ($xc,$xd);
 416          &movdqa($xc_,&QWP(16*$cn-128,"ebx"))   if ($ai>0 && $ai<3);
 417         &pxor   ($xb,$xc);
 418          &movdqa($xb_,&QWP(16*$bn-128,"ebx"))   if ($i<7);
 419         &movdqa ($xa_,$xb);                     # borrow as temporary
 420         &pslld  ($xb,12);
 421         &psrld  ($xa_,20);
 422         &por    ($xb,$xa_);
 423          &movdqa($xa_,&QWP(16*$an-128,"ebx"));
 424         &paddd  ($xa,$xb);
 425          &movdqa($xd_,&QWP(16*$dn-128,"ebx"))   if ($di!=$dn);
 426         &pxor   ($xd,$xa);
 427         &movdqa (&QWP(16*$ai-128,"ebx"),$xa);
 428         &pshufb ($xd,&QWP(16,"eax"));           # rot8
 429         &paddd  ($xc,$xd);
 430         &movdqa (&QWP(16*$di-128,"ebx"),$xd)    if ($di!=$dn);
 431         &movdqa ($xd_,$xd)                      if ($di==$dn);
 432         &pxor   ($xb,$xc);
 433          &paddd ($xa_,$xb_)                     if ($i<7);      # elsewhere
 434         &movdqa ($xa,$xb);                      # borrow as temporary
 435         &pslld  ($xb,7);
 436         &psrld  ($xa,25);
 437          &pxor  ($xd_,$xa_)                     if ($i<7);      # elsewhere
 438         &por    ($xb,$xa);
 439
 440         ($xa,$xa_)=($xa_,$xa);
 441         ($xb,$xb_)=($xb_,$xb);
 442         ($xc,$xc_)=($xc_,$xc);
 443         ($xd,$xd_)=($xd_,$xd);
 444 }
 445
 446 &function_begin("ChaCha20_ssse3");
 447 &set_label("ssse3_shortcut");
 448 if ($ymm) {
 449         &test           (&DWP(4,"ebp"),1<<11);          # test XOP bit
 450         &jnz            (&label("xop_shortcut"));
 451 }
 452
 453         &mov            ($out,&wparam(0));
 454         &mov            ($inp,&wparam(1));
 455         &mov            ($len,&wparam(2));
 456         &mov            ("edx",&wparam(3));             # key
 457         &mov            ("ebx",&wparam(4));             # counter and nonce
 458
 459         &mov            ("ebp","esp");
 460         &stack_push     (131);
 461         &and            ("esp",-64);
 462         &mov            (&DWP(512,"esp"),"ebp");
 463
 464         &lea            ("eax",&DWP(&label("ssse3_data")."-".
 465                                     &label("pic_point"),"eax"));
 466         &movdqu         ("xmm3",&QWP(0,"ebx"));         # counter and nonce
 467
 468 if (defined($gasver) && $gasver>=2.17) {                # even though we encode
 469                                                         # pshufb manually, we
 470                                                         # handle only register
 471                                                         # operands, while this
 472                                                         # segment uses memory
 473                                                         # operand...
 474         &cmp            ($len,64*4);
 475         &jb             (&label("1x"));
 476
 477         &mov            (&DWP(512+4,"esp"),"edx");      # offload pointers
 478         &mov            (&DWP(512+8,"esp"),"ebx");
 479         &sub            ($len,64*4);                    # bias len
 480         &lea            ("ebp",&DWP(256+128,"esp"));    # size optimization
 481
 482         &movdqu         ("xmm7",&QWP(0,"edx"));         # key
 483         &pshufd         ("xmm0","xmm3",0x00);
 484         &pshufd         ("xmm1","xmm3",0x55);
 485         &pshufd         ("xmm2","xmm3",0xaa);
 486         &pshufd         ("xmm3","xmm3",0xff);
 487          &paddd         ("xmm0",&QWP(16*3,"eax"));      # fix counters
 488         &pshufd         ("xmm4","xmm7",0x00);
 489         &pshufd         ("xmm5","xmm7",0x55);
 490          &psubd         ("xmm0",&QWP(16*4,"eax"));
 491         &pshufd         ("xmm6","xmm7",0xaa);
 492         &pshufd         ("xmm7","xmm7",0xff);
 493         &movdqa         (&QWP(16*12-128,"ebp"),"xmm0");
 494         &movdqa         (&QWP(16*13-128,"ebp"),"xmm1");
 495         &movdqa         (&QWP(16*14-128,"ebp"),"xmm2");
 496         &movdqa         (&QWP(16*15-128,"ebp"),"xmm3");
 497          &movdqu        ("xmm3",&QWP(16,"edx"));        # key
 498         &movdqa         (&QWP(16*4-128,"ebp"),"xmm4");
 499         &movdqa         (&QWP(16*5-128,"ebp"),"xmm5");
 500         &movdqa         (&QWP(16*6-128,"ebp"),"xmm6");
 501         &movdqa         (&QWP(16*7-128,"ebp"),"xmm7");
 502          &movdqa        ("xmm7",&QWP(16*2,"eax"));      # sigma
 503          &lea           ("ebx",&DWP(128,"esp"));        # size optimization
 504
 505         &pshufd         ("xmm0","xmm3",0x00);
 506         &pshufd         ("xmm1","xmm3",0x55);
 507         &pshufd         ("xmm2","xmm3",0xaa);
 508         &pshufd         ("xmm3","xmm3",0xff);
 509         &pshufd         ("xmm4","xmm7",0x00);
 510         &pshufd         ("xmm5","xmm7",0x55);
 511         &pshufd         ("xmm6","xmm7",0xaa);
 512         &pshufd         ("xmm7","xmm7",0xff);
 513         &movdqa         (&QWP(16*8-128,"ebp"),"xmm0");
 514         &movdqa         (&QWP(16*9-128,"ebp"),"xmm1");
 515         &movdqa         (&QWP(16*10-128,"ebp"),"xmm2");
 516         &movdqa         (&QWP(16*11-128,"ebp"),"xmm3");
 517         &movdqa         (&QWP(16*0-128,"ebp"),"xmm4");
 518         &movdqa         (&QWP(16*1-128,"ebp"),"xmm5");
 519         &movdqa         (&QWP(16*2-128,"ebp"),"xmm6");
 520         &movdqa         (&QWP(16*3-128,"ebp"),"xmm7");
 521
 522         &lea            ($inp,&DWP(128,$inp));          # size optimization
 523         &lea            ($out,&DWP(128,$out));          # size optimization
 524         &jmp            (&label("outer_loop"));
 525
 526 &set_label("outer_loop",16);
 527         #&movdqa        ("xmm0",&QWP(16*0-128,"ebp"));  # copy key material
 528         &movdqa         ("xmm1",&QWP(16*1-128,"ebp"));
 529         &movdqa         ("xmm2",&QWP(16*2-128,"ebp"));
 530         &movdqa         ("xmm3",&QWP(16*3-128,"ebp"));
 531         #&movdqa        ("xmm4",&QWP(16*4-128,"ebp"));
 532         &movdqa         ("xmm5",&QWP(16*5-128,"ebp"));
 533         &movdqa         ("xmm6",&QWP(16*6-128,"ebp"));
 534         &movdqa         ("xmm7",&QWP(16*7-128,"ebp"));
 535         #&movdqa        (&QWP(16*0-128,"ebx"),"xmm0");
 536         &movdqa         (&QWP(16*1-128,"ebx"),"xmm1");
 537         &movdqa         (&QWP(16*2-128,"ebx"),"xmm2");
 538         &movdqa         (&QWP(16*3-128,"ebx"),"xmm3");
 539         #&movdqa        (&QWP(16*4-128,"ebx"),"xmm4");
 540         &movdqa         (&QWP(16*5-128,"ebx"),"xmm5");
 541         &movdqa         (&QWP(16*6-128,"ebx"),"xmm6");
 542         &movdqa         (&QWP(16*7-128,"ebx"),"xmm7");
 543         #&movdqa        ("xmm0",&QWP(16*8-128,"ebp"));
 544         #&movdqa        ("xmm1",&QWP(16*9-128,"ebp"));
 545         &movdqa         ("xmm2",&QWP(16*10-128,"ebp"));
 546         &movdqa         ("xmm3",&QWP(16*11-128,"ebp"));
 547         &movdqa         ("xmm4",&QWP(16*12-128,"ebp"));
 548         &movdqa         ("xmm5",&QWP(16*13-128,"ebp"));
 549         &movdqa         ("xmm6",&QWP(16*14-128,"ebp"));
 550         &movdqa         ("xmm7",&QWP(16*15-128,"ebp"));
 551         &paddd          ("xmm4",&QWP(16*4,"eax"));      # counter value
 552         #&movdqa        (&QWP(16*8-128,"ebx"),"xmm0");
 553         #&movdqa        (&QWP(16*9-128,"ebx"),"xmm1");
 554         &movdqa         (&QWP(16*10-128,"ebx"),"xmm2");
 555         &movdqa         (&QWP(16*11-128,"ebx"),"xmm3");
 556         &movdqa         (&QWP(16*12-128,"ebx"),"xmm4");
 557         &movdqa         (&QWP(16*13-128,"ebx"),"xmm5");
 558         &movdqa         (&QWP(16*14-128,"ebx"),"xmm6");
 559         &movdqa         (&QWP(16*15-128,"ebx"),"xmm7");
 560         &movdqa         (&QWP(16*12-128,"ebp"),"xmm4"); # save counter value
 561
 562         &movdqa         ($xa, &QWP(16*0-128,"ebp"));
 563         &movdqa         ($xd, "xmm4");
 564         &movdqa         ($xb_,&QWP(16*4-128,"ebp"));
 565         &movdqa         ($xc, &QWP(16*8-128,"ebp"));
 566         &movdqa         ($xc_,&QWP(16*9-128,"ebp"));
 567
 568         &mov            ("edx",10);                     # loop counter
 569         &nop            ();
 570
 571 &set_label("loop",16);
 572         &paddd          ($xa,$xb_);                     # elsewhere
 573         &movdqa         ($xb,$xb_);
 574         &pxor           ($xd,$xa);                      # elsewhere
 575         &QUARTERROUND_SSSE3(0, 4, 8, 12, 0);
 576         &QUARTERROUND_SSSE3(1, 5, 9, 13, 1);
 577         &QUARTERROUND_SSSE3(2, 6,10, 14, 2);
 578         &QUARTERROUND_SSSE3(3, 7,11, 15, 3);
 579         &QUARTERROUND_SSSE3(0, 5,10, 15, 4);
 580         &QUARTERROUND_SSSE3(1, 6,11, 12, 5);
 581         &QUARTERROUND_SSSE3(2, 7, 8, 13, 6);
 582         &QUARTERROUND_SSSE3(3, 4, 9, 14, 7);
 583         &dec            ("edx");
 584         &jnz            (&label("loop"));
 585
 586         &movdqa         (&QWP(16*4-128,"ebx"),$xb_);
 587         &movdqa         (&QWP(16*8-128,"ebx"),$xc);
 588         &movdqa         (&QWP(16*9-128,"ebx"),$xc_);
 589         &movdqa         (&QWP(16*12-128,"ebx"),$xd);
 590         &movdqa         (&QWP(16*14-128,"ebx"),$xd_);
 591
 592     my ($xa0,$xa1,$xa2,$xa3,$xt0,$xt1,$xt2,$xt3)=map("xmm$_",(0..7));
 593
 594         #&movdqa        ($xa0,&QWP(16*0-128,"ebx"));    # it's there
 595         &movdqa         ($xa1,&QWP(16*1-128,"ebx"));
 596         &movdqa         ($xa2,&QWP(16*2-128,"ebx"));
 597         &movdqa         ($xa3,&QWP(16*3-128,"ebx"));
 598
 599     for($i=0;$i<256;$i+=64) {
 600         &paddd          ($xa0,&QWP($i+16*0-128,"ebp")); # accumulate key material
 601         &paddd          ($xa1,&QWP($i+16*1-128,"ebp"));
 602         &paddd          ($xa2,&QWP($i+16*2-128,"ebp"));
 603         &paddd          ($xa3,&QWP($i+16*3-128,"ebp"));
 604
 605         &movdqa         ($xt2,$xa0);            # "de-interlace" data
 606         &punpckldq      ($xa0,$xa1);
 607         &movdqa         ($xt3,$xa2);
 608         &punpckldq      ($xa2,$xa3);
 609         &punpckhdq      ($xt2,$xa1);
 610         &punpckhdq      ($xt3,$xa3);
 611         &movdqa         ($xa1,$xa0);
 612         &punpcklqdq     ($xa0,$xa2);            # "a0"
 613         &movdqa         ($xa3,$xt2);
 614         &punpcklqdq     ($xt2,$xt3);            # "a2"
 615         &punpckhqdq     ($xa1,$xa2);            # "a1"
 616         &punpckhqdq     ($xa3,$xt3);            # "a3"
 617
 618         #($xa2,$xt2)=($xt2,$xa2);
 619
 620         &movdqu         ($xt0,&QWP(64*0-128,$inp));     # load input
 621         &movdqu         ($xt1,&QWP(64*1-128,$inp));
 622         &movdqu         ($xa2,&QWP(64*2-128,$inp));
 623         &movdqu         ($xt3,&QWP(64*3-128,$inp));
 624         &lea            ($inp,&QWP($i<192?16:(64*4-16*3),$inp));
 625         &pxor           ($xt0,$xa0);
 626         &movdqa         ($xa0,&QWP($i+16*4-128,"ebx"))  if ($i<192);
 627         &pxor           ($xt1,$xa1);
 628         &movdqa         ($xa1,&QWP($i+16*5-128,"ebx"))  if ($i<192);
 629         &pxor           ($xt2,$xa2);
 630         &movdqa         ($xa2,&QWP($i+16*6-128,"ebx"))  if ($i<192);
 631         &pxor           ($xt3,$xa3);
 632         &movdqa         ($xa3,&QWP($i+16*7-128,"ebx"))  if ($i<192);
 633         &movdqu         (&QWP(64*0-128,$out),$xt0);     # store output
 634         &movdqu         (&QWP(64*1-128,$out),$xt1);
 635         &movdqu         (&QWP(64*2-128,$out),$xt2);
 636         &movdqu         (&QWP(64*3-128,$out),$xt3);
 637         &lea            ($out,&QWP($i<192?16:(64*4-16*3),$out));
 638     }
 639         &sub            ($len,64*4);
 640         &jnc            (&label("outer_loop"));
 641
 642         &add            ($len,64*4);
 643         &jz             (&label("done"));
 644
 645         &mov            ("ebx",&DWP(512+8,"esp"));      # restore pointers
 646         &lea            ($inp,&DWP(-128,$inp));
 647         &mov            ("edx",&DWP(512+4,"esp"));
 648         &lea            ($out,&DWP(-128,$out));
 649
 650         &movd           ("xmm2",&DWP(16*12-128,"ebp")); # counter value
 651         &movdqu         ("xmm3",&QWP(0,"ebx"));
 652         &paddd          ("xmm2",&QWP(16*6,"eax"));      # +four
 653         &pand           ("xmm3",&QWP(16*7,"eax"));
 654         &por            ("xmm3","xmm2");                # counter value
 655 }
 656 {
 657 my ($a,$b,$c,$d,$t,$t1,$rot16,$rot24)=map("xmm$_",(0..7));
 658
 659 sub SSSE3ROUND {        # critical path is 20 "SIMD ticks" per round
 660         &paddd          ($a,$b);
 661         &pxor           ($d,$a);
 662         &pshufb         ($d,$rot16);
 663
 664         &paddd          ($c,$d);
 665         &pxor           ($b,$c);
 666         &movdqa         ($t,$b);
 667         &psrld          ($b,20);
 668         &pslld          ($t,12);
 669         &por            ($b,$t);
 670
 671         &paddd          ($a,$b);
 672         &pxor           ($d,$a);
 673         &pshufb         ($d,$rot24);
 674
 675         &paddd          ($c,$d);
 676         &pxor           ($b,$c);
 677         &movdqa         ($t,$b);
 678         &psrld          ($b,25);
 679         &pslld          ($t,7);
 680         &por            ($b,$t);
 681 }
 682
 683 &set_label("1x");
 684         &movdqa         ($a,&QWP(16*2,"eax"));          # sigma
 685         &movdqu         ($b,&QWP(0,"edx"));
 686         &movdqu         ($c,&QWP(16,"edx"));
 687         #&movdqu        ($d,&QWP(0,"ebx"));             # already loaded
 688         &movdqa         ($rot16,&QWP(0,"eax"));
 689         &movdqa         ($rot24,&QWP(16,"eax"));
 690         &mov            (&DWP(16*3,"esp"),"ebp");
 691
 692         &movdqa         (&QWP(16*0,"esp"),$a);
 693         &movdqa         (&QWP(16*1,"esp"),$b);
 694         &movdqa         (&QWP(16*2,"esp"),$c);
 695         &movdqa         (&QWP(16*3,"esp"),$d);
 696         &mov            ("edx",10);
 697         &jmp            (&label("loop1x"));
 698
 699 &set_label("outer1x",16);
 700         &movdqa         ($d,&QWP(16*5,"eax"));          # one
 701         &movdqa         ($a,&QWP(16*0,"esp"));
 702         &movdqa         ($b,&QWP(16*1,"esp"));
 703         &movdqa         ($c,&QWP(16*2,"esp"));
 704         &paddd          ($d,&QWP(16*3,"esp"));
 705         &mov            ("edx",10);
 706         &movdqa         (&QWP(16*3,"esp"),$d);
 707         &jmp            (&label("loop1x"));
 708
 709 &set_label("loop1x",16);
 710         &SSSE3ROUND();
 711         &pshufd ($c,$c,0b01001110);
 712         &pshufd ($b,$b,0b00111001);
 713         &pshufd ($d,$d,0b10010011);
 714         &nop    ();
 715
 716         &SSSE3ROUND();
 717         &pshufd ($c,$c,0b01001110);
 718         &pshufd ($b,$b,0b10010011);
 719         &pshufd ($d,$d,0b00111001);
 720
 721         &dec            ("edx");
 722         &jnz            (&label("loop1x"));
 723
 724         &paddd          ($a,&QWP(16*0,"esp"));
 725         &paddd          ($b,&QWP(16*1,"esp"));
 726         &paddd          ($c,&QWP(16*2,"esp"));
 727         &paddd          ($d,&QWP(16*3,"esp"));
 728
 729         &cmp            ($len,64);
 730         &jb             (&label("tail"));
 731
 732         &movdqu         ($t,&QWP(16*0,$inp));
 733         &movdqu         ($t1,&QWP(16*1,$inp));
 734         &pxor           ($a,$t);                # xor with input
 735         &movdqu         ($t,&QWP(16*2,$inp));
 736         &pxor           ($b,$t1);
 737         &movdqu         ($t1,&QWP(16*3,$inp));
 738         &pxor           ($c,$t);
 739         &pxor           ($d,$t1);
 740         &lea            ($inp,&DWP(16*4,$inp)); # inp+=64
 741
 742         &movdqu         (&QWP(16*0,$out),$a);   # write output
 743         &movdqu         (&QWP(16*1,$out),$b);
 744         &movdqu         (&QWP(16*2,$out),$c);
 745         &movdqu         (&QWP(16*3,$out),$d);
 746         &lea            ($out,&DWP(16*4,$out)); # inp+=64
 747
 748         &sub            ($len,64);
 749         &jnz            (&label("outer1x"));
 750
 751         &jmp            (&label("done"));
 752
 753 &set_label("tail");
 754         &movdqa         (&QWP(16*0,"esp"),$a);
 755         &movdqa         (&QWP(16*1,"esp"),$b);
 756         &movdqa         (&QWP(16*2,"esp"),$c);
 757         &movdqa         (&QWP(16*3,"esp"),$d);
 758
 759         &xor            ("eax","eax");
 760         &xor            ("edx","edx");
 761         &xor            ("ebp","ebp");
 762
 763 &set_label("tail_loop");
 764         &movb           ("al",&BP(0,"esp","ebp"));
 765         &movb           ("dl",&BP(0,$inp,"ebp"));
 766         &lea            ("ebp",&DWP(1,"ebp"));
 767         &xor            ("al","dl");
 768         &movb           (&BP(-1,$out,"ebp"),"al");
 769         &dec            ($len);
 770         &jnz            (&label("tail_loop"));
 771 }
 772 &set_label("done");
 773         &mov            ("esp",&DWP(512,"esp"));
 774 &function_end("ChaCha20_ssse3");
 775
 776 &align  (64);
 777 &set_label("ssse3_data");
 778 &data_byte(0x2,0x3,0x0,0x1, 0x6,0x7,0x4,0x5, 0xa,0xb,0x8,0x9, 0xe,0xf,0xc,0xd);
 779 &data_byte(0x3,0x0,0x1,0x2, 0x7,0x4,0x5,0x6, 0xb,0x8,0x9,0xa, 0xf,0xc,0xd,0xe);
 780 &data_word(0x61707865,0x3320646e,0x79622d32,0x6b206574);
 781 &data_word(0,1,2,3);
 782 &data_word(4,4,4,4);
 783 &data_word(1,0,0,0);
 784 &data_word(4,0,0,0);
 785 &data_word(0,-1,-1,-1);
 786 &align  (64);
 787 }
 788 &asciz  ("ChaCha20 for x86, CRYPTOGAMS by <appro\@openssl.org>");
 789
 790 if ($ymm) {
 791 my ($xa,$xa_,$xb,$xb_,$xc,$xc_,$xd,$xd_)=map("xmm$_",(0..7));
 792 my ($out,$inp,$len)=("edi","esi","ecx");
 793
 794 sub QUARTERROUND_XOP {
 795 my ($ai,$bi,$ci,$di,$i)=@_;
 796 my ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+1)&3),($ai,$bi,$ci,$di)); # next
 797 my ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-1)&3),($ai,$bi,$ci,$di)); # previous
 798
 799         #       a   b   c   d
 800         #
 801         #       0   4   8  12 < even round
 802         #       1   5   9  13
 803         #       2   6  10  14
 804         #       3   7  11  15
 805         #       0   5  10  15 < odd round
 806         #       1   6  11  12
 807         #       2   7   8  13
 808         #       3   4   9  14
 809
 810         if ($i==0) {
 811             my $j=4;
 812             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-$j--)&3),($ap,$bp,$cp,$dp));
 813         } elsif ($i==3) {
 814             my $j=0;
 815             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_+$j++)&3),($an,$bn,$cn,$dn));
 816         } elsif ($i==4) {
 817             my $j=4;
 818             ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_+$j--)&3),($ap,$bp,$cp,$dp));
 819         } elsif ($i==7) {
 820             my $j=0;
 821             ($an,$bn,$cn,$dn)=map(($_&~3)+(($_-$j++)&3),($an,$bn,$cn,$dn));
 822         }
 823
 824         #&vpaddd        ($xa,$xa,$xb);                  # see elsewhere
 825         #&vpxor         ($xd,$xd,$xa);                  # see elsewhere
 826          &vmovdqa       (&QWP(16*$cp-128,"ebx"),$xc_)   if ($ai>0 && $ai<3);
 827         &vprotd         ($xd,$xd,16);
 828          &vmovdqa       (&QWP(16*$bp-128,"ebx"),$xb_)   if ($i!=0);
 829         &vpaddd         ($xc,$xc,$xd);
 830          &vmovdqa       ($xc_,&QWP(16*$cn-128,"ebx"))   if ($ai>0 && $ai<3);
 831         &vpxor          ($xb,$i!=0?$xb:$xb_,$xc);
 832          &vmovdqa       ($xa_,&QWP(16*$an-128,"ebx"));
 833         &vprotd         ($xb,$xb,12);
 834          &vmovdqa       ($xb_,&QWP(16*$bn-128,"ebx"))   if ($i<7);
 835         &vpaddd         ($xa,$xa,$xb);
 836          &vmovdqa       ($xd_,&QWP(16*$dn-128,"ebx"))   if ($di!=$dn);
 837         &vpxor          ($xd,$xd,$xa);
 838          &vpaddd        ($xa_,$xa_,$xb_)                if ($i<7);      # elsewhere
 839         &vprotd         ($xd,$xd,8);
 840         &vmovdqa        (&QWP(16*$ai-128,"ebx"),$xa);
 841         &vpaddd         ($xc,$xc,$xd);
 842         &vmovdqa        (&QWP(16*$di-128,"ebx"),$xd)    if ($di!=$dn);
 843         &vpxor          ($xb,$xb,$xc);
 844          &vpxor         ($xd_,$di==$dn?$xd:$xd_,$xa_)   if ($i<7);      # elsewhere
 845         &vprotd         ($xb,$xb,7);
 846
 847         ($xa,$xa_)=($xa_,$xa);
 848         ($xb,$xb_)=($xb_,$xb);
 849         ($xc,$xc_)=($xc_,$xc);
 850         ($xd,$xd_)=($xd_,$xd);
 851 }
 852
 853 &function_begin("ChaCha20_xop");
 854 &set_label("xop_shortcut");
 855         &mov            ($out,&wparam(0));
 856         &mov            ($inp,&wparam(1));
 857         &mov            ($len,&wparam(2));
 858         &mov            ("edx",&wparam(3));             # key
 859         &mov            ("ebx",&wparam(4));             # counter and nonce
 860         &vzeroupper     ();
 861
 862         &mov            ("ebp","esp");
 863         &stack_push     (131);
 864         &and            ("esp",-64);
 865         &mov            (&DWP(512,"esp"),"ebp");
 866
 867         &lea            ("eax",&DWP(&label("ssse3_data")."-".
 868                                     &label("pic_point"),"eax"));
 869         &vmovdqu        ("xmm3",&QWP(0,"ebx"));         # counter and nonce
 870
 871         &cmp            ($len,64*4);
 872         &jb             (&label("1x"));
 873
 874         &mov            (&DWP(512+4,"esp"),"edx");      # offload pointers
 875         &mov            (&DWP(512+8,"esp"),"ebx");
 876         &sub            ($len,64*4);                    # bias len
 877         &lea            ("ebp",&DWP(256+128,"esp"));    # size optimization
 878
 879         &vmovdqu        ("xmm7",&QWP(0,"edx"));         # key
 880         &vpshufd        ("xmm0","xmm3",0x00);
 881         &vpshufd        ("xmm1","xmm3",0x55);
 882         &vpshufd        ("xmm2","xmm3",0xaa);
 883         &vpshufd        ("xmm3","xmm3",0xff);
 884          &vpaddd        ("xmm0","xmm0",&QWP(16*3,"eax"));       # fix counters
 885         &vpshufd        ("xmm4","xmm7",0x00);
 886         &vpshufd        ("xmm5","xmm7",0x55);
 887          &vpsubd        ("xmm0","xmm0",&QWP(16*4,"eax"));
 888         &vpshufd        ("xmm6","xmm7",0xaa);
 889         &vpshufd        ("xmm7","xmm7",0xff);
 890         &vmovdqa        (&QWP(16*12-128,"ebp"),"xmm0");
 891         &vmovdqa        (&QWP(16*13-128,"ebp"),"xmm1");
 892         &vmovdqa        (&QWP(16*14-128,"ebp"),"xmm2");
 893         &vmovdqa        (&QWP(16*15-128,"ebp"),"xmm3");
 894          &vmovdqu       ("xmm3",&QWP(16,"edx"));        # key
 895         &vmovdqa        (&QWP(16*4-128,"ebp"),"xmm4");
 896         &vmovdqa        (&QWP(16*5-128,"ebp"),"xmm5");
 897         &vmovdqa        (&QWP(16*6-128,"ebp"),"xmm6");
 898         &vmovdqa        (&QWP(16*7-128,"ebp"),"xmm7");
 899          &vmovdqa       ("xmm7",&QWP(16*2,"eax"));      # sigma
 900          &lea           ("ebx",&DWP(128,"esp"));        # size optimization
 901
 902         &vpshufd        ("xmm0","xmm3",0x00);
 903         &vpshufd        ("xmm1","xmm3",0x55);
 904         &vpshufd        ("xmm2","xmm3",0xaa);
 905         &vpshufd        ("xmm3","xmm3",0xff);
 906         &vpshufd        ("xmm4","xmm7",0x00);
 907         &vpshufd        ("xmm5","xmm7",0x55);
 908         &vpshufd        ("xmm6","xmm7",0xaa);
 909         &vpshufd        ("xmm7","xmm7",0xff);
 910         &vmovdqa        (&QWP(16*8-128,"ebp"),"xmm0");
 911         &vmovdqa        (&QWP(16*9-128,"ebp"),"xmm1");
 912         &vmovdqa        (&QWP(16*10-128,"ebp"),"xmm2");
 913         &vmovdqa        (&QWP(16*11-128,"ebp"),"xmm3");
 914         &vmovdqa        (&QWP(16*0-128,"ebp"),"xmm4");
 915         &vmovdqa        (&QWP(16*1-128,"ebp"),"xmm5");
 916         &vmovdqa        (&QWP(16*2-128,"ebp"),"xmm6");
 917         &vmovdqa        (&QWP(16*3-128,"ebp"),"xmm7");
 918
 919         &lea            ($inp,&DWP(128,$inp));          # size optimization
 920         &lea            ($out,&DWP(128,$out));          # size optimization
 921         &jmp            (&label("outer_loop"));
 922
 923 &set_label("outer_loop",32);
 924         #&vmovdqa       ("xmm0",&QWP(16*0-128,"ebp"));  # copy key material
 925         &vmovdqa        ("xmm1",&QWP(16*1-128,"ebp"));
 926         &vmovdqa        ("xmm2",&QWP(16*2-128,"ebp"));
 927         &vmovdqa        ("xmm3",&QWP(16*3-128,"ebp"));
 928         #&vmovdqa       ("xmm4",&QWP(16*4-128,"ebp"));
 929         &vmovdqa        ("xmm5",&QWP(16*5-128,"ebp"));
 930         &vmovdqa        ("xmm6",&QWP(16*6-128,"ebp"));
 931         &vmovdqa        ("xmm7",&QWP(16*7-128,"ebp"));
 932         #&vmovdqa       (&QWP(16*0-128,"ebx"),"xmm0");
 933         &vmovdqa        (&QWP(16*1-128,"ebx"),"xmm1");
 934         &vmovdqa        (&QWP(16*2-128,"ebx"),"xmm2");
 935         &vmovdqa        (&QWP(16*3-128,"ebx"),"xmm3");
 936         #&vmovdqa       (&QWP(16*4-128,"ebx"),"xmm4");
 937         &vmovdqa        (&QWP(16*5-128,"ebx"),"xmm5");
 938         &vmovdqa        (&QWP(16*6-128,"ebx"),"xmm6");
 939         &vmovdqa        (&QWP(16*7-128,"ebx"),"xmm7");
 940         #&vmovdqa       ("xmm0",&QWP(16*8-128,"ebp"));
 941         #&vmovdqa       ("xmm1",&QWP(16*9-128,"ebp"));
 942         &vmovdqa        ("xmm2",&QWP(16*10-128,"ebp"));
 943         &vmovdqa        ("xmm3",&QWP(16*11-128,"ebp"));
 944         &vmovdqa        ("xmm4",&QWP(16*12-128,"ebp"));
 945         &vmovdqa        ("xmm5",&QWP(16*13-128,"ebp"));
 946         &vmovdqa        ("xmm6",&QWP(16*14-128,"ebp"));
 947         &vmovdqa        ("xmm7",&QWP(16*15-128,"ebp"));
 948         &vpaddd         ("xmm4","xmm4",&QWP(16*4,"eax"));       # counter value
 949         #&vmovdqa       (&QWP(16*8-128,"ebx"),"xmm0");
 950         #&vmovdqa       (&QWP(16*9-128,"ebx"),"xmm1");
 951         &vmovdqa        (&QWP(16*10-128,"ebx"),"xmm2");
 952         &vmovdqa        (&QWP(16*11-128,"ebx"),"xmm3");
 953         &vmovdqa        (&QWP(16*12-128,"ebx"),"xmm4");
 954         &vmovdqa        (&QWP(16*13-128,"ebx"),"xmm5");
 955         &vmovdqa        (&QWP(16*14-128,"ebx"),"xmm6");
 956         &vmovdqa        (&QWP(16*15-128,"ebx"),"xmm7");
 957         &vmovdqa        (&QWP(16*12-128,"ebp"),"xmm4"); # save counter value
 958
 959         &vmovdqa        ($xa, &QWP(16*0-128,"ebp"));
 960         &vmovdqa        ($xd, "xmm4");
 961         &vmovdqa        ($xb_,&QWP(16*4-128,"ebp"));
 962         &vmovdqa        ($xc, &QWP(16*8-128,"ebp"));
 963         &vmovdqa        ($xc_,&QWP(16*9-128,"ebp"));
 964
 965         &mov            ("edx",10);                     # loop counter
 966         &nop            ();
 967
 968 &set_label("loop",32);
 969         &vpaddd         ($xa,$xa,$xb_);                 # elsewhere
 970         &vpxor          ($xd,$xd,$xa);                  # elsewhere
 971         &QUARTERROUND_XOP(0, 4, 8, 12, 0);
 972         &QUARTERROUND_XOP(1, 5, 9, 13, 1);
 973         &QUARTERROUND_XOP(2, 6,10, 14, 2);
 974         &QUARTERROUND_XOP(3, 7,11, 15, 3);
 975         &QUARTERROUND_XOP(0, 5,10, 15, 4);
 976         &QUARTERROUND_XOP(1, 6,11, 12, 5);
 977         &QUARTERROUND_XOP(2, 7, 8, 13, 6);
 978         &QUARTERROUND_XOP(3, 4, 9, 14, 7);
 979         &dec            ("edx");
 980         &jnz            (&label("loop"));
 981
 982         &vmovdqa        (&QWP(16*4-128,"ebx"),$xb_);
 983         &vmovdqa        (&QWP(16*8-128,"ebx"),$xc);
 984         &vmovdqa        (&QWP(16*9-128,"ebx"),$xc_);
 985         &vmovdqa        (&QWP(16*12-128,"ebx"),$xd);
 986         &vmovdqa        (&QWP(16*14-128,"ebx"),$xd_);
 987
 988     my ($xa0,$xa1,$xa2,$xa3,$xt0,$xt1,$xt2,$xt3)=map("xmm$_",(0..7));
 989
 990         #&vmovdqa       ($xa0,&QWP(16*0-128,"ebx"));    # it's there
 991         &vmovdqa        ($xa1,&QWP(16*1-128,"ebx"));
 992         &vmovdqa        ($xa2,&QWP(16*2-128,"ebx"));
 993         &vmovdqa        ($xa3,&QWP(16*3-128,"ebx"));
 994
 995     for($i=0;$i<256;$i+=64) {
 996         &vpaddd         ($xa0,$xa0,&QWP($i+16*0-128,"ebp"));    # accumulate key material
 997         &vpaddd         ($xa1,$xa1,&QWP($i+16*1-128,"ebp"));
 998         &vpaddd         ($xa2,$xa2,&QWP($i+16*2-128,"ebp"));
 999         &vpaddd         ($xa3,$xa3,&QWP($i+16*3-128,"ebp"));
1000
1001         &vpunpckldq     ($xt2,$xa0,$xa1);       # "de-interlace" data
1002         &vpunpckldq     ($xt3,$xa2,$xa3);
1003         &vpunpckhdq     ($xa0,$xa0,$xa1);
1004         &vpunpckhdq     ($xa2,$xa2,$xa3);
1005         &vpunpcklqdq    ($xa1,$xt2,$xt3);       # "a0"
1006         &vpunpckhqdq    ($xt2,$xt2,$xt3);       # "a1"
1007         &vpunpcklqdq    ($xt3,$xa0,$xa2);       # "a2"
1008         &vpunpckhqdq    ($xa3,$xa0,$xa2);       # "a3"
1009
1010         &vpxor          ($xt0,$xa1,&QWP(64*0-128,$inp));
1011         &vpxor          ($xt1,$xt2,&QWP(64*1-128,$inp));
1012         &vpxor          ($xt2,$xt3,&QWP(64*2-128,$inp));
1013         &vpxor          ($xt3,$xa3,&QWP(64*3-128,$inp));
1014         &lea            ($inp,&QWP($i<192?16:(64*4-16*3),$inp));
1015         &vmovdqa        ($xa0,&QWP($i+16*4-128,"ebx"))  if ($i<192);
1016         &vmovdqa        ($xa1,&QWP($i+16*5-128,"ebx"))  if ($i<192);
1017         &vmovdqa        ($xa2,&QWP($i+16*6-128,"ebx"))  if ($i<192);
1018         &vmovdqa        ($xa3,&QWP($i+16*7-128,"ebx"))  if ($i<192);
1019         &vmovdqu        (&QWP(64*0-128,$out),$xt0);     # store output
1020         &vmovdqu        (&QWP(64*1-128,$out),$xt1);
1021         &vmovdqu        (&QWP(64*2-128,$out),$xt2);
1022         &vmovdqu        (&QWP(64*3-128,$out),$xt3);
1023         &lea            ($out,&QWP($i<192?16:(64*4-16*3),$out));
1024     }
1025         &sub            ($len,64*4);
1026         &jnc            (&label("outer_loop"));
1027
1028         &add            ($len,64*4);
1029         &jz             (&label("done"));
1030
1031         &mov            ("ebx",&DWP(512+8,"esp"));      # restore pointers
1032         &lea            ($inp,&DWP(-128,$inp));
1033         &mov            ("edx",&DWP(512+4,"esp"));
1034         &lea            ($out,&DWP(-128,$out));
1035
1036         &vmovd          ("xmm2",&DWP(16*12-128,"ebp")); # counter value
1037         &vmovdqu        ("xmm3",&QWP(0,"ebx"));
1038         &vpaddd         ("xmm2","xmm2",&QWP(16*6,"eax"));# +four
1039         &vpand          ("xmm3","xmm3",&QWP(16*7,"eax"));
1040         &vpor           ("xmm3","xmm3","xmm2");         # counter value
1041 {
1042 my ($a,$b,$c,$d,$t,$t1,$rot16,$rot24)=map("xmm$_",(0..7));
1043
1044 sub XOPROUND {
1045         &vpaddd         ($a,$a,$b);
1046         &vpxor          ($d,$d,$a);
1047         &vprotd         ($d,$d,16);
1048
1049         &vpaddd         ($c,$c,$d);
1050         &vpxor          ($b,$b,$c);
1051         &vprotd         ($b,$b,12);
1052
1053         &vpaddd         ($a,$a,$b);
1054         &vpxor          ($d,$d,$a);
1055         &vprotd         ($d,$d,8);
1056
1057         &vpaddd         ($c,$c,$d);
1058         &vpxor          ($b,$b,$c);
1059         &vprotd         ($b,$b,7);
1060 }
1061
1062 &set_label("1x");
1063         &vmovdqa        ($a,&QWP(16*2,"eax"));          # sigma
1064         &vmovdqu        ($b,&QWP(0,"edx"));
1065         &vmovdqu        ($c,&QWP(16,"edx"));
1066         #&vmovdqu       ($d,&QWP(0,"ebx"));             # already loaded
1067         &vmovdqa        ($rot16,&QWP(0,"eax"));
1068         &vmovdqa        ($rot24,&QWP(16,"eax"));
1069         &mov            (&DWP(16*3,"esp"),"ebp");
1070
1071         &vmovdqa        (&QWP(16*0,"esp"),$a);
1072         &vmovdqa        (&QWP(16*1,"esp"),$b);
1073         &vmovdqa        (&QWP(16*2,"esp"),$c);
1074         &vmovdqa        (&QWP(16*3,"esp"),$d);
1075         &mov            ("edx",10);
1076         &jmp            (&label("loop1x"));
1077
1078 &set_label("outer1x",16);
1079         &vmovdqa        ($d,&QWP(16*5,"eax"));          # one
1080         &vmovdqa        ($a,&QWP(16*0,"esp"));
1081         &vmovdqa        ($b,&QWP(16*1,"esp"));
1082         &vmovdqa        ($c,&QWP(16*2,"esp"));
1083         &vpaddd         ($d,$d,&QWP(16*3,"esp"));
1084         &mov            ("edx",10);
1085         &vmovdqa        (&QWP(16*3,"esp"),$d);
1086         &jmp            (&label("loop1x"));
1087
1088 &set_label("loop1x",16);
1089         &XOPROUND();
1090         &vpshufd        ($c,$c,0b01001110);
1091         &vpshufd        ($b,$b,0b00111001);
1092         &vpshufd        ($d,$d,0b10010011);
1093
1094         &XOPROUND();
1095         &vpshufd        ($c,$c,0b01001110);
1096         &vpshufd        ($b,$b,0b10010011);
1097         &vpshufd        ($d,$d,0b00111001);
1098
1099         &dec            ("edx");
1100         &jnz            (&label("loop1x"));
1101
1102         &vpaddd         ($a,$a,&QWP(16*0,"esp"));
1103         &vpaddd         ($b,$b,&QWP(16*1,"esp"));
1104         &vpaddd         ($c,$c,&QWP(16*2,"esp"));
1105         &vpaddd         ($d,$d,&QWP(16*3,"esp"));
1106
1107         &cmp            ($len,64);
1108         &jb             (&label("tail"));
1109
1110         &vpxor          ($a,$a,&QWP(16*0,$inp));        # xor with input
1111         &vpxor          ($b,$b,&QWP(16*1,$inp));
1112         &vpxor          ($c,$c,&QWP(16*2,$inp));
1113         &vpxor          ($d,$d,&QWP(16*3,$inp));
1114         &lea            ($inp,&DWP(16*4,$inp));         # inp+=64
1115
1116         &vmovdqu        (&QWP(16*0,$out),$a);           # write output
1117         &vmovdqu        (&QWP(16*1,$out),$b);
1118         &vmovdqu        (&QWP(16*2,$out),$c);
1119         &vmovdqu        (&QWP(16*3,$out),$d);
1120         &lea            ($out,&DWP(16*4,$out));         # inp+=64
1121
1122         &sub            ($len,64);
1123         &jnz            (&label("outer1x"));
1124
1125         &jmp            (&label("done"));
1126
1127 &set_label("tail");
1128         &vmovdqa        (&QWP(16*0,"esp"),$a);
1129         &vmovdqa        (&QWP(16*1,"esp"),$b);
1130         &vmovdqa        (&QWP(16*2,"esp"),$c);
1131         &vmovdqa        (&QWP(16*3,"esp"),$d);
1132
1133         &xor            ("eax","eax");
1134         &xor            ("edx","edx");
1135         &xor            ("ebp","ebp");
1136
1137 &set_label("tail_loop");
1138         &movb           ("al",&BP(0,"esp","ebp"));
1139         &movb           ("dl",&BP(0,$inp,"ebp"));
1140         &lea            ("ebp",&DWP(1,"ebp"));
1141         &xor            ("al","dl");
1142         &movb           (&BP(-1,$out,"ebp"),"al");
1143         &dec            ($len);
1144         &jnz            (&label("tail_loop"));
1145 }
1146 &set_label("done");
1147         &vzeroupper     ();
1148         &mov            ("esp",&DWP(512,"esp"));
1149 &function_end("ChaCha20_xop");
1150 }
1151
1152 &asm_finish();
1153
1154 close STDOUT;