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