crypto/modes/asm/ghash-x86_64.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2010-2020 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 # March, June 2010
  18 #
  19 # The module implements "4-bit" GCM GHASH function and underlying
  20 # single multiplication operation in GF(2^128). "4-bit" means that
  21 # it uses 256 bytes per-key table [+128 bytes shared table]. GHASH
  22 # function features so called "528B" variant utilizing additional
  23 # 256+16 bytes of per-key storage [+512 bytes shared table].
  24 # Performance results are for this streamed GHASH subroutine and are
  25 # expressed in cycles per processed byte, less is better:
  26 #
  27 #               gcc 3.4.x(*)    assembler
  28 #
  29 # P4            28.6            14.0            +100%
  30 # Opteron       19.3            7.7             +150%
  31 # Core2         17.8            8.1(**)         +120%
  32 # Atom          31.6            16.8            +88%
  33 # VIA Nano      21.8            10.1            +115%
  34 #
  35 # (*)   comparison is not completely fair, because C results are
  36 #       for vanilla "256B" implementation, while assembler results
  37 #       are for "528B";-)
  38 # (**)  it's mystery [to me] why Core2 result is not same as for
  39 #       Opteron;
  40
  41 # May 2010
  42 #
  43 # Add PCLMULQDQ version performing at 2.02 cycles per processed byte.
  44 # See ghash-x86.pl for background information and details about coding
  45 # techniques.
  46 #
  47 # Special thanks to David Woodhouse for providing access to a
  48 # Westmere-based system on behalf of Intel Open Source Technology Centre.
  49
  50 # December 2012
  51 #
  52 # Overhaul: aggregate Karatsuba post-processing, improve ILP in
  53 # reduction_alg9, increase reduction aggregate factor to 4x. As for
  54 # the latter. ghash-x86.pl discusses that it makes lesser sense to
  55 # increase aggregate factor. Then why increase here? Critical path
  56 # consists of 3 independent pclmulqdq instructions, Karatsuba post-
  57 # processing and reduction. "On top" of this we lay down aggregated
  58 # multiplication operations, triplets of independent pclmulqdq's. As
  59 # issue rate for pclmulqdq is limited, it makes lesser sense to
  60 # aggregate more multiplications than it takes to perform remaining
  61 # non-multiplication operations. 2x is near-optimal coefficient for
  62 # contemporary Intel CPUs (therefore modest improvement coefficient),
  63 # but not for Bulldozer. Latter is because logical SIMD operations
  64 # are twice as slow in comparison to Intel, so that critical path is
  65 # longer. A CPU with higher pclmulqdq issue rate would also benefit
  66 # from higher aggregate factor...
  67 #
  68 # Westmere      1.78(+13%)
  69 # Sandy Bridge  1.80(+8%)
  70 # Ivy Bridge    1.80(+7%)
  71 # Haswell       0.55(+93%) (if system doesn't support AVX)
  72 # Broadwell     0.45(+110%)(if system doesn't support AVX)
  73 # Skylake       0.44(+110%)(if system doesn't support AVX)
  74 # Bulldozer     1.49(+27%)
  75 # Silvermont    2.88(+13%)
  76 # Knights L     2.12(-)    (if system doesn't support AVX)
  77 # Goldmont      1.08(+24%)
  78
  79 # March 2013
  80 #
  81 # ... 8x aggregate factor AVX code path is using reduction algorithm
  82 # suggested by Shay Gueron[1]. Even though contemporary AVX-capable
  83 # CPUs such as Sandy and Ivy Bridge can execute it, the code performs
  84 # sub-optimally in comparison to above mentioned version. But thanks
  85 # to Ilya Albrekht and Max Locktyukhin of Intel Corp. we knew that
  86 # it performs in 0.41 cycles per byte on Haswell processor, in
  87 # 0.29 on Broadwell, and in 0.36 on Skylake.
  88 #
  89 # Knights Landing achieves 1.09 cpb.
  90 #
  91 # [1] http://rt.openssl.org/Ticket/Display.html?id=2900&user=guest&pass=guest
  92
  93 # $output is the last argument if it looks like a file (it has an extension)
  94 # $flavour is the first argument if it doesn't look like a file
  95 $output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
  96 $flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
  97
  98 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  99
 100 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
 101 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
 102 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
 103 die "can't locate x86_64-xlate.pl";
 104
 105 if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
 106                 =~ /GNU assembler version ([2-9]\.[0-9]+)/) {
 107         $avx = ($1>=2.20) + ($1>=2.22);
 108 }
 109
 110 if (!$avx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
 111             `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
 112         $avx = ($1>=2.09) + ($1>=2.10);
 113 }
 114
 115 if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
 116             `ml64 2>&1` =~ /Version ([0-9]+)\./) {
 117         $avx = ($1>=10) + ($1>=11);
 118 }
 119
 120 if (!$avx && `$ENV{CC} -v 2>&1` =~ /((?:^clang|LLVM) version|.*based on LLVM) ([0-9]+\.[0-9]+)/) {
 121         $avx = ($2>=3.0) + ($2>3.0);
 122 }
 123
 124 open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\""
 125     or die "can't call $xlate: $!";
 126 *STDOUT=*OUT;
 127
 128 $do4xaggr=1;
 129
 130 # common register layout
 131 $nlo="%rax";
 132 $nhi="%rbx";
 133 $Zlo="%r8";
 134 $Zhi="%r9";
 135 $tmp="%r10";
 136 $rem_4bit = "%r11";
 137
 138 $Xi="%rdi";
 139 $Htbl="%rsi";
 140
 141 # per-function register layout
 142 $cnt="%rcx";
 143 $rem="%rdx";
 144
 145 sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/     or
 146                         $r =~ s/%[er]([sd]i)/%\1l/      or
 147                         $r =~ s/%[er](bp)/%\1l/         or
 148                         $r =~ s/%(r[0-9]+)[d]?/%\1b/;   $r; }
 149
 150 sub AUTOLOAD()          # thunk [simplified] 32-bit style perlasm
 151 { my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
 152   my $arg = pop;
 153     $arg = "\$$arg" if ($arg*1 eq $arg);
 154     $code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
 155 }
 156 \f
 157 { my $N;
 158   sub loop() {
 159   my $inp = shift;
 160
 161         $N++;
 162 $code.=<<___;
 163         xor     $nlo,$nlo
 164         xor     $nhi,$nhi
 165         mov     `&LB("$Zlo")`,`&LB("$nlo")`
 166         mov     `&LB("$Zlo")`,`&LB("$nhi")`
 167         shl     \$4,`&LB("$nlo")`
 168         mov     \$14,$cnt
 169         mov     8($Htbl,$nlo),$Zlo
 170         mov     ($Htbl,$nlo),$Zhi
 171         and     \$0xf0,`&LB("$nhi")`
 172         mov     $Zlo,$rem
 173         jmp     .Loop$N
 174
 175 .align  16
 176 .Loop$N:
 177         shr     \$4,$Zlo
 178         and     \$0xf,$rem
 179         mov     $Zhi,$tmp
 180         mov     ($inp,$cnt),`&LB("$nlo")`
 181         shr     \$4,$Zhi
 182         xor     8($Htbl,$nhi),$Zlo
 183         shl     \$60,$tmp
 184         xor     ($Htbl,$nhi),$Zhi
 185         mov     `&LB("$nlo")`,`&LB("$nhi")`
 186         xor     ($rem_4bit,$rem,8),$Zhi
 187         mov     $Zlo,$rem
 188         shl     \$4,`&LB("$nlo")`
 189         xor     $tmp,$Zlo
 190         dec     $cnt
 191         js      .Lbreak$N
 192
 193         shr     \$4,$Zlo
 194         and     \$0xf,$rem
 195         mov     $Zhi,$tmp
 196         shr     \$4,$Zhi
 197         xor     8($Htbl,$nlo),$Zlo
 198         shl     \$60,$tmp
 199         xor     ($Htbl,$nlo),$Zhi
 200         and     \$0xf0,`&LB("$nhi")`
 201         xor     ($rem_4bit,$rem,8),$Zhi
 202         mov     $Zlo,$rem
 203         xor     $tmp,$Zlo
 204         jmp     .Loop$N
 205
 206 .align  16
 207 .Lbreak$N:
 208         shr     \$4,$Zlo
 209         and     \$0xf,$rem
 210         mov     $Zhi,$tmp
 211         shr     \$4,$Zhi
 212         xor     8($Htbl,$nlo),$Zlo
 213         shl     \$60,$tmp
 214         xor     ($Htbl,$nlo),$Zhi
 215         and     \$0xf0,`&LB("$nhi")`
 216         xor     ($rem_4bit,$rem,8),$Zhi
 217         mov     $Zlo,$rem
 218         xor     $tmp,$Zlo
 219
 220         shr     \$4,$Zlo
 221         and     \$0xf,$rem
 222         mov     $Zhi,$tmp
 223         shr     \$4,$Zhi
 224         xor     8($Htbl,$nhi),$Zlo
 225         shl     \$60,$tmp
 226         xor     ($Htbl,$nhi),$Zhi
 227         xor     $tmp,$Zlo
 228         xor     ($rem_4bit,$rem,8),$Zhi
 229
 230         bswap   $Zlo
 231         bswap   $Zhi
 232 ___
 233 }}
 234
 235 $code=<<___;
 236 .text
 237 .extern OPENSSL_ia32cap_P
 238
 239 .globl  gcm_gmult_4bit
 240 .type   gcm_gmult_4bit,\@function,2
 241 .align  16
 242 gcm_gmult_4bit:
 243 .cfi_startproc
 244         endbranch
 245         push    %rbx
 246 .cfi_push       %rbx
 247         push    %rbp            # %rbp and others are pushed exclusively in
 248 .cfi_push       %rbp
 249         push    %r12            # order to reuse Win64 exception handler...
 250 .cfi_push       %r12
 251         push    %r13
 252 .cfi_push       %r13
 253         push    %r14
 254 .cfi_push       %r14
 255         push    %r15
 256 .cfi_push       %r15
 257         sub     \$280,%rsp
 258 .cfi_adjust_cfa_offset  280
 259 .Lgmult_prologue:
 260
 261         movzb   15($Xi),$Zlo
 262         lea     .Lrem_4bit(%rip),$rem_4bit
 263 ___
 264         &loop   ($Xi);
 265 $code.=<<___;
 266         mov     $Zlo,8($Xi)
 267         mov     $Zhi,($Xi)
 268
 269         lea     280+48(%rsp),%rsi
 270 .cfi_def_cfa    %rsi,8
 271         mov     -8(%rsi),%rbx
 272 .cfi_restore    %rbx
 273         lea     (%rsi),%rsp
 274 .cfi_def_cfa_register   %rsp
 275 .Lgmult_epilogue:
 276         ret
 277 .cfi_endproc
 278 .size   gcm_gmult_4bit,.-gcm_gmult_4bit
 279 ___
 280 \f
 281 # per-function register layout
 282 $inp="%rdx";
 283 $len="%rcx";
 284 $rem_8bit=$rem_4bit;
 285
 286 $code.=<<___;
 287 .globl  gcm_ghash_4bit
 288 .type   gcm_ghash_4bit,\@function,4
 289 .align  16
 290 gcm_ghash_4bit:
 291 .cfi_startproc
 292         endbranch
 293         push    %rbx
 294 .cfi_push       %rbx
 295         push    %rbp
 296 .cfi_push       %rbp
 297         push    %r12
 298 .cfi_push       %r12
 299         push    %r13
 300 .cfi_push       %r13
 301         push    %r14
 302 .cfi_push       %r14
 303         push    %r15
 304 .cfi_push       %r15
 305         sub     \$280,%rsp
 306 .cfi_adjust_cfa_offset  280
 307 .Lghash_prologue:
 308         mov     $inp,%r14               # reassign couple of args
 309         mov     $len,%r15
 310 ___
 311 { my $inp="%r14";
 312   my $dat="%edx";
 313   my $len="%r15";
 314   my @nhi=("%ebx","%ecx");
 315   my @rem=("%r12","%r13");
 316   my $Hshr4="%rbp";
 317
 318         &sub    ($Htbl,-128);           # size optimization
 319         &lea    ($Hshr4,"16+128(%rsp)");
 320         { my @lo =($nlo,$nhi);
 321           my @hi =($Zlo,$Zhi);
 322
 323           &xor  ($dat,$dat);
 324           for ($i=0,$j=-2;$i<18;$i++,$j++) {
 325             &mov        ("$j(%rsp)",&LB($dat))          if ($i>1);
 326             &or         ($lo[0],$tmp)                   if ($i>1);
 327             &mov        (&LB($dat),&LB($lo[1]))         if ($i>0 && $i<17);
 328             &shr        ($lo[1],4)                      if ($i>0 && $i<17);
 329             &mov        ($tmp,$hi[1])                   if ($i>0 && $i<17);
 330             &shr        ($hi[1],4)                      if ($i>0 && $i<17);
 331             &mov        ("8*$j($Hshr4)",$hi[0])         if ($i>1);
 332             &mov        ($hi[0],"16*$i+0-128($Htbl)")   if ($i<16);
 333             &shl        (&LB($dat),4)                   if ($i>0 && $i<17);
 334             &mov        ("8*$j-128($Hshr4)",$lo[0])     if ($i>1);
 335             &mov        ($lo[0],"16*$i+8-128($Htbl)")   if ($i<16);
 336             &shl        ($tmp,60)                       if ($i>0 && $i<17);
 337
 338             push        (@lo,shift(@lo));
 339             push        (@hi,shift(@hi));
 340           }
 341         }
 342         &add    ($Htbl,-128);
 343         &mov    ($Zlo,"8($Xi)");
 344         &mov    ($Zhi,"0($Xi)");
 345         &add    ($len,$inp);            # pointer to the end of data
 346         &lea    ($rem_8bit,".Lrem_8bit(%rip)");
 347         &jmp    (".Louter_loop");
 348
 349 $code.=".align  16\n.Louter_loop:\n";
 350         &xor    ($Zhi,"($inp)");
 351         &mov    ("%rdx","8($inp)");
 352         &lea    ($inp,"16($inp)");
 353         &xor    ("%rdx",$Zlo);
 354         &mov    ("($Xi)",$Zhi);
 355         &mov    ("8($Xi)","%rdx");
 356         &shr    ("%rdx",32);
 357
 358         &xor    ($nlo,$nlo);
 359         &rol    ($dat,8);
 360         &mov    (&LB($nlo),&LB($dat));
 361         &movz   ($nhi[0],&LB($dat));
 362         &shl    (&LB($nlo),4);
 363         &shr    ($nhi[0],4);
 364
 365         for ($j=11,$i=0;$i<15;$i++) {
 366             &rol        ($dat,8);
 367             &xor        ($Zlo,"8($Htbl,$nlo)")                  if ($i>0);
 368             &xor        ($Zhi,"($Htbl,$nlo)")                   if ($i>0);
 369             &mov        ($Zlo,"8($Htbl,$nlo)")                  if ($i==0);
 370             &mov        ($Zhi,"($Htbl,$nlo)")                   if ($i==0);
 371
 372             &mov        (&LB($nlo),&LB($dat));
 373             &xor        ($Zlo,$tmp)                             if ($i>0);
 374             &movzw      ($rem[1],"($rem_8bit,$rem[1],2)")       if ($i>0);
 375
 376             &movz       ($nhi[1],&LB($dat));
 377             &shl        (&LB($nlo),4);
 378             &movzb      ($rem[0],"(%rsp,$nhi[0])");
 379
 380             &shr        ($nhi[1],4)                             if ($i<14);
 381             &and        ($nhi[1],0xf0)                          if ($i==14);
 382             &shl        ($rem[1],48)                            if ($i>0);
 383             &xor        ($rem[0],$Zlo);
 384
 385             &mov        ($tmp,$Zhi);
 386             &xor        ($Zhi,$rem[1])                          if ($i>0);
 387             &shr        ($Zlo,8);
 388
 389             &movz       ($rem[0],&LB($rem[0]));
 390             &mov        ($dat,"$j($Xi)")                        if (--$j%4==0);
 391             &shr        ($Zhi,8);
 392
 393             &xor        ($Zlo,"-128($Hshr4,$nhi[0],8)");
 394             &shl        ($tmp,56);
 395             &xor        ($Zhi,"($Hshr4,$nhi[0],8)");
 396
 397             unshift     (@nhi,pop(@nhi));               # "rotate" registers
 398             unshift     (@rem,pop(@rem));
 399         }
 400         &movzw  ($rem[1],"($rem_8bit,$rem[1],2)");
 401         &xor    ($Zlo,"8($Htbl,$nlo)");
 402         &xor    ($Zhi,"($Htbl,$nlo)");
 403
 404         &shl    ($rem[1],48);
 405         &xor    ($Zlo,$tmp);
 406
 407         &xor    ($Zhi,$rem[1]);
 408         &movz   ($rem[0],&LB($Zlo));
 409         &shr    ($Zlo,4);
 410
 411         &mov    ($tmp,$Zhi);
 412         &shl    (&LB($rem[0]),4);
 413         &shr    ($Zhi,4);
 414
 415         &xor    ($Zlo,"8($Htbl,$nhi[0])");
 416         &movzw  ($rem[0],"($rem_8bit,$rem[0],2)");
 417         &shl    ($tmp,60);
 418
 419         &xor    ($Zhi,"($Htbl,$nhi[0])");
 420         &xor    ($Zlo,$tmp);
 421         &shl    ($rem[0],48);
 422
 423         &bswap  ($Zlo);
 424         &xor    ($Zhi,$rem[0]);
 425
 426         &bswap  ($Zhi);
 427         &cmp    ($inp,$len);
 428         &jb     (".Louter_loop");
 429 }
 430 $code.=<<___;
 431         mov     $Zlo,8($Xi)
 432         mov     $Zhi,($Xi)
 433
 434         lea     280+48(%rsp),%rsi
 435 .cfi_def_cfa    %rsi,8
 436         mov     -48(%rsi),%r15
 437 .cfi_restore    %r15
 438         mov     -40(%rsi),%r14
 439 .cfi_restore    %r14
 440         mov     -32(%rsi),%r13
 441 .cfi_restore    %r13
 442         mov     -24(%rsi),%r12
 443 .cfi_restore    %r12
 444         mov     -16(%rsi),%rbp
 445 .cfi_restore    %rbp
 446         mov     -8(%rsi),%rbx
 447 .cfi_restore    %rbx
 448         lea     0(%rsi),%rsp
 449 .cfi_def_cfa_register   %rsp
 450 .Lghash_epilogue:
 451         ret
 452 .cfi_endproc
 453 .size   gcm_ghash_4bit,.-gcm_ghash_4bit
 454 ___
 455 \f
 456 ######################################################################
 457 # PCLMULQDQ version.
 458
 459 @_4args=$win64? ("%rcx","%rdx","%r8", "%r9") :  # Win64 order
 460                 ("%rdi","%rsi","%rdx","%rcx");  # Unix order
 461
 462 ($Xi,$Xhi)=("%xmm0","%xmm1");   $Hkey="%xmm2";
 463 ($T1,$T2,$T3)=("%xmm3","%xmm4","%xmm5");
 464
 465 sub clmul64x64_T2 {     # minimal register pressure
 466 my ($Xhi,$Xi,$Hkey,$HK)=@_;
 467
 468 if (!defined($HK)) {    $HK = $T2;
 469 $code.=<<___;
 470         movdqa          $Xi,$Xhi                #
 471         pshufd          \$0b01001110,$Xi,$T1
 472         pshufd          \$0b01001110,$Hkey,$T2
 473         pxor            $Xi,$T1                 #
 474         pxor            $Hkey,$T2
 475 ___
 476 } else {
 477 $code.=<<___;
 478         movdqa          $Xi,$Xhi                #
 479         pshufd          \$0b01001110,$Xi,$T1
 480         pxor            $Xi,$T1                 #
 481 ___
 482 }
 483 $code.=<<___;
 484         pclmulqdq       \$0x00,$Hkey,$Xi        #######
 485         pclmulqdq       \$0x11,$Hkey,$Xhi       #######
 486         pclmulqdq       \$0x00,$HK,$T1          #######
 487         pxor            $Xi,$T1                 #
 488         pxor            $Xhi,$T1                #
 489
 490         movdqa          $T1,$T2                 #
 491         psrldq          \$8,$T1
 492         pslldq          \$8,$T2                 #
 493         pxor            $T1,$Xhi
 494         pxor            $T2,$Xi                 #
 495 ___
 496 }
 497
 498 sub reduction_alg9 {    # 17/11 times faster than Intel version
 499 my ($Xhi,$Xi) = @_;
 500
 501 $code.=<<___;
 502         # 1st phase
 503         movdqa          $Xi,$T2                 #
 504         movdqa          $Xi,$T1
 505         psllq           \$5,$Xi
 506         pxor            $Xi,$T1                 #
 507         psllq           \$1,$Xi
 508         pxor            $T1,$Xi                 #
 509         psllq           \$57,$Xi                #
 510         movdqa          $Xi,$T1                 #
 511         pslldq          \$8,$Xi
 512         psrldq          \$8,$T1                 #
 513         pxor            $T2,$Xi
 514         pxor            $T1,$Xhi                #
 515
 516         # 2nd phase
 517         movdqa          $Xi,$T2
 518         psrlq           \$1,$Xi
 519         pxor            $T2,$Xhi                #
 520         pxor            $Xi,$T2
 521         psrlq           \$5,$Xi
 522         pxor            $T2,$Xi                 #
 523         psrlq           \$1,$Xi                 #
 524         pxor            $Xhi,$Xi                #
 525 ___
 526 }
 527 \f
 528 { my ($Htbl,$Xip)=@_4args;
 529   my $HK="%xmm6";
 530
 531 $code.=<<___;
 532 .globl  gcm_init_clmul
 533 .type   gcm_init_clmul,\@abi-omnipotent
 534 .align  16
 535 gcm_init_clmul:
 536 .cfi_startproc
 537 .L_init_clmul:
 538 ___
 539 $code.=<<___ if ($win64);
 540 .LSEH_begin_gcm_init_clmul:
 541         # I can't trust assembler to use specific encoding:-(
 542         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
 543         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
 544 ___
 545 $code.=<<___;
 546         movdqu          ($Xip),$Hkey
 547         pshufd          \$0b01001110,$Hkey,$Hkey        # dword swap
 548
 549         # <<1 twist
 550         pshufd          \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
 551         movdqa          $Hkey,$T1
 552         psllq           \$1,$Hkey
 553         pxor            $T3,$T3                 #
 554         psrlq           \$63,$T1
 555         pcmpgtd         $T2,$T3                 # broadcast carry bit
 556         pslldq          \$8,$T1
 557         por             $T1,$Hkey               # H<<=1
 558
 559         # magic reduction
 560         pand            .L0x1c2_polynomial(%rip),$T3
 561         pxor            $T3,$Hkey               # if(carry) H^=0x1c2_polynomial
 562
 563         # calculate H^2
 564         pshufd          \$0b01001110,$Hkey,$HK
 565         movdqa          $Hkey,$Xi
 566         pxor            $Hkey,$HK
 567 ___
 568         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);
 569         &reduction_alg9 ($Xhi,$Xi);
 570 $code.=<<___;
 571         pshufd          \$0b01001110,$Hkey,$T1
 572         pshufd          \$0b01001110,$Xi,$T2
 573         pxor            $Hkey,$T1               # Karatsuba pre-processing
 574         movdqu          $Hkey,0x00($Htbl)       # save H
 575         pxor            $Xi,$T2                 # Karatsuba pre-processing
 576         movdqu          $Xi,0x10($Htbl)         # save H^2
 577         palignr         \$8,$T1,$T2             # low part is H.lo^H.hi...
 578         movdqu          $T2,0x20($Htbl)         # save Karatsuba "salt"
 579 ___
 580 if ($do4xaggr) {
 581         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^3
 582         &reduction_alg9 ($Xhi,$Xi);
 583 $code.=<<___;
 584         movdqa          $Xi,$T3
 585 ___
 586         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^4
 587         &reduction_alg9 ($Xhi,$Xi);
 588 $code.=<<___;
 589         pshufd          \$0b01001110,$T3,$T1
 590         pshufd          \$0b01001110,$Xi,$T2
 591         pxor            $T3,$T1                 # Karatsuba pre-processing
 592         movdqu          $T3,0x30($Htbl)         # save H^3
 593         pxor            $Xi,$T2                 # Karatsuba pre-processing
 594         movdqu          $Xi,0x40($Htbl)         # save H^4
 595         palignr         \$8,$T1,$T2             # low part is H^3.lo^H^3.hi...
 596         movdqu          $T2,0x50($Htbl)         # save Karatsuba "salt"
 597 ___
 598 }
 599 $code.=<<___ if ($win64);
 600         movaps  (%rsp),%xmm6
 601         lea     0x18(%rsp),%rsp
 602 .LSEH_end_gcm_init_clmul:
 603 ___
 604 $code.=<<___;
 605         ret
 606 .cfi_endproc
 607 .size   gcm_init_clmul,.-gcm_init_clmul
 608 ___
 609 }
 610
 611 { my ($Xip,$Htbl)=@_4args;
 612
 613 $code.=<<___;
 614 .globl  gcm_gmult_clmul
 615 .type   gcm_gmult_clmul,\@abi-omnipotent
 616 .align  16
 617 gcm_gmult_clmul:
 618 .cfi_startproc
 619         endbranch
 620 .L_gmult_clmul:
 621         movdqu          ($Xip),$Xi
 622         movdqa          .Lbswap_mask(%rip),$T3
 623         movdqu          ($Htbl),$Hkey
 624         movdqu          0x20($Htbl),$T2
 625         pshufb          $T3,$Xi
 626 ___
 627         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$T2);
 628 $code.=<<___ if (0 || (&reduction_alg9($Xhi,$Xi)&&0));
 629         # experimental alternative. special thing about is that there
 630         # no dependency between the two multiplications...
 631         mov             \$`0xE1<<1`,%eax
 632         mov             \$0xA040608020C0E000,%r10       # ((7..0)·0xE0)&0xff
 633         mov             \$0x07,%r11d
 634         movq            %rax,$T1
 635         movq            %r10,$T2
 636         movq            %r11,$T3                # borrow $T3
 637         pand            $Xi,$T3
 638         pshufb          $T3,$T2                 # ($Xi&7)·0xE0
 639         movq            %rax,$T3
 640         pclmulqdq       \$0x00,$Xi,$T1          # ·(0xE1<<1)
 641         pxor            $Xi,$T2
 642         pslldq          \$15,$T2
 643         paddd           $T2,$T2                 # <<(64+56+1)
 644         pxor            $T2,$Xi
 645         pclmulqdq       \$0x01,$T3,$Xi
 646         movdqa          .Lbswap_mask(%rip),$T3  # reload $T3
 647         psrldq          \$1,$T1
 648         pxor            $T1,$Xhi
 649         pslldq          \$7,$Xi
 650         pxor            $Xhi,$Xi
 651 ___
 652 $code.=<<___;
 653         pshufb          $T3,$Xi
 654         movdqu          $Xi,($Xip)
 655         ret
 656 .cfi_endproc
 657 .size   gcm_gmult_clmul,.-gcm_gmult_clmul
 658 ___
 659 }
 660 \f
 661 { my ($Xip,$Htbl,$inp,$len)=@_4args;
 662   my ($Xln,$Xmn,$Xhn,$Hkey2,$HK) = map("%xmm$_",(3..7));
 663   my ($T1,$T2,$T3)=map("%xmm$_",(8..10));
 664
 665 $code.=<<___;
 666 .globl  gcm_ghash_clmul
 667 .type   gcm_ghash_clmul,\@abi-omnipotent
 668 .align  32
 669 gcm_ghash_clmul:
 670 .cfi_startproc
 671         endbranch
 672 .L_ghash_clmul:
 673 ___
 674 $code.=<<___ if ($win64);
 675         lea     -0x88(%rsp),%rax
 676 .LSEH_begin_gcm_ghash_clmul:
 677         # I can't trust assembler to use specific encoding:-(
 678         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
 679         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
 680         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
 681         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
 682         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
 683         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
 684         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
 685         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
 686         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
 687         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
 688         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
 689 ___
 690 $code.=<<___;
 691         movdqa          .Lbswap_mask(%rip),$T3
 692
 693         movdqu          ($Xip),$Xi
 694         movdqu          ($Htbl),$Hkey
 695         movdqu          0x20($Htbl),$HK
 696         pshufb          $T3,$Xi
 697
 698         sub             \$0x10,$len
 699         jz              .Lodd_tail
 700
 701         movdqu          0x10($Htbl),$Hkey2
 702 ___
 703 if ($do4xaggr) {
 704 my ($Xl,$Xm,$Xh,$Hkey3,$Hkey4)=map("%xmm$_",(11..15));
 705
 706 $code.=<<___;
 707         mov             OPENSSL_ia32cap_P+4(%rip),%eax
 708         cmp             \$0x30,$len
 709         jb              .Lskip4x
 710
 711         and             \$`1<<26|1<<22`,%eax    # isolate MOVBE+XSAVE
 712         cmp             \$`1<<22`,%eax          # check for MOVBE without XSAVE
 713         je              .Lskip4x
 714
 715         sub             \$0x30,$len
 716         mov             \$0xA040608020C0E000,%rax       # ((7..0)·0xE0)&0xff
 717         movdqu          0x30($Htbl),$Hkey3
 718         movdqu          0x40($Htbl),$Hkey4
 719
 720         #######
 721         # Xi+4 =[(H*Ii+3) + (H^2*Ii+2) + (H^3*Ii+1) + H^4*(Ii+Xi)] mod P
 722         #
 723         movdqu          0x30($inp),$Xln
 724          movdqu         0x20($inp),$Xl
 725         pshufb          $T3,$Xln
 726          pshufb         $T3,$Xl
 727         movdqa          $Xln,$Xhn
 728         pshufd          \$0b01001110,$Xln,$Xmn
 729         pxor            $Xln,$Xmn
 730         pclmulqdq       \$0x00,$Hkey,$Xln
 731         pclmulqdq       \$0x11,$Hkey,$Xhn
 732         pclmulqdq       \$0x00,$HK,$Xmn
 733
 734         movdqa          $Xl,$Xh
 735         pshufd          \$0b01001110,$Xl,$Xm
 736         pxor            $Xl,$Xm
 737         pclmulqdq       \$0x00,$Hkey2,$Xl
 738         pclmulqdq       \$0x11,$Hkey2,$Xh
 739         pclmulqdq       \$0x10,$HK,$Xm
 740         xorps           $Xl,$Xln
 741         xorps           $Xh,$Xhn
 742         movups          0x50($Htbl),$HK
 743         xorps           $Xm,$Xmn
 744
 745         movdqu          0x10($inp),$Xl
 746          movdqu         0($inp),$T1
 747         pshufb          $T3,$Xl
 748          pshufb         $T3,$T1
 749         movdqa          $Xl,$Xh
 750         pshufd          \$0b01001110,$Xl,$Xm
 751          pxor           $T1,$Xi
 752         pxor            $Xl,$Xm
 753         pclmulqdq       \$0x00,$Hkey3,$Xl
 754          movdqa         $Xi,$Xhi
 755          pshufd         \$0b01001110,$Xi,$T1
 756          pxor           $Xi,$T1
 757         pclmulqdq       \$0x11,$Hkey3,$Xh
 758         pclmulqdq       \$0x00,$HK,$Xm
 759         xorps           $Xl,$Xln
 760         xorps           $Xh,$Xhn
 761
 762         lea     0x40($inp),$inp
 763         sub     \$0x40,$len
 764         jc      .Ltail4x
 765
 766         jmp     .Lmod4_loop
 767 .align  32
 768 .Lmod4_loop:
 769         pclmulqdq       \$0x00,$Hkey4,$Xi
 770         xorps           $Xm,$Xmn
 771          movdqu         0x30($inp),$Xl
 772          pshufb         $T3,$Xl
 773         pclmulqdq       \$0x11,$Hkey4,$Xhi
 774         xorps           $Xln,$Xi
 775          movdqu         0x20($inp),$Xln
 776          movdqa         $Xl,$Xh
 777         pclmulqdq       \$0x10,$HK,$T1
 778          pshufd         \$0b01001110,$Xl,$Xm
 779         xorps           $Xhn,$Xhi
 780          pxor           $Xl,$Xm
 781          pshufb         $T3,$Xln
 782         movups          0x20($Htbl),$HK
 783         xorps           $Xmn,$T1
 784          pclmulqdq      \$0x00,$Hkey,$Xl
 785          pshufd         \$0b01001110,$Xln,$Xmn
 786
 787         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 788          movdqa         $Xln,$Xhn
 789         pxor            $Xhi,$T1                #
 790          pxor           $Xln,$Xmn
 791         movdqa          $T1,$T2                 #
 792          pclmulqdq      \$0x11,$Hkey,$Xh
 793         pslldq          \$8,$T1
 794         psrldq          \$8,$T2                 #
 795         pxor            $T1,$Xi
 796         movdqa          .L7_mask(%rip),$T1
 797         pxor            $T2,$Xhi                #
 798         movq            %rax,$T2
 799
 800         pand            $Xi,$T1                 # 1st phase
 801         pshufb          $T1,$T2                 #
 802         pxor            $Xi,$T2                 #
 803          pclmulqdq      \$0x00,$HK,$Xm
 804         psllq           \$57,$T2                #
 805         movdqa          $T2,$T1                 #
 806         pslldq          \$8,$T2
 807          pclmulqdq      \$0x00,$Hkey2,$Xln
 808         psrldq          \$8,$T1                 #
 809         pxor            $T2,$Xi
 810         pxor            $T1,$Xhi                #
 811         movdqu          0($inp),$T1
 812
 813         movdqa          $Xi,$T2                 # 2nd phase
 814         psrlq           \$1,$Xi
 815          pclmulqdq      \$0x11,$Hkey2,$Xhn
 816          xorps          $Xl,$Xln
 817          movdqu         0x10($inp),$Xl
 818          pshufb         $T3,$Xl
 819          pclmulqdq      \$0x10,$HK,$Xmn
 820          xorps          $Xh,$Xhn
 821          movups         0x50($Htbl),$HK
 822         pshufb          $T3,$T1
 823         pxor            $T2,$Xhi                #
 824         pxor            $Xi,$T2
 825         psrlq           \$5,$Xi
 826
 827          movdqa         $Xl,$Xh
 828          pxor           $Xm,$Xmn
 829          pshufd         \$0b01001110,$Xl,$Xm
 830         pxor            $T2,$Xi                 #
 831         pxor            $T1,$Xhi
 832          pxor           $Xl,$Xm
 833          pclmulqdq      \$0x00,$Hkey3,$Xl
 834         psrlq           \$1,$Xi                 #
 835         pxor            $Xhi,$Xi                #
 836         movdqa          $Xi,$Xhi
 837          pclmulqdq      \$0x11,$Hkey3,$Xh
 838          xorps          $Xl,$Xln
 839         pshufd          \$0b01001110,$Xi,$T1
 840         pxor            $Xi,$T1
 841
 842          pclmulqdq      \$0x00,$HK,$Xm
 843          xorps          $Xh,$Xhn
 844
 845         lea     0x40($inp),$inp
 846         sub     \$0x40,$len
 847         jnc     .Lmod4_loop
 848
 849 .Ltail4x:
 850         pclmulqdq       \$0x00,$Hkey4,$Xi
 851         pclmulqdq       \$0x11,$Hkey4,$Xhi
 852         pclmulqdq       \$0x10,$HK,$T1
 853         xorps           $Xm,$Xmn
 854         xorps           $Xln,$Xi
 855         xorps           $Xhn,$Xhi
 856         pxor            $Xi,$Xhi                # aggregated Karatsuba post-processing
 857         pxor            $Xmn,$T1
 858
 859         pxor            $Xhi,$T1                #
 860         pxor            $Xi,$Xhi
 861
 862         movdqa          $T1,$T2                 #
 863         psrldq          \$8,$T1
 864         pslldq          \$8,$T2                 #
 865         pxor            $T1,$Xhi
 866         pxor            $T2,$Xi                 #
 867 ___
 868         &reduction_alg9($Xhi,$Xi);
 869 $code.=<<___;
 870         add     \$0x40,$len
 871         jz      .Ldone
 872         movdqu  0x20($Htbl),$HK
 873         sub     \$0x10,$len
 874         jz      .Lodd_tail
 875 .Lskip4x:
 876 ___
 877 }
 878 $code.=<<___;
 879         #######
 880         # Xi+2 =[H*(Ii+1 + Xi+1)] mod P =
 881         #       [(H*Ii+1) + (H*Xi+1)] mod P =
 882         #       [(H*Ii+1) + H^2*(Ii+Xi)] mod P
 883         #
 884         movdqu          ($inp),$T1              # Ii
 885         movdqu          16($inp),$Xln           # Ii+1
 886         pshufb          $T3,$T1
 887         pshufb          $T3,$Xln
 888         pxor            $T1,$Xi                 # Ii+Xi
 889
 890         movdqa          $Xln,$Xhn
 891         pshufd          \$0b01001110,$Xln,$Xmn
 892         pxor            $Xln,$Xmn
 893         pclmulqdq       \$0x00,$Hkey,$Xln
 894         pclmulqdq       \$0x11,$Hkey,$Xhn
 895         pclmulqdq       \$0x00,$HK,$Xmn
 896
 897         lea             32($inp),$inp           # i+=2
 898         nop
 899         sub             \$0x20,$len
 900         jbe             .Leven_tail
 901         nop
 902         jmp             .Lmod_loop
 903
 904 .align  32
 905 .Lmod_loop:
 906         movdqa          $Xi,$Xhi
 907         movdqa          $Xmn,$T1
 908         pshufd          \$0b01001110,$Xi,$Xmn   #
 909         pxor            $Xi,$Xmn                #
 910
 911         pclmulqdq       \$0x00,$Hkey2,$Xi
 912         pclmulqdq       \$0x11,$Hkey2,$Xhi
 913         pclmulqdq       \$0x10,$HK,$Xmn
 914
 915         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 916         pxor            $Xhn,$Xhi
 917           movdqu        ($inp),$T2              # Ii
 918         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 919           pshufb        $T3,$T2
 920           movdqu        16($inp),$Xln           # Ii+1
 921
 922         pxor            $Xhi,$T1
 923           pxor          $T2,$Xhi                # "Ii+Xi", consume early
 924         pxor            $T1,$Xmn
 925          pshufb         $T3,$Xln
 926         movdqa          $Xmn,$T1                #
 927         psrldq          \$8,$T1
 928         pslldq          \$8,$Xmn                #
 929         pxor            $T1,$Xhi
 930         pxor            $Xmn,$Xi                #
 931
 932         movdqa          $Xln,$Xhn               #
 933
 934           movdqa        $Xi,$T2                 # 1st phase
 935           movdqa        $Xi,$T1
 936           psllq         \$5,$Xi
 937           pxor          $Xi,$T1                 #
 938         pclmulqdq       \$0x00,$Hkey,$Xln       #######
 939           psllq         \$1,$Xi
 940           pxor          $T1,$Xi                 #
 941           psllq         \$57,$Xi                #
 942           movdqa        $Xi,$T1                 #
 943           pslldq        \$8,$Xi
 944           psrldq        \$8,$T1                 #
 945           pxor          $T2,$Xi
 946         pshufd          \$0b01001110,$Xhn,$Xmn
 947           pxor          $T1,$Xhi                #
 948         pxor            $Xhn,$Xmn               #
 949
 950           movdqa        $Xi,$T2                 # 2nd phase
 951           psrlq         \$1,$Xi
 952         pclmulqdq       \$0x11,$Hkey,$Xhn       #######
 953           pxor          $T2,$Xhi                #
 954           pxor          $Xi,$T2
 955           psrlq         \$5,$Xi
 956           pxor          $T2,$Xi                 #
 957         lea             32($inp),$inp
 958           psrlq         \$1,$Xi                 #
 959         pclmulqdq       \$0x00,$HK,$Xmn         #######
 960           pxor          $Xhi,$Xi                #
 961
 962         sub             \$0x20,$len
 963         ja              .Lmod_loop
 964
 965 .Leven_tail:
 966          movdqa         $Xi,$Xhi
 967          movdqa         $Xmn,$T1
 968          pshufd         \$0b01001110,$Xi,$Xmn   #
 969          pxor           $Xi,$Xmn                #
 970
 971         pclmulqdq       \$0x00,$Hkey2,$Xi
 972         pclmulqdq       \$0x11,$Hkey2,$Xhi
 973         pclmulqdq       \$0x10,$HK,$Xmn
 974
 975         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 976         pxor            $Xhn,$Xhi
 977         pxor            $Xi,$T1
 978         pxor            $Xhi,$T1
 979         pxor            $T1,$Xmn
 980         movdqa          $Xmn,$T1                #
 981         psrldq          \$8,$T1
 982         pslldq          \$8,$Xmn                #
 983         pxor            $T1,$Xhi
 984         pxor            $Xmn,$Xi                #
 985 ___
 986         &reduction_alg9 ($Xhi,$Xi);
 987 $code.=<<___;
 988         test            $len,$len
 989         jnz             .Ldone
 990
 991 .Lodd_tail:
 992         movdqu          ($inp),$T1              # Ii
 993         pshufb          $T3,$T1
 994         pxor            $T1,$Xi                 # Ii+Xi
 995 ___
 996         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H*(Ii+Xi)
 997         &reduction_alg9 ($Xhi,$Xi);
 998 $code.=<<___;
 999 .Ldone:
1000         pshufb          $T3,$Xi
1001         movdqu          $Xi,($Xip)
1002 ___
1003 $code.=<<___ if ($win64);
1004         movaps  (%rsp),%xmm6
1005         movaps  0x10(%rsp),%xmm7
1006         movaps  0x20(%rsp),%xmm8
1007         movaps  0x30(%rsp),%xmm9
1008         movaps  0x40(%rsp),%xmm10
1009         movaps  0x50(%rsp),%xmm11
1010         movaps  0x60(%rsp),%xmm12
1011         movaps  0x70(%rsp),%xmm13
1012         movaps  0x80(%rsp),%xmm14
1013         movaps  0x90(%rsp),%xmm15
1014         lea     0xa8(%rsp),%rsp
1015 .LSEH_end_gcm_ghash_clmul:
1016 ___
1017 $code.=<<___;
1018         ret
1019 .cfi_endproc
1020 .size   gcm_ghash_clmul,.-gcm_ghash_clmul
1021 ___
1022 }
1023 \f
1024 $code.=<<___;
1025 .globl  gcm_init_avx
1026 .type   gcm_init_avx,\@abi-omnipotent
1027 .align  32
1028 gcm_init_avx:
1029 .cfi_startproc
1030 ___
1031 if ($avx) {
1032 my ($Htbl,$Xip)=@_4args;
1033 my $HK="%xmm6";
1034
1035 $code.=<<___ if ($win64);
1036 .LSEH_begin_gcm_init_avx:
1037         # I can't trust assembler to use specific encoding:-(
1038         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
1039         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
1040 ___
1041 $code.=<<___;
1042         vzeroupper
1043
1044         vmovdqu         ($Xip),$Hkey
1045         vpshufd         \$0b01001110,$Hkey,$Hkey        # dword swap
1046
1047         # <<1 twist
1048         vpshufd         \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
1049         vpsrlq          \$63,$Hkey,$T1
1050         vpsllq          \$1,$Hkey,$Hkey
1051         vpxor           $T3,$T3,$T3             #
1052         vpcmpgtd        $T2,$T3,$T3             # broadcast carry bit
1053         vpslldq         \$8,$T1,$T1
1054         vpor            $T1,$Hkey,$Hkey         # H<<=1
1055
1056         # magic reduction
1057         vpand           .L0x1c2_polynomial(%rip),$T3,$T3
1058         vpxor           $T3,$Hkey,$Hkey         # if(carry) H^=0x1c2_polynomial
1059
1060         vpunpckhqdq     $Hkey,$Hkey,$HK
1061         vmovdqa         $Hkey,$Xi
1062         vpxor           $Hkey,$HK,$HK
1063         mov             \$4,%r10                # up to H^8
1064         jmp             .Linit_start_avx
1065 ___
1066
1067 sub clmul64x64_avx {
1068 my ($Xhi,$Xi,$Hkey,$HK)=@_;
1069
1070 if (!defined($HK)) {    $HK = $T2;
1071 $code.=<<___;
1072         vpunpckhqdq     $Xi,$Xi,$T1
1073         vpunpckhqdq     $Hkey,$Hkey,$T2
1074         vpxor           $Xi,$T1,$T1             #
1075         vpxor           $Hkey,$T2,$T2
1076 ___
1077 } else {
1078 $code.=<<___;
1079         vpunpckhqdq     $Xi,$Xi,$T1
1080         vpxor           $Xi,$T1,$T1             #
1081 ___
1082 }
1083 $code.=<<___;
1084         vpclmulqdq      \$0x11,$Hkey,$Xi,$Xhi   #######
1085         vpclmulqdq      \$0x00,$Hkey,$Xi,$Xi    #######
1086         vpclmulqdq      \$0x00,$HK,$T1,$T1      #######
1087         vpxor           $Xi,$Xhi,$T2            #
1088         vpxor           $T2,$T1,$T1             #
1089
1090         vpslldq         \$8,$T1,$T2             #
1091         vpsrldq         \$8,$T1,$T1
1092         vpxor           $T2,$Xi,$Xi             #
1093         vpxor           $T1,$Xhi,$Xhi
1094 ___
1095 }
1096
1097 sub reduction_avx {
1098 my ($Xhi,$Xi) = @_;
1099
1100 $code.=<<___;
1101         vpsllq          \$57,$Xi,$T1            # 1st phase
1102         vpsllq          \$62,$Xi,$T2
1103         vpxor           $T1,$T2,$T2             #
1104         vpsllq          \$63,$Xi,$T1
1105         vpxor           $T1,$T2,$T2             #
1106         vpslldq         \$8,$T2,$T1             #
1107         vpsrldq         \$8,$T2,$T2
1108         vpxor           $T1,$Xi,$Xi             #
1109         vpxor           $T2,$Xhi,$Xhi
1110
1111         vpsrlq          \$1,$Xi,$T2             # 2nd phase
1112         vpxor           $Xi,$Xhi,$Xhi
1113         vpxor           $T2,$Xi,$Xi             #
1114         vpsrlq          \$5,$T2,$T2
1115         vpxor           $T2,$Xi,$Xi             #
1116         vpsrlq          \$1,$Xi,$Xi             #
1117         vpxor           $Xhi,$Xi,$Xi            #
1118 ___
1119 }
1120
1121 $code.=<<___;
1122 .align  32
1123 .Linit_loop_avx:
1124         vpalignr        \$8,$T1,$T2,$T3         # low part is H.lo^H.hi...
1125         vmovdqu         $T3,-0x10($Htbl)        # save Karatsuba "salt"
1126 ___
1127         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^3,5,7
1128         &reduction_avx  ($Xhi,$Xi);
1129 $code.=<<___;
1130 .Linit_start_avx:
1131         vmovdqa         $Xi,$T3
1132 ___
1133         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^2,4,6,8
1134         &reduction_avx  ($Xhi,$Xi);
1135 $code.=<<___;
1136         vpshufd         \$0b01001110,$T3,$T1
1137         vpshufd         \$0b01001110,$Xi,$T2
1138         vpxor           $T3,$T1,$T1             # Karatsuba pre-processing
1139         vmovdqu         $T3,0x00($Htbl)         # save H^1,3,5,7
1140         vpxor           $Xi,$T2,$T2             # Karatsuba pre-processing
1141         vmovdqu         $Xi,0x10($Htbl)         # save H^2,4,6,8
1142         lea             0x30($Htbl),$Htbl
1143         sub             \$1,%r10
1144         jnz             .Linit_loop_avx
1145
1146         vpalignr        \$8,$T2,$T1,$T3         # last "salt" is flipped
1147         vmovdqu         $T3,-0x10($Htbl)
1148
1149         vzeroupper
1150 ___
1151 $code.=<<___ if ($win64);
1152         movaps  (%rsp),%xmm6
1153         lea     0x18(%rsp),%rsp
1154 .LSEH_end_gcm_init_avx:
1155 ___
1156 $code.=<<___;
1157         ret
1158 .cfi_endproc
1159 .size   gcm_init_avx,.-gcm_init_avx
1160 ___
1161 } else {
1162 $code.=<<___;
1163         jmp     .L_init_clmul
1164 .cfi_endproc
1165 .size   gcm_init_avx,.-gcm_init_avx
1166 ___
1167 }
1168
1169 $code.=<<___;
1170 .globl  gcm_gmult_avx
1171 .type   gcm_gmult_avx,\@abi-omnipotent
1172 .align  32
1173 gcm_gmult_avx:
1174 .cfi_startproc
1175         endbranch
1176         jmp     .L_gmult_clmul
1177 .cfi_endproc
1178 .size   gcm_gmult_avx,.-gcm_gmult_avx
1179 ___
1180 \f
1181 $code.=<<___;
1182 .globl  gcm_ghash_avx
1183 .type   gcm_ghash_avx,\@abi-omnipotent
1184 .align  32
1185 gcm_ghash_avx:
1186 .cfi_startproc
1187         endbranch
1188 ___
1189 if ($avx) {
1190 my ($Xip,$Htbl,$inp,$len)=@_4args;
1191 my ($Xlo,$Xhi,$Xmi,
1192     $Zlo,$Zhi,$Zmi,
1193     $Hkey,$HK,$T1,$T2,
1194     $Xi,$Xo,$Tred,$bswap,$Ii,$Ij) = map("%xmm$_",(0..15));
1195
1196 $code.=<<___ if ($win64);
1197         lea     -0x88(%rsp),%rax
1198 .LSEH_begin_gcm_ghash_avx:
1199         # I can't trust assembler to use specific encoding:-(
1200         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
1201         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
1202         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
1203         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
1204         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
1205         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
1206         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
1207         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
1208         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
1209         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
1210         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
1211 ___
1212 $code.=<<___;
1213         vzeroupper
1214
1215         vmovdqu         ($Xip),$Xi              # load $Xi
1216         lea             .L0x1c2_polynomial(%rip),%r10
1217         lea             0x40($Htbl),$Htbl       # size optimization
1218         vmovdqu         .Lbswap_mask(%rip),$bswap
1219         vpshufb         $bswap,$Xi,$Xi
1220         cmp             \$0x80,$len
1221         jb              .Lshort_avx
1222         sub             \$0x80,$len
1223
1224         vmovdqu         0x70($inp),$Ii          # I[7]
1225         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1226         vpshufb         $bswap,$Ii,$Ii
1227         vmovdqu         0x20-0x40($Htbl),$HK
1228
1229         vpunpckhqdq     $Ii,$Ii,$T2
1230          vmovdqu        0x60($inp),$Ij          # I[6]
1231         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1232         vpxor           $Ii,$T2,$T2
1233          vpshufb        $bswap,$Ij,$Ij
1234         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1235          vmovdqu        0x10-0x40($Htbl),$Hkey  # $Hkey^2
1236          vpunpckhqdq    $Ij,$Ij,$T1
1237          vmovdqu        0x50($inp),$Ii          # I[5]
1238         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1239          vpxor          $Ij,$T1,$T1
1240
1241          vpshufb        $bswap,$Ii,$Ii
1242         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1243          vpunpckhqdq    $Ii,$Ii,$T2
1244         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1245          vmovdqu        0x30-0x40($Htbl),$Hkey  # $Hkey^3
1246          vpxor          $Ii,$T2,$T2
1247          vmovdqu        0x40($inp),$Ij          # I[4]
1248         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1249          vmovdqu        0x50-0x40($Htbl),$HK
1250
1251          vpshufb        $bswap,$Ij,$Ij
1252         vpxor           $Xlo,$Zlo,$Zlo
1253         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1254         vpxor           $Xhi,$Zhi,$Zhi
1255          vpunpckhqdq    $Ij,$Ij,$T1
1256         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1257          vmovdqu        0x40-0x40($Htbl),$Hkey  # $Hkey^4
1258         vpxor           $Xmi,$Zmi,$Zmi
1259         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1260          vpxor          $Ij,$T1,$T1
1261
1262          vmovdqu        0x30($inp),$Ii          # I[3]
1263         vpxor           $Zlo,$Xlo,$Xlo
1264         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1265         vpxor           $Zhi,$Xhi,$Xhi
1266          vpshufb        $bswap,$Ii,$Ii
1267         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1268          vmovdqu        0x60-0x40($Htbl),$Hkey  # $Hkey^5
1269         vpxor           $Zmi,$Xmi,$Xmi
1270          vpunpckhqdq    $Ii,$Ii,$T2
1271         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1272          vmovdqu        0x80-0x40($Htbl),$HK
1273          vpxor          $Ii,$T2,$T2
1274
1275          vmovdqu        0x20($inp),$Ij          # I[2]
1276         vpxor           $Xlo,$Zlo,$Zlo
1277         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1278         vpxor           $Xhi,$Zhi,$Zhi
1279          vpshufb        $bswap,$Ij,$Ij
1280         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1281          vmovdqu        0x70-0x40($Htbl),$Hkey  # $Hkey^6
1282         vpxor           $Xmi,$Zmi,$Zmi
1283          vpunpckhqdq    $Ij,$Ij,$T1
1284         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1285          vpxor          $Ij,$T1,$T1
1286
1287          vmovdqu        0x10($inp),$Ii          # I[1]
1288         vpxor           $Zlo,$Xlo,$Xlo
1289         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1290         vpxor           $Zhi,$Xhi,$Xhi
1291          vpshufb        $bswap,$Ii,$Ii
1292         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1293          vmovdqu        0x90-0x40($Htbl),$Hkey  # $Hkey^7
1294         vpxor           $Zmi,$Xmi,$Xmi
1295          vpunpckhqdq    $Ii,$Ii,$T2
1296         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1297          vmovdqu        0xb0-0x40($Htbl),$HK
1298          vpxor          $Ii,$T2,$T2
1299
1300          vmovdqu        ($inp),$Ij              # I[0]
1301         vpxor           $Xlo,$Zlo,$Zlo
1302         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1303         vpxor           $Xhi,$Zhi,$Zhi
1304          vpshufb        $bswap,$Ij,$Ij
1305         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1306          vmovdqu        0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1307         vpxor           $Xmi,$Zmi,$Zmi
1308         vpclmulqdq      \$0x10,$HK,$T2,$Xmi
1309
1310         lea             0x80($inp),$inp
1311         cmp             \$0x80,$len
1312         jb              .Ltail_avx
1313
1314         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1315         sub             \$0x80,$len
1316         jmp             .Loop8x_avx
1317
1318 .align  32
1319 .Loop8x_avx:
1320         vpunpckhqdq     $Ij,$Ij,$T1
1321          vmovdqu        0x70($inp),$Ii          # I[7]
1322         vpxor           $Xlo,$Zlo,$Zlo
1323         vpxor           $Ij,$T1,$T1
1324         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xi
1325          vpshufb        $bswap,$Ii,$Ii
1326         vpxor           $Xhi,$Zhi,$Zhi
1327         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xo
1328          vmovdqu        0x00-0x40($Htbl),$Hkey  # $Hkey^1
1329          vpunpckhqdq    $Ii,$Ii,$T2
1330         vpxor           $Xmi,$Zmi,$Zmi
1331         vpclmulqdq      \$0x00,$HK,$T1,$Tred
1332          vmovdqu        0x20-0x40($Htbl),$HK
1333          vpxor          $Ii,$T2,$T2
1334
1335           vmovdqu       0x60($inp),$Ij          # I[6]
1336          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1337         vpxor           $Zlo,$Xi,$Xi            # collect result
1338           vpshufb       $bswap,$Ij,$Ij
1339          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1340         vxorps          $Zhi,$Xo,$Xo
1341           vmovdqu       0x10-0x40($Htbl),$Hkey  # $Hkey^2
1342          vpunpckhqdq    $Ij,$Ij,$T1
1343          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1344         vpxor           $Zmi,$Tred,$Tred
1345          vxorps         $Ij,$T1,$T1
1346
1347           vmovdqu       0x50($inp),$Ii          # I[5]
1348         vpxor           $Xi,$Tred,$Tred         # aggregated Karatsuba post-processing
1349          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1350         vpxor           $Xo,$Tred,$Tred
1351         vpslldq         \$8,$Tred,$T2
1352          vpxor          $Xlo,$Zlo,$Zlo
1353          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1354         vpsrldq         \$8,$Tred,$Tred
1355         vpxor           $T2, $Xi, $Xi
1356           vmovdqu       0x30-0x40($Htbl),$Hkey  # $Hkey^3
1357           vpshufb       $bswap,$Ii,$Ii
1358         vxorps          $Tred,$Xo, $Xo
1359          vpxor          $Xhi,$Zhi,$Zhi
1360          vpunpckhqdq    $Ii,$Ii,$T2
1361          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1362           vmovdqu       0x50-0x40($Htbl),$HK
1363          vpxor          $Ii,$T2,$T2
1364          vpxor          $Xmi,$Zmi,$Zmi
1365
1366           vmovdqu       0x40($inp),$Ij          # I[4]
1367         vpalignr        \$8,$Xi,$Xi,$Tred       # 1st phase
1368          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1369           vpshufb       $bswap,$Ij,$Ij
1370          vpxor          $Zlo,$Xlo,$Xlo
1371          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1372           vmovdqu       0x40-0x40($Htbl),$Hkey  # $Hkey^4
1373          vpunpckhqdq    $Ij,$Ij,$T1
1374          vpxor          $Zhi,$Xhi,$Xhi
1375          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1376          vxorps         $Ij,$T1,$T1
1377          vpxor          $Zmi,$Xmi,$Xmi
1378
1379           vmovdqu       0x30($inp),$Ii          # I[3]
1380         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1381          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1382           vpshufb       $bswap,$Ii,$Ii
1383          vpxor          $Xlo,$Zlo,$Zlo
1384          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1385           vmovdqu       0x60-0x40($Htbl),$Hkey  # $Hkey^5
1386          vpunpckhqdq    $Ii,$Ii,$T2
1387          vpxor          $Xhi,$Zhi,$Zhi
1388          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1389           vmovdqu       0x80-0x40($Htbl),$HK
1390          vpxor          $Ii,$T2,$T2
1391          vpxor          $Xmi,$Zmi,$Zmi
1392
1393           vmovdqu       0x20($inp),$Ij          # I[2]
1394          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1395           vpshufb       $bswap,$Ij,$Ij
1396          vpxor          $Zlo,$Xlo,$Xlo
1397          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1398           vmovdqu       0x70-0x40($Htbl),$Hkey  # $Hkey^6
1399          vpunpckhqdq    $Ij,$Ij,$T1
1400          vpxor          $Zhi,$Xhi,$Xhi
1401          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1402          vpxor          $Ij,$T1,$T1
1403          vpxor          $Zmi,$Xmi,$Xmi
1404         vxorps          $Tred,$Xi,$Xi
1405
1406           vmovdqu       0x10($inp),$Ii          # I[1]
1407         vpalignr        \$8,$Xi,$Xi,$Tred       # 2nd phase
1408          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1409           vpshufb       $bswap,$Ii,$Ii
1410          vpxor          $Xlo,$Zlo,$Zlo
1411          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1412           vmovdqu       0x90-0x40($Htbl),$Hkey  # $Hkey^7
1413         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1414         vxorps          $Xo,$Tred,$Tred
1415          vpunpckhqdq    $Ii,$Ii,$T2
1416          vpxor          $Xhi,$Zhi,$Zhi
1417          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1418           vmovdqu       0xb0-0x40($Htbl),$HK
1419          vpxor          $Ii,$T2,$T2
1420          vpxor          $Xmi,$Zmi,$Zmi
1421
1422           vmovdqu       ($inp),$Ij              # I[0]
1423          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1424           vpshufb       $bswap,$Ij,$Ij
1425          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1426           vmovdqu       0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1427         vpxor           $Tred,$Ij,$Ij
1428          vpclmulqdq     \$0x10,$HK,  $T2,$Xmi
1429         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1430
1431         lea             0x80($inp),$inp
1432         sub             \$0x80,$len
1433         jnc             .Loop8x_avx
1434
1435         add             \$0x80,$len
1436         jmp             .Ltail_no_xor_avx
1437
1438 .align  32
1439 .Lshort_avx:
1440         vmovdqu         -0x10($inp,$len),$Ii    # very last word
1441         lea             ($inp,$len),$inp
1442         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1443         vmovdqu         0x20-0x40($Htbl),$HK
1444         vpshufb         $bswap,$Ii,$Ij
1445
1446         vmovdqa         $Xlo,$Zlo               # subtle way to zero $Zlo,
1447         vmovdqa         $Xhi,$Zhi               # $Zhi and
1448         vmovdqa         $Xmi,$Zmi               # $Zmi
1449         sub             \$0x10,$len
1450         jz              .Ltail_avx
1451
1452         vpunpckhqdq     $Ij,$Ij,$T1
1453         vpxor           $Xlo,$Zlo,$Zlo
1454         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1455         vpxor           $Ij,$T1,$T1
1456          vmovdqu        -0x20($inp),$Ii
1457         vpxor           $Xhi,$Zhi,$Zhi
1458         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1459         vmovdqu         0x10-0x40($Htbl),$Hkey  # $Hkey^2
1460          vpshufb        $bswap,$Ii,$Ij
1461         vpxor           $Xmi,$Zmi,$Zmi
1462         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1463         vpsrldq         \$8,$HK,$HK
1464         sub             \$0x10,$len
1465         jz              .Ltail_avx
1466
1467         vpunpckhqdq     $Ij,$Ij,$T1
1468         vpxor           $Xlo,$Zlo,$Zlo
1469         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1470         vpxor           $Ij,$T1,$T1
1471          vmovdqu        -0x30($inp),$Ii
1472         vpxor           $Xhi,$Zhi,$Zhi
1473         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1474         vmovdqu         0x30-0x40($Htbl),$Hkey  # $Hkey^3
1475          vpshufb        $bswap,$Ii,$Ij
1476         vpxor           $Xmi,$Zmi,$Zmi
1477         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1478         vmovdqu         0x50-0x40($Htbl),$HK
1479         sub             \$0x10,$len
1480         jz              .Ltail_avx
1481
1482         vpunpckhqdq     $Ij,$Ij,$T1
1483         vpxor           $Xlo,$Zlo,$Zlo
1484         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1485         vpxor           $Ij,$T1,$T1
1486          vmovdqu        -0x40($inp),$Ii
1487         vpxor           $Xhi,$Zhi,$Zhi
1488         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1489         vmovdqu         0x40-0x40($Htbl),$Hkey  # $Hkey^4
1490          vpshufb        $bswap,$Ii,$Ij
1491         vpxor           $Xmi,$Zmi,$Zmi
1492         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1493         vpsrldq         \$8,$HK,$HK
1494         sub             \$0x10,$len
1495         jz              .Ltail_avx
1496
1497         vpunpckhqdq     $Ij,$Ij,$T1
1498         vpxor           $Xlo,$Zlo,$Zlo
1499         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1500         vpxor           $Ij,$T1,$T1
1501          vmovdqu        -0x50($inp),$Ii
1502         vpxor           $Xhi,$Zhi,$Zhi
1503         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1504         vmovdqu         0x60-0x40($Htbl),$Hkey  # $Hkey^5
1505          vpshufb        $bswap,$Ii,$Ij
1506         vpxor           $Xmi,$Zmi,$Zmi
1507         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1508         vmovdqu         0x80-0x40($Htbl),$HK
1509         sub             \$0x10,$len
1510         jz              .Ltail_avx
1511
1512         vpunpckhqdq     $Ij,$Ij,$T1
1513         vpxor           $Xlo,$Zlo,$Zlo
1514         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1515         vpxor           $Ij,$T1,$T1
1516          vmovdqu        -0x60($inp),$Ii
1517         vpxor           $Xhi,$Zhi,$Zhi
1518         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1519         vmovdqu         0x70-0x40($Htbl),$Hkey  # $Hkey^6
1520          vpshufb        $bswap,$Ii,$Ij
1521         vpxor           $Xmi,$Zmi,$Zmi
1522         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1523         vpsrldq         \$8,$HK,$HK
1524         sub             \$0x10,$len
1525         jz              .Ltail_avx
1526
1527         vpunpckhqdq     $Ij,$Ij,$T1
1528         vpxor           $Xlo,$Zlo,$Zlo
1529         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1530         vpxor           $Ij,$T1,$T1
1531          vmovdqu        -0x70($inp),$Ii
1532         vpxor           $Xhi,$Zhi,$Zhi
1533         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1534         vmovdqu         0x90-0x40($Htbl),$Hkey  # $Hkey^7
1535          vpshufb        $bswap,$Ii,$Ij
1536         vpxor           $Xmi,$Zmi,$Zmi
1537         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1538         vmovq           0xb8-0x40($Htbl),$HK
1539         sub             \$0x10,$len
1540         jmp             .Ltail_avx
1541
1542 .align  32
1543 .Ltail_avx:
1544         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1545 .Ltail_no_xor_avx:
1546         vpunpckhqdq     $Ij,$Ij,$T1
1547         vpxor           $Xlo,$Zlo,$Zlo
1548         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1549         vpxor           $Ij,$T1,$T1
1550         vpxor           $Xhi,$Zhi,$Zhi
1551         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1552         vpxor           $Xmi,$Zmi,$Zmi
1553         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1554
1555         vmovdqu         (%r10),$Tred
1556
1557         vpxor           $Xlo,$Zlo,$Xi
1558         vpxor           $Xhi,$Zhi,$Xo
1559         vpxor           $Xmi,$Zmi,$Zmi
1560
1561         vpxor           $Xi, $Zmi,$Zmi          # aggregated Karatsuba post-processing
1562         vpxor           $Xo, $Zmi,$Zmi
1563         vpslldq         \$8, $Zmi,$T2
1564         vpsrldq         \$8, $Zmi,$Zmi
1565         vpxor           $T2, $Xi, $Xi
1566         vpxor           $Zmi,$Xo, $Xo
1567
1568         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 1st phase
1569         vpalignr        \$8,$Xi,$Xi,$Xi
1570         vpxor           $T2,$Xi,$Xi
1571
1572         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 2nd phase
1573         vpalignr        \$8,$Xi,$Xi,$Xi
1574         vpxor           $Xo,$Xi,$Xi
1575         vpxor           $T2,$Xi,$Xi
1576
1577         cmp             \$0,$len
1578         jne             .Lshort_avx
1579
1580         vpshufb         $bswap,$Xi,$Xi
1581         vmovdqu         $Xi,($Xip)
1582         vzeroupper
1583 ___
1584 $code.=<<___ if ($win64);
1585         movaps  (%rsp),%xmm6
1586         movaps  0x10(%rsp),%xmm7
1587         movaps  0x20(%rsp),%xmm8
1588         movaps  0x30(%rsp),%xmm9
1589         movaps  0x40(%rsp),%xmm10
1590         movaps  0x50(%rsp),%xmm11
1591         movaps  0x60(%rsp),%xmm12
1592         movaps  0x70(%rsp),%xmm13
1593         movaps  0x80(%rsp),%xmm14
1594         movaps  0x90(%rsp),%xmm15
1595         lea     0xa8(%rsp),%rsp
1596 .LSEH_end_gcm_ghash_avx:
1597 ___
1598 $code.=<<___;
1599         ret
1600 .cfi_endproc
1601 .size   gcm_ghash_avx,.-gcm_ghash_avx
1602 ___
1603 } else {
1604 $code.=<<___;
1605         jmp     .L_ghash_clmul
1606 .cfi_endproc
1607 .size   gcm_ghash_avx,.-gcm_ghash_avx
1608 ___
1609 }
1610 \f
1611 $code.=<<___;
1612 .align  64
1613 .Lbswap_mask:
1614         .byte   15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
1615 .L0x1c2_polynomial:
1616         .byte   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2
1617 .L7_mask:
1618         .long   7,0,7,0
1619 .L7_mask_poly:
1620         .long   7,0,`0xE1<<1`,0
1621 .align  64
1622 .type   .Lrem_4bit,\@object
1623 .Lrem_4bit:
1624         .long   0,`0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`
1625         .long   0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
1626         .long   0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
1627         .long   0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
1628 .type   .Lrem_8bit,\@object
1629 .Lrem_8bit:
1630         .value  0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
1631         .value  0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
1632         .value  0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
1633         .value  0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
1634         .value  0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
1635         .value  0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
1636         .value  0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
1637         .value  0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
1638         .value  0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
1639         .value  0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
1640         .value  0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
1641         .value  0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
1642         .value  0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
1643         .value  0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
1644         .value  0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
1645         .value  0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
1646         .value  0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
1647         .value  0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
1648         .value  0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
1649         .value  0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
1650         .value  0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
1651         .value  0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
1652         .value  0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
1653         .value  0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
1654         .value  0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
1655         .value  0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
1656         .value  0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
1657         .value  0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
1658         .value  0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
1659         .value  0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
1660         .value  0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
1661         .value  0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
1662
1663 .asciz  "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
1664 .align  64
1665 ___
1666 \f
1667 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
1668 #               CONTEXT *context,DISPATCHER_CONTEXT *disp)
1669 if ($win64) {
1670 $rec="%rcx";
1671 $frame="%rdx";
1672 $context="%r8";
1673 $disp="%r9";
1674
1675 $code.=<<___;
1676 .extern __imp_RtlVirtualUnwind
1677 .type   se_handler,\@abi-omnipotent
1678 .align  16
1679 se_handler:
1680         push    %rsi
1681         push    %rdi
1682         push    %rbx
1683         push    %rbp
1684         push    %r12
1685         push    %r13
1686         push    %r14
1687         push    %r15
1688         pushfq
1689         sub     \$64,%rsp
1690
1691         mov     120($context),%rax      # pull context->Rax
1692         mov     248($context),%rbx      # pull context->Rip
1693
1694         mov     8($disp),%rsi           # disp->ImageBase
1695         mov     56($disp),%r11          # disp->HandlerData
1696
1697         mov     0(%r11),%r10d           # HandlerData[0]
1698         lea     (%rsi,%r10),%r10        # prologue label
1699         cmp     %r10,%rbx               # context->Rip<prologue label
1700         jb      .Lin_prologue
1701
1702         mov     152($context),%rax      # pull context->Rsp
1703
1704         mov     4(%r11),%r10d           # HandlerData[1]
1705         lea     (%rsi,%r10),%r10        # epilogue label
1706         cmp     %r10,%rbx               # context->Rip>=epilogue label
1707         jae     .Lin_prologue
1708
1709         lea     48+280(%rax),%rax       # adjust "rsp"
1710
1711         mov     -8(%rax),%rbx
1712         mov     -16(%rax),%rbp
1713         mov     -24(%rax),%r12
1714         mov     -32(%rax),%r13
1715         mov     -40(%rax),%r14
1716         mov     -48(%rax),%r15
1717         mov     %rbx,144($context)      # restore context->Rbx
1718         mov     %rbp,160($context)      # restore context->Rbp
1719         mov     %r12,216($context)      # restore context->R12
1720         mov     %r13,224($context)      # restore context->R13
1721         mov     %r14,232($context)      # restore context->R14
1722         mov     %r15,240($context)      # restore context->R15
1723
1724 .Lin_prologue:
1725         mov     8(%rax),%rdi
1726         mov     16(%rax),%rsi
1727         mov     %rax,152($context)      # restore context->Rsp
1728         mov     %rsi,168($context)      # restore context->Rsi
1729         mov     %rdi,176($context)      # restore context->Rdi
1730
1731         mov     40($disp),%rdi          # disp->ContextRecord
1732         mov     $context,%rsi           # context
1733         mov     \$`1232/8`,%ecx         # sizeof(CONTEXT)
1734         .long   0xa548f3fc              # cld; rep movsq
1735
1736         mov     $disp,%rsi
1737         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
1738         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
1739         mov     0(%rsi),%r8             # arg3, disp->ControlPc
1740         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
1741         mov     40(%rsi),%r10           # disp->ContextRecord
1742         lea     56(%rsi),%r11           # &disp->HandlerData
1743         lea     24(%rsi),%r12           # &disp->EstablisherFrame
1744         mov     %r10,32(%rsp)           # arg5
1745         mov     %r11,40(%rsp)           # arg6
1746         mov     %r12,48(%rsp)           # arg7
1747         mov     %rcx,56(%rsp)           # arg8, (NULL)
1748         call    *__imp_RtlVirtualUnwind(%rip)
1749
1750         mov     \$1,%eax                # ExceptionContinueSearch
1751         add     \$64,%rsp
1752         popfq
1753         pop     %r15
1754         pop     %r14
1755         pop     %r13
1756         pop     %r12
1757         pop     %rbp
1758         pop     %rbx
1759         pop     %rdi
1760         pop     %rsi
1761         ret
1762 .size   se_handler,.-se_handler
1763
1764 .section        .pdata
1765 .align  4
1766         .rva    .LSEH_begin_gcm_gmult_4bit
1767         .rva    .LSEH_end_gcm_gmult_4bit
1768         .rva    .LSEH_info_gcm_gmult_4bit
1769
1770         .rva    .LSEH_begin_gcm_ghash_4bit
1771         .rva    .LSEH_end_gcm_ghash_4bit
1772         .rva    .LSEH_info_gcm_ghash_4bit
1773
1774         .rva    .LSEH_begin_gcm_init_clmul
1775         .rva    .LSEH_end_gcm_init_clmul
1776         .rva    .LSEH_info_gcm_init_clmul
1777
1778         .rva    .LSEH_begin_gcm_ghash_clmul
1779         .rva    .LSEH_end_gcm_ghash_clmul
1780         .rva    .LSEH_info_gcm_ghash_clmul
1781 ___
1782 $code.=<<___    if ($avx);
1783         .rva    .LSEH_begin_gcm_init_avx
1784         .rva    .LSEH_end_gcm_init_avx
1785         .rva    .LSEH_info_gcm_init_clmul
1786
1787         .rva    .LSEH_begin_gcm_ghash_avx
1788         .rva    .LSEH_end_gcm_ghash_avx
1789         .rva    .LSEH_info_gcm_ghash_clmul
1790 ___
1791 $code.=<<___;
1792 .section        .xdata
1793 .align  8
1794 .LSEH_info_gcm_gmult_4bit:
1795         .byte   9,0,0,0
1796         .rva    se_handler
1797         .rva    .Lgmult_prologue,.Lgmult_epilogue       # HandlerData
1798 .LSEH_info_gcm_ghash_4bit:
1799         .byte   9,0,0,0
1800         .rva    se_handler
1801         .rva    .Lghash_prologue,.Lghash_epilogue       # HandlerData
1802 .LSEH_info_gcm_init_clmul:
1803         .byte   0x01,0x08,0x03,0x00
1804         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1805         .byte   0x04,0x22,0x00,0x00     #sub    rsp,0x18
1806 .LSEH_info_gcm_ghash_clmul:
1807         .byte   0x01,0x33,0x16,0x00
1808         .byte   0x33,0xf8,0x09,0x00     #movaps 0x90(rsp),xmm15
1809         .byte   0x2e,0xe8,0x08,0x00     #movaps 0x80(rsp),xmm14
1810         .byte   0x29,0xd8,0x07,0x00     #movaps 0x70(rsp),xmm13
1811         .byte   0x24,0xc8,0x06,0x00     #movaps 0x60(rsp),xmm12
1812         .byte   0x1f,0xb8,0x05,0x00     #movaps 0x50(rsp),xmm11
1813         .byte   0x1a,0xa8,0x04,0x00     #movaps 0x40(rsp),xmm10
1814         .byte   0x15,0x98,0x03,0x00     #movaps 0x30(rsp),xmm9
1815         .byte   0x10,0x88,0x02,0x00     #movaps 0x20(rsp),xmm8
1816         .byte   0x0c,0x78,0x01,0x00     #movaps 0x10(rsp),xmm7
1817         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1818         .byte   0x04,0x01,0x15,0x00     #sub    rsp,0xa8
1819 ___
1820 }
1821 \f
1822 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
1823
1824 print $code;
1825
1826 close STDOUT or die "error closing STDOUT: $!";