crypto/modes/asm/ghash-x86_64.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 # March, June 2010
  11 #
  12 # The module implements "4-bit" GCM GHASH function and underlying
  13 # single multiplication operation in GF(2^128). "4-bit" means that
  14 # it uses 256 bytes per-key table [+128 bytes shared table]. GHASH
  15 # function features so called "528B" variant utilizing additional
  16 # 256+16 bytes of per-key storage [+512 bytes shared table].
  17 # Performance results are for this streamed GHASH subroutine and are
  18 # expressed in cycles per processed byte, less is better:
  19 #
  20 #               gcc 3.4.x(*)    assembler
  21 #
  22 # P4            28.6            14.0            +100%
  23 # Opteron       19.3            7.7             +150%
  24 # Core2         17.8            8.1(**)         +120%
  25 # Atom          31.6            16.8            +88%
  26 # VIA Nano      21.8            10.1            +115%
  27 #
  28 # (*)   comparison is not completely fair, because C results are
  29 #       for vanilla "256B" implementation, while assembler results
  30 #       are for "528B";-)
  31 # (**)  it's mystery [to me] why Core2 result is not same as for
  32 #       Opteron;
  33
  34 # May 2010
  35 #
  36 # Add PCLMULQDQ version performing at 2.02 cycles per processed byte.
  37 # See ghash-x86.pl for background information and details about coding
  38 # techniques.
  39 #
  40 # Special thanks to David Woodhouse <dwmw2@infradead.org> for
  41 # providing access to a Westmere-based system on behalf of Intel
  42 # Open Source Technology Centre.
  43
  44 # December 2012
  45 #
  46 # Overhaul: aggregate Karatsuba post-processing, improve ILP in
  47 # reduction_alg9, increase reduction aggregate factor to 4x. As for
  48 # the latter. ghash-x86.pl discusses that it makes lesser sense to
  49 # increase aggregate factor. Then why increase here? Critical path
  50 # consists of 3 independent pclmulqdq instructions, Karatsuba post-
  51 # processing and reduction. "On top" of this we lay down aggregated
  52 # multiplication operations, triplets of independent pclmulqdq's. As
  53 # issue rate for pclmulqdq is limited, it makes lesser sense to
  54 # aggregate more multiplications than it takes to perform remaining
  55 # non-multiplication operations. 2x is near-optimal coefficient for
  56 # contemporary Intel CPUs (therefore modest improvement coefficient),
  57 # but not for Bulldozer. Latter is because logical SIMD operations
  58 # are twice as slow in comparison to Intel, so that critical path is
  59 # longer. A CPU with higher pclmulqdq issue rate would also benefit
  60 # from higher aggregate factor...
  61 #
  62 # Westmere      1.78(+13%)
  63 # Sandy Bridge  1.80(+8%)
  64 # Ivy Bridge    1.80(+7%)
  65 # Haswell       0.55(+93%) (if system doesn't support AVX)
  66 # Broadwell     0.45(+110%)(if system doesn't support AVX)
  67 # Bulldozer     1.49(+27%)
  68 # Silvermont    2.88(+13%)
  69
  70 # March 2013
  71 #
  72 # ... 8x aggregate factor AVX code path is using reduction algorithm
  73 # suggested by Shay Gueron[1]. Even though contemporary AVX-capable
  74 # CPUs such as Sandy and Ivy Bridge can execute it, the code performs
  75 # sub-optimally in comparison to above mentioned version. But thanks
  76 # to Ilya Albrekht and Max Locktyukhin of Intel Corp. we knew that
  77 # it performs in 0.41 cycles per byte on Haswell processor, and in
  78 # 0.29 on Broadwell.
  79 #
  80 # [1] http://rt.openssl.org/Ticket/Display.html?id=2900&user=guest&pass=guest
  81
  82 $flavour = shift;
  83 $output  = shift;
  84 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
  85
  86 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  87
  88 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  89 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  90 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
  91 die "can't locate x86_64-xlate.pl";
  92
  93 if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
  94                 =~ /GNU assembler version ([2-9]\.[0-9]+)/) {
  95         $avx = ($1>=2.19) + ($1>=2.22);
  96 }
  97
  98 if (!$avx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
  99             `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
 100         $avx = ($1>=2.09) + ($1>=2.10);
 101 }
 102
 103 if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
 104             `ml64 2>&1` =~ /Version ([0-9]+)\./) {
 105         $avx = ($1>=10) + ($1>=11);
 106 }
 107
 108 if (!$avx && `$ENV{CC} -v 2>&1` =~ /(^clang version|based on LLVM) ([3-9]\.[0-9]+)/) {
 109         $avx = ($2>=3.0) + ($2>3.0);
 110 }
 111
 112 open OUT,"| \"$^X\" $xlate $flavour $output";
 113 *STDOUT=*OUT;
 114
 115 $do4xaggr=1;
 116
 117 # common register layout
 118 $nlo="%rax";
 119 $nhi="%rbx";
 120 $Zlo="%r8";
 121 $Zhi="%r9";
 122 $tmp="%r10";
 123 $rem_4bit = "%r11";
 124
 125 $Xi="%rdi";
 126 $Htbl="%rsi";
 127
 128 # per-function register layout
 129 $cnt="%rcx";
 130 $rem="%rdx";
 131
 132 sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/     or
 133                         $r =~ s/%[er]([sd]i)/%\1l/      or
 134                         $r =~ s/%[er](bp)/%\1l/         or
 135                         $r =~ s/%(r[0-9]+)[d]?/%\1b/;   $r; }
 136
 137 sub AUTOLOAD()          # thunk [simplified] 32-bit style perlasm
 138 { my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
 139   my $arg = pop;
 140     $arg = "\$$arg" if ($arg*1 eq $arg);
 141     $code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
 142 }
 143 \f
 144 { my $N;
 145   sub loop() {
 146   my $inp = shift;
 147
 148         $N++;
 149 $code.=<<___;
 150         xor     $nlo,$nlo
 151         xor     $nhi,$nhi
 152         mov     `&LB("$Zlo")`,`&LB("$nlo")`
 153         mov     `&LB("$Zlo")`,`&LB("$nhi")`
 154         shl     \$4,`&LB("$nlo")`
 155         mov     \$14,$cnt
 156         mov     8($Htbl,$nlo),$Zlo
 157         mov     ($Htbl,$nlo),$Zhi
 158         and     \$0xf0,`&LB("$nhi")`
 159         mov     $Zlo,$rem
 160         jmp     .Loop$N
 161
 162 .align  16
 163 .Loop$N:
 164         shr     \$4,$Zlo
 165         and     \$0xf,$rem
 166         mov     $Zhi,$tmp
 167         mov     ($inp,$cnt),`&LB("$nlo")`
 168         shr     \$4,$Zhi
 169         xor     8($Htbl,$nhi),$Zlo
 170         shl     \$60,$tmp
 171         xor     ($Htbl,$nhi),$Zhi
 172         mov     `&LB("$nlo")`,`&LB("$nhi")`
 173         xor     ($rem_4bit,$rem,8),$Zhi
 174         mov     $Zlo,$rem
 175         shl     \$4,`&LB("$nlo")`
 176         xor     $tmp,$Zlo
 177         dec     $cnt
 178         js      .Lbreak$N
 179
 180         shr     \$4,$Zlo
 181         and     \$0xf,$rem
 182         mov     $Zhi,$tmp
 183         shr     \$4,$Zhi
 184         xor     8($Htbl,$nlo),$Zlo
 185         shl     \$60,$tmp
 186         xor     ($Htbl,$nlo),$Zhi
 187         and     \$0xf0,`&LB("$nhi")`
 188         xor     ($rem_4bit,$rem,8),$Zhi
 189         mov     $Zlo,$rem
 190         xor     $tmp,$Zlo
 191         jmp     .Loop$N
 192
 193 .align  16
 194 .Lbreak$N:
 195         shr     \$4,$Zlo
 196         and     \$0xf,$rem
 197         mov     $Zhi,$tmp
 198         shr     \$4,$Zhi
 199         xor     8($Htbl,$nlo),$Zlo
 200         shl     \$60,$tmp
 201         xor     ($Htbl,$nlo),$Zhi
 202         and     \$0xf0,`&LB("$nhi")`
 203         xor     ($rem_4bit,$rem,8),$Zhi
 204         mov     $Zlo,$rem
 205         xor     $tmp,$Zlo
 206
 207         shr     \$4,$Zlo
 208         and     \$0xf,$rem
 209         mov     $Zhi,$tmp
 210         shr     \$4,$Zhi
 211         xor     8($Htbl,$nhi),$Zlo
 212         shl     \$60,$tmp
 213         xor     ($Htbl,$nhi),$Zhi
 214         xor     $tmp,$Zlo
 215         xor     ($rem_4bit,$rem,8),$Zhi
 216
 217         bswap   $Zlo
 218         bswap   $Zhi
 219 ___
 220 }}
 221
 222 $code=<<___;
 223 .text
 224 .extern OPENSSL_ia32cap_P
 225
 226 .globl  gcm_gmult_4bit
 227 .type   gcm_gmult_4bit,\@function,2
 228 .align  16
 229 gcm_gmult_4bit:
 230         push    %rbx
 231         push    %rbp            # %rbp and %r12 are pushed exclusively in
 232         push    %r12            # order to reuse Win64 exception handler...
 233 .Lgmult_prologue:
 234
 235         movzb   15($Xi),$Zlo
 236         lea     .Lrem_4bit(%rip),$rem_4bit
 237 ___
 238         &loop   ($Xi);
 239 $code.=<<___;
 240         mov     $Zlo,8($Xi)
 241         mov     $Zhi,($Xi)
 242
 243         mov     16(%rsp),%rbx
 244         lea     24(%rsp),%rsp
 245 .Lgmult_epilogue:
 246         ret
 247 .size   gcm_gmult_4bit,.-gcm_gmult_4bit
 248 ___
 249 \f
 250 # per-function register layout
 251 $inp="%rdx";
 252 $len="%rcx";
 253 $rem_8bit=$rem_4bit;
 254
 255 $code.=<<___;
 256 .globl  gcm_ghash_4bit
 257 .type   gcm_ghash_4bit,\@function,4
 258 .align  16
 259 gcm_ghash_4bit:
 260         push    %rbx
 261         push    %rbp
 262         push    %r12
 263         push    %r13
 264         push    %r14
 265         push    %r15
 266         sub     \$280,%rsp
 267 .Lghash_prologue:
 268         mov     $inp,%r14               # reassign couple of args
 269         mov     $len,%r15
 270 ___
 271 { my $inp="%r14";
 272   my $dat="%edx";
 273   my $len="%r15";
 274   my @nhi=("%ebx","%ecx");
 275   my @rem=("%r12","%r13");
 276   my $Hshr4="%rbp";
 277
 278         &sub    ($Htbl,-128);           # size optimization
 279         &lea    ($Hshr4,"16+128(%rsp)");
 280         { my @lo =($nlo,$nhi);
 281           my @hi =($Zlo,$Zhi);
 282
 283           &xor  ($dat,$dat);
 284           for ($i=0,$j=-2;$i<18;$i++,$j++) {
 285             &mov        ("$j(%rsp)",&LB($dat))          if ($i>1);
 286             &or         ($lo[0],$tmp)                   if ($i>1);
 287             &mov        (&LB($dat),&LB($lo[1]))         if ($i>0 && $i<17);
 288             &shr        ($lo[1],4)                      if ($i>0 && $i<17);
 289             &mov        ($tmp,$hi[1])                   if ($i>0 && $i<17);
 290             &shr        ($hi[1],4)                      if ($i>0 && $i<17);
 291             &mov        ("8*$j($Hshr4)",$hi[0])         if ($i>1);
 292             &mov        ($hi[0],"16*$i+0-128($Htbl)")   if ($i<16);
 293             &shl        (&LB($dat),4)                   if ($i>0 && $i<17);
 294             &mov        ("8*$j-128($Hshr4)",$lo[0])     if ($i>1);
 295             &mov        ($lo[0],"16*$i+8-128($Htbl)")   if ($i<16);
 296             &shl        ($tmp,60)                       if ($i>0 && $i<17);
 297
 298             push        (@lo,shift(@lo));
 299             push        (@hi,shift(@hi));
 300           }
 301         }
 302         &add    ($Htbl,-128);
 303         &mov    ($Zlo,"8($Xi)");
 304         &mov    ($Zhi,"0($Xi)");
 305         &add    ($len,$inp);            # pointer to the end of data
 306         &lea    ($rem_8bit,".Lrem_8bit(%rip)");
 307         &jmp    (".Louter_loop");
 308
 309 $code.=".align  16\n.Louter_loop:\n";
 310         &xor    ($Zhi,"($inp)");
 311         &mov    ("%rdx","8($inp)");
 312         &lea    ($inp,"16($inp)");
 313         &xor    ("%rdx",$Zlo);
 314         &mov    ("($Xi)",$Zhi);
 315         &mov    ("8($Xi)","%rdx");
 316         &shr    ("%rdx",32);
 317
 318         &xor    ($nlo,$nlo);
 319         &rol    ($dat,8);
 320         &mov    (&LB($nlo),&LB($dat));
 321         &movz   ($nhi[0],&LB($dat));
 322         &shl    (&LB($nlo),4);
 323         &shr    ($nhi[0],4);
 324
 325         for ($j=11,$i=0;$i<15;$i++) {
 326             &rol        ($dat,8);
 327             &xor        ($Zlo,"8($Htbl,$nlo)")                  if ($i>0);
 328             &xor        ($Zhi,"($Htbl,$nlo)")                   if ($i>0);
 329             &mov        ($Zlo,"8($Htbl,$nlo)")                  if ($i==0);
 330             &mov        ($Zhi,"($Htbl,$nlo)")                   if ($i==0);
 331
 332             &mov        (&LB($nlo),&LB($dat));
 333             &xor        ($Zlo,$tmp)                             if ($i>0);
 334             &movzw      ($rem[1],"($rem_8bit,$rem[1],2)")       if ($i>0);
 335
 336             &movz       ($nhi[1],&LB($dat));
 337             &shl        (&LB($nlo),4);
 338             &movzb      ($rem[0],"(%rsp,$nhi[0])");
 339
 340             &shr        ($nhi[1],4)                             if ($i<14);
 341             &and        ($nhi[1],0xf0)                          if ($i==14);
 342             &shl        ($rem[1],48)                            if ($i>0);
 343             &xor        ($rem[0],$Zlo);
 344
 345             &mov        ($tmp,$Zhi);
 346             &xor        ($Zhi,$rem[1])                          if ($i>0);
 347             &shr        ($Zlo,8);
 348
 349             &movz       ($rem[0],&LB($rem[0]));
 350             &mov        ($dat,"$j($Xi)")                        if (--$j%4==0);
 351             &shr        ($Zhi,8);
 352
 353             &xor        ($Zlo,"-128($Hshr4,$nhi[0],8)");
 354             &shl        ($tmp,56);
 355             &xor        ($Zhi,"($Hshr4,$nhi[0],8)");
 356
 357             unshift     (@nhi,pop(@nhi));               # "rotate" registers
 358             unshift     (@rem,pop(@rem));
 359         }
 360         &movzw  ($rem[1],"($rem_8bit,$rem[1],2)");
 361         &xor    ($Zlo,"8($Htbl,$nlo)");
 362         &xor    ($Zhi,"($Htbl,$nlo)");
 363
 364         &shl    ($rem[1],48);
 365         &xor    ($Zlo,$tmp);
 366
 367         &xor    ($Zhi,$rem[1]);
 368         &movz   ($rem[0],&LB($Zlo));
 369         &shr    ($Zlo,4);
 370
 371         &mov    ($tmp,$Zhi);
 372         &shl    (&LB($rem[0]),4);
 373         &shr    ($Zhi,4);
 374
 375         &xor    ($Zlo,"8($Htbl,$nhi[0])");
 376         &movzw  ($rem[0],"($rem_8bit,$rem[0],2)");
 377         &shl    ($tmp,60);
 378
 379         &xor    ($Zhi,"($Htbl,$nhi[0])");
 380         &xor    ($Zlo,$tmp);
 381         &shl    ($rem[0],48);
 382
 383         &bswap  ($Zlo);
 384         &xor    ($Zhi,$rem[0]);
 385
 386         &bswap  ($Zhi);
 387         &cmp    ($inp,$len);
 388         &jb     (".Louter_loop");
 389 }
 390 $code.=<<___;
 391         mov     $Zlo,8($Xi)
 392         mov     $Zhi,($Xi)
 393
 394         lea     280(%rsp),%rsi
 395         mov     0(%rsi),%r15
 396         mov     8(%rsi),%r14
 397         mov     16(%rsi),%r13
 398         mov     24(%rsi),%r12
 399         mov     32(%rsi),%rbp
 400         mov     40(%rsi),%rbx
 401         lea     48(%rsi),%rsp
 402 .Lghash_epilogue:
 403         ret
 404 .size   gcm_ghash_4bit,.-gcm_ghash_4bit
 405 ___
 406 \f
 407 ######################################################################
 408 # PCLMULQDQ version.
 409
 410 @_4args=$win64? ("%rcx","%rdx","%r8", "%r9") :  # Win64 order
 411                 ("%rdi","%rsi","%rdx","%rcx");  # Unix order
 412
 413 ($Xi,$Xhi)=("%xmm0","%xmm1");   $Hkey="%xmm2";
 414 ($T1,$T2,$T3)=("%xmm3","%xmm4","%xmm5");
 415
 416 sub clmul64x64_T2 {     # minimal register pressure
 417 my ($Xhi,$Xi,$Hkey,$HK)=@_;
 418
 419 if (!defined($HK)) {    $HK = $T2;
 420 $code.=<<___;
 421         movdqa          $Xi,$Xhi                #
 422         pshufd          \$0b01001110,$Xi,$T1
 423         pshufd          \$0b01001110,$Hkey,$T2
 424         pxor            $Xi,$T1                 #
 425         pxor            $Hkey,$T2
 426 ___
 427 } else {
 428 $code.=<<___;
 429         movdqa          $Xi,$Xhi                #
 430         pshufd          \$0b01001110,$Xi,$T1
 431         pxor            $Xi,$T1                 #
 432 ___
 433 }
 434 $code.=<<___;
 435         pclmulqdq       \$0x00,$Hkey,$Xi        #######
 436         pclmulqdq       \$0x11,$Hkey,$Xhi       #######
 437         pclmulqdq       \$0x00,$HK,$T1          #######
 438         pxor            $Xi,$T1                 #
 439         pxor            $Xhi,$T1                #
 440
 441         movdqa          $T1,$T2                 #
 442         psrldq          \$8,$T1
 443         pslldq          \$8,$T2                 #
 444         pxor            $T1,$Xhi
 445         pxor            $T2,$Xi                 #
 446 ___
 447 }
 448
 449 sub reduction_alg9 {    # 17/11 times faster than Intel version
 450 my ($Xhi,$Xi) = @_;
 451
 452 $code.=<<___;
 453         # 1st phase
 454         movdqa          $Xi,$T2                 #
 455         movdqa          $Xi,$T1
 456         psllq           \$5,$Xi
 457         pxor            $Xi,$T1                 #
 458         psllq           \$1,$Xi
 459         pxor            $T1,$Xi                 #
 460         psllq           \$57,$Xi                #
 461         movdqa          $Xi,$T1                 #
 462         pslldq          \$8,$Xi
 463         psrldq          \$8,$T1                 #
 464         pxor            $T2,$Xi
 465         pxor            $T1,$Xhi                #
 466
 467         # 2nd phase
 468         movdqa          $Xi,$T2
 469         psrlq           \$1,$Xi
 470         pxor            $T2,$Xhi                #
 471         pxor            $Xi,$T2
 472         psrlq           \$5,$Xi
 473         pxor            $T2,$Xi                 #
 474         psrlq           \$1,$Xi                 #
 475         pxor            $Xhi,$Xi                #
 476 ___
 477 }
 478 \f
 479 { my ($Htbl,$Xip)=@_4args;
 480   my $HK="%xmm6";
 481
 482 $code.=<<___;
 483 .globl  gcm_init_clmul
 484 .type   gcm_init_clmul,\@abi-omnipotent
 485 .align  16
 486 gcm_init_clmul:
 487 .L_init_clmul:
 488 ___
 489 $code.=<<___ if ($win64);
 490 .LSEH_begin_gcm_init_clmul:
 491         # I can't trust assembler to use specific encoding:-(
 492         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
 493         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
 494 ___
 495 $code.=<<___;
 496         movdqu          ($Xip),$Hkey
 497         pshufd          \$0b01001110,$Hkey,$Hkey        # dword swap
 498
 499         # <<1 twist
 500         pshufd          \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
 501         movdqa          $Hkey,$T1
 502         psllq           \$1,$Hkey
 503         pxor            $T3,$T3                 #
 504         psrlq           \$63,$T1
 505         pcmpgtd         $T2,$T3                 # broadcast carry bit
 506         pslldq          \$8,$T1
 507         por             $T1,$Hkey               # H<<=1
 508
 509         # magic reduction
 510         pand            .L0x1c2_polynomial(%rip),$T3
 511         pxor            $T3,$Hkey               # if(carry) H^=0x1c2_polynomial
 512
 513         # calculate H^2
 514         pshufd          \$0b01001110,$Hkey,$HK
 515         movdqa          $Hkey,$Xi
 516         pxor            $Hkey,$HK
 517 ___
 518         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);
 519         &reduction_alg9 ($Xhi,$Xi);
 520 $code.=<<___;
 521         pshufd          \$0b01001110,$Hkey,$T1
 522         pshufd          \$0b01001110,$Xi,$T2
 523         pxor            $Hkey,$T1               # Karatsuba pre-processing
 524         movdqu          $Hkey,0x00($Htbl)       # save H
 525         pxor            $Xi,$T2                 # Karatsuba pre-processing
 526         movdqu          $Xi,0x10($Htbl)         # save H^2
 527         palignr         \$8,$T1,$T2             # low part is H.lo^H.hi...
 528         movdqu          $T2,0x20($Htbl)         # save Karatsuba "salt"
 529 ___
 530 if ($do4xaggr) {
 531         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^3
 532         &reduction_alg9 ($Xhi,$Xi);
 533 $code.=<<___;
 534         movdqa          $Xi,$T3
 535 ___
 536         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^4
 537         &reduction_alg9 ($Xhi,$Xi);
 538 $code.=<<___;
 539         pshufd          \$0b01001110,$T3,$T1
 540         pshufd          \$0b01001110,$Xi,$T2
 541         pxor            $T3,$T1                 # Karatsuba pre-processing
 542         movdqu          $T3,0x30($Htbl)         # save H^3
 543         pxor            $Xi,$T2                 # Karatsuba pre-processing
 544         movdqu          $Xi,0x40($Htbl)         # save H^4
 545         palignr         \$8,$T1,$T2             # low part is H^3.lo^H^3.hi...
 546         movdqu          $T2,0x50($Htbl)         # save Karatsuba "salt"
 547 ___
 548 }
 549 $code.=<<___ if ($win64);
 550         movaps  (%rsp),%xmm6
 551         lea     0x18(%rsp),%rsp
 552 .LSEH_end_gcm_init_clmul:
 553 ___
 554 $code.=<<___;
 555         ret
 556 .size   gcm_init_clmul,.-gcm_init_clmul
 557 ___
 558 }
 559
 560 { my ($Xip,$Htbl)=@_4args;
 561
 562 $code.=<<___;
 563 .globl  gcm_gmult_clmul
 564 .type   gcm_gmult_clmul,\@abi-omnipotent
 565 .align  16
 566 gcm_gmult_clmul:
 567 .L_gmult_clmul:
 568         movdqu          ($Xip),$Xi
 569         movdqa          .Lbswap_mask(%rip),$T3
 570         movdqu          ($Htbl),$Hkey
 571         movdqu          0x20($Htbl),$T2
 572         pshufb          $T3,$Xi
 573 ___
 574         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$T2);
 575 $code.=<<___ if (0 || (&reduction_alg9($Xhi,$Xi)&&0));
 576         # experimental alternative. special thing about is that there
 577         # no dependency between the two multiplications...
 578         mov             \$`0xE1<<1`,%eax
 579         mov             \$0xA040608020C0E000,%r10       # ((7..0)·0xE0)&0xff
 580         mov             \$0x07,%r11d
 581         movq            %rax,$T1
 582         movq            %r10,$T2
 583         movq            %r11,$T3                # borrow $T3
 584         pand            $Xi,$T3
 585         pshufb          $T3,$T2                 # ($Xi&7)·0xE0
 586         movq            %rax,$T3
 587         pclmulqdq       \$0x00,$Xi,$T1          # ·(0xE1<<1)
 588         pxor            $Xi,$T2
 589         pslldq          \$15,$T2
 590         paddd           $T2,$T2                 # <<(64+56+1)
 591         pxor            $T2,$Xi
 592         pclmulqdq       \$0x01,$T3,$Xi
 593         movdqa          .Lbswap_mask(%rip),$T3  # reload $T3
 594         psrldq          \$1,$T1
 595         pxor            $T1,$Xhi
 596         pslldq          \$7,$Xi
 597         pxor            $Xhi,$Xi
 598 ___
 599 $code.=<<___;
 600         pshufb          $T3,$Xi
 601         movdqu          $Xi,($Xip)
 602         ret
 603 .size   gcm_gmult_clmul,.-gcm_gmult_clmul
 604 ___
 605 }
 606 \f
 607 { my ($Xip,$Htbl,$inp,$len)=@_4args;
 608   my ($Xln,$Xmn,$Xhn,$Hkey2,$HK) = map("%xmm$_",(3..7));
 609   my ($T1,$T2,$T3)=map("%xmm$_",(8..10));
 610
 611 $code.=<<___;
 612 .globl  gcm_ghash_clmul
 613 .type   gcm_ghash_clmul,\@abi-omnipotent
 614 .align  32
 615 gcm_ghash_clmul:
 616 .L_ghash_clmul:
 617 ___
 618 $code.=<<___ if ($win64);
 619         lea     -0x88(%rsp),%rax
 620 .LSEH_begin_gcm_ghash_clmul:
 621         # I can't trust assembler to use specific encoding:-(
 622         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
 623         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
 624         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
 625         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
 626         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
 627         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
 628         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
 629         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
 630         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
 631         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
 632         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
 633 ___
 634 $code.=<<___;
 635         movdqa          .Lbswap_mask(%rip),$T3
 636
 637         movdqu          ($Xip),$Xi
 638         movdqu          ($Htbl),$Hkey
 639         movdqu          0x20($Htbl),$HK
 640         pshufb          $T3,$Xi
 641
 642         sub             \$0x10,$len
 643         jz              .Lodd_tail
 644
 645         movdqu          0x10($Htbl),$Hkey2
 646 ___
 647 if ($do4xaggr) {
 648 my ($Xl,$Xm,$Xh,$Hkey3,$Hkey4)=map("%xmm$_",(11..15));
 649
 650 $code.=<<___;
 651         mov             OPENSSL_ia32cap_P+4(%rip),%eax
 652         cmp             \$0x30,$len
 653         jb              .Lskip4x
 654
 655         and             \$`1<<26|1<<22`,%eax    # isolate MOVBE+XSAVE
 656         cmp             \$`1<<22`,%eax          # check for MOVBE without XSAVE
 657         je              .Lskip4x
 658
 659         sub             \$0x30,$len
 660         mov             \$0xA040608020C0E000,%rax       # ((7..0)·0xE0)&0xff
 661         movdqu          0x30($Htbl),$Hkey3
 662         movdqu          0x40($Htbl),$Hkey4
 663
 664         #######
 665         # Xi+4 =[(H*Ii+3) + (H^2*Ii+2) + (H^3*Ii+1) + H^4*(Ii+Xi)] mod P
 666         #
 667         movdqu          0x30($inp),$Xln
 668          movdqu         0x20($inp),$Xl
 669         pshufb          $T3,$Xln
 670          pshufb         $T3,$Xl
 671         movdqa          $Xln,$Xhn
 672         pshufd          \$0b01001110,$Xln,$Xmn
 673         pxor            $Xln,$Xmn
 674         pclmulqdq       \$0x00,$Hkey,$Xln
 675         pclmulqdq       \$0x11,$Hkey,$Xhn
 676         pclmulqdq       \$0x00,$HK,$Xmn
 677
 678         movdqa          $Xl,$Xh
 679         pshufd          \$0b01001110,$Xl,$Xm
 680         pxor            $Xl,$Xm
 681         pclmulqdq       \$0x00,$Hkey2,$Xl
 682         pclmulqdq       \$0x11,$Hkey2,$Xh
 683         pclmulqdq       \$0x10,$HK,$Xm
 684         xorps           $Xl,$Xln
 685         xorps           $Xh,$Xhn
 686         movups          0x50($Htbl),$HK
 687         xorps           $Xm,$Xmn
 688
 689         movdqu          0x10($inp),$Xl
 690          movdqu         0($inp),$T1
 691         pshufb          $T3,$Xl
 692          pshufb         $T3,$T1
 693         movdqa          $Xl,$Xh
 694         pshufd          \$0b01001110,$Xl,$Xm
 695          pxor           $T1,$Xi
 696         pxor            $Xl,$Xm
 697         pclmulqdq       \$0x00,$Hkey3,$Xl
 698          movdqa         $Xi,$Xhi
 699          pshufd         \$0b01001110,$Xi,$T1
 700          pxor           $Xi,$T1
 701         pclmulqdq       \$0x11,$Hkey3,$Xh
 702         pclmulqdq       \$0x00,$HK,$Xm
 703         xorps           $Xl,$Xln
 704         xorps           $Xh,$Xhn
 705
 706         lea     0x40($inp),$inp
 707         sub     \$0x40,$len
 708         jc      .Ltail4x
 709
 710         jmp     .Lmod4_loop
 711 .align  32
 712 .Lmod4_loop:
 713         pclmulqdq       \$0x00,$Hkey4,$Xi
 714         xorps           $Xm,$Xmn
 715          movdqu         0x30($inp),$Xl
 716          pshufb         $T3,$Xl
 717         pclmulqdq       \$0x11,$Hkey4,$Xhi
 718         xorps           $Xln,$Xi
 719          movdqu         0x20($inp),$Xln
 720          movdqa         $Xl,$Xh
 721         pclmulqdq       \$0x10,$HK,$T1
 722          pshufd         \$0b01001110,$Xl,$Xm
 723         xorps           $Xhn,$Xhi
 724          pxor           $Xl,$Xm
 725          pshufb         $T3,$Xln
 726         movups          0x20($Htbl),$HK
 727         xorps           $Xmn,$T1
 728          pclmulqdq      \$0x00,$Hkey,$Xl
 729          pshufd         \$0b01001110,$Xln,$Xmn
 730
 731         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 732          movdqa         $Xln,$Xhn
 733         pxor            $Xhi,$T1                #
 734          pxor           $Xln,$Xmn
 735         movdqa          $T1,$T2                 #
 736          pclmulqdq      \$0x11,$Hkey,$Xh
 737         pslldq          \$8,$T1
 738         psrldq          \$8,$T2                 #
 739         pxor            $T1,$Xi
 740         movdqa          .L7_mask(%rip),$T1
 741         pxor            $T2,$Xhi                #
 742         movq            %rax,$T2
 743
 744         pand            $Xi,$T1                 # 1st phase
 745         pshufb          $T1,$T2                 #
 746         pxor            $Xi,$T2                 #
 747          pclmulqdq      \$0x00,$HK,$Xm
 748         psllq           \$57,$T2                #
 749         movdqa          $T2,$T1                 #
 750         pslldq          \$8,$T2
 751          pclmulqdq      \$0x00,$Hkey2,$Xln
 752         psrldq          \$8,$T1                 #
 753         pxor            $T2,$Xi
 754         pxor            $T1,$Xhi                #
 755         movdqu          0($inp),$T1
 756
 757         movdqa          $Xi,$T2                 # 2nd phase
 758         psrlq           \$1,$Xi
 759          pclmulqdq      \$0x11,$Hkey2,$Xhn
 760          xorps          $Xl,$Xln
 761          movdqu         0x10($inp),$Xl
 762          pshufb         $T3,$Xl
 763          pclmulqdq      \$0x10,$HK,$Xmn
 764          xorps          $Xh,$Xhn
 765          movups         0x50($Htbl),$HK
 766         pshufb          $T3,$T1
 767         pxor            $T2,$Xhi                #
 768         pxor            $Xi,$T2
 769         psrlq           \$5,$Xi
 770
 771          movdqa         $Xl,$Xh
 772          pxor           $Xm,$Xmn
 773          pshufd         \$0b01001110,$Xl,$Xm
 774         pxor            $T2,$Xi                 #
 775         pxor            $T1,$Xhi
 776          pxor           $Xl,$Xm
 777          pclmulqdq      \$0x00,$Hkey3,$Xl
 778         psrlq           \$1,$Xi                 #
 779         pxor            $Xhi,$Xi                #
 780         movdqa          $Xi,$Xhi
 781          pclmulqdq      \$0x11,$Hkey3,$Xh
 782          xorps          $Xl,$Xln
 783         pshufd          \$0b01001110,$Xi,$T1
 784         pxor            $Xi,$T1
 785
 786          pclmulqdq      \$0x00,$HK,$Xm
 787          xorps          $Xh,$Xhn
 788
 789         lea     0x40($inp),$inp
 790         sub     \$0x40,$len
 791         jnc     .Lmod4_loop
 792
 793 .Ltail4x:
 794         pclmulqdq       \$0x00,$Hkey4,$Xi
 795         pclmulqdq       \$0x11,$Hkey4,$Xhi
 796         pclmulqdq       \$0x10,$HK,$T1
 797         xorps           $Xm,$Xmn
 798         xorps           $Xln,$Xi
 799         xorps           $Xhn,$Xhi
 800         pxor            $Xi,$Xhi                # aggregated Karatsuba post-processing
 801         pxor            $Xmn,$T1
 802
 803         pxor            $Xhi,$T1                #
 804         pxor            $Xi,$Xhi
 805
 806         movdqa          $T1,$T2                 #
 807         psrldq          \$8,$T1
 808         pslldq          \$8,$T2                 #
 809         pxor            $T1,$Xhi
 810         pxor            $T2,$Xi                 #
 811 ___
 812         &reduction_alg9($Xhi,$Xi);
 813 $code.=<<___;
 814         add     \$0x40,$len
 815         jz      .Ldone
 816         movdqu  0x20($Htbl),$HK
 817         sub     \$0x10,$len
 818         jz      .Lodd_tail
 819 .Lskip4x:
 820 ___
 821 }
 822 $code.=<<___;
 823         #######
 824         # Xi+2 =[H*(Ii+1 + Xi+1)] mod P =
 825         #       [(H*Ii+1) + (H*Xi+1)] mod P =
 826         #       [(H*Ii+1) + H^2*(Ii+Xi)] mod P
 827         #
 828         movdqu          ($inp),$T1              # Ii
 829         movdqu          16($inp),$Xln           # Ii+1
 830         pshufb          $T3,$T1
 831         pshufb          $T3,$Xln
 832         pxor            $T1,$Xi                 # Ii+Xi
 833
 834         movdqa          $Xln,$Xhn
 835         pshufd          \$0b01001110,$Xln,$Xmn
 836         pxor            $Xln,$Xmn
 837         pclmulqdq       \$0x00,$Hkey,$Xln
 838         pclmulqdq       \$0x11,$Hkey,$Xhn
 839         pclmulqdq       \$0x00,$HK,$Xmn
 840
 841         lea             32($inp),$inp           # i+=2
 842         nop
 843         sub             \$0x20,$len
 844         jbe             .Leven_tail
 845         nop
 846         jmp             .Lmod_loop
 847
 848 .align  32
 849 .Lmod_loop:
 850         movdqa          $Xi,$Xhi
 851         movdqa          $Xmn,$T1
 852         pshufd          \$0b01001110,$Xi,$Xmn   #
 853         pxor            $Xi,$Xmn                #
 854
 855         pclmulqdq       \$0x00,$Hkey2,$Xi
 856         pclmulqdq       \$0x11,$Hkey2,$Xhi
 857         pclmulqdq       \$0x10,$HK,$Xmn
 858
 859         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 860         pxor            $Xhn,$Xhi
 861           movdqu        ($inp),$T2              # Ii
 862         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 863           pshufb        $T3,$T2
 864           movdqu        16($inp),$Xln           # Ii+1
 865
 866         pxor            $Xhi,$T1
 867           pxor          $T2,$Xhi                # "Ii+Xi", consume early
 868         pxor            $T1,$Xmn
 869          pshufb         $T3,$Xln
 870         movdqa          $Xmn,$T1                #
 871         psrldq          \$8,$T1
 872         pslldq          \$8,$Xmn                #
 873         pxor            $T1,$Xhi
 874         pxor            $Xmn,$Xi                #
 875
 876         movdqa          $Xln,$Xhn               #
 877
 878           movdqa        $Xi,$T2                 # 1st phase
 879           movdqa        $Xi,$T1
 880           psllq         \$5,$Xi
 881           pxor          $Xi,$T1                 #
 882         pclmulqdq       \$0x00,$Hkey,$Xln       #######
 883           psllq         \$1,$Xi
 884           pxor          $T1,$Xi                 #
 885           psllq         \$57,$Xi                #
 886           movdqa        $Xi,$T1                 #
 887           pslldq        \$8,$Xi
 888           psrldq        \$8,$T1                 #
 889           pxor          $T2,$Xi
 890         pshufd          \$0b01001110,$Xhn,$Xmn
 891           pxor          $T1,$Xhi                #
 892         pxor            $Xhn,$Xmn               #
 893
 894           movdqa        $Xi,$T2                 # 2nd phase
 895           psrlq         \$1,$Xi
 896         pclmulqdq       \$0x11,$Hkey,$Xhn       #######
 897           pxor          $T2,$Xhi                #
 898           pxor          $Xi,$T2
 899           psrlq         \$5,$Xi
 900           pxor          $T2,$Xi                 #
 901         lea             32($inp),$inp
 902           psrlq         \$1,$Xi                 #
 903         pclmulqdq       \$0x00,$HK,$Xmn         #######
 904           pxor          $Xhi,$Xi                #
 905
 906         sub             \$0x20,$len
 907         ja              .Lmod_loop
 908
 909 .Leven_tail:
 910          movdqa         $Xi,$Xhi
 911          movdqa         $Xmn,$T1
 912          pshufd         \$0b01001110,$Xi,$Xmn   #
 913          pxor           $Xi,$Xmn                #
 914
 915         pclmulqdq       \$0x00,$Hkey2,$Xi
 916         pclmulqdq       \$0x11,$Hkey2,$Xhi
 917         pclmulqdq       \$0x10,$HK,$Xmn
 918
 919         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 920         pxor            $Xhn,$Xhi
 921         pxor            $Xi,$T1
 922         pxor            $Xhi,$T1
 923         pxor            $T1,$Xmn
 924         movdqa          $Xmn,$T1                #
 925         psrldq          \$8,$T1
 926         pslldq          \$8,$Xmn                #
 927         pxor            $T1,$Xhi
 928         pxor            $Xmn,$Xi                #
 929 ___
 930         &reduction_alg9 ($Xhi,$Xi);
 931 $code.=<<___;
 932         test            $len,$len
 933         jnz             .Ldone
 934
 935 .Lodd_tail:
 936         movdqu          ($inp),$T1              # Ii
 937         pshufb          $T3,$T1
 938         pxor            $T1,$Xi                 # Ii+Xi
 939 ___
 940         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H*(Ii+Xi)
 941         &reduction_alg9 ($Xhi,$Xi);
 942 $code.=<<___;
 943 .Ldone:
 944         pshufb          $T3,$Xi
 945         movdqu          $Xi,($Xip)
 946 ___
 947 $code.=<<___ if ($win64);
 948         movaps  (%rsp),%xmm6
 949         movaps  0x10(%rsp),%xmm7
 950         movaps  0x20(%rsp),%xmm8
 951         movaps  0x30(%rsp),%xmm9
 952         movaps  0x40(%rsp),%xmm10
 953         movaps  0x50(%rsp),%xmm11
 954         movaps  0x60(%rsp),%xmm12
 955         movaps  0x70(%rsp),%xmm13
 956         movaps  0x80(%rsp),%xmm14
 957         movaps  0x90(%rsp),%xmm15
 958         lea     0xa8(%rsp),%rsp
 959 .LSEH_end_gcm_ghash_clmul:
 960 ___
 961 $code.=<<___;
 962         ret
 963 .size   gcm_ghash_clmul,.-gcm_ghash_clmul
 964 ___
 965 }
 966 \f
 967 $code.=<<___;
 968 .globl  gcm_init_avx
 969 .type   gcm_init_avx,\@abi-omnipotent
 970 .align  32
 971 gcm_init_avx:
 972 ___
 973 if ($avx) {
 974 my ($Htbl,$Xip)=@_4args;
 975 my $HK="%xmm6";
 976
 977 $code.=<<___ if ($win64);
 978 .LSEH_begin_gcm_init_avx:
 979         # I can't trust assembler to use specific encoding:-(
 980         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
 981         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
 982 ___
 983 $code.=<<___;
 984         vzeroupper
 985
 986         vmovdqu         ($Xip),$Hkey
 987         vpshufd         \$0b01001110,$Hkey,$Hkey        # dword swap
 988
 989         # <<1 twist
 990         vpshufd         \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
 991         vpsrlq          \$63,$Hkey,$T1
 992         vpsllq          \$1,$Hkey,$Hkey
 993         vpxor           $T3,$T3,$T3             #
 994         vpcmpgtd        $T2,$T3,$T3             # broadcast carry bit
 995         vpslldq         \$8,$T1,$T1
 996         vpor            $T1,$Hkey,$Hkey         # H<<=1
 997
 998         # magic reduction
 999         vpand           .L0x1c2_polynomial(%rip),$T3,$T3
1000         vpxor           $T3,$Hkey,$Hkey         # if(carry) H^=0x1c2_polynomial
1001
1002         vpunpckhqdq     $Hkey,$Hkey,$HK
1003         vmovdqa         $Hkey,$Xi
1004         vpxor           $Hkey,$HK,$HK
1005         mov             \$4,%r10                # up to H^8
1006         jmp             .Linit_start_avx
1007 ___
1008
1009 sub clmul64x64_avx {
1010 my ($Xhi,$Xi,$Hkey,$HK)=@_;
1011
1012 if (!defined($HK)) {    $HK = $T2;
1013 $code.=<<___;
1014         vpunpckhqdq     $Xi,$Xi,$T1
1015         vpunpckhqdq     $Hkey,$Hkey,$T2
1016         vpxor           $Xi,$T1,$T1             #
1017         vpxor           $Hkey,$T2,$T2
1018 ___
1019 } else {
1020 $code.=<<___;
1021         vpunpckhqdq     $Xi,$Xi,$T1
1022         vpxor           $Xi,$T1,$T1             #
1023 ___
1024 }
1025 $code.=<<___;
1026         vpclmulqdq      \$0x11,$Hkey,$Xi,$Xhi   #######
1027         vpclmulqdq      \$0x00,$Hkey,$Xi,$Xi    #######
1028         vpclmulqdq      \$0x00,$HK,$T1,$T1      #######
1029         vpxor           $Xi,$Xhi,$T2            #
1030         vpxor           $T2,$T1,$T1             #
1031
1032         vpslldq         \$8,$T1,$T2             #
1033         vpsrldq         \$8,$T1,$T1
1034         vpxor           $T2,$Xi,$Xi             #
1035         vpxor           $T1,$Xhi,$Xhi
1036 ___
1037 }
1038
1039 sub reduction_avx {
1040 my ($Xhi,$Xi) = @_;
1041
1042 $code.=<<___;
1043         vpsllq          \$57,$Xi,$T1            # 1st phase
1044         vpsllq          \$62,$Xi,$T2
1045         vpxor           $T1,$T2,$T2             #
1046         vpsllq          \$63,$Xi,$T1
1047         vpxor           $T1,$T2,$T2             #
1048         vpslldq         \$8,$T2,$T1             #
1049         vpsrldq         \$8,$T2,$T2
1050         vpxor           $T1,$Xi,$Xi             #
1051         vpxor           $T2,$Xhi,$Xhi
1052
1053         vpsrlq          \$1,$Xi,$T2             # 2nd phase
1054         vpxor           $Xi,$Xhi,$Xhi
1055         vpxor           $T2,$Xi,$Xi             #
1056         vpsrlq          \$5,$T2,$T2
1057         vpxor           $T2,$Xi,$Xi             #
1058         vpsrlq          \$1,$Xi,$Xi             #
1059         vpxor           $Xhi,$Xi,$Xi            #
1060 ___
1061 }
1062
1063 $code.=<<___;
1064 .align  32
1065 .Linit_loop_avx:
1066         vpalignr        \$8,$T1,$T2,$T3         # low part is H.lo^H.hi...
1067         vmovdqu         $T3,-0x10($Htbl)        # save Karatsuba "salt"
1068 ___
1069         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^3,5,7
1070         &reduction_avx  ($Xhi,$Xi);
1071 $code.=<<___;
1072 .Linit_start_avx:
1073         vmovdqa         $Xi,$T3
1074 ___
1075         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^2,4,6,8
1076         &reduction_avx  ($Xhi,$Xi);
1077 $code.=<<___;
1078         vpshufd         \$0b01001110,$T3,$T1
1079         vpshufd         \$0b01001110,$Xi,$T2
1080         vpxor           $T3,$T1,$T1             # Karatsuba pre-processing
1081         vmovdqu         $T3,0x00($Htbl)         # save H^1,3,5,7
1082         vpxor           $Xi,$T2,$T2             # Karatsuba pre-processing
1083         vmovdqu         $Xi,0x10($Htbl)         # save H^2,4,6,8
1084         lea             0x30($Htbl),$Htbl
1085         sub             \$1,%r10
1086         jnz             .Linit_loop_avx
1087
1088         vpalignr        \$8,$T2,$T1,$T3         # last "salt" is flipped
1089         vmovdqu         $T3,-0x10($Htbl)
1090
1091         vzeroupper
1092 ___
1093 $code.=<<___ if ($win64);
1094         movaps  (%rsp),%xmm6
1095         lea     0x18(%rsp),%rsp
1096 .LSEH_end_gcm_init_avx:
1097 ___
1098 $code.=<<___;
1099         ret
1100 .size   gcm_init_avx,.-gcm_init_avx
1101 ___
1102 } else {
1103 $code.=<<___;
1104         jmp     .L_init_clmul
1105 .size   gcm_init_avx,.-gcm_init_avx
1106 ___
1107 }
1108
1109 $code.=<<___;
1110 .globl  gcm_gmult_avx
1111 .type   gcm_gmult_avx,\@abi-omnipotent
1112 .align  32
1113 gcm_gmult_avx:
1114         jmp     .L_gmult_clmul
1115 .size   gcm_gmult_avx,.-gcm_gmult_avx
1116 ___
1117 \f
1118 $code.=<<___;
1119 .globl  gcm_ghash_avx
1120 .type   gcm_ghash_avx,\@abi-omnipotent
1121 .align  32
1122 gcm_ghash_avx:
1123 ___
1124 if ($avx) {
1125 my ($Xip,$Htbl,$inp,$len)=@_4args;
1126 my ($Xlo,$Xhi,$Xmi,
1127     $Zlo,$Zhi,$Zmi,
1128     $Hkey,$HK,$T1,$T2,
1129     $Xi,$Xo,$Tred,$bswap,$Ii,$Ij) = map("%xmm$_",(0..15));
1130
1131 $code.=<<___ if ($win64);
1132         lea     -0x88(%rsp),%rax
1133 .LSEH_begin_gcm_ghash_avx:
1134         # I can't trust assembler to use specific encoding:-(
1135         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
1136         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
1137         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
1138         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
1139         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
1140         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
1141         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
1142         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
1143         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
1144         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
1145         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
1146 ___
1147 $code.=<<___;
1148         vzeroupper
1149
1150         vmovdqu         ($Xip),$Xi              # load $Xi
1151         lea             .L0x1c2_polynomial(%rip),%r10
1152         lea             0x40($Htbl),$Htbl       # size optimization
1153         vmovdqu         .Lbswap_mask(%rip),$bswap
1154         vpshufb         $bswap,$Xi,$Xi
1155         cmp             \$0x80,$len
1156         jb              .Lshort_avx
1157         sub             \$0x80,$len
1158
1159         vmovdqu         0x70($inp),$Ii          # I[7]
1160         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1161         vpshufb         $bswap,$Ii,$Ii
1162         vmovdqu         0x20-0x40($Htbl),$HK
1163
1164         vpunpckhqdq     $Ii,$Ii,$T2
1165          vmovdqu        0x60($inp),$Ij          # I[6]
1166         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1167         vpxor           $Ii,$T2,$T2
1168          vpshufb        $bswap,$Ij,$Ij
1169         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1170          vmovdqu        0x10-0x40($Htbl),$Hkey  # $Hkey^2
1171          vpunpckhqdq    $Ij,$Ij,$T1
1172          vmovdqu        0x50($inp),$Ii          # I[5]
1173         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1174          vpxor          $Ij,$T1,$T1
1175
1176          vpshufb        $bswap,$Ii,$Ii
1177         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1178          vpunpckhqdq    $Ii,$Ii,$T2
1179         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1180          vmovdqu        0x30-0x40($Htbl),$Hkey  # $Hkey^3
1181          vpxor          $Ii,$T2,$T2
1182          vmovdqu        0x40($inp),$Ij          # I[4]
1183         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1184          vmovdqu        0x50-0x40($Htbl),$HK
1185
1186          vpshufb        $bswap,$Ij,$Ij
1187         vpxor           $Xlo,$Zlo,$Zlo
1188         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1189         vpxor           $Xhi,$Zhi,$Zhi
1190          vpunpckhqdq    $Ij,$Ij,$T1
1191         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1192          vmovdqu        0x40-0x40($Htbl),$Hkey  # $Hkey^4
1193         vpxor           $Xmi,$Zmi,$Zmi
1194         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1195          vpxor          $Ij,$T1,$T1
1196
1197          vmovdqu        0x30($inp),$Ii          # I[3]
1198         vpxor           $Zlo,$Xlo,$Xlo
1199         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1200         vpxor           $Zhi,$Xhi,$Xhi
1201          vpshufb        $bswap,$Ii,$Ii
1202         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1203          vmovdqu        0x60-0x40($Htbl),$Hkey  # $Hkey^5
1204         vpxor           $Zmi,$Xmi,$Xmi
1205          vpunpckhqdq    $Ii,$Ii,$T2
1206         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1207          vmovdqu        0x80-0x40($Htbl),$HK
1208          vpxor          $Ii,$T2,$T2
1209
1210          vmovdqu        0x20($inp),$Ij          # I[2]
1211         vpxor           $Xlo,$Zlo,$Zlo
1212         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1213         vpxor           $Xhi,$Zhi,$Zhi
1214          vpshufb        $bswap,$Ij,$Ij
1215         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1216          vmovdqu        0x70-0x40($Htbl),$Hkey  # $Hkey^6
1217         vpxor           $Xmi,$Zmi,$Zmi
1218          vpunpckhqdq    $Ij,$Ij,$T1
1219         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1220          vpxor          $Ij,$T1,$T1
1221
1222          vmovdqu        0x10($inp),$Ii          # I[1]
1223         vpxor           $Zlo,$Xlo,$Xlo
1224         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1225         vpxor           $Zhi,$Xhi,$Xhi
1226          vpshufb        $bswap,$Ii,$Ii
1227         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1228          vmovdqu        0x90-0x40($Htbl),$Hkey  # $Hkey^7
1229         vpxor           $Zmi,$Xmi,$Xmi
1230          vpunpckhqdq    $Ii,$Ii,$T2
1231         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1232          vmovdqu        0xb0-0x40($Htbl),$HK
1233          vpxor          $Ii,$T2,$T2
1234
1235          vmovdqu        ($inp),$Ij              # I[0]
1236         vpxor           $Xlo,$Zlo,$Zlo
1237         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1238         vpxor           $Xhi,$Zhi,$Zhi
1239          vpshufb        $bswap,$Ij,$Ij
1240         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1241          vmovdqu        0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1242         vpxor           $Xmi,$Zmi,$Zmi
1243         vpclmulqdq      \$0x10,$HK,$T2,$Xmi
1244
1245         lea             0x80($inp),$inp
1246         cmp             \$0x80,$len
1247         jb              .Ltail_avx
1248
1249         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1250         sub             \$0x80,$len
1251         jmp             .Loop8x_avx
1252
1253 .align  32
1254 .Loop8x_avx:
1255         vpunpckhqdq     $Ij,$Ij,$T1
1256          vmovdqu        0x70($inp),$Ii          # I[7]
1257         vpxor           $Xlo,$Zlo,$Zlo
1258         vpxor           $Ij,$T1,$T1
1259         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xi
1260          vpshufb        $bswap,$Ii,$Ii
1261         vpxor           $Xhi,$Zhi,$Zhi
1262         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xo
1263          vmovdqu        0x00-0x40($Htbl),$Hkey  # $Hkey^1
1264          vpunpckhqdq    $Ii,$Ii,$T2
1265         vpxor           $Xmi,$Zmi,$Zmi
1266         vpclmulqdq      \$0x00,$HK,$T1,$Tred
1267          vmovdqu        0x20-0x40($Htbl),$HK
1268          vpxor          $Ii,$T2,$T2
1269
1270           vmovdqu       0x60($inp),$Ij          # I[6]
1271          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1272         vpxor           $Zlo,$Xi,$Xi            # collect result
1273           vpshufb       $bswap,$Ij,$Ij
1274          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1275         vxorps          $Zhi,$Xo,$Xo
1276           vmovdqu       0x10-0x40($Htbl),$Hkey  # $Hkey^2
1277          vpunpckhqdq    $Ij,$Ij,$T1
1278          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1279         vpxor           $Zmi,$Tred,$Tred
1280          vxorps         $Ij,$T1,$T1
1281
1282           vmovdqu       0x50($inp),$Ii          # I[5]
1283         vpxor           $Xi,$Tred,$Tred         # aggregated Karatsuba post-processing
1284          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1285         vpxor           $Xo,$Tred,$Tred
1286         vpslldq         \$8,$Tred,$T2
1287          vpxor          $Xlo,$Zlo,$Zlo
1288          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1289         vpsrldq         \$8,$Tred,$Tred
1290         vpxor           $T2, $Xi, $Xi
1291           vmovdqu       0x30-0x40($Htbl),$Hkey  # $Hkey^3
1292           vpshufb       $bswap,$Ii,$Ii
1293         vxorps          $Tred,$Xo, $Xo
1294          vpxor          $Xhi,$Zhi,$Zhi
1295          vpunpckhqdq    $Ii,$Ii,$T2
1296          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1297           vmovdqu       0x50-0x40($Htbl),$HK
1298          vpxor          $Ii,$T2,$T2
1299          vpxor          $Xmi,$Zmi,$Zmi
1300
1301           vmovdqu       0x40($inp),$Ij          # I[4]
1302         vpalignr        \$8,$Xi,$Xi,$Tred       # 1st phase
1303          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1304           vpshufb       $bswap,$Ij,$Ij
1305          vpxor          $Zlo,$Xlo,$Xlo
1306          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1307           vmovdqu       0x40-0x40($Htbl),$Hkey  # $Hkey^4
1308          vpunpckhqdq    $Ij,$Ij,$T1
1309          vpxor          $Zhi,$Xhi,$Xhi
1310          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1311          vxorps         $Ij,$T1,$T1
1312          vpxor          $Zmi,$Xmi,$Xmi
1313
1314           vmovdqu       0x30($inp),$Ii          # I[3]
1315         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1316          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1317           vpshufb       $bswap,$Ii,$Ii
1318          vpxor          $Xlo,$Zlo,$Zlo
1319          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1320           vmovdqu       0x60-0x40($Htbl),$Hkey  # $Hkey^5
1321          vpunpckhqdq    $Ii,$Ii,$T2
1322          vpxor          $Xhi,$Zhi,$Zhi
1323          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1324           vmovdqu       0x80-0x40($Htbl),$HK
1325          vpxor          $Ii,$T2,$T2
1326          vpxor          $Xmi,$Zmi,$Zmi
1327
1328           vmovdqu       0x20($inp),$Ij          # I[2]
1329          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1330           vpshufb       $bswap,$Ij,$Ij
1331          vpxor          $Zlo,$Xlo,$Xlo
1332          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1333           vmovdqu       0x70-0x40($Htbl),$Hkey  # $Hkey^6
1334          vpunpckhqdq    $Ij,$Ij,$T1
1335          vpxor          $Zhi,$Xhi,$Xhi
1336          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1337          vpxor          $Ij,$T1,$T1
1338          vpxor          $Zmi,$Xmi,$Xmi
1339         vxorps          $Tred,$Xi,$Xi
1340
1341           vmovdqu       0x10($inp),$Ii          # I[1]
1342         vpalignr        \$8,$Xi,$Xi,$Tred       # 2nd phase
1343          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1344           vpshufb       $bswap,$Ii,$Ii
1345          vpxor          $Xlo,$Zlo,$Zlo
1346          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1347           vmovdqu       0x90-0x40($Htbl),$Hkey  # $Hkey^7
1348         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1349         vxorps          $Xo,$Tred,$Tred
1350          vpunpckhqdq    $Ii,$Ii,$T2
1351          vpxor          $Xhi,$Zhi,$Zhi
1352          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1353           vmovdqu       0xb0-0x40($Htbl),$HK
1354          vpxor          $Ii,$T2,$T2
1355          vpxor          $Xmi,$Zmi,$Zmi
1356
1357           vmovdqu       ($inp),$Ij              # I[0]
1358          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1359           vpshufb       $bswap,$Ij,$Ij
1360          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1361           vmovdqu       0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1362         vpxor           $Tred,$Ij,$Ij
1363          vpclmulqdq     \$0x10,$HK,  $T2,$Xmi
1364         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1365
1366         lea             0x80($inp),$inp
1367         sub             \$0x80,$len
1368         jnc             .Loop8x_avx
1369
1370         add             \$0x80,$len
1371         jmp             .Ltail_no_xor_avx
1372
1373 .align  32
1374 .Lshort_avx:
1375         vmovdqu         -0x10($inp,$len),$Ii    # very last word
1376         lea             ($inp,$len),$inp
1377         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1378         vmovdqu         0x20-0x40($Htbl),$HK
1379         vpshufb         $bswap,$Ii,$Ij
1380
1381         vmovdqa         $Xlo,$Zlo               # subtle way to zero $Zlo,
1382         vmovdqa         $Xhi,$Zhi               # $Zhi and
1383         vmovdqa         $Xmi,$Zmi               # $Zmi
1384         sub             \$0x10,$len
1385         jz              .Ltail_avx
1386
1387         vpunpckhqdq     $Ij,$Ij,$T1
1388         vpxor           $Xlo,$Zlo,$Zlo
1389         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1390         vpxor           $Ij,$T1,$T1
1391          vmovdqu        -0x20($inp),$Ii
1392         vpxor           $Xhi,$Zhi,$Zhi
1393         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1394         vmovdqu         0x10-0x40($Htbl),$Hkey  # $Hkey^2
1395          vpshufb        $bswap,$Ii,$Ij
1396         vpxor           $Xmi,$Zmi,$Zmi
1397         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1398         vpsrldq         \$8,$HK,$HK
1399         sub             \$0x10,$len
1400         jz              .Ltail_avx
1401
1402         vpunpckhqdq     $Ij,$Ij,$T1
1403         vpxor           $Xlo,$Zlo,$Zlo
1404         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1405         vpxor           $Ij,$T1,$T1
1406          vmovdqu        -0x30($inp),$Ii
1407         vpxor           $Xhi,$Zhi,$Zhi
1408         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1409         vmovdqu         0x30-0x40($Htbl),$Hkey  # $Hkey^3
1410          vpshufb        $bswap,$Ii,$Ij
1411         vpxor           $Xmi,$Zmi,$Zmi
1412         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1413         vmovdqu         0x50-0x40($Htbl),$HK
1414         sub             \$0x10,$len
1415         jz              .Ltail_avx
1416
1417         vpunpckhqdq     $Ij,$Ij,$T1
1418         vpxor           $Xlo,$Zlo,$Zlo
1419         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1420         vpxor           $Ij,$T1,$T1
1421          vmovdqu        -0x40($inp),$Ii
1422         vpxor           $Xhi,$Zhi,$Zhi
1423         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1424         vmovdqu         0x40-0x40($Htbl),$Hkey  # $Hkey^4
1425          vpshufb        $bswap,$Ii,$Ij
1426         vpxor           $Xmi,$Zmi,$Zmi
1427         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1428         vpsrldq         \$8,$HK,$HK
1429         sub             \$0x10,$len
1430         jz              .Ltail_avx
1431
1432         vpunpckhqdq     $Ij,$Ij,$T1
1433         vpxor           $Xlo,$Zlo,$Zlo
1434         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1435         vpxor           $Ij,$T1,$T1
1436          vmovdqu        -0x50($inp),$Ii
1437         vpxor           $Xhi,$Zhi,$Zhi
1438         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1439         vmovdqu         0x60-0x40($Htbl),$Hkey  # $Hkey^5
1440          vpshufb        $bswap,$Ii,$Ij
1441         vpxor           $Xmi,$Zmi,$Zmi
1442         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1443         vmovdqu         0x80-0x40($Htbl),$HK
1444         sub             \$0x10,$len
1445         jz              .Ltail_avx
1446
1447         vpunpckhqdq     $Ij,$Ij,$T1
1448         vpxor           $Xlo,$Zlo,$Zlo
1449         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1450         vpxor           $Ij,$T1,$T1
1451          vmovdqu        -0x60($inp),$Ii
1452         vpxor           $Xhi,$Zhi,$Zhi
1453         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1454         vmovdqu         0x70-0x40($Htbl),$Hkey  # $Hkey^6
1455          vpshufb        $bswap,$Ii,$Ij
1456         vpxor           $Xmi,$Zmi,$Zmi
1457         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1458         vpsrldq         \$8,$HK,$HK
1459         sub             \$0x10,$len
1460         jz              .Ltail_avx
1461
1462         vpunpckhqdq     $Ij,$Ij,$T1
1463         vpxor           $Xlo,$Zlo,$Zlo
1464         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1465         vpxor           $Ij,$T1,$T1
1466          vmovdqu        -0x70($inp),$Ii
1467         vpxor           $Xhi,$Zhi,$Zhi
1468         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1469         vmovdqu         0x90-0x40($Htbl),$Hkey  # $Hkey^7
1470          vpshufb        $bswap,$Ii,$Ij
1471         vpxor           $Xmi,$Zmi,$Zmi
1472         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1473         vmovq           0xb8-0x40($Htbl),$HK
1474         sub             \$0x10,$len
1475         jmp             .Ltail_avx
1476
1477 .align  32
1478 .Ltail_avx:
1479         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1480 .Ltail_no_xor_avx:
1481         vpunpckhqdq     $Ij,$Ij,$T1
1482         vpxor           $Xlo,$Zlo,$Zlo
1483         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1484         vpxor           $Ij,$T1,$T1
1485         vpxor           $Xhi,$Zhi,$Zhi
1486         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1487         vpxor           $Xmi,$Zmi,$Zmi
1488         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1489
1490         vmovdqu         (%r10),$Tred
1491
1492         vpxor           $Xlo,$Zlo,$Xi
1493         vpxor           $Xhi,$Zhi,$Xo
1494         vpxor           $Xmi,$Zmi,$Zmi
1495
1496         vpxor           $Xi, $Zmi,$Zmi          # aggregated Karatsuba post-processing
1497         vpxor           $Xo, $Zmi,$Zmi
1498         vpslldq         \$8, $Zmi,$T2
1499         vpsrldq         \$8, $Zmi,$Zmi
1500         vpxor           $T2, $Xi, $Xi
1501         vpxor           $Zmi,$Xo, $Xo
1502
1503         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 1st phase
1504         vpalignr        \$8,$Xi,$Xi,$Xi
1505         vpxor           $T2,$Xi,$Xi
1506
1507         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 2nd phase
1508         vpalignr        \$8,$Xi,$Xi,$Xi
1509         vpxor           $Xo,$Xi,$Xi
1510         vpxor           $T2,$Xi,$Xi
1511
1512         cmp             \$0,$len
1513         jne             .Lshort_avx
1514
1515         vpshufb         $bswap,$Xi,$Xi
1516         vmovdqu         $Xi,($Xip)
1517         vzeroupper
1518 ___
1519 $code.=<<___ if ($win64);
1520         movaps  (%rsp),%xmm6
1521         movaps  0x10(%rsp),%xmm7
1522         movaps  0x20(%rsp),%xmm8
1523         movaps  0x30(%rsp),%xmm9
1524         movaps  0x40(%rsp),%xmm10
1525         movaps  0x50(%rsp),%xmm11
1526         movaps  0x60(%rsp),%xmm12
1527         movaps  0x70(%rsp),%xmm13
1528         movaps  0x80(%rsp),%xmm14
1529         movaps  0x90(%rsp),%xmm15
1530         lea     0xa8(%rsp),%rsp
1531 .LSEH_end_gcm_ghash_avx:
1532 ___
1533 $code.=<<___;
1534         ret
1535 .size   gcm_ghash_avx,.-gcm_ghash_avx
1536 ___
1537 } else {
1538 $code.=<<___;
1539         jmp     .L_ghash_clmul
1540 .size   gcm_ghash_avx,.-gcm_ghash_avx
1541 ___
1542 }
1543 \f
1544 $code.=<<___;
1545 .align  64
1546 .Lbswap_mask:
1547         .byte   15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
1548 .L0x1c2_polynomial:
1549         .byte   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2
1550 .L7_mask:
1551         .long   7,0,7,0
1552 .L7_mask_poly:
1553         .long   7,0,`0xE1<<1`,0
1554 .align  64
1555 .type   .Lrem_4bit,\@object
1556 .Lrem_4bit:
1557         .long   0,`0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`
1558         .long   0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
1559         .long   0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
1560         .long   0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
1561 .type   .Lrem_8bit,\@object
1562 .Lrem_8bit:
1563         .value  0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
1564         .value  0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
1565         .value  0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
1566         .value  0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
1567         .value  0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
1568         .value  0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
1569         .value  0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
1570         .value  0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
1571         .value  0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
1572         .value  0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
1573         .value  0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
1574         .value  0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
1575         .value  0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
1576         .value  0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
1577         .value  0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
1578         .value  0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
1579         .value  0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
1580         .value  0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
1581         .value  0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
1582         .value  0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
1583         .value  0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
1584         .value  0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
1585         .value  0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
1586         .value  0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
1587         .value  0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
1588         .value  0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
1589         .value  0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
1590         .value  0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
1591         .value  0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
1592         .value  0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
1593         .value  0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
1594         .value  0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
1595
1596 .asciz  "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
1597 .align  64
1598 ___
1599 \f
1600 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
1601 #               CONTEXT *context,DISPATCHER_CONTEXT *disp)
1602 if ($win64) {
1603 $rec="%rcx";
1604 $frame="%rdx";
1605 $context="%r8";
1606 $disp="%r9";
1607
1608 $code.=<<___;
1609 .extern __imp_RtlVirtualUnwind
1610 .type   se_handler,\@abi-omnipotent
1611 .align  16
1612 se_handler:
1613         push    %rsi
1614         push    %rdi
1615         push    %rbx
1616         push    %rbp
1617         push    %r12
1618         push    %r13
1619         push    %r14
1620         push    %r15
1621         pushfq
1622         sub     \$64,%rsp
1623
1624         mov     120($context),%rax      # pull context->Rax
1625         mov     248($context),%rbx      # pull context->Rip
1626
1627         mov     8($disp),%rsi           # disp->ImageBase
1628         mov     56($disp),%r11          # disp->HandlerData
1629
1630         mov     0(%r11),%r10d           # HandlerData[0]
1631         lea     (%rsi,%r10),%r10        # prologue label
1632         cmp     %r10,%rbx               # context->Rip<prologue label
1633         jb      .Lin_prologue
1634
1635         mov     152($context),%rax      # pull context->Rsp
1636
1637         mov     4(%r11),%r10d           # HandlerData[1]
1638         lea     (%rsi,%r10),%r10        # epilogue label
1639         cmp     %r10,%rbx               # context->Rip>=epilogue label
1640         jae     .Lin_prologue
1641
1642         lea     24(%rax),%rax           # adjust "rsp"
1643
1644         mov     -8(%rax),%rbx
1645         mov     -16(%rax),%rbp
1646         mov     -24(%rax),%r12
1647         mov     %rbx,144($context)      # restore context->Rbx
1648         mov     %rbp,160($context)      # restore context->Rbp
1649         mov     %r12,216($context)      # restore context->R12
1650
1651 .Lin_prologue:
1652         mov     8(%rax),%rdi
1653         mov     16(%rax),%rsi
1654         mov     %rax,152($context)      # restore context->Rsp
1655         mov     %rsi,168($context)      # restore context->Rsi
1656         mov     %rdi,176($context)      # restore context->Rdi
1657
1658         mov     40($disp),%rdi          # disp->ContextRecord
1659         mov     $context,%rsi           # context
1660         mov     \$`1232/8`,%ecx         # sizeof(CONTEXT)
1661         .long   0xa548f3fc              # cld; rep movsq
1662
1663         mov     $disp,%rsi
1664         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
1665         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
1666         mov     0(%rsi),%r8             # arg3, disp->ControlPc
1667         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
1668         mov     40(%rsi),%r10           # disp->ContextRecord
1669         lea     56(%rsi),%r11           # &disp->HandlerData
1670         lea     24(%rsi),%r12           # &disp->EstablisherFrame
1671         mov     %r10,32(%rsp)           # arg5
1672         mov     %r11,40(%rsp)           # arg6
1673         mov     %r12,48(%rsp)           # arg7
1674         mov     %rcx,56(%rsp)           # arg8, (NULL)
1675         call    *__imp_RtlVirtualUnwind(%rip)
1676
1677         mov     \$1,%eax                # ExceptionContinueSearch
1678         add     \$64,%rsp
1679         popfq
1680         pop     %r15
1681         pop     %r14
1682         pop     %r13
1683         pop     %r12
1684         pop     %rbp
1685         pop     %rbx
1686         pop     %rdi
1687         pop     %rsi
1688         ret
1689 .size   se_handler,.-se_handler
1690
1691 .section        .pdata
1692 .align  4
1693         .rva    .LSEH_begin_gcm_gmult_4bit
1694         .rva    .LSEH_end_gcm_gmult_4bit
1695         .rva    .LSEH_info_gcm_gmult_4bit
1696
1697         .rva    .LSEH_begin_gcm_ghash_4bit
1698         .rva    .LSEH_end_gcm_ghash_4bit
1699         .rva    .LSEH_info_gcm_ghash_4bit
1700
1701         .rva    .LSEH_begin_gcm_init_clmul
1702         .rva    .LSEH_end_gcm_init_clmul
1703         .rva    .LSEH_info_gcm_init_clmul
1704
1705         .rva    .LSEH_begin_gcm_ghash_clmul
1706         .rva    .LSEH_end_gcm_ghash_clmul
1707         .rva    .LSEH_info_gcm_ghash_clmul
1708 ___
1709 $code.=<<___    if ($avx);
1710         .rva    .LSEH_begin_gcm_init_avx
1711         .rva    .LSEH_end_gcm_init_avx
1712         .rva    .LSEH_info_gcm_init_clmul
1713
1714         .rva    .LSEH_begin_gcm_ghash_avx
1715         .rva    .LSEH_end_gcm_ghash_avx
1716         .rva    .LSEH_info_gcm_ghash_clmul
1717 ___
1718 $code.=<<___;
1719 .section        .xdata
1720 .align  8
1721 .LSEH_info_gcm_gmult_4bit:
1722         .byte   9,0,0,0
1723         .rva    se_handler
1724         .rva    .Lgmult_prologue,.Lgmult_epilogue       # HandlerData
1725 .LSEH_info_gcm_ghash_4bit:
1726         .byte   9,0,0,0
1727         .rva    se_handler
1728         .rva    .Lghash_prologue,.Lghash_epilogue       # HandlerData
1729 .LSEH_info_gcm_init_clmul:
1730         .byte   0x01,0x08,0x03,0x00
1731         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1732         .byte   0x04,0x22,0x00,0x00     #sub    rsp,0x18
1733 .LSEH_info_gcm_ghash_clmul:
1734         .byte   0x01,0x33,0x16,0x00
1735         .byte   0x33,0xf8,0x09,0x00     #movaps 0x90(rsp),xmm15
1736         .byte   0x2e,0xe8,0x08,0x00     #movaps 0x80(rsp),xmm14
1737         .byte   0x29,0xd8,0x07,0x00     #movaps 0x70(rsp),xmm13
1738         .byte   0x24,0xc8,0x06,0x00     #movaps 0x60(rsp),xmm12
1739         .byte   0x1f,0xb8,0x05,0x00     #movaps 0x50(rsp),xmm11
1740         .byte   0x1a,0xa8,0x04,0x00     #movaps 0x40(rsp),xmm10
1741         .byte   0x15,0x98,0x03,0x00     #movaps 0x30(rsp),xmm9
1742         .byte   0x10,0x88,0x02,0x00     #movaps 0x20(rsp),xmm8
1743         .byte   0x0c,0x78,0x01,0x00     #movaps 0x10(rsp),xmm7
1744         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1745         .byte   0x04,0x01,0x15,0x00     #sub    rsp,0xa8
1746 ___
1747 }
1748 \f
1749 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
1750
1751 print $code;
1752
1753 close STDOUT;