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      1.76(+14%)
  63 # Sandy Bridge  1.79(+9%)
  64 # Ivy Bridge    1.79(+8%)
  65 # Haswell       0.55(+93%) (if system doesn't support AVX)
  66 # Bulldozer     1.52(+25%)
  67
  68 # March 2013
  69 #
  70 # ... 8x aggregate factor AVX code path is using reduction algorithm
  71 # suggested by Shay Gueron[1]. Even though contemporary AVX-capable
  72 # CPUs such as Sandy and Ivy Bridge can execute it, the code performs
  73 # sub-optimally in comparison to above mentioned version. But thanks
  74 # to Ilya Albrekht and Max Locktyukhin of Intel Corp. we knew that
  75 # it performs in 0.41 cycles per byte on Haswell processor.
  76 #
  77 # [1] http://rt.openssl.org/Ticket/Display.html?id=2900&user=guest&pass=guest
  78
  79 $flavour = shift;
  80 $output  = shift;
  81 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
  82
  83 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  84
  85 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  86 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  87 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
  88 die "can't locate x86_64-xlate.pl";
  89
  90 if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
  91                 =~ /GNU assembler version ([2-9]\.[0-9]+)/) {
  92         $avx = ($1>=2.19) + ($1>=2.22);
  93 }
  94
  95 if (!$avx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
  96             `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
  97         $avx = ($1>=2.09) + ($1>=2.10);
  98 }
  99
 100 if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
 101             `ml64 2>&1` =~ /Version ([0-9]+)\./) {
 102         $avx = ($1>=10) + ($1>=11);
 103 }
 104
 105 open OUT,"| \"$^X\" $xlate $flavour $output";
 106 *STDOUT=*OUT;
 107
 108 $do4xaggr=1;
 109
 110 # common register layout
 111 $nlo="%rax";
 112 $nhi="%rbx";
 113 $Zlo="%r8";
 114 $Zhi="%r9";
 115 $tmp="%r10";
 116 $rem_4bit = "%r11";
 117
 118 $Xi="%rdi";
 119 $Htbl="%rsi";
 120
 121 # per-function register layout
 122 $cnt="%rcx";
 123 $rem="%rdx";
 124
 125 sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/     or
 126                         $r =~ s/%[er]([sd]i)/%\1l/      or
 127                         $r =~ s/%[er](bp)/%\1l/         or
 128                         $r =~ s/%(r[0-9]+)[d]?/%\1b/;   $r; }
 129
 130 sub AUTOLOAD()          # thunk [simplified] 32-bit style perlasm
 131 { my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
 132   my $arg = pop;
 133     $arg = "\$$arg" if ($arg*1 eq $arg);
 134     $code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
 135 }
 136 \f
 137 { my $N;
 138   sub loop() {
 139   my $inp = shift;
 140
 141         $N++;
 142 $code.=<<___;
 143         xor     $nlo,$nlo
 144         xor     $nhi,$nhi
 145         mov     `&LB("$Zlo")`,`&LB("$nlo")`
 146         mov     `&LB("$Zlo")`,`&LB("$nhi")`
 147         shl     \$4,`&LB("$nlo")`
 148         mov     \$14,$cnt
 149         mov     8($Htbl,$nlo),$Zlo
 150         mov     ($Htbl,$nlo),$Zhi
 151         and     \$0xf0,`&LB("$nhi")`
 152         mov     $Zlo,$rem
 153         jmp     .Loop$N
 154
 155 .align  16
 156 .Loop$N:
 157         shr     \$4,$Zlo
 158         and     \$0xf,$rem
 159         mov     $Zhi,$tmp
 160         mov     ($inp,$cnt),`&LB("$nlo")`
 161         shr     \$4,$Zhi
 162         xor     8($Htbl,$nhi),$Zlo
 163         shl     \$60,$tmp
 164         xor     ($Htbl,$nhi),$Zhi
 165         mov     `&LB("$nlo")`,`&LB("$nhi")`
 166         xor     ($rem_4bit,$rem,8),$Zhi
 167         mov     $Zlo,$rem
 168         shl     \$4,`&LB("$nlo")`
 169         xor     $tmp,$Zlo
 170         dec     $cnt
 171         js      .Lbreak$N
 172
 173         shr     \$4,$Zlo
 174         and     \$0xf,$rem
 175         mov     $Zhi,$tmp
 176         shr     \$4,$Zhi
 177         xor     8($Htbl,$nlo),$Zlo
 178         shl     \$60,$tmp
 179         xor     ($Htbl,$nlo),$Zhi
 180         and     \$0xf0,`&LB("$nhi")`
 181         xor     ($rem_4bit,$rem,8),$Zhi
 182         mov     $Zlo,$rem
 183         xor     $tmp,$Zlo
 184         jmp     .Loop$N
 185
 186 .align  16
 187 .Lbreak$N:
 188         shr     \$4,$Zlo
 189         and     \$0xf,$rem
 190         mov     $Zhi,$tmp
 191         shr     \$4,$Zhi
 192         xor     8($Htbl,$nlo),$Zlo
 193         shl     \$60,$tmp
 194         xor     ($Htbl,$nlo),$Zhi
 195         and     \$0xf0,`&LB("$nhi")`
 196         xor     ($rem_4bit,$rem,8),$Zhi
 197         mov     $Zlo,$rem
 198         xor     $tmp,$Zlo
 199
 200         shr     \$4,$Zlo
 201         and     \$0xf,$rem
 202         mov     $Zhi,$tmp
 203         shr     \$4,$Zhi
 204         xor     8($Htbl,$nhi),$Zlo
 205         shl     \$60,$tmp
 206         xor     ($Htbl,$nhi),$Zhi
 207         xor     $tmp,$Zlo
 208         xor     ($rem_4bit,$rem,8),$Zhi
 209
 210         bswap   $Zlo
 211         bswap   $Zhi
 212 ___
 213 }}
 214
 215 $code=<<___;
 216 .text
 217 .extern OPENSSL_ia32cap_P
 218
 219 .globl  gcm_gmult_4bit
 220 .type   gcm_gmult_4bit,\@function,2
 221 .align  16
 222 gcm_gmult_4bit:
 223         push    %rbx
 224         push    %rbp            # %rbp and %r12 are pushed exclusively in
 225         push    %r12            # order to reuse Win64 exception handler...
 226 .Lgmult_prologue:
 227
 228         movzb   15($Xi),$Zlo
 229         lea     .Lrem_4bit(%rip),$rem_4bit
 230 ___
 231         &loop   ($Xi);
 232 $code.=<<___;
 233         mov     $Zlo,8($Xi)
 234         mov     $Zhi,($Xi)
 235
 236         mov     16(%rsp),%rbx
 237         lea     24(%rsp),%rsp
 238 .Lgmult_epilogue:
 239         ret
 240 .size   gcm_gmult_4bit,.-gcm_gmult_4bit
 241 ___
 242 \f
 243 # per-function register layout
 244 $inp="%rdx";
 245 $len="%rcx";
 246 $rem_8bit=$rem_4bit;
 247
 248 $code.=<<___;
 249 .globl  gcm_ghash_4bit
 250 .type   gcm_ghash_4bit,\@function,4
 251 .align  16
 252 gcm_ghash_4bit:
 253         push    %rbx
 254         push    %rbp
 255         push    %r12
 256         push    %r13
 257         push    %r14
 258         push    %r15
 259         sub     \$280,%rsp
 260 .Lghash_prologue:
 261         mov     $inp,%r14               # reassign couple of args
 262         mov     $len,%r15
 263 ___
 264 { my $inp="%r14";
 265   my $dat="%edx";
 266   my $len="%r15";
 267   my @nhi=("%ebx","%ecx");
 268   my @rem=("%r12","%r13");
 269   my $Hshr4="%rbp";
 270
 271         &sub    ($Htbl,-128);           # size optimization
 272         &lea    ($Hshr4,"16+128(%rsp)");
 273         { my @lo =($nlo,$nhi);
 274           my @hi =($Zlo,$Zhi);
 275
 276           &xor  ($dat,$dat);
 277           for ($i=0,$j=-2;$i<18;$i++,$j++) {
 278             &mov        ("$j(%rsp)",&LB($dat))          if ($i>1);
 279             &or         ($lo[0],$tmp)                   if ($i>1);
 280             &mov        (&LB($dat),&LB($lo[1]))         if ($i>0 && $i<17);
 281             &shr        ($lo[1],4)                      if ($i>0 && $i<17);
 282             &mov        ($tmp,$hi[1])                   if ($i>0 && $i<17);
 283             &shr        ($hi[1],4)                      if ($i>0 && $i<17);
 284             &mov        ("8*$j($Hshr4)",$hi[0])         if ($i>1);
 285             &mov        ($hi[0],"16*$i+0-128($Htbl)")   if ($i<16);
 286             &shl        (&LB($dat),4)                   if ($i>0 && $i<17);
 287             &mov        ("8*$j-128($Hshr4)",$lo[0])     if ($i>1);
 288             &mov        ($lo[0],"16*$i+8-128($Htbl)")   if ($i<16);
 289             &shl        ($tmp,60)                       if ($i>0 && $i<17);
 290
 291             push        (@lo,shift(@lo));
 292             push        (@hi,shift(@hi));
 293           }
 294         }
 295         &add    ($Htbl,-128);
 296         &mov    ($Zlo,"8($Xi)");
 297         &mov    ($Zhi,"0($Xi)");
 298         &add    ($len,$inp);            # pointer to the end of data
 299         &lea    ($rem_8bit,".Lrem_8bit(%rip)");
 300         &jmp    (".Louter_loop");
 301
 302 $code.=".align  16\n.Louter_loop:\n";
 303         &xor    ($Zhi,"($inp)");
 304         &mov    ("%rdx","8($inp)");
 305         &lea    ($inp,"16($inp)");
 306         &xor    ("%rdx",$Zlo);
 307         &mov    ("($Xi)",$Zhi);
 308         &mov    ("8($Xi)","%rdx");
 309         &shr    ("%rdx",32);
 310
 311         &xor    ($nlo,$nlo);
 312         &rol    ($dat,8);
 313         &mov    (&LB($nlo),&LB($dat));
 314         &movz   ($nhi[0],&LB($dat));
 315         &shl    (&LB($nlo),4);
 316         &shr    ($nhi[0],4);
 317
 318         for ($j=11,$i=0;$i<15;$i++) {
 319             &rol        ($dat,8);
 320             &xor        ($Zlo,"8($Htbl,$nlo)")                  if ($i>0);
 321             &xor        ($Zhi,"($Htbl,$nlo)")                   if ($i>0);
 322             &mov        ($Zlo,"8($Htbl,$nlo)")                  if ($i==0);
 323             &mov        ($Zhi,"($Htbl,$nlo)")                   if ($i==0);
 324
 325             &mov        (&LB($nlo),&LB($dat));
 326             &xor        ($Zlo,$tmp)                             if ($i>0);
 327             &movzw      ($rem[1],"($rem_8bit,$rem[1],2)")       if ($i>0);
 328
 329             &movz       ($nhi[1],&LB($dat));
 330             &shl        (&LB($nlo),4);
 331             &movzb      ($rem[0],"(%rsp,$nhi[0])");
 332
 333             &shr        ($nhi[1],4)                             if ($i<14);
 334             &and        ($nhi[1],0xf0)                          if ($i==14);
 335             &shl        ($rem[1],48)                            if ($i>0);
 336             &xor        ($rem[0],$Zlo);
 337
 338             &mov        ($tmp,$Zhi);
 339             &xor        ($Zhi,$rem[1])                          if ($i>0);
 340             &shr        ($Zlo,8);
 341
 342             &movz       ($rem[0],&LB($rem[0]));
 343             &mov        ($dat,"$j($Xi)")                        if (--$j%4==0);
 344             &shr        ($Zhi,8);
 345
 346             &xor        ($Zlo,"-128($Hshr4,$nhi[0],8)");
 347             &shl        ($tmp,56);
 348             &xor        ($Zhi,"($Hshr4,$nhi[0],8)");
 349
 350             unshift     (@nhi,pop(@nhi));               # "rotate" registers
 351             unshift     (@rem,pop(@rem));
 352         }
 353         &movzw  ($rem[1],"($rem_8bit,$rem[1],2)");
 354         &xor    ($Zlo,"8($Htbl,$nlo)");
 355         &xor    ($Zhi,"($Htbl,$nlo)");
 356
 357         &shl    ($rem[1],48);
 358         &xor    ($Zlo,$tmp);
 359
 360         &xor    ($Zhi,$rem[1]);
 361         &movz   ($rem[0],&LB($Zlo));
 362         &shr    ($Zlo,4);
 363
 364         &mov    ($tmp,$Zhi);
 365         &shl    (&LB($rem[0]),4);
 366         &shr    ($Zhi,4);
 367
 368         &xor    ($Zlo,"8($Htbl,$nhi[0])");
 369         &movzw  ($rem[0],"($rem_8bit,$rem[0],2)");
 370         &shl    ($tmp,60);
 371
 372         &xor    ($Zhi,"($Htbl,$nhi[0])");
 373         &xor    ($Zlo,$tmp);
 374         &shl    ($rem[0],48);
 375
 376         &bswap  ($Zlo);
 377         &xor    ($Zhi,$rem[0]);
 378
 379         &bswap  ($Zhi);
 380         &cmp    ($inp,$len);
 381         &jb     (".Louter_loop");
 382 }
 383 $code.=<<___;
 384         mov     $Zlo,8($Xi)
 385         mov     $Zhi,($Xi)
 386
 387         lea     280(%rsp),%rsi
 388         mov     0(%rsi),%r15
 389         mov     8(%rsi),%r14
 390         mov     16(%rsi),%r13
 391         mov     24(%rsi),%r12
 392         mov     32(%rsi),%rbp
 393         mov     40(%rsi),%rbx
 394         lea     48(%rsi),%rsp
 395 .Lghash_epilogue:
 396         ret
 397 .size   gcm_ghash_4bit,.-gcm_ghash_4bit
 398 ___
 399 \f
 400 ######################################################################
 401 # PCLMULQDQ version.
 402
 403 @_4args=$win64? ("%rcx","%rdx","%r8", "%r9") :  # Win64 order
 404                 ("%rdi","%rsi","%rdx","%rcx");  # Unix order
 405
 406 ($Xi,$Xhi)=("%xmm0","%xmm1");   $Hkey="%xmm2";
 407 ($T1,$T2,$T3)=("%xmm3","%xmm4","%xmm5");
 408
 409 sub clmul64x64_T2 {     # minimal register pressure
 410 my ($Xhi,$Xi,$Hkey,$HK)=@_;
 411
 412 if (!defined($HK)) {    $HK = $T2;
 413 $code.=<<___;
 414         movdqa          $Xi,$Xhi                #
 415         pshufd          \$0b01001110,$Xi,$T1
 416         pshufd          \$0b01001110,$Hkey,$T2
 417         pxor            $Xi,$T1                 #
 418         pxor            $Hkey,$T2
 419 ___
 420 } else {
 421 $code.=<<___;
 422         movdqa          $Xi,$Xhi                #
 423         pshufd          \$0b01001110,$Xi,$T1
 424         pxor            $Xi,$T1                 #
 425 ___
 426 }
 427 $code.=<<___;
 428         pclmulqdq       \$0x00,$Hkey,$Xi        #######
 429         pclmulqdq       \$0x11,$Hkey,$Xhi       #######
 430         pclmulqdq       \$0x00,$HK,$T1          #######
 431         pxor            $Xi,$T1                 #
 432         pxor            $Xhi,$T1                #
 433
 434         movdqa          $T1,$T2                 #
 435         psrldq          \$8,$T1
 436         pslldq          \$8,$T2                 #
 437         pxor            $T1,$Xhi
 438         pxor            $T2,$Xi                 #
 439 ___
 440 }
 441
 442 sub reduction_alg9 {    # 17/11 times faster than Intel version
 443 my ($Xhi,$Xi) = @_;
 444
 445 $code.=<<___;
 446         # 1st phase
 447         movdqa          $Xi,$T2                 #
 448         movdqa          $Xi,$T1
 449         psllq           \$5,$Xi
 450         pxor            $Xi,$T1                 #
 451         psllq           \$1,$Xi
 452         pxor            $T1,$Xi                 #
 453         psllq           \$57,$Xi                #
 454         movdqa          $Xi,$T1                 #
 455         pslldq          \$8,$Xi
 456         psrldq          \$8,$T1                 #
 457         pxor            $T2,$Xi
 458         pxor            $T1,$Xhi                #
 459
 460         # 2nd phase
 461         movdqa          $Xi,$T2
 462         psrlq           \$1,$Xi
 463         pxor            $T2,$Xhi                #
 464         pxor            $Xi,$T2
 465         psrlq           \$5,$Xi
 466         pxor            $T2,$Xi                 #
 467         psrlq           \$1,$Xi                 #
 468         pxor            $Xhi,$Xi                #
 469 ___
 470 }
 471 \f
 472 { my ($Htbl,$Xip)=@_4args;
 473   my $HK="%xmm6";
 474
 475 $code.=<<___;
 476 .globl  gcm_init_clmul
 477 .type   gcm_init_clmul,\@abi-omnipotent
 478 .align  16
 479 gcm_init_clmul:
 480 .L_init_clmul:
 481 ___
 482 $code.=<<___ if ($win64);
 483 .LSEH_begin_gcm_init_clmul:
 484         # I can't trust assembler to use specific encoding:-(
 485         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
 486         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
 487 ___
 488 $code.=<<___;
 489         movdqu          ($Xip),$Hkey
 490         pshufd          \$0b01001110,$Hkey,$Hkey        # dword swap
 491
 492         # <<1 twist
 493         pshufd          \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
 494         movdqa          $Hkey,$T1
 495         psllq           \$1,$Hkey
 496         pxor            $T3,$T3                 #
 497         psrlq           \$63,$T1
 498         pcmpgtd         $T2,$T3                 # broadcast carry bit
 499         pslldq          \$8,$T1
 500         por             $T1,$Hkey               # H<<=1
 501
 502         # magic reduction
 503         pand            .L0x1c2_polynomial(%rip),$T3
 504         pxor            $T3,$Hkey               # if(carry) H^=0x1c2_polynomial
 505
 506         # calculate H^2
 507         pshufd          \$0b01001110,$Hkey,$HK
 508         movdqa          $Hkey,$Xi
 509         pxor            $Hkey,$HK
 510 ___
 511         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);
 512         &reduction_alg9 ($Xhi,$Xi);
 513 $code.=<<___;
 514         pshufd          \$0b01001110,$Hkey,$T1
 515         pshufd          \$0b01001110,$Xi,$T2
 516         pxor            $Hkey,$T1               # Karatsuba pre-processing
 517         movdqu          $Hkey,0x00($Htbl)       # save H
 518         pxor            $Xi,$T2                 # Karatsuba pre-processing
 519         movdqu          $Xi,0x10($Htbl)         # save H^2
 520         palignr         \$8,$T1,$T2             # low part is H.lo^H.hi...
 521         movdqu          $T2,0x20($Htbl)         # save Karatsuba "salt"
 522 ___
 523 if ($do4xaggr) {
 524         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^3
 525         &reduction_alg9 ($Xhi,$Xi);
 526 $code.=<<___;
 527         movdqa          $Xi,$T3
 528 ___
 529         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H^4
 530         &reduction_alg9 ($Xhi,$Xi);
 531 $code.=<<___;
 532         pshufd          \$0b01001110,$T3,$T1
 533         pshufd          \$0b01001110,$Xi,$T2
 534         pxor            $T3,$T1                 # Karatsuba pre-processing
 535         movdqu          $T3,0x30($Htbl)         # save H^3
 536         pxor            $Xi,$T2                 # Karatsuba pre-processing
 537         movdqu          $Xi,0x40($Htbl)         # save H^4
 538         palignr         \$8,$T1,$T2             # low part is H^3.lo^H^3.hi...
 539         movdqu          $T2,0x50($Htbl)         # save Karatsuba "salt"
 540 ___
 541 }
 542 $code.=<<___ if ($win64);
 543         movaps  (%rsp),%xmm6
 544         lea     0x18(%rsp),%rsp
 545 .LSEH_end_gcm_init_clmul:
 546 ___
 547 $code.=<<___;
 548         ret
 549 .size   gcm_init_clmul,.-gcm_init_clmul
 550 ___
 551 }
 552
 553 { my ($Xip,$Htbl)=@_4args;
 554
 555 $code.=<<___;
 556 .globl  gcm_gmult_clmul
 557 .type   gcm_gmult_clmul,\@abi-omnipotent
 558 .align  16
 559 gcm_gmult_clmul:
 560 .L_gmult_clmul:
 561         movdqu          ($Xip),$Xi
 562         movdqa          .Lbswap_mask(%rip),$T3
 563         movdqu          ($Htbl),$Hkey
 564         movdqu          0x20($Htbl),$T2
 565         pshufb          $T3,$Xi
 566 ___
 567         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$T2);
 568 $code.=<<___ if (0 || (&reduction_alg9($Xhi,$Xi)&&0));
 569         # experimental alternative. special thing about is that there
 570         # no dependency between the two multiplications...
 571         mov             \$`0xE1<<1`,%eax
 572         mov             \$0xA040608020C0E000,%r10       # ((7..0)·0xE0)&0xff
 573         mov             \$0x07,%r11d
 574         movq            %rax,$T1
 575         movq            %r10,$T2
 576         movq            %r11,$T3                # borrow $T3
 577         pand            $Xi,$T3
 578         pshufb          $T3,$T2                 # ($Xi&7)·0xE0
 579         movq            %rax,$T3
 580         pclmulqdq       \$0x00,$Xi,$T1          # ·(0xE1<<1)
 581         pxor            $Xi,$T2
 582         pslldq          \$15,$T2
 583         paddd           $T2,$T2                 # <<(64+56+1)
 584         pxor            $T2,$Xi
 585         pclmulqdq       \$0x01,$T3,$Xi
 586         movdqa          .Lbswap_mask(%rip),$T3  # reload $T3
 587         psrldq          \$1,$T1
 588         pxor            $T1,$Xhi
 589         pslldq          \$7,$Xi
 590         pxor            $Xhi,$Xi
 591 ___
 592 $code.=<<___;
 593         pshufb          $T3,$Xi
 594         movdqu          $Xi,($Xip)
 595         ret
 596 .size   gcm_gmult_clmul,.-gcm_gmult_clmul
 597 ___
 598 }
 599 \f
 600 { my ($Xip,$Htbl,$inp,$len)=@_4args;
 601   my ($Xln,$Xmn,$Xhn,$Hkey2,$HK) = map("%xmm$_",(3..7));
 602   my ($T1,$T2,$T3)=map("%xmm$_",(8..10));
 603
 604 $code.=<<___;
 605 .globl  gcm_ghash_clmul
 606 .type   gcm_ghash_clmul,\@abi-omnipotent
 607 .align  32
 608 gcm_ghash_clmul:
 609 .L_ghash_clmul:
 610 ___
 611 $code.=<<___ if ($win64);
 612         lea     -0x88(%rsp),%rax
 613 .LSEH_begin_gcm_ghash_clmul:
 614         # I can't trust assembler to use specific encoding:-(
 615         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
 616         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
 617         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
 618         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
 619         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
 620         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
 621         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
 622         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
 623         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
 624         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
 625         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
 626 ___
 627 $code.=<<___;
 628         movdqa          .Lbswap_mask(%rip),$T3
 629
 630         movdqu          ($Xip),$Xi
 631         movdqu          ($Htbl),$Hkey
 632         movdqu          0x20($Htbl),$HK
 633         pshufb          $T3,$Xi
 634
 635         sub             \$0x10,$len
 636         jz              .Lodd_tail
 637
 638         movdqu          0x10($Htbl),$Hkey2
 639 ___
 640 if ($do4xaggr) {
 641 my ($Xl,$Xm,$Xh,$Hkey3,$Hkey4)=map("%xmm$_",(11..15));
 642
 643 $code.=<<___;
 644         mov             OPENSSL_ia32cap_P+4(%rip),%eax
 645         cmp             \$0x30,$len
 646         jb              .Lskip4x
 647
 648         and             \$`1<<26|1<<22`,%eax    # isolate MOVBE+XSAVE
 649         cmp             \$`1<<22`,%eax          # check for MOVBE without XSAVE
 650         je              .Lskip4x
 651
 652         sub             \$0x30,$len
 653         mov             \$0xA040608020C0E000,%rax       # ((7..0)·0xE0)&0xff
 654         movdqu          0x30($Htbl),$Hkey3
 655         movdqu          0x40($Htbl),$Hkey4
 656
 657         #######
 658         # Xi+4 =[(H*Ii+3) + (H^2*Ii+2) + (H^3*Ii+1) + H^4*(Ii+Xi)] mod P
 659         #
 660         movdqu          0x30($inp),$Xln
 661          movdqu         0x20($inp),$Xl
 662         pshufb          $T3,$Xln
 663          pshufb         $T3,$Xl
 664         movdqa          $Xln,$Xhn
 665         pshufd          \$0b01001110,$Xln,$Xmn
 666         pxor            $Xln,$Xmn
 667         pclmulqdq       \$0x00,$Hkey,$Xln
 668         pclmulqdq       \$0x11,$Hkey,$Xhn
 669         pclmulqdq       \$0x00,$HK,$Xmn
 670
 671         movdqa          $Xl,$Xh
 672         pshufd          \$0b01001110,$Xl,$Xm
 673         pxor            $Xl,$Xm
 674         pclmulqdq       \$0x00,$Hkey2,$Xl
 675         pclmulqdq       \$0x11,$Hkey2,$Xh
 676         xorps           $Xl,$Xln
 677         pclmulqdq       \$0x10,$HK,$Xm
 678         xorps           $Xh,$Xhn
 679         movups          0x50($Htbl),$HK
 680         xorps           $Xm,$Xmn
 681
 682         movdqu          0x10($inp),$Xl
 683          movdqu         0($inp),$T1
 684         pshufb          $T3,$Xl
 685          pshufb         $T3,$T1
 686         movdqa          $Xl,$Xh
 687         pshufd          \$0b01001110,$Xl,$Xm
 688          pxor           $T1,$Xi
 689         pxor            $Xl,$Xm
 690         pclmulqdq       \$0x00,$Hkey3,$Xl
 691          movdqa         $Xi,$Xhi
 692          pshufd         \$0b01001110,$Xi,$T1
 693          pxor           $Xi,$T1
 694         pclmulqdq       \$0x11,$Hkey3,$Xh
 695         xorps           $Xl,$Xln
 696         pclmulqdq       \$0x00,$HK,$Xm
 697         xorps           $Xh,$Xhn
 698
 699         lea     0x40($inp),$inp
 700         sub     \$0x40,$len
 701         jc      .Ltail4x
 702
 703         jmp     .Lmod4_loop
 704 .align  32
 705 .Lmod4_loop:
 706         pclmulqdq       \$0x00,$Hkey4,$Xi
 707         xorps           $Xm,$Xmn
 708          movdqu         0x30($inp),$Xl
 709          pshufb         $T3,$Xl
 710         pclmulqdq       \$0x11,$Hkey4,$Xhi
 711         xorps           $Xln,$Xi
 712          movdqu         0x20($inp),$Xln
 713          movdqa         $Xl,$Xh
 714          pshufd         \$0b01001110,$Xl,$Xm
 715         pclmulqdq       \$0x10,$HK,$T1
 716         xorps           $Xhn,$Xhi
 717          pxor           $Xl,$Xm
 718          pshufb         $T3,$Xln
 719         movups          0x20($Htbl),$HK
 720          pclmulqdq      \$0x00,$Hkey,$Xl
 721         xorps           $Xmn,$T1
 722          movdqa         $Xln,$Xhn
 723          pshufd         \$0b01001110,$Xln,$Xmn
 724
 725         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 726          pxor           $Xln,$Xmn
 727         pxor            $Xhi,$T1                #
 728         movdqa          $T1,$T2                 #
 729         pslldq          \$8,$T1
 730          pclmulqdq      \$0x11,$Hkey,$Xh
 731         psrldq          \$8,$T2                 #
 732         pxor            $T1,$Xi
 733         movdqa          .L7_mask(%rip),$T1
 734         pxor            $T2,$Xhi                #
 735         movq            %rax,$T2
 736
 737         pand            $Xi,$T1                 # 1st phase
 738         pshufb          $T1,$T2                 #
 739          pclmulqdq      \$0x00,$HK,$Xm
 740         pxor            $Xi,$T2                 #
 741         psllq           \$57,$T2                #
 742         movdqa          $T2,$T1                 #
 743         pslldq          \$8,$T2
 744          pclmulqdq      \$0x00,$Hkey2,$Xln
 745         psrldq          \$8,$T1                 #
 746         pxor            $T2,$Xi
 747         pxor            $T1,$Xhi                #
 748         movdqu          0($inp),$T1
 749
 750         movdqa          $Xi,$T2                 # 2nd phase
 751         psrlq           \$1,$Xi
 752          pclmulqdq      \$0x11,$Hkey2,$Xhn
 753          xorps          $Xl,$Xln
 754          movdqu         0x10($inp),$Xl
 755          pshufb         $T3,$Xl
 756          pclmulqdq      \$0x10,$HK,$Xmn
 757          xorps          $Xh,$Xhn
 758          movups         0x50($Htbl),$HK
 759         pshufb          $T3,$T1
 760         pxor            $T2,$Xhi                #
 761         pxor            $Xi,$T2
 762         psrlq           \$5,$Xi
 763
 764          movdqa         $Xl,$Xh
 765          pxor           $Xm,$Xmn
 766          pshufd         \$0b01001110,$Xl,$Xm
 767          pxor           $Xl,$Xm
 768          pclmulqdq      \$0x00,$Hkey3,$Xl
 769         pxor            $T2,$Xi                 #
 770         pxor            $T1,$Xhi
 771         psrlq           \$1,$Xi                 #
 772          pclmulqdq      \$0x11,$Hkey3,$Xh
 773          xorps          $Xl,$Xln
 774         pxor            $Xhi,$Xi                #
 775
 776          pclmulqdq      \$0x00,$HK,$Xm
 777          xorps          $Xh,$Xhn
 778
 779         movdqa          $Xi,$Xhi
 780         pshufd          \$0b01001110,$Xi,$T1
 781         pxor            $Xi,$T1
 782
 783         lea     0x40($inp),$inp
 784         sub     \$0x40,$len
 785         jnc     .Lmod4_loop
 786
 787 .Ltail4x:
 788         pclmulqdq       \$0x00,$Hkey4,$Xi
 789         xorps           $Xm,$Xmn
 790         pclmulqdq       \$0x11,$Hkey4,$Xhi
 791         xorps           $Xln,$Xi
 792         pclmulqdq       \$0x10,$HK,$T1
 793         xorps           $Xhn,$Xhi
 794         pxor            $Xi,$Xhi                # aggregated Karatsuba post-processing
 795         pxor            $Xmn,$T1
 796
 797         pxor            $Xhi,$T1                #
 798         pxor            $Xi,$Xhi
 799
 800         movdqa          $T1,$T2                 #
 801         psrldq          \$8,$T1
 802         pslldq          \$8,$T2                 #
 803         pxor            $T1,$Xhi
 804         pxor            $T2,$Xi                 #
 805 ___
 806         &reduction_alg9($Xhi,$Xi);
 807 $code.=<<___;
 808         add     \$0x40,$len
 809         jz      .Ldone
 810         movdqu  0x20($Htbl),$HK
 811         sub     \$0x10,$len
 812         jz      .Lodd_tail
 813 .Lskip4x:
 814 ___
 815 }
 816 $code.=<<___;
 817         #######
 818         # Xi+2 =[H*(Ii+1 + Xi+1)] mod P =
 819         #       [(H*Ii+1) + (H*Xi+1)] mod P =
 820         #       [(H*Ii+1) + H^2*(Ii+Xi)] mod P
 821         #
 822         movdqu          ($inp),$T1              # Ii
 823         movdqu          16($inp),$Xln           # Ii+1
 824         pshufb          $T3,$T1
 825         pshufb          $T3,$Xln
 826         pxor            $T1,$Xi                 # Ii+Xi
 827
 828         movdqa          $Xln,$Xhn
 829         pshufd          \$0b01001110,$Xln,$Xmn
 830         pxor            $Xln,$Xmn
 831         pclmulqdq       \$0x00,$Hkey,$Xln
 832         pclmulqdq       \$0x11,$Hkey,$Xhn
 833         pclmulqdq       \$0x00,$HK,$Xmn
 834
 835         lea             32($inp),$inp           # i+=2
 836         nop
 837         sub             \$0x20,$len
 838         jbe             .Leven_tail
 839         nop
 840         jmp             .Lmod_loop
 841
 842 .align  32
 843 .Lmod_loop:
 844         movdqa          $Xi,$Xhi
 845         movdqa          $Xmn,$T1
 846         pshufd          \$0b01001110,$Xi,$Xmn   #
 847         pxor            $Xi,$Xmn                #
 848
 849         pclmulqdq       \$0x00,$Hkey2,$Xi
 850         pclmulqdq       \$0x11,$Hkey2,$Xhi
 851         pclmulqdq       \$0x10,$HK,$Xmn
 852
 853         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 854         pxor            $Xhn,$Xhi
 855           movdqu        ($inp),$Xhn             # Ii
 856         pxor            $Xi,$T1                 # aggregated Karatsuba post-processing
 857           pshufb        $T3,$Xhn
 858           movdqu        16($inp),$Xln           # Ii+1
 859
 860         pxor            $Xhi,$T1
 861           pxor          $Xhn,$Xhi               # "Ii+Xi", consume early
 862         pxor            $T1,$Xmn
 863          pshufb         $T3,$Xln
 864         movdqa          $Xmn,$T1                #
 865         psrldq          \$8,$T1
 866         pslldq          \$8,$Xmn                #
 867         pxor            $T1,$Xhi
 868         pxor            $Xmn,$Xi                #
 869
 870         movdqa          $Xln,$Xhn               #
 871
 872           movdqa        $Xi,$T2                 # 1st phase
 873           movdqa        $Xi,$T1
 874           psllq         \$5,$Xi
 875           pxor          $Xi,$T1                 #
 876         pclmulqdq       \$0x00,$Hkey,$Xln       #######
 877           psllq         \$1,$Xi
 878           pxor          $T1,$Xi                 #
 879           psllq         \$57,$Xi                #
 880           movdqa        $Xi,$T1                 #
 881           pslldq        \$8,$Xi
 882           psrldq        \$8,$T1                 #
 883           pxor          $T2,$Xi
 884         pshufd          \$0b01001110,$Xhn,$Xmn
 885           pxor          $T1,$Xhi                #
 886         pxor            $Xhn,$Xmn               #
 887
 888         pclmulqdq       \$0x11,$Hkey,$Xhn       #######
 889           movdqa        $Xi,$T2                 # 2nd phase
 890           psrlq         \$1,$Xi
 891           pxor          $T2,$Xhi                #
 892           pxor          $Xi,$T2
 893           psrlq         \$5,$Xi
 894           pxor          $T2,$Xi                 #
 895         lea             32($inp),$inp
 896           psrlq         \$1,$Xi                 #
 897         pclmulqdq       \$0x00,$HK,$Xmn         #######
 898           pxor          $Xhi,$Xi                #
 899           .byte         0x66,0x90
 900
 901         sub             \$0x20,$len
 902         ja              .Lmod_loop
 903
 904 .Leven_tail:
 905          movdqa         $Xi,$Xhi
 906          movdqa         $Xmn,$T1
 907          pshufd         \$0b01001110,$Xi,$Xmn   #
 908          pxor           $Xi,$Xmn                #
 909
 910         pclmulqdq       \$0x00,$Hkey2,$Xi
 911         pclmulqdq       \$0x11,$Hkey2,$Xhi
 912         pclmulqdq       \$0x10,$HK,$Xmn
 913
 914         pxor            $Xln,$Xi                # (H*Ii+1) + H^2*(Ii+Xi)
 915         pxor            $Xhn,$Xhi
 916         pxor            $Xi,$T1
 917         pxor            $Xhi,$T1
 918         pxor            $T1,$Xmn
 919         movdqa          $Xmn,$T1                #
 920         psrldq          \$8,$T1
 921         pslldq          \$8,$Xmn                #
 922         pxor            $T1,$Xhi
 923         pxor            $Xmn,$Xi                #
 924 ___
 925         &reduction_alg9 ($Xhi,$Xi);
 926 $code.=<<___;
 927         test            $len,$len
 928         jnz             .Ldone
 929
 930 .Lodd_tail:
 931         movdqu          ($inp),$T1              # Ii
 932         pshufb          $T3,$T1
 933         pxor            $T1,$Xi                 # Ii+Xi
 934 ___
 935         &clmul64x64_T2  ($Xhi,$Xi,$Hkey,$HK);   # H*(Ii+Xi)
 936         &reduction_alg9 ($Xhi,$Xi);
 937 $code.=<<___;
 938 .Ldone:
 939         pshufb          $T3,$Xi
 940         movdqu          $Xi,($Xip)
 941 ___
 942 $code.=<<___ if ($win64);
 943         movaps  (%rsp),%xmm6
 944         movaps  0x10(%rsp),%xmm7
 945         movaps  0x20(%rsp),%xmm8
 946         movaps  0x30(%rsp),%xmm9
 947         movaps  0x40(%rsp),%xmm10
 948         movaps  0x50(%rsp),%xmm11
 949         movaps  0x60(%rsp),%xmm12
 950         movaps  0x70(%rsp),%xmm13
 951         movaps  0x80(%rsp),%xmm14
 952         movaps  0x90(%rsp),%xmm15
 953         lea     0xa8(%rsp),%rsp
 954 .LSEH_end_gcm_ghash_clmul:
 955 ___
 956 $code.=<<___;
 957         ret
 958 .size   gcm_ghash_clmul,.-gcm_ghash_clmul
 959 ___
 960 }
 961 \f
 962 $code.=<<___;
 963 .globl  gcm_init_avx
 964 .type   gcm_init_avx,\@abi-omnipotent
 965 .align  32
 966 gcm_init_avx:
 967 ___
 968 if ($avx) {
 969 my ($Htbl,$Xip)=@_4args;
 970 my $HK="%xmm6";
 971
 972 $code.=<<___ if ($win64);
 973 .LSEH_begin_gcm_init_avx:
 974         # I can't trust assembler to use specific encoding:-(
 975         .byte   0x48,0x83,0xec,0x18             #sub    $0x18,%rsp
 976         .byte   0x0f,0x29,0x34,0x24             #movaps %xmm6,(%rsp)
 977 ___
 978 $code.=<<___;
 979         vzeroupper
 980
 981         vmovdqu         ($Xip),$Hkey
 982         vpshufd         \$0b01001110,$Hkey,$Hkey        # dword swap
 983
 984         # <<1 twist
 985         vpshufd         \$0b11111111,$Hkey,$T2  # broadcast uppermost dword
 986         vpsrlq          \$63,$Hkey,$T1
 987         vpsllq          \$1,$Hkey,$Hkey
 988         vpxor           $T3,$T3,$T3             #
 989         vpcmpgtd        $T2,$T3,$T3             # broadcast carry bit
 990         vpslldq         \$8,$T1,$T1
 991         vpor            $T1,$Hkey,$Hkey         # H<<=1
 992
 993         # magic reduction
 994         vpand           .L0x1c2_polynomial(%rip),$T3,$T3
 995         vpxor           $T3,$Hkey,$Hkey         # if(carry) H^=0x1c2_polynomial
 996
 997         vpunpckhqdq     $Hkey,$Hkey,$HK
 998         vmovdqa         $Hkey,$Xi
 999         vpxor           $Hkey,$HK,$HK
1000         mov             \$4,%r10                # up to H^8
1001         jmp             .Linit_start_avx
1002 ___
1003
1004 sub clmul64x64_avx {
1005 my ($Xhi,$Xi,$Hkey,$HK)=@_;
1006
1007 if (!defined($HK)) {    $HK = $T2;
1008 $code.=<<___;
1009         vpunpckhqdq     $Xi,$Xi,$T1
1010         vpunpckhqdq     $Hkey,$Hkey,$T2
1011         vpxor           $Xi,$T1,$T1             #
1012         vpxor           $Hkey,$T2,$T2
1013 ___
1014 } else {
1015 $code.=<<___;
1016         vpunpckhqdq     $Xi,$Xi,$T1
1017         vpxor           $Xi,$T1,$T1             #
1018 ___
1019 }
1020 $code.=<<___;
1021         vpclmulqdq      \$0x11,$Hkey,$Xi,$Xhi   #######
1022         vpclmulqdq      \$0x00,$Hkey,$Xi,$Xi    #######
1023         vpclmulqdq      \$0x00,$HK,$T1,$T1      #######
1024         vpxor           $Xi,$Xhi,$T2            #
1025         vpxor           $T2,$T1,$T1             #
1026
1027         vpslldq         \$8,$T1,$T2             #
1028         vpsrldq         \$8,$T1,$T1
1029         vpxor           $T2,$Xi,$Xi             #
1030         vpxor           $T1,$Xhi,$Xhi
1031 ___
1032 }
1033
1034 sub reduction_avx {
1035 my ($Xhi,$Xi) = @_;
1036
1037 $code.=<<___;
1038         vpsllq          \$57,$Xi,$T1            # 1st phase
1039         vpsllq          \$62,$Xi,$T2
1040         vpxor           $T1,$T2,$T2             #
1041         vpsllq          \$63,$Xi,$T1
1042         vpxor           $T1,$T2,$T2             #
1043         vpslldq         \$8,$T2,$T1             #
1044         vpsrldq         \$8,$T2,$T2
1045         vpxor           $T1,$Xi,$Xi             #
1046         vpxor           $T2,$Xhi,$Xhi
1047
1048         vpsrlq          \$1,$Xi,$T2             # 2nd phase
1049         vpxor           $Xi,$Xhi,$Xhi
1050         vpxor           $T2,$Xi,$Xi             #
1051         vpsrlq          \$5,$T2,$T2
1052         vpxor           $T2,$Xi,$Xi             #
1053         vpsrlq          \$1,$Xi,$Xi             #
1054         vpxor           $Xhi,$Xi,$Xi            #
1055 ___
1056 }
1057
1058 $code.=<<___;
1059 .align  32
1060 .Linit_loop_avx:
1061         vpalignr        \$8,$T1,$T2,$T3         # low part is H.lo^H.hi...
1062         vmovdqu         $T3,-0x10($Htbl)        # save Karatsuba "salt"
1063 ___
1064         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^3,5,7
1065         &reduction_avx  ($Xhi,$Xi);
1066 $code.=<<___;
1067 .Linit_start_avx:
1068         vmovdqa         $Xi,$T3
1069 ___
1070         &clmul64x64_avx ($Xhi,$Xi,$Hkey,$HK);   # calculate H^2,4,6,8
1071         &reduction_avx  ($Xhi,$Xi);
1072 $code.=<<___;
1073         vpshufd         \$0b01001110,$T3,$T1
1074         vpshufd         \$0b01001110,$Xi,$T2
1075         vpxor           $T3,$T1,$T1             # Karatsuba pre-processing
1076         vmovdqu         $T3,0x00($Htbl)         # save H^1,3,5,7
1077         vpxor           $Xi,$T2,$T2             # Karatsuba pre-processing
1078         vmovdqu         $Xi,0x10($Htbl)         # save H^2,4,6,8
1079         lea             0x30($Htbl),$Htbl
1080         sub             \$1,%r10
1081         jnz             .Linit_loop_avx
1082
1083         vpalignr        \$8,$T2,$T1,$T3         # last "salt" is flipped
1084         vmovdqu         $T3,-0x10($Htbl)
1085
1086         vzeroupper
1087 ___
1088 $code.=<<___ if ($win64);
1089         movaps  (%rsp),%xmm6
1090         lea     0x18(%rsp),%rsp
1091 .LSEH_end_gcm_init_avx:
1092 ___
1093 $code.=<<___;
1094         ret
1095 .size   gcm_init_avx,.-gcm_init_avx
1096 ___
1097 } else {
1098 $code.=<<___;
1099         jmp     .L_init_clmul
1100 .size   gcm_init_avx,.-gcm_init_avx
1101 ___
1102 }
1103
1104 $code.=<<___;
1105 .globl  gcm_gmult_avx
1106 .type   gcm_gmult_avx,\@abi-omnipotent
1107 .align  32
1108 gcm_gmult_avx:
1109         jmp     .L_gmult_clmul
1110 .size   gcm_gmult_avx,.-gcm_gmult_avx
1111 ___
1112 \f
1113 $code.=<<___;
1114 .globl  gcm_ghash_avx
1115 .type   gcm_ghash_avx,\@abi-omnipotent
1116 .align  32
1117 gcm_ghash_avx:
1118 ___
1119 if ($avx) {
1120 my ($Xip,$Htbl,$inp,$len)=@_4args;
1121 my ($Xlo,$Xhi,$Xmi,
1122     $Zlo,$Zhi,$Zmi,
1123     $Hkey,$HK,$T1,$T2,
1124     $Xi,$Xo,$Tred,$bswap,$Ii,$Ij) = map("%xmm$_",(0..15));
1125
1126 $code.=<<___ if ($win64);
1127         lea     -0x88(%rsp),%rax
1128 .LSEH_begin_gcm_ghash_avx:
1129         # I can't trust assembler to use specific encoding:-(
1130         .byte   0x48,0x8d,0x60,0xe0             #lea    -0x20(%rax),%rsp
1131         .byte   0x0f,0x29,0x70,0xe0             #movaps %xmm6,-0x20(%rax)
1132         .byte   0x0f,0x29,0x78,0xf0             #movaps %xmm7,-0x10(%rax)
1133         .byte   0x44,0x0f,0x29,0x00             #movaps %xmm8,0(%rax)
1134         .byte   0x44,0x0f,0x29,0x48,0x10        #movaps %xmm9,0x10(%rax)
1135         .byte   0x44,0x0f,0x29,0x50,0x20        #movaps %xmm10,0x20(%rax)
1136         .byte   0x44,0x0f,0x29,0x58,0x30        #movaps %xmm11,0x30(%rax)
1137         .byte   0x44,0x0f,0x29,0x60,0x40        #movaps %xmm12,0x40(%rax)
1138         .byte   0x44,0x0f,0x29,0x68,0x50        #movaps %xmm13,0x50(%rax)
1139         .byte   0x44,0x0f,0x29,0x70,0x60        #movaps %xmm14,0x60(%rax)
1140         .byte   0x44,0x0f,0x29,0x78,0x70        #movaps %xmm15,0x70(%rax)
1141 ___
1142 $code.=<<___;
1143         vzeroupper
1144
1145         vmovdqu         ($Xip),$Xi              # load $Xi
1146         lea             .L0x1c2_polynomial(%rip),%r10
1147         lea             0x40($Htbl),$Htbl       # size optimization
1148         vmovdqu         .Lbswap_mask(%rip),$bswap
1149         vpshufb         $bswap,$Xi,$Xi
1150         cmp             \$0x80,$len
1151         jb              .Lshort_avx
1152         sub             \$0x80,$len
1153
1154         vmovdqu         0x70($inp),$Ii          # I[7]
1155         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1156         vpshufb         $bswap,$Ii,$Ii
1157         vmovdqu         0x20-0x40($Htbl),$HK
1158
1159         vpunpckhqdq     $Ii,$Ii,$T2
1160          vmovdqu        0x60($inp),$Ij          # I[6]
1161         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1162         vpxor           $Ii,$T2,$T2
1163          vpshufb        $bswap,$Ij,$Ij
1164         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1165          vmovdqu        0x10-0x40($Htbl),$Hkey  # $Hkey^2
1166          vpunpckhqdq    $Ij,$Ij,$T1
1167          vmovdqu        0x50($inp),$Ii          # I[5]
1168         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1169          vpxor          $Ij,$T1,$T1
1170
1171          vpshufb        $bswap,$Ii,$Ii
1172         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1173          vpunpckhqdq    $Ii,$Ii,$T2
1174         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1175          vmovdqu        0x30-0x40($Htbl),$Hkey  # $Hkey^3
1176          vpxor          $Ii,$T2,$T2
1177          vmovdqu        0x40($inp),$Ij          # I[4]
1178         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1179          vmovdqu        0x50-0x40($Htbl),$HK
1180
1181          vpshufb        $bswap,$Ij,$Ij
1182         vpxor           $Xlo,$Zlo,$Zlo
1183         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1184         vpxor           $Xhi,$Zhi,$Zhi
1185          vpunpckhqdq    $Ij,$Ij,$T1
1186         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1187          vmovdqu        0x40-0x40($Htbl),$Hkey  # $Hkey^4
1188         vpxor           $Xmi,$Zmi,$Zmi
1189         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1190          vpxor          $Ij,$T1,$T1
1191
1192          vmovdqu        0x30($inp),$Ii          # I[3]
1193         vpxor           $Zlo,$Xlo,$Xlo
1194         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1195         vpxor           $Zhi,$Xhi,$Xhi
1196          vpshufb        $bswap,$Ii,$Ii
1197         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1198          vmovdqu        0x60-0x40($Htbl),$Hkey  # $Hkey^5
1199         vpxor           $Zmi,$Xmi,$Xmi
1200          vpunpckhqdq    $Ii,$Ii,$T2
1201         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1202          vmovdqu        0x80-0x40($Htbl),$HK
1203          vpxor          $Ii,$T2,$T2
1204
1205          vmovdqu        0x20($inp),$Ij          # I[2]
1206         vpxor           $Xlo,$Zlo,$Zlo
1207         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1208         vpxor           $Xhi,$Zhi,$Zhi
1209          vpshufb        $bswap,$Ij,$Ij
1210         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1211          vmovdqu        0x70-0x40($Htbl),$Hkey  # $Hkey^6
1212         vpxor           $Xmi,$Zmi,$Zmi
1213          vpunpckhqdq    $Ij,$Ij,$T1
1214         vpclmulqdq      \$0x00,$HK,$T2,$Xmi
1215          vpxor          $Ij,$T1,$T1
1216
1217          vmovdqu        0x10($inp),$Ii          # I[1]
1218         vpxor           $Zlo,$Xlo,$Xlo
1219         vpclmulqdq      \$0x00,$Hkey,$Ij,$Zlo
1220         vpxor           $Zhi,$Xhi,$Xhi
1221          vpshufb        $bswap,$Ii,$Ii
1222         vpclmulqdq      \$0x11,$Hkey,$Ij,$Zhi
1223          vmovdqu        0x90-0x40($Htbl),$Hkey  # $Hkey^7
1224         vpxor           $Zmi,$Xmi,$Xmi
1225          vpunpckhqdq    $Ii,$Ii,$T2
1226         vpclmulqdq      \$0x10,$HK,$T1,$Zmi
1227          vmovdqu        0xb0-0x40($Htbl),$HK
1228          vpxor          $Ii,$T2,$T2
1229
1230          vmovdqu        ($inp),$Ij              # I[0]
1231         vpxor           $Xlo,$Zlo,$Zlo
1232         vpclmulqdq      \$0x00,$Hkey,$Ii,$Xlo
1233         vpxor           $Xhi,$Zhi,$Zhi
1234          vpshufb        $bswap,$Ij,$Ij
1235         vpclmulqdq      \$0x11,$Hkey,$Ii,$Xhi
1236          vmovdqu        0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1237         vpxor           $Xmi,$Zmi,$Zmi
1238         vpclmulqdq      \$0x10,$HK,$T2,$Xmi
1239
1240         lea             0x80($inp),$inp
1241         cmp             \$0x80,$len
1242         jb              .Ltail_avx
1243
1244         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1245         sub             \$0x80,$len
1246         jmp             .Loop8x_avx
1247
1248 .align  32
1249 .Loop8x_avx:
1250         vpunpckhqdq     $Ij,$Ij,$T1
1251          vmovdqu        0x70($inp),$Ii          # I[7]
1252         vpxor           $Xlo,$Zlo,$Zlo
1253         vpxor           $Ij,$T1,$T1
1254         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xi
1255          vpshufb        $bswap,$Ii,$Ii
1256         vpxor           $Xhi,$Zhi,$Zhi
1257         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xo
1258          vmovdqu        0x00-0x40($Htbl),$Hkey  # $Hkey^1
1259          vpunpckhqdq    $Ii,$Ii,$T2
1260         vpxor           $Xmi,$Zmi,$Zmi
1261         vpclmulqdq      \$0x00,$HK,$T1,$Tred
1262          vmovdqu        0x20-0x40($Htbl),$HK
1263          vpxor          $Ii,$T2,$T2
1264
1265           vmovdqu       0x60($inp),$Ij          # I[6]
1266          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1267         vpxor           $Zlo,$Xi,$Xi            # collect result
1268           vpshufb       $bswap,$Ij,$Ij
1269          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1270         vxorps          $Zhi,$Xo,$Xo
1271           vmovdqu       0x10-0x40($Htbl),$Hkey  # $Hkey^2
1272          vpunpckhqdq    $Ij,$Ij,$T1
1273          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1274         vpxor           $Zmi,$Tred,$Tred
1275          vxorps         $Ij,$T1,$T1
1276
1277           vmovdqu       0x50($inp),$Ii          # I[5]
1278         vpxor           $Xi,$Tred,$Tred         # aggregated Karatsuba post-processing
1279          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1280         vpxor           $Xo,$Tred,$Tred
1281         vpslldq         \$8,$Tred,$T2
1282          vpxor          $Xlo,$Zlo,$Zlo
1283          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1284         vpsrldq         \$8,$Tred,$Tred
1285         vpxor           $T2, $Xi, $Xi
1286           vmovdqu       0x30-0x40($Htbl),$Hkey  # $Hkey^3
1287           vpshufb       $bswap,$Ii,$Ii
1288         vxorps          $Tred,$Xo, $Xo
1289          vpxor          $Xhi,$Zhi,$Zhi
1290          vpunpckhqdq    $Ii,$Ii,$T2
1291          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1292           vmovdqu       0x50-0x40($Htbl),$HK
1293          vpxor          $Ii,$T2,$T2
1294          vpxor          $Xmi,$Zmi,$Zmi
1295
1296           vmovdqu       0x40($inp),$Ij          # I[4]
1297         vpalignr        \$8,$Xi,$Xi,$Tred       # 1st phase
1298          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1299           vpshufb       $bswap,$Ij,$Ij
1300          vpxor          $Zlo,$Xlo,$Xlo
1301          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1302           vmovdqu       0x40-0x40($Htbl),$Hkey  # $Hkey^4
1303          vpunpckhqdq    $Ij,$Ij,$T1
1304          vpxor          $Zhi,$Xhi,$Xhi
1305          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1306          vxorps         $Ij,$T1,$T1
1307          vpxor          $Zmi,$Xmi,$Xmi
1308
1309           vmovdqu       0x30($inp),$Ii          # I[3]
1310         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1311          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1312           vpshufb       $bswap,$Ii,$Ii
1313          vpxor          $Xlo,$Zlo,$Zlo
1314          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1315           vmovdqu       0x60-0x40($Htbl),$Hkey  # $Hkey^5
1316          vpunpckhqdq    $Ii,$Ii,$T2
1317          vpxor          $Xhi,$Zhi,$Zhi
1318          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1319           vmovdqu       0x80-0x40($Htbl),$HK
1320          vpxor          $Ii,$T2,$T2
1321          vpxor          $Xmi,$Zmi,$Zmi
1322
1323           vmovdqu       0x20($inp),$Ij          # I[2]
1324          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1325           vpshufb       $bswap,$Ij,$Ij
1326          vpxor          $Zlo,$Xlo,$Xlo
1327          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1328           vmovdqu       0x70-0x40($Htbl),$Hkey  # $Hkey^6
1329          vpunpckhqdq    $Ij,$Ij,$T1
1330          vpxor          $Zhi,$Xhi,$Xhi
1331          vpclmulqdq     \$0x00,$HK,  $T2,$Xmi
1332          vpxor          $Ij,$T1,$T1
1333          vpxor          $Zmi,$Xmi,$Xmi
1334         vxorps          $Tred,$Xi,$Xi
1335
1336           vmovdqu       0x10($inp),$Ii          # I[1]
1337         vpalignr        \$8,$Xi,$Xi,$Tred       # 2nd phase
1338          vpclmulqdq     \$0x00,$Hkey,$Ij,$Zlo
1339           vpshufb       $bswap,$Ii,$Ii
1340          vpxor          $Xlo,$Zlo,$Zlo
1341          vpclmulqdq     \$0x11,$Hkey,$Ij,$Zhi
1342           vmovdqu       0x90-0x40($Htbl),$Hkey  # $Hkey^7
1343         vpclmulqdq      \$0x10,(%r10),$Xi,$Xi
1344         vxorps          $Xo,$Tred,$Tred
1345          vpunpckhqdq    $Ii,$Ii,$T2
1346          vpxor          $Xhi,$Zhi,$Zhi
1347          vpclmulqdq     \$0x10,$HK,  $T1,$Zmi
1348           vmovdqu       0xb0-0x40($Htbl),$HK
1349          vpxor          $Ii,$T2,$T2
1350          vpxor          $Xmi,$Zmi,$Zmi
1351
1352           vmovdqu       ($inp),$Ij              # I[0]
1353          vpclmulqdq     \$0x00,$Hkey,$Ii,$Xlo
1354           vpshufb       $bswap,$Ij,$Ij
1355          vpclmulqdq     \$0x11,$Hkey,$Ii,$Xhi
1356           vmovdqu       0xa0-0x40($Htbl),$Hkey  # $Hkey^8
1357         vpxor           $Tred,$Ij,$Ij
1358          vpclmulqdq     \$0x10,$HK,  $T2,$Xmi
1359         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1360
1361         lea             0x80($inp),$inp
1362         sub             \$0x80,$len
1363         jnc             .Loop8x_avx
1364
1365         add             \$0x80,$len
1366         jmp             .Ltail_no_xor_avx
1367
1368 .align  32
1369 .Lshort_avx:
1370         vmovdqu         -0x10($inp,$len),$Ii    # very last word
1371         lea             ($inp,$len),$inp
1372         vmovdqu         0x00-0x40($Htbl),$Hkey  # $Hkey^1
1373         vmovdqu         0x20-0x40($Htbl),$HK
1374         vpshufb         $bswap,$Ii,$Ij
1375
1376         vmovdqa         $Xlo,$Zlo               # subtle way to zero $Zlo,
1377         vmovdqa         $Xhi,$Zhi               # $Zhi and
1378         vmovdqa         $Xmi,$Zmi               # $Zmi
1379         sub             \$0x10,$len
1380         jz              .Ltail_avx
1381
1382         vpunpckhqdq     $Ij,$Ij,$T1
1383         vpxor           $Xlo,$Zlo,$Zlo
1384         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1385         vpxor           $Ij,$T1,$T1
1386          vmovdqu        -0x20($inp),$Ii
1387         vpxor           $Xhi,$Zhi,$Zhi
1388         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1389         vmovdqu         0x10-0x40($Htbl),$Hkey  # $Hkey^2
1390          vpshufb        $bswap,$Ii,$Ij
1391         vpxor           $Xmi,$Zmi,$Zmi
1392         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1393         vpsrldq         \$8,$HK,$HK
1394         sub             \$0x10,$len
1395         jz              .Ltail_avx
1396
1397         vpunpckhqdq     $Ij,$Ij,$T1
1398         vpxor           $Xlo,$Zlo,$Zlo
1399         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1400         vpxor           $Ij,$T1,$T1
1401          vmovdqu        -0x30($inp),$Ii
1402         vpxor           $Xhi,$Zhi,$Zhi
1403         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1404         vmovdqu         0x30-0x40($Htbl),$Hkey  # $Hkey^3
1405          vpshufb        $bswap,$Ii,$Ij
1406         vpxor           $Xmi,$Zmi,$Zmi
1407         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1408         vmovdqu         0x50-0x40($Htbl),$HK
1409         sub             \$0x10,$len
1410         jz              .Ltail_avx
1411
1412         vpunpckhqdq     $Ij,$Ij,$T1
1413         vpxor           $Xlo,$Zlo,$Zlo
1414         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1415         vpxor           $Ij,$T1,$T1
1416          vmovdqu        -0x40($inp),$Ii
1417         vpxor           $Xhi,$Zhi,$Zhi
1418         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1419         vmovdqu         0x40-0x40($Htbl),$Hkey  # $Hkey^4
1420          vpshufb        $bswap,$Ii,$Ij
1421         vpxor           $Xmi,$Zmi,$Zmi
1422         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1423         vpsrldq         \$8,$HK,$HK
1424         sub             \$0x10,$len
1425         jz              .Ltail_avx
1426
1427         vpunpckhqdq     $Ij,$Ij,$T1
1428         vpxor           $Xlo,$Zlo,$Zlo
1429         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1430         vpxor           $Ij,$T1,$T1
1431          vmovdqu        -0x50($inp),$Ii
1432         vpxor           $Xhi,$Zhi,$Zhi
1433         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1434         vmovdqu         0x60-0x40($Htbl),$Hkey  # $Hkey^5
1435          vpshufb        $bswap,$Ii,$Ij
1436         vpxor           $Xmi,$Zmi,$Zmi
1437         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1438         vmovdqu         0x80-0x40($Htbl),$HK
1439         sub             \$0x10,$len
1440         jz              .Ltail_avx
1441
1442         vpunpckhqdq     $Ij,$Ij,$T1
1443         vpxor           $Xlo,$Zlo,$Zlo
1444         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1445         vpxor           $Ij,$T1,$T1
1446          vmovdqu        -0x60($inp),$Ii
1447         vpxor           $Xhi,$Zhi,$Zhi
1448         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1449         vmovdqu         0x70-0x40($Htbl),$Hkey  # $Hkey^6
1450          vpshufb        $bswap,$Ii,$Ij
1451         vpxor           $Xmi,$Zmi,$Zmi
1452         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1453         vpsrldq         \$8,$HK,$HK
1454         sub             \$0x10,$len
1455         jz              .Ltail_avx
1456
1457         vpunpckhqdq     $Ij,$Ij,$T1
1458         vpxor           $Xlo,$Zlo,$Zlo
1459         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1460         vpxor           $Ij,$T1,$T1
1461          vmovdqu        -0x70($inp),$Ii
1462         vpxor           $Xhi,$Zhi,$Zhi
1463         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1464         vmovdqu         0x90-0x40($Htbl),$Hkey  # $Hkey^7
1465          vpshufb        $bswap,$Ii,$Ij
1466         vpxor           $Xmi,$Zmi,$Zmi
1467         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1468         vmovq           0xb8-0x40($Htbl),$HK
1469         sub             \$0x10,$len
1470         jmp             .Ltail_avx
1471
1472 .align  32
1473 .Ltail_avx:
1474         vpxor           $Xi,$Ij,$Ij             # accumulate $Xi
1475 .Ltail_no_xor_avx:
1476         vpunpckhqdq     $Ij,$Ij,$T1
1477         vpxor           $Xlo,$Zlo,$Zlo
1478         vpclmulqdq      \$0x00,$Hkey,$Ij,$Xlo
1479         vpxor           $Ij,$T1,$T1
1480         vpxor           $Xhi,$Zhi,$Zhi
1481         vpclmulqdq      \$0x11,$Hkey,$Ij,$Xhi
1482         vpxor           $Xmi,$Zmi,$Zmi
1483         vpclmulqdq      \$0x00,$HK,$T1,$Xmi
1484
1485         vmovdqu         (%r10),$Tred
1486
1487         vpxor           $Xlo,$Zlo,$Xi
1488         vpxor           $Xhi,$Zhi,$Xo
1489         vpxor           $Xmi,$Zmi,$Zmi
1490
1491         vpxor           $Xi, $Zmi,$Zmi          # aggregated Karatsuba post-processing
1492         vpxor           $Xo, $Zmi,$Zmi
1493         vpslldq         \$8, $Zmi,$T2
1494         vpsrldq         \$8, $Zmi,$Zmi
1495         vpxor           $T2, $Xi, $Xi
1496         vpxor           $Zmi,$Xo, $Xo
1497
1498         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 1st phase
1499         vpalignr        \$8,$Xi,$Xi,$Xi
1500         vpxor           $T2,$Xi,$Xi
1501
1502         vpclmulqdq      \$0x10,$Tred,$Xi,$T2    # 2nd phase
1503         vpalignr        \$8,$Xi,$Xi,$Xi
1504         vpxor           $Xo,$Xi,$Xi
1505         vpxor           $T2,$Xi,$Xi
1506
1507         cmp             \$0,$len
1508         jne             .Lshort_avx
1509
1510         vpshufb         $bswap,$Xi,$Xi
1511         vmovdqu         $Xi,($Xip)
1512         vzeroupper
1513 ___
1514 $code.=<<___ if ($win64);
1515         movaps  (%rsp),%xmm6
1516         movaps  0x10(%rsp),%xmm7
1517         movaps  0x20(%rsp),%xmm8
1518         movaps  0x30(%rsp),%xmm9
1519         movaps  0x40(%rsp),%xmm10
1520         movaps  0x50(%rsp),%xmm11
1521         movaps  0x60(%rsp),%xmm12
1522         movaps  0x70(%rsp),%xmm13
1523         movaps  0x80(%rsp),%xmm14
1524         movaps  0x90(%rsp),%xmm15
1525         lea     0xa8(%rsp),%rsp
1526 .LSEH_end_gcm_ghash_avx:
1527 ___
1528 $code.=<<___;
1529         ret
1530 .size   gcm_ghash_avx,.-gcm_ghash_avx
1531 ___
1532 } else {
1533 $code.=<<___;
1534         jmp     .L_ghash_clmul
1535 .size   gcm_ghash_avx,.-gcm_ghash_avx
1536 ___
1537 }
1538 \f
1539 $code.=<<___;
1540 .align  64
1541 .Lbswap_mask:
1542         .byte   15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
1543 .L0x1c2_polynomial:
1544         .byte   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2
1545 .L7_mask:
1546         .long   7,0,7,0
1547 .L7_mask_poly:
1548         .long   7,0,`0xE1<<1`,0
1549 .align  64
1550 .type   .Lrem_4bit,\@object
1551 .Lrem_4bit:
1552         .long   0,`0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`
1553         .long   0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
1554         .long   0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
1555         .long   0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
1556 .type   .Lrem_8bit,\@object
1557 .Lrem_8bit:
1558         .value  0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
1559         .value  0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
1560         .value  0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
1561         .value  0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
1562         .value  0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
1563         .value  0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
1564         .value  0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
1565         .value  0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
1566         .value  0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
1567         .value  0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
1568         .value  0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
1569         .value  0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
1570         .value  0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
1571         .value  0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
1572         .value  0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
1573         .value  0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
1574         .value  0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
1575         .value  0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
1576         .value  0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
1577         .value  0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
1578         .value  0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
1579         .value  0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
1580         .value  0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
1581         .value  0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
1582         .value  0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
1583         .value  0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
1584         .value  0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
1585         .value  0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
1586         .value  0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
1587         .value  0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
1588         .value  0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
1589         .value  0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
1590
1591 .asciz  "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
1592 .align  64
1593 ___
1594 \f
1595 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
1596 #               CONTEXT *context,DISPATCHER_CONTEXT *disp)
1597 if ($win64) {
1598 $rec="%rcx";
1599 $frame="%rdx";
1600 $context="%r8";
1601 $disp="%r9";
1602
1603 $code.=<<___;
1604 .extern __imp_RtlVirtualUnwind
1605 .type   se_handler,\@abi-omnipotent
1606 .align  16
1607 se_handler:
1608         push    %rsi
1609         push    %rdi
1610         push    %rbx
1611         push    %rbp
1612         push    %r12
1613         push    %r13
1614         push    %r14
1615         push    %r15
1616         pushfq
1617         sub     \$64,%rsp
1618
1619         mov     120($context),%rax      # pull context->Rax
1620         mov     248($context),%rbx      # pull context->Rip
1621
1622         mov     8($disp),%rsi           # disp->ImageBase
1623         mov     56($disp),%r11          # disp->HandlerData
1624
1625         mov     0(%r11),%r10d           # HandlerData[0]
1626         lea     (%rsi,%r10),%r10        # prologue label
1627         cmp     %r10,%rbx               # context->Rip<prologue label
1628         jb      .Lin_prologue
1629
1630         mov     152($context),%rax      # pull context->Rsp
1631
1632         mov     4(%r11),%r10d           # HandlerData[1]
1633         lea     (%rsi,%r10),%r10        # epilogue label
1634         cmp     %r10,%rbx               # context->Rip>=epilogue label
1635         jae     .Lin_prologue
1636
1637         lea     24(%rax),%rax           # adjust "rsp"
1638
1639         mov     -8(%rax),%rbx
1640         mov     -16(%rax),%rbp
1641         mov     -24(%rax),%r12
1642         mov     %rbx,144($context)      # restore context->Rbx
1643         mov     %rbp,160($context)      # restore context->Rbp
1644         mov     %r12,216($context)      # restore context->R12
1645
1646 .Lin_prologue:
1647         mov     8(%rax),%rdi
1648         mov     16(%rax),%rsi
1649         mov     %rax,152($context)      # restore context->Rsp
1650         mov     %rsi,168($context)      # restore context->Rsi
1651         mov     %rdi,176($context)      # restore context->Rdi
1652
1653         mov     40($disp),%rdi          # disp->ContextRecord
1654         mov     $context,%rsi           # context
1655         mov     \$`1232/8`,%ecx         # sizeof(CONTEXT)
1656         .long   0xa548f3fc              # cld; rep movsq
1657
1658         mov     $disp,%rsi
1659         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
1660         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
1661         mov     0(%rsi),%r8             # arg3, disp->ControlPc
1662         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
1663         mov     40(%rsi),%r10           # disp->ContextRecord
1664         lea     56(%rsi),%r11           # &disp->HandlerData
1665         lea     24(%rsi),%r12           # &disp->EstablisherFrame
1666         mov     %r10,32(%rsp)           # arg5
1667         mov     %r11,40(%rsp)           # arg6
1668         mov     %r12,48(%rsp)           # arg7
1669         mov     %rcx,56(%rsp)           # arg8, (NULL)
1670         call    *__imp_RtlVirtualUnwind(%rip)
1671
1672         mov     \$1,%eax                # ExceptionContinueSearch
1673         add     \$64,%rsp
1674         popfq
1675         pop     %r15
1676         pop     %r14
1677         pop     %r13
1678         pop     %r12
1679         pop     %rbp
1680         pop     %rbx
1681         pop     %rdi
1682         pop     %rsi
1683         ret
1684 .size   se_handler,.-se_handler
1685
1686 .section        .pdata
1687 .align  4
1688         .rva    .LSEH_begin_gcm_gmult_4bit
1689         .rva    .LSEH_end_gcm_gmult_4bit
1690         .rva    .LSEH_info_gcm_gmult_4bit
1691
1692         .rva    .LSEH_begin_gcm_ghash_4bit
1693         .rva    .LSEH_end_gcm_ghash_4bit
1694         .rva    .LSEH_info_gcm_ghash_4bit
1695
1696         .rva    .LSEH_begin_gcm_init_clmul
1697         .rva    .LSEH_end_gcm_init_clmul
1698         .rva    .LSEH_info_gcm_init_clmul
1699
1700         .rva    .LSEH_begin_gcm_ghash_clmul
1701         .rva    .LSEH_end_gcm_ghash_clmul
1702         .rva    .LSEH_info_gcm_ghash_clmul
1703 ___
1704 $code.=<<___    if ($avx);
1705         .rva    .LSEH_begin_gcm_init_avx
1706         .rva    .LSEH_end_gcm_init_avx
1707         .rva    .LSEH_info_gcm_init_clmul
1708
1709         .rva    .LSEH_begin_gcm_ghash_avx
1710         .rva    .LSEH_end_gcm_ghash_avx
1711         .rva    .LSEH_info_gcm_ghash_clmul
1712 ___
1713 $code.=<<___;
1714 .section        .xdata
1715 .align  8
1716 .LSEH_info_gcm_gmult_4bit:
1717         .byte   9,0,0,0
1718         .rva    se_handler
1719         .rva    .Lgmult_prologue,.Lgmult_epilogue       # HandlerData
1720 .LSEH_info_gcm_ghash_4bit:
1721         .byte   9,0,0,0
1722         .rva    se_handler
1723         .rva    .Lghash_prologue,.Lghash_epilogue       # HandlerData
1724 .LSEH_info_gcm_init_clmul:
1725         .byte   0x01,0x08,0x03,0x00
1726         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1727         .byte   0x04,0x22,0x00,0x00     #sub    rsp,0x18
1728 .LSEH_info_gcm_ghash_clmul:
1729         .byte   0x01,0x33,0x16,0x00
1730         .byte   0x33,0xf8,0x09,0x00     #movaps 0x90(rsp),xmm15
1731         .byte   0x2e,0xe8,0x08,0x00     #movaps 0x80(rsp),xmm14
1732         .byte   0x29,0xd8,0x07,0x00     #movaps 0x70(rsp),xmm13
1733         .byte   0x24,0xc8,0x06,0x00     #movaps 0x60(rsp),xmm12
1734         .byte   0x1f,0xb8,0x05,0x00     #movaps 0x50(rsp),xmm11
1735         .byte   0x1a,0xa8,0x04,0x00     #movaps 0x40(rsp),xmm10
1736         .byte   0x15,0x98,0x03,0x00     #movaps 0x30(rsp),xmm9
1737         .byte   0x10,0x88,0x02,0x00     #movaps 0x20(rsp),xmm8
1738         .byte   0x0c,0x78,0x01,0x00     #movaps 0x10(rsp),xmm7
1739         .byte   0x08,0x68,0x00,0x00     #movaps 0x00(rsp),xmm6
1740         .byte   0x04,0x01,0x15,0x00     #sub    rsp,0xa8
1741 ___
1742 }
1743 \f
1744 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
1745
1746 print $code;
1747
1748 close STDOUT;