crypto/modes/asm/aesni-gcm-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 #
  11 # AES-NI-CTR+GHASH stitch.
  12 #
  13 # February 2013
  14 #
  15 # OpenSSL GCM implementation is organized in such way that its
  16 # performance is rather close to the sum of its streamed components,
  17 # in the context parallelized AES-NI CTR and modulo-scheduled
  18 # PCLMULQDQ-enabled GHASH. Unfortunately, as no stitch implementation
  19 # was observed to perform significantly better than the sum of the
  20 # components on contemporary CPUs, the effort was deemed impossible to
  21 # justify. This module is based on combination of Intel submissions,
  22 # [1] and [2], with MOVBE twist suggested by Ilya Albrekht and Max
  23 # Locktyukhin of Intel Corp. who verified that it reduces shuffles
  24 # pressure with notable relative improvement, achieving 1.0 cycle per
  25 # byte processed with 128-bit key on Haswell processor.
  26 #
  27 # [1] http://rt.openssl.org/Ticket/Display.html?id=2900&user=guest&pass=guest
  28 # [2] http://www.intel.com/content/dam/www/public/us/en/documents/software-support/enabling-high-performance-gcm.pdf
  29
  30 $flavour = shift;
  31 $output  = shift;
  32 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
  33
  34 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  35
  36 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  37 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  38 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
  39 die "can't locate x86_64-xlate.pl";
  40
  41 if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
  42                 =~ /GNU assembler version ([2-9]\.[0-9]+)/) {
  43         $avx = ($1>=2.19) + ($1>=2.22);
  44 }
  45
  46 if (!$avx && $win64 && ($flavour =~ /nasm/ || $ENV{ASM} =~ /nasm/) &&
  47             `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
  48         $avx = ($1>=2.09) + ($1>=2.10);
  49 }
  50
  51 if (!$avx && $win64 && ($flavour =~ /masm/ || $ENV{ASM} =~ /ml64/) &&
  52             `ml64 2>&1` =~ /Version ([0-9]+)\./) {
  53         $avx = ($1>=10) + ($1>=11);
  54 }
  55
  56 if (!$avx && `$ENV{CC} -v 2>&1` =~ /LLVM ([3-9]\.[0-9]+)/) {
  57         $avx = ($1>=3.0) + ($1>=3.1);
  58 }
  59
  60 open OUT,"| \"$^X\" $xlate $flavour $output";
  61 *STDOUT=*OUT;
  62
  63 if ($avx>1) {{{
  64
  65 ($inp,$out,$len,$key,$ivp,$Xip)=("%rdi","%rsi","%rdx","%rcx","%r8","%r9");
  66
  67 ($Ii,$T1,$T2,$Hkey,
  68  $Z0,$Z1,$Z2,$Z3,$Xi) = map("%xmm$_",(0..8));
  69
  70 ($inout0,$inout1,$inout2,$inout3,$inout4,$inout5,$rndkey) = map("%xmm$_",(9..15));
  71
  72 ($counter,$rounds,$ret,$const,$in0,$end0)=("%ebx","%ebp","%r10","%r11","%r14","%r15");
  73
  74 $code=<<___;
  75 .text
  76
  77 .type   _aesni_ctr32_ghash_6x,\@abi-omnipotent
  78 .align  32
  79 _aesni_ctr32_ghash_6x:
  80         vmovdqu         0x20($const),$T2        # borrow $T2, .Lone_msb
  81         sub             \$6,$len
  82         vpxor           $Z0,$Z0,$Z0             # $Z0   = 0
  83         vmovdqu         0x00-0x80($key),$rndkey
  84         vpaddb          $T2,$T1,$inout1
  85         vpaddb          $T2,$inout1,$inout2
  86         vpaddb          $T2,$inout2,$inout3
  87         vpaddb          $T2,$inout3,$inout4
  88         vpaddb          $T2,$inout4,$inout5
  89         vpxor           $rndkey,$T1,$inout0
  90         vmovdqu         $Z0,16+8(%rsp)          # "$Z3" = 0
  91         jmp             .Loop6x
  92
  93 .align  32
  94 .Loop6x:
  95         add             \$6<<24,$counter
  96         jc              .Lhandle_ctr32          # discard $inout[1-5]?
  97         vmovdqu         0x00-0x20($Xip),$Hkey   # $Hkey^1
  98           vpaddb        $T2,$inout5,$T1         # next counter value
  99           vpxor         $rndkey,$inout1,$inout1
 100           vpxor         $rndkey,$inout2,$inout2
 101
 102 .Lresume_ctr32:
 103         vmovdqu         $T1,($ivp)              # save next counter value
 104         vpclmulqdq      \$0x10,$Hkey,$Z3,$Z1
 105           vpxor         $rndkey,$inout3,$inout3
 106           vmovups       0x10-0x80($key),$T2     # borrow $T2 for $rndkey
 107         vpclmulqdq      \$0x01,$Hkey,$Z3,$Z2
 108         xor             %r12,%r12
 109         cmp             $in0,$end0
 110
 111           vaesenc       $T2,$inout0,$inout0
 112         vmovdqu         0x30+8(%rsp),$Ii        # I[4]
 113           vpxor         $rndkey,$inout4,$inout4
 114         vpclmulqdq      \$0x00,$Hkey,$Z3,$T1
 115           vaesenc       $T2,$inout1,$inout1
 116           vpxor         $rndkey,$inout5,$inout5
 117         setnc           %r12b
 118         vpclmulqdq      \$0x11,$Hkey,$Z3,$Z3
 119           vaesenc       $T2,$inout2,$inout2
 120         vmovdqu         0x10-0x20($Xip),$Hkey   # $Hkey^2
 121         neg             %r12
 122           vaesenc       $T2,$inout3,$inout3
 123          vpxor          $Z1,$Z2,$Z2
 124         vpclmulqdq      \$0x00,$Hkey,$Ii,$Z1
 125          vpxor          $Z0,$Xi,$Xi             # modulo-scheduled
 126           vaesenc       $T2,$inout4,$inout4
 127          vpxor          $Z1,$T1,$Z0
 128         and             \$0x60,%r12
 129           vmovups       0x20-0x80($key),$rndkey
 130         vpclmulqdq      \$0x10,$Hkey,$Ii,$T1
 131           vaesenc       $T2,$inout5,$inout5
 132
 133         vpclmulqdq      \$0x01,$Hkey,$Ii,$T2
 134         lea             ($in0,%r12),$in0
 135           vaesenc       $rndkey,$inout0,$inout0
 136          vpxor          16+8(%rsp),$Xi,$Xi      # modulo-scheduled [vpxor $Z3,$Xi,$Xi]
 137         vpclmulqdq      \$0x11,$Hkey,$Ii,$Hkey
 138          vmovdqu        0x40+8(%rsp),$Ii        # I[3]
 139           vaesenc       $rndkey,$inout1,$inout1
 140         movbe           0x58($in0),%r13
 141           vaesenc       $rndkey,$inout2,$inout2
 142         movbe           0x50($in0),%r12
 143           vaesenc       $rndkey,$inout3,$inout3
 144         mov             %r13,0x20+8(%rsp)
 145           vaesenc       $rndkey,$inout4,$inout4
 146         mov             %r12,0x28+8(%rsp)
 147         vmovdqu         0x30-0x20($Xip),$Z1     # borrow $Z1 for $Hkey^3
 148           vaesenc       $rndkey,$inout5,$inout5
 149
 150           vmovups       0x30-0x80($key),$rndkey
 151          vpxor          $T1,$Z2,$Z2
 152         vpclmulqdq      \$0x00,$Z1,$Ii,$T1
 153           vaesenc       $rndkey,$inout0,$inout0
 154          vpxor          $T2,$Z2,$Z2
 155         vpclmulqdq      \$0x10,$Z1,$Ii,$T2
 156           vaesenc       $rndkey,$inout1,$inout1
 157          vpxor          $Hkey,$Z3,$Z3
 158         vpclmulqdq      \$0x01,$Z1,$Ii,$Hkey
 159           vaesenc       $rndkey,$inout2,$inout2
 160         vpclmulqdq      \$0x11,$Z1,$Ii,$Z1
 161          vmovdqu        0x50+8(%rsp),$Ii        # I[2]
 162           vaesenc       $rndkey,$inout3,$inout3
 163           vaesenc       $rndkey,$inout4,$inout4
 164          vpxor          $T1,$Z0,$Z0
 165         vmovdqu         0x40-0x20($Xip),$T1     # borrow $T1 for $Hkey^4
 166           vaesenc       $rndkey,$inout5,$inout5
 167
 168           vmovups       0x40-0x80($key),$rndkey
 169          vpxor          $T2,$Z2,$Z2
 170         vpclmulqdq      \$0x00,$T1,$Ii,$T2
 171           vaesenc       $rndkey,$inout0,$inout0
 172          vpxor          $Hkey,$Z2,$Z2
 173         vpclmulqdq      \$0x10,$T1,$Ii,$Hkey
 174           vaesenc       $rndkey,$inout1,$inout1
 175         movbe           0x48($in0),%r13
 176          vpxor          $Z1,$Z3,$Z3
 177         vpclmulqdq      \$0x01,$T1,$Ii,$Z1
 178           vaesenc       $rndkey,$inout2,$inout2
 179         movbe           0x40($in0),%r12
 180         vpclmulqdq      \$0x11,$T1,$Ii,$T1
 181          vmovdqu        0x60+8(%rsp),$Ii        # I[1]
 182           vaesenc       $rndkey,$inout3,$inout3
 183         mov             %r13,0x30+8(%rsp)
 184           vaesenc       $rndkey,$inout4,$inout4
 185         mov             %r12,0x38+8(%rsp)
 186          vpxor          $T2,$Z0,$Z0
 187         vmovdqu         0x60-0x20($Xip),$T2     # borrow $T2 for $Hkey^5
 188           vaesenc       $rndkey,$inout5,$inout5
 189
 190           vmovups       0x50-0x80($key),$rndkey
 191          vpxor          $Hkey,$Z2,$Z2
 192         vpclmulqdq      \$0x00,$T2,$Ii,$Hkey
 193           vaesenc       $rndkey,$inout0,$inout0
 194          vpxor          $Z1,$Z2,$Z2
 195         vpclmulqdq      \$0x10,$T2,$Ii,$Z1
 196           vaesenc       $rndkey,$inout1,$inout1
 197         movbe           0x38($in0),%r13
 198          vpxor          $T1,$Z3,$Z3
 199         vpclmulqdq      \$0x01,$T2,$Ii,$T1
 200          vpxor          0x70+8(%rsp),$Xi,$Xi    # accumulate I[0]
 201           vaesenc       $rndkey,$inout2,$inout2
 202         movbe           0x30($in0),%r12
 203         vpclmulqdq      \$0x11,$T2,$Ii,$T2
 204           vaesenc       $rndkey,$inout3,$inout3
 205         mov             %r13,0x40+8(%rsp)
 206           vaesenc       $rndkey,$inout4,$inout4
 207         mov             %r12,0x48+8(%rsp)
 208          vpxor          $Hkey,$Z0,$Z0
 209          vmovdqu        0x70-0x20($Xip),$Hkey   # $Hkey^6
 210           vaesenc       $rndkey,$inout5,$inout5
 211
 212           vmovups       0x60-0x80($key),$rndkey
 213          vpxor          $Z1,$Z2,$Z2
 214         vpclmulqdq      \$0x10,$Hkey,$Xi,$Z1
 215           vaesenc       $rndkey,$inout0,$inout0
 216          vpxor          $T1,$Z2,$Z2
 217         vpclmulqdq      \$0x01,$Hkey,$Xi,$T1
 218           vaesenc       $rndkey,$inout1,$inout1
 219         movbe           0x28($in0),%r13
 220          vpxor          $T2,$Z3,$Z3
 221         vpclmulqdq      \$0x00,$Hkey,$Xi,$T2
 222           vaesenc       $rndkey,$inout2,$inout2
 223         movbe           0x20($in0),%r12
 224         vpclmulqdq      \$0x11,$Hkey,$Xi,$Xi
 225           vaesenc       $rndkey,$inout3,$inout3
 226         mov             %r13,0x50+8(%rsp)
 227           vaesenc       $rndkey,$inout4,$inout4
 228         mov             %r12,0x58+8(%rsp)
 229         vpxor           $Z1,$Z2,$Z2
 230           vaesenc       $rndkey,$inout5,$inout5
 231         vpxor           $T1,$Z2,$Z2
 232
 233           vmovups       0x70-0x80($key),$rndkey
 234         vpslldq         \$8,$Z2,$Z1
 235         vpxor           $T2,$Z0,$Z0
 236         vmovdqu         0x10($const),$Hkey      # .Lpoly
 237
 238           vaesenc       $rndkey,$inout0,$inout0
 239         vpxor           $Xi,$Z3,$Z3
 240           vaesenc       $rndkey,$inout1,$inout1
 241         vpxor           $Z1,$Z0,$Z0
 242         movbe           0x18($in0),%r13
 243           vaesenc       $rndkey,$inout2,$inout2
 244         movbe           0x10($in0),%r12
 245         vpalignr        \$8,$Z0,$Z0,$Ii         # 1st phase
 246         vpclmulqdq      \$0x10,$Hkey,$Z0,$Z0
 247         mov             %r13,0x60+8(%rsp)
 248           vaesenc       $rndkey,$inout3,$inout3
 249         mov             %r12,0x68+8(%rsp)
 250           vaesenc       $rndkey,$inout4,$inout4
 251           vmovups       0x80-0x80($key),$T1     # borrow $T1 for $rndkey
 252           vaesenc       $rndkey,$inout5,$inout5
 253
 254           vaesenc       $T1,$inout0,$inout0
 255           vmovups       0x90-0x80($key),$rndkey
 256           vaesenc       $T1,$inout1,$inout1
 257         vpsrldq         \$8,$Z2,$Z2
 258           vaesenc       $T1,$inout2,$inout2
 259         vpxor           $Z2,$Z3,$Z3
 260           vaesenc       $T1,$inout3,$inout3
 261         vpxor           $Ii,$Z0,$Z0
 262         movbe           0x08($in0),%r13
 263           vaesenc       $T1,$inout4,$inout4
 264         movbe           0x00($in0),%r12
 265           vaesenc       $T1,$inout5,$inout5
 266           vmovups       0xa0-0x80($key),$T1
 267           cmp           \$11,$rounds
 268           jb            .Lenc_tail              # 128-bit key
 269
 270           vaesenc       $rndkey,$inout0,$inout0
 271           vaesenc       $rndkey,$inout1,$inout1
 272           vaesenc       $rndkey,$inout2,$inout2
 273           vaesenc       $rndkey,$inout3,$inout3
 274           vaesenc       $rndkey,$inout4,$inout4
 275           vaesenc       $rndkey,$inout5,$inout5
 276
 277           vaesenc       $T1,$inout0,$inout0
 278           vaesenc       $T1,$inout1,$inout1
 279           vaesenc       $T1,$inout2,$inout2
 280           vaesenc       $T1,$inout3,$inout3
 281           vaesenc       $T1,$inout4,$inout4
 282           vmovups       0xb0-0x80($key),$rndkey
 283           vaesenc       $T1,$inout5,$inout5
 284           vmovups       0xc0-0x80($key),$T1
 285           je            .Lenc_tail              # 192-bit key
 286
 287           vaesenc       $rndkey,$inout0,$inout0
 288           vaesenc       $rndkey,$inout1,$inout1
 289           vaesenc       $rndkey,$inout2,$inout2
 290           vaesenc       $rndkey,$inout3,$inout3
 291           vaesenc       $rndkey,$inout4,$inout4
 292           vaesenc       $rndkey,$inout5,$inout5
 293
 294           vaesenc       $T1,$inout0,$inout0
 295           vaesenc       $T1,$inout1,$inout1
 296           vaesenc       $T1,$inout2,$inout2
 297           vaesenc       $T1,$inout3,$inout3
 298           vaesenc       $T1,$inout4,$inout4
 299           vmovups       0xd0-0x80($key),$rndkey
 300           vaesenc       $T1,$inout5,$inout5
 301           vmovups       0xe0-0x80($key),$T1
 302           jmp           .Lenc_tail              # 256-bit key
 303
 304 .align  32
 305 .Lhandle_ctr32:
 306         vmovdqu         ($const),$Ii            # borrow $Ii for .Lbswap_mask
 307           vpshufb       $Ii,$T1,$Z2             # byte-swap counter
 308           vmovdqu       0x30($const),$Z1        # borrow $Z1, .Ltwo_lsb
 309           vpaddd        0x40($const),$Z2,$inout1        # .Lone_lsb
 310           vpaddd        $Z1,$Z2,$inout2
 311         vmovdqu         0x00-0x20($Xip),$Hkey   # $Hkey^1
 312           vpaddd        $Z1,$inout1,$inout3
 313           vpshufb       $Ii,$inout1,$inout1
 314           vpaddd        $Z1,$inout2,$inout4
 315           vpshufb       $Ii,$inout2,$inout2
 316           vpxor         $rndkey,$inout1,$inout1
 317           vpaddd        $Z1,$inout3,$inout5
 318           vpshufb       $Ii,$inout3,$inout3
 319           vpxor         $rndkey,$inout2,$inout2
 320           vpaddd        $Z1,$inout4,$T1         # byte-swapped next counter value
 321           vpshufb       $Ii,$inout4,$inout4
 322           vpshufb       $Ii,$inout5,$inout5
 323           vpshufb       $Ii,$T1,$T1             # next counter value
 324         jmp             .Lresume_ctr32
 325
 326 .align  32
 327 .Lenc_tail:
 328           vaesenc       $rndkey,$inout0,$inout0
 329         vmovdqu         $Z3,16+8(%rsp)          # postpone vpxor $Z3,$Xi,$Xi
 330         vpalignr        \$8,$Z0,$Z0,$Xi         # 2nd phase
 331           vaesenc       $rndkey,$inout1,$inout1
 332         vpclmulqdq      \$0x10,$Hkey,$Z0,$Z0
 333           vpxor         0x00($inp),$T1,$T2
 334           vaesenc       $rndkey,$inout2,$inout2
 335           vpxor         0x10($inp),$T1,$Ii
 336           vaesenc       $rndkey,$inout3,$inout3
 337           vpxor         0x20($inp),$T1,$Z1
 338           vaesenc       $rndkey,$inout4,$inout4
 339           vpxor         0x30($inp),$T1,$Z2
 340           vaesenc       $rndkey,$inout5,$inout5
 341           vpxor         0x40($inp),$T1,$Z3
 342           vpxor         0x50($inp),$T1,$Hkey
 343           vmovdqu       ($ivp),$T1              # load next counter value
 344
 345           vaesenclast   $T2,$inout0,$inout0
 346           vmovdqu       0x20($const),$T2        # borrow $T2, .Lone_msb
 347           vaesenclast   $Ii,$inout1,$inout1
 348          vpaddb         $T2,$T1,$Ii
 349         mov             %r13,0x70+8(%rsp)
 350         lea             0x60($inp),$inp
 351           vaesenclast   $Z1,$inout2,$inout2
 352          vpaddb         $T2,$Ii,$Z1
 353         mov             %r12,0x78+8(%rsp)
 354         lea             0x60($out),$out
 355           vmovdqu       0x00-0x80($key),$rndkey
 356           vaesenclast   $Z2,$inout3,$inout3
 357          vpaddb         $T2,$Z1,$Z2
 358           vaesenclast   $Z3, $inout4,$inout4
 359          vpaddb         $T2,$Z2,$Z3
 360           vaesenclast   $Hkey,$inout5,$inout5
 361          vpaddb         $T2,$Z3,$Hkey
 362
 363         add             \$0x60,$ret
 364         sub             \$0x6,$len
 365         jc              .L6x_done
 366
 367           vmovups       $inout0,-0x60($out)     # save output
 368          vpxor          $rndkey,$T1,$inout0
 369           vmovups       $inout1,-0x50($out)
 370          vmovdqa        $Ii,$inout1             # 0 latency
 371           vmovups       $inout2,-0x40($out)
 372          vmovdqa        $Z1,$inout2             # 0 latency
 373           vmovups       $inout3,-0x30($out)
 374          vmovdqa        $Z2,$inout3             # 0 latency
 375           vmovups       $inout4,-0x20($out)
 376          vmovdqa        $Z3,$inout4             # 0 latency
 377           vmovups       $inout5,-0x10($out)
 378          vmovdqa        $Hkey,$inout5           # 0 latency
 379         vmovdqu         0x20+8(%rsp),$Z3        # I[5]
 380         jmp             .Loop6x
 381
 382 .L6x_done:
 383         vpxor           16+8(%rsp),$Xi,$Xi      # modulo-scheduled
 384         vpxor           $Z0,$Xi,$Xi             # modulo-scheduled
 385
 386         ret
 387 .size   _aesni_ctr32_ghash_6x,.-_aesni_ctr32_ghash_6x
 388 ___
 389 ######################################################################
 390 #
 391 # size_t aesni_gcm_[en|de]crypt(const void *inp, void *out, size_t len,
 392 #               const AES_KEY *key, unsigned char iv[16],
 393 #               struct { u128 Xi,H,Htbl[9]; } *Xip);
 394 $code.=<<___;
 395 .globl  aesni_gcm_decrypt
 396 .type   aesni_gcm_decrypt,\@function,6
 397 .align  32
 398 aesni_gcm_decrypt:
 399         xor     $ret,$ret
 400         cmp     \$0x60,$len                     # minimal accepted length
 401         jb      .Lgcm_dec_abort
 402
 403         lea     (%rsp),%rax                     # save stack pointer
 404         push    %rbx
 405         push    %rbp
 406         push    %r12
 407         push    %r13
 408         push    %r14
 409         push    %r15
 410 ___
 411 $code.=<<___ if ($win64);
 412         lea     -0xa8(%rsp),%rsp
 413         movaps  %xmm6,-0xd8(%rax)
 414         movaps  %xmm7,-0xc8(%rax)
 415         movaps  %xmm8,-0xb8(%rax)
 416         movaps  %xmm9,-0xa8(%rax)
 417         movaps  %xmm10,-0x98(%rax)
 418         movaps  %xmm11,-0x88(%rax)
 419         movaps  %xmm12,-0x78(%rax)
 420         movaps  %xmm13,-0x68(%rax)
 421         movaps  %xmm14,-0x58(%rax)
 422         movaps  %xmm15,-0x48(%rax)
 423 .Lgcm_dec_body:
 424 ___
 425 $code.=<<___;
 426         vzeroupper
 427
 428         vmovdqu         ($ivp),$T1              # input counter value
 429         add             \$-128,%rsp
 430         mov             12($ivp),$counter
 431         lea             .Lbswap_mask(%rip),$const
 432         lea             -0x80($key),$in0        # borrow $in0
 433         mov             \$0xf80,$end0           # borrow $end0
 434         vmovdqu         ($Xip),$Xi              # load Xi
 435         and             \$-128,%rsp             # ensure stack alignment
 436         vmovdqu         ($const),$Ii            # borrow $Ii for .Lbswap_mask
 437         lea             0x80($key),$key         # size optimization
 438         lea             0x20+0x20($Xip),$Xip    # size optimization
 439         mov             0xf0-0x80($key),$rounds
 440         vpshufb         $Ii,$Xi,$Xi
 441
 442         and             $end0,$in0
 443         and             %rsp,$end0
 444         sub             $in0,$end0
 445         jc              .Ldec_no_key_aliasing
 446         cmp             \$768,$end0
 447         jnc             .Ldec_no_key_aliasing
 448         sub             $end0,%rsp              # avoid aliasing with key
 449 .Ldec_no_key_aliasing:
 450
 451         vmovdqu         0x50($inp),$Z3          # I[5]
 452         lea             ($inp),$in0
 453         vmovdqu         0x40($inp),$Z0
 454         lea             -0xc0($inp,$len),$end0
 455         vmovdqu         0x30($inp),$Z1
 456         shr             \$4,$len
 457         xor             $ret,$ret
 458         vmovdqu         0x20($inp),$Z2
 459          vpshufb        $Ii,$Z3,$Z3             # passed to _aesni_ctr32_ghash_6x
 460         vmovdqu         0x10($inp),$T2
 461          vpshufb        $Ii,$Z0,$Z0
 462         vmovdqu         ($inp),$Hkey
 463          vpshufb        $Ii,$Z1,$Z1
 464         vmovdqu         $Z0,0x30(%rsp)
 465          vpshufb        $Ii,$Z2,$Z2
 466         vmovdqu         $Z1,0x40(%rsp)
 467          vpshufb        $Ii,$T2,$T2
 468         vmovdqu         $Z2,0x50(%rsp)
 469          vpshufb        $Ii,$Hkey,$Hkey
 470         vmovdqu         $T2,0x60(%rsp)
 471         vmovdqu         $Hkey,0x70(%rsp)
 472
 473         call            _aesni_ctr32_ghash_6x
 474
 475         vmovups         $inout0,-0x60($out)     # save output
 476         vmovups         $inout1,-0x50($out)
 477         vmovups         $inout2,-0x40($out)
 478         vmovups         $inout3,-0x30($out)
 479         vmovups         $inout4,-0x20($out)
 480         vmovups         $inout5,-0x10($out)
 481
 482         vpshufb         ($const),$Xi,$Xi        # .Lbswap_mask
 483         vmovdqu         $Xi,-0x40($Xip)         # output Xi
 484
 485         vzeroupper
 486 ___
 487 $code.=<<___ if ($win64);
 488         movaps  -0xd8(%rax),%xmm6
 489         movaps  -0xd8(%rax),%xmm7
 490         movaps  -0xb8(%rax),%xmm8
 491         movaps  -0xa8(%rax),%xmm9
 492         movaps  -0x98(%rax),%xmm10
 493         movaps  -0x88(%rax),%xmm11
 494         movaps  -0x78(%rax),%xmm12
 495         movaps  -0x68(%rax),%xmm13
 496         movaps  -0x58(%rax),%xmm14
 497         movaps  -0x48(%rax),%xmm15
 498 ___
 499 $code.=<<___;
 500         mov     -48(%rax),%r15
 501         mov     -40(%rax),%r14
 502         mov     -32(%rax),%r13
 503         mov     -24(%rax),%r12
 504         mov     -16(%rax),%rbp
 505         mov     -8(%rax),%rbx
 506         lea     (%rax),%rsp             # restore %rsp
 507 .Lgcm_dec_abort:
 508         mov     $ret,%rax               # return value
 509         ret
 510 .size   aesni_gcm_decrypt,.-aesni_gcm_decrypt
 511 ___
 512
 513 $code.=<<___;
 514 .type   _aesni_ctr32_6x,\@abi-omnipotent
 515 .align  32
 516 _aesni_ctr32_6x:
 517         vmovdqu         0x00-0x80($key),$Z0     # borrow $Z0 for $rndkey
 518         vmovdqu         0x20($const),$T2        # borrow $T2, .Lone_msb
 519         lea             -1($rounds),%r13
 520         vmovups         0x10-0x80($key),$rndkey
 521         lea             0x20-0x80($key),%r12
 522         vpxor           $Z0,$T1,$inout0
 523         add             \$6<<24,$counter
 524         jc              .Lhandle_ctr32_2
 525         vpaddb          $T2,$T1,$inout1
 526         vpaddb          $T2,$inout1,$inout2
 527         vpxor           $Z0,$inout1,$inout1
 528         vpaddb          $T2,$inout2,$inout3
 529         vpxor           $Z0,$inout2,$inout2
 530         vpaddb          $T2,$inout3,$inout4
 531         vpxor           $Z0,$inout3,$inout3
 532         vpaddb          $T2,$inout4,$inout5
 533         vpxor           $Z0,$inout4,$inout4
 534         vpaddb          $T2,$inout5,$T1
 535         vpxor           $Z0,$inout5,$inout5
 536         jmp             .Loop_ctr32
 537
 538 .align  16
 539 .Loop_ctr32:
 540         vaesenc         $rndkey,$inout0,$inout0
 541         vaesenc         $rndkey,$inout1,$inout1
 542         vaesenc         $rndkey,$inout2,$inout2
 543         vaesenc         $rndkey,$inout3,$inout3
 544         vaesenc         $rndkey,$inout4,$inout4
 545         vaesenc         $rndkey,$inout5,$inout5
 546         vmovups         (%r12),$rndkey
 547         lea             0x10(%r12),%r12
 548         dec             %r13d
 549         jnz             .Loop_ctr32
 550
 551         vmovdqu         (%r12),$Hkey            # last round key
 552         vaesenc         $rndkey,$inout0,$inout0
 553         vpxor           0x00($inp),$Hkey,$Z0
 554         vaesenc         $rndkey,$inout1,$inout1
 555         vpxor           0x10($inp),$Hkey,$Z1
 556         vaesenc         $rndkey,$inout2,$inout2
 557         vpxor           0x20($inp),$Hkey,$Z2
 558         vaesenc         $rndkey,$inout3,$inout3
 559         vpxor           0x30($inp),$Hkey,$Xi
 560         vaesenc         $rndkey,$inout4,$inout4
 561         vpxor           0x40($inp),$Hkey,$T2
 562         vaesenc         $rndkey,$inout5,$inout5
 563         vpxor           0x50($inp),$Hkey,$Hkey
 564         lea             0x60($inp),$inp
 565
 566         vaesenclast     $Z0,$inout0,$inout0
 567         vaesenclast     $Z1,$inout1,$inout1
 568         vaesenclast     $Z2,$inout2,$inout2
 569         vaesenclast     $Xi,$inout3,$inout3
 570         vaesenclast     $T2,$inout4,$inout4
 571         vaesenclast     $Hkey,$inout5,$inout5
 572         vmovups         $inout0,0x00($out)
 573         vmovups         $inout1,0x10($out)
 574         vmovups         $inout2,0x20($out)
 575         vmovups         $inout3,0x30($out)
 576         vmovups         $inout4,0x40($out)
 577         vmovups         $inout5,0x50($out)
 578         lea             0x60($out),$out
 579
 580         ret
 581 .align  32
 582 .Lhandle_ctr32_2:
 583         vpshufb         $Ii,$T1,$Z2             # byte-swap counter
 584         vmovdqu         0x30($const),$Z1        # borrow $Z1, .Ltwo_lsb
 585         vpaddd          0x40($const),$Z2,$inout1        # .Lone_lsb
 586         vpaddd          $Z1,$Z2,$inout2
 587         vpaddd          $Z1,$inout1,$inout3
 588         vpshufb         $Ii,$inout1,$inout1
 589         vpaddd          $Z1,$inout2,$inout4
 590         vpshufb         $Ii,$inout2,$inout2
 591         vpxor           $Z0,$inout1,$inout1
 592         vpaddd          $Z1,$inout3,$inout5
 593         vpshufb         $Ii,$inout3,$inout3
 594         vpxor           $Z0,$inout2,$inout2
 595         vpaddd          $Z1,$inout4,$T1         # byte-swapped next counter value
 596         vpshufb         $Ii,$inout4,$inout4
 597         vpxor           $Z0,$inout3,$inout3
 598         vpshufb         $Ii,$inout5,$inout5
 599         vpxor           $Z0,$inout4,$inout4
 600         vpshufb         $Ii,$T1,$T1             # next counter value
 601         vpxor           $Z0,$inout5,$inout5
 602         jmp     .Loop_ctr32
 603 .size   _aesni_ctr32_6x,.-_aesni_ctr32_6x
 604
 605 .globl  aesni_gcm_encrypt
 606 .type   aesni_gcm_encrypt,\@function,6
 607 .align  32
 608 aesni_gcm_encrypt:
 609         xor     $ret,$ret
 610         cmp     \$0x60*3,$len                   # minimal accepted length
 611         jb      .Lgcm_enc_abort
 612
 613         lea     (%rsp),%rax                     # save stack pointer
 614         push    %rbx
 615         push    %rbp
 616         push    %r12
 617         push    %r13
 618         push    %r14
 619         push    %r15
 620 ___
 621 $code.=<<___ if ($win64);
 622         lea     -0xa8(%rsp),%rsp
 623         movaps  %xmm6,-0xd8(%rax)
 624         movaps  %xmm7,-0xc8(%rax)
 625         movaps  %xmm8,-0xb8(%rax)
 626         movaps  %xmm9,-0xa8(%rax)
 627         movaps  %xmm10,-0x98(%rax)
 628         movaps  %xmm11,-0x88(%rax)
 629         movaps  %xmm12,-0x78(%rax)
 630         movaps  %xmm13,-0x68(%rax)
 631         movaps  %xmm14,-0x58(%rax)
 632         movaps  %xmm15,-0x48(%rax)
 633 .Lgcm_enc_body:
 634 ___
 635 $code.=<<___;
 636         vzeroupper
 637
 638         vmovdqu         ($ivp),$T1              # input counter value
 639         add             \$-128,%rsp
 640         mov             12($ivp),$counter
 641         lea             .Lbswap_mask(%rip),$const
 642         lea             -0x80($key),$in0        # borrow $in0
 643         mov             \$0xf80,$end0           # borrow $end0
 644         lea             0x80($key),$key         # size optimization
 645         vmovdqu         ($const),$Ii            # borrow $Ii for .Lbswap_mask
 646         and             \$-128,%rsp             # ensure stack alignment
 647         mov             0xf0-0x80($key),$rounds
 648
 649         and             $end0,$in0
 650         and             %rsp,$end0
 651         sub             $in0,$end0
 652         jc              .Lenc_no_key_aliasing
 653         cmp             \$768,$end0
 654         jnc             .Lenc_no_key_aliasing
 655         sub             $end0,%rsp              # avoid aliasing with key
 656 .Lenc_no_key_aliasing:
 657
 658         lea             ($out),$in0
 659         lea             -0xc0($out,$len),$end0
 660         shr             \$4,$len
 661
 662         call            _aesni_ctr32_6x
 663         vpshufb         $Ii,$inout0,$Xi         # save bswapped output on stack
 664         vpshufb         $Ii,$inout1,$T2
 665         vmovdqu         $Xi,0x70(%rsp)
 666         vpshufb         $Ii,$inout2,$Z0
 667         vmovdqu         $T2,0x60(%rsp)
 668         vpshufb         $Ii,$inout3,$Z1
 669         vmovdqu         $Z0,0x50(%rsp)
 670         vpshufb         $Ii,$inout4,$Z2
 671         vmovdqu         $Z1,0x40(%rsp)
 672         vpshufb         $Ii,$inout5,$Z3         # passed to _aesni_ctr32_ghash_6x
 673         vmovdqu         $Z2,0x30(%rsp)
 674
 675         call            _aesni_ctr32_6x
 676
 677         vmovdqu         ($Xip),$Xi              # load Xi
 678         lea             0x20+0x20($Xip),$Xip    # size optimization
 679         sub             \$12,$len
 680         mov             \$0x60*2,$ret
 681         vpshufb         $Ii,$Xi,$Xi
 682
 683         call            _aesni_ctr32_ghash_6x
 684         vmovdqu         0x20(%rsp),$Z3          # I[5]
 685          vmovdqu        ($const),$Ii            # borrow $Ii for .Lbswap_mask
 686         vmovdqu         0x00-0x20($Xip),$Hkey   # $Hkey^1
 687         vpunpckhqdq     $Z3,$Z3,$T1
 688         vmovdqu         0x20-0x20($Xip),$rndkey # borrow $rndkey for $HK
 689          vmovups        $inout0,-0x60($out)     # save output
 690          vpshufb        $Ii,$inout0,$inout0     # but keep bswapped copy
 691         vpxor           $Z3,$T1,$T1
 692          vmovups        $inout1,-0x50($out)
 693          vpshufb        $Ii,$inout1,$inout1
 694          vmovups        $inout2,-0x40($out)
 695          vpshufb        $Ii,$inout2,$inout2
 696          vmovups        $inout3,-0x30($out)
 697          vpshufb        $Ii,$inout3,$inout3
 698          vmovups        $inout4,-0x20($out)
 699          vpshufb        $Ii,$inout4,$inout4
 700          vmovups        $inout5,-0x10($out)
 701          vpshufb        $Ii,$inout5,$inout5
 702          vmovdqu        $inout0,0x10(%rsp)      # free $inout0
 703 ___
 704 { my ($HK,$T3)=($rndkey,$inout0);
 705
 706 $code.=<<___;
 707          vmovdqu        0x30(%rsp),$Z2          # I[4]
 708          vmovdqu        0x10-0x20($Xip),$Ii     # borrow $Ii for $Hkey^2
 709          vpunpckhqdq    $Z2,$Z2,$T2
 710         vpclmulqdq      \$0x00,$Hkey,$Z3,$Z1
 711          vpxor          $Z2,$T2,$T2
 712         vpclmulqdq      \$0x11,$Hkey,$Z3,$Z3
 713         vpclmulqdq      \$0x00,$HK,$T1,$T1
 714
 715          vmovdqu        0x40(%rsp),$T3          # I[3]
 716         vpclmulqdq      \$0x00,$Ii,$Z2,$Z0
 717          vmovdqu        0x30-0x20($Xip),$Hkey   # $Hkey^3
 718         vpxor           $Z1,$Z0,$Z0
 719          vpunpckhqdq    $T3,$T3,$Z1
 720         vpclmulqdq      \$0x11,$Ii,$Z2,$Z2
 721          vpxor          $T3,$Z1,$Z1
 722         vpxor           $Z3,$Z2,$Z2
 723         vpclmulqdq      \$0x10,$HK,$T2,$T2
 724          vmovdqu        0x50-0x20($Xip),$HK
 725         vpxor           $T1,$T2,$T2
 726
 727          vmovdqu        0x50(%rsp),$T1          # I[2]
 728         vpclmulqdq      \$0x00,$Hkey,$T3,$Z3
 729          vmovdqu        0x40-0x20($Xip),$Ii     # borrow $Ii for $Hkey^4
 730         vpxor           $Z0,$Z3,$Z3
 731          vpunpckhqdq    $T1,$T1,$Z0
 732         vpclmulqdq      \$0x11,$Hkey,$T3,$T3
 733          vpxor          $T1,$Z0,$Z0
 734         vpxor           $Z2,$T3,$T3
 735         vpclmulqdq      \$0x00,$HK,$Z1,$Z1
 736         vpxor           $T2,$Z1,$Z1
 737
 738          vmovdqu        0x60(%rsp),$T2          # I[1]
 739         vpclmulqdq      \$0x00,$Ii,$T1,$Z2
 740          vmovdqu        0x60-0x20($Xip),$Hkey   # $Hkey^5
 741         vpxor           $Z3,$Z2,$Z2
 742          vpunpckhqdq    $T2,$T2,$Z3
 743         vpclmulqdq      \$0x11,$Ii,$T1,$T1
 744          vpxor          $T2,$Z3,$Z3
 745         vpxor           $T3,$T1,$T1
 746         vpclmulqdq      \$0x10,$HK,$Z0,$Z0
 747          vmovdqu        0x80-0x20($Xip),$HK
 748         vpxor           $Z1,$Z0,$Z0
 749
 750          vpxor          0x70(%rsp),$Xi,$Xi      # accumulate I[0]
 751         vpclmulqdq      \$0x00,$Hkey,$T2,$Z1
 752          vmovdqu        0x70-0x20($Xip),$Ii     # borrow $Ii for $Hkey^6
 753          vpunpckhqdq    $Xi,$Xi,$T3
 754         vpxor           $Z2,$Z1,$Z1
 755         vpclmulqdq      \$0x11,$Hkey,$T2,$T2
 756          vpxor          $Xi,$T3,$T3
 757         vpxor           $T1,$T2,$T2
 758         vpclmulqdq      \$0x00,$HK,$Z3,$Z3
 759         vpxor           $Z0,$Z3,$Z0
 760
 761         vpclmulqdq      \$0x00,$Ii,$Xi,$Z2
 762          vmovdqu        0x00-0x20($Xip),$Hkey   # $Hkey^1
 763          vpunpckhqdq    $inout5,$inout5,$T1
 764         vpclmulqdq      \$0x11,$Ii,$Xi,$Xi
 765          vpxor          $inout5,$T1,$T1
 766         vpxor           $Z1,$Z2,$Z1
 767         vpclmulqdq      \$0x10,$HK,$T3,$T3
 768          vmovdqu        0x20-0x20($Xip),$HK
 769         vpxor           $T2,$Xi,$Z3
 770         vpxor           $Z0,$T3,$Z2
 771
 772          vmovdqu        0x10-0x20($Xip),$Ii     # borrow $Ii for $Hkey^2
 773           vpxor         $Z1,$Z3,$T3             # aggregated Karatsuba post-processing
 774         vpclmulqdq      \$0x00,$Hkey,$inout5,$Z0
 775           vpxor         $T3,$Z2,$Z2
 776          vpunpckhqdq    $inout4,$inout4,$T2
 777         vpclmulqdq      \$0x11,$Hkey,$inout5,$inout5
 778          vpxor          $inout4,$T2,$T2
 779           vpslldq       \$8,$Z2,$T3
 780         vpclmulqdq      \$0x00,$HK,$T1,$T1
 781           vpxor         $T3,$Z1,$Xi
 782           vpsrldq       \$8,$Z2,$Z2
 783           vpxor         $Z2,$Z3,$Z3
 784
 785         vpclmulqdq      \$0x00,$Ii,$inout4,$Z1
 786          vmovdqu        0x30-0x20($Xip),$Hkey   # $Hkey^3
 787         vpxor           $Z0,$Z1,$Z1
 788          vpunpckhqdq    $inout3,$inout3,$T3
 789         vpclmulqdq      \$0x11,$Ii,$inout4,$inout4
 790          vpxor          $inout3,$T3,$T3
 791         vpxor           $inout5,$inout4,$inout4
 792           vpalignr      \$8,$Xi,$Xi,$inout5     # 1st phase
 793         vpclmulqdq      \$0x10,$HK,$T2,$T2
 794          vmovdqu        0x50-0x20($Xip),$HK
 795         vpxor           $T1,$T2,$T2
 796
 797         vpclmulqdq      \$0x00,$Hkey,$inout3,$Z0
 798          vmovdqu        0x40-0x20($Xip),$Ii     # borrow $Ii for $Hkey^4
 799         vpxor           $Z1,$Z0,$Z0
 800          vpunpckhqdq    $inout2,$inout2,$T1
 801         vpclmulqdq      \$0x11,$Hkey,$inout3,$inout3
 802          vpxor          $inout2,$T1,$T1
 803         vpxor           $inout4,$inout3,$inout3
 804           vxorps        0x10(%rsp),$Z3,$Z3      # accumulate $inout0
 805         vpclmulqdq      \$0x00,$HK,$T3,$T3
 806         vpxor           $T2,$T3,$T3
 807
 808           vpclmulqdq    \$0x10,0x10($const),$Xi,$Xi
 809           vxorps        $inout5,$Xi,$Xi
 810
 811         vpclmulqdq      \$0x00,$Ii,$inout2,$Z1
 812          vmovdqu        0x60-0x20($Xip),$Hkey   # $Hkey^5
 813         vpxor           $Z0,$Z1,$Z1
 814          vpunpckhqdq    $inout1,$inout1,$T2
 815         vpclmulqdq      \$0x11,$Ii,$inout2,$inout2
 816          vpxor          $inout1,$T2,$T2
 817           vpalignr      \$8,$Xi,$Xi,$inout5     # 2nd phase
 818         vpxor           $inout3,$inout2,$inout2
 819         vpclmulqdq      \$0x10,$HK,$T1,$T1
 820          vmovdqu        0x80-0x20($Xip),$HK
 821         vpxor           $T3,$T1,$T1
 822
 823           vxorps        $Z3,$inout5,$inout5
 824           vpclmulqdq    \$0x10,0x10($const),$Xi,$Xi
 825           vxorps        $inout5,$Xi,$Xi
 826
 827         vpclmulqdq      \$0x00,$Hkey,$inout1,$Z0
 828          vmovdqu        0x70-0x20($Xip),$Ii     # borrow $Ii for $Hkey^6
 829         vpxor           $Z1,$Z0,$Z0
 830          vpunpckhqdq    $Xi,$Xi,$T3
 831         vpclmulqdq      \$0x11,$Hkey,$inout1,$inout1
 832          vpxor          $Xi,$T3,$T3
 833         vpxor           $inout2,$inout1,$inout1
 834         vpclmulqdq      \$0x00,$HK,$T2,$T2
 835         vpxor           $T1,$T2,$T2
 836
 837         vpclmulqdq      \$0x00,$Ii,$Xi,$Z1
 838         vpclmulqdq      \$0x11,$Ii,$Xi,$Z3
 839         vpxor           $Z0,$Z1,$Z1
 840         vpclmulqdq      \$0x10,$HK,$T3,$Z2
 841         vpxor           $inout1,$Z3,$Z3
 842         vpxor           $T2,$Z2,$Z2
 843
 844         vpxor           $Z1,$Z3,$Z0             # aggregated Karatsuba post-processing
 845         vpxor           $Z0,$Z2,$Z2
 846         vpslldq         \$8,$Z2,$T1
 847         vmovdqu         0x10($const),$Hkey      # .Lpoly
 848         vpsrldq         \$8,$Z2,$Z2
 849         vpxor           $T1,$Z1,$Xi
 850         vpxor           $Z2,$Z3,$Z3
 851
 852         vpalignr        \$8,$Xi,$Xi,$T2         # 1st phase
 853         vpclmulqdq      \$0x10,$Hkey,$Xi,$Xi
 854         vpxor           $T2,$Xi,$Xi
 855
 856         vpalignr        \$8,$Xi,$Xi,$T2         # 2nd phase
 857         vpclmulqdq      \$0x10,$Hkey,$Xi,$Xi
 858         vpxor           $Z3,$T2,$T2
 859         vpxor           $T2,$Xi,$Xi
 860 ___
 861 }
 862 $code.=<<___;
 863         vpshufb         ($const),$Xi,$Xi        # .Lbswap_mask
 864         vmovdqu         $Xi,-0x40($Xip)         # output Xi
 865
 866         vzeroupper
 867 ___
 868 $code.=<<___ if ($win64);
 869         movaps  -0xd8(%rax),%xmm6
 870         movaps  -0xc8(%rax),%xmm7
 871         movaps  -0xb8(%rax),%xmm8
 872         movaps  -0xa8(%rax),%xmm9
 873         movaps  -0x98(%rax),%xmm10
 874         movaps  -0x88(%rax),%xmm11
 875         movaps  -0x78(%rax),%xmm12
 876         movaps  -0x68(%rax),%xmm13
 877         movaps  -0x58(%rax),%xmm14
 878         movaps  -0x48(%rax),%xmm15
 879 ___
 880 $code.=<<___;
 881         mov     -48(%rax),%r15
 882         mov     -40(%rax),%r14
 883         mov     -32(%rax),%r13
 884         mov     -24(%rax),%r12
 885         mov     -16(%rax),%rbp
 886         mov     -8(%rax),%rbx
 887         lea     (%rax),%rsp             # restore %rsp
 888 .Lgcm_enc_abort:
 889         mov     $ret,%rax               # return value
 890         ret
 891 .size   aesni_gcm_encrypt,.-aesni_gcm_encrypt
 892 ___
 893
 894 $code.=<<___;
 895 .align  64
 896 .Lbswap_mask:
 897         .byte   15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
 898 .Lpoly:
 899         .byte   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xc2
 900 .Lone_msb:
 901         .byte   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1
 902 .Ltwo_lsb:
 903         .byte   2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 904 .Lone_lsb:
 905         .byte   1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 906 .asciz  "AES-NI GCM module for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
 907 .align  64
 908 ___
 909 if ($win64) {
 910 $rec="%rcx";
 911 $frame="%rdx";
 912 $context="%r8";
 913 $disp="%r9";
 914
 915 $code.=<<___
 916 .extern __imp_RtlVirtualUnwind
 917 .type   gcm_se_handler,\@abi-omnipotent
 918 .align  16
 919 gcm_se_handler:
 920         push    %rsi
 921         push    %rdi
 922         push    %rbx
 923         push    %rbp
 924         push    %r12
 925         push    %r13
 926         push    %r14
 927         push    %r15
 928         pushfq
 929         sub     \$64,%rsp
 930
 931         mov     120($context),%rax      # pull context->Rax
 932         mov     248($context),%rbx      # pull context->Rip
 933
 934         mov     8($disp),%rsi           # disp->ImageBase
 935         mov     56($disp),%r11          # disp->HandlerData
 936
 937         mov     0(%r11),%r10d           # HandlerData[0]
 938         lea     (%rsi,%r10),%r10        # prologue label
 939         cmp     %r10,%rbx               # context->Rip<prologue label
 940         jb      .Lcommon_seh_tail
 941
 942         mov     152($context),%rax      # pull context->Rsp
 943
 944         mov     4(%r11),%r10d           # HandlerData[1]
 945         lea     (%rsi,%r10),%r10        # epilogue label
 946         cmp     %r10,%rbx               # context->Rip>=epilogue label
 947         jae     .Lcommon_seh_tail
 948
 949         mov     120($context),%rax      # pull context->Rax
 950
 951         mov     -48(%rax),%r15
 952         mov     -40(%rax),%r14
 953         mov     -32(%rax),%r13
 954         mov     -24(%rax),%r12
 955         mov     -16(%rax),%rbp
 956         mov     -8(%rax),%rbx
 957         mov     %r15,240($context)
 958         mov     %r14,232($context)
 959         mov     %r13,224($context)
 960         mov     %r12,216($context)
 961         mov     %rbp,160($context)
 962         mov     %rbx,144($context)
 963
 964         lea     -0xd8(%rax),%rsi        # %xmm save area
 965         lea     512($context),%rdi      # & context.Xmm6
 966         mov     \$20,%ecx               # 10*sizeof(%xmm0)/sizeof(%rax)
 967         .long   0xa548f3fc              # cld; rep movsq
 968
 969 .Lcommon_seh_tail:
 970         mov     8(%rax),%rdi
 971         mov     16(%rax),%rsi
 972         mov     %rax,152($context)      # restore context->Rsp
 973         mov     %rsi,168($context)      # restore context->Rsi
 974         mov     %rdi,176($context)      # restore context->Rdi
 975
 976         mov     40($disp),%rdi          # disp->ContextRecord
 977         mov     $context,%rsi           # context
 978         mov     \$154,%ecx              # sizeof(CONTEXT)
 979         .long   0xa548f3fc              # cld; rep movsq
 980
 981         mov     $disp,%rsi
 982         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
 983         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
 984         mov     0(%rsi),%r8             # arg3, disp->ControlPc
 985         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
 986         mov     40(%rsi),%r10           # disp->ContextRecord
 987         lea     56(%rsi),%r11           # &disp->HandlerData
 988         lea     24(%rsi),%r12           # &disp->EstablisherFrame
 989         mov     %r10,32(%rsp)           # arg5
 990         mov     %r11,40(%rsp)           # arg6
 991         mov     %r12,48(%rsp)           # arg7
 992         mov     %rcx,56(%rsp)           # arg8, (NULL)
 993         call    *__imp_RtlVirtualUnwind(%rip)
 994
 995         mov     \$1,%eax                # ExceptionContinueSearch
 996         add     \$64,%rsp
 997         popfq
 998         pop     %r15
 999         pop     %r14
1000         pop     %r13
1001         pop     %r12
1002         pop     %rbp
1003         pop     %rbx
1004         pop     %rdi
1005         pop     %rsi
1006         ret
1007 .size   gcm_se_handler,.-gcm_se_handler
1008
1009 .section        .pdata
1010 .align  4
1011         .rva    .LSEH_begin_aesni_gcm_decrypt
1012         .rva    .LSEH_end_aesni_gcm_decrypt
1013         .rva    .LSEH_gcm_dec_info
1014
1015         .rva    .LSEH_begin_aesni_gcm_encrypt
1016         .rva    .LSEH_end_aesni_gcm_encrypt
1017         .rva    .LSEH_gcm_enc_info
1018 .section        .xdata
1019 .align  8
1020 .LSEH_gcm_dec_info:
1021         .byte   9,0,0,0
1022         .rva    gcm_se_handler
1023         .rva    .Lgcm_dec_body,.Lgcm_dec_abort
1024 .LSEH_gcm_enc_info:
1025         .byte   9,0,0,0
1026         .rva    gcm_se_handler
1027         .rva    .Lgcm_enc_body,.Lgcm_enc_abort
1028 ___
1029 }
1030 }}} else {{{
1031 $code=<<___;    # assembler is too old
1032 .text
1033
1034 .globl  aesni_gcm_encrypt
1035 .type   aesni_gcm_encrypt,\@abi-omnipotent
1036 aesni_gcm_encrypt:
1037         xor     %eax,%eax
1038         ret
1039 .size   aesni_gcm_encrypt,.-aesni_gcm_encrypt
1040
1041 .globl  aesni_gcm_decrypt
1042 .type   aesni_gcm_decrypt,\@abi-omnipotent
1043 aesni_gcm_decrypt:
1044         xor     %eax,%eax
1045         ret
1046 .size   aesni_gcm_decrypt,.-aesni_gcm_decrypt
1047 ___
1048 }}}
1049
1050 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
1051
1052 print $code;
1053
1054 close STDOUT;