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[thirdparty/openssl.git] / crypto / aes / asm / aesni-x86_64.pl

#! /usr/bin/env perl
# Copyright 2009-2020 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License").  You may not use
# this file except in compliance with the License.  You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html

#
# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see http://www.openssl.org/~appro/cryptogams/.
# ====================================================================
#
# This module implements support for Intel AES-NI extension. In
# OpenSSL context it's used with Intel engine, but can also be used as
# drop-in replacement for crypto/aes/asm/aes-x86_64.pl [see below for
# details].
#
# Performance.
#
# Given aes(enc|dec) instructions' latency asymptotic performance for
# non-parallelizable modes such as CBC encrypt is 3.75 cycles per byte
# processed with 128-bit key. And given their throughput asymptotic
# performance for parallelizable modes is 1.25 cycles per byte. Being
# asymptotic limit it's not something you commonly achieve in reality,
# but how close does one get? Below are results collected for
# different modes and block sized. Pairs of numbers are for en-/
# decryption.
#
#       16-byte     64-byte     256-byte    1-KB        8-KB
# ECB   4.25/4.25   1.38/1.38   1.28/1.28   1.26/1.26   1.26/1.26
# CTR   5.42/5.42   1.92/1.92   1.44/1.44   1.28/1.28   1.26/1.26
# CBC   4.38/4.43   4.15/1.43   4.07/1.32   4.07/1.29   4.06/1.28
# CCM   5.66/9.42   4.42/5.41   4.16/4.40   4.09/4.15   4.06/4.07
# OFB   5.42/5.42   4.64/4.64   4.44/4.44   4.39/4.39   4.38/4.38
# CFB   5.73/5.85   5.56/5.62   5.48/5.56   5.47/5.55   5.47/5.55
#
# ECB, CTR, CBC and CCM results are free from EVP overhead. This means
# that otherwise used 'openssl speed -evp aes-128-??? -engine aesni
# [-decrypt]' will exhibit 10-15% worse results for smaller blocks.
# The results were collected with specially crafted speed.c benchmark
# in order to compare them with results reported in "Intel Advanced
# Encryption Standard (AES) New Instruction Set" White Paper Revision
# 3.0 dated May 2010. All above results are consistently better. This
# module also provides better performance for block sizes smaller than
# 128 bytes in points *not* represented in the above table.
#
# Looking at the results for 8-KB buffer.
#
# CFB and OFB results are far from the limit, because implementation
# uses "generic" CRYPTO_[c|o]fb128_encrypt interfaces relying on
# single-block aesni_encrypt, which is not the most optimal way to go.
# CBC encrypt result is unexpectedly high and there is no documented
# explanation for it. Seemingly there is a small penalty for feeding
# the result back to AES unit the way it's done in CBC mode. There is
# nothing one can do and the result appears optimal. CCM result is
# identical to CBC, because CBC-MAC is essentially CBC encrypt without
# saving output. CCM CTR "stays invisible," because it's neatly
# interleaved with CBC-MAC. This provides ~30% improvement over
# "straightforward" CCM implementation with CTR and CBC-MAC performed
# disjointly. Parallelizable modes practically achieve the theoretical
# limit.
#
# Looking at how results vary with buffer size.
#
# Curves are practically saturated at 1-KB buffer size. In most cases
# "256-byte" performance is >95%, and "64-byte" is ~90% of "8-KB" one.
# CTR curve doesn't follow this pattern and is "slowest" changing one
# with "256-byte" result being 87% of "8-KB." This is because overhead
# in CTR mode is most computationally intensive. Small-block CCM
# decrypt is slower than encrypt, because first CTR and last CBC-MAC
# iterations can't be interleaved.
#
# Results for 192- and 256-bit keys.
#
# EVP-free results were observed to scale perfectly with number of
# rounds for larger block sizes, i.e. 192-bit result being 10/12 times
# lower and 256-bit one - 10/14. Well, in CBC encrypt case differences
# are a tad smaller, because the above mentioned penalty biases all
# results by same constant value. In similar way function call
# overhead affects small-block performance, as well as OFB and CFB
# results. Differences are not large, most common coefficients are
# 10/11.7 and 10/13.4 (as opposite to 10/12.0 and 10/14.0), but one
# observe even 10/11.2 and 10/12.4 (CTR, OFB, CFB)...

# January 2011
#
# While Westmere processor features 6 cycles latency for aes[enc|dec]
# instructions, which can be scheduled every second cycle, Sandy
# Bridge spends 8 cycles per instruction, but it can schedule them
# every cycle. This means that code targeting Westmere would perform
# suboptimally on Sandy Bridge. Therefore this update.
#
# In addition, non-parallelizable CBC encrypt (as well as CCM) is
# optimized. Relative improvement might appear modest, 8% on Westmere,
# but in absolute terms it's 3.77 cycles per byte encrypted with
# 128-bit key on Westmere, and 5.07 - on Sandy Bridge. These numbers
# should be compared to asymptotic limits of 3.75 for Westmere and
# 5.00 for Sandy Bridge. Actually, the fact that they get this close
# to asymptotic limits is quite amazing. Indeed, the limit is
# calculated as latency times number of rounds, 10 for 128-bit key,
# and divided by 16, the number of bytes in block, or in other words
# it accounts *solely* for aesenc instructions. But there are extra
# instructions, and numbers so close to the asymptotic limits mean
# that it's as if it takes as little as *one* additional cycle to
# execute all of them. How is it possible? It is possible thanks to
# out-of-order execution logic, which manages to overlap post-
# processing of previous block, things like saving the output, with
# actual encryption of current block, as well as pre-processing of
# current block, things like fetching input and xor-ing it with
# 0-round element of the key schedule, with actual encryption of
# previous block. Keep this in mind...
#
# For parallelizable modes, such as ECB, CBC decrypt, CTR, higher
# performance is achieved by interleaving instructions working on
# independent blocks. In which case asymptotic limit for such modes
# can be obtained by dividing above mentioned numbers by AES
# instructions' interleave factor. Westmere can execute at most 3
# instructions at a time, meaning that optimal interleave factor is 3,
# and that's where the "magic" number of 1.25 come from. "Optimal
# interleave factor" means that increase of interleave factor does
# not improve performance. The formula has proven to reflect reality
# pretty well on Westmere... Sandy Bridge on the other hand can
# execute up to 8 AES instructions at a time, so how does varying
# interleave factor affect the performance? Here is table for ECB
# (numbers are cycles per byte processed with 128-bit key):
#
# instruction interleave factor         3x      6x      8x
# theoretical asymptotic limit          1.67    0.83    0.625
# measured performance for 8KB block    1.05    0.86    0.84
#
# "as if" interleave factor             4.7x    5.8x    6.0x
#
# Further data for other parallelizable modes:
#
# CBC decrypt                           1.16    0.93    0.74
# CTR                                   1.14    0.91    0.74
#
# Well, given 3x column it's probably inappropriate to call the limit
# asymptotic, if it can be surpassed, isn't it? What happens there?
# Rewind to CBC paragraph for the answer. Yes, out-of-order execution
# magic is responsible for this. Processor overlaps not only the
# additional instructions with AES ones, but even AES instructions
# processing adjacent triplets of independent blocks. In the 6x case
# additional instructions  still claim disproportionally small amount
# of additional cycles, but in 8x case number of instructions must be
# a tad too high for out-of-order logic to cope with, and AES unit
# remains underutilized... As you can see 8x interleave is hardly
# justifiable, so there no need to feel bad that 32-bit aesni-x86.pl
# utilizes 6x interleave because of limited register bank capacity.
#
# Higher interleave factors do have negative impact on Westmere
# performance. While for ECB mode it's negligible ~1.5%, other
# parallelizables perform ~5% worse, which is outweighed by ~25%
# improvement on Sandy Bridge. To balance regression on Westmere
# CTR mode was implemented with 6x aesenc interleave factor.

# April 2011
#
# Add aesni_xts_[en|de]crypt. Westmere spends 1.25 cycles processing
# one byte out of 8KB with 128-bit key, Sandy Bridge - 0.90. Just like
# in CTR mode AES instruction interleave factor was chosen to be 6x.

# November 2015
#
# Add aesni_ocb_[en|de]crypt. AES instruction interleave factor was
# chosen to be 6x.

######################################################################
# Current large-block performance in cycles per byte processed with
# 128-bit key (less is better).
#
#               CBC en-/decrypt CTR     XTS     ECB     OCB
# Westmere      3.77/1.25       1.25    1.25    1.26
# * Bridge      5.07/0.74       0.75    0.90    0.85    0.98
# Haswell       4.44/0.63       0.63    0.73    0.63    0.70
# Skylake       2.62/0.63       0.63    0.63    0.63
# Silvermont    5.75/3.54       3.56    4.12    3.87(*) 4.11
# Knights L     2.54/0.77       0.78    0.85    -       1.50
# Goldmont      3.82/1.26       1.26    1.29    1.29    1.50
# Bulldozer     5.77/0.70       0.72    0.90    0.70    0.95
# Ryzen         2.71/0.35       0.35    0.44    0.38    0.49
#
# (*)   Atom Silvermont ECB result is suboptimal because of penalties
#       incurred by operations on %xmm8-15. As ECB is not considered
#       critical, nothing was done to mitigate the problem.

$PREFIX="aesni";        # if $PREFIX is set to "AES", the script
                        # generates drop-in replacement for
                        # crypto/aes/asm/aes-x86_64.pl:-)

# $output is the last argument if it looks like a file (it has an extension)
# $flavour is the first argument if it doesn't look like a file
$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;

$win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);

$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
die "can't locate x86_64-xlate.pl";

open OUT,"| \"$^X\" \"$xlate\" $flavour \"$output\""
    or die "can't call $xlate: $!";
*STDOUT=*OUT;

$movkey = $PREFIX eq "aesni" ? "movups" : "movups";
@_4args=$win64? ("%rcx","%rdx","%r8", "%r9") :  # Win64 order
                ("%rdi","%rsi","%rdx","%rcx");  # Unix order

$code=".text\n";
$code.=".extern OPENSSL_ia32cap_P\n";

$rounds="%eax"; # input to and changed by aesni_[en|de]cryptN !!!
# this is natural Unix argument order for public $PREFIX_[ecb|cbc]_encrypt ...
$inp="%rdi";
$out="%rsi";
$len="%rdx";
$key="%rcx";    # input to and changed by aesni_[en|de]cryptN !!!
$ivp="%r8";     # cbc, ctr, ...

$rnds_="%r10d"; # backup copy for $rounds
$key_="%r11";   # backup copy for $key

# %xmm register layout
$rndkey0="%xmm0";       $rndkey1="%xmm1";
$inout0="%xmm2";        $inout1="%xmm3";
$inout2="%xmm4";        $inout3="%xmm5";
$inout4="%xmm6";        $inout5="%xmm7";
$inout6="%xmm8";        $inout7="%xmm9";

$in2="%xmm6";           $in1="%xmm7";   # used in CBC decrypt, CTR, ...
$in0="%xmm8";           $iv="%xmm9";
\f
# Inline version of internal aesni_[en|de]crypt1.
#
# Why folded loop? Because aes[enc|dec] is slow enough to accommodate
# cycles which take care of loop variables...
{ my $sn;
sub aesni_generate1 {
my ($p,$key,$rounds,$inout,$ivec)=@_;   $inout=$inout0 if (!defined($inout));
++$sn;
$code.=<<___;
        $movkey ($key),$rndkey0
        $movkey 16($key),$rndkey1
___
$code.=<<___ if (defined($ivec));
        xorps   $rndkey0,$ivec
        lea     32($key),$key
        xorps   $ivec,$inout
___
$code.=<<___ if (!defined($ivec));
        lea     32($key),$key
        xorps   $rndkey0,$inout
___
$code.=<<___;
.Loop_${p}1_$sn:
        aes${p} $rndkey1,$inout
        dec     $rounds
        $movkey ($key),$rndkey1
        lea     16($key),$key
        jnz     .Loop_${p}1_$sn # loop body is 16 bytes
        aes${p}last     $rndkey1,$inout
___
}}
# void $PREFIX_[en|de]crypt (const void *inp,void *out,const AES_KEY *key);
#
{ my ($inp,$out,$key) = @_4args;

$code.=<<___;
.globl  ${PREFIX}_encrypt
.type   ${PREFIX}_encrypt,\@abi-omnipotent
.align  16
${PREFIX}_encrypt:
.cfi_startproc
        endbranch
        movups  ($inp),$inout0          # load input
        mov     240($key),$rounds       # key->rounds
___
        &aesni_generate1("enc",$key,$rounds);
$code.=<<___;
         pxor   $rndkey0,$rndkey0       # clear register bank
         pxor   $rndkey1,$rndkey1
        movups  $inout0,($out)          # output
         pxor   $inout0,$inout0
        ret
.cfi_endproc
.size   ${PREFIX}_encrypt,.-${PREFIX}_encrypt

.globl  ${PREFIX}_decrypt
.type   ${PREFIX}_decrypt,\@abi-omnipotent
.align  16
${PREFIX}_decrypt:
.cfi_startproc
        endbranch
        movups  ($inp),$inout0          # load input
        mov     240($key),$rounds       # key->rounds
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
         pxor   $rndkey0,$rndkey0       # clear register bank
         pxor   $rndkey1,$rndkey1
        movups  $inout0,($out)          # output
         pxor   $inout0,$inout0
        ret
.cfi_endproc
.size   ${PREFIX}_decrypt, .-${PREFIX}_decrypt
___
}
\f
# _aesni_[en|de]cryptN are private interfaces, N denotes interleave
# factor. Why 3x subroutine were originally used in loops? Even though
# aes[enc|dec] latency was originally 6, it could be scheduled only
# every *2nd* cycle. Thus 3x interleave was the one providing optimal
# utilization, i.e. when subroutine's throughput is virtually same as
# of non-interleaved subroutine [for number of input blocks up to 3].
# This is why it originally made no sense to implement 2x subroutine.
# But times change and it became appropriate to spend extra 192 bytes
# on 2x subroutine on Atom Silvermont account. For processors that
# can schedule aes[enc|dec] every cycle optimal interleave factor
# equals to corresponding instructions latency. 8x is optimal for
# * Bridge and "super-optimal" for other Intel CPUs...

sub aesni_generate2 {
my $dir=shift;
# As already mentioned it takes in $key and $rounds, which are *not*
# preserved. $inout[0-1] is cipher/clear text...
$code.=<<___;
.type   _aesni_${dir}rypt2,\@abi-omnipotent
.align  16
_aesni_${dir}rypt2:
.cfi_startproc
        $movkey ($key),$rndkey0
        shl     \$4,$rounds
        $movkey 16($key),$rndkey1
        xorps   $rndkey0,$inout0
        xorps   $rndkey0,$inout1
        $movkey 32($key),$rndkey0
        lea     32($key,$rounds),$key
        neg     %rax                            # $rounds
        add     \$16,%rax

.L${dir}_loop2:
        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax
        aes${dir}       $rndkey0,$inout0
        aes${dir}       $rndkey0,$inout1
        $movkey         -16($key,%rax),$rndkey0
        jnz             .L${dir}_loop2

        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}last   $rndkey0,$inout0
        aes${dir}last   $rndkey0,$inout1
        ret
.cfi_endproc
.size   _aesni_${dir}rypt2,.-_aesni_${dir}rypt2
___
}
sub aesni_generate3 {
my $dir=shift;
# As already mentioned it takes in $key and $rounds, which are *not*
# preserved. $inout[0-2] is cipher/clear text...
$code.=<<___;
.type   _aesni_${dir}rypt3,\@abi-omnipotent
.align  16
_aesni_${dir}rypt3:
.cfi_startproc
        $movkey ($key),$rndkey0
        shl     \$4,$rounds
        $movkey 16($key),$rndkey1
        xorps   $rndkey0,$inout0
        xorps   $rndkey0,$inout1
        xorps   $rndkey0,$inout2
        $movkey 32($key),$rndkey0
        lea     32($key,$rounds),$key
        neg     %rax                            # $rounds
        add     \$16,%rax

.L${dir}_loop3:
        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax
        aes${dir}       $rndkey0,$inout0
        aes${dir}       $rndkey0,$inout1
        aes${dir}       $rndkey0,$inout2
        $movkey         -16($key,%rax),$rndkey0
        jnz             .L${dir}_loop3

        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        aes${dir}last   $rndkey0,$inout0
        aes${dir}last   $rndkey0,$inout1
        aes${dir}last   $rndkey0,$inout2
        ret
.cfi_endproc
.size   _aesni_${dir}rypt3,.-_aesni_${dir}rypt3
___
}
# 4x interleave is implemented to improve small block performance,
# most notably [and naturally] 4 block by ~30%. One can argue that one
# should have implemented 5x as well, but improvement would be <20%,
# so it's not worth it...
sub aesni_generate4 {
my $dir=shift;
# As already mentioned it takes in $key and $rounds, which are *not*
# preserved. $inout[0-3] is cipher/clear text...
$code.=<<___;
.type   _aesni_${dir}rypt4,\@abi-omnipotent
.align  16
_aesni_${dir}rypt4:
.cfi_startproc
        $movkey ($key),$rndkey0
        shl     \$4,$rounds
        $movkey 16($key),$rndkey1
        xorps   $rndkey0,$inout0
        xorps   $rndkey0,$inout1
        xorps   $rndkey0,$inout2
        xorps   $rndkey0,$inout3
        $movkey 32($key),$rndkey0
        lea     32($key,$rounds),$key
        neg     %rax                            # $rounds
        .byte   0x0f,0x1f,0x00
        add     \$16,%rax

.L${dir}_loop4:
        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        aes${dir}       $rndkey1,$inout3
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax
        aes${dir}       $rndkey0,$inout0
        aes${dir}       $rndkey0,$inout1
        aes${dir}       $rndkey0,$inout2
        aes${dir}       $rndkey0,$inout3
        $movkey         -16($key,%rax),$rndkey0
        jnz             .L${dir}_loop4

        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        aes${dir}       $rndkey1,$inout3
        aes${dir}last   $rndkey0,$inout0
        aes${dir}last   $rndkey0,$inout1
        aes${dir}last   $rndkey0,$inout2
        aes${dir}last   $rndkey0,$inout3
        ret
.cfi_endproc
.size   _aesni_${dir}rypt4,.-_aesni_${dir}rypt4
___
}
sub aesni_generate6 {
my $dir=shift;
# As already mentioned it takes in $key and $rounds, which are *not*
# preserved. $inout[0-5] is cipher/clear text...
$code.=<<___;
.type   _aesni_${dir}rypt6,\@abi-omnipotent
.align  16
_aesni_${dir}rypt6:
.cfi_startproc
        $movkey         ($key),$rndkey0
        shl             \$4,$rounds
        $movkey         16($key),$rndkey1
        xorps           $rndkey0,$inout0
        pxor            $rndkey0,$inout1
        pxor            $rndkey0,$inout2
        aes${dir}       $rndkey1,$inout0
        lea             32($key,$rounds),$key
        neg             %rax                    # $rounds
        aes${dir}       $rndkey1,$inout1
        pxor            $rndkey0,$inout3
        pxor            $rndkey0,$inout4
        aes${dir}       $rndkey1,$inout2
        pxor            $rndkey0,$inout5
        $movkey         ($key,%rax),$rndkey0
        add             \$16,%rax
        jmp             .L${dir}_loop6_enter
.align  16
.L${dir}_loop6:
        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
.L${dir}_loop6_enter:
        aes${dir}       $rndkey1,$inout3
        aes${dir}       $rndkey1,$inout4
        aes${dir}       $rndkey1,$inout5
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax
        aes${dir}       $rndkey0,$inout0
        aes${dir}       $rndkey0,$inout1
        aes${dir}       $rndkey0,$inout2
        aes${dir}       $rndkey0,$inout3
        aes${dir}       $rndkey0,$inout4
        aes${dir}       $rndkey0,$inout5
        $movkey         -16($key,%rax),$rndkey0
        jnz             .L${dir}_loop6

        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        aes${dir}       $rndkey1,$inout3
        aes${dir}       $rndkey1,$inout4
        aes${dir}       $rndkey1,$inout5
        aes${dir}last   $rndkey0,$inout0
        aes${dir}last   $rndkey0,$inout1
        aes${dir}last   $rndkey0,$inout2
        aes${dir}last   $rndkey0,$inout3
        aes${dir}last   $rndkey0,$inout4
        aes${dir}last   $rndkey0,$inout5
        ret
.cfi_endproc
.size   _aesni_${dir}rypt6,.-_aesni_${dir}rypt6
___
}
sub aesni_generate8 {
my $dir=shift;
# As already mentioned it takes in $key and $rounds, which are *not*
# preserved. $inout[0-7] is cipher/clear text...
$code.=<<___;
.type   _aesni_${dir}rypt8,\@abi-omnipotent
.align  16
_aesni_${dir}rypt8:
.cfi_startproc
        $movkey         ($key),$rndkey0
        shl             \$4,$rounds
        $movkey         16($key),$rndkey1
        xorps           $rndkey0,$inout0
        xorps           $rndkey0,$inout1
        pxor            $rndkey0,$inout2
        pxor            $rndkey0,$inout3
        pxor            $rndkey0,$inout4
        lea             32($key,$rounds),$key
        neg             %rax                    # $rounds
        aes${dir}       $rndkey1,$inout0
        pxor            $rndkey0,$inout5
        pxor            $rndkey0,$inout6
        aes${dir}       $rndkey1,$inout1
        pxor            $rndkey0,$inout7
        $movkey         ($key,%rax),$rndkey0
        add             \$16,%rax
        jmp             .L${dir}_loop8_inner
.align  16
.L${dir}_loop8:
        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
.L${dir}_loop8_inner:
        aes${dir}       $rndkey1,$inout2
        aes${dir}       $rndkey1,$inout3
        aes${dir}       $rndkey1,$inout4
        aes${dir}       $rndkey1,$inout5
        aes${dir}       $rndkey1,$inout6
        aes${dir}       $rndkey1,$inout7
.L${dir}_loop8_enter:
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax
        aes${dir}       $rndkey0,$inout0
        aes${dir}       $rndkey0,$inout1
        aes${dir}       $rndkey0,$inout2
        aes${dir}       $rndkey0,$inout3
        aes${dir}       $rndkey0,$inout4
        aes${dir}       $rndkey0,$inout5
        aes${dir}       $rndkey0,$inout6
        aes${dir}       $rndkey0,$inout7
        $movkey         -16($key,%rax),$rndkey0
        jnz             .L${dir}_loop8

        aes${dir}       $rndkey1,$inout0
        aes${dir}       $rndkey1,$inout1
        aes${dir}       $rndkey1,$inout2
        aes${dir}       $rndkey1,$inout3
        aes${dir}       $rndkey1,$inout4
        aes${dir}       $rndkey1,$inout5
        aes${dir}       $rndkey1,$inout6
        aes${dir}       $rndkey1,$inout7
        aes${dir}last   $rndkey0,$inout0
        aes${dir}last   $rndkey0,$inout1
        aes${dir}last   $rndkey0,$inout2
        aes${dir}last   $rndkey0,$inout3
        aes${dir}last   $rndkey0,$inout4
        aes${dir}last   $rndkey0,$inout5
        aes${dir}last   $rndkey0,$inout6
        aes${dir}last   $rndkey0,$inout7
        ret
.cfi_endproc
.size   _aesni_${dir}rypt8,.-_aesni_${dir}rypt8
___
}
&aesni_generate2("enc") if ($PREFIX eq "aesni");
&aesni_generate2("dec");
&aesni_generate3("enc") if ($PREFIX eq "aesni");
&aesni_generate3("dec");
&aesni_generate4("enc") if ($PREFIX eq "aesni");
&aesni_generate4("dec");
&aesni_generate6("enc") if ($PREFIX eq "aesni");
&aesni_generate6("dec");
&aesni_generate8("enc") if ($PREFIX eq "aesni");
&aesni_generate8("dec");
\f
if ($PREFIX eq "aesni") {
########################################################################
# void aesni_ecb_encrypt (const void *in, void *out,
#                         size_t length, const AES_KEY *key,
#                         int enc);
$code.=<<___;
.globl  aesni_ecb_encrypt
.type   aesni_ecb_encrypt,\@function,5
.align  16
aesni_ecb_encrypt:
.cfi_startproc
        endbranch
___
$code.=<<___ if ($win64);
        lea     -0x58(%rsp),%rsp
        movaps  %xmm6,(%rsp)            # offload $inout4..7
        movaps  %xmm7,0x10(%rsp)
        movaps  %xmm8,0x20(%rsp)
        movaps  %xmm9,0x30(%rsp)
.Lecb_enc_body:
___
$code.=<<___;
        and     \$-16,$len              # if ($len<16)
        jz      .Lecb_ret               # return

        mov     240($key),$rounds       # key->rounds
        $movkey ($key),$rndkey0
        mov     $key,$key_              # backup $key
        mov     $rounds,$rnds_          # backup $rounds
        test    %r8d,%r8d               # 5th argument
        jz      .Lecb_decrypt
#--------------------------- ECB ENCRYPT ------------------------------#
        cmp     \$0x80,$len             # if ($len<8*16)
        jb      .Lecb_enc_tail          # short input

        movdqu  ($inp),$inout0          # load 8 input blocks
        movdqu  0x10($inp),$inout1
        movdqu  0x20($inp),$inout2
        movdqu  0x30($inp),$inout3
        movdqu  0x40($inp),$inout4
        movdqu  0x50($inp),$inout5
        movdqu  0x60($inp),$inout6
        movdqu  0x70($inp),$inout7
        lea     0x80($inp),$inp         # $inp+=8*16
        sub     \$0x80,$len             # $len-=8*16 (can be zero)
        jmp     .Lecb_enc_loop8_enter
.align 16
.Lecb_enc_loop8:
        movups  $inout0,($out)          # store 8 output blocks
        mov     $key_,$key              # restore $key
        movdqu  ($inp),$inout0          # load 8 input blocks
        mov     $rnds_,$rounds          # restore $rounds
        movups  $inout1,0x10($out)
        movdqu  0x10($inp),$inout1
        movups  $inout2,0x20($out)
        movdqu  0x20($inp),$inout2
        movups  $inout3,0x30($out)
        movdqu  0x30($inp),$inout3
        movups  $inout4,0x40($out)
        movdqu  0x40($inp),$inout4
        movups  $inout5,0x50($out)
        movdqu  0x50($inp),$inout5
        movups  $inout6,0x60($out)
        movdqu  0x60($inp),$inout6
        movups  $inout7,0x70($out)
        lea     0x80($out),$out         # $out+=8*16
        movdqu  0x70($inp),$inout7
        lea     0x80($inp),$inp         # $inp+=8*16
.Lecb_enc_loop8_enter:

        call    _aesni_encrypt8

        sub     \$0x80,$len
        jnc     .Lecb_enc_loop8         # loop if $len-=8*16 didn't borrow

        movups  $inout0,($out)          # store 8 output blocks
        mov     $key_,$key              # restore $key
        movups  $inout1,0x10($out)
        mov     $rnds_,$rounds          # restore $rounds
        movups  $inout2,0x20($out)
        movups  $inout3,0x30($out)
        movups  $inout4,0x40($out)
        movups  $inout5,0x50($out)
        movups  $inout6,0x60($out)
        movups  $inout7,0x70($out)
        lea     0x80($out),$out         # $out+=8*16
        add     \$0x80,$len             # restore real remaining $len
        jz      .Lecb_ret               # done if ($len==0)

.Lecb_enc_tail:                         # $len is less than 8*16
        movups  ($inp),$inout0
        cmp     \$0x20,$len
        jb      .Lecb_enc_one
        movups  0x10($inp),$inout1
        je      .Lecb_enc_two
        movups  0x20($inp),$inout2
        cmp     \$0x40,$len
        jb      .Lecb_enc_three
        movups  0x30($inp),$inout3
        je      .Lecb_enc_four
        movups  0x40($inp),$inout4
        cmp     \$0x60,$len
        jb      .Lecb_enc_five
        movups  0x50($inp),$inout5
        je      .Lecb_enc_six
        movdqu  0x60($inp),$inout6
        xorps   $inout7,$inout7
        call    _aesni_encrypt8
        movups  $inout0,($out)          # store 7 output blocks
        movups  $inout1,0x10($out)
        movups  $inout2,0x20($out)
        movups  $inout3,0x30($out)
        movups  $inout4,0x40($out)
        movups  $inout5,0x50($out)
        movups  $inout6,0x60($out)
        jmp     .Lecb_ret
.align  16
.Lecb_enc_one:
___
        &aesni_generate1("enc",$key,$rounds);
$code.=<<___;
        movups  $inout0,($out)          # store one output block
        jmp     .Lecb_ret
.align  16
.Lecb_enc_two:
        call    _aesni_encrypt2
        movups  $inout0,($out)          # store 2 output blocks
        movups  $inout1,0x10($out)
        jmp     .Lecb_ret
.align  16
.Lecb_enc_three:
        call    _aesni_encrypt3
        movups  $inout0,($out)          # store 3 output blocks
        movups  $inout1,0x10($out)
        movups  $inout2,0x20($out)
        jmp     .Lecb_ret
.align  16
.Lecb_enc_four:
        call    _aesni_encrypt4
        movups  $inout0,($out)          # store 4 output blocks
        movups  $inout1,0x10($out)
        movups  $inout2,0x20($out)
        movups  $inout3,0x30($out)
        jmp     .Lecb_ret
.align  16
.Lecb_enc_five:
        xorps   $inout5,$inout5
        call    _aesni_encrypt6
        movups  $inout0,($out)          # store 5 output blocks
        movups  $inout1,0x10($out)
        movups  $inout2,0x20($out)
        movups  $inout3,0x30($out)
        movups  $inout4,0x40($out)
        jmp     .Lecb_ret
.align  16
.Lecb_enc_six:
        call    _aesni_encrypt6
        movups  $inout0,($out)          # store 6 output blocks
        movups  $inout1,0x10($out)
        movups  $inout2,0x20($out)
        movups  $inout3,0x30($out)
        movups  $inout4,0x40($out)
        movups  $inout5,0x50($out)
        jmp     .Lecb_ret
\f#--------------------------- ECB DECRYPT ------------------------------#
.align  16
.Lecb_decrypt:
        cmp     \$0x80,$len             # if ($len<8*16)
        jb      .Lecb_dec_tail          # short input

        movdqu  ($inp),$inout0          # load 8 input blocks
        movdqu  0x10($inp),$inout1
        movdqu  0x20($inp),$inout2
        movdqu  0x30($inp),$inout3
        movdqu  0x40($inp),$inout4
        movdqu  0x50($inp),$inout5
        movdqu  0x60($inp),$inout6
        movdqu  0x70($inp),$inout7
        lea     0x80($inp),$inp         # $inp+=8*16
        sub     \$0x80,$len             # $len-=8*16 (can be zero)
        jmp     .Lecb_dec_loop8_enter
.align 16
.Lecb_dec_loop8:
        movups  $inout0,($out)          # store 8 output blocks
        mov     $key_,$key              # restore $key
        movdqu  ($inp),$inout0          # load 8 input blocks
        mov     $rnds_,$rounds          # restore $rounds
        movups  $inout1,0x10($out)
        movdqu  0x10($inp),$inout1
        movups  $inout2,0x20($out)
        movdqu  0x20($inp),$inout2
        movups  $inout3,0x30($out)
        movdqu  0x30($inp),$inout3
        movups  $inout4,0x40($out)
        movdqu  0x40($inp),$inout4
        movups  $inout5,0x50($out)
        movdqu  0x50($inp),$inout5
        movups  $inout6,0x60($out)
        movdqu  0x60($inp),$inout6
        movups  $inout7,0x70($out)
        lea     0x80($out),$out         # $out+=8*16
        movdqu  0x70($inp),$inout7
        lea     0x80($inp),$inp         # $inp+=8*16
.Lecb_dec_loop8_enter:

        call    _aesni_decrypt8

        $movkey ($key_),$rndkey0
        sub     \$0x80,$len
        jnc     .Lecb_dec_loop8         # loop if $len-=8*16 didn't borrow

        movups  $inout0,($out)          # store 8 output blocks
         pxor   $inout0,$inout0         # clear register bank
        mov     $key_,$key              # restore $key
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        mov     $rnds_,$rounds          # restore $rounds
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movups  $inout3,0x30($out)
         pxor   $inout3,$inout3
        movups  $inout4,0x40($out)
         pxor   $inout4,$inout4
        movups  $inout5,0x50($out)
         pxor   $inout5,$inout5
        movups  $inout6,0x60($out)
         pxor   $inout6,$inout6
        movups  $inout7,0x70($out)
         pxor   $inout7,$inout7
        lea     0x80($out),$out         # $out+=8*16
        add     \$0x80,$len             # restore real remaining $len
        jz      .Lecb_ret               # done if ($len==0)

.Lecb_dec_tail:
        movups  ($inp),$inout0
        cmp     \$0x20,$len
        jb      .Lecb_dec_one
        movups  0x10($inp),$inout1
        je      .Lecb_dec_two
        movups  0x20($inp),$inout2
        cmp     \$0x40,$len
        jb      .Lecb_dec_three
        movups  0x30($inp),$inout3
        je      .Lecb_dec_four
        movups  0x40($inp),$inout4
        cmp     \$0x60,$len
        jb      .Lecb_dec_five
        movups  0x50($inp),$inout5
        je      .Lecb_dec_six
        movups  0x60($inp),$inout6
        $movkey ($key),$rndkey0
        xorps   $inout7,$inout7
        call    _aesni_decrypt8
        movups  $inout0,($out)          # store 7 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movups  $inout3,0x30($out)
         pxor   $inout3,$inout3
        movups  $inout4,0x40($out)
         pxor   $inout4,$inout4
        movups  $inout5,0x50($out)
         pxor   $inout5,$inout5
        movups  $inout6,0x60($out)
         pxor   $inout6,$inout6
         pxor   $inout7,$inout7
        jmp     .Lecb_ret
.align  16
.Lecb_dec_one:
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
        movups  $inout0,($out)          # store one output block
         pxor   $inout0,$inout0         # clear register bank
        jmp     .Lecb_ret
.align  16
.Lecb_dec_two:
        call    _aesni_decrypt2
        movups  $inout0,($out)          # store 2 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        jmp     .Lecb_ret
.align  16
.Lecb_dec_three:
        call    _aesni_decrypt3
        movups  $inout0,($out)          # store 3 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        jmp     .Lecb_ret
.align  16
.Lecb_dec_four:
        call    _aesni_decrypt4
        movups  $inout0,($out)          # store 4 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movups  $inout3,0x30($out)
         pxor   $inout3,$inout3
        jmp     .Lecb_ret
.align  16
.Lecb_dec_five:
        xorps   $inout5,$inout5
        call    _aesni_decrypt6
        movups  $inout0,($out)          # store 5 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movups  $inout3,0x30($out)
         pxor   $inout3,$inout3
        movups  $inout4,0x40($out)
         pxor   $inout4,$inout4
         pxor   $inout5,$inout5
        jmp     .Lecb_ret
.align  16
.Lecb_dec_six:
        call    _aesni_decrypt6
        movups  $inout0,($out)          # store 6 output blocks
         pxor   $inout0,$inout0         # clear register bank
        movups  $inout1,0x10($out)
         pxor   $inout1,$inout1
        movups  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movups  $inout3,0x30($out)
         pxor   $inout3,$inout3
        movups  $inout4,0x40($out)
         pxor   $inout4,$inout4
        movups  $inout5,0x50($out)
         pxor   $inout5,$inout5

.Lecb_ret:
        xorps   $rndkey0,$rndkey0       # %xmm0
        pxor    $rndkey1,$rndkey1
___
$code.=<<___ if ($win64);
        movaps  (%rsp),%xmm6
        movaps  %xmm0,(%rsp)            # clear stack
        movaps  0x10(%rsp),%xmm7
        movaps  %xmm0,0x10(%rsp)
        movaps  0x20(%rsp),%xmm8
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm9
        movaps  %xmm0,0x30(%rsp)
        lea     0x58(%rsp),%rsp
.Lecb_enc_ret:
___
$code.=<<___;
        ret
.cfi_endproc
.size   aesni_ecb_encrypt,.-aesni_ecb_encrypt
___
\f
{
######################################################################
# void aesni_ccm64_[en|de]crypt_blocks (const void *in, void *out,
#                         size_t blocks, const AES_KEY *key,
#                         const char *ivec,char *cmac);
#
# Handles only complete blocks, operates on 64-bit counter and
# does not update *ivec! Nor does it finalize CMAC value
# (see engine/eng_aesni.c for details)
#
{
my $cmac="%r9"; # 6th argument

my $increment="%xmm9";
my $iv="%xmm6";
my $bswap_mask="%xmm7";

$code.=<<___;
.globl  aesni_ccm64_encrypt_blocks
.type   aesni_ccm64_encrypt_blocks,\@function,6
.align  16
aesni_ccm64_encrypt_blocks:
.cfi_startproc
        endbranch
___
$code.=<<___ if ($win64);
        lea     -0x58(%rsp),%rsp
        movaps  %xmm6,(%rsp)            # $iv
        movaps  %xmm7,0x10(%rsp)        # $bswap_mask
        movaps  %xmm8,0x20(%rsp)        # $in0
        movaps  %xmm9,0x30(%rsp)        # $increment
.Lccm64_enc_body:
___
$code.=<<___;
        mov     240($key),$rounds               # key->rounds
        movdqu  ($ivp),$iv
        movdqa  .Lincrement64(%rip),$increment
        movdqa  .Lbswap_mask(%rip),$bswap_mask

        shl     \$4,$rounds
        mov     \$16,$rnds_
        lea     0($key),$key_
        movdqu  ($cmac),$inout1
        movdqa  $iv,$inout0
        lea     32($key,$rounds),$key           # end of key schedule
        pshufb  $bswap_mask,$iv
        sub     %rax,%r10                       # twisted $rounds
        jmp     .Lccm64_enc_outer
.align  16
.Lccm64_enc_outer:
        $movkey ($key_),$rndkey0
        mov     %r10,%rax
        movups  ($inp),$in0                     # load inp

        xorps   $rndkey0,$inout0                # counter
        $movkey 16($key_),$rndkey1
        xorps   $in0,$rndkey0
        xorps   $rndkey0,$inout1                # cmac^=inp
        $movkey 32($key_),$rndkey0

.Lccm64_enc2_loop:
        aesenc  $rndkey1,$inout0
        aesenc  $rndkey1,$inout1
        $movkey ($key,%rax),$rndkey1
        add     \$32,%rax
        aesenc  $rndkey0,$inout0
        aesenc  $rndkey0,$inout1
        $movkey -16($key,%rax),$rndkey0
        jnz     .Lccm64_enc2_loop
        aesenc  $rndkey1,$inout0
        aesenc  $rndkey1,$inout1
        paddq   $increment,$iv
        dec     $len                            # $len-- ($len is in blocks)
        aesenclast      $rndkey0,$inout0
        aesenclast      $rndkey0,$inout1

        lea     16($inp),$inp
        xorps   $inout0,$in0                    # inp ^= E(iv)
        movdqa  $iv,$inout0
        movups  $in0,($out)                     # save output
        pshufb  $bswap_mask,$inout0
        lea     16($out),$out                   # $out+=16
        jnz     .Lccm64_enc_outer               # loop if ($len!=0)

         pxor   $rndkey0,$rndkey0               # clear register bank
         pxor   $rndkey1,$rndkey1
         pxor   $inout0,$inout0
        movups  $inout1,($cmac)                 # store resulting mac
         pxor   $inout1,$inout1
         pxor   $in0,$in0
         pxor   $iv,$iv
___
$code.=<<___ if ($win64);
        movaps  (%rsp),%xmm6
        movaps  %xmm0,(%rsp)                    # clear stack
        movaps  0x10(%rsp),%xmm7
        movaps  %xmm0,0x10(%rsp)
        movaps  0x20(%rsp),%xmm8
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm9
        movaps  %xmm0,0x30(%rsp)
        lea     0x58(%rsp),%rsp
.Lccm64_enc_ret:
___
$code.=<<___;
        ret
.cfi_endproc
.size   aesni_ccm64_encrypt_blocks,.-aesni_ccm64_encrypt_blocks
___
######################################################################
$code.=<<___;
.globl  aesni_ccm64_decrypt_blocks
.type   aesni_ccm64_decrypt_blocks,\@function,6
.align  16
aesni_ccm64_decrypt_blocks:
.cfi_startproc
        endbranch
___
$code.=<<___ if ($win64);
        lea     -0x58(%rsp),%rsp
        movaps  %xmm6,(%rsp)            # $iv
        movaps  %xmm7,0x10(%rsp)        # $bswap_mask
        movaps  %xmm8,0x20(%rsp)        # $in8
        movaps  %xmm9,0x30(%rsp)        # $increment
.Lccm64_dec_body:
___
$code.=<<___;
        mov     240($key),$rounds               # key->rounds
        movups  ($ivp),$iv
        movdqu  ($cmac),$inout1
        movdqa  .Lincrement64(%rip),$increment
        movdqa  .Lbswap_mask(%rip),$bswap_mask

        movaps  $iv,$inout0
        mov     $rounds,$rnds_
        mov     $key,$key_
        pshufb  $bswap_mask,$iv
___
        &aesni_generate1("enc",$key,$rounds);
$code.=<<___;
        shl     \$4,$rnds_
        mov     \$16,$rounds
        movups  ($inp),$in0                     # load inp
        paddq   $increment,$iv
        lea     16($inp),$inp                   # $inp+=16
        sub     %r10,%rax                       # twisted $rounds
        lea     32($key_,$rnds_),$key           # end of key schedule
        mov     %rax,%r10
        jmp     .Lccm64_dec_outer
.align  16
.Lccm64_dec_outer:
        xorps   $inout0,$in0                    # inp ^= E(iv)
        movdqa  $iv,$inout0
        movups  $in0,($out)                     # save output
        lea     16($out),$out                   # $out+=16
        pshufb  $bswap_mask,$inout0

        sub     \$1,$len                        # $len-- ($len is in blocks)
        jz      .Lccm64_dec_break               # if ($len==0) break

        $movkey ($key_),$rndkey0
        mov     %r10,%rax
        $movkey 16($key_),$rndkey1
        xorps   $rndkey0,$in0
        xorps   $rndkey0,$inout0
        xorps   $in0,$inout1                    # cmac^=out
        $movkey 32($key_),$rndkey0
        jmp     .Lccm64_dec2_loop
.align  16
.Lccm64_dec2_loop:
        aesenc  $rndkey1,$inout0
        aesenc  $rndkey1,$inout1
        $movkey ($key,%rax),$rndkey1
        add     \$32,%rax
        aesenc  $rndkey0,$inout0
        aesenc  $rndkey0,$inout1
        $movkey -16($key,%rax),$rndkey0
        jnz     .Lccm64_dec2_loop
        movups  ($inp),$in0                     # load input
        paddq   $increment,$iv
        aesenc  $rndkey1,$inout0
        aesenc  $rndkey1,$inout1
        aesenclast      $rndkey0,$inout0
        aesenclast      $rndkey0,$inout1
        lea     16($inp),$inp                   # $inp+=16
        jmp     .Lccm64_dec_outer

.align  16
.Lccm64_dec_break:
        #xorps  $in0,$inout1                    # cmac^=out
        mov     240($key_),$rounds
___
        &aesni_generate1("enc",$key_,$rounds,$inout1,$in0);
$code.=<<___;
         pxor   $rndkey0,$rndkey0               # clear register bank
         pxor   $rndkey1,$rndkey1
         pxor   $inout0,$inout0
        movups  $inout1,($cmac)                 # store resulting mac
         pxor   $inout1,$inout1
         pxor   $in0,$in0
         pxor   $iv,$iv
___
$code.=<<___ if ($win64);
        movaps  (%rsp),%xmm6
        movaps  %xmm0,(%rsp)                    # clear stack
        movaps  0x10(%rsp),%xmm7
        movaps  %xmm0,0x10(%rsp)
        movaps  0x20(%rsp),%xmm8
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm9
        movaps  %xmm0,0x30(%rsp)
        lea     0x58(%rsp),%rsp
.Lccm64_dec_ret:
___
$code.=<<___;
        ret
.cfi_endproc
.size   aesni_ccm64_decrypt_blocks,.-aesni_ccm64_decrypt_blocks
___
}\f
######################################################################
# void aesni_ctr32_encrypt_blocks (const void *in, void *out,
#                         size_t blocks, const AES_KEY *key,
#                         const char *ivec);
#
# Handles only complete blocks, operates on 32-bit counter and
# does not update *ivec! (see crypto/modes/ctr128.c for details)
#
# Overhaul based on suggestions from Shay Gueron and Vlad Krasnov,
# http://rt.openssl.org/Ticket/Display.html?id=3021&user=guest&pass=guest.
# Keywords are full unroll and modulo-schedule counter calculations
# with zero-round key xor.
{
my ($in0,$in1,$in2,$in3,$in4,$in5)=map("%xmm$_",(10..15));
my ($key0,$ctr)=("%ebp","${ivp}d");
my $frame_size = 0x80 + ($win64?160:0);

$code.=<<___;
.globl  aesni_ctr32_encrypt_blocks
.type   aesni_ctr32_encrypt_blocks,\@function,5
.align  16
aesni_ctr32_encrypt_blocks:
.cfi_startproc
        endbranch
        cmp     \$1,$len
        jne     .Lctr32_bulk

        # handle single block without allocating stack frame,
        # useful when handling edges
        movups  ($ivp),$inout0
        movups  ($inp),$inout1
        mov     240($key),%edx                  # key->rounds
___
        &aesni_generate1("enc",$key,"%edx");
$code.=<<___;
         pxor   $rndkey0,$rndkey0               # clear register bank
         pxor   $rndkey1,$rndkey1
        xorps   $inout1,$inout0
         pxor   $inout1,$inout1
        movups  $inout0,($out)
         xorps  $inout0,$inout0
        jmp     .Lctr32_epilogue

.align  16
.Lctr32_bulk:
        lea     (%rsp),$key_                    # use $key_ as frame pointer
.cfi_def_cfa_register   $key_
        push    %rbp
.cfi_push       %rbp
        sub     \$$frame_size,%rsp
        and     \$-16,%rsp      # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
        movaps  %xmm6,-0xa8($key_)              # offload everything
        movaps  %xmm7,-0x98($key_)
        movaps  %xmm8,-0x88($key_)
        movaps  %xmm9,-0x78($key_)
        movaps  %xmm10,-0x68($key_)
        movaps  %xmm11,-0x58($key_)
        movaps  %xmm12,-0x48($key_)
        movaps  %xmm13,-0x38($key_)
        movaps  %xmm14,-0x28($key_)
        movaps  %xmm15,-0x18($key_)
.Lctr32_body:
___
$code.=<<___;

        # 8 16-byte words on top of stack are counter values
        # xor-ed with zero-round key

        movdqu  ($ivp),$inout0
        movdqu  ($key),$rndkey0
        mov     12($ivp),$ctr                   # counter LSB
        pxor    $rndkey0,$inout0
        mov     12($key),$key0                  # 0-round key LSB
        movdqa  $inout0,0x00(%rsp)              # populate counter block
        bswap   $ctr
        movdqa  $inout0,$inout1
        movdqa  $inout0,$inout2
        movdqa  $inout0,$inout3
        movdqa  $inout0,0x40(%rsp)
        movdqa  $inout0,0x50(%rsp)
        movdqa  $inout0,0x60(%rsp)
        mov     %rdx,%r10                       # about to borrow %rdx
        movdqa  $inout0,0x70(%rsp)

        lea     1($ctr),%rax
         lea    2($ctr),%rdx
        bswap   %eax
         bswap  %edx
        xor     $key0,%eax
         xor    $key0,%edx
        pinsrd  \$3,%eax,$inout1
        lea     3($ctr),%rax
        movdqa  $inout1,0x10(%rsp)
         pinsrd \$3,%edx,$inout2
        bswap   %eax
         mov    %r10,%rdx                       # restore %rdx
         lea    4($ctr),%r10
         movdqa $inout2,0x20(%rsp)
        xor     $key0,%eax
         bswap  %r10d
        pinsrd  \$3,%eax,$inout3
         xor    $key0,%r10d
        movdqa  $inout3,0x30(%rsp)
        lea     5($ctr),%r9
         mov    %r10d,0x40+12(%rsp)
        bswap   %r9d
         lea    6($ctr),%r10
        mov     240($key),$rounds               # key->rounds
        xor     $key0,%r9d
         bswap  %r10d
        mov     %r9d,0x50+12(%rsp)
         xor    $key0,%r10d
        lea     7($ctr),%r9
         mov    %r10d,0x60+12(%rsp)
        bswap   %r9d
         mov    OPENSSL_ia32cap_P+4(%rip),%r10d
        xor     $key0,%r9d
         and    \$`1<<26|1<<22`,%r10d           # isolate XSAVE+MOVBE
        mov     %r9d,0x70+12(%rsp)

        $movkey 0x10($key),$rndkey1

        movdqa  0x40(%rsp),$inout4
        movdqa  0x50(%rsp),$inout5

        cmp     \$8,$len                # $len is in blocks
        jb      .Lctr32_tail            # short input if ($len<8)

        sub     \$6,$len                # $len is biased by -6
        cmp     \$`1<<22`,%r10d         # check for MOVBE without XSAVE
        je      .Lctr32_6x              # [which denotes Atom Silvermont]

        lea     0x80($key),$key         # size optimization
        sub     \$2,$len                # $len is biased by -8
        jmp     .Lctr32_loop8

.align  16
.Lctr32_6x:
        shl     \$4,$rounds
        mov     \$48,$rnds_
        bswap   $key0
        lea     32($key,$rounds),$key   # end of key schedule
        sub     %rax,%r10               # twisted $rounds
        jmp     .Lctr32_loop6

.align  16
.Lctr32_loop6:
         add    \$6,$ctr                # next counter value
        $movkey -48($key,$rnds_),$rndkey0
        aesenc  $rndkey1,$inout0
         mov    $ctr,%eax
         xor    $key0,%eax
        aesenc  $rndkey1,$inout1
         movbe  %eax,`0x00+12`(%rsp)    # store next counter value
         lea    1($ctr),%eax
        aesenc  $rndkey1,$inout2
         xor    $key0,%eax
         movbe  %eax,`0x10+12`(%rsp)
        aesenc  $rndkey1,$inout3
         lea    2($ctr),%eax
         xor    $key0,%eax
        aesenc  $rndkey1,$inout4
         movbe  %eax,`0x20+12`(%rsp)
         lea    3($ctr),%eax
        aesenc  $rndkey1,$inout5
        $movkey -32($key,$rnds_),$rndkey1
         xor    $key0,%eax

        aesenc  $rndkey0,$inout0
         movbe  %eax,`0x30+12`(%rsp)
         lea    4($ctr),%eax
        aesenc  $rndkey0,$inout1
         xor    $key0,%eax
         movbe  %eax,`0x40+12`(%rsp)
        aesenc  $rndkey0,$inout2
         lea    5($ctr),%eax
         xor    $key0,%eax
        aesenc  $rndkey0,$inout3
         movbe  %eax,`0x50+12`(%rsp)
         mov    %r10,%rax               # mov   $rnds_,$rounds
        aesenc  $rndkey0,$inout4
        aesenc  $rndkey0,$inout5
        $movkey -16($key,$rnds_),$rndkey0

        call    .Lenc_loop6

        movdqu  ($inp),$inout6          # load 6 input blocks
        movdqu  0x10($inp),$inout7
        movdqu  0x20($inp),$in0
        movdqu  0x30($inp),$in1
        movdqu  0x40($inp),$in2
        movdqu  0x50($inp),$in3
        lea     0x60($inp),$inp         # $inp+=6*16
        $movkey -64($key,$rnds_),$rndkey1
        pxor    $inout0,$inout6         # inp^=E(ctr)
        movaps  0x00(%rsp),$inout0      # load next counter [xor-ed with 0 round]
        pxor    $inout1,$inout7
        movaps  0x10(%rsp),$inout1
        pxor    $inout2,$in0
        movaps  0x20(%rsp),$inout2
        pxor    $inout3,$in1
        movaps  0x30(%rsp),$inout3
        pxor    $inout4,$in2
        movaps  0x40(%rsp),$inout4
        pxor    $inout5,$in3
        movaps  0x50(%rsp),$inout5
        movdqu  $inout6,($out)          # store 6 output blocks
        movdqu  $inout7,0x10($out)
        movdqu  $in0,0x20($out)
        movdqu  $in1,0x30($out)
        movdqu  $in2,0x40($out)
        movdqu  $in3,0x50($out)
        lea     0x60($out),$out         # $out+=6*16

        sub     \$6,$len
        jnc     .Lctr32_loop6           # loop if $len-=6 didn't borrow

        add     \$6,$len                # restore real remaining $len
        jz      .Lctr32_done            # done if ($len==0)

        lea     -48($rnds_),$rounds
        lea     -80($key,$rnds_),$key   # restore $key
        neg     $rounds
        shr     \$4,$rounds             # restore $rounds
        jmp     .Lctr32_tail

.align  32
.Lctr32_loop8:
         add            \$8,$ctr                # next counter value
        movdqa          0x60(%rsp),$inout6
        aesenc          $rndkey1,$inout0
         mov            $ctr,%r9d
        movdqa          0x70(%rsp),$inout7
        aesenc          $rndkey1,$inout1
         bswap          %r9d
        $movkey         0x20-0x80($key),$rndkey0
        aesenc          $rndkey1,$inout2
         xor            $key0,%r9d
         nop
        aesenc          $rndkey1,$inout3
         mov            %r9d,0x00+12(%rsp)      # store next counter value
         lea            1($ctr),%r9
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        aesenc          $rndkey1,$inout6
        aesenc          $rndkey1,$inout7
        $movkey         0x30-0x80($key),$rndkey1
___
for($i=2;$i<8;$i++) {
my $rndkeyx = ($i&1)?$rndkey1:$rndkey0;
$code.=<<___;
         bswap          %r9d
        aesenc          $rndkeyx,$inout0
        aesenc          $rndkeyx,$inout1
         xor            $key0,%r9d
         .byte          0x66,0x90
        aesenc          $rndkeyx,$inout2
        aesenc          $rndkeyx,$inout3
         mov            %r9d,`0x10*($i-1)`+12(%rsp)
         lea            $i($ctr),%r9
        aesenc          $rndkeyx,$inout4
        aesenc          $rndkeyx,$inout5
        aesenc          $rndkeyx,$inout6
        aesenc          $rndkeyx,$inout7
        $movkey         `0x20+0x10*$i`-0x80($key),$rndkeyx
___
}
$code.=<<___;
         bswap          %r9d
        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
         xor            $key0,%r9d
         movdqu         0x00($inp),$in0         # start loading input
        aesenc          $rndkey0,$inout3
         mov            %r9d,0x70+12(%rsp)
         cmp            \$11,$rounds
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        aesenc          $rndkey0,$inout6
        aesenc          $rndkey0,$inout7
        $movkey         0xa0-0x80($key),$rndkey0

        jb              .Lctr32_enc_done

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        aesenc          $rndkey1,$inout6
        aesenc          $rndkey1,$inout7
        $movkey         0xb0-0x80($key),$rndkey1

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        aesenc          $rndkey0,$inout6
        aesenc          $rndkey0,$inout7
        $movkey         0xc0-0x80($key),$rndkey0
        je              .Lctr32_enc_done

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        aesenc          $rndkey1,$inout6
        aesenc          $rndkey1,$inout7
        $movkey         0xd0-0x80($key),$rndkey1

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        aesenc          $rndkey0,$inout6
        aesenc          $rndkey0,$inout7
        $movkey         0xe0-0x80($key),$rndkey0
        jmp             .Lctr32_enc_done

.align  16
.Lctr32_enc_done:
        movdqu          0x10($inp),$in1
        pxor            $rndkey0,$in0           # input^=round[last]
        movdqu          0x20($inp),$in2
        pxor            $rndkey0,$in1
        movdqu          0x30($inp),$in3
        pxor            $rndkey0,$in2
        movdqu          0x40($inp),$in4
        pxor            $rndkey0,$in3
        movdqu          0x50($inp),$in5
        pxor            $rndkey0,$in4
        pxor            $rndkey0,$in5
        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        aesenc          $rndkey1,$inout6
        aesenc          $rndkey1,$inout7
        movdqu          0x60($inp),$rndkey1     # borrow $rndkey1 for inp[6]
        lea             0x80($inp),$inp         # $inp+=8*16

        aesenclast      $in0,$inout0            # $inN is inp[N]^round[last]
        pxor            $rndkey0,$rndkey1       # borrowed $rndkey
        movdqu          0x70-0x80($inp),$in0
        aesenclast      $in1,$inout1
        pxor            $rndkey0,$in0
        movdqa          0x00(%rsp),$in1         # load next counter block
        aesenclast      $in2,$inout2
        aesenclast      $in3,$inout3
        movdqa          0x10(%rsp),$in2
        movdqa          0x20(%rsp),$in3
        aesenclast      $in4,$inout4
        aesenclast      $in5,$inout5
        movdqa          0x30(%rsp),$in4
        movdqa          0x40(%rsp),$in5
        aesenclast      $rndkey1,$inout6
        movdqa          0x50(%rsp),$rndkey0
        $movkey         0x10-0x80($key),$rndkey1#real 1st-round key
        aesenclast      $in0,$inout7

        movups          $inout0,($out)          # store 8 output blocks
        movdqa          $in1,$inout0
        movups          $inout1,0x10($out)
        movdqa          $in2,$inout1
        movups          $inout2,0x20($out)
        movdqa          $in3,$inout2
        movups          $inout3,0x30($out)
        movdqa          $in4,$inout3
        movups          $inout4,0x40($out)
        movdqa          $in5,$inout4
        movups          $inout5,0x50($out)
        movdqa          $rndkey0,$inout5
        movups          $inout6,0x60($out)
        movups          $inout7,0x70($out)
        lea             0x80($out),$out         # $out+=8*16

        sub     \$8,$len
        jnc     .Lctr32_loop8                   # loop if $len-=8 didn't borrow

        add     \$8,$len                        # restore real remaining $len
        jz      .Lctr32_done                    # done if ($len==0)
        lea     -0x80($key),$key

.Lctr32_tail:
        # note that at this point $inout0..5 are populated with
        # counter values xor-ed with 0-round key
        lea     16($key),$key
        cmp     \$4,$len
        jb      .Lctr32_loop3
        je      .Lctr32_loop4

        # if ($len>4) compute 7 E(counter)
        shl             \$4,$rounds
        movdqa          0x60(%rsp),$inout6
        pxor            $inout7,$inout7

        $movkey         16($key),$rndkey0
        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        lea             32-16($key,$rounds),$key# prepare for .Lenc_loop8_enter
        neg             %rax
        aesenc          $rndkey1,$inout2
        add             \$16,%rax               # prepare for .Lenc_loop8_enter
         movups         ($inp),$in0
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
         movups         0x10($inp),$in1         # pre-load input
         movups         0x20($inp),$in2
        aesenc          $rndkey1,$inout5
        aesenc          $rndkey1,$inout6

        call            .Lenc_loop8_enter

        movdqu  0x30($inp),$in3
        pxor    $in0,$inout0
        movdqu  0x40($inp),$in0
        pxor    $in1,$inout1
        movdqu  $inout0,($out)                  # store output
        pxor    $in2,$inout2
        movdqu  $inout1,0x10($out)
        pxor    $in3,$inout3
        movdqu  $inout2,0x20($out)
        pxor    $in0,$inout4
        movdqu  $inout3,0x30($out)
        movdqu  $inout4,0x40($out)
        cmp     \$6,$len
        jb      .Lctr32_done                    # $len was 5, stop store

        movups  0x50($inp),$in1
        xorps   $in1,$inout5
        movups  $inout5,0x50($out)
        je      .Lctr32_done                    # $len was 6, stop store

        movups  0x60($inp),$in2
        xorps   $in2,$inout6
        movups  $inout6,0x60($out)
        jmp     .Lctr32_done                    # $len was 7, stop store

.align  32
.Lctr32_loop4:
        aesenc          $rndkey1,$inout0
        lea             16($key),$key
        dec             $rounds
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        $movkey         ($key),$rndkey1
        jnz             .Lctr32_loop4
        aesenclast      $rndkey1,$inout0
        aesenclast      $rndkey1,$inout1
         movups         ($inp),$in0             # load input
         movups         0x10($inp),$in1
        aesenclast      $rndkey1,$inout2
        aesenclast      $rndkey1,$inout3
         movups         0x20($inp),$in2
         movups         0x30($inp),$in3

        xorps   $in0,$inout0
        movups  $inout0,($out)                  # store output
        xorps   $in1,$inout1
        movups  $inout1,0x10($out)
        pxor    $in2,$inout2
        movdqu  $inout2,0x20($out)
        pxor    $in3,$inout3
        movdqu  $inout3,0x30($out)
        jmp     .Lctr32_done                    # $len was 4, stop store

.align  32
.Lctr32_loop3:
        aesenc          $rndkey1,$inout0
        lea             16($key),$key
        dec             $rounds
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        $movkey         ($key),$rndkey1
        jnz             .Lctr32_loop3
        aesenclast      $rndkey1,$inout0
        aesenclast      $rndkey1,$inout1
        aesenclast      $rndkey1,$inout2

        movups  ($inp),$in0                     # load input
        xorps   $in0,$inout0
        movups  $inout0,($out)                  # store output
        cmp     \$2,$len
        jb      .Lctr32_done                    # $len was 1, stop store

        movups  0x10($inp),$in1
        xorps   $in1,$inout1
        movups  $inout1,0x10($out)
        je      .Lctr32_done                    # $len was 2, stop store

        movups  0x20($inp),$in2
        xorps   $in2,$inout2
        movups  $inout2,0x20($out)              # $len was 3, stop store

.Lctr32_done:
        xorps   %xmm0,%xmm0                     # clear register bank
        xor     $key0,$key0
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
___
$code.=<<___ if (!$win64);
        pxor    %xmm6,%xmm6
        pxor    %xmm7,%xmm7
        movaps  %xmm0,0x00(%rsp)                # clear stack
        pxor    %xmm8,%xmm8
        movaps  %xmm0,0x10(%rsp)
        pxor    %xmm9,%xmm9
        movaps  %xmm0,0x20(%rsp)
        pxor    %xmm10,%xmm10
        movaps  %xmm0,0x30(%rsp)
        pxor    %xmm11,%xmm11
        movaps  %xmm0,0x40(%rsp)
        pxor    %xmm12,%xmm12
        movaps  %xmm0,0x50(%rsp)
        pxor    %xmm13,%xmm13
        movaps  %xmm0,0x60(%rsp)
        pxor    %xmm14,%xmm14
        movaps  %xmm0,0x70(%rsp)
        pxor    %xmm15,%xmm15
___
$code.=<<___ if ($win64);
        movaps  -0xa8($key_),%xmm6
        movaps  %xmm0,-0xa8($key_)              # clear stack
        movaps  -0x98($key_),%xmm7
        movaps  %xmm0,-0x98($key_)
        movaps  -0x88($key_),%xmm8
        movaps  %xmm0,-0x88($key_)
        movaps  -0x78($key_),%xmm9
        movaps  %xmm0,-0x78($key_)
        movaps  -0x68($key_),%xmm10
        movaps  %xmm0,-0x68($key_)
        movaps  -0x58($key_),%xmm11
        movaps  %xmm0,-0x58($key_)
        movaps  -0x48($key_),%xmm12
        movaps  %xmm0,-0x48($key_)
        movaps  -0x38($key_),%xmm13
        movaps  %xmm0,-0x38($key_)
        movaps  -0x28($key_),%xmm14
        movaps  %xmm0,-0x28($key_)
        movaps  -0x18($key_),%xmm15
        movaps  %xmm0,-0x18($key_)
        movaps  %xmm0,0x00(%rsp)
        movaps  %xmm0,0x10(%rsp)
        movaps  %xmm0,0x20(%rsp)
        movaps  %xmm0,0x30(%rsp)
        movaps  %xmm0,0x40(%rsp)
        movaps  %xmm0,0x50(%rsp)
        movaps  %xmm0,0x60(%rsp)
        movaps  %xmm0,0x70(%rsp)
___
$code.=<<___;
        mov     -8($key_),%rbp
.cfi_restore    %rbp
        lea     ($key_),%rsp
.cfi_def_cfa_register   %rsp
.Lctr32_epilogue:
        ret
.cfi_endproc
.size   aesni_ctr32_encrypt_blocks,.-aesni_ctr32_encrypt_blocks
___
}
\f
######################################################################
# void aesni_xts_[en|de]crypt(const char *inp,char *out,size_t len,
#       const AES_KEY *key1, const AES_KEY *key2
#       const unsigned char iv[16]);
#
{
my @tweak=map("%xmm$_",(10..15));
my ($twmask,$twres,$twtmp)=("%xmm8","%xmm9",@tweak[4]);
my ($key2,$ivp,$len_)=("%r8","%r9","%r9");
my $frame_size = 0x70 + ($win64?160:0);
my $key_ = "%rbp";      # override so that we can use %r11 as FP

$code.=<<___;
.globl  aesni_xts_encrypt
.type   aesni_xts_encrypt,\@function,6
.align  16
aesni_xts_encrypt:
.cfi_startproc
        endbranch
        lea     (%rsp),%r11                     # frame pointer
.cfi_def_cfa_register   %r11
        push    %rbp
.cfi_push       %rbp
        sub     \$$frame_size,%rsp
        and     \$-16,%rsp      # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
        movaps  %xmm6,-0xa8(%r11)               # offload everything
        movaps  %xmm7,-0x98(%r11)
        movaps  %xmm8,-0x88(%r11)
        movaps  %xmm9,-0x78(%r11)
        movaps  %xmm10,-0x68(%r11)
        movaps  %xmm11,-0x58(%r11)
        movaps  %xmm12,-0x48(%r11)
        movaps  %xmm13,-0x38(%r11)
        movaps  %xmm14,-0x28(%r11)
        movaps  %xmm15,-0x18(%r11)
.Lxts_enc_body:
___
$code.=<<___;
        movups  ($ivp),$inout0                  # load clear-text tweak
        mov     240(%r8),$rounds                # key2->rounds
        mov     240($key),$rnds_                # key1->rounds
___
        # generate the tweak
        &aesni_generate1("enc",$key2,$rounds,$inout0);
$code.=<<___;
        $movkey ($key),$rndkey0                 # zero round key
        mov     $key,$key_                      # backup $key
        mov     $rnds_,$rounds                  # backup $rounds
        shl     \$4,$rnds_
        mov     $len,$len_                      # backup $len
        and     \$-16,$len

        $movkey 16($key,$rnds_),$rndkey1        # last round key

        movdqa  .Lxts_magic(%rip),$twmask
        movdqa  $inout0,@tweak[5]
        pshufd  \$0x5f,$inout0,$twres
        pxor    $rndkey0,$rndkey1
___
    # alternative tweak calculation algorithm is based on suggestions
    # by Shay Gueron. psrad doesn't conflict with AES-NI instructions
    # and should help in the future...
    for ($i=0;$i<4;$i++) {
    $code.=<<___;
        movdqa  $twres,$twtmp
        paddd   $twres,$twres
        movdqa  @tweak[5],@tweak[$i]
        psrad   \$31,$twtmp                     # broadcast upper bits
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
        pxor    $rndkey0,@tweak[$i]
        pxor    $twtmp,@tweak[5]
___
    }
$code.=<<___;
        movdqa  @tweak[5],@tweak[4]
        psrad   \$31,$twres
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twres
        pxor    $rndkey0,@tweak[4]
        pxor    $twres,@tweak[5]
        movaps  $rndkey1,0x60(%rsp)             # save round[0]^round[last]

        sub     \$16*6,$len
        jc      .Lxts_enc_short                 # if $len-=6*16 borrowed

        mov     \$16+96,$rounds
        lea     32($key_,$rnds_),$key           # end of key schedule
        sub     %r10,%rax                       # twisted $rounds
        $movkey 16($key_),$rndkey1
        mov     %rax,%r10                       # backup twisted $rounds
        lea     .Lxts_magic(%rip),%r8
        jmp     .Lxts_enc_grandloop

.align  32
.Lxts_enc_grandloop:
        movdqu  `16*0`($inp),$inout0            # load input
        movdqa  $rndkey0,$twmask
        movdqu  `16*1`($inp),$inout1
        pxor    @tweak[0],$inout0               # input^=tweak^round[0]
        movdqu  `16*2`($inp),$inout2
        pxor    @tweak[1],$inout1
         aesenc         $rndkey1,$inout0
        movdqu  `16*3`($inp),$inout3
        pxor    @tweak[2],$inout2
         aesenc         $rndkey1,$inout1
        movdqu  `16*4`($inp),$inout4
        pxor    @tweak[3],$inout3
         aesenc         $rndkey1,$inout2
        movdqu  `16*5`($inp),$inout5
        pxor    @tweak[5],$twmask               # round[0]^=tweak[5]
         movdqa 0x60(%rsp),$twres               # load round[0]^round[last]
        pxor    @tweak[4],$inout4
         aesenc         $rndkey1,$inout3
        $movkey 32($key_),$rndkey0
        lea     `16*6`($inp),$inp
        pxor    $twmask,$inout5

         pxor   $twres,@tweak[0]                # calculate tweaks^round[last]
        aesenc          $rndkey1,$inout4
         pxor   $twres,@tweak[1]
         movdqa @tweak[0],`16*0`(%rsp)          # put aside tweaks^round[last]
        aesenc          $rndkey1,$inout5
        $movkey         48($key_),$rndkey1
         pxor   $twres,@tweak[2]

        aesenc          $rndkey0,$inout0
         pxor   $twres,@tweak[3]
         movdqa @tweak[1],`16*1`(%rsp)
        aesenc          $rndkey0,$inout1
         pxor   $twres,@tweak[4]
         movdqa @tweak[2],`16*2`(%rsp)
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
         pxor   $twres,$twmask
         movdqa @tweak[4],`16*4`(%rsp)
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        $movkey         64($key_),$rndkey0
         movdqa $twmask,`16*5`(%rsp)
        pshufd  \$0x5f,@tweak[5],$twres
        jmp     .Lxts_enc_loop6
.align  32
.Lxts_enc_loop6:
        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        $movkey         -64($key,%rax),$rndkey1
        add             \$32,%rax

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        $movkey         -80($key,%rax),$rndkey0
        jnz             .Lxts_enc_loop6

        movdqa  (%r8),$twmask                   # start calculating next tweak
        movdqa  $twres,$twtmp
        paddd   $twres,$twres
         aesenc         $rndkey1,$inout0
        paddq   @tweak[5],@tweak[5]
        psrad   \$31,$twtmp
         aesenc         $rndkey1,$inout1
        pand    $twmask,$twtmp
        $movkey ($key_),@tweak[0]               # load round[0]
         aesenc         $rndkey1,$inout2
         aesenc         $rndkey1,$inout3
         aesenc         $rndkey1,$inout4
        pxor    $twtmp,@tweak[5]
        movaps  @tweak[0],@tweak[1]             # copy round[0]
         aesenc         $rndkey1,$inout5
         $movkey        -64($key),$rndkey1

        movdqa  $twres,$twtmp
         aesenc         $rndkey0,$inout0
        paddd   $twres,$twres
        pxor    @tweak[5],@tweak[0]
         aesenc         $rndkey0,$inout1
        psrad   \$31,$twtmp
        paddq   @tweak[5],@tweak[5]
         aesenc         $rndkey0,$inout2
         aesenc         $rndkey0,$inout3
        pand    $twmask,$twtmp
        movaps  @tweak[1],@tweak[2]
         aesenc         $rndkey0,$inout4
        pxor    $twtmp,@tweak[5]
        movdqa  $twres,$twtmp
         aesenc         $rndkey0,$inout5
         $movkey        -48($key),$rndkey0

        paddd   $twres,$twres
         aesenc         $rndkey1,$inout0
        pxor    @tweak[5],@tweak[1]
        psrad   \$31,$twtmp
         aesenc         $rndkey1,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
         aesenc         $rndkey1,$inout2
         aesenc         $rndkey1,$inout3
         movdqa @tweak[3],`16*3`(%rsp)
        pxor    $twtmp,@tweak[5]
         aesenc         $rndkey1,$inout4
        movaps  @tweak[2],@tweak[3]
        movdqa  $twres,$twtmp
         aesenc         $rndkey1,$inout5
         $movkey        -32($key),$rndkey1

        paddd   $twres,$twres
         aesenc         $rndkey0,$inout0
        pxor    @tweak[5],@tweak[2]
        psrad   \$31,$twtmp
         aesenc         $rndkey0,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
         aesenc         $rndkey0,$inout2
         aesenc         $rndkey0,$inout3
         aesenc         $rndkey0,$inout4
        pxor    $twtmp,@tweak[5]
        movaps  @tweak[3],@tweak[4]
         aesenc         $rndkey0,$inout5

        movdqa  $twres,$rndkey0
        paddd   $twres,$twres
         aesenc         $rndkey1,$inout0
        pxor    @tweak[5],@tweak[3]
        psrad   \$31,$rndkey0
         aesenc         $rndkey1,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$rndkey0
         aesenc         $rndkey1,$inout2
         aesenc         $rndkey1,$inout3
        pxor    $rndkey0,@tweak[5]
        $movkey         ($key_),$rndkey0
         aesenc         $rndkey1,$inout4
         aesenc         $rndkey1,$inout5
        $movkey         16($key_),$rndkey1

        pxor    @tweak[5],@tweak[4]
         aesenclast     `16*0`(%rsp),$inout0
        psrad   \$31,$twres
        paddq   @tweak[5],@tweak[5]
         aesenclast     `16*1`(%rsp),$inout1
         aesenclast     `16*2`(%rsp),$inout2
        pand    $twmask,$twres
        mov     %r10,%rax                       # restore $rounds
         aesenclast     `16*3`(%rsp),$inout3
         aesenclast     `16*4`(%rsp),$inout4
         aesenclast     `16*5`(%rsp),$inout5
        pxor    $twres,@tweak[5]

        lea     `16*6`($out),$out               # $out+=6*16
        movups  $inout0,`-16*6`($out)           # store 6 output blocks
        movups  $inout1,`-16*5`($out)
        movups  $inout2,`-16*4`($out)
        movups  $inout3,`-16*3`($out)
        movups  $inout4,`-16*2`($out)
        movups  $inout5,`-16*1`($out)
        sub     \$16*6,$len
        jnc     .Lxts_enc_grandloop             # loop if $len-=6*16 didn't borrow

        mov     \$16+96,$rounds
        sub     $rnds_,$rounds
        mov     $key_,$key                      # restore $key
        shr     \$4,$rounds                     # restore original value

.Lxts_enc_short:
        # at the point @tweak[0..5] are populated with tweak values
        mov     $rounds,$rnds_                  # backup $rounds
        pxor    $rndkey0,@tweak[0]
        add     \$16*6,$len                     # restore real remaining $len
        jz      .Lxts_enc_done                  # done if ($len==0)

        pxor    $rndkey0,@tweak[1]
        cmp     \$0x20,$len
        jb      .Lxts_enc_one                   # $len is 1*16
        pxor    $rndkey0,@tweak[2]
        je      .Lxts_enc_two                   # $len is 2*16

        pxor    $rndkey0,@tweak[3]
        cmp     \$0x40,$len
        jb      .Lxts_enc_three                 # $len is 3*16
        pxor    $rndkey0,@tweak[4]
        je      .Lxts_enc_four                  # $len is 4*16

        movdqu  ($inp),$inout0                  # $len is 5*16
        movdqu  16*1($inp),$inout1
        movdqu  16*2($inp),$inout2
        pxor    @tweak[0],$inout0
        movdqu  16*3($inp),$inout3
        pxor    @tweak[1],$inout1
        movdqu  16*4($inp),$inout4
        lea     16*5($inp),$inp                 # $inp+=5*16
        pxor    @tweak[2],$inout2
        pxor    @tweak[3],$inout3
        pxor    @tweak[4],$inout4
        pxor    $inout5,$inout5

        call    _aesni_encrypt6

        xorps   @tweak[0],$inout0
        movdqa  @tweak[5],@tweak[0]
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2
        movdqu  $inout0,($out)                  # store 5 output blocks
        xorps   @tweak[3],$inout3
        movdqu  $inout1,16*1($out)
        xorps   @tweak[4],$inout4
        movdqu  $inout2,16*2($out)
        movdqu  $inout3,16*3($out)
        movdqu  $inout4,16*4($out)
        lea     16*5($out),$out                 # $out+=5*16
        jmp     .Lxts_enc_done

.align  16
.Lxts_enc_one:
        movups  ($inp),$inout0
        lea     16*1($inp),$inp                 # inp+=1*16
        xorps   @tweak[0],$inout0
___
        &aesni_generate1("enc",$key,$rounds);
$code.=<<___;
        xorps   @tweak[0],$inout0
        movdqa  @tweak[1],@tweak[0]
        movups  $inout0,($out)                  # store one output block
        lea     16*1($out),$out                 # $out+=1*16
        jmp     .Lxts_enc_done

.align  16
.Lxts_enc_two:
        movups  ($inp),$inout0
        movups  16($inp),$inout1
        lea     32($inp),$inp                   # $inp+=2*16
        xorps   @tweak[0],$inout0
        xorps   @tweak[1],$inout1

        call    _aesni_encrypt2

        xorps   @tweak[0],$inout0
        movdqa  @tweak[2],@tweak[0]
        xorps   @tweak[1],$inout1
        movups  $inout0,($out)                  # store 2 output blocks
        movups  $inout1,16*1($out)
        lea     16*2($out),$out                 # $out+=2*16
        jmp     .Lxts_enc_done

.align  16
.Lxts_enc_three:
        movups  ($inp),$inout0
        movups  16*1($inp),$inout1
        movups  16*2($inp),$inout2
        lea     16*3($inp),$inp                 # $inp+=3*16
        xorps   @tweak[0],$inout0
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2

        call    _aesni_encrypt3

        xorps   @tweak[0],$inout0
        movdqa  @tweak[3],@tweak[0]
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2
        movups  $inout0,($out)                  # store 3 output blocks
        movups  $inout1,16*1($out)
        movups  $inout2,16*2($out)
        lea     16*3($out),$out                 # $out+=3*16
        jmp     .Lxts_enc_done

.align  16
.Lxts_enc_four:
        movups  ($inp),$inout0
        movups  16*1($inp),$inout1
        movups  16*2($inp),$inout2
        xorps   @tweak[0],$inout0
        movups  16*3($inp),$inout3
        lea     16*4($inp),$inp                 # $inp+=4*16
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2
        xorps   @tweak[3],$inout3

        call    _aesni_encrypt4

        pxor    @tweak[0],$inout0
        movdqa  @tweak[4],@tweak[0]
        pxor    @tweak[1],$inout1
        pxor    @tweak[2],$inout2
        movdqu  $inout0,($out)                  # store 4 output blocks
        pxor    @tweak[3],$inout3
        movdqu  $inout1,16*1($out)
        movdqu  $inout2,16*2($out)
        movdqu  $inout3,16*3($out)
        lea     16*4($out),$out                 # $out+=4*16
        jmp     .Lxts_enc_done

.align  16
.Lxts_enc_done:
        and     \$15,$len_                      # see if $len%16 is 0
        jz      .Lxts_enc_ret
        mov     $len_,$len

.Lxts_enc_steal:
        movzb   ($inp),%eax                     # borrow $rounds ...
        movzb   -16($out),%ecx                  # ... and $key
        lea     1($inp),$inp
        mov     %al,-16($out)
        mov     %cl,0($out)
        lea     1($out),$out
        sub     \$1,$len
        jnz     .Lxts_enc_steal

        sub     $len_,$out                      # rewind $out
        mov     $key_,$key                      # restore $key
        mov     $rnds_,$rounds                  # restore $rounds

        movups  -16($out),$inout0
        xorps   @tweak[0],$inout0
___
        &aesni_generate1("enc",$key,$rounds);
$code.=<<___;
        xorps   @tweak[0],$inout0
        movups  $inout0,-16($out)

.Lxts_enc_ret:
        xorps   %xmm0,%xmm0                     # clear register bank
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
___
$code.=<<___ if (!$win64);
        pxor    %xmm6,%xmm6
        pxor    %xmm7,%xmm7
        movaps  %xmm0,0x00(%rsp)                # clear stack
        pxor    %xmm8,%xmm8
        movaps  %xmm0,0x10(%rsp)
        pxor    %xmm9,%xmm9
        movaps  %xmm0,0x20(%rsp)
        pxor    %xmm10,%xmm10
        movaps  %xmm0,0x30(%rsp)
        pxor    %xmm11,%xmm11
        movaps  %xmm0,0x40(%rsp)
        pxor    %xmm12,%xmm12
        movaps  %xmm0,0x50(%rsp)
        pxor    %xmm13,%xmm13
        movaps  %xmm0,0x60(%rsp)
        pxor    %xmm14,%xmm14
        pxor    %xmm15,%xmm15
___
$code.=<<___ if ($win64);
        movaps  -0xa8(%r11),%xmm6
        movaps  %xmm0,-0xa8(%r11)               # clear stack
        movaps  -0x98(%r11),%xmm7
        movaps  %xmm0,-0x98(%r11)
        movaps  -0x88(%r11),%xmm8
        movaps  %xmm0,-0x88(%r11)
        movaps  -0x78(%r11),%xmm9
        movaps  %xmm0,-0x78(%r11)
        movaps  -0x68(%r11),%xmm10
        movaps  %xmm0,-0x68(%r11)
        movaps  -0x58(%r11),%xmm11
        movaps  %xmm0,-0x58(%r11)
        movaps  -0x48(%r11),%xmm12
        movaps  %xmm0,-0x48(%r11)
        movaps  -0x38(%r11),%xmm13
        movaps  %xmm0,-0x38(%r11)
        movaps  -0x28(%r11),%xmm14
        movaps  %xmm0,-0x28(%r11)
        movaps  -0x18(%r11),%xmm15
        movaps  %xmm0,-0x18(%r11)
        movaps  %xmm0,0x00(%rsp)
        movaps  %xmm0,0x10(%rsp)
        movaps  %xmm0,0x20(%rsp)
        movaps  %xmm0,0x30(%rsp)
        movaps  %xmm0,0x40(%rsp)
        movaps  %xmm0,0x50(%rsp)
        movaps  %xmm0,0x60(%rsp)
___
$code.=<<___;
        mov     -8(%r11),%rbp
.cfi_restore    %rbp
        lea     (%r11),%rsp
.cfi_def_cfa_register   %rsp
.Lxts_enc_epilogue:
        ret
.cfi_endproc
.size   aesni_xts_encrypt,.-aesni_xts_encrypt
___

$code.=<<___;
.globl  aesni_xts_decrypt
.type   aesni_xts_decrypt,\@function,6
.align  16
aesni_xts_decrypt:
.cfi_startproc
        endbranch
        lea     (%rsp),%r11                     # frame pointer
.cfi_def_cfa_register   %r11
        push    %rbp
.cfi_push       %rbp
        sub     \$$frame_size,%rsp
        and     \$-16,%rsp      # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
        movaps  %xmm6,-0xa8(%r11)               # offload everything
        movaps  %xmm7,-0x98(%r11)
        movaps  %xmm8,-0x88(%r11)
        movaps  %xmm9,-0x78(%r11)
        movaps  %xmm10,-0x68(%r11)
        movaps  %xmm11,-0x58(%r11)
        movaps  %xmm12,-0x48(%r11)
        movaps  %xmm13,-0x38(%r11)
        movaps  %xmm14,-0x28(%r11)
        movaps  %xmm15,-0x18(%r11)
.Lxts_dec_body:
___
$code.=<<___;
        movups  ($ivp),$inout0                  # load clear-text tweak
        mov     240($key2),$rounds              # key2->rounds
        mov     240($key),$rnds_                # key1->rounds
___
        # generate the tweak
        &aesni_generate1("enc",$key2,$rounds,$inout0);
$code.=<<___;
        xor     %eax,%eax                       # if ($len%16) len-=16;
        test    \$15,$len
        setnz   %al
        shl     \$4,%rax
        sub     %rax,$len

        $movkey ($key),$rndkey0                 # zero round key
        mov     $key,$key_                      # backup $key
        mov     $rnds_,$rounds                  # backup $rounds
        shl     \$4,$rnds_
        mov     $len,$len_                      # backup $len
        and     \$-16,$len

        $movkey 16($key,$rnds_),$rndkey1        # last round key

        movdqa  .Lxts_magic(%rip),$twmask
        movdqa  $inout0,@tweak[5]
        pshufd  \$0x5f,$inout0,$twres
        pxor    $rndkey0,$rndkey1
___
    for ($i=0;$i<4;$i++) {
    $code.=<<___;
        movdqa  $twres,$twtmp
        paddd   $twres,$twres
        movdqa  @tweak[5],@tweak[$i]
        psrad   \$31,$twtmp                     # broadcast upper bits
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
        pxor    $rndkey0,@tweak[$i]
        pxor    $twtmp,@tweak[5]
___
    }
$code.=<<___;
        movdqa  @tweak[5],@tweak[4]
        psrad   \$31,$twres
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twres
        pxor    $rndkey0,@tweak[4]
        pxor    $twres,@tweak[5]
        movaps  $rndkey1,0x60(%rsp)             # save round[0]^round[last]

        sub     \$16*6,$len
        jc      .Lxts_dec_short                 # if $len-=6*16 borrowed

        mov     \$16+96,$rounds
        lea     32($key_,$rnds_),$key           # end of key schedule
        sub     %r10,%rax                       # twisted $rounds
        $movkey 16($key_),$rndkey1
        mov     %rax,%r10                       # backup twisted $rounds
        lea     .Lxts_magic(%rip),%r8
        jmp     .Lxts_dec_grandloop

.align  32
.Lxts_dec_grandloop:
        movdqu  `16*0`($inp),$inout0            # load input
        movdqa  $rndkey0,$twmask
        movdqu  `16*1`($inp),$inout1
        pxor    @tweak[0],$inout0               # input^=tweak^round[0]
        movdqu  `16*2`($inp),$inout2
        pxor    @tweak[1],$inout1
         aesdec         $rndkey1,$inout0
        movdqu  `16*3`($inp),$inout3
        pxor    @tweak[2],$inout2
         aesdec         $rndkey1,$inout1
        movdqu  `16*4`($inp),$inout4
        pxor    @tweak[3],$inout3
         aesdec         $rndkey1,$inout2
        movdqu  `16*5`($inp),$inout5
        pxor    @tweak[5],$twmask               # round[0]^=tweak[5]
         movdqa 0x60(%rsp),$twres               # load round[0]^round[last]
        pxor    @tweak[4],$inout4
         aesdec         $rndkey1,$inout3
        $movkey 32($key_),$rndkey0
        lea     `16*6`($inp),$inp
        pxor    $twmask,$inout5

         pxor   $twres,@tweak[0]                # calculate tweaks^round[last]
        aesdec          $rndkey1,$inout4
         pxor   $twres,@tweak[1]
         movdqa @tweak[0],`16*0`(%rsp)          # put aside tweaks^last round key
        aesdec          $rndkey1,$inout5
        $movkey         48($key_),$rndkey1
         pxor   $twres,@tweak[2]

        aesdec          $rndkey0,$inout0
         pxor   $twres,@tweak[3]
         movdqa @tweak[1],`16*1`(%rsp)
        aesdec          $rndkey0,$inout1
         pxor   $twres,@tweak[4]
         movdqa @tweak[2],`16*2`(%rsp)
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
         pxor   $twres,$twmask
         movdqa @tweak[4],`16*4`(%rsp)
        aesdec          $rndkey0,$inout4
        aesdec          $rndkey0,$inout5
        $movkey         64($key_),$rndkey0
         movdqa $twmask,`16*5`(%rsp)
        pshufd  \$0x5f,@tweak[5],$twres
        jmp     .Lxts_dec_loop6
.align  32
.Lxts_dec_loop6:
        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        aesdec          $rndkey1,$inout4
        aesdec          $rndkey1,$inout5
        $movkey         -64($key,%rax),$rndkey1
        add             \$32,%rax

        aesdec          $rndkey0,$inout0
        aesdec          $rndkey0,$inout1
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
        aesdec          $rndkey0,$inout4
        aesdec          $rndkey0,$inout5
        $movkey         -80($key,%rax),$rndkey0
        jnz             .Lxts_dec_loop6

        movdqa  (%r8),$twmask                   # start calculating next tweak
        movdqa  $twres,$twtmp
        paddd   $twres,$twres
         aesdec         $rndkey1,$inout0
        paddq   @tweak[5],@tweak[5]
        psrad   \$31,$twtmp
         aesdec         $rndkey1,$inout1
        pand    $twmask,$twtmp
        $movkey ($key_),@tweak[0]               # load round[0]
         aesdec         $rndkey1,$inout2
         aesdec         $rndkey1,$inout3
         aesdec         $rndkey1,$inout4
        pxor    $twtmp,@tweak[5]
        movaps  @tweak[0],@tweak[1]             # copy round[0]
         aesdec         $rndkey1,$inout5
         $movkey        -64($key),$rndkey1

        movdqa  $twres,$twtmp
         aesdec         $rndkey0,$inout0
        paddd   $twres,$twres
        pxor    @tweak[5],@tweak[0]
         aesdec         $rndkey0,$inout1
        psrad   \$31,$twtmp
        paddq   @tweak[5],@tweak[5]
         aesdec         $rndkey0,$inout2
         aesdec         $rndkey0,$inout3
        pand    $twmask,$twtmp
        movaps  @tweak[1],@tweak[2]
         aesdec         $rndkey0,$inout4
        pxor    $twtmp,@tweak[5]
        movdqa  $twres,$twtmp
         aesdec         $rndkey0,$inout5
         $movkey        -48($key),$rndkey0

        paddd   $twres,$twres
         aesdec         $rndkey1,$inout0
        pxor    @tweak[5],@tweak[1]
        psrad   \$31,$twtmp
         aesdec         $rndkey1,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
         aesdec         $rndkey1,$inout2
         aesdec         $rndkey1,$inout3
         movdqa @tweak[3],`16*3`(%rsp)
        pxor    $twtmp,@tweak[5]
         aesdec         $rndkey1,$inout4
        movaps  @tweak[2],@tweak[3]
        movdqa  $twres,$twtmp
         aesdec         $rndkey1,$inout5
         $movkey        -32($key),$rndkey1

        paddd   $twres,$twres
         aesdec         $rndkey0,$inout0
        pxor    @tweak[5],@tweak[2]
        psrad   \$31,$twtmp
         aesdec         $rndkey0,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$twtmp
         aesdec         $rndkey0,$inout2
         aesdec         $rndkey0,$inout3
         aesdec         $rndkey0,$inout4
        pxor    $twtmp,@tweak[5]
        movaps  @tweak[3],@tweak[4]
         aesdec         $rndkey0,$inout5

        movdqa  $twres,$rndkey0
        paddd   $twres,$twres
         aesdec         $rndkey1,$inout0
        pxor    @tweak[5],@tweak[3]
        psrad   \$31,$rndkey0
         aesdec         $rndkey1,$inout1
        paddq   @tweak[5],@tweak[5]
        pand    $twmask,$rndkey0
         aesdec         $rndkey1,$inout2
         aesdec         $rndkey1,$inout3
        pxor    $rndkey0,@tweak[5]
        $movkey         ($key_),$rndkey0
         aesdec         $rndkey1,$inout4
         aesdec         $rndkey1,$inout5
        $movkey         16($key_),$rndkey1

        pxor    @tweak[5],@tweak[4]
         aesdeclast     `16*0`(%rsp),$inout0
        psrad   \$31,$twres
        paddq   @tweak[5],@tweak[5]
         aesdeclast     `16*1`(%rsp),$inout1
         aesdeclast     `16*2`(%rsp),$inout2
        pand    $twmask,$twres
        mov     %r10,%rax                       # restore $rounds
         aesdeclast     `16*3`(%rsp),$inout3
         aesdeclast     `16*4`(%rsp),$inout4
         aesdeclast     `16*5`(%rsp),$inout5
        pxor    $twres,@tweak[5]

        lea     `16*6`($out),$out               # $out+=6*16
        movups  $inout0,`-16*6`($out)           # store 6 output blocks
        movups  $inout1,`-16*5`($out)
        movups  $inout2,`-16*4`($out)
        movups  $inout3,`-16*3`($out)
        movups  $inout4,`-16*2`($out)
        movups  $inout5,`-16*1`($out)
        sub     \$16*6,$len
        jnc     .Lxts_dec_grandloop             # loop if $len-=6*16 didn't borrow

        mov     \$16+96,$rounds
        sub     $rnds_,$rounds
        mov     $key_,$key                      # restore $key
        shr     \$4,$rounds                     # restore original value

.Lxts_dec_short:
        # at the point @tweak[0..5] are populated with tweak values
        mov     $rounds,$rnds_                  # backup $rounds
        pxor    $rndkey0,@tweak[0]
        pxor    $rndkey0,@tweak[1]
        add     \$16*6,$len                     # restore real remaining $len
        jz      .Lxts_dec_done                  # done if ($len==0)

        pxor    $rndkey0,@tweak[2]
        cmp     \$0x20,$len
        jb      .Lxts_dec_one                   # $len is 1*16
        pxor    $rndkey0,@tweak[3]
        je      .Lxts_dec_two                   # $len is 2*16

        pxor    $rndkey0,@tweak[4]
        cmp     \$0x40,$len
        jb      .Lxts_dec_three                 # $len is 3*16
        je      .Lxts_dec_four                  # $len is 4*16

        movdqu  ($inp),$inout0                  # $len is 5*16
        movdqu  16*1($inp),$inout1
        movdqu  16*2($inp),$inout2
        pxor    @tweak[0],$inout0
        movdqu  16*3($inp),$inout3
        pxor    @tweak[1],$inout1
        movdqu  16*4($inp),$inout4
        lea     16*5($inp),$inp                 # $inp+=5*16
        pxor    @tweak[2],$inout2
        pxor    @tweak[3],$inout3
        pxor    @tweak[4],$inout4

        call    _aesni_decrypt6

        xorps   @tweak[0],$inout0
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2
        movdqu  $inout0,($out)                  # store 5 output blocks
        xorps   @tweak[3],$inout3
        movdqu  $inout1,16*1($out)
        xorps   @tweak[4],$inout4
        movdqu  $inout2,16*2($out)
         pxor           $twtmp,$twtmp
        movdqu  $inout3,16*3($out)
         pcmpgtd        @tweak[5],$twtmp
        movdqu  $inout4,16*4($out)
        lea     16*5($out),$out                 # $out+=5*16
         pshufd         \$0x13,$twtmp,@tweak[1] # $twres
        and     \$15,$len_
        jz      .Lxts_dec_ret

        movdqa  @tweak[5],@tweak[0]
        paddq   @tweak[5],@tweak[5]             # psllq 1,$tweak
        pand    $twmask,@tweak[1]               # isolate carry and residue
        pxor    @tweak[5],@tweak[1]
        jmp     .Lxts_dec_done2

.align  16
.Lxts_dec_one:
        movups  ($inp),$inout0
        lea     16*1($inp),$inp                 # $inp+=1*16
        xorps   @tweak[0],$inout0
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
        xorps   @tweak[0],$inout0
        movdqa  @tweak[1],@tweak[0]
        movups  $inout0,($out)                  # store one output block
        movdqa  @tweak[2],@tweak[1]
        lea     16*1($out),$out                 # $out+=1*16
        jmp     .Lxts_dec_done

.align  16
.Lxts_dec_two:
        movups  ($inp),$inout0
        movups  16($inp),$inout1
        lea     32($inp),$inp                   # $inp+=2*16
        xorps   @tweak[0],$inout0
        xorps   @tweak[1],$inout1

        call    _aesni_decrypt2

        xorps   @tweak[0],$inout0
        movdqa  @tweak[2],@tweak[0]
        xorps   @tweak[1],$inout1
        movdqa  @tweak[3],@tweak[1]
        movups  $inout0,($out)                  # store 2 output blocks
        movups  $inout1,16*1($out)
        lea     16*2($out),$out                 # $out+=2*16
        jmp     .Lxts_dec_done

.align  16
.Lxts_dec_three:
        movups  ($inp),$inout0
        movups  16*1($inp),$inout1
        movups  16*2($inp),$inout2
        lea     16*3($inp),$inp                 # $inp+=3*16
        xorps   @tweak[0],$inout0
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2

        call    _aesni_decrypt3

        xorps   @tweak[0],$inout0
        movdqa  @tweak[3],@tweak[0]
        xorps   @tweak[1],$inout1
        movdqa  @tweak[4],@tweak[1]
        xorps   @tweak[2],$inout2
        movups  $inout0,($out)                  # store 3 output blocks
        movups  $inout1,16*1($out)
        movups  $inout2,16*2($out)
        lea     16*3($out),$out                 # $out+=3*16
        jmp     .Lxts_dec_done

.align  16
.Lxts_dec_four:
        movups  ($inp),$inout0
        movups  16*1($inp),$inout1
        movups  16*2($inp),$inout2
        xorps   @tweak[0],$inout0
        movups  16*3($inp),$inout3
        lea     16*4($inp),$inp                 # $inp+=4*16
        xorps   @tweak[1],$inout1
        xorps   @tweak[2],$inout2
        xorps   @tweak[3],$inout3

        call    _aesni_decrypt4

        pxor    @tweak[0],$inout0
        movdqa  @tweak[4],@tweak[0]
        pxor    @tweak[1],$inout1
        movdqa  @tweak[5],@tweak[1]
        pxor    @tweak[2],$inout2
        movdqu  $inout0,($out)                  # store 4 output blocks
        pxor    @tweak[3],$inout3
        movdqu  $inout1,16*1($out)
        movdqu  $inout2,16*2($out)
        movdqu  $inout3,16*3($out)
        lea     16*4($out),$out                 # $out+=4*16
        jmp     .Lxts_dec_done

.align  16
.Lxts_dec_done:
        and     \$15,$len_                      # see if $len%16 is 0
        jz      .Lxts_dec_ret
.Lxts_dec_done2:
        mov     $len_,$len
        mov     $key_,$key                      # restore $key
        mov     $rnds_,$rounds                  # restore $rounds

        movups  ($inp),$inout0
        xorps   @tweak[1],$inout0
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
        xorps   @tweak[1],$inout0
        movups  $inout0,($out)

.Lxts_dec_steal:
        movzb   16($inp),%eax                   # borrow $rounds ...
        movzb   ($out),%ecx                     # ... and $key
        lea     1($inp),$inp
        mov     %al,($out)
        mov     %cl,16($out)
        lea     1($out),$out
        sub     \$1,$len
        jnz     .Lxts_dec_steal

        sub     $len_,$out                      # rewind $out
        mov     $key_,$key                      # restore $key
        mov     $rnds_,$rounds                  # restore $rounds

        movups  ($out),$inout0
        xorps   @tweak[0],$inout0
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
        xorps   @tweak[0],$inout0
        movups  $inout0,($out)

.Lxts_dec_ret:
        xorps   %xmm0,%xmm0                     # clear register bank
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
___
$code.=<<___ if (!$win64);
        pxor    %xmm6,%xmm6
        pxor    %xmm7,%xmm7
        movaps  %xmm0,0x00(%rsp)                # clear stack
        pxor    %xmm8,%xmm8
        movaps  %xmm0,0x10(%rsp)
        pxor    %xmm9,%xmm9
        movaps  %xmm0,0x20(%rsp)
        pxor    %xmm10,%xmm10
        movaps  %xmm0,0x30(%rsp)
        pxor    %xmm11,%xmm11
        movaps  %xmm0,0x40(%rsp)
        pxor    %xmm12,%xmm12
        movaps  %xmm0,0x50(%rsp)
        pxor    %xmm13,%xmm13
        movaps  %xmm0,0x60(%rsp)
        pxor    %xmm14,%xmm14
        pxor    %xmm15,%xmm15
___
$code.=<<___ if ($win64);
        movaps  -0xa8(%r11),%xmm6
        movaps  %xmm0,-0xa8(%r11)               # clear stack
        movaps  -0x98(%r11),%xmm7
        movaps  %xmm0,-0x98(%r11)
        movaps  -0x88(%r11),%xmm8
        movaps  %xmm0,-0x88(%r11)
        movaps  -0x78(%r11),%xmm9
        movaps  %xmm0,-0x78(%r11)
        movaps  -0x68(%r11),%xmm10
        movaps  %xmm0,-0x68(%r11)
        movaps  -0x58(%r11),%xmm11
        movaps  %xmm0,-0x58(%r11)
        movaps  -0x48(%r11),%xmm12
        movaps  %xmm0,-0x48(%r11)
        movaps  -0x38(%r11),%xmm13
        movaps  %xmm0,-0x38(%r11)
        movaps  -0x28(%r11),%xmm14
        movaps  %xmm0,-0x28(%r11)
        movaps  -0x18(%r11),%xmm15
        movaps  %xmm0,-0x18(%r11)
        movaps  %xmm0,0x00(%rsp)
        movaps  %xmm0,0x10(%rsp)
        movaps  %xmm0,0x20(%rsp)
        movaps  %xmm0,0x30(%rsp)
        movaps  %xmm0,0x40(%rsp)
        movaps  %xmm0,0x50(%rsp)
        movaps  %xmm0,0x60(%rsp)
___
$code.=<<___;
        mov     -8(%r11),%rbp
.cfi_restore    %rbp
        lea     (%r11),%rsp
.cfi_def_cfa_register   %rsp
.Lxts_dec_epilogue:
        ret
.cfi_endproc
.size   aesni_xts_decrypt,.-aesni_xts_decrypt
___
}
\f
######################################################################
# void aesni_ocb_[en|de]crypt(const char *inp, char *out, size_t blocks,
#       const AES_KEY *key, unsigned int start_block_num,
#       unsigned char offset_i[16], const unsigned char L_[][16],
#       unsigned char checksum[16]);
#
{
my @offset=map("%xmm$_",(10..15));
my ($checksum,$rndkey0l)=("%xmm8","%xmm9");
my ($block_num,$offset_p)=("%r8","%r9");                # 5th and 6th arguments
my ($L_p,$checksum_p) = ("%rbx","%rbp");
my ($i1,$i3,$i5) = ("%r12","%r13","%r14");
my $seventh_arg = $win64 ? 56 : 8;
my $blocks = $len;

$code.=<<___;
.globl  aesni_ocb_encrypt
.type   aesni_ocb_encrypt,\@function,6
.align  32
aesni_ocb_encrypt:
.cfi_startproc
        endbranch
        lea     (%rsp),%rax
        push    %rbx
.cfi_push       %rbx
        push    %rbp
.cfi_push       %rbp
        push    %r12
.cfi_push       %r12
        push    %r13
.cfi_push       %r13
        push    %r14
.cfi_push       %r14
___
$code.=<<___ if ($win64);
        lea     -0xa0(%rsp),%rsp
        movaps  %xmm6,0x00(%rsp)                # offload everything
        movaps  %xmm7,0x10(%rsp)
        movaps  %xmm8,0x20(%rsp)
        movaps  %xmm9,0x30(%rsp)
        movaps  %xmm10,0x40(%rsp)
        movaps  %xmm11,0x50(%rsp)
        movaps  %xmm12,0x60(%rsp)
        movaps  %xmm13,0x70(%rsp)
        movaps  %xmm14,0x80(%rsp)
        movaps  %xmm15,0x90(%rsp)
.Locb_enc_body:
___
$code.=<<___;
        mov     $seventh_arg(%rax),$L_p         # 7th argument
        mov     $seventh_arg+8(%rax),$checksum_p# 8th argument

        mov     240($key),$rnds_
        mov     $key,$key_
        shl     \$4,$rnds_
        $movkey ($key),$rndkey0l                # round[0]
        $movkey 16($key,$rnds_),$rndkey1        # round[last]

        movdqu  ($offset_p),@offset[5]          # load last offset_i
        pxor    $rndkey1,$rndkey0l              # round[0] ^ round[last]
        pxor    $rndkey1,@offset[5]             # offset_i ^ round[last]

        mov     \$16+32,$rounds
        lea     32($key_,$rnds_),$key
        $movkey 16($key_),$rndkey1              # round[1]
        sub     %r10,%rax                       # twisted $rounds
        mov     %rax,%r10                       # backup twisted $rounds

        movdqu  ($L_p),@offset[0]               # L_0 for all odd-numbered blocks
        movdqu  ($checksum_p),$checksum         # load checksum

        test    \$1,$block_num                  # is first block number odd?
        jnz     .Locb_enc_odd

        bsf     $block_num,$i1
        add     \$1,$block_num
        shl     \$4,$i1
        movdqu  ($L_p,$i1),$inout5              # borrow
        movdqu  ($inp),$inout0
        lea     16($inp),$inp

        call    __ocb_encrypt1

        movdqa  $inout5,@offset[5]
        movups  $inout0,($out)
        lea     16($out),$out
        sub     \$1,$blocks
        jz      .Locb_enc_done

.Locb_enc_odd:
        lea     1($block_num),$i1               # even-numbered blocks
        lea     3($block_num),$i3
        lea     5($block_num),$i5
        lea     6($block_num),$block_num
        bsf     $i1,$i1                         # ntz(block)
        bsf     $i3,$i3
        bsf     $i5,$i5
        shl     \$4,$i1                         # ntz(block) -> table offset
        shl     \$4,$i3
        shl     \$4,$i5

        sub     \$6,$blocks
        jc      .Locb_enc_short
        jmp     .Locb_enc_grandloop

.align  32
.Locb_enc_grandloop:
        movdqu  `16*0`($inp),$inout0            # load input
        movdqu  `16*1`($inp),$inout1
        movdqu  `16*2`($inp),$inout2
        movdqu  `16*3`($inp),$inout3
        movdqu  `16*4`($inp),$inout4
        movdqu  `16*5`($inp),$inout5
        lea     `16*6`($inp),$inp

        call    __ocb_encrypt6

        movups  $inout0,`16*0`($out)            # store output
        movups  $inout1,`16*1`($out)
        movups  $inout2,`16*2`($out)
        movups  $inout3,`16*3`($out)
        movups  $inout4,`16*4`($out)
        movups  $inout5,`16*5`($out)
        lea     `16*6`($out),$out
        sub     \$6,$blocks
        jnc     .Locb_enc_grandloop

.Locb_enc_short:
        add     \$6,$blocks
        jz      .Locb_enc_done

        movdqu  `16*0`($inp),$inout0
        cmp     \$2,$blocks
        jb      .Locb_enc_one
        movdqu  `16*1`($inp),$inout1
        je      .Locb_enc_two

        movdqu  `16*2`($inp),$inout2
        cmp     \$4,$blocks
        jb      .Locb_enc_three
        movdqu  `16*3`($inp),$inout3
        je      .Locb_enc_four

        movdqu  `16*4`($inp),$inout4
        pxor    $inout5,$inout5

        call    __ocb_encrypt6

        movdqa  @offset[4],@offset[5]
        movups  $inout0,`16*0`($out)
        movups  $inout1,`16*1`($out)
        movups  $inout2,`16*2`($out)
        movups  $inout3,`16*3`($out)
        movups  $inout4,`16*4`($out)

        jmp     .Locb_enc_done

.align  16
.Locb_enc_one:
        movdqa  @offset[0],$inout5              # borrow

        call    __ocb_encrypt1

        movdqa  $inout5,@offset[5]
        movups  $inout0,`16*0`($out)
        jmp     .Locb_enc_done

.align  16
.Locb_enc_two:
        pxor    $inout2,$inout2
        pxor    $inout3,$inout3

        call    __ocb_encrypt4

        movdqa  @offset[1],@offset[5]
        movups  $inout0,`16*0`($out)
        movups  $inout1,`16*1`($out)

        jmp     .Locb_enc_done

.align  16
.Locb_enc_three:
        pxor    $inout3,$inout3

        call    __ocb_encrypt4

        movdqa  @offset[2],@offset[5]
        movups  $inout0,`16*0`($out)
        movups  $inout1,`16*1`($out)
        movups  $inout2,`16*2`($out)

        jmp     .Locb_enc_done

.align  16
.Locb_enc_four:
        call    __ocb_encrypt4

        movdqa  @offset[3],@offset[5]
        movups  $inout0,`16*0`($out)
        movups  $inout1,`16*1`($out)
        movups  $inout2,`16*2`($out)
        movups  $inout3,`16*3`($out)

.Locb_enc_done:
        pxor    $rndkey0,@offset[5]             # "remove" round[last]
        movdqu  $checksum,($checksum_p)         # store checksum
        movdqu  @offset[5],($offset_p)          # store last offset_i

        xorps   %xmm0,%xmm0                     # clear register bank
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
___
$code.=<<___ if (!$win64);
        pxor    %xmm6,%xmm6
        pxor    %xmm7,%xmm7
        pxor    %xmm8,%xmm8
        pxor    %xmm9,%xmm9
        pxor    %xmm10,%xmm10
        pxor    %xmm11,%xmm11
        pxor    %xmm12,%xmm12
        pxor    %xmm13,%xmm13
        pxor    %xmm14,%xmm14
        pxor    %xmm15,%xmm15
        lea     0x28(%rsp),%rax
.cfi_def_cfa    %rax,8
___
$code.=<<___ if ($win64);
        movaps  0x00(%rsp),%xmm6
        movaps  %xmm0,0x00(%rsp)                # clear stack
        movaps  0x10(%rsp),%xmm7
        movaps  %xmm0,0x10(%rsp)
        movaps  0x20(%rsp),%xmm8
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm9
        movaps  %xmm0,0x30(%rsp)
        movaps  0x40(%rsp),%xmm10
        movaps  %xmm0,0x40(%rsp)
        movaps  0x50(%rsp),%xmm11
        movaps  %xmm0,0x50(%rsp)
        movaps  0x60(%rsp),%xmm12
        movaps  %xmm0,0x60(%rsp)
        movaps  0x70(%rsp),%xmm13
        movaps  %xmm0,0x70(%rsp)
        movaps  0x80(%rsp),%xmm14
        movaps  %xmm0,0x80(%rsp)
        movaps  0x90(%rsp),%xmm15
        movaps  %xmm0,0x90(%rsp)
        lea     0xa0+0x28(%rsp),%rax
.Locb_enc_pop:
___
$code.=<<___;
        mov     -40(%rax),%r14
.cfi_restore    %r14
        mov     -32(%rax),%r13
.cfi_restore    %r13
        mov     -24(%rax),%r12
.cfi_restore    %r12
        mov     -16(%rax),%rbp
.cfi_restore    %rbp
        mov     -8(%rax),%rbx
.cfi_restore    %rbx
        lea     (%rax),%rsp
.cfi_def_cfa_register   %rsp
.Locb_enc_epilogue:
        ret
.cfi_endproc
.size   aesni_ocb_encrypt,.-aesni_ocb_encrypt

.type   __ocb_encrypt6,\@abi-omnipotent
.align  32
__ocb_encrypt6:
.cfi_startproc
         pxor           $rndkey0l,@offset[5]    # offset_i ^ round[0]
         movdqu         ($L_p,$i1),@offset[1]
         movdqa         @offset[0],@offset[2]
         movdqu         ($L_p,$i3),@offset[3]
         movdqa         @offset[0],@offset[4]
         pxor           @offset[5],@offset[0]
         movdqu         ($L_p,$i5),@offset[5]
         pxor           @offset[0],@offset[1]
        pxor            $inout0,$checksum       # accumulate checksum
        pxor            @offset[0],$inout0      # input ^ round[0] ^ offset_i
         pxor           @offset[1],@offset[2]
        pxor            $inout1,$checksum
        pxor            @offset[1],$inout1
         pxor           @offset[2],@offset[3]
        pxor            $inout2,$checksum
        pxor            @offset[2],$inout2
         pxor           @offset[3],@offset[4]
        pxor            $inout3,$checksum
        pxor            @offset[3],$inout3
         pxor           @offset[4],@offset[5]
        pxor            $inout4,$checksum
        pxor            @offset[4],$inout4
        pxor            $inout5,$checksum
        pxor            @offset[5],$inout5
        $movkey         32($key_),$rndkey0

        lea             1($block_num),$i1       # even-numbered blocks
        lea             3($block_num),$i3
        lea             5($block_num),$i5
        add             \$6,$block_num
         pxor           $rndkey0l,@offset[0]    # offset_i ^ round[last]
        bsf             $i1,$i1                 # ntz(block)
        bsf             $i3,$i3
        bsf             $i5,$i5

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
         pxor           $rndkey0l,@offset[1]
         pxor           $rndkey0l,@offset[2]
        aesenc          $rndkey1,$inout4
         pxor           $rndkey0l,@offset[3]
         pxor           $rndkey0l,@offset[4]
        aesenc          $rndkey1,$inout5
        $movkey         48($key_),$rndkey1
         pxor           $rndkey0l,@offset[5]

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        $movkey         64($key_),$rndkey0
        shl             \$4,$i1                 # ntz(block) -> table offset
        shl             \$4,$i3
        jmp             .Locb_enc_loop6

.align  32
.Locb_enc_loop6:
        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        aesenc          $rndkey0,$inout4
        aesenc          $rndkey0,$inout5
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_enc_loop6

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        aesenc          $rndkey1,$inout4
        aesenc          $rndkey1,$inout5
        $movkey         16($key_),$rndkey1
        shl             \$4,$i5

        aesenclast      @offset[0],$inout0
        movdqu          ($L_p),@offset[0]       # L_0 for all odd-numbered blocks
        mov             %r10,%rax               # restore twisted rounds
        aesenclast      @offset[1],$inout1
        aesenclast      @offset[2],$inout2
        aesenclast      @offset[3],$inout3
        aesenclast      @offset[4],$inout4
        aesenclast      @offset[5],$inout5
        ret
.cfi_endproc
.size   __ocb_encrypt6,.-__ocb_encrypt6

.type   __ocb_encrypt4,\@abi-omnipotent
.align  32
__ocb_encrypt4:
.cfi_startproc
         pxor           $rndkey0l,@offset[5]    # offset_i ^ round[0]
         movdqu         ($L_p,$i1),@offset[1]
         movdqa         @offset[0],@offset[2]
         movdqu         ($L_p,$i3),@offset[3]
         pxor           @offset[5],@offset[0]
         pxor           @offset[0],@offset[1]
        pxor            $inout0,$checksum       # accumulate checksum
        pxor            @offset[0],$inout0      # input ^ round[0] ^ offset_i
         pxor           @offset[1],@offset[2]
        pxor            $inout1,$checksum
        pxor            @offset[1],$inout1
         pxor           @offset[2],@offset[3]
        pxor            $inout2,$checksum
        pxor            @offset[2],$inout2
        pxor            $inout3,$checksum
        pxor            @offset[3],$inout3
        $movkey         32($key_),$rndkey0

         pxor           $rndkey0l,@offset[0]    # offset_i ^ round[last]
         pxor           $rndkey0l,@offset[1]
         pxor           $rndkey0l,@offset[2]
         pxor           $rndkey0l,@offset[3]

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        $movkey         48($key_),$rndkey1

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        $movkey         64($key_),$rndkey0
        jmp             .Locb_enc_loop4

.align  32
.Locb_enc_loop4:
        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesenc          $rndkey0,$inout0
        aesenc          $rndkey0,$inout1
        aesenc          $rndkey0,$inout2
        aesenc          $rndkey0,$inout3
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_enc_loop4

        aesenc          $rndkey1,$inout0
        aesenc          $rndkey1,$inout1
        aesenc          $rndkey1,$inout2
        aesenc          $rndkey1,$inout3
        $movkey         16($key_),$rndkey1
        mov             %r10,%rax               # restore twisted rounds

        aesenclast      @offset[0],$inout0
        aesenclast      @offset[1],$inout1
        aesenclast      @offset[2],$inout2
        aesenclast      @offset[3],$inout3
        ret
.cfi_endproc
.size   __ocb_encrypt4,.-__ocb_encrypt4

.type   __ocb_encrypt1,\@abi-omnipotent
.align  32
__ocb_encrypt1:
.cfi_startproc
         pxor           @offset[5],$inout5      # offset_i
         pxor           $rndkey0l,$inout5       # offset_i ^ round[0]
        pxor            $inout0,$checksum       # accumulate checksum
        pxor            $inout5,$inout0         # input ^ round[0] ^ offset_i
        $movkey         32($key_),$rndkey0

        aesenc          $rndkey1,$inout0
        $movkey         48($key_),$rndkey1
        pxor            $rndkey0l,$inout5       # offset_i ^ round[last]

        aesenc          $rndkey0,$inout0
        $movkey         64($key_),$rndkey0
        jmp             .Locb_enc_loop1

.align  32
.Locb_enc_loop1:
        aesenc          $rndkey1,$inout0
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesenc          $rndkey0,$inout0
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_enc_loop1

        aesenc          $rndkey1,$inout0
        $movkey         16($key_),$rndkey1      # redundant in tail
        mov             %r10,%rax               # restore twisted rounds

        aesenclast      $inout5,$inout0
        ret
.cfi_endproc
.size   __ocb_encrypt1,.-__ocb_encrypt1

.globl  aesni_ocb_decrypt
.type   aesni_ocb_decrypt,\@function,6
.align  32
aesni_ocb_decrypt:
.cfi_startproc
        endbranch
        lea     (%rsp),%rax
        push    %rbx
.cfi_push       %rbx
        push    %rbp
.cfi_push       %rbp
        push    %r12
.cfi_push       %r12
        push    %r13
.cfi_push       %r13
        push    %r14
.cfi_push       %r14
___
$code.=<<___ if ($win64);
        lea     -0xa0(%rsp),%rsp
        movaps  %xmm6,0x00(%rsp)                # offload everything
        movaps  %xmm7,0x10(%rsp)
        movaps  %xmm8,0x20(%rsp)
        movaps  %xmm9,0x30(%rsp)
        movaps  %xmm10,0x40(%rsp)
        movaps  %xmm11,0x50(%rsp)
        movaps  %xmm12,0x60(%rsp)
        movaps  %xmm13,0x70(%rsp)
        movaps  %xmm14,0x80(%rsp)
        movaps  %xmm15,0x90(%rsp)
.Locb_dec_body:
___
$code.=<<___;
        mov     $seventh_arg(%rax),$L_p         # 7th argument
        mov     $seventh_arg+8(%rax),$checksum_p# 8th argument

        mov     240($key),$rnds_
        mov     $key,$key_
        shl     \$4,$rnds_
        $movkey ($key),$rndkey0l                # round[0]
        $movkey 16($key,$rnds_),$rndkey1        # round[last]

        movdqu  ($offset_p),@offset[5]          # load last offset_i
        pxor    $rndkey1,$rndkey0l              # round[0] ^ round[last]
        pxor    $rndkey1,@offset[5]             # offset_i ^ round[last]

        mov     \$16+32,$rounds
        lea     32($key_,$rnds_),$key
        $movkey 16($key_),$rndkey1              # round[1]
        sub     %r10,%rax                       # twisted $rounds
        mov     %rax,%r10                       # backup twisted $rounds

        movdqu  ($L_p),@offset[0]               # L_0 for all odd-numbered blocks
        movdqu  ($checksum_p),$checksum         # load checksum

        test    \$1,$block_num                  # is first block number odd?
        jnz     .Locb_dec_odd

        bsf     $block_num,$i1
        add     \$1,$block_num
        shl     \$4,$i1
        movdqu  ($L_p,$i1),$inout5              # borrow
        movdqu  ($inp),$inout0
        lea     16($inp),$inp

        call    __ocb_decrypt1

        movdqa  $inout5,@offset[5]
        movups  $inout0,($out)
        xorps   $inout0,$checksum               # accumulate checksum
        lea     16($out),$out
        sub     \$1,$blocks
        jz      .Locb_dec_done

.Locb_dec_odd:
        lea     1($block_num),$i1               # even-numbered blocks
        lea     3($block_num),$i3
        lea     5($block_num),$i5
        lea     6($block_num),$block_num
        bsf     $i1,$i1                         # ntz(block)
        bsf     $i3,$i3
        bsf     $i5,$i5
        shl     \$4,$i1                         # ntz(block) -> table offset
        shl     \$4,$i3
        shl     \$4,$i5

        sub     \$6,$blocks
        jc      .Locb_dec_short
        jmp     .Locb_dec_grandloop

.align  32
.Locb_dec_grandloop:
        movdqu  `16*0`($inp),$inout0            # load input
        movdqu  `16*1`($inp),$inout1
        movdqu  `16*2`($inp),$inout2
        movdqu  `16*3`($inp),$inout3
        movdqu  `16*4`($inp),$inout4
        movdqu  `16*5`($inp),$inout5
        lea     `16*6`($inp),$inp

        call    __ocb_decrypt6

        movups  $inout0,`16*0`($out)            # store output
        pxor    $inout0,$checksum               # accumulate checksum
        movups  $inout1,`16*1`($out)
        pxor    $inout1,$checksum
        movups  $inout2,`16*2`($out)
        pxor    $inout2,$checksum
        movups  $inout3,`16*3`($out)
        pxor    $inout3,$checksum
        movups  $inout4,`16*4`($out)
        pxor    $inout4,$checksum
        movups  $inout5,`16*5`($out)
        pxor    $inout5,$checksum
        lea     `16*6`($out),$out
        sub     \$6,$blocks
        jnc     .Locb_dec_grandloop

.Locb_dec_short:
        add     \$6,$blocks
        jz      .Locb_dec_done

        movdqu  `16*0`($inp),$inout0
        cmp     \$2,$blocks
        jb      .Locb_dec_one
        movdqu  `16*1`($inp),$inout1
        je      .Locb_dec_two

        movdqu  `16*2`($inp),$inout2
        cmp     \$4,$blocks
        jb      .Locb_dec_three
        movdqu  `16*3`($inp),$inout3
        je      .Locb_dec_four

        movdqu  `16*4`($inp),$inout4
        pxor    $inout5,$inout5

        call    __ocb_decrypt6

        movdqa  @offset[4],@offset[5]
        movups  $inout0,`16*0`($out)            # store output
        pxor    $inout0,$checksum               # accumulate checksum
        movups  $inout1,`16*1`($out)
        pxor    $inout1,$checksum
        movups  $inout2,`16*2`($out)
        pxor    $inout2,$checksum
        movups  $inout3,`16*3`($out)
        pxor    $inout3,$checksum
        movups  $inout4,`16*4`($out)
        pxor    $inout4,$checksum

        jmp     .Locb_dec_done

.align  16
.Locb_dec_one:
        movdqa  @offset[0],$inout5              # borrow

        call    __ocb_decrypt1

        movdqa  $inout5,@offset[5]
        movups  $inout0,`16*0`($out)            # store output
        xorps   $inout0,$checksum               # accumulate checksum
        jmp     .Locb_dec_done

.align  16
.Locb_dec_two:
        pxor    $inout2,$inout2
        pxor    $inout3,$inout3

        call    __ocb_decrypt4

        movdqa  @offset[1],@offset[5]
        movups  $inout0,`16*0`($out)            # store output
        xorps   $inout0,$checksum               # accumulate checksum
        movups  $inout1,`16*1`($out)
        xorps   $inout1,$checksum

        jmp     .Locb_dec_done

.align  16
.Locb_dec_three:
        pxor    $inout3,$inout3

        call    __ocb_decrypt4

        movdqa  @offset[2],@offset[5]
        movups  $inout0,`16*0`($out)            # store output
        xorps   $inout0,$checksum               # accumulate checksum
        movups  $inout1,`16*1`($out)
        xorps   $inout1,$checksum
        movups  $inout2,`16*2`($out)
        xorps   $inout2,$checksum

        jmp     .Locb_dec_done

.align  16
.Locb_dec_four:
        call    __ocb_decrypt4

        movdqa  @offset[3],@offset[5]
        movups  $inout0,`16*0`($out)            # store output
        pxor    $inout0,$checksum               # accumulate checksum
        movups  $inout1,`16*1`($out)
        pxor    $inout1,$checksum
        movups  $inout2,`16*2`($out)
        pxor    $inout2,$checksum
        movups  $inout3,`16*3`($out)
        pxor    $inout3,$checksum

.Locb_dec_done:
        pxor    $rndkey0,@offset[5]             # "remove" round[last]
        movdqu  $checksum,($checksum_p)         # store checksum
        movdqu  @offset[5],($offset_p)          # store last offset_i

        xorps   %xmm0,%xmm0                     # clear register bank
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
___
$code.=<<___ if (!$win64);
        pxor    %xmm6,%xmm6
        pxor    %xmm7,%xmm7
        pxor    %xmm8,%xmm8
        pxor    %xmm9,%xmm9
        pxor    %xmm10,%xmm10
        pxor    %xmm11,%xmm11
        pxor    %xmm12,%xmm12
        pxor    %xmm13,%xmm13
        pxor    %xmm14,%xmm14
        pxor    %xmm15,%xmm15
        lea     0x28(%rsp),%rax
.cfi_def_cfa    %rax,8
___
$code.=<<___ if ($win64);
        movaps  0x00(%rsp),%xmm6
        movaps  %xmm0,0x00(%rsp)                # clear stack
        movaps  0x10(%rsp),%xmm7
        movaps  %xmm0,0x10(%rsp)
        movaps  0x20(%rsp),%xmm8
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm9
        movaps  %xmm0,0x30(%rsp)
        movaps  0x40(%rsp),%xmm10
        movaps  %xmm0,0x40(%rsp)
        movaps  0x50(%rsp),%xmm11
        movaps  %xmm0,0x50(%rsp)
        movaps  0x60(%rsp),%xmm12
        movaps  %xmm0,0x60(%rsp)
        movaps  0x70(%rsp),%xmm13
        movaps  %xmm0,0x70(%rsp)
        movaps  0x80(%rsp),%xmm14
        movaps  %xmm0,0x80(%rsp)
        movaps  0x90(%rsp),%xmm15
        movaps  %xmm0,0x90(%rsp)
        lea     0xa0+0x28(%rsp),%rax
.Locb_dec_pop:
___
$code.=<<___;
        mov     -40(%rax),%r14
.cfi_restore    %r14
        mov     -32(%rax),%r13
.cfi_restore    %r13
        mov     -24(%rax),%r12
.cfi_restore    %r12
        mov     -16(%rax),%rbp
.cfi_restore    %rbp
        mov     -8(%rax),%rbx
.cfi_restore    %rbx
        lea     (%rax),%rsp
.cfi_def_cfa_register   %rsp
.Locb_dec_epilogue:
        ret
.cfi_endproc
.size   aesni_ocb_decrypt,.-aesni_ocb_decrypt

.type   __ocb_decrypt6,\@abi-omnipotent
.align  32
__ocb_decrypt6:
.cfi_startproc
         pxor           $rndkey0l,@offset[5]    # offset_i ^ round[0]
         movdqu         ($L_p,$i1),@offset[1]
         movdqa         @offset[0],@offset[2]
         movdqu         ($L_p,$i3),@offset[3]
         movdqa         @offset[0],@offset[4]
         pxor           @offset[5],@offset[0]
         movdqu         ($L_p,$i5),@offset[5]
         pxor           @offset[0],@offset[1]
        pxor            @offset[0],$inout0      # input ^ round[0] ^ offset_i
         pxor           @offset[1],@offset[2]
        pxor            @offset[1],$inout1
         pxor           @offset[2],@offset[3]
        pxor            @offset[2],$inout2
         pxor           @offset[3],@offset[4]
        pxor            @offset[3],$inout3
         pxor           @offset[4],@offset[5]
        pxor            @offset[4],$inout4
        pxor            @offset[5],$inout5
        $movkey         32($key_),$rndkey0

        lea             1($block_num),$i1       # even-numbered blocks
        lea             3($block_num),$i3
        lea             5($block_num),$i5
        add             \$6,$block_num
         pxor           $rndkey0l,@offset[0]    # offset_i ^ round[last]
        bsf             $i1,$i1                 # ntz(block)
        bsf             $i3,$i3
        bsf             $i5,$i5

        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
         pxor           $rndkey0l,@offset[1]
         pxor           $rndkey0l,@offset[2]
        aesdec          $rndkey1,$inout4
         pxor           $rndkey0l,@offset[3]
         pxor           $rndkey0l,@offset[4]
        aesdec          $rndkey1,$inout5
        $movkey         48($key_),$rndkey1
         pxor           $rndkey0l,@offset[5]

        aesdec          $rndkey0,$inout0
        aesdec          $rndkey0,$inout1
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
        aesdec          $rndkey0,$inout4
        aesdec          $rndkey0,$inout5
        $movkey         64($key_),$rndkey0
        shl             \$4,$i1                 # ntz(block) -> table offset
        shl             \$4,$i3
        jmp             .Locb_dec_loop6

.align  32
.Locb_dec_loop6:
        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        aesdec          $rndkey1,$inout4
        aesdec          $rndkey1,$inout5
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesdec          $rndkey0,$inout0
        aesdec          $rndkey0,$inout1
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
        aesdec          $rndkey0,$inout4
        aesdec          $rndkey0,$inout5
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_dec_loop6

        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        aesdec          $rndkey1,$inout4
        aesdec          $rndkey1,$inout5
        $movkey         16($key_),$rndkey1
        shl             \$4,$i5

        aesdeclast      @offset[0],$inout0
        movdqu          ($L_p),@offset[0]       # L_0 for all odd-numbered blocks
        mov             %r10,%rax               # restore twisted rounds
        aesdeclast      @offset[1],$inout1
        aesdeclast      @offset[2],$inout2
        aesdeclast      @offset[3],$inout3
        aesdeclast      @offset[4],$inout4
        aesdeclast      @offset[5],$inout5
        ret
.cfi_endproc
.size   __ocb_decrypt6,.-__ocb_decrypt6

.type   __ocb_decrypt4,\@abi-omnipotent
.align  32
__ocb_decrypt4:
.cfi_startproc
         pxor           $rndkey0l,@offset[5]    # offset_i ^ round[0]
         movdqu         ($L_p,$i1),@offset[1]
         movdqa         @offset[0],@offset[2]
         movdqu         ($L_p,$i3),@offset[3]
         pxor           @offset[5],@offset[0]
         pxor           @offset[0],@offset[1]
        pxor            @offset[0],$inout0      # input ^ round[0] ^ offset_i
         pxor           @offset[1],@offset[2]
        pxor            @offset[1],$inout1
         pxor           @offset[2],@offset[3]
        pxor            @offset[2],$inout2
        pxor            @offset[3],$inout3
        $movkey         32($key_),$rndkey0

         pxor           $rndkey0l,@offset[0]    # offset_i ^ round[last]
         pxor           $rndkey0l,@offset[1]
         pxor           $rndkey0l,@offset[2]
         pxor           $rndkey0l,@offset[3]

        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        $movkey         48($key_),$rndkey1

        aesdec          $rndkey0,$inout0
        aesdec          $rndkey0,$inout1
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
        $movkey         64($key_),$rndkey0
        jmp             .Locb_dec_loop4

.align  32
.Locb_dec_loop4:
        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesdec          $rndkey0,$inout0
        aesdec          $rndkey0,$inout1
        aesdec          $rndkey0,$inout2
        aesdec          $rndkey0,$inout3
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_dec_loop4

        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        $movkey         16($key_),$rndkey1
        mov             %r10,%rax               # restore twisted rounds

        aesdeclast      @offset[0],$inout0
        aesdeclast      @offset[1],$inout1
        aesdeclast      @offset[2],$inout2
        aesdeclast      @offset[3],$inout3
        ret
.cfi_endproc
.size   __ocb_decrypt4,.-__ocb_decrypt4

.type   __ocb_decrypt1,\@abi-omnipotent
.align  32
__ocb_decrypt1:
.cfi_startproc
         pxor           @offset[5],$inout5      # offset_i
         pxor           $rndkey0l,$inout5       # offset_i ^ round[0]
        pxor            $inout5,$inout0         # input ^ round[0] ^ offset_i
        $movkey         32($key_),$rndkey0

        aesdec          $rndkey1,$inout0
        $movkey         48($key_),$rndkey1
        pxor            $rndkey0l,$inout5       # offset_i ^ round[last]

        aesdec          $rndkey0,$inout0
        $movkey         64($key_),$rndkey0
        jmp             .Locb_dec_loop1

.align  32
.Locb_dec_loop1:
        aesdec          $rndkey1,$inout0
        $movkey         ($key,%rax),$rndkey1
        add             \$32,%rax

        aesdec          $rndkey0,$inout0
        $movkey         -16($key,%rax),$rndkey0
        jnz             .Locb_dec_loop1

        aesdec          $rndkey1,$inout0
        $movkey         16($key_),$rndkey1      # redundant in tail
        mov             %r10,%rax               # restore twisted rounds

        aesdeclast      $inout5,$inout0
        ret
.cfi_endproc
.size   __ocb_decrypt1,.-__ocb_decrypt1
___
} }}
\f
########################################################################
# void $PREFIX_cbc_encrypt (const void *inp, void *out,
#                           size_t length, const AES_KEY *key,
#                           unsigned char *ivp,const int enc);
{
my $frame_size = 0x10 + ($win64?0xa0:0);        # used in decrypt
my ($iv,$in0,$in1,$in2,$in3,$in4)=map("%xmm$_",(10..15));

$code.=<<___;
.globl  ${PREFIX}_cbc_encrypt
.type   ${PREFIX}_cbc_encrypt,\@function,6
.align  16
${PREFIX}_cbc_encrypt:
.cfi_startproc
        endbranch
        test    $len,$len               # check length
        jz      .Lcbc_ret

        mov     240($key),$rnds_        # key->rounds
        mov     $key,$key_              # backup $key
        test    %r9d,%r9d               # 6th argument
        jz      .Lcbc_decrypt
#--------------------------- CBC ENCRYPT ------------------------------#
        movups  ($ivp),$inout0          # load iv as initial state
        mov     $rnds_,$rounds
        cmp     \$16,$len
        jb      .Lcbc_enc_tail
        sub     \$16,$len
        jmp     .Lcbc_enc_loop
.align  16
.Lcbc_enc_loop:
        movups  ($inp),$inout1          # load input
        lea     16($inp),$inp
        #xorps  $inout1,$inout0
___
        &aesni_generate1("enc",$key,$rounds,$inout0,$inout1);
$code.=<<___;
        mov     $rnds_,$rounds          # restore $rounds
        mov     $key_,$key              # restore $key
        movups  $inout0,0($out)         # store output
        lea     16($out),$out
        sub     \$16,$len
        jnc     .Lcbc_enc_loop
        add     \$16,$len
        jnz     .Lcbc_enc_tail
         pxor   $rndkey0,$rndkey0       # clear register bank
         pxor   $rndkey1,$rndkey1
        movups  $inout0,($ivp)
         pxor   $inout0,$inout0
         pxor   $inout1,$inout1
        jmp     .Lcbc_ret

.Lcbc_enc_tail:
        mov     $len,%rcx       # zaps $key
        xchg    $inp,$out       # $inp is %rsi and $out is %rdi now
        .long   0x9066A4F3      # rep movsb
        mov     \$16,%ecx       # zero tail
        sub     $len,%rcx
        xor     %eax,%eax
        .long   0x9066AAF3      # rep stosb
        lea     -16(%rdi),%rdi  # rewind $out by 1 block
        mov     $rnds_,$rounds  # restore $rounds
        mov     %rdi,%rsi       # $inp and $out are the same
        mov     $key_,$key      # restore $key
        xor     $len,$len       # len=16
        jmp     .Lcbc_enc_loop  # one more spin
\f#--------------------------- CBC DECRYPT ------------------------------#
.align  16
.Lcbc_decrypt:
        cmp     \$16,$len
        jne     .Lcbc_decrypt_bulk

        # handle single block without allocating stack frame,
        # useful in ciphertext stealing mode
        movdqu  ($inp),$inout0          # load input
        movdqu  ($ivp),$inout1          # load iv
        movdqa  $inout0,$inout2         # future iv
___
        &aesni_generate1("dec",$key,$rnds_);
$code.=<<___;
         pxor   $rndkey0,$rndkey0       # clear register bank
         pxor   $rndkey1,$rndkey1
        movdqu  $inout2,($ivp)          # store iv
        xorps   $inout1,$inout0         # ^=iv
         pxor   $inout1,$inout1
        movups  $inout0,($out)          # store output
         pxor   $inout0,$inout0
        jmp     .Lcbc_ret
.align  16
.Lcbc_decrypt_bulk:
        lea     (%rsp),%r11             # frame pointer
.cfi_def_cfa_register   %r11
        push    %rbp
.cfi_push       %rbp
        sub     \$$frame_size,%rsp
        and     \$-16,%rsp      # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
        movaps  %xmm6,0x10(%rsp)
        movaps  %xmm7,0x20(%rsp)
        movaps  %xmm8,0x30(%rsp)
        movaps  %xmm9,0x40(%rsp)
        movaps  %xmm10,0x50(%rsp)
        movaps  %xmm11,0x60(%rsp)
        movaps  %xmm12,0x70(%rsp)
        movaps  %xmm13,0x80(%rsp)
        movaps  %xmm14,0x90(%rsp)
        movaps  %xmm15,0xa0(%rsp)
.Lcbc_decrypt_body:
___

my $inp_=$key_="%rbp";                  # reassign $key_

$code.=<<___;
        mov     $key,$key_              # [re-]backup $key [after reassignment]
        movups  ($ivp),$iv
        mov     $rnds_,$rounds
        cmp     \$0x50,$len
        jbe     .Lcbc_dec_tail

        $movkey ($key),$rndkey0
        movdqu  0x00($inp),$inout0      # load input
        movdqu  0x10($inp),$inout1
        movdqa  $inout0,$in0
        movdqu  0x20($inp),$inout2
        movdqa  $inout1,$in1
        movdqu  0x30($inp),$inout3
        movdqa  $inout2,$in2
        movdqu  0x40($inp),$inout4
        movdqa  $inout3,$in3
        movdqu  0x50($inp),$inout5
        movdqa  $inout4,$in4
        mov     OPENSSL_ia32cap_P+4(%rip),%r9d
        cmp     \$0x70,$len
        jbe     .Lcbc_dec_six_or_seven

        and     \$`1<<26|1<<22`,%r9d    # isolate XSAVE+MOVBE
        sub     \$0x50,$len             # $len is biased by -5*16
        cmp     \$`1<<22`,%r9d          # check for MOVBE without XSAVE
        je      .Lcbc_dec_loop6_enter   # [which denotes Atom Silvermont]
        sub     \$0x20,$len             # $len is biased by -7*16
        lea     0x70($key),$key         # size optimization
        jmp     .Lcbc_dec_loop8_enter
.align  16
.Lcbc_dec_loop8:
        movups  $inout7,($out)
        lea     0x10($out),$out
.Lcbc_dec_loop8_enter:
        movdqu          0x60($inp),$inout6
        pxor            $rndkey0,$inout0
        movdqu          0x70($inp),$inout7
        pxor            $rndkey0,$inout1
        $movkey         0x10-0x70($key),$rndkey1
        pxor            $rndkey0,$inout2
        mov             \$-1,$inp_
        cmp             \$0x70,$len     # is there at least 0x60 bytes ahead?
        pxor            $rndkey0,$inout3
        pxor            $rndkey0,$inout4
        pxor            $rndkey0,$inout5
        pxor            $rndkey0,$inout6

        aesdec          $rndkey1,$inout0
        pxor            $rndkey0,$inout7
        $movkey         0x20-0x70($key),$rndkey0
        aesdec          $rndkey1,$inout1
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        aesdec          $rndkey1,$inout4
        aesdec          $rndkey1,$inout5
        aesdec          $rndkey1,$inout6
        adc             \$0,$inp_
        and             \$128,$inp_
        aesdec          $rndkey1,$inout7
        add             $inp,$inp_
        $movkey         0x30-0x70($key),$rndkey1
___
for($i=1;$i<12;$i++) {
my $rndkeyx = ($i&1)?$rndkey0:$rndkey1;
$code.=<<___    if ($i==7);
        cmp             \$11,$rounds
___
$code.=<<___;
        aesdec          $rndkeyx,$inout0
        aesdec          $rndkeyx,$inout1
        aesdec          $rndkeyx,$inout2
        aesdec          $rndkeyx,$inout3
        aesdec          $rndkeyx,$inout4
        aesdec          $rndkeyx,$inout5
        aesdec          $rndkeyx,$inout6
        aesdec          $rndkeyx,$inout7
        $movkey         `0x30+0x10*$i`-0x70($key),$rndkeyx
___
$code.=<<___    if ($i<6 || (!($i&1) && $i>7));
        nop
___
$code.=<<___    if ($i==7);
        jb              .Lcbc_dec_done
___
$code.=<<___    if ($i==9);
        je              .Lcbc_dec_done
___
$code.=<<___    if ($i==11);
        jmp             .Lcbc_dec_done
___
}
$code.=<<___;
.align  16
.Lcbc_dec_done:
        aesdec          $rndkey1,$inout0
        aesdec          $rndkey1,$inout1
        pxor            $rndkey0,$iv
        pxor            $rndkey0,$in0
        aesdec          $rndkey1,$inout2
        aesdec          $rndkey1,$inout3
        pxor            $rndkey0,$in1
        pxor            $rndkey0,$in2
        aesdec          $rndkey1,$inout4
        aesdec          $rndkey1,$inout5
        pxor            $rndkey0,$in3
        pxor            $rndkey0,$in4
        aesdec          $rndkey1,$inout6
        aesdec          $rndkey1,$inout7
        movdqu          0x50($inp),$rndkey1

        aesdeclast      $iv,$inout0
        movdqu          0x60($inp),$iv          # borrow $iv
        pxor            $rndkey0,$rndkey1
        aesdeclast      $in0,$inout1
        pxor            $rndkey0,$iv
        movdqu          0x70($inp),$rndkey0     # next IV
        aesdeclast      $in1,$inout2
        lea             0x80($inp),$inp
        movdqu          0x00($inp_),$in0
        aesdeclast      $in2,$inout3
        aesdeclast      $in3,$inout4
        movdqu          0x10($inp_),$in1
        movdqu          0x20($inp_),$in2
        aesdeclast      $in4,$inout5
        aesdeclast      $rndkey1,$inout6
        movdqu          0x30($inp_),$in3
        movdqu          0x40($inp_),$in4
        aesdeclast      $iv,$inout7
        movdqa          $rndkey0,$iv            # return $iv
        movdqu          0x50($inp_),$rndkey1
        $movkey         -0x70($key),$rndkey0

        movups          $inout0,($out)          # store output
        movdqa          $in0,$inout0
        movups          $inout1,0x10($out)
        movdqa          $in1,$inout1
        movups          $inout2,0x20($out)
        movdqa          $in2,$inout2
        movups          $inout3,0x30($out)
        movdqa          $in3,$inout3
        movups          $inout4,0x40($out)
        movdqa          $in4,$inout4
        movups          $inout5,0x50($out)
        movdqa          $rndkey1,$inout5
        movups          $inout6,0x60($out)
        lea             0x70($out),$out

        sub     \$0x80,$len
        ja      .Lcbc_dec_loop8

        movaps  $inout7,$inout0
        lea     -0x70($key),$key
        add     \$0x70,$len
        jle     .Lcbc_dec_clear_tail_collected
        movups  $inout7,($out)
        lea     0x10($out),$out
        cmp     \$0x50,$len
        jbe     .Lcbc_dec_tail

        movaps  $in0,$inout0
.Lcbc_dec_six_or_seven:
        cmp     \$0x60,$len
        ja      .Lcbc_dec_seven

        movaps  $inout5,$inout6
        call    _aesni_decrypt6
        pxor    $iv,$inout0             # ^= IV
        movaps  $inout6,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
         pxor   $inout1,$inout1         # clear register bank
        pxor    $in2,$inout3
        movdqu  $inout2,0x20($out)
         pxor   $inout2,$inout2
        pxor    $in3,$inout4
        movdqu  $inout3,0x30($out)
         pxor   $inout3,$inout3
        pxor    $in4,$inout5
        movdqu  $inout4,0x40($out)
         pxor   $inout4,$inout4
        lea     0x50($out),$out
        movdqa  $inout5,$inout0
         pxor   $inout5,$inout5
        jmp     .Lcbc_dec_tail_collected

.align  16
.Lcbc_dec_seven:
        movups  0x60($inp),$inout6
        xorps   $inout7,$inout7
        call    _aesni_decrypt8
        movups  0x50($inp),$inout7
        pxor    $iv,$inout0             # ^= IV
        movups  0x60($inp),$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
         pxor   $inout1,$inout1         # clear register bank
        pxor    $in2,$inout3
        movdqu  $inout2,0x20($out)
         pxor   $inout2,$inout2
        pxor    $in3,$inout4
        movdqu  $inout3,0x30($out)
         pxor   $inout3,$inout3
        pxor    $in4,$inout5
        movdqu  $inout4,0x40($out)
         pxor   $inout4,$inout4
        pxor    $inout7,$inout6
        movdqu  $inout5,0x50($out)
         pxor   $inout5,$inout5
        lea     0x60($out),$out
        movdqa  $inout6,$inout0
         pxor   $inout6,$inout6
         pxor   $inout7,$inout7
        jmp     .Lcbc_dec_tail_collected

.align  16
.Lcbc_dec_loop6:
        movups  $inout5,($out)
        lea     0x10($out),$out
        movdqu  0x00($inp),$inout0      # load input
        movdqu  0x10($inp),$inout1
        movdqa  $inout0,$in0
        movdqu  0x20($inp),$inout2
        movdqa  $inout1,$in1
        movdqu  0x30($inp),$inout3
        movdqa  $inout2,$in2
        movdqu  0x40($inp),$inout4
        movdqa  $inout3,$in3
        movdqu  0x50($inp),$inout5
        movdqa  $inout4,$in4
.Lcbc_dec_loop6_enter:
        lea     0x60($inp),$inp
        movdqa  $inout5,$inout6

        call    _aesni_decrypt6

        pxor    $iv,$inout0             # ^= IV
        movdqa  $inout6,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
        pxor    $in2,$inout3
        movdqu  $inout2,0x20($out)
        pxor    $in3,$inout4
        mov     $key_,$key
        movdqu  $inout3,0x30($out)
        pxor    $in4,$inout5
        mov     $rnds_,$rounds
        movdqu  $inout4,0x40($out)
        lea     0x50($out),$out
        sub     \$0x60,$len
        ja      .Lcbc_dec_loop6

        movdqa  $inout5,$inout0
        add     \$0x50,$len
        jle     .Lcbc_dec_clear_tail_collected
        movups  $inout5,($out)
        lea     0x10($out),$out

.Lcbc_dec_tail:
        movups  ($inp),$inout0
        sub     \$0x10,$len
        jbe     .Lcbc_dec_one           # $len is 1*16 or less

        movups  0x10($inp),$inout1
        movaps  $inout0,$in0
        sub     \$0x10,$len
        jbe     .Lcbc_dec_two           # $len is 2*16 or less

        movups  0x20($inp),$inout2
        movaps  $inout1,$in1
        sub     \$0x10,$len
        jbe     .Lcbc_dec_three         # $len is 3*16 or less

        movups  0x30($inp),$inout3
        movaps  $inout2,$in2
        sub     \$0x10,$len
        jbe     .Lcbc_dec_four          # $len is 4*16 or less

        movups  0x40($inp),$inout4      # $len is 5*16 or less
        movaps  $inout3,$in3
        movaps  $inout4,$in4
        xorps   $inout5,$inout5
        call    _aesni_decrypt6
        pxor    $iv,$inout0
        movaps  $in4,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
         pxor   $inout1,$inout1         # clear register bank
        pxor    $in2,$inout3
        movdqu  $inout2,0x20($out)
         pxor   $inout2,$inout2
        pxor    $in3,$inout4
        movdqu  $inout3,0x30($out)
         pxor   $inout3,$inout3
        lea     0x40($out),$out
        movdqa  $inout4,$inout0
         pxor   $inout4,$inout4
         pxor   $inout5,$inout5
        sub     \$0x10,$len
        jmp     .Lcbc_dec_tail_collected

.align  16
.Lcbc_dec_one:
        movaps  $inout0,$in0
___
        &aesni_generate1("dec",$key,$rounds);
$code.=<<___;
        xorps   $iv,$inout0
        movaps  $in0,$iv
        jmp     .Lcbc_dec_tail_collected
.align  16
.Lcbc_dec_two:
        movaps  $inout1,$in1
        call    _aesni_decrypt2
        pxor    $iv,$inout0
        movaps  $in1,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        movdqa  $inout1,$inout0
         pxor   $inout1,$inout1         # clear register bank
        lea     0x10($out),$out
        jmp     .Lcbc_dec_tail_collected
.align  16
.Lcbc_dec_three:
        movaps  $inout2,$in2
        call    _aesni_decrypt3
        pxor    $iv,$inout0
        movaps  $in2,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
         pxor   $inout1,$inout1         # clear register bank
        movdqa  $inout2,$inout0
         pxor   $inout2,$inout2
        lea     0x20($out),$out
        jmp     .Lcbc_dec_tail_collected
.align  16
.Lcbc_dec_four:
        movaps  $inout3,$in3
        call    _aesni_decrypt4
        pxor    $iv,$inout0
        movaps  $in3,$iv
        pxor    $in0,$inout1
        movdqu  $inout0,($out)
        pxor    $in1,$inout2
        movdqu  $inout1,0x10($out)
         pxor   $inout1,$inout1         # clear register bank
        pxor    $in2,$inout3
        movdqu  $inout2,0x20($out)
         pxor   $inout2,$inout2
        movdqa  $inout3,$inout0
         pxor   $inout3,$inout3
        lea     0x30($out),$out
        jmp     .Lcbc_dec_tail_collected

.align  16
.Lcbc_dec_clear_tail_collected:
        pxor    $inout1,$inout1         # clear register bank
        pxor    $inout2,$inout2
        pxor    $inout3,$inout3
___
$code.=<<___ if (!$win64);
        pxor    $inout4,$inout4         # %xmm6..9
        pxor    $inout5,$inout5
        pxor    $inout6,$inout6
        pxor    $inout7,$inout7
___
$code.=<<___;
.Lcbc_dec_tail_collected:
        movups  $iv,($ivp)
        and     \$15,$len
        jnz     .Lcbc_dec_tail_partial
        movups  $inout0,($out)
        pxor    $inout0,$inout0
        jmp     .Lcbc_dec_ret
.align  16
.Lcbc_dec_tail_partial:
        movaps  $inout0,(%rsp)
        pxor    $inout0,$inout0
        mov     \$16,%rcx
        mov     $out,%rdi
        sub     $len,%rcx
        lea     (%rsp),%rsi
        .long   0x9066A4F3              # rep movsb
        movdqa  $inout0,(%rsp)

.Lcbc_dec_ret:
        xorps   $rndkey0,$rndkey0       # %xmm0
        pxor    $rndkey1,$rndkey1
___
$code.=<<___ if ($win64);
        movaps  0x10(%rsp),%xmm6
        movaps  %xmm0,0x10(%rsp)        # clear stack
        movaps  0x20(%rsp),%xmm7
        movaps  %xmm0,0x20(%rsp)
        movaps  0x30(%rsp),%xmm8
        movaps  %xmm0,0x30(%rsp)
        movaps  0x40(%rsp),%xmm9
        movaps  %xmm0,0x40(%rsp)
        movaps  0x50(%rsp),%xmm10
        movaps  %xmm0,0x50(%rsp)
        movaps  0x60(%rsp),%xmm11
        movaps  %xmm0,0x60(%rsp)
        movaps  0x70(%rsp),%xmm12
        movaps  %xmm0,0x70(%rsp)
        movaps  0x80(%rsp),%xmm13
        movaps  %xmm0,0x80(%rsp)
        movaps  0x90(%rsp),%xmm14
        movaps  %xmm0,0x90(%rsp)
        movaps  0xa0(%rsp),%xmm15
        movaps  %xmm0,0xa0(%rsp)
___
$code.=<<___;
        mov     -8(%r11),%rbp
.cfi_restore    %rbp
        lea     (%r11),%rsp
.cfi_def_cfa_register   %rsp
.Lcbc_ret:
        ret
.cfi_endproc
.size   ${PREFIX}_cbc_encrypt,.-${PREFIX}_cbc_encrypt
___
} \f
# int ${PREFIX}_set_decrypt_key(const unsigned char *inp,
#                               int bits, AES_KEY *key)
#
# input:        $inp    user-supplied key
#               $bits   $inp length in bits
#               $key    pointer to key schedule
# output:       %eax    0 denoting success, -1 or -2 - failure (see C)
#               *$key   key schedule
#
{ my ($inp,$bits,$key) = @_4args;
  $bits =~ s/%r/%e/;

$code.=<<___;
.globl  ${PREFIX}_set_decrypt_key
.type   ${PREFIX}_set_decrypt_key,\@abi-omnipotent
.align  16
${PREFIX}_set_decrypt_key:
.cfi_startproc
        .byte   0x48,0x83,0xEC,0x08     # sub rsp,8
.cfi_adjust_cfa_offset  8
        call    __aesni_set_encrypt_key
        shl     \$4,$bits               # rounds-1 after _aesni_set_encrypt_key
        test    %eax,%eax
        jnz     .Ldec_key_ret
        lea     16($key,$bits),$inp     # points at the end of key schedule

        $movkey ($key),%xmm0            # just swap
        $movkey ($inp),%xmm1
        $movkey %xmm0,($inp)
        $movkey %xmm1,($key)
        lea     16($key),$key
        lea     -16($inp),$inp

.Ldec_key_inverse:
        $movkey ($key),%xmm0            # swap and inverse
        $movkey ($inp),%xmm1
        aesimc  %xmm0,%xmm0
        aesimc  %xmm1,%xmm1
        lea     16($key),$key
        lea     -16($inp),$inp
        $movkey %xmm0,16($inp)
        $movkey %xmm1,-16($key)
        cmp     $key,$inp
        ja      .Ldec_key_inverse

        $movkey ($key),%xmm0            # inverse middle
        aesimc  %xmm0,%xmm0
        pxor    %xmm1,%xmm1
        $movkey %xmm0,($inp)
        pxor    %xmm0,%xmm0
.Ldec_key_ret:
        add     \$8,%rsp
.cfi_adjust_cfa_offset  -8
        ret
.cfi_endproc
.LSEH_end_set_decrypt_key:
.size   ${PREFIX}_set_decrypt_key,.-${PREFIX}_set_decrypt_key
___
\f
# This is based on submission from Intel by
#       Huang Ying
#       Vinodh Gopal
#       Kahraman Akdemir
#
# Aggressively optimized in respect to aeskeygenassist's critical path
# and is contained in %xmm0-5 to meet Win64 ABI requirement.
#
# int ${PREFIX}_set_encrypt_key(const unsigned char *inp,
#                               int bits, AES_KEY * const key);
#
# input:        $inp    user-supplied key
#               $bits   $inp length in bits
#               $key    pointer to key schedule
# output:       %eax    0 denoting success, -1 or -2 - failure (see C)
#               $bits   rounds-1 (used in aesni_set_decrypt_key)
#               *$key   key schedule
#               $key    pointer to key schedule (used in
#                       aesni_set_decrypt_key)
#
# Subroutine is frame-less, which means that only volatile registers
# are used. Note that it's declared "abi-omnipotent", which means that
# amount of volatile registers is smaller on Windows.
#
$code.=<<___;
.globl  ${PREFIX}_set_encrypt_key
.type   ${PREFIX}_set_encrypt_key,\@abi-omnipotent
.align  16
${PREFIX}_set_encrypt_key:
__aesni_set_encrypt_key:
.cfi_startproc
        .byte   0x48,0x83,0xEC,0x08     # sub rsp,8
.cfi_adjust_cfa_offset  8
        mov     \$-1,%rax
        test    $inp,$inp
        jz      .Lenc_key_ret
        test    $key,$key
        jz      .Lenc_key_ret

        mov     \$`1<<28|1<<11`,%r10d   # AVX and XOP bits
        movups  ($inp),%xmm0            # pull first 128 bits of *userKey
        xorps   %xmm4,%xmm4             # low dword of xmm4 is assumed 0
        and     OPENSSL_ia32cap_P+4(%rip),%r10d
        lea     16($key),%rax           # %rax is used as modifiable copy of $key
        cmp     \$256,$bits
        je      .L14rounds
        cmp     \$192,$bits
        je      .L12rounds
        cmp     \$128,$bits
        jne     .Lbad_keybits

.L10rounds:
        mov     \$9,$bits                       # 10 rounds for 128-bit key
        cmp     \$`1<<28`,%r10d                 # AVX, bit no XOP
        je      .L10rounds_alt

        $movkey %xmm0,($key)                    # round 0
        aeskeygenassist \$0x1,%xmm0,%xmm1       # round 1
        call            .Lkey_expansion_128_cold
        aeskeygenassist \$0x2,%xmm0,%xmm1       # round 2
        call            .Lkey_expansion_128
        aeskeygenassist \$0x4,%xmm0,%xmm1       # round 3
        call            .Lkey_expansion_128
        aeskeygenassist \$0x8,%xmm0,%xmm1       # round 4
        call            .Lkey_expansion_128
        aeskeygenassist \$0x10,%xmm0,%xmm1      # round 5
        call            .Lkey_expansion_128
        aeskeygenassist \$0x20,%xmm0,%xmm1      # round 6
        call            .Lkey_expansion_128
        aeskeygenassist \$0x40,%xmm0,%xmm1      # round 7
        call            .Lkey_expansion_128
        aeskeygenassist \$0x80,%xmm0,%xmm1      # round 8
        call            .Lkey_expansion_128
        aeskeygenassist \$0x1b,%xmm0,%xmm1      # round 9
        call            .Lkey_expansion_128
        aeskeygenassist \$0x36,%xmm0,%xmm1      # round 10
        call            .Lkey_expansion_128
        $movkey %xmm0,(%rax)
        mov     $bits,80(%rax)  # 240(%rdx)
        xor     %eax,%eax
        jmp     .Lenc_key_ret

.align  16
.L10rounds_alt:
        movdqa  .Lkey_rotate(%rip),%xmm5
        mov     \$8,%r10d
        movdqa  .Lkey_rcon1(%rip),%xmm4
        movdqa  %xmm0,%xmm2
        movdqu  %xmm0,($key)
        jmp     .Loop_key128

.align  16
.Loop_key128:
        pshufb          %xmm5,%xmm0
        aesenclast      %xmm4,%xmm0
        pslld           \$1,%xmm4
        lea             16(%rax),%rax

        movdqa          %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm3,%xmm2

        pxor            %xmm2,%xmm0
        movdqu          %xmm0,-16(%rax)
        movdqa          %xmm0,%xmm2

        dec     %r10d
        jnz     .Loop_key128

        movdqa          .Lkey_rcon1b(%rip),%xmm4

        pshufb          %xmm5,%xmm0
        aesenclast      %xmm4,%xmm0
        pslld           \$1,%xmm4

        movdqa          %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm3,%xmm2

        pxor            %xmm2,%xmm0
        movdqu          %xmm0,(%rax)

        movdqa          %xmm0,%xmm2
        pshufb          %xmm5,%xmm0
        aesenclast      %xmm4,%xmm0

        movdqa          %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm2,%xmm3
        pslldq          \$4,%xmm2
        pxor            %xmm3,%xmm2

        pxor            %xmm2,%xmm0
        movdqu          %xmm0,16(%rax)

        mov     $bits,96(%rax)  # 240($key)
        xor     %eax,%eax
        jmp     .Lenc_key_ret

.align  16
.L12rounds:
        movq    16($inp),%xmm2                  # remaining 1/3 of *userKey
        mov     \$11,$bits                      # 12 rounds for 192
        cmp     \$`1<<28`,%r10d                 # AVX, but no XOP
        je      .L12rounds_alt

        $movkey %xmm0,($key)                    # round 0
        aeskeygenassist \$0x1,%xmm2,%xmm1       # round 1,2
        call            .Lkey_expansion_192a_cold
        aeskeygenassist \$0x2,%xmm2,%xmm1       # round 2,3
        call            .Lkey_expansion_192b
        aeskeygenassist \$0x4,%xmm2,%xmm1       # round 4,5
        call            .Lkey_expansion_192a
        aeskeygenassist \$0x8,%xmm2,%xmm1       # round 5,6
        call            .Lkey_expansion_192b
        aeskeygenassist \$0x10,%xmm2,%xmm1      # round 7,8
        call            .Lkey_expansion_192a
        aeskeygenassist \$0x20,%xmm2,%xmm1      # round 8,9
        call            .Lkey_expansion_192b
        aeskeygenassist \$0x40,%xmm2,%xmm1      # round 10,11
        call            .Lkey_expansion_192a
        aeskeygenassist \$0x80,%xmm2,%xmm1      # round 11,12
        call            .Lkey_expansion_192b
        $movkey %xmm0,(%rax)
        mov     $bits,48(%rax)  # 240(%rdx)
        xor     %rax, %rax
        jmp     .Lenc_key_ret

.align  16
.L12rounds_alt:
        movdqa  .Lkey_rotate192(%rip),%xmm5
        movdqa  .Lkey_rcon1(%rip),%xmm4
        mov     \$8,%r10d
        movdqu  %xmm0,($key)
        jmp     .Loop_key192

.align  16
.Loop_key192:
        movq            %xmm2,0(%rax)
        movdqa          %xmm2,%xmm1
        pshufb          %xmm5,%xmm2
        aesenclast      %xmm4,%xmm2
        pslld           \$1, %xmm4
        lea             24(%rax),%rax

        movdqa          %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm3,%xmm0

        pshufd          \$0xff,%xmm0,%xmm3
        pxor            %xmm1,%xmm3
        pslldq          \$4,%xmm1
        pxor            %xmm1,%xmm3

        pxor            %xmm2,%xmm0
        pxor            %xmm3,%xmm2
        movdqu          %xmm0,-16(%rax)

        dec     %r10d
        jnz     .Loop_key192

        mov     $bits,32(%rax)  # 240($key)
        xor     %eax,%eax
        jmp     .Lenc_key_ret

.align  16
.L14rounds:
        movups  16($inp),%xmm2                  # remaining half of *userKey
        mov     \$13,$bits                      # 14 rounds for 256
        lea     16(%rax),%rax
        cmp     \$`1<<28`,%r10d                 # AVX, but no XOP
        je      .L14rounds_alt

        $movkey %xmm0,($key)                    # round 0
        $movkey %xmm2,16($key)                  # round 1
        aeskeygenassist \$0x1,%xmm2,%xmm1       # round 2
        call            .Lkey_expansion_256a_cold
        aeskeygenassist \$0x1,%xmm0,%xmm1       # round 3
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x2,%xmm2,%xmm1       # round 4
        call            .Lkey_expansion_256a
        aeskeygenassist \$0x2,%xmm0,%xmm1       # round 5
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x4,%xmm2,%xmm1       # round 6
        call            .Lkey_expansion_256a
        aeskeygenassist \$0x4,%xmm0,%xmm1       # round 7
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x8,%xmm2,%xmm1       # round 8
        call            .Lkey_expansion_256a
        aeskeygenassist \$0x8,%xmm0,%xmm1       # round 9
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x10,%xmm2,%xmm1      # round 10
        call            .Lkey_expansion_256a
        aeskeygenassist \$0x10,%xmm0,%xmm1      # round 11
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x20,%xmm2,%xmm1      # round 12
        call            .Lkey_expansion_256a
        aeskeygenassist \$0x20,%xmm0,%xmm1      # round 13
        call            .Lkey_expansion_256b
        aeskeygenassist \$0x40,%xmm2,%xmm1      # round 14
        call            .Lkey_expansion_256a
        $movkey %xmm0,(%rax)
        mov     $bits,16(%rax)  # 240(%rdx)
        xor     %rax,%rax
        jmp     .Lenc_key_ret

.align  16
.L14rounds_alt:
        movdqa  .Lkey_rotate(%rip),%xmm5
        movdqa  .Lkey_rcon1(%rip),%xmm4
        mov     \$7,%r10d
        movdqu  %xmm0,0($key)
        movdqa  %xmm2,%xmm1
        movdqu  %xmm2,16($key)
        jmp     .Loop_key256

.align  16
.Loop_key256:
        pshufb          %xmm5,%xmm2
        aesenclast      %xmm4,%xmm2

        movdqa          %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm0,%xmm3
        pslldq          \$4,%xmm0
        pxor            %xmm3,%xmm0
        pslld           \$1,%xmm4

        pxor            %xmm2,%xmm0
        movdqu          %xmm0,(%rax)

        dec     %r10d
        jz      .Ldone_key256

        pshufd          \$0xff,%xmm0,%xmm2
        pxor            %xmm3,%xmm3
        aesenclast      %xmm3,%xmm2

        movdqa          %xmm1,%xmm3
        pslldq          \$4,%xmm1
        pxor            %xmm1,%xmm3
        pslldq          \$4,%xmm1
        pxor            %xmm1,%xmm3
        pslldq          \$4,%xmm1
        pxor            %xmm3,%xmm1

        pxor            %xmm1,%xmm2
        movdqu          %xmm2,16(%rax)
        lea             32(%rax),%rax
        movdqa          %xmm2,%xmm1

        jmp     .Loop_key256

.Ldone_key256:
        mov     $bits,16(%rax)  # 240($key)
        xor     %eax,%eax
        jmp     .Lenc_key_ret

.align  16
.Lbad_keybits:
        mov     \$-2,%rax
.Lenc_key_ret:
        pxor    %xmm0,%xmm0
        pxor    %xmm1,%xmm1
        pxor    %xmm2,%xmm2
        pxor    %xmm3,%xmm3
        pxor    %xmm4,%xmm4
        pxor    %xmm5,%xmm5
        add     \$8,%rsp
.cfi_adjust_cfa_offset  -8
        ret
.LSEH_end_set_encrypt_key:
\f
.align  16
.Lkey_expansion_128:
        $movkey %xmm0,(%rax)
        lea     16(%rax),%rax
.Lkey_expansion_128_cold:
        shufps  \$0b00010000,%xmm0,%xmm4
        xorps   %xmm4, %xmm0
        shufps  \$0b10001100,%xmm0,%xmm4
        xorps   %xmm4, %xmm0
        shufps  \$0b11111111,%xmm1,%xmm1        # critical path
        xorps   %xmm1,%xmm0
        ret

.align 16
.Lkey_expansion_192a:
        $movkey %xmm0,(%rax)
        lea     16(%rax),%rax
.Lkey_expansion_192a_cold:
        movaps  %xmm2, %xmm5
.Lkey_expansion_192b_warm:
        shufps  \$0b00010000,%xmm0,%xmm4
        movdqa  %xmm2,%xmm3
        xorps   %xmm4,%xmm0
        shufps  \$0b10001100,%xmm0,%xmm4
        pslldq  \$4,%xmm3
        xorps   %xmm4,%xmm0
        pshufd  \$0b01010101,%xmm1,%xmm1        # critical path
        pxor    %xmm3,%xmm2
        pxor    %xmm1,%xmm0
        pshufd  \$0b11111111,%xmm0,%xmm3
        pxor    %xmm3,%xmm2
        ret

.align 16
.Lkey_expansion_192b:
        movaps  %xmm0,%xmm3
        shufps  \$0b01000100,%xmm0,%xmm5
        $movkey %xmm5,(%rax)
        shufps  \$0b01001110,%xmm2,%xmm3
        $movkey %xmm3,16(%rax)
        lea     32(%rax),%rax
        jmp     .Lkey_expansion_192b_warm

.align  16
.Lkey_expansion_256a:
        $movkey %xmm2,(%rax)
        lea     16(%rax),%rax
.Lkey_expansion_256a_cold:
        shufps  \$0b00010000,%xmm0,%xmm4
        xorps   %xmm4,%xmm0
        shufps  \$0b10001100,%xmm0,%xmm4
        xorps   %xmm4,%xmm0
        shufps  \$0b11111111,%xmm1,%xmm1        # critical path
        xorps   %xmm1,%xmm0
        ret

.align 16
.Lkey_expansion_256b:
        $movkey %xmm0,(%rax)
        lea     16(%rax),%rax

        shufps  \$0b00010000,%xmm2,%xmm4
        xorps   %xmm4,%xmm2
        shufps  \$0b10001100,%xmm2,%xmm4
        xorps   %xmm4,%xmm2
        shufps  \$0b10101010,%xmm1,%xmm1        # critical path
        xorps   %xmm1,%xmm2
        ret
.cfi_endproc
.size   ${PREFIX}_set_encrypt_key,.-${PREFIX}_set_encrypt_key
.size   __aesni_set_encrypt_key,.-__aesni_set_encrypt_key
___
}
\f
$code.=<<___;
.align  64
.Lbswap_mask:
        .byte   15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0
.Lincrement32:
        .long   6,6,6,0
.Lincrement64:
        .long   1,0,0,0
.Lxts_magic:
        .long   0x87,0,1,0
.Lincrement1:
        .byte   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1
.Lkey_rotate:
        .long   0x0c0f0e0d,0x0c0f0e0d,0x0c0f0e0d,0x0c0f0e0d
.Lkey_rotate192:
        .long   0x04070605,0x04070605,0x04070605,0x04070605
.Lkey_rcon1:
        .long   1,1,1,1
.Lkey_rcon1b:
        .long   0x1b,0x1b,0x1b,0x1b

.asciz  "AES for Intel AES-NI, CRYPTOGAMS by <appro\@openssl.org>"
.align  64
___

# EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
#               CONTEXT *context,DISPATCHER_CONTEXT *disp)
if ($win64) {
$rec="%rcx";
$frame="%rdx";
$context="%r8";
$disp="%r9";

$code.=<<___;
.extern __imp_RtlVirtualUnwind
___
$code.=<<___ if ($PREFIX eq "aesni");
.type   ecb_ccm64_se_handler,\@abi-omnipotent
.align  16
ecb_ccm64_se_handler:
        push    %rsi
        push    %rdi
        push    %rbx
        push    %rbp
        push    %r12
        push    %r13
        push    %r14
        push    %r15
        pushfq
        sub     \$64,%rsp

        mov     120($context),%rax      # pull context->Rax
        mov     248($context),%rbx      # pull context->Rip

        mov     8($disp),%rsi           # disp->ImageBase
        mov     56($disp),%r11          # disp->HandlerData

        mov     0(%r11),%r10d           # HandlerData[0]
        lea     (%rsi,%r10),%r10        # prologue label
        cmp     %r10,%rbx               # context->Rip<prologue label
        jb      .Lcommon_seh_tail

        mov     152($context),%rax      # pull context->Rsp

        mov     4(%r11),%r10d           # HandlerData[1]
        lea     (%rsi,%r10),%r10        # epilogue label
        cmp     %r10,%rbx               # context->Rip>=epilogue label
        jae     .Lcommon_seh_tail

        lea     0(%rax),%rsi            # %xmm save area
        lea     512($context),%rdi      # &context.Xmm6
        mov     \$8,%ecx                # 4*sizeof(%xmm0)/sizeof(%rax)
        .long   0xa548f3fc              # cld; rep movsq
        lea     0x58(%rax),%rax         # adjust stack pointer

        jmp     .Lcommon_seh_tail
.size   ecb_ccm64_se_handler,.-ecb_ccm64_se_handler

.type   ctr_xts_se_handler,\@abi-omnipotent
.align  16
ctr_xts_se_handler:
        push    %rsi
        push    %rdi
        push    %rbx
        push    %rbp
        push    %r12
        push    %r13
        push    %r14
        push    %r15
        pushfq
        sub     \$64,%rsp

        mov     120($context),%rax      # pull context->Rax
        mov     248($context),%rbx      # pull context->Rip

        mov     8($disp),%rsi           # disp->ImageBase
        mov     56($disp),%r11          # disp->HandlerData

        mov     0(%r11),%r10d           # HandlerData[0]
        lea     (%rsi,%r10),%r10        # prologue label
        cmp     %r10,%rbx               # context->Rip<prologue label
        jb      .Lcommon_seh_tail

        mov     152($context),%rax      # pull context->Rsp

        mov     4(%r11),%r10d           # HandlerData[1]
        lea     (%rsi,%r10),%r10        # epilogue label
        cmp     %r10,%rbx               # context->Rip>=epilogue label
        jae     .Lcommon_seh_tail

        mov     208($context),%rax      # pull context->R11

        lea     -0xa8(%rax),%rsi        # %xmm save area
        lea     512($context),%rdi      # & context.Xmm6
        mov     \$20,%ecx               # 10*sizeof(%xmm0)/sizeof(%rax)
        .long   0xa548f3fc              # cld; rep movsq

        mov     -8(%rax),%rbp           # restore saved %rbp
        mov     %rbp,160($context)      # restore context->Rbp
        jmp     .Lcommon_seh_tail
.size   ctr_xts_se_handler,.-ctr_xts_se_handler

.type   ocb_se_handler,\@abi-omnipotent
.align  16
ocb_se_handler:
        push    %rsi
        push    %rdi
        push    %rbx
        push    %rbp
        push    %r12
        push    %r13
        push    %r14
        push    %r15
        pushfq
        sub     \$64,%rsp

        mov     120($context),%rax      # pull context->Rax
        mov     248($context),%rbx      # pull context->Rip

        mov     8($disp),%rsi           # disp->ImageBase
        mov     56($disp),%r11          # disp->HandlerData

        mov     0(%r11),%r10d           # HandlerData[0]
        lea     (%rsi,%r10),%r10        # prologue label
        cmp     %r10,%rbx               # context->Rip<prologue label
        jb      .Lcommon_seh_tail

        mov     4(%r11),%r10d           # HandlerData[1]
        lea     (%rsi,%r10),%r10        # epilogue label
        cmp     %r10,%rbx               # context->Rip>=epilogue label
        jae     .Lcommon_seh_tail

        mov     8(%r11),%r10d           # HandlerData[2]
        lea     (%rsi,%r10),%r10
        cmp     %r10,%rbx               # context->Rip>=pop label
        jae     .Locb_no_xmm

        mov     152($context),%rax      # pull context->Rsp

        lea     (%rax),%rsi             # %xmm save area
        lea     512($context),%rdi      # & context.Xmm6
        mov     \$20,%ecx               # 10*sizeof(%xmm0)/sizeof(%rax)
        .long   0xa548f3fc              # cld; rep movsq
        lea     0xa0+0x28(%rax),%rax

.Locb_no_xmm:
        mov     -8(%rax),%rbx
        mov     -16(%rax),%rbp
        mov     -24(%rax),%r12
        mov     -32(%rax),%r13
        mov     -40(%rax),%r14

        mov     %rbx,144($context)      # restore context->Rbx
        mov     %rbp,160($context)      # restore context->Rbp
        mov     %r12,216($context)      # restore context->R12
        mov     %r13,224($context)      # restore context->R13
        mov     %r14,232($context)      # restore context->R14

        jmp     .Lcommon_seh_tail
.size   ocb_se_handler,.-ocb_se_handler
___
$code.=<<___;
.type   cbc_se_handler,\@abi-omnipotent
.align  16
cbc_se_handler:
        push    %rsi
        push    %rdi
        push    %rbx
        push    %rbp
        push    %r12
        push    %r13
        push    %r14
        push    %r15
        pushfq
        sub     \$64,%rsp

        mov     152($context),%rax      # pull context->Rsp
        mov     248($context),%rbx      # pull context->Rip

        lea     .Lcbc_decrypt_bulk(%rip),%r10
        cmp     %r10,%rbx               # context->Rip<"prologue" label
        jb      .Lcommon_seh_tail

        mov     120($context),%rax      # pull context->Rax

        lea     .Lcbc_decrypt_body(%rip),%r10
        cmp     %r10,%rbx               # context->Rip<cbc_decrypt_body
        jb      .Lcommon_seh_tail

        mov     152($context),%rax      # pull context->Rsp

        lea     .Lcbc_ret(%rip),%r10
        cmp     %r10,%rbx               # context->Rip>="epilogue" label
        jae     .Lcommon_seh_tail

        lea     16(%rax),%rsi           # %xmm save area
        lea     512($context),%rdi      # &context.Xmm6
        mov     \$20,%ecx               # 10*sizeof(%xmm0)/sizeof(%rax)
        .long   0xa548f3fc              # cld; rep movsq

        mov     208($context),%rax      # pull context->R11

        mov     -8(%rax),%rbp           # restore saved %rbp
        mov     %rbp,160($context)      # restore context->Rbp

.Lcommon_seh_tail:
        mov     8(%rax),%rdi
        mov     16(%rax),%rsi
        mov     %rax,152($context)      # restore context->Rsp
        mov     %rsi,168($context)      # restore context->Rsi
        mov     %rdi,176($context)      # restore context->Rdi

        mov     40($disp),%rdi          # disp->ContextRecord
        mov     $context,%rsi           # context
        mov     \$154,%ecx              # sizeof(CONTEXT)
        .long   0xa548f3fc              # cld; rep movsq

        mov     $disp,%rsi
        xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
        mov     8(%rsi),%rdx            # arg2, disp->ImageBase
        mov     0(%rsi),%r8             # arg3, disp->ControlPc
        mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
        mov     40(%rsi),%r10           # disp->ContextRecord
        lea     56(%rsi),%r11           # &disp->HandlerData
        lea     24(%rsi),%r12           # &disp->EstablisherFrame
        mov     %r10,32(%rsp)           # arg5
        mov     %r11,40(%rsp)           # arg6
        mov     %r12,48(%rsp)           # arg7
        mov     %rcx,56(%rsp)           # arg8, (NULL)
        call    *__imp_RtlVirtualUnwind(%rip)

        mov     \$1,%eax                # ExceptionContinueSearch
        add     \$64,%rsp
        popfq
        pop     %r15
        pop     %r14
        pop     %r13
        pop     %r12
        pop     %rbp
        pop     %rbx
        pop     %rdi
        pop     %rsi
        ret
.size   cbc_se_handler,.-cbc_se_handler

.section        .pdata
.align  4
___
$code.=<<___ if ($PREFIX eq "aesni");
        .rva    .LSEH_begin_aesni_ecb_encrypt
        .rva    .LSEH_end_aesni_ecb_encrypt
        .rva    .LSEH_info_ecb

        .rva    .LSEH_begin_aesni_ccm64_encrypt_blocks
        .rva    .LSEH_end_aesni_ccm64_encrypt_blocks
        .rva    .LSEH_info_ccm64_enc

        .rva    .LSEH_begin_aesni_ccm64_decrypt_blocks
        .rva    .LSEH_end_aesni_ccm64_decrypt_blocks
        .rva    .LSEH_info_ccm64_dec

        .rva    .LSEH_begin_aesni_ctr32_encrypt_blocks
        .rva    .LSEH_end_aesni_ctr32_encrypt_blocks
        .rva    .LSEH_info_ctr32

        .rva    .LSEH_begin_aesni_xts_encrypt
        .rva    .LSEH_end_aesni_xts_encrypt
        .rva    .LSEH_info_xts_enc

        .rva    .LSEH_begin_aesni_xts_decrypt
        .rva    .LSEH_end_aesni_xts_decrypt
        .rva    .LSEH_info_xts_dec

        .rva    .LSEH_begin_aesni_ocb_encrypt
        .rva    .LSEH_end_aesni_ocb_encrypt
        .rva    .LSEH_info_ocb_enc

        .rva    .LSEH_begin_aesni_ocb_decrypt
        .rva    .LSEH_end_aesni_ocb_decrypt
        .rva    .LSEH_info_ocb_dec
___
$code.=<<___;
        .rva    .LSEH_begin_${PREFIX}_cbc_encrypt
        .rva    .LSEH_end_${PREFIX}_cbc_encrypt
        .rva    .LSEH_info_cbc

        .rva    ${PREFIX}_set_decrypt_key
        .rva    .LSEH_end_set_decrypt_key
        .rva    .LSEH_info_key

        .rva    ${PREFIX}_set_encrypt_key
        .rva    .LSEH_end_set_encrypt_key
        .rva    .LSEH_info_key
.section        .xdata
.align  8
___
$code.=<<___ if ($PREFIX eq "aesni");
.LSEH_info_ecb:
        .byte   9,0,0,0
        .rva    ecb_ccm64_se_handler
        .rva    .Lecb_enc_body,.Lecb_enc_ret            # HandlerData[]
.LSEH_info_ccm64_enc:
        .byte   9,0,0,0
        .rva    ecb_ccm64_se_handler
        .rva    .Lccm64_enc_body,.Lccm64_enc_ret        # HandlerData[]
.LSEH_info_ccm64_dec:
        .byte   9,0,0,0
        .rva    ecb_ccm64_se_handler
        .rva    .Lccm64_dec_body,.Lccm64_dec_ret        # HandlerData[]
.LSEH_info_ctr32:
        .byte   9,0,0,0
        .rva    ctr_xts_se_handler
        .rva    .Lctr32_body,.Lctr32_epilogue           # HandlerData[]
.LSEH_info_xts_enc:
        .byte   9,0,0,0
        .rva    ctr_xts_se_handler
        .rva    .Lxts_enc_body,.Lxts_enc_epilogue       # HandlerData[]
.LSEH_info_xts_dec:
        .byte   9,0,0,0
        .rva    ctr_xts_se_handler
        .rva    .Lxts_dec_body,.Lxts_dec_epilogue       # HandlerData[]
.LSEH_info_ocb_enc:
        .byte   9,0,0,0
        .rva    ocb_se_handler
        .rva    .Locb_enc_body,.Locb_enc_epilogue       # HandlerData[]
        .rva    .Locb_enc_pop
        .long   0
.LSEH_info_ocb_dec:
        .byte   9,0,0,0
        .rva    ocb_se_handler
        .rva    .Locb_dec_body,.Locb_dec_epilogue       # HandlerData[]
        .rva    .Locb_dec_pop
        .long   0
___
$code.=<<___;
.LSEH_info_cbc:
        .byte   9,0,0,0
        .rva    cbc_se_handler
.LSEH_info_key:
        .byte   0x01,0x04,0x01,0x00
        .byte   0x04,0x02,0x00,0x00     # sub rsp,8
___
}

sub rex {
  local *opcode=shift;
  my ($dst,$src)=@_;
  my $rex=0;

    $rex|=0x04                  if($dst>=8);
    $rex|=0x01                  if($src>=8);
    push @opcode,$rex|0x40      if($rex);
}

sub aesni {
  my $line=shift;
  my @opcode=(0x66);

    if ($line=~/(aeskeygenassist)\s+\$([x0-9a-f]+),\s*%xmm([0-9]+),\s*%xmm([0-9]+)/) {
        rex(\@opcode,$4,$3);
        push @opcode,0x0f,0x3a,0xdf;
        push @opcode,0xc0|($3&7)|(($4&7)<<3);   # ModR/M
        my $c=$2;
        push @opcode,$c=~/^0/?oct($c):$c;
        return ".byte\t".join(',',@opcode);
    }
    elsif ($line=~/(aes[a-z]+)\s+%xmm([0-9]+),\s*%xmm([0-9]+)/) {
        my %opcodelet = (
                "aesimc" => 0xdb,
                "aesenc" => 0xdc,       "aesenclast" => 0xdd,
                "aesdec" => 0xde,       "aesdeclast" => 0xdf
        );
        return undef if (!defined($opcodelet{$1}));
        rex(\@opcode,$3,$2);
        push @opcode,0x0f,0x38,$opcodelet{$1};
        push @opcode,0xc0|($2&7)|(($3&7)<<3);   # ModR/M
        return ".byte\t".join(',',@opcode);
    }
    elsif ($line=~/(aes[a-z]+)\s+([0x1-9a-fA-F]*)\(%rsp\),\s*%xmm([0-9]+)/) {
        my %opcodelet = (
                "aesenc" => 0xdc,       "aesenclast" => 0xdd,
                "aesdec" => 0xde,       "aesdeclast" => 0xdf
        );
        return undef if (!defined($opcodelet{$1}));
        my $off = $2;
        push @opcode,0x44 if ($3>=8);
        push @opcode,0x0f,0x38,$opcodelet{$1};
        push @opcode,0x44|(($3&7)<<3),0x24;     # ModR/M
        push @opcode,($off=~/^0/?oct($off):$off)&0xff;
        return ".byte\t".join(',',@opcode);
    }
    return $line;
}

sub movbe {
        ".byte  0x0f,0x38,0xf1,0x44,0x24,".shift;
}

$code =~ s/\`([^\`]*)\`/eval($1)/gem;
$code =~ s/\b(aes.*%xmm[0-9]+).*$/aesni($1)/gem;
#$code =~ s/\bmovbe\s+%eax/bswap %eax; mov %eax/gm;     # debugging artefact
$code =~ s/\bmovbe\s+%eax,\s*([0-9]+)\(%rsp\)/movbe($1)/gem;

print $code;

close STDOUT or die "error closing STDOUT: $!";