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#!/usr/bin/env perl
# ====================================================================
# Written by Andy Polyakov <appro@fy.chalmers.se> 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-586.pl [see below for
# details].
#
# Performance.
#
# To start with see corresponding paragraph in aesni-x86_64.pl...
# Instead of filling table similar to one found there I've chosen to
# summarize *comparison* results for raw ECB, CTR and CBC benchmarks.
# The simplified table below represents 32-bit performance relative
# to 64-bit one in every given point. Ratios vary for different
# encryption modes, therefore interval values.
#
# 16-byte 64-byte 256-byte 1-KB 8-KB
# 53-67% 67-84% 91-94% 95-98% 97-99.5%
#
# Lower ratios for smaller block sizes are perfectly understandable,
# because function call overhead is higher in 32-bit mode. Largest
# 8-KB block performance is virtually same: 32-bit code is less than
# 1% slower for ECB, CBC and CCM, and ~3% slower otherwise.
# January 2011
#
# See aesni-x86_64.pl for details. Unlike x86_64 version this module
# interleaves at most 6 aes[enc|dec] instructions, because there are
# not enough registers for 8x interleave [which should be optimal for
# Sandy Bridge]. Actually, performance results for 6x interleave
# factor presented in aesni-x86_64.pl (except for CTR) are for this
# module.
# April 2011
#
# Add aesni_xts_[en|de]crypt. Westmere spends 1.50 cycles processing
# one byte out of 8KB with 128-bit key, Sandy Bridge - 1.09.
$PREFIX="aesni"; # if $PREFIX is set to "AES", the script
# generates drop-in replacement for
# crypto/aes/asm/aes-586.pl:-)
$inline=1; # inline _aesni_[en|de]crypt
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
&asm_init($ARGV[0],$0);
if ($PREFIX eq "aesni") { $movekey=*movups; }
else { $movekey=*movups; }
$len="eax";
$rounds="ecx";
$key="edx";
$inp="esi";
$out="edi";
$rounds_="ebx"; # backup copy for $rounds
$key_="ebp"; # backup copy for $key
$rndkey0="xmm0";
$rndkey1="xmm1";
$inout0="xmm2";
$inout1="xmm3";
$inout2="xmm4";
$inout3="xmm5"; $in1="xmm5";
$inout4="xmm6"; $in0="xmm6";
$inout5="xmm7"; $ivec="xmm7";
# AESNI extenstion
sub aeskeygenassist
{ my($dst,$src,$imm)=@_;
if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
{ &data_byte(0x66,0x0f,0x3a,0xdf,0xc0|($1<<3)|$2,$imm); }
}
sub aescommon
{ my($opcodelet,$dst,$src)=@_;
if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
{ &data_byte(0x66,0x0f,0x38,$opcodelet,0xc0|($1<<3)|$2);}
}
sub aesimc { aescommon(0xdb,@_); }
sub aesenc { aescommon(0xdc,@_); }
sub aesenclast { aescommon(0xdd,@_); }
sub aesdec { aescommon(0xde,@_); }
sub aesdeclast { aescommon(0xdf,@_); }
# Inline version of internal aesni_[en|de]crypt1
{ my $sn;
sub aesni_inline_generate1
{ my ($p,$inout,$ivec)=@_; $inout=$inout0 if (!defined($inout));
$sn++;
&$movekey ($rndkey0,&QWP(0,$key));
&$movekey ($rndkey1,&QWP(16,$key));
&xorps ($ivec,$rndkey0) if (defined($ivec));
&lea ($key,&DWP(32,$key));
&xorps ($inout,$ivec) if (defined($ivec));
&xorps ($inout,$rndkey0) if (!defined($ivec));
&set_label("${p}1_loop_$sn");
eval"&aes${p} ($inout,$rndkey1)";
&dec ($rounds);
&$movekey ($rndkey1,&QWP(0,$key));
&lea ($key,&DWP(16,$key));
&jnz (&label("${p}1_loop_$sn"));
eval"&aes${p}last ($inout,$rndkey1)";
}}
sub aesni_generate1 # fully unrolled loop
{ my ($p,$inout)=@_; $inout=$inout0 if (!defined($inout));
&function_begin_B("_aesni_${p}rypt1");
&movups ($rndkey0,&QWP(0,$key));
&$movekey ($rndkey1,&QWP(0x10,$key));
&xorps ($inout,$rndkey0);
&$movekey ($rndkey0,&QWP(0x20,$key));
&lea ($key,&DWP(0x30,$key));
&cmp ($rounds,11);
&jb (&label("${p}128"));
&lea ($key,&DWP(0x20,$key));
&je (&label("${p}192"));
&lea ($key,&DWP(0x20,$key));
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(-0x40,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(-0x30,$key));
&set_label("${p}192");
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(-0x20,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(-0x10,$key));
&set_label("${p}128");
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(0,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(0x10,$key));
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(0x20,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(0x30,$key));
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(0x40,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(0x50,$key));
eval"&aes${p} ($inout,$rndkey1)";
&$movekey ($rndkey1,&QWP(0x60,$key));
eval"&aes${p} ($inout,$rndkey0)";
&$movekey ($rndkey0,&QWP(0x70,$key));
eval"&aes${p} ($inout,$rndkey1)";
eval"&aes${p}last ($inout,$rndkey0)";
&ret();
&function_end_B("_aesni_${p}rypt1");
}
# void $PREFIX_encrypt (const void *inp,void *out,const AES_KEY *key);
&aesni_generate1("enc") if (!$inline);
&function_begin_B("${PREFIX}_encrypt");
&mov ("eax",&wparam(0));
&mov ($key,&wparam(2));
&movups ($inout0,&QWP(0,"eax"));
&mov ($rounds,&DWP(240,$key));
&mov ("eax",&wparam(1));
if ($inline)
{ &aesni_inline_generate1("enc"); }
else
{ &call ("_aesni_encrypt1"); }
&movups (&QWP(0,"eax"),$inout0);
&ret ();
&function_end_B("${PREFIX}_encrypt");
# void $PREFIX_decrypt (const void *inp,void *out,const AES_KEY *key);
&aesni_generate1("dec") if(!$inline);
&function_begin_B("${PREFIX}_decrypt");
&mov ("eax",&wparam(0));
&mov ($key,&wparam(2));
&movups ($inout0,&QWP(0,"eax"));
&mov ($rounds,&DWP(240,$key));
&mov ("eax",&wparam(1));
if ($inline)
{ &aesni_inline_generate1("dec"); }
else
{ &call ("_aesni_decrypt1"); }
&movups (&QWP(0,"eax"),$inout0);
&ret ();
&function_end_B("${PREFIX}_decrypt");
# _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 makes no sense to implement 2x subroutine.
# aes[enc|dec] latency in next processor generation is 8, but the
# instructions can be scheduled every cycle. Optimal interleave for
# new processor is therefore 8x, but it's unfeasible to accommodate it
# in XMM registers addreassable in 32-bit mode and therefore 6x is
# used instead...
sub aesni_generate3
{ my $p=shift;
&function_begin_B("_aesni_${p}rypt3");
&$movekey ($rndkey0,&QWP(0,$key));
&shr ($rounds,1);
&$movekey ($rndkey1,&QWP(16,$key));
&lea ($key,&DWP(32,$key));
&xorps ($inout0,$rndkey0);
&pxor ($inout1,$rndkey0);
&pxor ($inout2,$rndkey0);
&$movekey ($rndkey0,&QWP(0,$key));
&set_label("${p}3_loop");
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
&dec ($rounds);
eval"&aes${p} ($inout2,$rndkey1)";
&$movekey ($rndkey1,&QWP(16,$key));
eval"&aes${p} ($inout0,$rndkey0)";
eval"&aes${p} ($inout1,$rndkey0)";
&lea ($key,&DWP(32,$key));
eval"&aes${p} ($inout2,$rndkey0)";
&$movekey ($rndkey0,&QWP(0,$key));
&jnz (&label("${p}3_loop"));
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
eval"&aes${p} ($inout2,$rndkey1)";
eval"&aes${p}last ($inout0,$rndkey0)";
eval"&aes${p}last ($inout1,$rndkey0)";
eval"&aes${p}last ($inout2,$rndkey0)";
&ret();
&function_end_B("_aesni_${p}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 $p=shift;
&function_begin_B("_aesni_${p}rypt4");
&$movekey ($rndkey0,&QWP(0,$key));
&$movekey ($rndkey1,&QWP(16,$key));
&shr ($rounds,1);
&lea ($key,&DWP(32,$key));
&xorps ($inout0,$rndkey0);
&pxor ($inout1,$rndkey0);
&pxor ($inout2,$rndkey0);
&pxor ($inout3,$rndkey0);
&$movekey ($rndkey0,&QWP(0,$key));
&set_label("${p}4_loop");
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
&dec ($rounds);
eval"&aes${p} ($inout2,$rndkey1)";
eval"&aes${p} ($inout3,$rndkey1)";
&$movekey ($rndkey1,&QWP(16,$key));
eval"&aes${p} ($inout0,$rndkey0)";
eval"&aes${p} ($inout1,$rndkey0)";
&lea ($key,&DWP(32,$key));
eval"&aes${p} ($inout2,$rndkey0)";
eval"&aes${p} ($inout3,$rndkey0)";
&$movekey ($rndkey0,&QWP(0,$key));
&jnz (&label("${p}4_loop"));
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
eval"&aes${p} ($inout2,$rndkey1)";
eval"&aes${p} ($inout3,$rndkey1)";
eval"&aes${p}last ($inout0,$rndkey0)";
eval"&aes${p}last ($inout1,$rndkey0)";
eval"&aes${p}last ($inout2,$rndkey0)";
eval"&aes${p}last ($inout3,$rndkey0)";
&ret();
&function_end_B("_aesni_${p}rypt4");
}
sub aesni_generate6
{ my $p=shift;
&function_begin_B("_aesni_${p}rypt6");
&static_label("_aesni_${p}rypt6_enter");
&$movekey ($rndkey0,&QWP(0,$key));
&shr ($rounds,1);
&$movekey ($rndkey1,&QWP(16,$key));
&lea ($key,&DWP(32,$key));
&xorps ($inout0,$rndkey0);
&pxor ($inout1,$rndkey0); # pxor does better here
eval"&aes${p} ($inout0,$rndkey1)";
&pxor ($inout2,$rndkey0);
eval"&aes${p} ($inout1,$rndkey1)";
&pxor ($inout3,$rndkey0);
&dec ($rounds);
eval"&aes${p} ($inout2,$rndkey1)";
&pxor ($inout4,$rndkey0);
eval"&aes${p} ($inout3,$rndkey1)";
&pxor ($inout5,$rndkey0);
eval"&aes${p} ($inout4,$rndkey1)";
&$movekey ($rndkey0,&QWP(0,$key));
eval"&aes${p} ($inout5,$rndkey1)";
&jmp (&label("_aesni_${p}rypt6_enter"));
&set_label("${p}6_loop",16);
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
&dec ($rounds);
eval"&aes${p} ($inout2,$rndkey1)";
eval"&aes${p} ($inout3,$rndkey1)";
eval"&aes${p} ($inout4,$rndkey1)";
eval"&aes${p} ($inout5,$rndkey1)";
&set_label("_aesni_${p}rypt6_enter",16);
&$movekey ($rndkey1,&QWP(16,$key));
eval"&aes${p} ($inout0,$rndkey0)";
eval"&aes${p} ($inout1,$rndkey0)";
&lea ($key,&DWP(32,$key));
eval"&aes${p} ($inout2,$rndkey0)";
eval"&aes${p} ($inout3,$rndkey0)";
eval"&aes${p} ($inout4,$rndkey0)";
eval"&aes${p} ($inout5,$rndkey0)";
&$movekey ($rndkey0,&QWP(0,$key));
&jnz (&label("${p}6_loop"));
eval"&aes${p} ($inout0,$rndkey1)";
eval"&aes${p} ($inout1,$rndkey1)";
eval"&aes${p} ($inout2,$rndkey1)";
eval"&aes${p} ($inout3,$rndkey1)";
eval"&aes${p} ($inout4,$rndkey1)";
eval"&aes${p} ($inout5,$rndkey1)";
eval"&aes${p}last ($inout0,$rndkey0)";
eval"&aes${p}last ($inout1,$rndkey0)";
eval"&aes${p}last ($inout2,$rndkey0)";
eval"&aes${p}last ($inout3,$rndkey0)";
eval"&aes${p}last ($inout4,$rndkey0)";
eval"&aes${p}last ($inout5,$rndkey0)";
&ret();
&function_end_B("_aesni_${p}rypt6");
}
&aesni_generate3("enc") if ($PREFIX eq "aesni");
&aesni_generate3("dec");
&aesni_generate4("enc") if ($PREFIX eq "aesni");
&aesni_generate4("dec");
&aesni_generate6("enc") if ($PREFIX eq "aesni");
&aesni_generate6("dec");
if ($PREFIX eq "aesni") {
######################################################################
# void aesni_ecb_encrypt (const void *in, void *out,
# size_t length, const AES_KEY *key,
# int enc);
&function_begin("aesni_ecb_encrypt");
&mov ($inp,&wparam(0));
&mov ($out,&wparam(1));
&mov ($len,&wparam(2));
&mov ($key,&wparam(3));
&mov ($rounds_,&wparam(4));
&and ($len,-16);
&jz (&label("ecb_ret"));
&mov ($rounds,&DWP(240,$key));
&test ($rounds_,$rounds_);
&jz (&label("ecb_decrypt"));
&mov ($key_,$key); # backup $key
&mov ($rounds_,$rounds); # backup $rounds
&cmp ($len,0x60);
&jb (&label("ecb_enc_tail"));
&movdqu ($inout0,&QWP(0,$inp));
&movdqu ($inout1,&QWP(0x10,$inp));
&movdqu ($inout2,&QWP(0x20,$inp));
&movdqu ($inout3,&QWP(0x30,$inp));
&movdqu ($inout4,&QWP(0x40,$inp));
&movdqu ($inout5,&QWP(0x50,$inp));
&lea ($inp,&DWP(0x60,$inp));
&sub ($len,0x60);
&jmp (&label("ecb_enc_loop6_enter"));
&set_label("ecb_enc_loop6",16);
&movups (&QWP(0,$out),$inout0);
&movdqu ($inout0,&QWP(0,$inp));
&movups (&QWP(0x10,$out),$inout1);
&movdqu ($inout1,&QWP(0x10,$inp));
&movups (&QWP(0x20,$out),$inout2);
&movdqu ($inout2,&QWP(0x20,$inp));
&movups (&QWP(0x30,$out),$inout3);
&movdqu ($inout3,&QWP(0x30,$inp));
&movups (&QWP(0x40,$out),$inout4);
&movdqu ($inout4,&QWP(0x40,$inp));
&movups (&QWP(0x50,$out),$inout5);
&lea ($out,&DWP(0x60,$out));
&movdqu ($inout5,&QWP(0x50,$inp));
&lea ($inp,&DWP(0x60,$inp));
&set_label("ecb_enc_loop6_enter");
&call ("_aesni_encrypt6");
&mov ($key,$key_); # restore $key
&mov ($rounds,$rounds_); # restore $rounds
&sub ($len,0x60);
&jnc (&label("ecb_enc_loop6"));
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&movups (&QWP(0x40,$out),$inout4);
&movups (&QWP(0x50,$out),$inout5);
&lea ($out,&DWP(0x60,$out));
&add ($len,0x60);
&jz (&label("ecb_ret"));
&set_label("ecb_enc_tail");
&movups ($inout0,&QWP(0,$inp));
&cmp ($len,0x20);
&jb (&label("ecb_enc_one"));
&movups ($inout1,&QWP(0x10,$inp));
&je (&label("ecb_enc_two"));
&movups ($inout2,&QWP(0x20,$inp));
&cmp ($len,0x40);
&jb (&label("ecb_enc_three"));
&movups ($inout3,&QWP(0x30,$inp));
&je (&label("ecb_enc_four"));
&movups ($inout4,&QWP(0x40,$inp));
&xorps ($inout5,$inout5);
&call ("_aesni_encrypt6");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&movups (&QWP(0x40,$out),$inout4);
jmp (&label("ecb_ret"));
&set_label("ecb_enc_one",16);
if ($inline)
{ &aesni_inline_generate1("enc"); }
else
{ &call ("_aesni_encrypt1"); }
&movups (&QWP(0,$out),$inout0);
&jmp (&label("ecb_ret"));
&set_label("ecb_enc_two",16);
&xorps ($inout2,$inout2);
&call ("_aesni_encrypt3");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&jmp (&label("ecb_ret"));
&set_label("ecb_enc_three",16);
&call ("_aesni_encrypt3");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&jmp (&label("ecb_ret"));
&set_label("ecb_enc_four",16);
&call ("_aesni_encrypt4");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&jmp (&label("ecb_ret"));
######################################################################
&set_label("ecb_decrypt",16);
&mov ($key_,$key); # backup $key
&mov ($rounds_,$rounds); # backup $rounds
&cmp ($len,0x60);
&jb (&label("ecb_dec_tail"));
&movdqu ($inout0,&QWP(0,$inp));
&movdqu ($inout1,&QWP(0x10,$inp));
&movdqu ($inout2,&QWP(0x20,$inp));
&movdqu ($inout3,&QWP(0x30,$inp));
&movdqu ($inout4,&QWP(0x40,$inp));
&movdqu ($inout5,&QWP(0x50,$inp));
&lea ($inp,&DWP(0x60,$inp));
&sub ($len,0x60);
&jmp (&label("ecb_dec_loop6_enter"));
&set_label("ecb_dec_loop6",16);
&movups (&QWP(0,$out),$inout0);
&movdqu ($inout0,&QWP(0,$inp));
&movups (&QWP(0x10,$out),$inout1);
&movdqu ($inout1,&QWP(0x10,$inp));
&movups (&QWP(0x20,$out),$inout2);
&movdqu ($inout2,&QWP(0x20,$inp));
&movups (&QWP(0x30,$out),$inout3);
&movdqu ($inout3,&QWP(0x30,$inp));
&movups (&QWP(0x40,$out),$inout4);
&movdqu ($inout4,&QWP(0x40,$inp));
&movups (&QWP(0x50,$out),$inout5);
&lea ($out,&DWP(0x60,$out));
&movdqu ($inout5,&QWP(0x50,$inp));
&lea ($inp,&DWP(0x60,$inp));
&set_label("ecb_dec_loop6_enter");
&call ("_aesni_decrypt6");
&mov ($key,$key_); # restore $key
&mov ($rounds,$rounds_); # restore $rounds
&sub ($len,0x60);
&jnc (&label("ecb_dec_loop6"));
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&movups (&QWP(0x40,$out),$inout4);
&movups (&QWP(0x50,$out),$inout5);
&lea ($out,&DWP(0x60,$out));
&add ($len,0x60);
&jz (&label("ecb_ret"));
&set_label("ecb_dec_tail");
&movups ($inout0,&QWP(0,$inp));
&cmp ($len,0x20);
&jb (&label("ecb_dec_one"));
&movups ($inout1,&QWP(0x10,$inp));
&je (&label("ecb_dec_two"));
&movups ($inout2,&QWP(0x20,$inp));
&cmp ($len,0x40);
&jb (&label("ecb_dec_three"));
&movups ($inout3,&QWP(0x30,$inp));
&je (&label("ecb_dec_four"));
&movups ($inout4,&QWP(0x40,$inp));
&xorps ($inout5,$inout5);
&call ("_aesni_decrypt6");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&movups (&QWP(0x40,$out),$inout4);
&jmp (&label("ecb_ret"));
&set_label("ecb_dec_one",16);
if ($inline)
{ &aesni_inline_generate1("dec"); }
else
{ &call ("_aesni_decrypt1"); }
&movups (&QWP(0,$out),$inout0);
&jmp (&label("ecb_ret"));
&set_label("ecb_dec_two",16);
&xorps ($inout2,$inout2);
&call ("_aesni_decrypt3");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&jmp (&label("ecb_ret"));
&set_label("ecb_dec_three",16);
&call ("_aesni_decrypt3");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&jmp (&label("ecb_ret"));
&set_label("ecb_dec_four",16);
&call ("_aesni_decrypt4");
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&set_label("ecb_ret");
&function_end("aesni_ecb_encrypt");
######################################################################
# 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 $cmac=$inout1;
&function_begin("aesni_ccm64_encrypt_blocks");
&mov ($inp,&wparam(0));
&mov ($out,&wparam(1));
&mov ($len,&wparam(2));
&mov ($key,&wparam(3));
&mov ($rounds_,&wparam(4));
&mov ($rounds,&wparam(5));
&mov ($key_,"esp");
&sub ("esp",60);
&and ("esp",-16); # align stack
&mov (&DWP(48,"esp"),$key_);
&movdqu ($ivec,&QWP(0,$rounds_)); # load ivec
&movdqu ($cmac,&QWP(0,$rounds)); # load cmac
&mov ($rounds,&DWP(240,$key));
# compose byte-swap control mask for pshufb on stack
&mov (&DWP(0,"esp"),0x0c0d0e0f);
&mov (&DWP(4,"esp"),0x08090a0b);
&mov (&DWP(8,"esp"),0x04050607);
&mov (&DWP(12,"esp"),0x00010203);
# compose counter increment vector on stack
&mov ($rounds_,1);
&xor ($key_,$key_);
&mov (&DWP(16,"esp"),$rounds_);
&mov (&DWP(20,"esp"),$key_);
&mov (&DWP(24,"esp"),$key_);
&mov (&DWP(28,"esp"),$key_);
&shr ($rounds,1);
&lea ($key_,&DWP(0,$key));
&movdqa ($inout3,&QWP(0,"esp"));
&movdqa ($inout0,$ivec);
&mov ($rounds_,$rounds);
&pshufb ($ivec,$inout3);
&set_label("ccm64_enc_outer");
&$movekey ($rndkey0,&QWP(0,$key_));
&mov ($rounds,$rounds_);
&movups ($in0,&QWP(0,$inp));
&xorps ($inout0,$rndkey0);
&$movekey ($rndkey1,&QWP(16,$key_));
&xorps ($rndkey0,$in0);
&lea ($key,&DWP(32,$key_));
&xorps ($cmac,$rndkey0); # cmac^=inp
&$movekey ($rndkey0,&QWP(0,$key));
&set_label("ccm64_enc2_loop");
&aesenc ($inout0,$rndkey1);
&dec ($rounds);
&aesenc ($cmac,$rndkey1);
&$movekey ($rndkey1,&QWP(16,$key));
&aesenc ($inout0,$rndkey0);
&lea ($key,&DWP(32,$key));
&aesenc ($cmac,$rndkey0);
&$movekey ($rndkey0,&QWP(0,$key));
&jnz (&label("ccm64_enc2_loop"));
&aesenc ($inout0,$rndkey1);
&aesenc ($cmac,$rndkey1);
&paddq ($ivec,&QWP(16,"esp"));
&aesenclast ($inout0,$rndkey0);
&aesenclast ($cmac,$rndkey0);
&dec ($len);
&lea ($inp,&DWP(16,$inp));
&xorps ($in0,$inout0); # inp^=E(ivec)
&movdqa ($inout0,$ivec);
&movups (&QWP(0,$out),$in0); # save output
&lea ($out,&DWP(16,$out));
&pshufb ($inout0,$inout3);
&jnz (&label("ccm64_enc_outer"));
&mov ("esp",&DWP(48,"esp"));
&mov ($out,&wparam(5));
&movups (&QWP(0,$out),$cmac);
&function_end("aesni_ccm64_encrypt_blocks");
&function_begin("aesni_ccm64_decrypt_blocks");
&mov ($inp,&wparam(0));
&mov ($out,&wparam(1));
&mov ($len,&wparam(2));
&mov ($key,&wparam(3));
&mov ($rounds_,&wparam(4));
&mov ($rounds,&wparam(5));
&mov ($key_,"esp");
&sub ("esp",60);
&and ("esp",-16); # align stack
&mov (&DWP(48,"esp"),$key_);
&movdqu ($ivec,&QWP(0,$rounds_)); # load ivec
&movdqu ($cmac,&QWP(0,$rounds)); # load cmac
&mov ($rounds,&DWP(240,$key));
# compose byte-swap control mask for pshufb on stack
&mov (&DWP(0,"esp"),0x0c0d0e0f);
&mov (&DWP(4,"esp"),0x08090a0b);
&mov (&DWP(8,"esp"),0x04050607);
&mov (&DWP(12,"esp"),0x00010203);
# compose counter increment vector on stack
&mov ($rounds_,1);
&xor ($key_,$key_);
&mov (&DWP(16,"esp"),$rounds_);
&mov (&DWP(20,"esp"),$key_);
&mov (&DWP(24,"esp"),$key_);
&mov (&DWP(28,"esp"),$key_);
&movdqa ($inout3,&QWP(0,"esp")); # bswap mask
&movdqa ($inout0,$ivec);
&mov ($key_,$key);
&mov ($rounds_,$rounds);
&pshufb ($ivec,$inout3);
if ($inline)
{ &aesni_inline_generate1("enc"); }
else
{ &call ("_aesni_encrypt1"); }
&movups ($in0,&QWP(0,$inp)); # load inp
&paddq ($ivec,&QWP(16,"esp"));
&lea ($inp,&QWP(16,$inp));
&jmp (&label("ccm64_dec_outer"));
&set_label("ccm64_dec_outer",16);
&xorps ($in0,$inout0); # inp ^= E(ivec)
&movdqa ($inout0,$ivec);
&mov ($rounds,$rounds_);
&movups (&QWP(0,$out),$in0); # save output
&lea ($out,&DWP(16,$out));
&pshufb ($inout0,$inout3);
&sub ($len,1);
&jz (&label("ccm64_dec_break"));
&$movekey ($rndkey0,&QWP(0,$key_));
&shr ($rounds,1);
&$movekey ($rndkey1,&QWP(16,$key_));
&xorps ($in0,$rndkey0);
&lea ($key,&DWP(32,$key_));
&xorps ($inout0,$rndkey0);
&xorps ($cmac,$in0); # cmac^=out
&$movekey ($rndkey0,&QWP(0,$key));
&set_label("ccm64_dec2_loop");
&aesenc ($inout0,$rndkey1);
&dec ($rounds);
&aesenc ($cmac,$rndkey1);
&$movekey ($rndkey1,&QWP(16,$key));
&aesenc ($inout0,$rndkey0);
&lea ($key,&DWP(32,$key));
&aesenc ($cmac,$rndkey0);
&$movekey ($rndkey0,&QWP(0,$key));
&jnz (&label("ccm64_dec2_loop"));
&movups ($in0,&QWP(0,$inp)); # load inp
&paddq ($ivec,&QWP(16,"esp"));
&aesenc ($inout0,$rndkey1);
&aesenc ($cmac,$rndkey1);
&lea ($inp,&QWP(16,$inp));
&aesenclast ($inout0,$rndkey0);
&aesenclast ($cmac,$rndkey0);
&jmp (&label("ccm64_dec_outer"));
&set_label("ccm64_dec_break",16);
&mov ($key,$key_);
if ($inline)
{ &aesni_inline_generate1("enc",$cmac,$in0); }
else
{ &call ("_aesni_encrypt1",$cmac); }
&mov ("esp",&DWP(48,"esp"));
&mov ($out,&wparam(5));
&movups (&QWP(0,$out),$cmac);
&function_end("aesni_ccm64_decrypt_blocks");
}
######################################################################
# 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 engine/eng_aesni.c for details)
#
# stack layout:
# 0 pshufb mask
# 16 vector addend: 0,6,6,6
# 32 counter-less ivec
# 48 1st triplet of counter vector
# 64 2nd triplet of counter vector
# 80 saved %esp
&function_begin("aesni_ctr32_encrypt_blocks");
&mov ($inp,&wparam(0));
&mov ($out,&wparam(1));
&mov ($len,&wparam(2));
&mov ($key,&wparam(3));
&mov ($rounds_,&wparam(4));
&mov ($key_,"esp");
&sub ("esp",88);
&and ("esp",-16); # align stack
&mov (&DWP(80,"esp"),$key_);
&cmp ($len,1);
&je (&label("ctr32_one_shortcut"));
&movdqu ($inout5,&QWP(0,$rounds_)); # load ivec
# compose byte-swap control mask for pshufb on stack
&mov (&DWP(0,"esp"),0x0c0d0e0f);
&mov (&DWP(4,"esp"),0x08090a0b);
&mov (&DWP(8,"esp"),0x04050607);
&mov (&DWP(12,"esp"),0x00010203);
# compose counter increment vector on stack
&mov ($rounds,6);
&xor ($key_,$key_);
&mov (&DWP(16,"esp"),$rounds);
&mov (&DWP(20,"esp"),$rounds);
&mov (&DWP(24,"esp"),$rounds);
&mov (&DWP(28,"esp"),$key_);
&pextrd ($rounds_,$inout5,3); # pull 32-bit counter
&pinsrd ($inout5,$key_,3); # wipe 32-bit counter
&mov ($rounds,&DWP(240,$key)); # key->rounds
# compose 2 vectors of 3x32-bit counters
&bswap ($rounds_);
&pxor ($rndkey1,$rndkey1);
&pxor ($rndkey0,$rndkey0);
&movdqa ($inout0,&QWP(0,"esp")); # load byte-swap mask
&pinsrd ($rndkey1,$rounds_,0);
&lea ($key_,&DWP(3,$rounds_));
&pinsrd ($rndkey0,$key_,0);
&inc ($rounds_);
&pinsrd ($rndkey1,$rounds_,1);
&inc ($key_);
&pinsrd ($rndkey0,$key_,1);
&inc ($rounds_);
&pinsrd ($rndkey1,$rounds_,2);
&inc ($key_);
&pinsrd ($rndkey0,$key_,2);
&movdqa (&QWP(48,"esp"),$rndkey1); # save 1st triplet
&pshufb ($rndkey1,$inout0); # byte swap
&movdqa (&QWP(64,"esp"),$rndkey0); # save 2nd triplet
&pshufb ($rndkey0,$inout0); # byte swap
&pshufd ($inout0,$rndkey1,3<<6); # place counter to upper dword
&pshufd ($inout1,$rndkey1,2<<6);
&cmp ($len,6);
&jb (&label("ctr32_tail"));
&movdqa (&QWP(32,"esp"),$inout5); # save counter-less ivec
&shr ($rounds,1);
&mov ($key_,$key); # backup $key
&mov ($rounds_,$rounds); # backup $rounds
&sub ($len,6);
&jmp (&label("ctr32_loop6"));
&set_label("ctr32_loop6",16);
&pshufd ($inout2,$rndkey1,1<<6);
&movdqa ($rndkey1,&QWP(32,"esp")); # pull counter-less ivec
&pshufd ($inout3,$rndkey0,3<<6);
&por ($inout0,$rndkey1); # merge counter-less ivec
&pshufd ($inout4,$rndkey0,2<<6);
&por ($inout1,$rndkey1);
&pshufd ($inout5,$rndkey0,1<<6);
&por ($inout2,$rndkey1);
&por ($inout3,$rndkey1);
&por ($inout4,$rndkey1);
&por ($inout5,$rndkey1);
# inlining _aesni_encrypt6's prologue gives ~4% improvement...
&$movekey ($rndkey0,&QWP(0,$key_));
&$movekey ($rndkey1,&QWP(16,$key_));
&lea ($key,&DWP(32,$key_));
&dec ($rounds);
&pxor ($inout0,$rndkey0);
&pxor ($inout1,$rndkey0);
&aesenc ($inout0,$rndkey1);
&pxor ($inout2,$rndkey0);
&aesenc ($inout1,$rndkey1);
&pxor ($inout3,$rndkey0);
&aesenc ($inout2,$rndkey1);
&pxor ($inout4,$rndkey0);
&aesenc ($inout3,$rndkey1);
&pxor ($inout5,$rndkey0);
&aesenc ($inout4,$rndkey1);
&$movekey ($rndkey0,&QWP(0,$key));
&aesenc ($inout5,$rndkey1);
&call (&label("_aesni_encrypt6_enter"));
&movups ($rndkey1,&QWP(0,$inp));
&movups ($rndkey0,&QWP(0x10,$inp));
&xorps ($inout0,$rndkey1);
&movups ($rndkey1,&QWP(0x20,$inp));
&xorps ($inout1,$rndkey0);
&movups (&QWP(0,$out),$inout0);
&movdqa ($rndkey0,&QWP(16,"esp")); # load increment
&xorps ($inout2,$rndkey1);
&movdqa ($rndkey1,&QWP(48,"esp")); # load 1st triplet
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&paddd ($rndkey1,$rndkey0); # 1st triplet increment
&paddd ($rndkey0,&QWP(64,"esp")); # 2nd triplet increment
&movdqa ($inout0,&QWP(0,"esp")); # load byte swap mask
&movups ($inout1,&QWP(0x30,$inp));
&movups ($inout2,&QWP(0x40,$inp));
&xorps ($inout3,$inout1);
&movups ($inout1,&QWP(0x50,$inp));
&lea ($inp,&DWP(0x60,$inp));
&movdqa (&QWP(48,"esp"),$rndkey1); # save 1st triplet
&pshufb ($rndkey1,$inout0); # byte swap
&xorps ($inout4,$inout2);
&movups (&QWP(0x30,$out),$inout3);
&xorps ($inout5,$inout1);
&movdqa (&QWP(64,"esp"),$rndkey0); # save 2nd triplet
&pshufb ($rndkey0,$inout0); # byte swap
&movups (&QWP(0x40,$out),$inout4);
&pshufd ($inout0,$rndkey1,3<<6);
&movups (&QWP(0x50,$out),$inout5);
&lea ($out,&DWP(0x60,$out));
&mov ($rounds,$rounds_);
&pshufd ($inout1,$rndkey1,2<<6);
&sub ($len,6);
&jnc (&label("ctr32_loop6"));
&add ($len,6);
&jz (&label("ctr32_ret"));
&mov ($key,$key_);
&lea ($rounds,&DWP(1,"",$rounds,2)); # restore $rounds
&movdqa ($inout5,&QWP(32,"esp")); # pull count-less ivec
&set_label("ctr32_tail");
&por ($inout0,$inout5);
&cmp ($len,2);
&jb (&label("ctr32_one"));
&pshufd ($inout2,$rndkey1,1<<6);
&por ($inout1,$inout5);
&je (&label("ctr32_two"));
&pshufd ($inout3,$rndkey0,3<<6);
&por ($inout2,$inout5);
&cmp ($len,4);
&jb (&label("ctr32_three"));
&pshufd ($inout4,$rndkey0,2<<6);
&por ($inout3,$inout5);
&je (&label("ctr32_four"));
&por ($inout4,$inout5);
&call ("_aesni_encrypt6");
&movups ($rndkey1,&QWP(0,$inp));
&movups ($rndkey0,&QWP(0x10,$inp));
&xorps ($inout0,$rndkey1);
&movups ($rndkey1,&QWP(0x20,$inp));
&xorps ($inout1,$rndkey0);
&movups ($rndkey0,&QWP(0x30,$inp));
&xorps ($inout2,$rndkey1);
&movups ($rndkey1,&QWP(0x40,$inp));
&xorps ($inout3,$rndkey0);
&movups (&QWP(0,$out),$inout0);
&xorps ($inout4,$rndkey1);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&movups (&QWP(0x30,$out),$inout3);
&movups (&QWP(0x40,$out),$inout4);
&jmp (&label("ctr32_ret"));
&set_label("ctr32_one_shortcut",16);
&movups ($inout0,&QWP(0,$rounds_)); # load ivec
&mov ($rounds,&DWP(240,$key));
&set_label("ctr32_one");
if ($inline)
{ &aesni_inline_generate1("enc"); }
else
{ &call ("_aesni_encrypt1"); }
&movups ($in0,&QWP(0,$inp));
&xorps ($in0,$inout0);
&movups (&QWP(0,$out),$in0);
&jmp (&label("ctr32_ret"));
&set_label("ctr32_two",16);
&call ("_aesni_encrypt3");
&movups ($inout3,&QWP(0,$inp));
&movups ($inout4,&QWP(0x10,$inp));
&xorps ($inout0,$inout3);
&xorps ($inout1,$inout4);
&movups (&QWP(0,$out),$inout0);
&movups (&QWP(0x10,$out),$inout1);
&jmp (&label("ctr32_ret"));
&set_label("ctr32_three",16);
&call ("_aesni_encrypt3");
&movups ($inout3,&QWP(0,$inp));
&movups ($inout4,&QWP(0x10,$inp));
&xorps ($inout0,$inout3);
&movups ($inout5,&QWP(0x20,$inp));
&xorps ($inout1,$inout4);
&movups (&QWP(0,$out),$inout0);
&xorps ($inout2,$inout5);
&movups (&QWP(0x10,$out),$inout1);
&movups (&QWP(0x20,$out),$inout2);
&jmp (&label("ctr32_ret"));
&set_label("ctr32_four",16);
&call ("_aesni_encrypt4");
&movups ($inout4,&QWP(0,$inp));
&movups ($inout5,&QWP(0x10,$inp));
&movups ($rndkey1,&QWP(0x20,$inp));
&xorps ($inout0,$inout4);