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openssl/crypto/des/asm/des-586.pl
Richard Levitte 1aa89a7a3a Unify all assembler file generators 
They now generally conform to the following argument sequence:

    script.pl "$(PERLASM_SCHEME)" [ C preprocessor arguments ... ] \
              $(PROCESSOR) <output file>

However, in the spirit of being able to use these scripts manually,
they also allow for no argument, or for only the flavour, or for only
the output file.  This is done by only using the last argument as
output file if it's a file (it has an extension), and only using the
first argument as flavour if it isn't a file (it doesn't have an
extension).

While we're at it, we make all $xlate calls the same, i.e. the $output
argument is always quoted, and we always die on error when trying to
start $xlate.

There's a perl lesson in this, regarding operator priority...

This will always succeed, even when it fails:

    open FOO, "something" || die "ERR: $!";

The reason is that '||' has higher priority than list operators (a
function is essentially a list operator and gobbles up everything
following it that isn't lower priority), and since a non-empty string
is always true, so that ends up being exactly the same as:

    open FOO, "something";

This, however, will fail if "something" can't be opened:

    open FOO, "something" or die "ERR: $!";

The reason is that 'or' has lower priority that list operators,
i.e. it's performed after the 'open' call.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9884)
2019-09-16 16:29:57 +02:00

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#! /usr/bin/env perl
# Copyright 1995-2016 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
# The inner loop instruction sequence and the IP/FP modifications are from
# Svend Olaf Mikkelsen.
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
require "cbc.pl";
require "desboth.pl";
# base code is in Microsoft
# op dest, source
# format.
#
$output=pop and open STDOUT,">$output";
&asm_init($ARGV[0]);
$L="edi";
$R="esi";
$trans="ebp";
$small_footprint=1 if (grep(/\-DOPENSSL_SMALL_FOOTPRINT/,@ARGV));
# one can discuss setting this variable to 1 unconditionally, as
# the folded loop is only 3% slower than unrolled, but >7 times smaller
&public_label("DES_SPtrans");
&static_label("des_sptrans");
&DES_encrypt_internal();
&DES_decrypt_internal();
&DES_encrypt("DES_encrypt1",1);
&DES_encrypt("DES_encrypt2",0);
&DES_encrypt3("DES_encrypt3",1);
&DES_encrypt3("DES_decrypt3",0);
&cbc("DES_ncbc_encrypt","DES_encrypt1","DES_encrypt1",0,4,5,3,5,-1);
&cbc("DES_ede3_cbc_encrypt","DES_encrypt3","DES_decrypt3",0,6,7,3,4,5);
&DES_SPtrans();
&asm_finish();
close STDOUT;
sub DES_encrypt_internal()
{
&function_begin_B("_x86_DES_encrypt");
if ($small_footprint)
{
&lea("edx",&DWP(128,"ecx"));
&push("edx");
&push("ecx");
&set_label("eloop");
&D_ENCRYPT(0,$L,$R,0,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("");
&D_ENCRYPT(1,$R,$L,2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("");
&add("ecx",16);
&cmp("ecx",&swtmp(1));
&mov(&swtmp(0),"ecx");
&jb(&label("eloop"));
&add("esp",8);
}
else
{
&push("ecx");
for ($i=0; $i<16; $i+=2)
{
&comment("Round $i");
&D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("Round ".sprintf("%d",$i+1));
&D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
}
&add("esp",4);
}
&ret();
&function_end_B("_x86_DES_encrypt");
}
sub DES_decrypt_internal()
{
&function_begin_B("_x86_DES_decrypt");
if ($small_footprint)
{
&push("ecx");
&lea("ecx",&DWP(128,"ecx"));
&push("ecx");
&set_label("dloop");
&D_ENCRYPT(0,$L,$R,-2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("");
&D_ENCRYPT(1,$R,$L,-4,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("");
&sub("ecx",16);
&cmp("ecx",&swtmp(1));
&mov(&swtmp(0),"ecx");
&ja(&label("dloop"));
&add("esp",8);
}
else
{
&push("ecx");
for ($i=15; $i>0; $i-=2)
{
&comment("Round $i");
&D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
&comment("Round ".sprintf("%d",$i-1));
&D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
}
&add("esp",4);
}
&ret();
&function_end_B("_x86_DES_decrypt");
}
sub DES_encrypt
{
local($name,$do_ip)=@_;
&function_begin_B($name);
&push("esi");
&push("edi");
&comment("");
&comment("Load the 2 words");
if ($do_ip)
{
&mov($R,&wparam(0));
&xor( "ecx", "ecx" );
&push("ebx");
&push("ebp");
&mov("eax",&DWP(0,$R,"",0));
&mov("ebx",&wparam(2)); # get encrypt flag
&mov($L,&DWP(4,$R,"",0));
&comment("");
&comment("IP");
&IP_new("eax",$L,$R,3);
}
else
{
&mov("eax",&wparam(0));
&xor( "ecx", "ecx" );
&push("ebx");
&push("ebp");
&mov($R,&DWP(0,"eax","",0));
&mov("ebx",&wparam(2)); # get encrypt flag
&rotl($R,3);
&mov($L,&DWP(4,"eax","",0));
&rotl($L,3);
}
# PIC-ification:-)
&call (&label("pic_point"));
&set_label("pic_point");
&blindpop($trans);
&lea ($trans,&DWP(&label("des_sptrans")."-".&label("pic_point"),$trans));
&mov( "ecx", &wparam(1) );
&cmp("ebx","0");
&je(&label("decrypt"));
&call("_x86_DES_encrypt");
&jmp(&label("done"));
&set_label("decrypt");
&call("_x86_DES_decrypt");
&set_label("done");
if ($do_ip)
{
&comment("");
&comment("FP");
&mov("edx",&wparam(0));
&FP_new($L,$R,"eax",3);
&mov(&DWP(0,"edx","",0),"eax");
&mov(&DWP(4,"edx","",0),$R);
}
else
{
&comment("");
&comment("Fixup");
&rotr($L,3); # r
&mov("eax",&wparam(0));
&rotr($R,3); # l
&mov(&DWP(0,"eax","",0),$L);
&mov(&DWP(4,"eax","",0),$R);
}
&pop("ebp");
&pop("ebx");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}
sub D_ENCRYPT
{
local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t,$wp1)=@_;
&mov( $u, &DWP(&n2a($S*4),$tmp2,"",0));
&xor( $tmp1, $tmp1);
&mov( $t, &DWP(&n2a(($S+1)*4),$tmp2,"",0));
&xor( $u, $R);
&xor( $tmp2, $tmp2);
&xor( $t, $R);
&and( $u, "0xfcfcfcfc" );
&and( $t, "0xcfcfcfcf" );
&movb( &LB($tmp1), &LB($u) );
&movb( &LB($tmp2), &HB($u) );
&rotr( $t, 4 );
&xor( $L, &DWP(" ",$trans,$tmp1,0));
&movb( &LB($tmp1), &LB($t) );
&xor( $L, &DWP("0x200",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&shr( $u, 16);
&xor( $L, &DWP("0x100",$trans,$tmp1,0));
&movb( &LB($tmp1), &HB($u) );
&shr( $t, 16);
&xor( $L, &DWP("0x300",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&and( $u, "0xff" );
&and( $t, "0xff" );
&xor( $L, &DWP("0x600",$trans,$tmp1,0));
&xor( $L, &DWP("0x700",$trans,$tmp2,0));
&mov( $tmp2, $wp1 );
&xor( $L, &DWP("0x400",$trans,$u,0));
&xor( $L, &DWP("0x500",$trans,$t,0));
}
sub n2a
{
sprintf("%d",$_[0]);
}
# now has a side affect of rotating $a by $shift
sub R_PERM_OP
{
local($a,$b,$tt,$shift,$mask,$last)=@_;
&rotl( $a, $shift ) if ($shift != 0);
&mov( $tt, $a );
&xor( $a, $b );
&and( $a, $mask );
# This can never succeed, and besides it is difficult to see what the
# idea was - Ben 13 Feb 99
if (!$last eq $b)
{
&xor( $b, $a );
&xor( $tt, $a );
}
else
{
&xor( $tt, $a );
&xor( $b, $a );
}
&comment("");
}
sub IP_new
{
local($l,$r,$tt,$lr)=@_;
&R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
&R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
&R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
&R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
&R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
if ($lr != 3)
{
if (($lr-3) < 0)
{ &rotr($tt, 3-$lr); }
else { &rotl($tt, $lr-3); }
}
if ($lr != 2)
{
if (($lr-2) < 0)
{ &rotr($r, 2-$lr); }
else { &rotl($r, $lr-2); }
}
}
sub FP_new
{
local($l,$r,$tt,$lr)=@_;
if ($lr != 2)
{
if (($lr-2) < 0)
{ &rotl($r, 2-$lr); }
else { &rotr($r, $lr-2); }
}
if ($lr != 3)
{
if (($lr-3) < 0)
{ &rotl($l, 3-$lr); }
else { &rotr($l, $lr-3); }
}
&R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
&R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
&R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
&R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
&rotr($tt , 4);
}
sub DES_SPtrans
{
&set_label("DES_SPtrans",64);
&set_label("des_sptrans");
&data_word(0x02080800, 0x00080000, 0x02000002, 0x02080802);
&data_word(0x02000000, 0x00080802, 0x00080002, 0x02000002);
&data_word(0x00080802, 0x02080800, 0x02080000, 0x00000802);
&data_word(0x02000802, 0x02000000, 0x00000000, 0x00080002);
&data_word(0x00080000, 0x00000002, 0x02000800, 0x00080800);
&data_word(0x02080802, 0x02080000, 0x00000802, 0x02000800);
&data_word(0x00000002, 0x00000800, 0x00080800, 0x02080002);
&data_word(0x00000800, 0x02000802, 0x02080002, 0x00000000);
&data_word(0x00000000, 0x02080802, 0x02000800, 0x00080002);
&data_word(0x02080800, 0x00080000, 0x00000802, 0x02000800);
&data_word(0x02080002, 0x00000800, 0x00080800, 0x02000002);
&data_word(0x00080802, 0x00000002, 0x02000002, 0x02080000);
&data_word(0x02080802, 0x00080800, 0x02080000, 0x02000802);
&data_word(0x02000000, 0x00000802, 0x00080002, 0x00000000);
&data_word(0x00080000, 0x02000000, 0x02000802, 0x02080800);
&data_word(0x00000002, 0x02080002, 0x00000800, 0x00080802);
# nibble 1
&data_word(0x40108010, 0x00000000, 0x00108000, 0x40100000);
&data_word(0x40000010, 0x00008010, 0x40008000, 0x00108000);
&data_word(0x00008000, 0x40100010, 0x00000010, 0x40008000);
&data_word(0x00100010, 0x40108000, 0x40100000, 0x00000010);
&data_word(0x00100000, 0x40008010, 0x40100010, 0x00008000);
&data_word(0x00108010, 0x40000000, 0x00000000, 0x00100010);
&data_word(0x40008010, 0x00108010, 0x40108000, 0x40000010);
&data_word(0x40000000, 0x00100000, 0x00008010, 0x40108010);
&data_word(0x00100010, 0x40108000, 0x40008000, 0x00108010);
&data_word(0x40108010, 0x00100010, 0x40000010, 0x00000000);
&data_word(0x40000000, 0x00008010, 0x00100000, 0x40100010);
&data_word(0x00008000, 0x40000000, 0x00108010, 0x40008010);
&data_word(0x40108000, 0x00008000, 0x00000000, 0x40000010);
&data_word(0x00000010, 0x40108010, 0x00108000, 0x40100000);
&data_word(0x40100010, 0x00100000, 0x00008010, 0x40008000);
&data_word(0x40008010, 0x00000010, 0x40100000, 0x00108000);
# nibble 2
&data_word(0x04000001, 0x04040100, 0x00000100, 0x04000101);
&data_word(0x00040001, 0x04000000, 0x04000101, 0x00040100);
&data_word(0x04000100, 0x00040000, 0x04040000, 0x00000001);
&data_word(0x04040101, 0x00000101, 0x00000001, 0x04040001);
&data_word(0x00000000, 0x00040001, 0x04040100, 0x00000100);
&data_word(0x00000101, 0x04040101, 0x00040000, 0x04000001);
&data_word(0x04040001, 0x04000100, 0x00040101, 0x04040000);
&data_word(0x00040100, 0x00000000, 0x04000000, 0x00040101);
&data_word(0x04040100, 0x00000100, 0x00000001, 0x00040000);
&data_word(0x00000101, 0x00040001, 0x04040000, 0x04000101);
&data_word(0x00000000, 0x04040100, 0x00040100, 0x04040001);
&data_word(0x00040001, 0x04000000, 0x04040101, 0x00000001);
&data_word(0x00040101, 0x04000001, 0x04000000, 0x04040101);
&data_word(0x00040000, 0x04000100, 0x04000101, 0x00040100);
&data_word(0x04000100, 0x00000000, 0x04040001, 0x00000101);
&data_word(0x04000001, 0x00040101, 0x00000100, 0x04040000);
# nibble 3
&data_word(0x00401008, 0x10001000, 0x00000008, 0x10401008);
&data_word(0x00000000, 0x10400000, 0x10001008, 0x00400008);
&data_word(0x10401000, 0x10000008, 0x10000000, 0x00001008);
&data_word(0x10000008, 0x00401008, 0x00400000, 0x10000000);
&data_word(0x10400008, 0x00401000, 0x00001000, 0x00000008);
&data_word(0x00401000, 0x10001008, 0x10400000, 0x00001000);
&data_word(0x00001008, 0x00000000, 0x00400008, 0x10401000);
&data_word(0x10001000, 0x10400008, 0x10401008, 0x00400000);
&data_word(0x10400008, 0x00001008, 0x00400000, 0x10000008);
&data_word(0x00401000, 0x10001000, 0x00000008, 0x10400000);
&data_word(0x10001008, 0x00000000, 0x00001000, 0x00400008);
&data_word(0x00000000, 0x10400008, 0x10401000, 0x00001000);
&data_word(0x10000000, 0x10401008, 0x00401008, 0x00400000);
&data_word(0x10401008, 0x00000008, 0x10001000, 0x00401008);
&data_word(0x00400008, 0x00401000, 0x10400000, 0x10001008);
&data_word(0x00001008, 0x10000000, 0x10000008, 0x10401000);
# nibble 4
&data_word(0x08000000, 0x00010000, 0x00000400, 0x08010420);
&data_word(0x08010020, 0x08000400, 0x00010420, 0x08010000);
&data_word(0x00010000, 0x00000020, 0x08000020, 0x00010400);
&data_word(0x08000420, 0x08010020, 0x08010400, 0x00000000);
&data_word(0x00010400, 0x08000000, 0x00010020, 0x00000420);
&data_word(0x08000400, 0x00010420, 0x00000000, 0x08000020);
&data_word(0x00000020, 0x08000420, 0x08010420, 0x00010020);
&data_word(0x08010000, 0x00000400, 0x00000420, 0x08010400);
&data_word(0x08010400, 0x08000420, 0x00010020, 0x08010000);
&data_word(0x00010000, 0x00000020, 0x08000020, 0x08000400);
&data_word(0x08000000, 0x00010400, 0x08010420, 0x00000000);
&data_word(0x00010420, 0x08000000, 0x00000400, 0x00010020);
&data_word(0x08000420, 0x00000400, 0x00000000, 0x08010420);
&data_word(0x08010020, 0x08010400, 0x00000420, 0x00010000);
&data_word(0x00010400, 0x08010020, 0x08000400, 0x00000420);
&data_word(0x00000020, 0x00010420, 0x08010000, 0x08000020);
# nibble 5
&data_word(0x80000040, 0x00200040, 0x00000000, 0x80202000);
&data_word(0x00200040, 0x00002000, 0x80002040, 0x00200000);
&data_word(0x00002040, 0x80202040, 0x00202000, 0x80000000);
&data_word(0x80002000, 0x80000040, 0x80200000, 0x00202040);
&data_word(0x00200000, 0x80002040, 0x80200040, 0x00000000);
&data_word(0x00002000, 0x00000040, 0x80202000, 0x80200040);
&data_word(0x80202040, 0x80200000, 0x80000000, 0x00002040);
&data_word(0x00000040, 0x00202000, 0x00202040, 0x80002000);
&data_word(0x00002040, 0x80000000, 0x80002000, 0x00202040);
&data_word(0x80202000, 0x00200040, 0x00000000, 0x80002000);
&data_word(0x80000000, 0x00002000, 0x80200040, 0x00200000);
&data_word(0x00200040, 0x80202040, 0x00202000, 0x00000040);
&data_word(0x80202040, 0x00202000, 0x00200000, 0x80002040);
&data_word(0x80000040, 0x80200000, 0x00202040, 0x00000000);
&data_word(0x00002000, 0x80000040, 0x80002040, 0x80202000);
&data_word(0x80200000, 0x00002040, 0x00000040, 0x80200040);
# nibble 6
&data_word(0x00004000, 0x00000200, 0x01000200, 0x01000004);
&data_word(0x01004204, 0x00004004, 0x00004200, 0x00000000);
&data_word(0x01000000, 0x01000204, 0x00000204, 0x01004000);
&data_word(0x00000004, 0x01004200, 0x01004000, 0x00000204);
&data_word(0x01000204, 0x00004000, 0x00004004, 0x01004204);
&data_word(0x00000000, 0x01000200, 0x01000004, 0x00004200);
&data_word(0x01004004, 0x00004204, 0x01004200, 0x00000004);
&data_word(0x00004204, 0x01004004, 0x00000200, 0x01000000);
&data_word(0x00004204, 0x01004000, 0x01004004, 0x00000204);
&data_word(0x00004000, 0x00000200, 0x01000000, 0x01004004);
&data_word(0x01000204, 0x00004204, 0x00004200, 0x00000000);
&data_word(0x00000200, 0x01000004, 0x00000004, 0x01000200);
&data_word(0x00000000, 0x01000204, 0x01000200, 0x00004200);
&data_word(0x00000204, 0x00004000, 0x01004204, 0x01000000);
&data_word(0x01004200, 0x00000004, 0x00004004, 0x01004204);
&data_word(0x01000004, 0x01004200, 0x01004000, 0x00004004);
# nibble 7
&data_word(0x20800080, 0x20820000, 0x00020080, 0x00000000);
&data_word(0x20020000, 0x00800080, 0x20800000, 0x20820080);
&data_word(0x00000080, 0x20000000, 0x00820000, 0x00020080);
&data_word(0x00820080, 0x20020080, 0x20000080, 0x20800000);
&data_word(0x00020000, 0x00820080, 0x00800080, 0x20020000);
&data_word(0x20820080, 0x20000080, 0x00000000, 0x00820000);
&data_word(0x20000000, 0x00800000, 0x20020080, 0x20800080);
&data_word(0x00800000, 0x00020000, 0x20820000, 0x00000080);
&data_word(0x00800000, 0x00020000, 0x20000080, 0x20820080);
&data_word(0x00020080, 0x20000000, 0x00000000, 0x00820000);
&data_word(0x20800080, 0x20020080, 0x20020000, 0x00800080);
&data_word(0x20820000, 0x00000080, 0x00800080, 0x20020000);
&data_word(0x20820080, 0x00800000, 0x20800000, 0x20000080);
&data_word(0x00820000, 0x00020080, 0x20020080, 0x20800000);
&data_word(0x00000080, 0x20820000, 0x00820080, 0x00000000);
&data_word(0x20000000, 0x20800080, 0x00020000, 0x00820080);
}
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