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openssl/crypto/md5/asm/md5-586.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
# Normal is the
# md5_block_x86(MD5_CTX *c, ULONG *X);
# version, non-normal is the
# md5_block_x86(MD5_CTX *c, ULONG *X,int blocks);
$normal=0;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
# $output is the last argument if it looks like a file (it has an extension)
$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
$output and open STDOUT,">$output";
&asm_init($ARGV[0]);
$A="eax";
$B="ebx";
$C="ecx";
$D="edx";
$tmp1="edi";
$tmp2="ebp";
$X="esi";
# What we need to load into $tmp for the next round
%Ltmp1=("R0",&Np($C), "R1",&Np($C), "R2",&Np($C), "R3",&Np($D));
@xo=(
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, # R0
1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, # R1
5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, # R2
0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9, # R3
);
&md5_block("md5_block_asm_data_order");
&asm_finish();
close STDOUT;
sub Np
{
local($p)=@_;
local(%n)=($A,$D,$B,$A,$C,$B,$D,$C);
return($n{$p});
}
sub R0
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&mov($tmp1,$C) if $pos < 0;
&mov($tmp2,&DWP($xo[$ki]*4,$K,"",0)) if $pos < 0; # very first one
# body proper
&comment("R0 $ki");
&xor($tmp1,$d); # F function - part 2
&and($tmp1,$b); # F function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$d); # F function - part 4
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&add($a,$tmp1);
&rotl($a,$s);
&mov($tmp1,&Np($c)) if $pos < 1; # next tmp1 for R0
&mov($tmp1,&Np($c)) if $pos == 1; # next tmp1 for R1
&add($a,$b);
}
sub R1
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&comment("R1 $ki");
&xor($tmp1,$b); # G function - part 2
&and($tmp1,$d); # G function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$c); # G function - part 4
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&add($a,$tmp1);
&mov($tmp1,&Np($c)) if $pos < 1; # G function - part 1
&mov($tmp1,&Np($c)) if $pos == 1; # G function - part 1
&rotl($a,$s);
&add($a,$b);
}
sub R2
{
local($n,$pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
# This one is different, only 3 logical operations
if (($n & 1) == 0)
{
&comment("R2 $ki");
# make sure to do 'D' first, not 'B', else we clash with
# the last add from the previous round.
&xor($tmp1,$d); # H function - part 2
&xor($tmp1,$b); # H function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&add($a,$tmp1);
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0));
&rotl($a,$s);
&mov($tmp1,&Np($c));
}
else
{
&comment("R2 $ki");
# make sure to do 'D' first, not 'B', else we clash with
# the last add from the previous round.
&add($b,$c); # MOVED FORWARD
&xor($tmp1,$d); # H function - part 2
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$b); # H function - part 3
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&add($a,$tmp1);
&mov($tmp1,&Np($c)) if $pos < 1; # H function - part 1
&mov($tmp1,-1) if $pos == 1; # I function - part 1
&rotl($a,$s);
&add($a,$b);
}
}
sub R3
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&comment("R3 $ki");
# &not($tmp1)
&xor($tmp1,$d) if $pos < 0; # I function - part 2
&or($tmp1,$b); # I function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$c); # I function - part 4
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if $pos != 2; # load X/k value
&mov($tmp2,&wparam(0)) if $pos == 2;
&add($a,$tmp1);
&mov($tmp1,-1) if $pos < 1; # H function - part 1
&add($K,64) if $pos >=1 && !$normal;
&rotl($a,$s);
&xor($tmp1,&Np($d)) if $pos <= 0; # I function - part = first time
&mov($tmp1,&DWP( 0,$tmp2,"",0)) if $pos > 0;
&add($a,$b);
}
sub md5_block
{
local($name)=@_;
&function_begin_B($name,"",3);
# parameter 1 is the MD5_CTX structure.
# A 0
# B 4
# C 8
# D 12
&push("esi");
&push("edi");
&mov($tmp1, &wparam(0)); # edi
&mov($X, &wparam(1)); # esi
&mov($C, &wparam(2));
&push("ebp");
&shl($C, 6);
&push("ebx");
&add($C, $X); # offset we end at
&sub($C, 64);
&mov($A, &DWP( 0,$tmp1,"",0));
&push($C); # Put on the TOS
&mov($B, &DWP( 4,$tmp1,"",0));
&mov($C, &DWP( 8,$tmp1,"",0));
&mov($D, &DWP(12,$tmp1,"",0));
&set_label("start") unless $normal;
&comment("");
&comment("R0 section");
&R0(-2,$A,$B,$C,$D,$X, 0, 7,0xd76aa478);
&R0( 0,$D,$A,$B,$C,$X, 1,12,0xe8c7b756);
&R0( 0,$C,$D,$A,$B,$X, 2,17,0x242070db);
&R0( 0,$B,$C,$D,$A,$X, 3,22,0xc1bdceee);
&R0( 0,$A,$B,$C,$D,$X, 4, 7,0xf57c0faf);
&R0( 0,$D,$A,$B,$C,$X, 5,12,0x4787c62a);
&R0( 0,$C,$D,$A,$B,$X, 6,17,0xa8304613);
&R0( 0,$B,$C,$D,$A,$X, 7,22,0xfd469501);
&R0( 0,$A,$B,$C,$D,$X, 8, 7,0x698098d8);
&R0( 0,$D,$A,$B,$C,$X, 9,12,0x8b44f7af);
&R0( 0,$C,$D,$A,$B,$X,10,17,0xffff5bb1);
&R0( 0,$B,$C,$D,$A,$X,11,22,0x895cd7be);
&R0( 0,$A,$B,$C,$D,$X,12, 7,0x6b901122);
&R0( 0,$D,$A,$B,$C,$X,13,12,0xfd987193);
&R0( 0,$C,$D,$A,$B,$X,14,17,0xa679438e);
&R0( 1,$B,$C,$D,$A,$X,15,22,0x49b40821);
&comment("");
&comment("R1 section");
&R1(-1,$A,$B,$C,$D,$X,16, 5,0xf61e2562);
&R1( 0,$D,$A,$B,$C,$X,17, 9,0xc040b340);
&R1( 0,$C,$D,$A,$B,$X,18,14,0x265e5a51);
&R1( 0,$B,$C,$D,$A,$X,19,20,0xe9b6c7aa);
&R1( 0,$A,$B,$C,$D,$X,20, 5,0xd62f105d);
&R1( 0,$D,$A,$B,$C,$X,21, 9,0x02441453);
&R1( 0,$C,$D,$A,$B,$X,22,14,0xd8a1e681);
&R1( 0,$B,$C,$D,$A,$X,23,20,0xe7d3fbc8);
&R1( 0,$A,$B,$C,$D,$X,24, 5,0x21e1cde6);
&R1( 0,$D,$A,$B,$C,$X,25, 9,0xc33707d6);
&R1( 0,$C,$D,$A,$B,$X,26,14,0xf4d50d87);
&R1( 0,$B,$C,$D,$A,$X,27,20,0x455a14ed);
&R1( 0,$A,$B,$C,$D,$X,28, 5,0xa9e3e905);
&R1( 0,$D,$A,$B,$C,$X,29, 9,0xfcefa3f8);
&R1( 0,$C,$D,$A,$B,$X,30,14,0x676f02d9);
&R1( 1,$B,$C,$D,$A,$X,31,20,0x8d2a4c8a);
&comment("");
&comment("R2 section");
&R2( 0,-1,$A,$B,$C,$D,$X,32, 4,0xfffa3942);
&R2( 1, 0,$D,$A,$B,$C,$X,33,11,0x8771f681);
&R2( 2, 0,$C,$D,$A,$B,$X,34,16,0x6d9d6122);
&R2( 3, 0,$B,$C,$D,$A,$X,35,23,0xfde5380c);
&R2( 4, 0,$A,$B,$C,$D,$X,36, 4,0xa4beea44);
&R2( 5, 0,$D,$A,$B,$C,$X,37,11,0x4bdecfa9);
&R2( 6, 0,$C,$D,$A,$B,$X,38,16,0xf6bb4b60);
&R2( 7, 0,$B,$C,$D,$A,$X,39,23,0xbebfbc70);
&R2( 8, 0,$A,$B,$C,$D,$X,40, 4,0x289b7ec6);
&R2( 9, 0,$D,$A,$B,$C,$X,41,11,0xeaa127fa);
&R2(10, 0,$C,$D,$A,$B,$X,42,16,0xd4ef3085);
&R2(11, 0,$B,$C,$D,$A,$X,43,23,0x04881d05);
&R2(12, 0,$A,$B,$C,$D,$X,44, 4,0xd9d4d039);
&R2(13, 0,$D,$A,$B,$C,$X,45,11,0xe6db99e5);
&R2(14, 0,$C,$D,$A,$B,$X,46,16,0x1fa27cf8);
&R2(15, 1,$B,$C,$D,$A,$X,47,23,0xc4ac5665);
&comment("");
&comment("R3 section");
&R3(-1,$A,$B,$C,$D,$X,48, 6,0xf4292244);
&R3( 0,$D,$A,$B,$C,$X,49,10,0x432aff97);
&R3( 0,$C,$D,$A,$B,$X,50,15,0xab9423a7);
&R3( 0,$B,$C,$D,$A,$X,51,21,0xfc93a039);
&R3( 0,$A,$B,$C,$D,$X,52, 6,0x655b59c3);
&R3( 0,$D,$A,$B,$C,$X,53,10,0x8f0ccc92);
&R3( 0,$C,$D,$A,$B,$X,54,15,0xffeff47d);
&R3( 0,$B,$C,$D,$A,$X,55,21,0x85845dd1);
&R3( 0,$A,$B,$C,$D,$X,56, 6,0x6fa87e4f);
&R3( 0,$D,$A,$B,$C,$X,57,10,0xfe2ce6e0);
&R3( 0,$C,$D,$A,$B,$X,58,15,0xa3014314);
&R3( 0,$B,$C,$D,$A,$X,59,21,0x4e0811a1);
&R3( 0,$A,$B,$C,$D,$X,60, 6,0xf7537e82);
&R3( 0,$D,$A,$B,$C,$X,61,10,0xbd3af235);
&R3( 0,$C,$D,$A,$B,$X,62,15,0x2ad7d2bb);
&R3( 2,$B,$C,$D,$A,$X,63,21,0xeb86d391);
# &mov($tmp2,&wparam(0)); # done in the last R3
# &mov($tmp1, &DWP( 0,$tmp2,"",0)); # done is the last R3
&add($A,$tmp1);
&mov($tmp1, &DWP( 4,$tmp2,"",0));
&add($B,$tmp1);
&mov($tmp1, &DWP( 8,$tmp2,"",0));
&add($C,$tmp1);
&mov($tmp1, &DWP(12,$tmp2,"",0));
&add($D,$tmp1);
&mov(&DWP( 0,$tmp2,"",0),$A);
&mov(&DWP( 4,$tmp2,"",0),$B);
&mov($tmp1,&swtmp(0)) unless $normal;
&mov(&DWP( 8,$tmp2,"",0),$C);
&mov(&DWP(12,$tmp2,"",0),$D);
&cmp($tmp1,$X) unless $normal; # check count
&jae(&label("start")) unless $normal;
&pop("eax"); # pop the temp variable off the stack
&pop("ebx");
&pop("ebp");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}
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