ref: e86bd6a50933e99899d63de755d81b9805827a15
dir: /third_party/boringssl/src/crypto/fipsmodule/bn/asm/co-586.pl/
#! /usr/bin/env perl
# Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (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
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../../perlasm");
require "x86asm.pl";
$output = pop;
open STDOUT,">$output";
&asm_init($ARGV[0]);
&bn_mul_comba("bn_mul_comba8",8);
&bn_mul_comba("bn_mul_comba4",4);
&bn_sqr_comba("bn_sqr_comba8",8);
&bn_sqr_comba("bn_sqr_comba4",4);
&asm_finish();
close STDOUT or die "error closing STDOUT: $!";
sub mul_add_c
{
local($a,$ai,$b,$bi,$c0,$c1,$c2,$pos,$i,$na,$nb)=@_;
# pos == -1 if eax and edx are pre-loaded, 0 to load from next
# words, and 1 if load return value
&comment("mul a[$ai]*b[$bi]");
# "eax" and "edx" will always be pre-loaded.
# &mov("eax",&DWP($ai*4,$a,"",0)) ;
# &mov("edx",&DWP($bi*4,$b,"",0));
&mul("edx");
&add($c0,"eax");
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 0; # laod next a
&mov("eax",&wparam(0)) if $pos > 0; # load r[]
###
&adc($c1,"edx");
&mov("edx",&DWP(($nb)*4,$b,"",0)) if $pos == 0; # laod next b
&mov("edx",&DWP(($nb)*4,$b,"",0)) if $pos == 1; # laod next b
###
&adc($c2,0);
# is pos > 1, it means it is the last loop
&mov(&DWP($i*4,"eax","",0),$c0) if $pos > 0; # save r[];
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 1; # laod next a
}
sub sqr_add_c
{
local($r,$a,$ai,$bi,$c0,$c1,$c2,$pos,$i,$na,$nb)=@_;
# pos == -1 if eax and edx are pre-loaded, 0 to load from next
# words, and 1 if load return value
&comment("sqr a[$ai]*a[$bi]");
# "eax" and "edx" will always be pre-loaded.
# &mov("eax",&DWP($ai*4,$a,"",0)) ;
# &mov("edx",&DWP($bi*4,$b,"",0));
if ($ai == $bi)
{ &mul("eax");}
else
{ &mul("edx");}
&add($c0,"eax");
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 0; # load next a
###
&adc($c1,"edx");
&mov("edx",&DWP(($nb)*4,$a,"",0)) if ($pos == 1) && ($na != $nb);
###
&adc($c2,0);
# is pos > 1, it means it is the last loop
&mov(&DWP($i*4,$r,"",0),$c0) if $pos > 0; # save r[];
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 1; # load next b
}
sub sqr_add_c2
{
local($r,$a,$ai,$bi,$c0,$c1,$c2,$pos,$i,$na,$nb)=@_;
# pos == -1 if eax and edx are pre-loaded, 0 to load from next
# words, and 1 if load return value
&comment("sqr a[$ai]*a[$bi]");
# "eax" and "edx" will always be pre-loaded.
# &mov("eax",&DWP($ai*4,$a,"",0)) ;
# &mov("edx",&DWP($bi*4,$a,"",0));
if ($ai == $bi)
{ &mul("eax");}
else
{ &mul("edx");}
&add("eax","eax");
###
&adc("edx","edx");
###
&adc($c2,0);
&add($c0,"eax");
&adc($c1,"edx");
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 0; # load next a
&mov("eax",&DWP(($na)*4,$a,"",0)) if $pos == 1; # load next b
&adc($c2,0);
&mov(&DWP($i*4,$r,"",0),$c0) if $pos > 0; # save r[];
&mov("edx",&DWP(($nb)*4,$a,"",0)) if ($pos <= 1) && ($na != $nb);
###
}
sub bn_mul_comba
{
local($name,$num)=@_;
local($a,$b,$c0,$c1,$c2);
local($i,$as,$ae,$bs,$be,$ai,$bi);
local($tot,$end);
&function_begin_B($name,"");
$c0="ebx";
$c1="ecx";
$c2="ebp";
$a="esi";
$b="edi";
$as=0;
$ae=0;
$bs=0;
$be=0;
$tot=$num+$num-1;
&push("esi");
&mov($a,&wparam(1));
&push("edi");
&mov($b,&wparam(2));
&push("ebp");
&push("ebx");
&xor($c0,$c0);
&mov("eax",&DWP(0,$a,"",0)); # load the first word
&xor($c1,$c1);
&mov("edx",&DWP(0,$b,"",0)); # load the first second
for ($i=0; $i<$tot; $i++)
{
$ai=$as;
$bi=$bs;
$end=$be+1;
&comment("################## Calculate word $i");
for ($j=$bs; $j<$end; $j++)
{
&xor($c2,$c2) if ($j == $bs);
if (($j+1) == $end)
{
$v=1;
$v=2 if (($i+1) == $tot);
}
else
{ $v=0; }
if (($j+1) != $end)
{
$na=($ai-1);
$nb=($bi+1);
}
else
{
$na=$as+($i < ($num-1));
$nb=$bs+($i >= ($num-1));
}
#printf STDERR "[$ai,$bi] -> [$na,$nb]\n";
&mul_add_c($a,$ai,$b,$bi,$c0,$c1,$c2,$v,$i,$na,$nb);
if ($v)
{
&comment("saved r[$i]");
# &mov("eax",&wparam(0));
# &mov(&DWP($i*4,"eax","",0),$c0);
($c0,$c1,$c2)=($c1,$c2,$c0);
}
$ai--;
$bi++;
}
$as++ if ($i < ($num-1));
$ae++ if ($i >= ($num-1));
$bs++ if ($i >= ($num-1));
$be++ if ($i < ($num-1));
}
&comment("save r[$i]");
# &mov("eax",&wparam(0));
&mov(&DWP($i*4,"eax","",0),$c0);
&pop("ebx");
&pop("ebp");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}
sub bn_sqr_comba
{
local($name,$num)=@_;
local($r,$a,$c0,$c1,$c2)=@_;
local($i,$as,$ae,$bs,$be,$ai,$bi);
local($b,$tot,$end,$half);
&function_begin_B($name,"");
$c0="ebx";
$c1="ecx";
$c2="ebp";
$a="esi";
$r="edi";
&push("esi");
&push("edi");
&push("ebp");
&push("ebx");
&mov($r,&wparam(0));
&mov($a,&wparam(1));
&xor($c0,$c0);
&xor($c1,$c1);
&mov("eax",&DWP(0,$a,"",0)); # load the first word
$as=0;
$ae=0;
$bs=0;
$be=0;
$tot=$num+$num-1;
for ($i=0; $i<$tot; $i++)
{
$ai=$as;
$bi=$bs;
$end=$be+1;
&comment("############### Calculate word $i");
for ($j=$bs; $j<$end; $j++)
{
&xor($c2,$c2) if ($j == $bs);
if (($ai-1) < ($bi+1))
{
$v=1;
$v=2 if ($i+1) == $tot;
}
else
{ $v=0; }
if (!$v)
{
$na=$ai-1;
$nb=$bi+1;
}
else
{
$na=$as+($i < ($num-1));
$nb=$bs+($i >= ($num-1));
}
if ($ai == $bi)
{
&sqr_add_c($r,$a,$ai,$bi,
$c0,$c1,$c2,$v,$i,$na,$nb);
}
else
{
&sqr_add_c2($r,$a,$ai,$bi,
$c0,$c1,$c2,$v,$i,$na,$nb);
}
if ($v)
{
&comment("saved r[$i]");
#&mov(&DWP($i*4,$r,"",0),$c0);
($c0,$c1,$c2)=($c1,$c2,$c0);
last;
}
$ai--;
$bi++;
}
$as++ if ($i < ($num-1));
$ae++ if ($i >= ($num-1));
$bs++ if ($i >= ($num-1));
$be++ if ($i < ($num-1));
}
&mov(&DWP($i*4,$r,"",0),$c0);
&pop("ebx");
&pop("ebp");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}