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#!/usr/local/bin/perl
# x86 assember
sub bn_mul_words
{
local($name)=@_;
&function_begin($name,"");
&comment("");
$Low="eax";
$High="edx";
$a="ebx";
$w="ecx";
$r="edi";
$c="esi";
$num="ebp";
&xor($c,$c); # clear carry
&mov($r,&wparam(0)); #
&mov($a,&wparam(1)); #
&mov($num,&wparam(2)); #
&mov($w,&wparam(3)); #
&and($num,0xfffffff8); # num / 8
&jz(&label("mw_finish"));
&set_label("mw_loop",0);
for ($i=0; $i<32; $i+=4)
{
&comment("Round $i");
&mov("eax",&DWP($i,$a,"",0)); # *a
&mul($w); # *a * w
&add("eax",$c); # L(t)+=c
# XXX
&adc("edx",0); # H(t)+=carry
&mov(&DWP($i,$r,"",0),"eax"); # *r= L(t);
&mov($c,"edx"); # c= H(t);
}
&comment("");
&add($a,32);
&add($r,32);
&sub($num,8);
&jz(&label("mw_finish"));
&jmp(&label("mw_loop"));
&set_label("mw_finish",0);
&mov($num,&wparam(2)); # get num
&and($num,7);
&jnz(&label("mw_finish2"));
&jmp(&label("mw_end"));
&set_label("mw_finish2",1);
for ($i=0; $i<7; $i++)
{
&comment("Tail Round $i");
&mov("eax",&DWP($i*4,$a,"",0));# *a
&mul($w); # *a * w
&add("eax",$c); # L(t)+=c
# XXX
&adc("edx",0); # H(t)+=carry
&mov(&DWP($i*4,$r,"",0),"eax");# *r= L(t);
&mov($c,"edx"); # c= H(t);
&dec($num) if ($i != 7-1);
&jz(&label("mw_end")) if ($i != 7-1);
}
&set_label("mw_end",0);
&mov("eax",$c);
&function_end($name);
}
1;
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