sub bn_mul_add_words
{
local($name)=@_;
&function_begin($name,"");
&comment("");
$Low="eax";
$High="edx";
$a="ebx";
$w="ebp";
$r="edi";
$c="esi";
&xor($c,$c); &mov($r,&wparam(0));
&mov("ecx",&wparam(2)); &mov($a,&wparam(1));
&and("ecx",0xfffffff8); &mov($w,&wparam(3));
&push("ecx");
&jz(&label("maw_finish"));
&set_label("maw_loop",0);
&mov(&swtmp(0),"ecx");
for ($i=0; $i<32; $i+=4)
{
&comment("Round $i");
&mov("eax",&DWP($i,$a,"",0)); &mul($w); &add("eax",$c); &mov($c,&DWP($i,$r,"",0)); &adc("edx",0); &add("eax",$c); &adc("edx",0); &mov(&DWP($i,$r,"",0),"eax"); &mov($c,"edx"); }
&comment("");
&mov("ecx",&swtmp(0)); &add($a,32);
&add($r,32);
&sub("ecx",8);
&jnz(&label("maw_loop"));
&set_label("maw_finish",0);
&mov("ecx",&wparam(2)); &and("ecx",7);
&jnz(&label("maw_finish2")); &jmp(&label("maw_end"));
&set_label("maw_finish2",1);
for ($i=0; $i<7; $i++)
{
&comment("Tail Round $i");
&mov("eax",&DWP($i*4,$a,"",0)); &mul($w); &add("eax",$c); &mov($c,&DWP($i*4,$r,"",0)); &adc("edx",0); &add("eax",$c);
&adc("edx",0); &dec("ecx") if ($i != 7-1);
&mov(&DWP($i*4,$r,"",0),"eax"); &mov($c,"edx"); &jz(&label("maw_end")) if ($i != 7-1);
}
&set_label("maw_end",0);
&mov("eax",$c);
&pop("ecx");
&function_end($name);
}
1;