Initial Commit

openssl-1.0.2f/crypto/bn/asm/x86/mul.pl

@@ -0,0 +1,77 @@
+#!/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;