From 7236757e326b2c939f79a4239220a0cc2bf30ef5 Mon Sep 17 00:00:00 2001
From: jsing <>
Date: Wed, 22 Feb 2023 05:57:19 +0000
Subject: Replace bn_sub_part_words() with bn_sub().

Now that bn_sub() handles word arrays with potentially different lengths,
we no longer need bn_sub_part_words() - call bn_sub() instead. This allows
us to entirely remove the unnecessarily complex bn_sub_part_words() code.

ok tb@
---
 src/lib/libcrypto/bn/asm/bn-586.pl | 210 -------------------------------------
 1 file changed, 210 deletions(-)

(limited to 'src/lib/libcrypto/bn/asm')

diff --git a/src/lib/libcrypto/bn/asm/bn-586.pl b/src/lib/libcrypto/bn/asm/bn-586.pl
index b502fe60ee..71b775af8d 100644
--- a/src/lib/libcrypto/bn/asm/bn-586.pl
+++ b/src/lib/libcrypto/bn/asm/bn-586.pl
@@ -17,7 +17,6 @@ for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
 &bn_div_words("bn_div_words");
 &bn_add_words("bn_add_words");
 &bn_sub_words("bn_sub_words");
-&bn_sub_part_words("bn_sub_part_words");
 
 &asm_finish();
 
@@ -566,212 +565,3 @@ sub bn_sub_words
 
 	&function_end($name);
 	}
-
-sub bn_sub_part_words
-	{
-	local($name)=@_;
-
-	&function_begin($name,"");
-
-	&comment("");
-	$a="esi";
-	$b="edi";
-	$c="eax";
-	$r="ebx";
-	$tmp1="ecx";
-	$tmp2="edx";
-	$num="ebp";
-
-	&mov($r,&wparam(0));	# get r
-	 &mov($a,&wparam(1));	# get a
-	&mov($b,&wparam(2));	# get b
-	 &mov($num,&wparam(3));	# get num
-	&xor($c,$c);		# clear carry
-	 &and($num,0xfffffff8);	# num / 8
-
-	&jz(&label("aw_finish"));
-
-	&set_label("aw_loop",0);
-	for ($i=0; $i<8; $i++)
-		{
-		&comment("Round $i");
-
-		&mov($tmp1,&DWP($i*4,$a,"",0)); 	# *a
-		 &mov($tmp2,&DWP($i*4,$b,"",0)); 	# *b
-		&sub($tmp1,$c);
-		 &mov($c,0);
-		&adc($c,$c);
-		 &sub($tmp1,$tmp2);
-		&adc($c,0);
-		 &mov(&DWP($i*4,$r,"",0),$tmp1); 	# *r
-		}
-
-	&comment("");
-	&add($a,32);
-	 &add($b,32);
-	&add($r,32);
-	 &sub($num,8);
-	&jnz(&label("aw_loop"));
-
-	&set_label("aw_finish",0);
-	&mov($num,&wparam(3));	# get num
-	&and($num,7);
-	 &jz(&label("aw_end"));
-
-	for ($i=0; $i<7; $i++)
-		{
-		&comment("Tail Round $i");
-		&mov($tmp1,&DWP(0,$a,"",0));	# *a
-		 &mov($tmp2,&DWP(0,$b,"",0));# *b
-		&sub($tmp1,$c);
-		 &mov($c,0);
-		&adc($c,$c);
-		 &sub($tmp1,$tmp2);
-		&adc($c,0);
-		&mov(&DWP(0,$r,"",0),$tmp1);	# *r
-		&add($a, 4);
-		&add($b, 4);
-		&add($r, 4);
-		 &dec($num) if ($i != 6);
-		 &jz(&label("aw_end")) if ($i != 6);
-		}
-	&set_label("aw_end",0);
-
-	&cmp(&wparam(4),0);
-	&je(&label("pw_end"));
-
-	&mov($num,&wparam(4));	# get dl
-	&cmp($num,0);
-	&je(&label("pw_end"));
-	&jge(&label("pw_pos"));
-
-	&comment("pw_neg");
-	&mov($tmp2,0);
-	&sub($tmp2,$num);
-	&mov($num,$tmp2);
-	&and($num,0xfffffff8);	# num / 8
-	&jz(&label("pw_neg_finish"));
-
-	&set_label("pw_neg_loop",0);
-	for ($i=0; $i<8; $i++)
-	{
-	    &comment("dl<0 Round $i");
-
-	    &mov($tmp1,0);
-	    &mov($tmp2,&DWP($i*4,$b,"",0)); 	# *b
-	    &sub($tmp1,$c);
-	    &mov($c,0);
-	    &adc($c,$c);
-	    &sub($tmp1,$tmp2);
-	    &adc($c,0);
-	    &mov(&DWP($i*4,$r,"",0),$tmp1); 	# *r
-	}
-	    
-	&comment("");
-	&add($b,32);
-	&add($r,32);
-	&sub($num,8);
-	&jnz(&label("pw_neg_loop"));
-	    
-	&set_label("pw_neg_finish",0);
-	&mov($tmp2,&wparam(4));	# get dl
-	&mov($num,0);
-	&sub($num,$tmp2);
-	&and($num,7);
-	&jz(&label("pw_end"));
-	    
-	for ($i=0; $i<7; $i++)
-	{
-	    &comment("dl<0 Tail Round $i");
-	    &mov($tmp1,0);
-	    &mov($tmp2,&DWP($i*4,$b,"",0));# *b
-	    &sub($tmp1,$c);
-	    &mov($c,0);
-	    &adc($c,$c);
-	    &sub($tmp1,$tmp2);
-	    &adc($c,0);
-	    &dec($num) if ($i != 6);
-	    &mov(&DWP($i*4,$r,"",0),$tmp1);	# *r
-	    &jz(&label("pw_end")) if ($i != 6);
-	}
-
-	&jmp(&label("pw_end"));
-	
-	&set_label("pw_pos",0);
-	
-	&and($num,0xfffffff8);	# num / 8
-	&jz(&label("pw_pos_finish"));
-
-	&set_label("pw_pos_loop",0);
-
-	for ($i=0; $i<8; $i++)
-	{
-	    &comment("dl>0 Round $i");
-
-	    &mov($tmp1,&DWP($i*4,$a,"",0));	# *a
-	    &sub($tmp1,$c);
-	    &mov(&DWP($i*4,$r,"",0),$tmp1);	# *r
-	    &jnc(&label("pw_nc".$i));
-	}
-	    
-	&comment("");
-	&add($a,32);
-	&add($r,32);
-	&sub($num,8);
-	&jnz(&label("pw_pos_loop"));
-	    
-	&set_label("pw_pos_finish",0);
-	&mov($num,&wparam(4));	# get dl
-	&and($num,7);
-	&jz(&label("pw_end"));
-	    
-	for ($i=0; $i<7; $i++)
-	{
-	    &comment("dl>0 Tail Round $i");
-	    &mov($tmp1,&DWP($i*4,$a,"",0));	# *a
-	    &sub($tmp1,$c);
-	    &mov(&DWP($i*4,$r,"",0),$tmp1);	# *r
-	    &jnc(&label("pw_tail_nc".$i));
-	    &dec($num) if ($i != 6);
-	    &jz(&label("pw_end")) if ($i != 6);
-	}
-	&mov($c,1);
-	&jmp(&label("pw_end"));
-
-	&set_label("pw_nc_loop",0);
-	for ($i=0; $i<8; $i++)
-	{
-	    &mov($tmp1,&DWP($i*4,$a,"",0));	# *a
-	    &mov(&DWP($i*4,$r,"",0),$tmp1);	# *r
-	    &set_label("pw_nc".$i,0);
-	}
-	    
-	&comment("");
-	&add($a,32);
-	&add($r,32);
-	&sub($num,8);
-	&jnz(&label("pw_nc_loop"));
-	    
-	&mov($num,&wparam(4));	# get dl
-	&and($num,7);
-	&jz(&label("pw_nc_end"));
-	    
-	for ($i=0; $i<7; $i++)
-	{
-	    &mov($tmp1,&DWP($i*4,$a,"",0));	# *a
-	    &mov(&DWP($i*4,$r,"",0),$tmp1);	# *r
-	    &set_label("pw_tail_nc".$i,0);
-	    &dec($num) if ($i != 6);
-	    &jz(&label("pw_nc_end")) if ($i != 6);
-	}
-
-	&set_label("pw_nc_end",0);
-	&mov($c,0);
-
-	&set_label("pw_end",0);
-
-#	&mov("eax",$c);		# $c is "eax"
-
-	&function_end($name);
-	}
-
-- 
cgit v1.2.3-55-g6feb