OpenSSL 0.9.4 merge

6 files changed, 828 insertions, 15 deletions

diff --git a/lib/libssl/src/crypto/perlasm/alpha.pl b/lib/libssl/src/crypto/perlasm/alpha.pl
new file mode 100644
index 00000000000..3dac571743c
--- /dev/null
+++ b/lib/libssl/src/crypto/perlasm/alpha.pl
@@ -0,0 +1,434 @@
+#!/usr/local/bin/perl
+
+package alpha;
+use Carp qw(croak cluck);
+
+$label="100";
+
+$n_debug=0;
+$smear_regs=1;
+$reg_alloc=1;
+
+$align="3";
+$com_start="#";
+
+sub main'asm_init_output { @out=(); }
+sub main'asm_get_output { return(@out); }
+sub main'get_labels { return(@labels); }
+sub main'external_label { push(@labels,@_); }
+
+# General registers
+
+%regs=(	'r0',	'$0',
+	'r1',	'$1',
+	'r2',	'$2',
+	'r3',	'$3',
+	'r4',	'$4',
+	'r5',	'$5',
+	'r6',	'$6',
+	'r7',	'$7',
+	'r8',	'$8',
+	'r9',	'$22',
+	'r10',	'$23',
+	'r11',	'$24',
+	'r12',	'$25',
+	'r13',	'$27',
+	'r14',	'$28',
+	'r15',	'$21', # argc == 5
+	'r16',	'$20', # argc == 4
+	'r17',	'$19', # argc == 3
+	'r18',	'$18', # argc == 2
+	'r19',	'$17', # argc == 1
+	'r20',	'$16', # argc == 0
+	'r21',	'$9',  # save 0
+	'r22',	'$10', # save 1
+	'r23',	'$11', # save 2
+	'r24',	'$12', # save 3
+	'r25',	'$13', # save 4
+	'r26',	'$14', # save 5
+
+	'a0',	'$16',
+	'a1',	'$17',
+	'a2',	'$18',
+	'a3',	'$19',
+	'a4',	'$20',
+	'a5',	'$21',
+
+	's0',	'$9',
+	's1',	'$10',
+	's2',	'$11',
+	's3',	'$12',
+	's4',	'$13',
+	's5',	'$14',
+	'zero',	'$31',
+	'sp',	'$30',
+	);
+
+$main'reg_s0="r21";
+$main'reg_s1="r22";
+$main'reg_s2="r23";
+$main'reg_s3="r24";
+$main'reg_s4="r25";
+$main'reg_s5="r26";
+
+@reg=(  '$0', '$1' ,'$2' ,'$3' ,'$4' ,'$5' ,'$6' ,'$7' ,'$8',
+	'$22','$23','$24','$25','$20','$21','$27','$28');
+
+
+sub main'sub	{ &out3("subq",@_); }
+sub main'add	{ &out3("addq",@_); }
+sub main'mov	{ &out3("bis",$_[0],$_[0],$_[1]); }
+sub main'or	{ &out3("bis",@_); }
+sub main'bis	{ &out3("bis",@_); }
+sub main'br	{ &out1("br",@_); }
+sub main'ld	{ &out2("ldq",@_); }
+sub main'st	{ &out2("stq",@_); }
+sub main'cmpult	{ &out3("cmpult",@_); }
+sub main'cmplt	{ &out3("cmplt",@_); }
+sub main'bgt	{ &out2("bgt",@_); }
+sub main'ble	{ &out2("ble",@_); }
+sub main'blt	{ &out2("blt",@_); }
+sub main'mul	{ &out3("mulq",@_); }
+sub main'muh	{ &out3("umulh",@_); }
+
+$main'QWS=8;
+
+sub main'asm_add
+	{
+	push(@out,@_);
+	}
+
+sub main'asm_finish
+	{
+	&main'file_end();
+	print &main'asm_get_output();
+	}
+
+sub main'asm_init
+	{
+	($type,$fn)=@_;
+	$filename=$fn;
+
+	&main'asm_init_output();
+	&main'comment("Don't even think of reading this code");
+	&main'comment("It was automatically generated by $filename");
+	&main'comment("Which is a perl program used to generate the alpha assember.");
+	&main'comment("eric <eay\@cryptsoft.com>");
+	&main'comment("");
+
+	$filename =~ s/\.pl$//;
+	&main'file($filename);
+	}
+
+sub conv
+	{
+	local($r)=@_;
+	local($v);
+
+	return($regs{$r}) if defined($regs{$r});
+	return($r);
+	}
+
+sub main'QWPw
+	{
+	local($off,$reg)=@_;
+
+	return(&main'QWP($off*8,$reg));
+	}
+
+sub main'QWP
+	{
+	local($off,$reg)=@_;
+
+	$ret="$off(".&conv($reg).")";
+	return($ret);
+	}
+
+sub out3
+	{
+	local($name,$p1,$p2,$p3)=@_;
+
+	$p1=&conv($p1);
+	$p2=&conv($p2);
+	$p3=&conv($p3);
+	push(@out,"\t$name\t");
+	$l=length($p1)+1;
+	push(@out,$p1.",");
+	$ll=3-($l+9)/8;
+	$tmp1=sprintf("\t" x $ll);
+	push(@out,$tmp1);
+
+	$l=length($p2)+1;
+	push(@out,$p2.",");
+	$ll=3-($l+9)/8;
+	$tmp1=sprintf("\t" x $ll);
+	push(@out,$tmp1);
+
+	push(@out,&conv($p3)."\n");
+	}
+
+sub out2
+	{
+	local($name,$p1,$p2,$p3)=@_;
+
+	$p1=&conv($p1);
+	$p2=&conv($p2);
+	push(@out,"\t$name\t");
+	$l=length($p1)+1;
+	push(@out,$p1.",");
+	$ll=3-($l+9)/8;
+	$tmp1=sprintf("\t" x $ll);
+	push(@out,$tmp1);
+
+	push(@out,&conv($p2)."\n");
+	}
+
+sub out1
+	{
+	local($name,$p1)=@_;
+
+	$p1=&conv($p1);
+	push(@out,"\t$name\t".$p1."\n");
+	}
+
+sub out0
+	{
+	push(@out,"\t$_[0]\n");
+	}
+
+sub main'file
+	{
+	local($file)=@_;
+
+	local($tmp)=<<"EOF";
+ # DEC Alpha assember
+ # Generated from perl scripts contains in SSLeay
+	.file	1 "$file.s"
+	.set noat
+EOF
+	push(@out,$tmp);
+	}
+
+sub main'function_begin
+	{
+	local($func)=@_;
+
+print STDERR "$func\n";
+	local($tmp)=<<"EOF";
+	.text
+	.align $align
+	.globl $func
+	.ent $func
+${func}:
+${func}..ng:
+	.frame \$30,0,\$26,0
+	.prologue 0
+EOF
+	push(@out,$tmp);
+	$stack=0;
+	}
+
+sub main'function_end
+	{
+	local($func)=@_;
+
+	local($tmp)=<<"EOF";
+	ret	\$31,(\$26),1
+	.end $func
+EOF
+	push(@out,$tmp);
+	$stack=0;
+	%label=();
+	}
+
+sub main'function_end_A
+	{
+	local($func)=@_;
+
+	local($tmp)=<<"EOF";
+	ret	\$31,(\$26),1
+EOF
+	push(@out,$tmp);
+	}
+
+sub main'function_end_B
+	{
+	local($func)=@_;
+
+	$func=$under.$func;
+
+	push(@out,"\t.end $func\n");
+	$stack=0;
+	%label=();
+	}
+
+sub main'wparam
+	{
+	local($num)=@_;
+
+	if ($num < 6)
+		{
+		$num=20-$num;
+		return("r$num");
+		}
+	else
+		{ return(&main'QWP($stack+$num*8,"sp")); }
+	}
+
+sub main'stack_push
+	{
+	local($num)=@_;
+	$stack+=$num*8;
+	&main'sub("sp",$num*8,"sp");
+	}
+
+sub main'stack_pop
+	{
+	local($num)=@_;
+	$stack-=$num*8;
+	&main'add("sp",$num*8,"sp");
+	}
+
+sub main'swtmp
+	{
+	return(&main'QWP(($_[0])*8,"sp"));
+	}
+
+# Should use swtmp, which is above sp.  Linix can trash the stack above esp
+#sub main'wtmp
+#	{
+#	local($num)=@_;
+#
+#	return(&main'QWP(-($num+1)*4,"esp","",0));
+#	}
+
+sub main'comment
+	{
+	foreach (@_)
+		{
+		if (/^\s*$/)
+			{ push(@out,"\n"); }
+		else
+			{ push(@out,"\t$com_start $_ $com_end\n"); }
+		}
+	}
+
+sub main'label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}=$label;
+		$label++;
+		}
+	return('$'.$label{$_[0]});
+	}
+
+sub main'set_label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}=$label;
+		$label++;
+		}
+#	push(@out,".align $align\n") if ($_[1] != 0);
+	push(@out,'$'."$label{$_[0]}:\n");
+	}
+
+sub main'file_end
+	{
+	}
+
+sub main'data_word
+	{
+	push(@out,"\t.long $_[0]\n");
+	}
+
+@pool_free=();
+@pool_taken=();
+$curr_num=0;
+$max=0;
+
+sub main'init_pool
+	{
+	local($args)=@_;
+	local($i);
+
+	@pool_free=();
+	for ($i=(14+(6-$args)); $i >= 0; $i--)
+		{
+		push(@pool_free,"r$i");
+		}
+	print STDERR "START :register pool:@pool_free\n";
+	$curr_num=$max=0;
+	}
+
+sub main'fin_pool
+	{
+	printf STDERR "END %2d:register pool:@pool_free\n",$max;
+	}
+
+sub main'GR
+	{
+	local($r)=@_;
+	local($i,@n,$_);
+
+	foreach (@pool_free)
+		{
+		if ($r ne $_)
+			{ push(@n,$_); }
+		else
+			{
+			$curr_num++;
+			$max=$curr_num if ($curr_num > $max);
+			}
+		}
+	@pool_free=@n;
+print STDERR "GR:@pool_free\n" if $reg_alloc;
+	return(@_);
+	}
+
+sub main'NR
+	{
+	local($num)=@_;
+	local(@ret);
+
+	$num=1 if $num == 0;
+	($#pool_free >= ($num-1)) || croak "out of registers: want $num, have @pool_free";
+	while ($num > 0)
+		{
+		push(@ret,pop @pool_free);
+		$curr_num++;
+		$max=$curr_num if ($curr_num > $max);
+		$num--
+		}
+	print STDERR "nr @ret\n" if $n_debug;
+print STDERR "NR:@pool_free\n" if $reg_alloc;
+	return(@ret);
+
+	}
+
+sub main'FR
+	{
+	local(@r)=@_;
+	local(@a,$v,$w);
+
+	print STDERR "fr @r\n" if $n_debug;
+#	cluck "fr @r";
+	for $w (@pool_free)
+		{
+		foreach $v (@r)
+			{
+			croak "double register free of $v (@pool_free)" if $w eq $v;
+			}
+		}
+	foreach $v (@r)
+		{
+		croak "bad argument to FR" if ($v !~ /^r\d+$/);
+		if ($smear_regs)
+			{ unshift(@pool_free,$v); }
+		else	{ push(@pool_free,$v); }
+		$curr_num--;
+		}
+print STDERR "FR:@pool_free\n" if $reg_alloc;
+	}
+1;
diff --git a/lib/libssl/src/crypto/perlasm/cbc.pl b/lib/libssl/src/crypto/perlasm/cbc.pl
index 2789305790f..0145c4f0cc6 100644
--- a/lib/libssl/src/crypto/perlasm/cbc.pl
+++ b/lib/libssl/src/crypto/perlasm/cbc.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 # void des_ncbc_encrypt(input, output, length, schedule, ivec, enc)
 # des_cblock (*input);
diff --git a/lib/libssl/src/crypto/perlasm/x86asm.pl b/lib/libssl/src/crypto/perlasm/x86asm.pl
index 6a9156ae9a2..44e330eb8d1 100644
--- a/lib/libssl/src/crypto/perlasm/x86asm.pl
+++ b/lib/libssl/src/crypto/perlasm/x86asm.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 # require 'x86asm.pl';
 # &asm_init("cpp","des-586.pl");
@@ -15,7 +15,7 @@ sub main'asm_finish
 
 sub main'asm_init
 	{
-	($type,$fn)=@_;
+	($type,$fn,$i386)=@_;
 	$filename=$fn;
 
 	$cpp=$sol=$aout=$win32=0;
@@ -29,6 +29,8 @@ sub main'asm_init
 		{ $cpp=1; require "x86unix.pl"; }
 	elsif (	($type eq "win32"))
 		{ $win32=1; require "x86ms.pl"; }
+	elsif (	($type eq "win32n"))
+		{ $win32=1; require "x86nasm.pl"; }
 	else
 		{
 		print STDERR <<"EOF";
@@ -38,6 +40,7 @@ Pick one target type from
 	sol	- x86 solaris
 	cpp	- format so x86unix.cpp can be used
 	win32	- Windows 95/Windows NT
+	win32n	- Windows 95/Windows NT NASM format
 EOF
 		exit(1);
 		}
@@ -75,7 +78,7 @@ sub asm_finish_cpp
 #define TYPE(a,b)       .type   a,b
 #define SIZE(a,b)       .size   a,b
 
-#if defined(OUT) || defined(BSDI)
+#if defined(OUT) || (defined(BSDI) && !defined(ELF))
 $tmp
 #endif
 
@@ -84,7 +87,7 @@ $tmp
 #define ALIGN	4
 #endif
 
-#ifdef BSDI
+#if defined(BSDI) && !defined(ELF)
 #define OK              1
 #define ALIGN           4
 #undef SIZE
diff --git a/lib/libssl/src/crypto/perlasm/x86ms.pl b/lib/libssl/src/crypto/perlasm/x86ms.pl
index 893b50b1a46..51dcce067fa 100644
--- a/lib/libssl/src/crypto/perlasm/x86ms.pl
+++ b/lib/libssl/src/crypto/perlasm/x86ms.pl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/local/bin/perl
 
 package x86ms;
 
@@ -51,6 +51,16 @@ sub main'DWP
 	&get_mem("DWORD",@_);
 	}
 
+sub main'BC
+	{
+	return @_;
+	}
+
+sub main'DWC
+	{
+	return @_;
+	}
+
 sub main'stack_push
 	{
 	local($num)=@_;
diff --git a/lib/libssl/src/crypto/perlasm/x86nasm.pl b/lib/libssl/src/crypto/perlasm/x86nasm.pl
new file mode 100644
index 00000000000..b4da364bbfd
--- /dev/null
+++ b/lib/libssl/src/crypto/perlasm/x86nasm.pl
@@ -0,0 +1,342 @@
+#!/usr/local/bin/perl
+
+package x86nasm;
+
+$label="L000";
+
+%lb=(	'eax',	'al',
+	'ebx',	'bl',
+	'ecx',	'cl',
+	'edx',	'dl',
+	'ax',	'al',
+	'bx',	'bl',
+	'cx',	'cl',
+	'dx',	'dl',
+	);
+
+%hb=(	'eax',	'ah',
+	'ebx',	'bh',
+	'ecx',	'ch',
+	'edx',	'dh',
+	'ax',	'ah',
+	'bx',	'bh',
+	'cx',	'ch',
+	'dx',	'dh',
+	);
+
+sub main'asm_init_output { @out=(); }
+sub main'asm_get_output { return(@out); }
+sub main'get_labels { return(@labels); }
+
+sub main'external_label
+{
+	push(@labels,@_);
+	foreach (@_) {
+		push(@out, "extern\t_$_\n");
+	}
+}
+
+sub main'LB
+	{
+	(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
+	return($lb{$_[0]});
+	}
+
+sub main'HB
+	{
+	(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
+	return($hb{$_[0]});
+	}
+
+sub main'BP
+	{
+	&get_mem("BYTE",@_);
+	}
+
+sub main'DWP
+	{
+	&get_mem("DWORD",@_);
+	}
+
+sub main'BC
+	{
+	return "BYTE @_";
+	}
+
+sub main'DWC
+	{
+	return "DWORD @_";
+	}
+
+sub main'stack_push
+	{
+	my($num)=@_;
+	$stack+=$num*4;
+	&main'sub("esp",$num*4);
+	}
+
+sub main'stack_pop
+	{
+	my($num)=@_;
+	$stack-=$num*4;
+	&main'add("esp",$num*4);
+	}
+
+sub get_mem
+	{
+	my($size,$addr,$reg1,$reg2,$idx)=@_;
+	my($t,$post);
+	my($ret)="[";
+	$addr =~ s/^\s+//;
+	if ($addr =~ /^(.+)\+(.+)$/)
+		{
+		$reg2=&conv($1);
+		$addr="_$2";
+		}
+	elsif ($addr =~ /^[_a-zA-Z]/)
+		{
+		$addr="_$addr";
+		}
+
+	$reg1="$regs{$reg1}" if defined($regs{$reg1});
+	$reg2="$regs{$reg2}" if defined($regs{$reg2});
+	if (($addr ne "") && ($addr ne 0))
+		{
+		if ($addr !~ /^-/)
+			{ $ret.="${addr}+"; }
+		else	{ $post=$addr; }
+		}
+	if ($reg2 ne "")
+		{
+		$t="";
+		$t="*$idx" if ($idx != 0);
+		$reg1="+".$reg1 if ("$reg1$post" ne "");
+		$ret.="$reg2$t$reg1$post]";
+		}
+	else
+		{
+		$ret.="$reg1$post]"
+		}
+	return($ret);
+	}
+
+sub main'mov	{ &out2("mov",@_); }
+sub main'movb	{ &out2("mov",@_); }
+sub main'and	{ &out2("and",@_); }
+sub main'or	{ &out2("or",@_); }
+sub main'shl	{ &out2("shl",@_); }
+sub main'shr	{ &out2("shr",@_); }
+sub main'xor	{ &out2("xor",@_); }
+sub main'xorb	{ &out2("xor",@_); }
+sub main'add	{ &out2("add",@_); }
+sub main'adc	{ &out2("adc",@_); }
+sub main'sub	{ &out2("sub",@_); }
+sub main'rotl	{ &out2("rol",@_); }
+sub main'rotr	{ &out2("ror",@_); }
+sub main'exch	{ &out2("xchg",@_); }
+sub main'cmp	{ &out2("cmp",@_); }
+sub main'lea	{ &out2("lea",@_); }
+sub main'mul	{ &out1("mul",@_); }
+sub main'div	{ &out1("div",@_); }
+sub main'dec	{ &out1("dec",@_); }
+sub main'inc	{ &out1("inc",@_); }
+sub main'jmp	{ &out1("jmp",@_); }
+sub main'jmp_ptr { &out1p("jmp",@_); }
+
+# This is a bit of a kludge: declare all branches as NEAR.
+sub main'je	{ &out1("je NEAR",@_); }
+sub main'jle	{ &out1("jle NEAR",@_); }
+sub main'jz	{ &out1("jz NEAR",@_); }
+sub main'jge	{ &out1("jge NEAR",@_); }
+sub main'jl	{ &out1("jl NEAR",@_); }
+sub main'jb	{ &out1("jb NEAR",@_); }
+sub main'jc	{ &out1("jc NEAR",@_); }
+sub main'jnc	{ &out1("jnc NEAR",@_); }
+sub main'jnz	{ &out1("jnz NEAR",@_); }
+sub main'jne	{ &out1("jne NEAR",@_); }
+sub main'jno	{ &out1("jno NEAR",@_); }
+
+sub main'push	{ &out1("push",@_); $stack+=4; }
+sub main'pop	{ &out1("pop",@_); $stack-=4; }
+sub main'bswap	{ &out1("bswap",@_); &using486(); }
+sub main'not	{ &out1("not",@_); }
+sub main'call	{ &out1("call",'_'.$_[0]); }
+sub main'ret	{ &out0("ret"); }
+sub main'nop	{ &out0("nop"); }
+
+sub out2
+	{
+	my($name,$p1,$p2)=@_;
+	my($l,$t);
+
+	push(@out,"\t$name\t");
+	$t=&conv($p1).",";
+	$l=length($t);
+	push(@out,$t);
+	$l=4-($l+9)/8;
+	push(@out,"\t" x $l);
+	push(@out,&conv($p2));
+	push(@out,"\n");
+	}
+
+sub out0
+	{
+	my($name)=@_;
+
+	push(@out,"\t$name\n");
+	}
+
+sub out1
+	{
+	my($name,$p1)=@_;
+	my($l,$t);
+	push(@out,"\t$name\t".&conv($p1)."\n");
+	}
+
+sub conv
+	{
+	my($p)=@_;
+	$p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
+	return $p;
+	}
+
+sub using486
+	{
+	return if $using486;
+	$using486++;
+	grep(s/\.386/\.486/,@out);
+	}
+
+sub main'file
+	{
+	push(@out, "segment .text\n");
+	}
+
+sub main'function_begin
+	{
+	my($func,$extra)=@_;
+
+	push(@labels,$func);
+	my($tmp)=<<"EOF";
+global	_$func
+_$func:
+	push	ebp
+	push	ebx
+	push	esi
+	push	edi
+EOF
+	push(@out,$tmp);
+	$stack=20;
+	}
+
+sub main'function_begin_B
+	{
+	my($func,$extra)=@_;
+	my($tmp)=<<"EOF";
+global	_$func
+_$func:
+EOF
+	push(@out,$tmp);
+	$stack=4;
+	}
+
+sub main'function_end
+	{
+	my($func)=@_;
+
+	my($tmp)=<<"EOF";
+	pop	edi
+	pop	esi
+	pop	ebx
+	pop	ebp
+	ret
+EOF
+	push(@out,$tmp);
+	$stack=0;
+	%label=();
+	}
+
+sub main'function_end_B
+	{
+	$stack=0;
+	%label=();
+	}
+
+sub main'function_end_A
+	{
+	my($func)=@_;
+
+	my($tmp)=<<"EOF";
+	pop	edi
+	pop	esi
+	pop	ebx
+	pop	ebp
+	ret
+EOF
+	push(@out,$tmp);
+	}
+
+sub main'file_end
+	{
+	}
+
+sub main'wparam
+	{
+	my($num)=@_;
+
+	return(&main'DWP($stack+$num*4,"esp","",0));
+	}
+
+sub main'swtmp
+	{
+	return(&main'DWP($_[0]*4,"esp","",0));
+	}
+
+# Should use swtmp, which is above esp.  Linix can trash the stack above esp
+#sub main'wtmp
+#	{
+#	my($num)=@_;
+#
+#	return(&main'DWP(-(($num+1)*4),"esp","",0));
+#	}
+
+sub main'comment
+	{
+	foreach (@_)
+		{
+		push(@out,"\t; $_\n");
+		}
+	}
+
+sub main'label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}="\$${label}${_[0]}";
+		$label++;
+		}
+	return($label{$_[0]});
+	}
+
+sub main'set_label
+	{
+	if (!defined($label{$_[0]}))
+		{
+		$label{$_[0]}="${label}${_[0]}";
+		$label++;
+		}
+	push(@out,"$label{$_[0]}:\n");
+	}
+
+sub main'data_word
+	{
+	push(@out,"\tDD\t$_[0]\n");
+	}
+
+sub out1p
+	{
+	my($name,$p1)=@_;
+	my($l,$t);
+
+	push(@out,"\t$name\t ".&conv($p1)."\n");
+	}
diff --git a/lib/libssl/src/crypto/perlasm/x86unix.pl b/lib/libssl/src/crypto/perlasm/x86unix.pl
index 6ee4dd32455..8c456b14aff 100644
--- a/lib/libssl/src/crypto/perlasm/x86unix.pl
+++ b/lib/libssl/src/crypto/perlasm/x86unix.pl
@@ -1,10 +1,4 @@
-#!/usr/bin/perl
-
-# Because the bswapl instruction is not supported for old assembers
-# (it was a new instruction for the 486), I've added .byte xxxx code
-# to put it in.
-# eric 24-Apr-1998
-#
+#!/usr/local/bin/perl
 
 package x86unix;
 
@@ -90,7 +84,12 @@ sub main'DWP
 	$reg2="$regs{$reg2}" if defined($regs{$reg2});
 	$ret.=$addr if ($addr ne "") && ($addr ne 0);
 	if ($reg2 ne "")
-		{ $ret.="($reg1,$reg2,$idx)"; }
+		{
+		if($idx ne "")
+		    { $ret.="($reg1,$reg2,$idx)"; }
+		else
+		    { $ret.="($reg1,$reg2)"; }
+	        }
 	else
 		{ $ret.="($reg1)" }
 	return($ret);
@@ -101,6 +100,16 @@ sub main'BP
 	return(&main'DWP(@_));
 	}
 
+sub main'BC
+	{
+	return @_;
+	}
+
+sub main'DWC
+	{
+	return @_;
+	}
+
 #sub main'BP
 #	{
 #	local($addr,$reg1,$reg2,$idx)=@_;
@@ -153,12 +162,27 @@ sub main'dec	{ &out1("decl",@_); }
 sub main'inc	{ &out1("incl",@_); }
 sub main'push	{ &out1("pushl",@_); $stack+=4; }
 sub main'pop	{ &out1("popl",@_); $stack-=4; }
-sub main'bswap	{ &out1("bswapl",@_); }
 sub main'not	{ &out1("notl",@_); }
 sub main'call	{ &out1("call",$under.$_[0]); }
 sub main'ret	{ &out0("ret"); }
 sub main'nop	{ &out0("nop"); }
 
+# The bswapl instruction is new for the 486. Emulate if i386.
+sub main'bswap
+	{
+	if ($main'i386)
+		{
+		&main'comment("bswapl @_");
+		&main'exch(main'HB(@_),main'LB(@_));
+		&main'rotr(@_,16);
+		&main'exch(main'HB(@_),main'LB(@_));
+		}
+	else
+		{
+		&out1("bswapl",@_);
+		}
+	}
+
 sub out2
 	{
 	local($name,$p1,$p2)=@_;