Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/boringssl/crypto/perlasm/arm-xlate.pl

@@ -0,0 +1,172 @@
+#!/usr/bin/env perl
+
+# ARM assembler distiller by <appro>.
+
+my $flavour = shift;
+my $output = shift;
+open STDOUT,">$output" || die "can't open $output: $!";
+
+$flavour = "linux32" if (!$flavour or $flavour eq "void");
+
+my %GLOBALS;
+my $dotinlocallabels=($flavour=~/linux/)?1:0;
+
+################################################################
+# directives which need special treatment on different platforms
+################################################################
+my $arch = sub {
+    if ($flavour =~ /linux/)	{ ".arch\t".join(',',@_); }
+    else			{ ""; }
+};
+my $fpu = sub {
+    if ($flavour =~ /linux/)	{ ".fpu\t".join(',',@_); }
+    else			{ ""; }
+};
+my $hidden = sub {
+    if ($flavour =~ /ios/)	{ ".private_extern\t".join(',',@_); }
+    else			{ ".hidden\t".join(',',@_); }
+};
+my $comm = sub {
+    my @args = split(/,\s*/,shift);
+    my $name = @args[0];
+    my $global = \$GLOBALS{$name};
+    my $ret;
+
+    if ($flavour =~ /ios32/)	{
+	$ret = ".comm\t_$name,@args[1]\n";
+	$ret .= ".non_lazy_symbol_pointer\n";
+	$ret .= "$name:\n";
+	$ret .= ".indirect_symbol\t_$name\n";
+	$ret .= ".long\t0";
+	$name = "_$name";
+    } else			{ $ret = ".comm\t".join(',',@args); }
+
+    $$global = $name;
+    $ret;
+};
+my $globl = sub {
+    my $name = shift;
+    my $global = \$GLOBALS{$name};
+    my $ret;
+
+    SWITCH: for ($flavour) {
+	/ios/		&& do { $name = "_$name";
+				last;
+			      };
+    }
+
+    $ret = ".globl	$name\n";
+    # All symbols in assembly files are hidden.
+    $ret .= &$hidden($name);
+    $$global = $name;
+    $ret;
+};
+my $global = $globl;
+my $extern = sub {
+    &$globl(@_);
+    return;	# return nothing
+};
+my $type = sub {
+    if ($flavour =~ /linux/)	{ ".type\t".join(',',@_); }
+    else			{ ""; }
+};
+my $size = sub {
+    if ($flavour =~ /linux/)	{ ".size\t".join(',',@_); }
+    else			{ ""; }
+};
+my $inst = sub {
+    if ($flavour =~ /linux/)    { ".inst\t".join(',',@_); }
+    else                        { ".long\t".join(',',@_); }
+};
+my $asciz = sub {
+    my $line = join(",",@_);
+    if ($line =~ /^"(.*)"$/)
+    {	".byte	" . join(",",unpack("C*",$1),0) . "\n.align	2";	}
+    else
+    {	"";	}
+};
+
+sub range {
+  my ($r,$sfx,$start,$end) = @_;
+
+    join(",",map("$r$_$sfx",($start..$end)));
+}
+
+sub expand_line {
+  my $line = shift;
+  my @ret = ();
+
+    pos($line)=0;
+
+    while ($line =~ m/\G[^@\/\{\"]*/g) {
+	if ($line =~ m/\G(@|\/\/|$)/gc) {
+	    last;
+	}
+	elsif ($line =~ m/\G\{/gc) {
+	    my $saved_pos = pos($line);
+	    $line =~ s/\G([rdqv])([0-9]+)([^\-]*)\-\1([0-9]+)\3/range($1,$3,$2,$4)/e;
+	    pos($line) = $saved_pos;
+	    $line =~ m/\G[^\}]*\}/g;
+	}
+	elsif ($line =~ m/\G\"/gc) {
+	    $line =~ m/\G[^\"]*\"/g;
+	}
+    }
+
+    $line =~ s/\b(\w+)/$GLOBALS{$1} or $1/ge;
+
+    return $line;
+}
+
+print "#if defined(__arm__)\n" if ($flavour eq "linux32");
+print "#if defined(__aarch64__)\n" if ($flavour eq "linux64");
+
+while($line=<>) {
+
+    if ($line =~ m/^\s*(#|@|\/\/)/)	{ print $line; next; }
+
+    $line =~ s|/\*.*\*/||;	# get rid of C-style comments...
+    $line =~ s|^\s+||;		# ... and skip white spaces in beginning...
+    $line =~ s|\s+$||;		# ... and at the end
+
+    {
+	$line =~ s|[\b\.]L(\w{2,})|L$1|g;	# common denominator for Locallabel
+	$line =~ s|\bL(\w{2,})|\.L$1|g	if ($dotinlocallabels);
+    }
+
+    {
+	$line =~ s|(^[\.\w]+)\:\s*||;
+	my $label = $1;
+	if ($label) {
+	    printf "%s:",($GLOBALS{$label} or $label);
+	}
+    }
+
+    if ($line !~ m/^[#@]/) {
+	$line =~ s|^\s*(\.?)(\S+)\s*||;
+	my $c = $1; $c = "\t" if ($c eq "");
+	my $mnemonic = $2;
+	my $opcode;
+	if ($mnemonic =~ m/([^\.]+)\.([^\.]+)/) {
+	    $opcode = eval("\$$1_$2");
+	} else {
+	    $opcode = eval("\$$mnemonic");
+	}
+
+	my $arg=expand_line($line);
+
+	if (ref($opcode) eq 'CODE') {
+		$line = &$opcode($arg);
+	} elsif ($mnemonic)         {
+		$line = $c.$mnemonic;
+		$line.= "\t$arg" if ($arg ne "");
+	}
+    }
+
+    print $line if ($line);
+    print "\n";
+}
+
+print "#endif\n" if ($flavour eq "linux32" || $flavour eq "linux64");
+
+close STDOUT;