xref: /linux/arch/powerpc/crypto/ppc-xlate.pl (revision 8e07e0e3964ca4e23ce7b68e2096fe660a888942) 
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3
4# PowerPC assembler distiller by <appro>.
5
6my $flavour = shift;
7my $output = shift;
8open STDOUT,">$output" || die "can't open $output: $!";
9
10my %GLOBALS;
11my $dotinlocallabels=($flavour=~/linux/)?1:0;
12
13################################################################
14# directives which need special treatment on different platforms
15################################################################
16my $globl = sub {
17    my $junk = shift;
18    my $name = shift;
19    my $global = \$GLOBALS{$name};
20    my $ret;
21
22    $name =~ s|^[\.\_]||;
23
24    SWITCH: for ($flavour) {
25	/aix/		&& do { $name = ".$name";
26				last;
27			      };
28	/osx/		&& do { $name = "_$name";
29				last;
30			      };
31	/linux/
32			&& do {	$ret = "_GLOBAL($name)";
33				last;
34			      };
35    }
36
37    $ret = ".globl	$name\nalign 5\n$name:" if (!$ret);
38    $$global = $name;
39    $ret;
40};
41my $text = sub {
42    my $ret = ($flavour =~ /aix/) ? ".csect\t.text[PR],7" : ".text";
43    $ret = ".abiversion	2\n".$ret	if ($flavour =~ /linux.*64le/);
44    $ret;
45};
46my $machine = sub {
47    my $junk = shift;
48    my $arch = shift;
49    if ($flavour =~ /osx/)
50    {	$arch =~ s/\"//g;
51	$arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any");
52    }
53    ".machine	$arch";
54};
55my $size = sub {
56    if ($flavour =~ /linux/)
57    {	shift;
58	my $name = shift; $name =~ s|^[\.\_]||;
59	my $ret  = ".size	$name,.-".($flavour=~/64$/?".":"").$name;
60	$ret .= "\n.size	.$name,.-.$name" if ($flavour=~/64$/);
61	$ret;
62    }
63    else
64    {	"";	}
65};
66my $asciz = sub {
67    shift;
68    my $line = join(",",@_);
69    if ($line =~ /^"(.*)"$/)
70    {	".byte	" . join(",",unpack("C*",$1),0) . "\n.align	2";	}
71    else
72    {	"";	}
73};
74my $quad = sub {
75    shift;
76    my @ret;
77    my ($hi,$lo);
78    for (@_) {
79	if (/^0x([0-9a-f]*?)([0-9a-f]{1,8})$/io)
80	{  $hi=$1?"0x$1":"0"; $lo="0x$2";  }
81	elsif (/^([0-9]+)$/o)
82	{  $hi=$1>>32; $lo=$1&0xffffffff;  } # error-prone with 32-bit perl
83	else
84	{  $hi=undef; $lo=$_; }
85
86	if (defined($hi))
87	{  push(@ret,$flavour=~/le$/o?".long\t$lo,$hi":".long\t$hi,$lo");  }
88	else
89	{  push(@ret,".quad	$lo");  }
90    }
91    join("\n",@ret);
92};
93
94################################################################
95# simplified mnemonics not handled by at least one assembler
96################################################################
97my $cmplw = sub {
98    my $f = shift;
99    my $cr = 0; $cr = shift if ($#_>1);
100    # Some out-of-date 32-bit GNU assembler just can't handle cmplw...
101    ($flavour =~ /linux.*32/) ?
102	"	.long	".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 :
103	"	cmplw	".join(',',$cr,@_);
104};
105my $bdnz = sub {
106    my $f = shift;
107    my $bo = $f=~/[\+\-]/ ? 16+9 : 16;	# optional "to be taken" hint
108    "	bc	$bo,0,".shift;
109} if ($flavour!~/linux/);
110my $bltlr = sub {
111    my $f = shift;
112    my $bo = $f=~/\-/ ? 12+2 : 12;	# optional "not to be taken" hint
113    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
114	"	.long	".sprintf "0x%x",19<<26|$bo<<21|16<<1 :
115	"	bclr	$bo,0";
116};
117my $bnelr = sub {
118    my $f = shift;
119    my $bo = $f=~/\-/ ? 4+2 : 4;	# optional "not to be taken" hint
120    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
121	"	.long	".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 :
122	"	bclr	$bo,2";
123};
124my $beqlr = sub {
125    my $f = shift;
126    my $bo = $f=~/-/ ? 12+2 : 12;	# optional "not to be taken" hint
127    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
128	"	.long	".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 :
129	"	bclr	$bo,2";
130};
131# GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two
132# arguments is 64, with "operand out of range" error.
133my $extrdi = sub {
134    my ($f,$ra,$rs,$n,$b) = @_;
135    $b = ($b+$n)&63; $n = 64-$n;
136    "	rldicl	$ra,$rs,$b,$n";
137};
138my $vmr = sub {
139    my ($f,$vx,$vy) = @_;
140    "	vor	$vx,$vy,$vy";
141};
142
143# Some ABIs specify vrsave, special-purpose register #256, as reserved
144# for system use.
145my $no_vrsave = ($flavour =~ /linux-ppc64le/);
146my $mtspr = sub {
147    my ($f,$idx,$ra) = @_;
148    if ($idx == 256 && $no_vrsave) {
149	"	or	$ra,$ra,$ra";
150    } else {
151	"	mtspr	$idx,$ra";
152    }
153};
154my $mfspr = sub {
155    my ($f,$rd,$idx) = @_;
156    if ($idx == 256 && $no_vrsave) {
157	"	li	$rd,-1";
158    } else {
159	"	mfspr	$rd,$idx";
160    }
161};
162
163# PowerISA 2.06 stuff
164sub vsxmem_op {
165    my ($f, $vrt, $ra, $rb, $op) = @_;
166    "	.long	".sprintf "0x%X",(31<<26)|($vrt<<21)|($ra<<16)|($rb<<11)|($op*2+1);
167}
168# made-up unaligned memory reference AltiVec/VMX instructions
169my $lvx_u	= sub {	vsxmem_op(@_, 844); };	# lxvd2x
170my $stvx_u	= sub {	vsxmem_op(@_, 972); };	# stxvd2x
171my $lvdx_u	= sub {	vsxmem_op(@_, 588); };	# lxsdx
172my $stvdx_u	= sub {	vsxmem_op(@_, 716); };	# stxsdx
173my $lvx_4w	= sub { vsxmem_op(@_, 780); };	# lxvw4x
174my $stvx_4w	= sub { vsxmem_op(@_, 908); };	# stxvw4x
175
176# PowerISA 2.07 stuff
177sub vcrypto_op {
178    my ($f, $vrt, $vra, $vrb, $op) = @_;
179    "	.long	".sprintf "0x%X",(4<<26)|($vrt<<21)|($vra<<16)|($vrb<<11)|$op;
180}
181my $vcipher	= sub { vcrypto_op(@_, 1288); };
182my $vcipherlast	= sub { vcrypto_op(@_, 1289); };
183my $vncipher	= sub { vcrypto_op(@_, 1352); };
184my $vncipherlast= sub { vcrypto_op(@_, 1353); };
185my $vsbox	= sub { vcrypto_op(@_, 0, 1480); };
186my $vshasigmad	= sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1730); };
187my $vshasigmaw	= sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1666); };
188my $vpmsumb	= sub { vcrypto_op(@_, 1032); };
189my $vpmsumd	= sub { vcrypto_op(@_, 1224); };
190my $vpmsubh	= sub { vcrypto_op(@_, 1096); };
191my $vpmsumw	= sub { vcrypto_op(@_, 1160); };
192my $vaddudm	= sub { vcrypto_op(@_, 192);  };
193my $vadduqm	= sub { vcrypto_op(@_, 256);  };
194
195my $mtsle	= sub {
196    my ($f, $arg) = @_;
197    "	.long	".sprintf "0x%X",(31<<26)|($arg<<21)|(147*2);
198};
199
200print "#include <asm/ppc_asm.h>\n" if $flavour =~ /linux/;
201
202while($line=<>) {
203
204    $line =~ s|[#!;].*$||;	# get rid of asm-style comments...
205    $line =~ s|/\*.*\*/||;	# ... and C-style comments...
206    $line =~ s|^\s+||;		# ... and skip white spaces in beginning...
207    $line =~ s|\s+$||;		# ... and at the end
208
209    {
210	$line =~ s|\b\.L(\w+)|L$1|g;	# common denominator for Locallabel
211	$line =~ s|\bL(\w+)|\.L$1|g	if ($dotinlocallabels);
212    }
213
214    {
215	$line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||;
216	my $c = $1; $c = "\t" if ($c eq "");
217	my $mnemonic = $2;
218	my $f = $3;
219	my $opcode = eval("\$$mnemonic");
220	$line =~ s/\b(c?[rf]|v|vs)([0-9]+)\b/$2/g if ($c ne "." and $flavour !~ /osx/);
221	if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); }
222	elsif ($mnemonic)           { $line = $c.$mnemonic.$f."\t".$line; }
223    }
224
225    print $line if ($line);
226    print "\n";
227}
228
229close STDOUT;
230