xref: /openbmc/linux/drivers/crypto/vmx/ppc-xlate.pl (revision 8ffd3d5e) 
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;
12my $elfv2abi=(($flavour =~ /linux-ppc64le/) or ($flavour =~ /linux-ppc64-elfv2/))?1:0;
13my $dotfunctions=($elfv2abi=~1)?0:1;
14
15################################################################
16# directives which need special treatment on different platforms
17################################################################
18my $globl = sub {
19    my $junk = shift;
20    my $name = shift;
21    my $global = \$GLOBALS{$name};
22    my $ret;
23
24    $name =~ s|^[\.\_]||;
25
26    SWITCH: for ($flavour) {
27	/aix/		&& do { $name = ".$name";
28				last;
29			      };
30	/osx/		&& do { $name = "_$name";
31				last;
32			      };
33	/linux/
34			&& do {	$ret = "_GLOBAL($name)";
35				last;
36			      };
37    }
38
39    $ret = ".globl	$name\nalign 5\n$name:" if (!$ret);
40    $$global = $name;
41    $ret;
42};
43my $text = sub {
44    my $ret = ($flavour =~ /aix/) ? ".csect\t.text[PR],7" : ".text";
45    $ret = ".abiversion	2\n".$ret	if ($elfv2abi);
46    $ret;
47};
48my $machine = sub {
49    my $junk = shift;
50    my $arch = shift;
51    if ($flavour =~ /osx/)
52    {	$arch =~ s/\"//g;
53	$arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any");
54    }
55    ".machine	$arch";
56};
57my $size = sub {
58    if ($flavour =~ /linux/)
59    {	shift;
60	my $name = shift; $name =~ s|^[\.\_]||;
61	my $ret  = ".size	$name,.-".($dotfunctions?".":"").$name;
62	$ret .= "\n.size	.$name,.-.$name" if ($dotfunctions);
63	$ret;
64    }
65    else
66    {	"";	}
67};
68my $asciz = sub {
69    shift;
70    my $line = join(",",@_);
71    if ($line =~ /^"(.*)"$/)
72    {	".byte	" . join(",",unpack("C*",$1),0) . "\n.align	2";	}
73    else
74    {	"";	}
75};
76my $quad = sub {
77    shift;
78    my @ret;
79    my ($hi,$lo);
80    for (@_) {
81	if (/^0x([0-9a-f]*?)([0-9a-f]{1,8})$/io)
82	{  $hi=$1?"0x$1":"0"; $lo="0x$2";  }
83	elsif (/^([0-9]+)$/o)
84	{  $hi=$1>>32; $lo=$1&0xffffffff;  } # error-prone with 32-bit perl
85	else
86	{  $hi=undef; $lo=$_; }
87
88	if (defined($hi))
89	{  push(@ret,$flavour=~/le$/o?".long\t$lo,$hi":".long\t$hi,$lo");  }
90	else
91	{  push(@ret,".quad	$lo");  }
92    }
93    join("\n",@ret);
94};
95
96################################################################
97# simplified mnemonics not handled by at least one assembler
98################################################################
99my $cmplw = sub {
100    my $f = shift;
101    my $cr = 0; $cr = shift if ($#_>1);
102    # Some out-of-date 32-bit GNU assembler just can't handle cmplw...
103    ($flavour =~ /linux.*32/) ?
104	"	.long	".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 :
105	"	cmplw	".join(',',$cr,@_);
106};
107my $bdnz = sub {
108    my $f = shift;
109    my $bo = $f=~/[\+\-]/ ? 16+9 : 16;	# optional "to be taken" hint
110    "	bc	$bo,0,".shift;
111} if ($flavour!~/linux/);
112my $bltlr = sub {
113    my $f = shift;
114    my $bo = $f=~/\-/ ? 12+2 : 12;	# optional "not to be taken" hint
115    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
116	"	.long	".sprintf "0x%x",19<<26|$bo<<21|16<<1 :
117	"	bclr	$bo,0";
118};
119my $bnelr = sub {
120    my $f = shift;
121    my $bo = $f=~/\-/ ? 4+2 : 4;	# optional "not to be taken" hint
122    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
123	"	.long	".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 :
124	"	bclr	$bo,2";
125};
126my $beqlr = sub {
127    my $f = shift;
128    my $bo = $f=~/-/ ? 12+2 : 12;	# optional "not to be taken" hint
129    ($flavour =~ /linux/) ?		# GNU as doesn't allow most recent hints
130	"	.long	".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 :
131	"	bclr	$bo,2";
132};
133# GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two
134# arguments is 64, with "operand out of range" error.
135my $extrdi = sub {
136    my ($f,$ra,$rs,$n,$b) = @_;
137    $b = ($b+$n)&63; $n = 64-$n;
138    "	rldicl	$ra,$rs,$b,$n";
139};
140my $vmr = sub {
141    my ($f,$vx,$vy) = @_;
142    "	vor	$vx,$vy,$vy";
143};
144
145# Some ABIs specify vrsave, special-purpose register #256, as reserved
146# for system use.
147my $no_vrsave = ($elfv2abi);
148my $mtspr = sub {
149    my ($f,$idx,$ra) = @_;
150    if ($idx == 256 && $no_vrsave) {
151	"	or	$ra,$ra,$ra";
152    } else {
153	"	mtspr	$idx,$ra";
154    }
155};
156my $mfspr = sub {
157    my ($f,$rd,$idx) = @_;
158    if ($idx == 256 && $no_vrsave) {
159	"	li	$rd,-1";
160    } else {
161	"	mfspr	$rd,$idx";
162    }
163};
164
165# PowerISA 2.06 stuff
166sub vsxmem_op {
167    my ($f, $vrt, $ra, $rb, $op) = @_;
168    "	.long	".sprintf "0x%X",(31<<26)|($vrt<<21)|($ra<<16)|($rb<<11)|($op*2+1);
169}
170# made-up unaligned memory reference AltiVec/VMX instructions
171my $lvx_u	= sub {	vsxmem_op(@_, 844); };	# lxvd2x
172my $stvx_u	= sub {	vsxmem_op(@_, 972); };	# stxvd2x
173my $lvdx_u	= sub {	vsxmem_op(@_, 588); };	# lxsdx
174my $stvdx_u	= sub {	vsxmem_op(@_, 716); };	# stxsdx
175my $lvx_4w	= sub { vsxmem_op(@_, 780); };	# lxvw4x
176my $stvx_4w	= sub { vsxmem_op(@_, 908); };	# stxvw4x
177
178# PowerISA 2.07 stuff
179sub vcrypto_op {
180    my ($f, $vrt, $vra, $vrb, $op) = @_;
181    "	.long	".sprintf "0x%X",(4<<26)|($vrt<<21)|($vra<<16)|($vrb<<11)|$op;
182}
183my $vcipher	= sub { vcrypto_op(@_, 1288); };
184my $vcipherlast	= sub { vcrypto_op(@_, 1289); };
185my $vncipher	= sub { vcrypto_op(@_, 1352); };
186my $vncipherlast= sub { vcrypto_op(@_, 1353); };
187my $vsbox	= sub { vcrypto_op(@_, 0, 1480); };
188my $vshasigmad	= sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1730); };
189my $vshasigmaw	= sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1666); };
190my $vpmsumb	= sub { vcrypto_op(@_, 1032); };
191my $vpmsumd	= sub { vcrypto_op(@_, 1224); };
192my $vpmsubh	= sub { vcrypto_op(@_, 1096); };
193my $vpmsumw	= sub { vcrypto_op(@_, 1160); };
194my $vaddudm	= sub { vcrypto_op(@_, 192);  };
195my $vadduqm	= sub { vcrypto_op(@_, 256);  };
196
197my $mtsle	= sub {
198    my ($f, $arg) = @_;
199    "	.long	".sprintf "0x%X",(31<<26)|($arg<<21)|(147*2);
200};
201
202print "#include <asm/ppc_asm.h>\n" if $flavour =~ /linux/;
203
204while($line=<>) {
205
206    $line =~ s|[#!;].*$||;	# get rid of asm-style comments...
207    $line =~ s|/\*.*\*/||;	# ... and C-style comments...
208    $line =~ s|^\s+||;		# ... and skip white spaces in beginning...
209    $line =~ s|\s+$||;		# ... and at the end
210
211    {
212	$line =~ s|\b\.L(\w+)|L$1|g;	# common denominator for Locallabel
213	$line =~ s|\bL(\w+)|\.L$1|g	if ($dotinlocallabels);
214    }
215
216    {
217	$line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||;
218	my $c = $1; $c = "\t" if ($c eq "");
219	my $mnemonic = $2;
220	my $f = $3;
221	my $opcode = eval("\$$mnemonic");
222	$line =~ s/\b(c?[rf]|v|vs)([0-9]+)\b/$2/g if ($c ne "." and $flavour !~ /osx/);
223	if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); }
224	elsif ($mnemonic)           { $line = $c.$mnemonic.$f."\t".$line; }
225    }
226
227    print $line if ($line);
228    print "\n";
229}
230
231close STDOUT;
232