1 #!/usr/bin/env perl
2 # SPDX-License-Identifier: GPL-2.0
3
4 # PowerPC assembler distiller by <appro>.
5
6 my $flavour = shift;
7 my $output = shift;
8 open STDOUT,">$output" || die "can't open $output: $!";
9
10 my %GLOBALS;
11 my $dotinlocallabels=($flavour=~/linux/)?1:0;
12
13 ################################################################
14 # directives which need special treatment on different platforms
15 ################################################################
16 my $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 };
41 my $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 };
46 my $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 };
55 my $size = sub {
56 if ($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 };
66 my $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 };
74 my $quad = sub {
75 shift;
76 my @ret;
77 my ($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 ################################################################
97 my $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100 # Some out-of-date 32-bit GNU assembler just can't handle cmplw...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 };
105 my $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/);
110 my $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 };
117 my $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 };
124 my $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.
133 my $extrdi = sub {
134 my ($f,$ra,$rs,$n,$b) = @_;
135 $b = ($b+$n)&63; $n = 64-$n;
136 " rldicl $ra,$rs,$b,$n";
137 };
138 my $vmr = sub {
139 my ($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.
145 my $no_vrsave = ($flavour =~ /linux-ppc64le/);
146 my $mtspr = sub {
147 my ($f,$idx,$ra) = @_;
148 if ($idx == 256 && $no_vrsave) {
149 " or $ra,$ra,$ra";
150 } else {
151 " mtspr $idx,$ra";
152 }
153 };
154 my $mfspr = sub {
155 my ($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
164 sub 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
169 my $lvx_u = sub { vsxmem_op(@_, 844); }; # lxvd2x
170 my $stvx_u = sub { vsxmem_op(@_, 972); }; # stxvd2x
171 my $lvdx_u = sub { vsxmem_op(@_, 588); }; # lxsdx
172 my $stvdx_u = sub { vsxmem_op(@_, 716); }; # stxsdx
173 my $lvx_4w = sub { vsxmem_op(@_, 780); }; # lxvw4x
174 my $stvx_4w = sub { vsxmem_op(@_, 908); }; # stxvw4x
175
176 # PowerISA 2.07 stuff
177 sub vcrypto_op {
178 my ($f, $vrt, $vra, $vrb, $op) = @_;
179 " .long ".sprintf "0x%X",(4<<26)|($vrt<<21)|($vra<<16)|($vrb<<11)|$op;
180 }
181 my $vcipher = sub { vcrypto_op(@_, 1288); };
182 my $vcipherlast = sub { vcrypto_op(@_, 1289); };
183 my $vncipher = sub { vcrypto_op(@_, 1352); };
184 my $vncipherlast= sub { vcrypto_op(@_, 1353); };
185 my $vsbox = sub { vcrypto_op(@_, 0, 1480); };
186 my $vshasigmad = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1730); };
187 my $vshasigmaw = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1666); };
188 my $vpmsumb = sub { vcrypto_op(@_, 1032); };
189 my $vpmsumd = sub { vcrypto_op(@_, 1224); };
190 my $vpmsubh = sub { vcrypto_op(@_, 1096); };
191 my $vpmsumw = sub { vcrypto_op(@_, 1160); };
192 my $vaddudm = sub { vcrypto_op(@_, 192); };
193 my $vadduqm = sub { vcrypto_op(@_, 256); };
194
195 my $mtsle = sub {
196 my ($f, $arg) = @_;
197 " .long ".sprintf "0x%X",(31<<26)|($arg<<21)|(147*2);
198 };
199
200 print "#include <asm/ppc_asm.h>\n" if $flavour =~ /linux/;
201
202 while($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
229 close STDOUT;
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