crypto/perlasm/ppc-xlate.pl

   1 #!/usr/bin/env perl
   2
   3 # PowerPC assembler distiller by <appro>.
   4
   5 my $flavour = shift;
   6 my $output = shift;
   7 open STDOUT,">$output" || die "can't open $output: $!";
   8
   9 my %GLOBALS;
  10 my $dotinlocallabels=($flavour=~/linux/)?1:0;
  11
  12 ################################################################
  13 # directives which need special treatment on different platforms
  14 ################################################################
  15 my $globl = sub {
  16     my $junk = shift;
  17     my $name = shift;
  18     my $global = \$GLOBALS{$name};
  19     my $ret;
  20
  21     $name =~ s|^[\.\_]||;
  22
  23     SWITCH: for ($flavour) {
  24         /aix/           && do { $name = ".$name";
  25                                 last;
  26                               };
  27         /osx/           && do { $name = "_$name";
  28                                 last;
  29                               };
  30         /linux.*(32|64le)/
  31                         && do { $ret .= ".globl $name\n";
  32                                 $ret .= ".type  $name,\@function";
  33                                 last;
  34                               };
  35         /linux.*64/     && do { $ret .= ".globl $name\n";
  36                                 $ret .= ".type  $name,\@function\n";
  37                                 $ret .= ".section       \".opd\",\"aw\"\n";
  38                                 $ret .= ".align 3\n";
  39                                 $ret .= "$name:\n";
  40                                 $ret .= ".quad  .$name,.TOC.\@tocbase,0\n";
  41                                 $ret .= ".previous\n";
  42
  43                                 $name = ".$name";
  44                                 last;
  45                               };
  46     }
  47
  48     $ret = ".globl      $name" if (!$ret);
  49     $$global = $name;
  50     $ret;
  51 };
  52 my $text = sub {
  53     my $ret = ($flavour =~ /aix/) ? ".csect\t.text[PR],7" : ".text";
  54     $ret = ".abiversion 2\n".$ret       if ($flavour =~ /linux.*64le/);
  55     $ret;
  56 };
  57 my $machine = sub {
  58     my $junk = shift;
  59     my $arch = shift;
  60     if ($flavour =~ /osx/)
  61     {   $arch =~ s/\"//g;
  62         $arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any");
  63     }
  64     ".machine   $arch";
  65 };
  66 my $size = sub {
  67     if ($flavour =~ /linux/)
  68     {   shift;
  69         my $name = shift; $name =~ s|^[\.\_]||;
  70         my $ret  = ".size       $name,.-".($flavour=~/64$/?".":"").$name;
  71         $ret .= "\n.size        .$name,.-.$name" if ($flavour=~/64$/);
  72         $ret;
  73     }
  74     else
  75     {   "";     }
  76 };
  77 my $asciz = sub {
  78     shift;
  79     my $line = join(",",@_);
  80     if ($line =~ /^"(.*)"$/)
  81     {   ".byte  " . join(",",unpack("C*",$1),0) . "\n.align     2";     }
  82     else
  83     {   "";     }
  84 };
  85 my $quad = sub {
  86     shift;
  87     my @ret;
  88     my ($hi,$lo);
  89     for (@_) {
  90         if (/^0x([0-9a-f]*?)([0-9a-f]{1,8})$/io)
  91         {  $hi=$1?"0x$1":"0"; $lo="0x$2";  }
  92         elsif (/^([0-9]+)$/o)
  93         {  $hi=$1>>32; $lo=$1&0xffffffff;  } # error-prone with 32-bit perl
  94         else
  95         {  $hi=undef; $lo=$_; }
  96
  97         if (defined($hi))
  98         {  push(@ret,$flavour=~/le$/o?".long\t$lo,$hi":".long\t$hi,$lo");  }
  99         else
 100         {  push(@ret,".quad     $lo");  }
 101     }
 102     join("\n",@ret);
 103 };
 104
 105 ################################################################
 106 # simplified mnemonics not handled by at least one assembler
 107 ################################################################
 108 my $cmplw = sub {
 109     my $f = shift;
 110     my $cr = 0; $cr = shift if ($#_>1);
 111     # Some out-of-date 32-bit GNU assembler just can't handle cmplw...
 112     ($flavour =~ /linux.*32/) ?
 113         "       .long   ".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 :
 114         "       cmplw   ".join(',',$cr,@_);
 115 };
 116 my $bdnz = sub {
 117     my $f = shift;
 118     my $bo = $f=~/[\+\-]/ ? 16+9 : 16;  # optional "to be taken" hint
 119     "   bc      $bo,0,".shift;
 120 } if ($flavour!~/linux/);
 121 my $bltlr = sub {
 122     my $f = shift;
 123     my $bo = $f=~/\-/ ? 12+2 : 12;      # optional "not to be taken" hint
 124     ($flavour =~ /linux/) ?             # GNU as doesn't allow most recent hints
 125         "       .long   ".sprintf "0x%x",19<<26|$bo<<21|16<<1 :
 126         "       bclr    $bo,0";
 127 };
 128 my $bnelr = sub {
 129     my $f = shift;
 130     my $bo = $f=~/\-/ ? 4+2 : 4;        # optional "not to be taken" hint
 131     ($flavour =~ /linux/) ?             # GNU as doesn't allow most recent hints
 132         "       .long   ".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 :
 133         "       bclr    $bo,2";
 134 };
 135 my $beqlr = sub {
 136     my $f = shift;
 137     my $bo = $f=~/-/ ? 12+2 : 12;       # optional "not to be taken" hint
 138     ($flavour =~ /linux/) ?             # GNU as doesn't allow most recent hints
 139         "       .long   ".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 :
 140         "       bclr    $bo,2";
 141 };
 142 # GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two
 143 # arguments is 64, with "operand out of range" error.
 144 my $extrdi = sub {
 145     my ($f,$ra,$rs,$n,$b) = @_;
 146     $b = ($b+$n)&63; $n = 64-$n;
 147     "   rldicl  $ra,$rs,$b,$n";
 148 };
 149 my $vmr = sub {
 150     my ($f,$vx,$vy) = @_;
 151     "   vor     $vx,$vy,$vy";
 152 };
 153
 154 # Some ABIs specify vrsave, special-purpose register #256, as reserved
 155 # for system use.
 156 my $no_vrsave = ($flavour =~ /aix|linux64le/);
 157 my $mtspr = sub {
 158     my ($f,$idx,$ra) = @_;
 159     if ($idx == 256 && $no_vrsave) {
 160         "       or      $ra,$ra,$ra";
 161     } else {
 162         "       mtspr   $idx,$ra";
 163     }
 164 };
 165 my $mfspr = sub {
 166     my ($f,$rd,$idx) = @_;
 167     if ($idx == 256 && $no_vrsave) {
 168         "       li      $rd,-1";
 169     } else {
 170         "       mfspr   $rd,$idx";
 171     }
 172 };
 173
 174 # PowerISA 2.06 stuff
 175 sub vsxmem_op {
 176     my ($f, $vrt, $ra, $rb, $op) = @_;
 177     "   .long   ".sprintf "0x%X",(31<<26)|($vrt<<21)|($ra<<16)|($rb<<11)|($op*2+1);
 178 }
 179 # made-up unaligned memory reference AltiVec/VMX instructions
 180 my $lvx_u       = sub { vsxmem_op(@_, 844); };  # lxvd2x
 181 my $stvx_u      = sub { vsxmem_op(@_, 972); };  # stxvd2x
 182 my $lvdx_u      = sub { vsxmem_op(@_, 588); };  # lxsdx
 183 my $stvdx_u     = sub { vsxmem_op(@_, 716); };  # stxsdx
 184 my $lvx_4w      = sub { vsxmem_op(@_, 780); };  # lxvw4x
 185 my $stvx_4w     = sub { vsxmem_op(@_, 908); };  # stxvw4x
 186
 187 # PowerISA 2.07 stuff
 188 sub vcrypto_op {
 189     my ($f, $vrt, $vra, $vrb, $op) = @_;
 190     "   .long   ".sprintf "0x%X",(4<<26)|($vrt<<21)|($vra<<16)|($vrb<<11)|$op;
 191 }
 192 my $vcipher     = sub { vcrypto_op(@_, 1288); };
 193 my $vcipherlast = sub { vcrypto_op(@_, 1289); };
 194 my $vncipher    = sub { vcrypto_op(@_, 1352); };
 195 my $vncipherlast= sub { vcrypto_op(@_, 1353); };
 196 my $vsbox       = sub { vcrypto_op(@_, 0, 1480); };
 197 my $vshasigmad  = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1730); };
 198 my $vshasigmaw  = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_, $st<<4|$six, 1666); };
 199 my $vpmsumb     = sub { vcrypto_op(@_, 1032); };
 200 my $vpmsumd     = sub { vcrypto_op(@_, 1224); };
 201 my $vpmsubh     = sub { vcrypto_op(@_, 1096); };
 202 my $vpmsumw     = sub { vcrypto_op(@_, 1160); };
 203 my $vaddudm     = sub { vcrypto_op(@_, 192);  };
 204
 205 my $mtsle       = sub {
 206     my ($f, $arg) = @_;
 207     "   .long   ".sprintf "0x%X",(31<<26)|($arg<<21)|(147*2);
 208 };
 209
 210 while($line=<>) {
 211
 212     $line =~ s|[#!;].*$||;      # get rid of asm-style comments...
 213     $line =~ s|/\*.*\*/||;      # ... and C-style comments...
 214     $line =~ s|^\s+||;          # ... and skip white spaces in beginning...
 215     $line =~ s|\s+$||;          # ... and at the end
 216
 217     {
 218         $line =~ s|\b\.L(\w+)|L$1|g;    # common denominator for Locallabel
 219         $line =~ s|\bL(\w+)|\.L$1|g     if ($dotinlocallabels);
 220     }
 221
 222     {
 223         $line =~ s|(^[\.\w]+)\:\s*||;
 224         my $label = $1;
 225         if ($label) {
 226             printf "%s:",($GLOBALS{$label} or $label);
 227             printf "\n.localentry\t$GLOBALS{$label},0"  if ($GLOBALS{$label} && $flavour =~ /linux.*64le/);
 228         }
 229     }
 230
 231     {
 232         $line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||;
 233         my $c = $1; $c = "\t" if ($c eq "");
 234         my $mnemonic = $2;
 235         my $f = $3;
 236         my $opcode = eval("\$$mnemonic");
 237         $line =~ s/\b(c?[rf]|v|vs)([0-9]+)\b/$2/g if ($c ne "." and $flavour !~ /osx/);
 238         if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); }
 239         elsif ($mnemonic)           { $line = $c.$mnemonic.$f."\t".$line; }
 240     }
 241
 242     print $line if ($line);
 243     print "\n";
 244 }
 245
 246 close STDOUT;