drivers/crypto/vmx/ppc-xlate.pl

   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;