nsz Git - libfirm/blob - ir/be/scripts/generate_new_opcodes.pl

   1 #!/usr/bin/perl -w
   2
   3 # This script generates the C code which creates the irop's and
   4 # their coresponding node constructors for all operations in a given spec
   5 # so they can be used as normal firm nodes.
   6 # Creation: 2005/10/19
   7 # $Id$
   8
   9 use strict;
  10 use Data::Dumper;
  11
  12 my $specfile   = $ARGV[0];
  13 my $target_dir = $ARGV[1];
  14 my $state      = 1;
  15 my $cur_op     = "";
  16 my $line_nr    = 0;
  17
  18 our $arch;
  19 our $additional_opcodes;
  20 our %nodes;
  21 our %cpu;
  22 our $default_cmp_attr;
  23
  24 # include spec file
  25
  26 my $return;
  27
  28 no strict "subs";
  29 unless ($return = do $specfile) {
  30         warn "couldn't parse $specfile: $@" if $@;
  31         warn "couldn't do $specfile: $!"    unless defined $return;
  32         warn "couldn't run $specfile"       unless $return;
  33 }
  34 use strict "subs";
  35
  36 my $target_c = $target_dir."/gen_".$arch."_new_nodes.c.inl";
  37 my $target_h = $target_dir."/gen_".$arch."_new_nodes.h";
  38
  39 #print Dumper(%nodes);
  40 #print Dumper(%operands);
  41
  42 # create c code file from specs
  43
  44 my @obst_opvar;       # stack for the "ir_op *op_<arch>_<op-name> = NULL;" statements
  45 my @obst_get_opvar;   # stack for the get_op_<arch>_<op-name>() functions
  46 my @obst_constructor; # stack for node constructor functions
  47 my @obst_new_irop;    # stack for the new_ir_op calls
  48 my @obst_enum_op;     # stack for creating the <arch>_opcode enum
  49 my @obst_header;      # stack for function prototypes
  50 my @obst_is_archirn;  # stack for the is_$arch_irn() function
  51 my @obst_cmp_attr;    # stack for the compare attribute functions
  52 my @obst_proj;        # stack for the pn_ numbers
  53 my $orig_op;
  54 my $arity;
  55 my $cmp_attr_func;
  56 my $temp;
  57 my $n_opcodes = 0;    # number of opcodes
  58
  59 # for registering additional opcodes
  60 $n_opcodes += $additional_opcodes if (defined($additional_opcodes));
  61
  62 push(@obst_header, "void ".$arch."_create_opcodes(void);\n");
  63
  64 # create default compare function
  65 if(defined($default_cmp_attr)) {
  66         my $cmpcode = $default_cmp_attr;
  67         push(@obst_cmp_attr, "static int default_cmp_attr(ir_node *a, ir_node *b) {\n");
  68         if($cmpcode =~ m/attr_a/) {
  69                 push(@obst_cmp_attr, "\t$arch\_attr_t *attr_a = get_$arch\_attr(a);\n");
  70         }
  71         if($cmpcode =~ m/attr_b/) {
  72                 push(@obst_cmp_attr, "\t$arch\_attr_t *attr_b = get_$arch\_attr(b);\n");
  73         }
  74         push(@obst_cmp_attr, "\t${cmpcode}\n");
  75         push(@obst_cmp_attr, "}\n\n");
  76 }
  77
  78 push(@obst_enum_op, "typedef enum _$arch\_opcodes {\n");
  79 foreach my $op (keys(%nodes)) {
  80         my %n        = %{ $nodes{"$op"} };
  81         my $known_mode;
  82         my $n_res    = 0;
  83         my $num_outs = 0;
  84         my @out_flags;
  85
  86         # determine arity from in requirements
  87         $arity = exists($n{"arity"}) ? $n{"arity"} : 0;
  88         if (exists($n{"reg_req"}) && exists($n{"reg_req"}{"in"})) {
  89                 $arity = scalar(@{ $n{"reg_req"}{"in"} });
  90         }
  91
  92         $orig_op = $op;
  93         $op      = $arch."_".$op;
  94         $temp    = "";
  95
  96         # define some proj numbers
  97         if (exists($n{"outs"})) {
  98                 undef my @outs;
  99
 100                 @outs     = @{ $n{"outs"} };
 101                 $num_outs = $#outs + 1;
 102
 103                 push(@obst_proj, "\nenum pn_$op {\n");
 104
 105                 for (my $idx = 0; $idx <= $#outs; $idx++) {
 106                         # check, if we have additional flags annotated to out
 107                         if ($outs[$idx] =~ /:((S|I)(\|(S|I))*)/) {
 108                                 push(@out_flags, $1);
 109                                 $outs[$idx] =~ s/:((S|I)(\|(S|I))*)//;
 110                         }
 111                         push(@obst_proj, "  pn_$op\_".$outs[$idx]." = $idx,\n");
 112                 }
 113
 114                 push(@obst_proj, "};\n");
 115                 $known_mode = "mode_T";
 116         }
 117         if (exists($n{"mode"})) {
 118                 $known_mode = $n{"mode"};
 119         }
 120
 121         push(@obst_opvar, "ir_op *op_$op = NULL;\n");
 122         push(@obst_get_opvar, "ir_op *get_op_$op(void)         { return op_$op; }\n");
 123         push(@obst_get_opvar, "int    is_$op(const ir_node *n) { return get_$arch\_irn_opcode(n) == iro_$op; }\n\n");
 124
 125         push(@obst_is_archirn, "is_$op(node)");
 126
 127         push(@obst_header, "extern ir_op *op_$op;\n");
 128         push(@obst_header, "ir_op *get_op_$op(void);\n");
 129         push(@obst_header, "int is_$op(const ir_node *n);\n");
 130
 131         my $cmp_attr_func;
 132         if(defined($default_cmp_attr)) {
 133                 $cmp_attr_func = "default_cmp_attr";
 134         }
 135         # create compare attribute function if needed
 136         if (exists($n{"cmp_attr"})) {
 137                 my $cmpcode = $n{"cmp_attr"};
 138
 139                 push(@obst_cmp_attr, "static int cmp_attr_$op(ir_node *a, ir_node *b) {\n");
 140                 if($cmpcode =~ m/attr_a/) {
 141                         push(@obst_cmp_attr, "\t$arch\_attr_t *attr_a = get_$arch\_attr(a);\n");
 142                 }
 143                 if($cmpcode =~ m/attr_b/) {
 144                         push(@obst_cmp_attr, "\t$arch\_attr_t *attr_b = get_$arch\_attr(b);\n");
 145                 }
 146                 push(@obst_cmp_attr, "\t${cmpcode}\n");
 147                 push(@obst_cmp_attr, "}\n\n");
 148
 149                 $cmp_attr_func = "cmp_attr_${op}";
 150         }
 151
 152         if (exists($n{"rd_constructor"}) && $n{"rd_constructor"} =~ /^NONE$/i) {
 153                 # we explicitly skip the constructor if the specification entry says NONE
 154         }
 155         else {
 156                 $n{"comment"} = "construct $op" if(!exists($n{"comment"}));
 157                 $n{"comment"} =~ s/^"|"$//g;    # remove "
 158                 $n{"comment"} = "/* ".$n{"comment"}." */\n";
 159                 push(@obst_constructor, $n{"comment"});
 160
 161                 # create constructor head
 162                 my $complete_args = "";
 163                 my $arg_names     = "";
 164                 $temp             = "";
 165
 166                 $temp = "ir_node *new_rd_$op(dbg_info *db, ir_graph *irg, ir_node *block";
 167                 if (!exists($n{"args"}) || $n{"args"} =~ /^DEFAULT$/i) { # default args
 168                         if ($arity !~ /^\d+$/) {
 169                                 print "DEFAULT args require numeric arity (0, 1, 2, ...)! Ignoring op $orig_op!\n";
 170                                 next;
 171                         }
 172                         for (my $i = 1; $i <= $arity; $i++) {
 173                                 $complete_args .= ", ir_node *op".$i;
 174                                 $arg_names     .= ", op".$i;
 175                         }
 176                         if (!defined($known_mode)) {
 177                                 $complete_args .= ", ir_mode *mode";
 178                                 $arg_names     .= ", mode";
 179                         }
 180                 }
 181                 else { # user defined args
 182                         for my $href (@{ $n{"args"} }) {
 183                                 $href->{"type"} .= " " if ($href->{"type"} !~ / [*]?$/); # put a space between name and type if there is none at the end
 184                                 $complete_args  .= ", ".$href->{"type"}.$href->{"name"};
 185                                 $arg_names      .= ", ".$href->{"name"};
 186                         }
 187                 }
 188
 189                 # we have additional attribute arguements
 190                 if (exists($n{"attr"})) {
 191                         $complete_args .= ", ".$n{"attr"};
 192                 }
 193
 194                 # $complete_args = substr($complete_args, 2);
 195                 $temp .= "$complete_args)";
 196                 push(@obst_constructor, $temp." {\n");
 197                 push(@obst_header, $n{"comment"});
 198                 push(@obst_header, $temp.";\n");
 199
 200                 # emit constructor code
 201                 if (!exists($n{"rd_constructor"}) || $n{"rd_constructor"} =~ /^DEFAULT$/i) { # default constructor
 202                         if ($arity !~ /^\d+$/) {
 203                                 print "DEFAULT rd_constructor requires numeric arity! Ignoring op $orig_op!\n";
 204                                 next;
 205                         }
 206
 207                         $temp  = "\tir_node *res;\n";
 208                         $temp .= "\tir_node *in[$arity];\n" if ($arity > 0);
 209                         $temp .= "\tint flags = 0;\n";
 210                         $temp .= "\t$arch\_attr_t *attr;\n" if (exists($n{"init_attr"}));
 211
 212                         my $exec_units = "NULL";
 213                         # set up static variables for cpu execution unit assigments
 214                         if (exists($n{"units"})) {
 215                                 $temp .= gen_execunit_list_initializer($n{"units"});
 216                                 $exec_units = "_exec_units";
 217                         }
 218
 219                         undef my $in_req_var;
 220                         undef my $out_req_var;
 221
 222                         # set up static variables for requirements and registers
 223                         if (exists($n{"reg_req"})) {
 224                                 my %req = %{ $n{"reg_req"} };
 225                                 my $idx;
 226
 227                                 undef my @in;
 228                                 @in = @{ $req{"in"} } if (exists($req{"in"}));
 229                                 undef my @out;
 230                                 @out = @{ $req{"out"} } if exists(($req{"out"}));
 231
 232                                 if (@in) {
 233                                         $in_req_var = "_in_req_$op";
 234                                         $temp .= "\tstatic const arch_register_req_t *".$in_req_var."[] =\n";
 235                                         $temp .= "\t{\n";
 236                                         for ($idx = 0; $idx <= $#in; $idx++) {
 237                                                 $temp .= "\t\t&".$op."_reg_req_in_".$idx.",\n";
 238                                         }
 239                                         $temp .= "\t};\n";
 240                                 }
 241
 242                                 if (@out) {
 243                                         $out_req_var = "_out_req_$op";
 244
 245                                         $temp .= "\tstatic const arch_register_req_t *".$out_req_var."[] =\n";
 246                                         $temp .= "\t{\n";
 247                                         for ($idx = 0; $idx <= $#out; $idx++) {
 248                                                 $temp .= "\t\t&".$op."_reg_req_out_".$idx.",\n";
 249                                         }
 250                                         $temp .= "\t};\n";
 251                                 }
 252                         }
 253
 254                         $temp .= "\n";
 255                         $temp .= "\tassert(op_$op != NULL);\n\n";
 256
 257                         for (my $i = 1; $i <= $arity; $i++) {
 258                                 $temp .= "\tin[".($i - 1)."] = op".$i.";\n";
 259                         }
 260
 261                         # set flags
 262                         if (exists($n{"irn_flags"})) {
 263                                 foreach my $flag (split(/\|/, $n{"irn_flags"})) {
 264                                         if ($flag eq "R") {
 265                                                 $temp .= "\tflags |= arch_irn_flags_rematerializable;   /* op can be easily recalculated */\n";
 266                                         }
 267                                         elsif ($flag eq "N") {
 268                                                 $temp .= "\tflags |= arch_irn_flags_dont_spill;         /* op is NOT spillable */\n";
 269                                         }
 270                                         elsif ($flag eq "I") {
 271                                                 $temp .= "\tflags |= arch_irn_flags_ignore;             /* ignore op for register allocation */\n";
 272                                         }
 273                                         elsif ($flag eq "S") {
 274                                                 $temp .= "\tflags |= arch_irn_flags_modify_sp;          /* op modifies stack pointer */\n";
 275                                         }
 276                                 }
 277                         }
 278
 279                         my $in_param;
 280                         my $out_param;
 281                         # allocate memory and set pointer to register requirements
 282                         if (exists($n{"reg_req"})) {
 283                                 my %req = %{ $n{"reg_req"} };
 284
 285                                 undef my @in;
 286                                 @in = @{ $req{"in"} } if (exists($req{"in"}));
 287                                 undef my @out;
 288                                 @out = @{ $req{"out"} } if exists(($req{"out"}));
 289
 290                                 if (@in) {
 291                                         $in_param = $in_req_var;
 292                                 }
 293                                 else {
 294                                         $in_param = "NULL";
 295                                 }
 296
 297                                 if (@out) {
 298                                         $n_res     = $#out + 1;
 299                                         $out_param = "$out_req_var, $exec_units, $n_res";
 300                                 }
 301                                 else {
 302                                         $out_param = "NULL, $exec_units, 0";
 303                                 }
 304                         }
 305                         else {
 306                                 $in_param  = "NULL";
 307                                 $out_param = "NULL, $exec_units, 0";
 308                         }
 309                         $temp .= "\n\t/* create node */\n";
 310
 311                         my $latency = 1;
 312                         if (exists($n{"latency"})) {
 313                                 $latency = $n{"latency"};
 314                         }
 315
 316                         my $mode = "mode";
 317                         if (defined($known_mode)) {
 318                                 $mode = $known_mode;
 319                         }
 320                         $temp .= "\tres = new_ir_node(db, irg, block, op_$op, $mode, $arity, ".($arity > 0 ? "in" : "NULL").");\n";
 321
 322                         $temp .= "\n\t/* init node attributes */\n";
 323                         $temp .= "\tinit_$arch\_attributes(res, flags, $in_param, $out_param, $latency);\n";
 324
 325                         # set flags for outs
 326                         if ($#out_flags >= 0) {
 327                                 $temp .= "\n\t/* set flags for outs */\n";
 328                                 for (my $idx = 0; $idx <= $#out_flags; $idx++) {
 329                                         my $flags  = "";
 330                                         my $prefix = "";
 331
 332                                         foreach my $flag (split(/\|/, $out_flags[$idx])) {
 333                                                 if ($flag eq "I") {
 334                                                         $flags .= $prefix."arch_irn_flags_ignore";
 335                                                         $prefix = " | ";
 336                                                 }
 337                                                 elsif ($flag eq "S") {
 338                                                         $flags .= $prefix."arch_irn_flags_modify_sp";
 339                                                         $prefix = " | ";
 340                                                 }
 341                                         }
 342
 343                                         $temp .= "\tset_$arch\_out_flags(res, $flags, $idx);\n";
 344                                 }
 345                         }
 346
 347
 348                         if (exists($n{"init_attr"})) {
 349                                 $temp .= "\tattr = get_$arch\_attr(res);\n";
 350                                 $temp .= $n{"init_attr"}."\n";
 351                         }
 352
 353                         $temp .= "\n\t/* optimize node */\n";
 354                         $temp .= "\tres = optimize_node(res);\n";
 355                         $temp .= "\tirn_vrfy_irg(res, irg);\n\n";
 356
 357                         $temp .= "\n\treturn res;\n";
 358
 359                         push(@obst_constructor, $temp);
 360                 }
 361                 else { # user defined constructor
 362                         push(@obst_constructor, $n{"rd_constructor"});
 363                 }
 364
 365                 # close constructor function
 366                 push(@obst_constructor, "}\n\n");
 367         } # constructor creation
 368
 369         # set default values for state and flags if not given
 370         $n{"state"}    = "floats" if (! exists($n{"state"}));
 371         $n{"op_flags"} = "N"      if (! exists($n{"op_flags"}));
 372
 373
 374         push(@obst_new_irop, "\n\tmemset(&ops, 0, sizeof(ops));\n");
 375         push(@obst_new_irop, "\tops.dump_node     = $arch\_dump_node;\n");
 376
 377         if (defined($cmp_attr_func)) {
 378                 push(@obst_new_irop, "\tops.node_cmp_attr = ${cmp_attr_func};\n");
 379         }
 380
 381         $n_opcodes++;
 382         $temp  = "\top_$op = new_ir_op(cur_opcode + iro_$op, \"$op\", op_pin_state_".$n{"state"}.", ".$n{"op_flags"};
 383         $temp .= "|M, ".translate_arity($arity).", 0, sizeof($arch\_attr_t) + $n_res * sizeof(arch_register_t *), &ops);\n";
 384         push(@obst_new_irop, $temp);
 385         push(@obst_new_irop, "\tset_op_tag(op_$op, &$arch\_op_tag);\n");
 386         push(@obst_enum_op, "\tiro_$op,\n");
 387
 388         push(@obst_header, "\n");
 389 }
 390 push(@obst_enum_op, "\tiro_$arch\_last_generated,\n");
 391 push(@obst_enum_op, "\tiro_$arch\_last = iro_$arch\_last_generated");
 392 push(@obst_enum_op, " + $additional_opcodes") if (defined($additional_opcodes));
 393 push(@obst_enum_op, "\n} $arch\_opcodes;\n\n");
 394
 395 # emit the code
 396
 397 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 398
 399 print OUT "#include \"gen_$arch\_regalloc_if_t.h\"\n\n";
 400 print OUT @obst_cmp_attr;
 401 print OUT "\n";
 402 print OUT @obst_opvar;
 403 print OUT "\n";
 404 print OUT @obst_get_opvar;
 405 print OUT "\n";
 406
 407 print OUT<<EOF;
 408
 409 static int $arch\_opcode_start = -1;
 410 static int $arch\_opcode_end   = -1;
 411
 412 EOF
 413
 414 # build the FOURCC arguments from $arch
 415
 416 my ($a, $b, $c, $d) = ('\0', '\0', '\0', '\0');
 417
 418 if (length($arch) >= 1) {
 419         $a = uc(substr($arch, 0, 1));
 420 }
 421
 422 if (length($arch) >= 2) {
 423         $b = uc(substr($arch, 1, 1));
 424 }
 425
 426 if (length($arch) >= 3) {
 427         $c = uc(substr($arch, 2, 1));
 428 }
 429
 430 if (length($arch) >= 4) {
 431         $d = uc(substr($arch, 3, 1));
 432 }
 433
 434 print OUT "static unsigned $arch\_op_tag = FOURCC('$a', '$b', '$c', '$d');\n";
 435
 436 print OUT<<ENDOFISIRN;
 437
 438 /** Return the opcode number of the first $arch opcode. */
 439 int get_$arch\_opcode_first(void) {
 440         return $arch\_opcode_start;
 441 }
 442
 443 /** Return the opcode number of the last $arch opcode + 1. */
 444 int get_$arch\_opcode_last(void) {
 445         return $arch\_opcode_end;
 446 }
 447
 448 /** Return 1 if the given node is a $arch machine node, 0 otherwise */
 449 int is_$arch\_irn(const ir_node *node) {
 450         return get_op_tag(get_irn_op(node)) == &$arch\_op_tag;
 451 }
 452
 453 int get_$arch\_irn_opcode(const ir_node *node) {
 454         if (is_$arch\_irn(node))
 455                 return get_irn_opcode(node) - $arch\_opcode_start;
 456         return -1;
 457 }
 458
 459 ENDOFISIRN
 460
 461 print OUT @obst_constructor;
 462
 463 print OUT<<ENDOFMAIN;
 464 /**
 465  * Creates the $arch specific Firm machine operations
 466  * needed for the assembler irgs.
 467  */
 468 void $arch\_create_opcodes(void) {
 469 #define N   irop_flag_none
 470 #define L   irop_flag_labeled
 471 #define C   irop_flag_commutative
 472 #define X   irop_flag_cfopcode
 473 #define I   irop_flag_ip_cfopcode
 474 #define F   irop_flag_fragile
 475 #define Y   irop_flag_forking
 476 #define H   irop_flag_highlevel
 477 #define c   irop_flag_constlike
 478 #define K   irop_flag_keep
 479 #define M   irop_flag_machine
 480 #define O   irop_flag_machine_op
 481 #define R   (irop_flag_user << 0)
 482
 483         ir_op_ops  ops;
 484         int        cur_opcode;
 485         static int run_once = 0;
 486
 487         if (run_once)
 488                 return;
 489         run_once = 1;
 490
 491         cur_opcode = get_next_ir_opcodes(iro_$arch\_last);
 492
 493         $arch\_opcode_start = cur_opcode;
 494 ENDOFMAIN
 495
 496 print OUT @obst_new_irop;
 497 print OUT "\n";
 498 print OUT "\t$arch\_register_additional_opcodes(cur_opcode);\n" if (defined($additional_opcodes));
 499 print OUT "\t$arch\_opcode_end = cur_opcode + iro_$arch\_last";
 500 print OUT " + $additional_opcodes" if (defined($additional_opcodes));
 501 print OUT ";\n";
 502 print OUT "}\n";
 503
 504 close(OUT);
 505
 506 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 507
 508 print OUT "#ifndef __GEN_$arch\_NEW_NODES_H__\n";
 509 print OUT "#define __GEN_$arch\_NEW_NODES_H__\n\n";
 510 print OUT @obst_enum_op;
 511 print OUT "int is_$arch\_irn(const ir_node *node);\n\n";
 512 print OUT "int get_$arch\_opcode_first(void);\n";
 513 print OUT "int get_$arch\_opcode_last(void);\n";
 514 print OUT "int get_$arch\_irn_opcode(const ir_node *node);\n";
 515 print OUT @obst_header;
 516 print OUT @obst_proj;
 517 print OUT "\n#endif /* __GEN_$arch\_NEW_NODES_H__ */\n";
 518
 519 close(OUT);
 520
 521 ###
 522 # Translates numeric arity into string constant.
 523 ###
 524 sub translate_arity {
 525         my $arity = shift;
 526
 527         if ($arity =~ /^\d+$/) {
 528                 if    ($arity == 0) {
 529                         return "oparity_zero";
 530                 }
 531                 elsif ($arity == 1) {
 532                         return "oparity_unary";
 533                 }
 534                 elsif ($arity == 2) {
 535                         return "oparity_binary";
 536                 }
 537                 elsif ($arity == 3) {
 538                         return "oparity_trinary";
 539                 }
 540                 else {
 541                         return "oparity_any";
 542                 }
 543         }
 544         else {
 545                 return "oparity_".$arity;
 546         }
 547 }
 548
 549 ###
 550 # Return the list of pointers for the given execution units.
 551 ###
 552 sub gen_execunit_list_initializer {
 553         my $units   = shift;
 554         my $uc_arch = uc($arch);
 555         my $ret     = "";
 556         my $ret2    = "";
 557         my %init;
 558
 559         foreach my $unit (@{ $units }) {
 560                 if ($unit eq "DUMMY") {
 561                         push(@{ $init{"DUMMY"} }, "\t\t&be_machine_execution_units_DUMMY[0]");
 562                 }
 563                 elsif (exists($cpu{"$unit"})) {
 564                         # operation can be executed on all units of this type
 565                         # -> add them all
 566                         my $tp_name = "$arch\_execution_units_$unit";
 567                         my $idx     = 0;
 568                         foreach (@{ $cpu{"$unit"} }) {
 569                                 next if ($idx++ == 0);  # skip first element (it's not a unit)
 570                                 my $unit_name = "$uc_arch\_EXECUNIT_TP_$unit\_$_";
 571                                 push(@{ $init{"$unit"} }, "\t\t&".$tp_name."[".$unit_name."]");
 572                         }
 573                 }
 574                 else {
 575                         # operation can be executed only a certain unit
 576                         # -> find corresponding unit type
 577                         my $found = 0;
 578 TP_SEARCH:      foreach my $cur_type (keys(%cpu)) {
 579                                 foreach my $cur_unit (@{ $cpu{"$cur_type"} }) {
 580                                         if ($unit eq $cur_unit) {
 581                                                 my $tp_name   = "$arch\_execution_units_$cur_type";
 582                                                 my $unit_name = "$uc_arch\_EXECUNIT_TP_$cur_type\_$unit";
 583                                                 push(@{ $init{"$unit"} }, "\t\t&".$tp_name."[".$unit_name."]");
 584                                                 $found = 1;
 585                                                 last TP_SEARCH;
 586                                         }
 587                                 }
 588                         }
 589
 590                         if (! $found) {
 591                                 print STDERR "Invalid execution unit $unit specified!\n";
 592                         }
 593                 }
 594         }
 595
 596         # prepare the 2-dim array init
 597         foreach my $key (keys(%init)) {
 598                 $ret .= "\tstatic const be_execution_unit_t *_allowed_units_".$key."[] =\n";
 599                 $ret .= "\t{\n";
 600                 foreach (@{ $init{"$key"} }) {
 601                         $ret .= "$_,\n";
 602                 }
 603                 $ret .= "\t\tNULL\n";
 604                 $ret .= "\t};\n";
 605                 $ret2 .= "\t\t_allowed_units_$key,\n";
 606         }
 607         $ret2 .= "\t\tNULL\n";
 608
 609         $ret .= "\tstatic const be_execution_unit_t **_exec_units[] =\n";
 610         $ret .= "\t{\n";
 611         $ret .= $ret2;
 612         $ret .= "\t};\n";
 613
 614         return $ret;
 615 }