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

   1 #!/usr/bin/perl -w
   2
   3 # This script generates C code which emits assembler code for the
   4 # assembler ir nodes. It takes a "emit" key from the node specification
   5 # and substitutes lines starting with . with a corresponding fprintf().
   6 # Creation: 2005/11/07
   7 # $Id$
   8
   9 use strict;
  10 use Data::Dumper;
  11
  12 my $specfile   = $ARGV[0];
  13 my $target_dir = $ARGV[1];
  14
  15 our $arch;
  16 our %nodes;
  17
  18 # include spec file
  19
  20 my $return;
  21
  22 no strict "subs";
  23 unless ($return = do $specfile) {
  24         warn "couldn't parse $specfile: $@" if $@;
  25         warn "couldn't do $specfile: $!"    unless defined $return;
  26         warn "couldn't run $specfile"       unless $return;
  27 }
  28 use strict "subs";
  29
  30 my $target_c = $target_dir."/gen_".$arch."_emitter.c";
  31 my $target_h = $target_dir."/gen_".$arch."_emitter.h";
  32
  33 # stacks for output
  34 my @obst_func;   # stack for the emit functions
  35 my @obst_header;  # stack for the function prototypes
  36 my $line;
  37
  38 foreach my $op (keys(%nodes)) {
  39         my %n = %{ $nodes{"$op"} };
  40
  41         # skip this node description if no emit information is available
  42         next if (!$n{"emit"} || length($n{"emit"}) < 1);
  43
  44         $line = "void emit_".$arch."_".$op."(ir_node *n, emit_env_t *env)";
  45         push(@obst_header, $line.";\n");
  46         push(@obst_func, $line." {\n  FILE *F = env->out;\n");
  47
  48         my @emit = split(/\n/, $n{"emit"});
  49
  50         foreach my $template (@emit) {
  51                 # substitute only lines, starting with a '.'
  52                 if ($template =~ /^(\d*)\.\s*/) {
  53                         my @params;
  54                         my $res    = "";
  55                         my $indent = "  "; # default indent is 2 spaces
  56
  57                         $indent = " " x $1 if ($1 && $1 > 0);
  58                         # remove indent, dot and trailing spaces
  59                         $template =~ s/^\d*\.\s*//;
  60                         # substitute all format parameter
  61                         while ($template =~ /\%([ASD])(\d)|\%([COM])|\%(\w+)/) {
  62                                 $res  .= $`;      # get everything before the match
  63
  64                                 if ($1 && $1 eq "S") {
  65                                         push(@params, "n");
  66                                         $res .= "%".$2."S"; # substitute %Sx with %xS
  67                                 }
  68                                 elsif ($1 && $1 eq "D") {
  69                                         push(@params, "n");
  70                                         $res .= "%".$2."D"; # substitute %Dx with %xD
  71                                 }
  72                                 elsif ($1 && $1 eq "A") {
  73                                         push(@params, "get_irn_n(n, ".($2 - 1).")");
  74                                         $res .= "%+F";
  75                                 }
  76                                 elsif ($3) {
  77                                         push(@params, "n");
  78                                         $res .= "%".$3;
  79                                 }
  80                                 elsif ($4) {  # backend provided function to call, has to return a string
  81                                         push(@params, $4."(n)");
  82                                         $res .= "\%s";
  83                                 }
  84
  85                                 $template = $'; # scan everything after the match
  86                         }
  87                         $res  .= $template; # get the remaining string
  88
  89                         my $parm = "";
  90                         $parm = ", ".join(", ", @params) if (@params);
  91
  92                         push(@obst_func, $indent.'lc_efprintf('.$arch.'_get_arg_env(), F, "\t'.$res.'\n"'.$parm.');'."\n");
  93                 }
  94                 else {
  95                         push(@obst_func, $template,"\n");
  96                 }
  97         }
  98         push(@obst_func, "}\n\n");
  99 }
 100
 101 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 102
 103 my $creation_time = localtime(time());
 104
 105 my $tmp = uc($arch);
 106
 107 print OUT<<EOF;
 108 #ifndef _GEN_$tmp\_EMITTER_H_
 109 #define _GEN_$tmp\_EMITTER_H_
 110
 111 /**
 112  * Function prototypes for the emitter functions.
 113  * DO NOT EDIT THIS FILE, your changes will be lost.
 114  * Edit $specfile instead.
 115  * created by: $0 $specfile $target_dir
 116  * date:       $creation_time
 117  */
 118
 119 #include "irnode.h"
 120 #include "$arch\_emitter.h"
 121
 122 EOF
 123
 124 print OUT @obst_header;
 125
 126 print OUT "#endif /* _GEN_$tmp\_EMITTER_H_ */\n";
 127
 128 close(OUT);
 129
 130 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 131
 132 $creation_time = localtime(time());
 133
 134 print OUT<<EOF;
 135 /**
 136  * Generated functions to emit code for assembler ir nodes.
 137  * DO NOT EDIT THIS FILE, your changes will be lost.
 138  * Edit $specfile instead.
 139  * created by: $0 $specfile $target_dir
 140  * date:       $creation_time
 141  */
 142 #ifdef HAVE_CONFIG_H
 143 #include "config.h"
 144 #endif
 145
 146 #include <stdio.h>
 147
 148 #include "irnode.h"
 149 #include "gen_$arch\_emitter.h"
 150 #include "$arch\_new_nodes.h"
 151
 152 EOF
 153
 154 print OUT @obst_func;
 155
 156 close(OUT);