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_register;  # stack for emitter register code
  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         $line = "static void emit_".$arch."_".$op."(const ir_node *n, emit_env_t *env)";
  45         push(@obst_func, $line." {\n  FILE *F = env->out;\n");
  46         push(@obst_func, "  char cmd_buf[256], cmnt_buf[256];\n");
  47         push(@obst_func, "  const lc_arg_env_t *arg_env = $arch\_get_arg_env();\n\n");
  48         push(@obst_register, "  BE_EMIT($op);\n");
  49
  50         my @emit = split(/\n/, $n{"emit"});
  51
  52         foreach my $template (@emit) {
  53                 # substitute only lines, starting with a '.'
  54                 if ($template =~ /^(\d*)\.\s*/) {
  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                         my $fmt = $template;
  61                         my $cnt = 0;
  62                         my $buf = 'cmd_buf';
  63
  64                         foreach $template (split(/\/\*/, $fmt, 2)) {
  65                                 my @params;
  66                                 my $res = "";
  67                                 $cnt++;
  68
  69                                 $template =~ s/(\\t)*$//;
  70
  71                                 if ($cnt == 2) {
  72                                         # add the comment begin string
  73                                         $res .= "/*";
  74                                         $buf = "cmnt_buf";
  75                                 }
  76
  77                                 # substitute all format parameter
  78                                 while ($template =~ /\%([ASD])(\d)|\%([COM])|\%(\w+)/) {
  79                                         $res  .= $`;      # get everything before the match
  80
  81                                         if ($1 && $1 eq "S") {
  82                                                 push(@params, "n");
  83                                                 $res .= "%".$2."S"; # substitute %Sx with %xS
  84                                         }
  85                                         elsif ($1 && $1 eq "D") {
  86                                                 push(@params, "n");
  87                                                 $res .= "%".$2."D"; # substitute %Dx with %xD
  88                                         }
  89                                         elsif ($1 && $1 eq "A") {
  90                                                 push(@params, "get_irn_n(n, ".($2 - 1).")");
  91                                                 $res .= "%+F";
  92                                         }
  93                                         elsif ($3) {
  94                                                 push(@params, "n");
  95                                                 $res .= "%".$3;
  96                                         }
  97                                         elsif ($4) {  # backend provided function to call, has to return a string
  98                                                 push(@params, $4."(n)");
  99                                                 $res .= "\%s";
 100                                         }
 101
 102                                         $template = $'; # scan everything after the match
 103                                 }
 104                                 $res .= $template; # get the remaining string
 105
 106                                 my $parm = "";
 107                                 $parm = ", ".join(", ", @params) if (@params);
 108
 109                                 push(@obst_func, $indent.'lc_esnprintf(arg_env, '.$buf.', 256, "'.$res.'"'.$parm.');'."\n");
 110                         }
 111                 }
 112                 else {
 113                         push(@obst_func, $template,"\n");
 114                 }
 115         }
 116
 117         push(@obst_func, '  lc_efprintf(arg_env, F, "\t%-35s %-60s /* %+F */\n", cmd_buf, cmnt_buf, n);'."\n");
 118         push(@obst_func, "}\n\n");
 119 }
 120
 121 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 122
 123 my $creation_time = localtime(time());
 124
 125 my $tmp = uc($arch);
 126
 127 print OUT<<EOF;
 128 #ifndef _GEN_$tmp\_EMITTER_H_
 129 #define _GEN_$tmp\_EMITTER_H_
 130
 131 /**
 132  * Function prototypes for the emitter functions.
 133  * DO NOT EDIT THIS FILE, your changes will be lost.
 134  * Edit $specfile instead.
 135  * created by: $0 $specfile $target_dir
 136  * date:       $creation_time
 137  */
 138
 139 #include "irnode.h"
 140 #include "$arch\_emitter.h"
 141
 142 void $arch\_register_spec_emitters(void);
 143
 144 #endif /* _GEN_$tmp\_EMITTER_H_ */
 145
 146 EOF
 147
 148 close(OUT);
 149
 150 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 151
 152 $creation_time = localtime(time());
 153
 154 print OUT<<EOF;
 155 /**
 156  * Generated functions to emit code for assembler ir nodes.
 157  * DO NOT EDIT THIS FILE, your changes will be lost.
 158  * Edit $specfile instead.
 159  * created by: $0 $specfile $target_dir
 160  * date:       $creation_time
 161  */
 162 #ifdef HAVE_CONFIG_H
 163 #include "config.h"
 164 #endif
 165
 166 #include <stdio.h>
 167
 168 #include "irnode.h"
 169 #include "irop_t.h"
 170 #include "irprog_t.h"
 171
 172 #include "gen_$arch\_emitter.h"
 173 #include "$arch\_new_nodes.h"
 174
 175 EOF
 176
 177 print OUT @obst_func;
 178
 179 print OUT<<EOF;
 180 /**
 181  * Enters the emitter functions for handled nodes into the generic
 182  * pointer of an opcode.
 183  */
 184 void $arch\_register_spec_emitters(void) {
 185
 186 #define BE_EMIT(a) op_$arch\_##a->ops.generic = (op_func)emit_$arch\_##a
 187
 188   /* generated emitter functions */
 189 EOF
 190
 191 print OUT @obst_register;
 192
 193 print OUT<<EOF;
 194
 195 #undef BE_EMIT
 196 }
 197
 198 EOF
 199
 200 close(OUT);