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 $comment_string;
  17 our $comment_string_end;
  18 our %nodes;
  19
  20 # include spec file
  21
  22 my $return;
  23
  24 no strict "subs";
  25 unless ($return = do $specfile) {
  26         warn "couldn't parse $specfile: $@" if $@;
  27         warn "couldn't do $specfile: $!"    unless defined $return;
  28         warn "couldn't run $specfile"       unless $return;
  29 }
  30 use strict "subs";
  31
  32 my $comment_string_quoted = quotemeta($comment_string);
  33
  34 my $target_c = $target_dir."/gen_".$arch."_emitter.c";
  35 my $target_h = $target_dir."/gen_".$arch."_emitter.h";
  36
  37 # stacks for output
  38 my @obst_func;   # stack for the emit functions
  39 my @obst_register;  # stack for emitter register code
  40 my $line;
  41
  42 foreach my $op (keys(%nodes)) {
  43         my %n = %{ $nodes{"$op"} };
  44
  45         # skip this node description if no emit information is available
  46         next if (!defined($n{"emit"}));
  47
  48         $line = "static void emit_".$arch."_".$op."(const ir_node *n, $arch\_emit_env_t *env)";
  49
  50         push(@obst_register, "  BE_EMIT($op);\n");
  51
  52         if($n{"emit"} eq "") {
  53                 push(@obst_func, $line." {\n");
  54                 push(@obst_func, "}\n\n");
  55                 next;
  56         }
  57
  58         push(@obst_func, $line." {\n  FILE *F = env->out;\n");
  59         push(@obst_func, "  char cmd_buf[256], cmnt_buf[256];\n");
  60         push(@obst_func, "  const lc_arg_env_t *arg_env = $arch\_get_arg_env();\n\n");
  61         my @emit = split(/\n/, $n{"emit"});
  62
  63         foreach my $template (@emit) {
  64                 # substitute only lines, starting with a '.'
  65                 if ($template =~ /^(\d*)\.\s*/) {
  66                         my $indent = "  "; # default indent is 2 spaces
  67
  68                         $indent = " " x $1 if ($1 && $1 > 0);
  69                         # remove indent, dot and trailing spaces
  70                         $template =~ s/^\d*\.\s*//;
  71                         my $fmt = $template;
  72                         my $cnt = 0;
  73                         my $buf = 'cmd_buf';
  74
  75                         push(@obst_func, $indent."cmnt_buf[0] = '\\0';\n");
  76                         foreach $template (split(/$comment_string_quoted/, $fmt, 2)) {
  77                                 my @params;
  78                                 my $res = "";
  79                                 $cnt++;
  80
  81                                 $template =~ s/(\\t)*$//;
  82
  83                                 if ($cnt == 2) {
  84                                         # add the comment begin string
  85                                         $res .= $comment_string;
  86                                         $buf  = "cmnt_buf";
  87                                 }
  88
  89                                 # substitute all format parameter
  90                                 while ($template =~ /(\%\%)|\%([ASDX])(\d)|\%([COM])|\%(\w+)/) {
  91                                         $res  .= $`;      # get everything before the match
  92
  93                                         if ($1) {
  94                                                 $res .= "%%";
  95                                         }
  96                                         elsif ($2 && $2 eq "S") {
  97                                                 push(@params, "n");
  98                                                 $res .= "%".$3."S"; # substitute %Sx with %xS
  99                                         }
 100                                         elsif ($2 && $2 eq "D") {
 101                                                 push(@params, "n");
 102                                                 $res .= "%".$3."D"; # substitute %Dx with %xD
 103                                         }
 104                                         elsif ($2 && $2 eq "X") {
 105                                                 push(@params, "n");
 106                                                 $res .= "%".$3."X"; # substitute %Xx with %xX
 107                                         }
 108                                         elsif ($2 && $2 eq "A") {
 109                                                 push(@params, "get_irn_n(n, ".($3 - 1).")");
 110                                                 $res .= "%+F";
 111                                         }
 112                                         elsif ($4) {
 113                                                 push(@params, "n");
 114                                                 $res .= "%".$4;
 115                                         }
 116                                         elsif ($5) {  # backend provided function to call, has to return a string
 117                                                 push(@params, $5."(n, env)");
 118                                                 $res .= "\%s";
 119                                         }
 120
 121                                         $template = $'; # scan everything after the match
 122                                 }
 123                                 $res .= $template; # get the remaining string
 124
 125                                 my $parm = "";
 126                                 $parm = ", ".join(", ", @params) if (@params);
 127
 128                                 push(@obst_func, $indent.'lc_esnprintf(arg_env, '.$buf.', 256, "'.$res.'"'.$parm.');'."\n");
 129                         }
 130                         push(@obst_func, $indent.'lc_efprintf(arg_env, F, "\t%-35s %-60s '.$comment_string.' %+F (%+G) '.$comment_string_end.'\n", cmd_buf, cmnt_buf, n, n);'."\n");
 131                 }
 132                 else {
 133                         push(@obst_func, $template,"\n");
 134                 }
 135         }
 136
 137         push(@obst_func, "}\n\n");
 138 }
 139
 140 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 141
 142 my $creation_time = localtime(time());
 143
 144 my $tmp = uc($arch);
 145
 146 print OUT<<EOF;
 147 #ifndef _GEN_$tmp\_EMITTER_H_
 148 #define _GEN_$tmp\_EMITTER_H_
 149
 150 /**
 151  * Function prototypes for the emitter functions.
 152  * DO NOT EDIT THIS FILE, your changes will be lost.
 153  * Edit $specfile instead.
 154  * created by: $0 $specfile $target_dir
 155  * date:       $creation_time
 156  */
 157
 158 #include "irnode.h"
 159 #include "$arch\_emitter.h"
 160
 161 void $arch\_register_spec_emitters(void);
 162
 163 #endif /* _GEN_$tmp\_EMITTER_H_ */
 164
 165 EOF
 166
 167 close(OUT);
 168
 169 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 170
 171 $creation_time = localtime(time());
 172
 173 print OUT<<EOF;
 174 /**
 175  * Generated functions to emit code for assembler ir nodes.
 176  * DO NOT EDIT THIS FILE, your changes will be lost.
 177  * Edit $specfile instead.
 178  * created by: $0 $specfile $target_dir
 179  * date:       $creation_time
 180  */
 181 #ifdef HAVE_CONFIG_H
 182 #include "config.h"
 183 #endif
 184
 185 #include <stdio.h>
 186
 187 #include "irnode.h"
 188 #include "irop_t.h"
 189 #include "irprog_t.h"
 190
 191 #include "gen_$arch\_emitter.h"
 192 #include "$arch\_new_nodes.h"
 193
 194 EOF
 195
 196 print OUT @obst_func;
 197
 198 print OUT<<EOF;
 199 /**
 200  * Enters the emitter functions for handled nodes into the generic
 201  * pointer of an opcode.
 202  */
 203 void $arch\_register_spec_emitters(void) {
 204
 205 #define BE_EMIT(a) op_$arch\_##a->ops.generic = (op_func)emit_$arch\_##a
 206
 207   /* generated emitter functions */
 208 EOF
 209
 210 print OUT @obst_register;
 211
 212 print OUT<<EOF;
 213
 214 #undef BE_EMIT
 215 }
 216
 217 EOF
 218
 219 close(OUT);