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 our $new_emit_syntax = 0;
  20
  21 # include spec file
  22
  23 my $return;
  24
  25 no strict "subs";
  26 unless ($return = do $specfile) {
  27         warn "couldn't parse $specfile: $@" if $@;
  28         warn "couldn't do $specfile: $!"    unless defined $return;
  29         warn "couldn't run $specfile"       unless $return;
  30 }
  31 use strict "subs";
  32
  33 if ($new_emit_syntax) {
  34         do "generate_emitter_new.pl";
  35         return;
  36 }
  37
  38 my $comment_string_quoted = quotemeta($comment_string);
  39
  40 my $target_c = $target_dir."/gen_".$arch."_emitter.c";
  41 my $target_h = $target_dir."/gen_".$arch."_emitter.h";
  42
  43 # stacks for output
  44 my @obst_func;   # stack for the emit functions
  45 my @obst_register;  # stack for emitter register code
  46 my $line;
  47
  48 foreach my $op (keys(%nodes)) {
  49         my %n = %{ $nodes{"$op"} };
  50
  51         # skip this node description if no emit information is available
  52         next if (!defined($n{"emit"}));
  53
  54         $line = "static void emit_".$arch."_".$op."(const ir_node *n, $arch\_emit_env_t *env)";
  55
  56         push(@obst_register, "  BE_EMIT($op);\n");
  57
  58         if($n{"emit"} eq "") {
  59                 push(@obst_func, $line." {\n");
  60                 push(@obst_func, "}\n\n");
  61                 next;
  62         }
  63
  64         push(@obst_func, $line." {\n  FILE *F = env->out;\n");
  65         push(@obst_func, "  char cmd_buf[256], cmnt_buf[256];\n");
  66         push(@obst_func, "  const lc_arg_env_t *arg_env = $arch\_get_arg_env();\n\n");
  67         my @emit = split(/\n/, $n{"emit"});
  68
  69         foreach my $template (@emit) {
  70                 # substitute only lines, starting with a '.'
  71                 if ($template =~ /^(\d*)\.\s*/) {
  72                         my $indent = "  "; # default indent is 2 spaces
  73
  74                         $indent = " " x $1 if ($1 && $1 > 0);
  75                         # remove indent, dot and trailing spaces
  76                         $template =~ s/^\d*\.\s*//;
  77                         my $fmt = $template;
  78                         my $cnt = 0;
  79                         my $buf = 'cmd_buf';
  80
  81                         push(@obst_func, $indent."cmnt_buf[0] = '\\0';\n");
  82                         foreach $template (split(/$comment_string_quoted/, $fmt, 2)) {
  83                                 my @params;
  84                                 my $res = "";
  85                                 $cnt++;
  86
  87                                 $template =~ s/(\\t)*$//;
  88
  89                                 if ($cnt == 2) {
  90                                         # add the comment begin string
  91                                         $res .= $comment_string;
  92                                         $buf  = "cmnt_buf";
  93                                 }
  94
  95                                 # substitute all format parameter
  96                                 while ($template =~ /(\%\%)|\%([ASDX])(\d)|\%([COM])|\%(\w+)/) {
  97                                         $res  .= $`;      # get everything before the match
  98
  99                                         if ($1) {
 100                                                 $res .= "%%";
 101                                         }
 102                                         elsif ($2 && $2 eq "S") {
 103                                                 push(@params, "n");
 104                                                 $res .= "%".$3."S"; # substitute %Sx with %xS
 105                                         }
 106                                         elsif ($2 && $2 eq "D") {
 107                                                 push(@params, "n");
 108                                                 $res .= "%".$3."D"; # substitute %Dx with %xD
 109                                         }
 110                                         elsif ($2 && $2 eq "X") {
 111                                                 push(@params, "n");
 112                                                 $res .= "%".$3."X"; # substitute %Xx with %xX
 113                                         }
 114                                         elsif ($2 && $2 eq "A") {
 115                                                 push(@params, "get_irn_n(n, ".($3 - 1).")");
 116                                                 $res .= "%+F";
 117                                         }
 118                                         elsif ($4) {
 119                                                 push(@params, "n");
 120                                                 $res .= "%".$4;
 121                                         }
 122                                         elsif ($5) {  # backend provided function to call, has to return a string
 123                                                 push(@params, $5."(n, env)");
 124                                                 $res .= "\%s";
 125                                         }
 126
 127                                         $template = $'; # scan everything after the match
 128                                 }
 129                                 $res .= $template; # get the remaining string
 130
 131                                 my $parm = "";
 132                                 $parm = ", ".join(", ", @params) if (@params);
 133
 134                                 push(@obst_func, $indent.'lc_esnprintf(arg_env, '.$buf.', 256, "'.$res.'"'.$parm.');'."\n");
 135                         }
 136                         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");
 137                 }
 138                 else {
 139                         push(@obst_func, $template,"\n");
 140                 }
 141         }
 142
 143         push(@obst_func, "}\n\n");
 144 }
 145
 146 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 147
 148 my $creation_time = localtime(time());
 149
 150 my $tmp = uc($arch);
 151
 152 print OUT<<EOF;
 153 #ifndef _GEN_$tmp\_EMITTER_H_
 154 #define _GEN_$tmp\_EMITTER_H_
 155
 156 /**
 157  * Function prototypes for the emitter functions.
 158  * DO NOT EDIT THIS FILE, your changes will be lost.
 159  * Edit $specfile instead.
 160  * created by: $0 $specfile $target_dir
 161  * date:       $creation_time
 162  */
 163
 164 #include "irnode.h"
 165 #include "$arch\_emitter.h"
 166
 167 void $arch\_register_spec_emitters(void);
 168
 169 #endif /* _GEN_$tmp\_EMITTER_H_ */
 170
 171 EOF
 172
 173 close(OUT);
 174
 175 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 176
 177 $creation_time = localtime(time());
 178
 179 print OUT<<EOF;
 180 /**
 181  * Generated functions to emit code for assembler ir nodes.
 182  * DO NOT EDIT THIS FILE, your changes will be lost.
 183  * Edit $specfile instead.
 184  * created by: $0 $specfile $target_dir
 185  * date:       $creation_time
 186  */
 187 #ifdef HAVE_CONFIG_H
 188 #include "config.h"
 189 #endif
 190
 191 #include <stdio.h>
 192
 193 #include "irnode.h"
 194 #include "irop_t.h"
 195 #include "irprog_t.h"
 196
 197 #include "gen_$arch\_emitter.h"
 198 #include "$arch\_new_nodes.h"
 199
 200 EOF
 201
 202 print OUT @obst_func;
 203
 204 print OUT<<EOF;
 205 /**
 206  * Enters the emitter functions for handled nodes into the generic
 207  * pointer of an opcode.
 208  */
 209 void $arch\_register_spec_emitters(void) {
 210
 211 #define BE_EMIT(a) op_$arch\_##a->ops.generic = (op_func)emit_$arch\_##a
 212
 213   /* generated emitter functions */
 214 EOF
 215
 216 print OUT @obst_register;
 217
 218 print OUT<<EOF;
 219
 220 #undef BE_EMIT
 221 }
 222
 223 EOF
 224
 225 close(OUT);