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