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 (!$n{"emit"} || length($n{"emit"}) < 1);
  47
  48         $line = "static void emit_".$arch."_".$op."(const ir_node *n, $arch\_emit_env_t *env)";
  49         push(@obst_func, $line." {\n  FILE *F = env->out;\n");
  50         push(@obst_func, "  char cmd_buf[256], cmnt_buf[256];\n");
  51         push(@obst_func, "  const lc_arg_env_t *arg_env = $arch\_get_arg_env();\n\n");
  52         push(@obst_register, "  BE_EMIT($op);\n");
  53
  54         my @emit = split(/\n/, $n{"emit"});
  55
  56         foreach my $template (@emit) {
  57                 # substitute only lines, starting with a '.'
  58                 if ($template =~ /^(\d*)\.\s*/) {
  59                         my $indent = "  "; # default indent is 2 spaces
  60
  61                         $indent = " " x $1 if ($1 && $1 > 0);
  62                         # remove indent, dot and trailing spaces
  63                         $template =~ s/^\d*\.\s*//;
  64                         my $fmt = $template;
  65                         my $cnt = 0;
  66                         my $buf = 'cmd_buf';
  67
  68                         push(@obst_func, $indent."cmnt_buf[0] = '\\0';\n");
  69                         foreach $template (split(/$comment_string_quoted/, $fmt, 2)) {
  70                                 my @params;
  71                                 my $res = "";
  72                                 $cnt++;
  73
  74                                 $template =~ s/(\\t)*$//;
  75
  76                                 if ($cnt == 2) {
  77                                         # add the comment begin string
  78                                         $res .= $comment_string;
  79                                         $buf  = "cmnt_buf";
  80                                 }
  81
  82                                 # substitute all format parameter
  83                                 while ($template =~ /(\%\%)|\%([ASDX])(\d)|\%([COM])|\%(\w+)/) {
  84                                         $res  .= $`;      # get everything before the match
  85
  86                                         if ($1) {
  87                                                 $res .= "%%";
  88                                         }
  89                                         elsif ($2 && $2 eq "S") {
  90                                                 push(@params, "n");
  91                                                 $res .= "%".$3."S"; # substitute %Sx with %xS
  92                                         }
  93                                         elsif ($2 && $2 eq "D") {
  94                                                 push(@params, "n");
  95                                                 $res .= "%".$3."D"; # substitute %Dx with %xD
  96                                         }
  97                                         elsif ($2 && $2 eq "X") {
  98                                                 push(@params, "n");
  99                                                 $res .= "%".$3."X"; # substitute %Xx with %xX
 100                                         }
 101                                         elsif ($2 && $2 eq "A") {
 102                                                 push(@params, "get_irn_n(n, ".($3 - 1).")");
 103                                                 $res .= "%+F";
 104                                         }
 105                                         elsif ($4) {
 106                                                 push(@params, "n");
 107                                                 $res .= "%".$4;
 108                                         }
 109                                         elsif ($5) {  # backend provided function to call, has to return a string
 110                                                 push(@params, $5."(n, env)");
 111                                                 $res .= "\%s";
 112                                         }
 113
 114                                         $template = $'; # scan everything after the match
 115                                 }
 116                                 $res .= $template; # get the remaining string
 117
 118                                 my $parm = "";
 119                                 $parm = ", ".join(", ", @params) if (@params);
 120
 121                                 push(@obst_func, $indent.'lc_esnprintf(arg_env, '.$buf.', 256, "'.$res.'"'.$parm.');'."\n");
 122                         }
 123                         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");
 124                 }
 125                 else {
 126                         push(@obst_func, $template,"\n");
 127                 }
 128         }
 129
 130         push(@obst_func, "}\n\n");
 131 }
 132
 133 open(OUT, ">$target_h") || die("Could not open $target_h, reason: $!\n");
 134
 135 my $creation_time = localtime(time());
 136
 137 my $tmp = uc($arch);
 138
 139 print OUT<<EOF;
 140 #ifndef _GEN_$tmp\_EMITTER_H_
 141 #define _GEN_$tmp\_EMITTER_H_
 142
 143 /**
 144  * Function prototypes for the emitter functions.
 145  * DO NOT EDIT THIS FILE, your changes will be lost.
 146  * Edit $specfile instead.
 147  * created by: $0 $specfile $target_dir
 148  * date:       $creation_time
 149  */
 150
 151 #include "irnode.h"
 152 #include "$arch\_emitter.h"
 153
 154 void $arch\_register_spec_emitters(void);
 155
 156 #endif /* _GEN_$tmp\_EMITTER_H_ */
 157
 158 EOF
 159
 160 close(OUT);
 161
 162 open(OUT, ">$target_c") || die("Could not open $target_c, reason: $!\n");
 163
 164 $creation_time = localtime(time());
 165
 166 print OUT<<EOF;
 167 /**
 168  * Generated functions to emit code for assembler ir nodes.
 169  * DO NOT EDIT THIS FILE, your changes will be lost.
 170  * Edit $specfile instead.
 171  * created by: $0 $specfile $target_dir
 172  * date:       $creation_time
 173  */
 174 #ifdef HAVE_CONFIG_H
 175 #include "config.h"
 176 #endif
 177
 178 #include <stdio.h>
 179
 180 #include "irnode.h"
 181 #include "irop_t.h"
 182 #include "irprog_t.h"
 183
 184 #include "gen_$arch\_emitter.h"
 185 #include "$arch\_new_nodes.h"
 186
 187 EOF
 188
 189 print OUT @obst_func;
 190
 191 print OUT<<EOF;
 192 /**
 193  * Enters the emitter functions for handled nodes into the generic
 194  * pointer of an opcode.
 195  */
 196 void $arch\_register_spec_emitters(void) {
 197
 198 #define BE_EMIT(a) op_$arch\_##a->ops.generic = (op_func)emit_$arch\_##a
 199
 200   /* generated emitter functions */
 201 EOF
 202
 203 print OUT @obst_register;
 204
 205 print OUT<<EOF;
 206
 207 #undef BE_EMIT
 208 }
 209
 210 EOF
 211
 212 close(OUT);