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