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[/] [xgate/] [trunk/] [sw/] [tools/] [misc/] [test_assembler.pl] - Blame information for rev 16

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1 16 rehayes 
#!/usr/bin/perl -w
2 
 
3 
sub test_for_keyword {
4 
  foreach $keyword (@instruction_keyword_list) {
5 
    if ($_[0] eq $keyword) {
6 
      return 1;
7 
    }
8 
  }
9 
  return 0;
10 
}
11 
 
12 
sub print_symbol_table {
13 
  while (($key, $value) = each %symbol_table) {
14 
    print "Symbol Name $key => $value\n";
15 
  }
16 
}
17 
 
18 
sub do_expression {
19 
  print "Do Expersion input = $_[0]\n";
20 
  @expresion = split /([()+-])/, $_[0];
21 
  $converted = 0;
22 
  print "Do Expression - Expresion parts are: @expresion\n";
23 
  $i = 0;
24 
  foreach (@expresion) {
25 
    print "Foreach value is: $_\n";
26 
    s/ *$//g;     # get rid of trailing blanks
27 
    s/^ *//g;     # get rid of all leading blanks
28 
    if (/^\$/) {
29 
      $temp = &hex_to_num;
30 
      $expresion[$i] = $temp;
31 
    } elsif (/^[0-9]/) {
32 
      $temp = &dec_to_num;
33 
      $expresion[$i] = $temp;
34 
    } elsif (/^[a-zA-Z_]/) {
35 
      $temp = &symbol_to_num;
36 
      $expresion[$i] = $temp;
37 
    }
38 
    print "  -- Expression part is: $expresion[$i]\n";
39 
    $i++;
40 
  }
41 
  $converted = @expresion[0];
42 
  print "Final Do Expression is: $converted, expression = @expresion\n";
43 
  return $converted;
44 
}
45 
 
46 
sub hex_to_num {
47 
  my ($i, $temp, $converted);
48 
  s/^\$//;
49 
  $i = 1;
50 
  @chars = split //, $_;
51 
  @chars = reverse @chars;
52 
  $converted = 0;
53 
  foreach $c (@chars) {
54 
    if ($c =~ /[A-F]/) {
55 
      $temp = ord($c) - ord("A") + 10;
56 
    } elsif ($c =~ /[a-f]/) {
57 
      $temp = ord($c) - ord("a") + 10;
58 
    } elsif ($c =~ /[0-9]/) {
59 
      $temp = ord($c) - ord("0");
60 
    } else {
61 
        print "ERROR - in hex number conversion\n";
62 
    }
63 
    $temp = $temp * $i;
64 
    $converted = $converted + $temp;
65 
    $i = $i*16;
66 
  }
67 
  return $converted;
68 
}
69 
 
70 
sub dec_to_num {
71 
  my ($i, $temp, $converted);
72 
  s/^\$//;
73 
  $i = 1;
74 
  @chars = split //, $_;
75 
  @chars = reverse @chars;
76 
  $converted = 0;
77 
  foreach $c (@chars) {
78 
    if ($c =~ /[0-9]/) {
79 
      $temp = ord($c) - ord("0");
80 
    } else {
81 
        print "ERROR - in dec number conversion\n";
82 
    }
83 
    $temp = $temp * $i;
84 
    $converted = $converted + $temp;
85 
    $i = $i*10;
86 
  }
87 
  return $converted;
88 
}
89 
 
90 
sub symbol_to_num {
91 
  my $converted;
92 
  print "Symbol_convert - $_\n";
93 
  $converted = $symbol_table{$_};
94 
  if ($converted =~ /XXX/) {
95 
    print "ERROR - Undefined Symbol Conversion => $_/n";
96 
  }
97 
  return $converted;
98 
}
99 
 
100 
sub print_memory_image {
101 
  $j = 0;
102 
  foreach $i (@memory_image) {
103 
    print "Address $j => $i\n";
104 
    $j++;
105 
  }
106 
}
107 
 
108 
sub reg_to_num {
109 
  my $register = $_;
110 
  if ($register eq "R0") {
111 
      $register = "000";
112 
  } elsif ($register eq "R1") {
113 
      $register = "001";
114 
  } elsif ($register eq "R2") {
115 
      $register = "010";
116 
  } elsif ($register eq "R3") {
117 
      $register = "011";
118 
  } elsif ($register eq "R4") {
119 
      $register = "100";
120 
  } elsif ($register eq "R5") {
121 
      $register = "101";
122 
  } elsif ($register eq "R6") {
123 
      $register = "110";
124 
  } elsif ($register eq "R7") {
125 
      $register = "111";
126 
  } else {
127 
      printf "Bad Register Name: %s\n", $register;
128 
      $register = "";
129 
  }
130 
}
131 
 
132 
sub translate_RD {
133 
  $rd_prototype = "00000???00000000";
134 
  &fill_field($rd_prototype, &reg_to_num($_[0]));
135 
}
136 
 
137 
sub do_compiler_command {
138 
  if ($white_split[0] eq "EQU") {
139 
    shift @white_split;
140 
    print "\nStarting EQU - Symbol = $current_symbol, @white_split\n";
141 
    $junk_temp = &do_expression(@white_split);
142 
    print "Ending EQU - value is $junk_temp\n\n";
143 
    $symbol_table{$current_symbol} = $junk_temp;
144 
  } elsif ($white_split[0] eq "ORG") {
145 
    $program_address = $white_split[1];
146 
    $symbol_table{$current_symbol} = $program_address;
147 
  } elsif ($white_split[0] eq "ALIGN") {
148 
    $program_address = $white_split[1];
149 
    $symbol_table{$current_symbol} = $program_address;
150 
  } elsif ($white_split[0] eq "DW") {
151 
    $symbol_table{$current_symbol} = $program_address;
152 
    $program_address = $program_address + 1;
153 
  } elsif ($white_split[0] eq "DB") {
154 
    $symbol_table{$current_symbol} = $program_address;
155 
    $program_address++;
156 
  } elsif ($white_split[0] eq "FCC") {
157 
    $program_address = $white_split[1];
158 
    $symbol_table{$current_symbol} = $program_address;
159 
  }
160 
}
161 
 
162 
sub do_instruction {
163 
  if ($white_split[0] eq "BRK") {
164 
     $protype_op_code = "0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0";
165 
     $xyzpp = "0000000000000000";
166 
 
167 
  } elsif ($white_split[0] eq "NOP") {
168 
     $protype_op_code =  "0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0";
169 
     $xyzpp = "0000000100000000";
170 
 
171 
  } elsif ($white_split[0] eq "RTS") {
172 
     $protype_op_code =  "0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0";
173 
     $xyzpp = "0000001000000000";
174 
 
175 
  } elsif ($white_split[0] eq "SIF") {
176 
     $protype_op_code =  "0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0";
177 
     $xyzpp = "0000001100000000";
178 
 
179 
  } elsif ($white_split[0] eq "CSEM") {
180 
     $protype_op_code =  "0 0 0 0 0 IMM3 1 1 1 1 0 0 0 0";
181 
     $xyzpp = "00000???11110000";
182 
 
183 
     $protype_op_code =  "0 0 0 0 0 RS 1 1 1 1 0 0 0 1";
184 
     $xyzpp = "00000???11110001";
185 
 
186 
 } elsif ($white_split[0] eq "SSEM") {
187 
     $protype_op_code =  "0 0 0 0 0 IMM3 1 1 1 1 0 0 1 0";
188 
     $xyzpp = "00000???11110010";
189 
 
190 
     $protype_op_code =  "0 0 0 0 0 RS 1 1 1 1 0 0 1 1";
191 
     $xyzpp = "00000???11110011";
192 
 
193 
 
194 
  } elsif ($white_split[0] eq "SEX") {
195 
     $protype_op_code =  "0 0 0 0 0 RD 1 1 1 1 0 1 0 0";
196 
     $xyzpp = "00000???11110100";
197 
 
198 
  } elsif ($white_split[0] eq "PAR") {
199 
     $protype_op_code =  "0 0 0 0 0 RD 1 1 1 1 0 1 0 1";
200 
     $xyzpp = "00000???11110101";
201 
 
202 
  } elsif ($white_split[0] eq "JAL") {
203 
     $protype_op_code =  "0 0 0 0 0 RD 1 1 1 1 0 1 1 0";
204 
     $xyzpp = "00000???11110110";
205 
 
206 
  } elsif ($white_split[0] eq "SIF") {
207 
     $protype_op_code =  "0 0 0 0 0 RS 1 1 1 1 0 1 1 1";
208 
     $xyzpp = "00000???11110111";
209 
 
210 
 
211 
  } elsif ($white_split[0] eq "TFR") {
212 
    # RD,CCR
213 
     $protype_op_code =  "0 0 0 0 0 RD 1 1 1 1 1 0 0 0";
214 
     $xyzpp = "00000???11111000";
215 
 
216 
  } elsif ($white_split[0] eq "TFR") {
217 
    # CCR,RS
218 
     $protype_op_code =  "0 0 0 0 0 RS 1 1 1 1 1 0 0 1";
219 
     $xyzpp = "00000???11111001";
220 
 
221 
  } elsif ($white_split[0] eq "TFR") {
222 
    # RD,PC
223 
     $protype_op_code =  "0 0 0 0 0 RD 1 1 1 1 1 0 1 0";
224 
     $xyzpp = "00000???11111010";
225 
 
226 
 
227 
  } elsif ($white_split[0] eq "BFFO") {
228 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 0 0 0";
229 
     $xyzpp = "00001??????10000";
230 
 
231 
  } elsif ($white_split[0] eq "ASR") {
232 
     $_ = $white_space[2];
233 
     if (/R[0-7]/) {
234 
       $protype_op_code =  "0 0 0 0 1 RD RS 1 0 0 0 1";
235 
       $xyzpp = "00001??????10001";
236 
     } else {
237 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 0 0 1";
238 
     $xyzpp = "00001???????1001";
239 
     }
240 
  } elsif ($white_split[0] eq "CSL") {
241 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 0 1 0";
242 
     $xyzpp = "00001??????10010";
243 
 
244 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 0 1 0";
245 
     $xyzpp = "00001???????1010";
246 
 
247 
  } elsif ($white_split[0] eq "CSR") {
248 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 0 1 1";
249 
     $xyzpp = "00001??????10011";
250 
 
251 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 0 1 1";
252 
     $xyzpp = "00001???????1011";
253 
 
254 
  } elsif ($white_split[0] eq "LSL") {
255 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 1 0 0";
256 
     $xyzpp = "00001??????10100";
257 
 
258 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 1 0 0";
259 
     $xyzpp = "00001???????1100";
260 
 
261 
  } elsif ($white_split[0] eq "LSR") {
262 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 1 0 1";
263 
     $xyzpp = "00001??????10101";
264 
 
265 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 1 0 1";
266 
     $xyzpp = "00001???????1101";
267 
 
268 
  } elsif ($white_split[0] eq "ROL") {
269 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 1 1 0";
270 
     $xyzpp = "00001??????10110";
271 
 
272 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 1 1 0";
273 
     $xyzpp = "00001???????1110";
274 
 
275 
  } elsif ($white_split[0] eq "ROR") {
276 
     $protype_op_code =  "0 0 0 0 1 RD RS 1 0 1 1 1";
277 
     $xyzpp = "00001??????10111";
278 
 
279 
     $protype_op_code =  "0 0 0 0 1 RD IMM4 1 1 1 1";
280 
     $xyzpp = "00001???????1111";
281 
 
282 
  } elsif ($white_split[0] eq "AND") {
283 
     $protype_op_code =  "0 0 0 1 0 RD RS1 RS2 0 0";
284 
     $xyzpp = "00010?????????00";
285 
 
286 
  } elsif ($white_split[0] eq "OR") {
287 
     $protype_op_code =  "0 0 0 1 0 RD RS1 RS2 1 0";
288 
     $xyzpp = "00010?????????10";
289 
 
290 
  } elsif ($white_split[0] eq "XNOR") {
291 
     $protype_op_code =  "0 0 0 1 0 RD RS1 RS2 1 1";
292 
     $xyzpp = "00010?????????11";
293 
 
294 
  } elsif ($white_split[0] eq "SUB") {
295 
     $protype_op_code =  "0 0 0 1 1 RD RS1 RS2 0 0";
296 
     $xyzpp = "00011?????????00";
297 
 
298 
  } elsif ($white_split[0] eq "SBC") {
299 
     $protype_op_code =  "0 0 0 1 1 RD RS1 RS2 0 1";
300 
     $xyzpp = "00011?????????01";
301 
 
302 
  } elsif ($white_split[0] eq "ADD") {
303 
     $protype_op_code =  "0 0 0 1 1 RD RS1 RS2 1 0";
304 
     $xyzpp = "00011?????????10";
305 
 
306 
  } elsif ($white_split[0] eq "ADC") {
307 
     $protype_op_code =  "0 0 0 1 1 RD RS1 RS2 1 1";
308 
     $xyzpp = "00011?????????11";
309 
 
310 
 
311 
  } elsif ($white_split[0] eq "BCC") {
312 
     $protype_op_code =  "0 0 1 0 0 0 0 REL9";
313 
     $xyzpp = "0010000?????????";
314 
 
315 
  } elsif ($white_split[0] eq "BCS") {
316 
     $protype_op_code =  "0 0 1 0 0 0 1 REL9";
317 
     $xyzpp = "0010001?????????";
318 
 
319 
  } elsif ($white_split[0] eq "BNE") {
320 
     $protype_op_code =  "0 0 1 0 0 1 0 REL9";
321 
     $xyzpp = "0010010?????????";
322 
 
323 
  } elsif ($white_split[0] eq "BEQ") {
324 
     $protype_op_code =  "0 0 1 0 0 1 1 REL9";
325 
     $xyzpp = "0010011?????????";
326 
 
327 
  } elsif ($white_split[0] eq "BPL") {
328 
     $protype_op_code =  "0 0 1 0 1 0 0 REL9";
329 
     $xyzpp = "0010100?????????";
330 
 
331 
  } elsif ($white_split[0] eq "BMI") {
332 
     $protype_op_code =  "0 0 1 0 1 0 1 REL9";
333 
     $xyzpp = "0010101?????????";
334 
 
335 
  } elsif ($white_split[0] eq "BVC") {
336 
     $protype_op_code =  "0 0 1 0 1 1 0 REL9";
337 
     $xyzpp = "0010110?????????";
338 
 
339 
  } elsif ($white_split[0] eq "BVS") {
340 
     $protype_op_code =  "0 0 1 0 1 1 1 REL9";
341 
     $xyzpp = "0010111?????????";
342 
 
343 
  } elsif ($white_split[0] eq "BHI") {
344 
     $protype_op_code =  "0 0 1 1 0 0 0 REL9";
345 
     $xyzpp = "0011000?????????";
346 
 
347 
  } elsif ($white_split[0] eq "BLS") {
348 
     $protype_op_code =  "0 0 1 1 0 0 1 REL9";
349 
     $xyzpp = "0011001?????????";
350 
 
351 
  } elsif ($white_split[0] eq "BGE") {
352 
     $protype_op_code =  "0 0 1 1 0 1 0 REL9";
353 
     $xyzpp = "0011010?????????";
354 
 
355 
  } elsif ($white_split[0] eq "BLT") {
356 
     $protype_op_code =  "0 0 1 1 0 1 1 REL9";
357 
     $xyzpp = "0011011?????????";
358 
 
359 
  } elsif ($white_split[0] eq "BGT") {
360 
     $protype_op_code =  "0 0 1 1 1 0 0 REL9";
361 
     $xyzpp = "0011100?????????";
362 
 
363 
  } elsif ($white_split[0] eq "BLE") {
364 
     $protype_op_code =  "0 0 1 1 1 0 1 REL9";
365 
     $xyzpp = "0011101?????????";
366 
 
367 
  } elsif ($white_split[0] eq "BRA") {
368 
     $protype_op_code =  "0 0 1 1 1 1 REL10";
369 
     $xyzpp = "001111??????????";
370 
 
371 
 
372 
  } elsif ($white_split[0] eq "LDB") {
373 
     $_ = $white_space[3];
374 
     if (/\#/) {
375 
       $protype_op_code =  "0 1 0 0 0 RD RB #OFFS5";
376 
       $xyzpp = "01000???????????";
377 
     }
378 
     $protype_op_code =  "0 1 1 0 0 RD RB RI 0 0";
379 
     $xyzpp = "01100?????????00";
380 
 
381 
     $protype_op_code =  "0 1 1 0 0 RD RB RI+ 0 1";
382 
     $xyzpp = "01100?????????01";
383 
 
384 
     $protype_op_code =  "0 1 1 0 0 RD RB -RI 1 0";
385 
     $xyzpp = "01100?????????10";
386 
 
387 
  } elsif ($white_split[0] eq "LDW") {
388 
     $protype_op_code =  "0 1 0 0 1 RD RB #OFFS5";
389 
     $xyzpp = "01001???????????";
390 
 
391 
     $protype_op_code =  "0 1 1 0 1 RD RB RI 0 0";
392 
     $xyzpp = "01101?????????00";
393 
 
394 
     $protype_op_code =  "0 1 1 0 1 RD RB RI+ 0 1";
395 
     $xyzpp = "01101?????????01";
396 
 
397 
     $protype_op_code =  "0 1 1 0 1 RD RB -RI 1 0";
398 
     $xyzpp = "01101?????????10";
399 
 
400 
  } elsif ($white_split[0] eq "STB") {
401 
     $protype_op_code =  "0 1 0 1 0 RS RB #OFFS5";
402 
     $xyzpp = "01010???????????";
403 
 
404 
     $protype_op_code =  "0 1 1 1 0 RS RB RI 0 0";
405 
     $xyzpp = "01110?????????00";
406 
 
407 
     $protype_op_code =  "0 1 1 1 0 RS RB RI+ 0 1";
408 
     $xyzpp = "01110?????????01";
409 
 
410 
     $protype_op_code =  "0 1 1 1 0 RS RB -RI 1 0";
411 
     $xyzpp = "01110?????????10";
412 
 
413 
  } elsif ($white_split[0] eq "STW") {
414 
     $protype_op_code =  "0 1 0 1 1 RS RB #OFFS5";
415 
     $xyzpp = "01011???????????";
416 
 
417 
     $protype_op_code =  "0 1 1 1 1 RS RB RI 0 0";
418 
     $xyzpp = "01111?????????00";
419 
 
420 
     $protype_op_code =  "0 1 1 1 1 RS RB RI+ 0 1";
421 
     $xyzpp = "01111?????????01";
422 
 
423 
     $protype_op_code =  "0 1 1 1 1 RS RB -RI 1 0";
424 
     $xyzpp = "01111?????????10";
425 
 
426 
 
427 
  } elsif ($white_split[0] eq "BFEXT") {
428 
     $protype_op_code =  "0 1 1 0 0 RD RS1 RS2 1 1";
429 
     $xyzpp = "01100?????????11";
430 
 
431 
  } elsif ($white_split[0] eq "BFINS") {
432 
     $protype_op_code =  "0 1 1 0 1 RD RS1 RS2 1 1";
433 
     $xyzpp = "01101?????????11";
434 
 
435 
  } elsif ($white_split[0] eq "BFINSI") {
436 
     $protype_op_code =  "0 1 1 1 0 RD RS1 RS2 1 1";
437 
     $xyzpp = "01110?????????11";
438 
 
439 
  } elsif ($white_split[0] eq "BFINSX") {
440 
     $protype_op_code =  "0 1 1 1 1 RD RS1 RS2 1 1";
441 
     $xyzpp = "01111?????????11";
442 
 
443 
 
444 
  } elsif ($white_split[0] eq "ANDL") {
445 
     $protype_op_code =  "1 0 0 0 0 RD IMM8";
446 
     $xyzpp = "10000???????????";
447 
 
448 
  } elsif ($white_split[0] eq "ANDH") {
449 
     $protype_op_code =  "1 0 0 0 1 RD IMM8";
450 
     $xyzpp = "10001???????????";
451 
 
452 
  } elsif ($white_split[0] eq "BITL") {
453 
     $protype_op_code =  "1 0 0 1 0 RD IMM8";
454 
     $xyzpp = "10010???????????";
455 
 
456 
  } elsif ($white_split[0] eq "BITH") {
457 
     $protype_op_code =  "1 0 0 1 1 RD IMM8";
458 
     $xyzpp = "10011???????????";
459 
 
460 
  } elsif ($white_split[0] eq "ORL") {
461 
     $protype_op_code =  "1 0 1 0 0 RD IMM8";
462 
     $xyzpp = "10100???????????";
463 
 
464 
  } elsif ($white_split[0] eq "ORH") {
465 
     $protype_op_code =  "1 0 1 0 1 RD IMM8";
466 
     $xyzpp = "10101???????????";
467 
 
468 
  } elsif ($white_split[0] eq "XNORL") {
469 
     $protype_op_code =  "1 0 1 1 0 RD IMM8";
470 
     $xyzpp = "10110???????????";
471 
 
472 
  } elsif ($white_split[0] eq "XNORH") {
473 
     $protype_op_code =  "1 0 1 1 1 RD IMM8";
474 
     $xyzpp = "10111???????????";
475 
 
476 
 
477 
  } elsif ($white_split[0] eq "SUBL") {
478 
     $protype_op_code =  "1 1 0 0 0 RD IMM8";
479 
     $xyzpp = "11000???????????";
480 
 
481 
  } elsif ($white_split[0] eq "SUBH") {
482 
     $protype_op_code =  "1 1 0 0 1 RD IMM8";
483 
     $xyzpp = "11001???????????";
484 
 
485 
  } elsif ($white_split[0] eq "CMPL") {
486 
     $protype_op_code =  "1 1 0 1 0 RS IMM8";
487 
     $xyzpp = "11010???????????";
488 
 
489 
  } elsif ($white_split[0] eq "CPCH") {
490 
     $protype_op_code =  "1 1 0 1 1 RS IMM8";
491 
     $xyzpp = "11011???????????";
492 
 
493 
  } elsif ($white_split[0] eq "ADDL") {
494 
     $protype_op_code =  "1 1 1 0 0 RD IMM8";
495 
     $xyzpp = "11100???????????";
496 
 
497 
  } elsif ($white_split[0] eq "ADDH") {
498 
     $protype_op_code =  "1 1 1 0 1 RD IMM8";
499 
     $xyzpp = "11101???????????";
500 
 
501 
  } elsif ($white_split[0] eq "LDL") {
502 
     $protype_op_code =  "1 1 1 1 0 RD IMM8";
503 
     $xyzpp = "11110???????????";
504 
 
505 
  } elsif ($white_split[0] eq "LDH") {
506 
     $protype_op_code =  "1 1 1 1 1 RD IMM8";
507 
     $xyzpp = "11111???????????";
508 
  }
509 
 
510 
  $memory_image[$program_address] = $xyzpp;
511 
  $program_address = $program_address + 1;
512 
}
513 
 
514 
################################################################################
515 
# Main
516 
################################################################################
517 
 
518 
if( @ARGV < 1 ) {
519 
  $progname = `basename $0`;
520 
  chomp($progname);
521 
  print "Syntax: $progname <Infile> <Outfile>\n";
522 
  die;
523 
} elsif ( @ARGV < 2 ) {
524 
  print "Using default output file \"temp.v\"\n";
525 
  $Infile = shift @ARGV;
526 
  $Outfile = 'temp.v';
527 
} else {
528 
  $Infile = shift @ARGV;
529 
  $Outfile = shift @ARGV;
530 
}
531 
 
532 
open( source_file,  "<$Infile" )  || die "Could not open Input file";
533 
open( verilog_file, ">$Outfile" ) || die "Could not open Output file";
534 
 
535 
$source_line_number = 1;
536 
$program_address = 0;
537 
$cpu_type = "";
538 
@memory_image = "";
539 
@instruction_keyword_list = qw/ CPU ALIGN ORG EQU DW DB FCC /;
540 
push @instruction_keyword_list, qw/ BRK NOP RTS SIF CSEM SSEM SEX PAR /;
541 
push @instruction_keyword_list, qw/ JAL SIF TFR BFFO ASR CSL CSR LSL LSR /;
542 
push @instruction_keyword_list, qw/ ROL ROR AND OR XNOR SUB SBC ADD BCC BCS /;
543 
push @instruction_keyword_list, qw/ BNE BEQ BPL BMI BVC BVS BHI BLS BGE BLT /;
544 
push @instruction_keyword_list, qw/ BGT BLE BRA LDB LDW STB STW BFEXT BFINS /;
545 
push @instruction_keyword_list, qw/ BFINSI BFINSX ANDL ANDH BITL BITH ORL /;
546 
push @instruction_keyword_list, qw/ ORH XNORL XNORH SUBL SUBH CMPL CPCH /;
547 
push @instruction_keyword_list, qw/ ADDL ADDH LDL LDH /;
548 
 
549 
while (<source_file>) {
550 
  chomp;
551 
  s/;.*$//g;    # get rid of everything after ;
552 
  s/ *$//g;     # get rid of trailing blanks
553 
  s/^ *//g;     # get rid of all leading blanks
554 
  if ($_) {
555 
    print "Instruction Line = $_  number = $source_line_number\n";
556 
    #@white_split = split; # Breakout fields on white space
557 
    @white_split = split /\s+|,/; # Breakout fields on white space or ,
558 
    $i = 0;
559 
    foreach (@white_split) {
560 
      s/\(R/R/;                   # Remove leading "(" if it is part of Register name
561 
      s/\)\)/\)/;                 # Take of one of ")" of double "))"
562 
      if (/^\$/) {                # Take care of the simple case of a hex number
563 
        $white_split[$i] = &hex_to_num($white_split[$i]);
564 
      }
565 
      if (/^[0-9]/) {             # Take care of the simple case of a dec number
566 
        $white_split[$i] = &dec_to_num($white_split[$i]);
567 
      }
568 
      $i++;
569 
    }
570 
    if (! &test_for_keyword($white_split[0])) {  # Line starts with a symbol name
571 
      $current_symbol = $white_split[0];
572 
      if ($symbol_table{$current_symbol}) {
573 
        print "Error Reused Symbol - $current_symbol - Source Line Number $source_line_number\n";
574 
      } else {
575 
        $symbol_table{$current_symbol} = "XXX"; # initilize to junk
576 
      }
577 
      shift @white_split;
578 
    }
579 
    if (! @white_split) {  # The only thing in the line was a symbol
580 
      $symbol_table{$current_symbol} = $program_address;
581 
    } else {
582 
      &do_compiler_command(@white_split);
583 
      &do_instruction;
584 
    }
585 
  }
586 
  $source_line_number++;
587 
}
588 
 
589 
&print_symbol_table;
590 
&print_memory_image;
591 
 
592 
close( source_file );
593 
close( verilog_file );
594 
 

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