aboutsummaryrefslogtreecommitdiff
path: root/gas/config/tc-w65.c
blob: 690bf506518509cc8759179f48d9d10d661be87d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
/* tc-w65.c -- Assemble code for the W65816
   Copyright 1995, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   GAS is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

/* Written By Steve Chamberlain <sac@cygnus.com>.  */

#include <stdio.h>
#include "as.h"
#include "bfd.h"
#include "subsegs.h"
#define DEFINE_TABLE
#include "../opcodes/w65-opc.h"

const char comment_chars[] = "!";
const char line_separator_chars[] = ";";
const char line_comment_chars[] = "!#";

/* This table describes all the machine specific pseudo-ops the assembler
   has to support.  The fields are:

   pseudo-op name without dot
   function to call to execute this pseudo-op
   Integer arg to pass to the function  */

#define OP_BCC	0x90
#define OP_BCS	0xB0
#define OP_BEQ	0xF0
#define OP_BMI	0x30
#define OP_BNE	0xD0
#define OP_BPL	0x10
#define OP_BRA	0x80
#define OP_BRL	0x82
#define OP_BVC	0x50
#define OP_BVS	0x70

void s_longa ();

const pseudo_typeS md_pseudo_table[] = {
  {"int", cons, 2},
  {"word", cons, 2},
  {"longa", s_longa, 0},
  {"longi", s_longa, 1},
  {0, 0, 0}
};

void cons ();
void s_align_bytes ();

#if 0
int md_reloc_size;
#endif

static int relax;		/* set if -relax seen */

const char EXP_CHARS[] = "eE";

/* Chars that mean this number is a floating point constant.  */
/* As in 0f12.456 */
/* or    0d1.2345e12 */
const char FLT_CHARS[] = "rRsSfFdDxXpP";

/* Opcode mnemonics */
static struct hash_control *opcode_hash_control;

int M;				/* M flag */
int X;				/* X flag */

#define C(a,b) ENCODE_RELAX(a,b)
#define ENCODE_RELAX(what,length) (((what) << 2) + (length))

#define GET_WHAT(x) ((x>>2))

#define BYTE_DISP 1
#define WORD_DISP 2
#define UNDEF_BYTE_DISP 0
#define UNDEF_WORD_DISP 3

#define COND_BRANCH 	1
#define UNCOND_BRANCH   2
#define END 	3

#define BYTE_F 127		/* How far we can branch forwards */
#define BYTE_B -126		/* How far we can branch backwards */
#define WORD_F 32767
#define WORD_B 32768

relax_typeS md_relax_table[C (END, 0)] = {
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },
  { 0, 0, 0, 0 },

  /* COND_BRANCH */
  { 0,       0,       0,  0 },				/* UNDEF_BYTE_DISP */
  { BYTE_F,  BYTE_B,  2,  C (COND_BRANCH, WORD_DISP) },	/* BYTE_DISP */
  { WORD_F,  WORD_B,  5,  0 },				/* WORD_DISP */
  { 0,       0,       5,  0 },				/* UNDEF_WORD_DISP */

  /* UNCOND_BRANCH */
  { 0,       0,       0,  0 },				  /* UNDEF_BYTE_DISP */
  { BYTE_F,  BYTE_B,  2,  C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */
  { WORD_F,  WORD_B,  3,  0 },				  /* WORD_DISP */
  { 0,       0,       3,  0 }				  /* UNDEF_WORD_DISP */

};

/* This function is called once, at assembler startup time.  This
   should set up all the tables, etc that the MD part of the assembler
   needs.  */

void
s_longa (xmode)
{
  int *p = xmode ? &X : &M;
  while (*input_line_pointer == ' ')
    input_line_pointer++;
  if (strncmp (input_line_pointer, "on", 2) == 0)
    {
      input_line_pointer += 2;
      *p = 0;
    }
  else if (strncmp (input_line_pointer, "off", 3) == 0)
    {
      *p = 1;
      input_line_pointer += 3;
    }
  else
    as_bad (_("need on or off."));
  demand_empty_rest_of_line ();
}

void
md_begin ()
{
  struct opinfo *opcode;
  char *prev_name = "";

  opcode_hash_control = hash_new ();

  /* Insert unique names into hash table.  */
  for (opcode = optable; opcode->name; opcode++)
    {
      if (strcmp (prev_name, opcode->name))
	{
	  prev_name = opcode->name;
	  hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
	}
      else
	{
	  /* Make all the opcodes with the same name point to the same
	     string.  */
	  opcode->name = prev_name;
	}
    }

  flag_signed_overflow_ok = 1;
}

static expressionS immediate;	/* absolute expression */
static expressionS immediate1;	/* absolute expression */

static symbolS *
dot ()
{
  const char *fake;

  /* JF: '.' is pseudo symbol with value of current location
     in current segment.  */
  fake = FAKE_LABEL_NAME;
  return symbol_new (fake,
		     now_seg,
		     (valueT) frag_now_fix (),
		     frag_now);

}

int expr_size;
int expr_shift;
int tc_cons_reloc;

void
w65_expression (dest, bytes)
     expressionS *dest;
     unsigned int bytes;
{
  expr_size = 0;
  expr_shift = 0;
  tc_cons_reloc = 0;
  while (*input_line_pointer == ' ')
    input_line_pointer++;

  if (*input_line_pointer == '<')
    {
      expr_size = 1;
      input_line_pointer++;
    }
  else if (*input_line_pointer == '>')
    {
      expr_shift = 1;
      input_line_pointer++;
    }
  else if (*input_line_pointer == '^')
    {
      expr_shift = 2;
      input_line_pointer++;
    }

  expr (0, dest);
}

int amode;

static char *
parse_exp (s, bytes)
     char *s;
     int bytes;
{
  char *save;
  char *new;

  save = input_line_pointer;
  input_line_pointer = s;
  w65_expression (&immediate, bytes);
  if (immediate.X_op == O_absent)
    as_bad (_("missing operand"));
  new = input_line_pointer;
  input_line_pointer = save;
  return new;
}

static char *
get_operands (info, ptr)
     struct opinfo *info;
     char *ptr;
{
  register int override_len = 0;
  register int bytes = 0;

  while (*ptr == ' ')
    ptr++;

  if (ptr[0] == '#')
    {
      ptr++;
      switch (info->amode)
	{
	case ADDR_IMMTOI:
	  bytes = X ? 1 : 2;
	  amode = ADDR_IMMTOI;
	  break;
	case ADDR_IMMTOA:
	  bytes = M ? 1 : 2;
	  amode = ADDR_IMMTOA;
	  break;
	case ADDR_IMMCOP:
	  bytes = 1;
	  amode = ADDR_IMMCOP;
	  break;
	case ADDR_DIR:
	  bytes = 2;
	  amode = ADDR_ABS;
	  break;
	default:
	  abort ();
	  break;
	}
      ptr = parse_exp (ptr);
    }
  else if (ptr[0] == '!')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',')
	{
	  if (ptr[1] == 'y')
	    {
	      amode = ADDR_ABS_IDX_Y;
	      bytes = 2;
	      ptr += 2;
	    }
	  else if (ptr[1] == 'x')
	    {
	      amode = ADDR_ABS_IDX_X;
	      bytes = 2;
	      ptr += 2;
	    }
	  else
	    {
	      as_bad (_("syntax error after <exp"));
	    }
	}
      else
	{
	  amode = ADDR_ABS;
	  bytes = 2;
	}
    }
  else if (ptr[0] == '>')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',' && ptr[1] == 'x')
	{
	  amode = ADDR_ABS_LONG_IDX_X;
	  bytes = 3;
	  ptr += 2;
	}
      else
	{
	  amode = ADDR_ABS_LONG;
	  bytes = 3;
	}
    }
  else if (ptr[0] == '<')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ',')
	{
	  if (ptr[1] == 'y')
	    {
	      amode = ADDR_DIR_IDX_Y;
	      ptr += 2;
	      bytes = 2;
	    }
	  else if (ptr[1] == 'x')
	    {
	      amode = ADDR_DIR_IDX_X;
	      ptr += 2;
	      bytes = 2;
	    }
	  else
	    {
	      as_bad (_("syntax error after <exp"));
	    }
	}
      else
	{
	  amode = ADDR_DIR;
	  bytes = 1;
	}
    }
  else if (ptr[0] == 'a')
    {
      amode = ADDR_ACC;
    }
  else if (ptr[0] == '(')
    {
      /* Look for (exp),y
	 (<exp),y
	 (exp,x)
	 (<exp,x)
	 (exp)
	 (!exp)
	 (exp)
	 (<exp)
	 (exp,x)
	 (!exp,x)
	 (exp,s)
	 (exp,s),y */

      ptr++;
      if (ptr[0] == '<')
	{
	  override_len = 1;
	  ptr++;
	}
      else if (ptr[0] == '!')
	{
	  override_len = 2;
	  ptr++;
	}
      else if (ptr[0] == '>')
	{
	  override_len = 3;
	  ptr++;
	}
      else
	{
	  override_len = 0;
	}
      ptr = parse_exp (ptr);

      if (ptr[0] == ',')
	{
	  ptr++;
	  if (ptr[0] == 'x' && ptr[1] == ')')
	    {
	      ptr += 2;

	      if (override_len == 1)
		{
		  amode = ADDR_DIR_IDX_IND_X;
		  bytes = 2;
		}
	      else
		{
		  amode = ADDR_ABS_IND_IDX;
		  bytes = 2;
		}
	    }
	  else if (ptr[0] == 's' && ptr[1] == ')'
		   && ptr[2] == ',' && ptr[3] == 'y')
	    {
	      amode = ADDR_STACK_REL_INDX_IDX;
	      bytes = 1;
	      ptr += 4;
	    }
	}
      else if (ptr[0] == ')')
	{
	  if (ptr[1] == ',' && ptr[2] == 'y')
	    {
	      amode = ADDR_DIR_IND_IDX_Y;
	      ptr += 3;
	      bytes = 2;
	    }
	  else
	    {
	      if (override_len == 1)
		{
		  amode = ADDR_DIR_IND;
		  bytes = 1;
		}
	      else
		{
		  amode = ADDR_ABS_IND;
		  bytes = 2;
		}
	      ptr++;

	    }
	}
    }
  else if (ptr[0] == '[')
    {
      ptr = parse_exp (ptr + 1);
      if (ptr[0] == ']')
	{
	  ptr++;
	  if (ptr[0] == ',' && ptr[1] == 'y')
	    {
	      bytes = 1;
	      amode = ADDR_DIR_IND_IDX_Y_LONG;
	      ptr += 2;
	    }
	  else
	    {
	      if (info->code == O_jmp)
		{
		  bytes = 2;
		  amode = ADDR_ABS_IND_LONG;
		}
	      else
		{
		  bytes = 1;
		  amode = ADDR_DIR_IND_LONG;
		}
	    }
	}
    }
  else
    {
      ptr = parse_exp (ptr, 2);
      if (ptr[0] == ',')
	{
	  if (ptr[1] == 'y')
	    {
	      if (override_len == 1)
		{
		  bytes = 1;
		  amode = ADDR_DIR_IDX_Y;
		}
	      else
		{
		  amode = ADDR_ABS_IDX_Y;
		  bytes = 2;
		}
	      ptr += 2;
	    }
	  else if (ptr[1] == 'x')
	    {
	      if (override_len == 1)
		{
		  amode = ADDR_DIR_IDX_X;
		  bytes = 1;
		}
	      else
		{
		  amode = ADDR_ABS_IDX_X;
		  bytes = 2;
		}
	      ptr += 2;
	    }
	  else if (ptr[1] == 's')
	    {
	      bytes = 1;
	      amode = ADDR_STACK_REL;
	      ptr += 2;
	    }
	  else
	    {
	      bytes = 1;
	      immediate1 = immediate;
	      ptr = parse_exp (ptr + 1);
	      amode = ADDR_BLOCK_MOVE;
	    }
	}
      else
	{
	  switch (info->amode)
	    {
	    case ADDR_PC_REL:
	      amode = ADDR_PC_REL;
	      bytes = 1;
	      break;
	    case ADDR_PC_REL_LONG:
	      amode = ADDR_PC_REL_LONG;
	      bytes = 2;
	      break;
	    default:
	      if (override_len == 1)
		{
		  amode = ADDR_DIR;
		  bytes = 1;
		}
	      else if (override_len == 3)
		{
		  bytes = 3;
		  amode = ADDR_ABS_LONG;
		}
	      else
		{
		  amode = ADDR_ABS;
		  bytes = 2;
		}
	    }
	}
    }

  switch (bytes)
    {
    case 1:
      switch (expr_shift)
	{
	case 0:
	  if (amode == ADDR_DIR)
	    tc_cons_reloc = R_W65_DP;
	  else
	    tc_cons_reloc = R_W65_ABS8;
	  break;
	case 1:
	  tc_cons_reloc = R_W65_ABS8S8;
	  break;
	case 2:
	  tc_cons_reloc = R_W65_ABS8S16;
	  break;
	}
      break;
    case 2:
      switch (expr_shift)
	{
	case 0:
	  tc_cons_reloc = R_W65_ABS16;
	  break;
	case 1:
	  tc_cons_reloc = R_W65_ABS16S8;
	  break;
	case 2:
	  tc_cons_reloc = R_W65_ABS16S16;
	  break;
	}
    }
  return ptr;
}

/* Passed a pointer to a list of opcodes which use different
   addressing modes, return the opcode which matches the opcodes
   provided.  */

static struct opinfo *
get_specific (opcode)
     struct opinfo *opcode;
{
  int ocode = opcode->code;

  for (; opcode->code == ocode; opcode++)
    {
      if (opcode->amode == amode)
	return opcode;
    }
  return 0;
}

int
check (operand, low, high)
     expressionS *operand;
     int low;
     int high;
{
  if (operand->X_op != O_constant
      || operand->X_add_number < low
      || operand->X_add_number > high)
    {
      as_bad ("operand must be absolute in range %d..%d", low, high);
    }
  return operand->X_add_number;
}

static int log2[] = { 0, 0, 1, 0, 2 };

/* Now we know what sort of opcodes it is, let's build the bytes.  */

static void
build_Mytes (opcode)
     struct opinfo *opcode;
{
  int size;
  int type;
  int pcrel;
  char *output;

  if (opcode->amode == ADDR_IMPLIED)
    {
      output = frag_more (1);
    }
  else if (opcode->amode == ADDR_PC_REL)
    {
      int type;

      /* This is a relaxable insn, so we do some special handling.  */
      type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH;
      output = frag_var (rs_machine_dependent,
			 md_relax_table[C (type, WORD_DISP)].rlx_length,
			 md_relax_table[C (type, BYTE_DISP)].rlx_length,
			 C (type, UNDEF_BYTE_DISP),
			 immediate.X_add_symbol,
			 immediate.X_add_number,
			 0);
    }
  else
    {
      switch (opcode->amode)
	{
	  GETINFO (size, type, pcrel);
	}

      /* If something special was done in the expression modify the
	 reloc type.  */
      if (tc_cons_reloc)
	type = tc_cons_reloc;

      /* 1 byte for the opcode + the bytes for the addrmode.  */
      output = frag_more (size + 1);

      if (opcode->amode == ADDR_BLOCK_MOVE)
	{
	  /* Two relocs for this one.  */
	  fix_new_exp (frag_now,
		       output + 1 - frag_now->fr_literal,
		       1,
		       &immediate,
		       0,
		       R_W65_ABS8S16);

	  fix_new_exp (frag_now,
		       output + 2 - frag_now->fr_literal,
		       1,
		       &immediate1,
		       0,
		       R_W65_ABS8S16);
	}
      else if (type >= 0
	       && opcode->amode != ADDR_IMPLIED
	       && opcode->amode != ADDR_ACC
	       && opcode->amode != ADDR_STACK)
	{
	  fix_new_exp (frag_now,
		       output + 1 - frag_now->fr_literal,
		       size,
		       &immediate,
		       pcrel,
		       type);
	}
    }
  output[0] = opcode->val;
}

/* This is the guts of the machine-dependent assembler.  STR points to
   a machine dependent instruction.  This function is supposed to emit
   the frags/bytes it assembles to.  */

void
md_assemble (str)
     char *str;
{
  unsigned char *op_start;
  unsigned char *op_end;
  struct opinfo *opcode;
  char name[20];
  int nlen = 0;
  char *p;

  /* Drop leading whitespace */
  while (*str == ' ')
    str++;

  /* all opcodes are three letters */
  name[0] = str[0];
  name[1] = str[1];
  name[2] = str[2];
  name[3] = 0;

  tc_cons_reloc = 0;
  str += 3;
  opcode = (struct opinfo *) hash_find (opcode_hash_control, name);

  if (opcode == NULL)
    {
      as_bad (_("unknown opcode"));
      return;
    }

  if (opcode->amode != ADDR_IMPLIED
      && opcode->amode != ADDR_STACK)
    {
      get_operands (opcode, str);
      opcode = get_specific (opcode);
    }

  if (opcode == 0)
    {
      /* Couldn't find an opcode which matched the operands.  */

      char *where = frag_more (1);

      where[0] = 0x0;
      where[1] = 0x0;
      as_bad (_("invalid operands for opcode"));
      return;
    }

  build_Mytes (opcode);
}

void
tc_crawl_symbol_chain (headers)
     object_headers *headers;
{
  printf (_("call to tc_crawl_symbol_chain \n"));
}

symbolS *
md_undefined_symbol (name)
     char *name;
{
  return 0;
}

void
tc_headers_hook (headers)
     object_headers *headers;
{
  printf (_("call to tc_headers_hook \n"));
}

/* Various routines to kill one day.  */
/* Equal to MAX_PRECISION in atof-ieee.c.  */
#define MAX_LITTLENUMS 6

/* Turn a string in input_line_pointer into a floating point constant
   of type TYPE, and store the appropriate bytes in *LITP.  The number
   of LITTLENUMS emitted is stored in *SIZEP.  An error message is
   returned, or NULL on OK.  */

char *
md_atof (type, litP, sizeP)
     char type;
     char *litP;
     int *sizeP;
{
  int prec;
  LITTLENUM_TYPE words[MAX_LITTLENUMS];
  LITTLENUM_TYPE *wordP;
  char *t;
  char *atof_ieee ();

  switch (type)
    {
    case 'f':
    case 'F':
    case 's':
    case 'S':
      prec = 2;
      break;

    case 'd':
    case 'D':
    case 'r':
    case 'R':
      prec = 4;
      break;

    case 'x':
    case 'X':
      prec = 6;
      break;

    case 'p':
    case 'P':
      prec = 6;
      break;

    default:
      *sizeP = 0;
      return _("Bad call to MD_NTOF()");
    }
  t = atof_ieee (input_line_pointer, type, words);
  if (t)
    input_line_pointer = t;

  *sizeP = prec * sizeof (LITTLENUM_TYPE);
  for (wordP = words + prec - 1; prec--;)
    {
      md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
      litP += sizeof (LITTLENUM_TYPE);
    }
  return 0;
}

int
md_parse_option (c, a)
     int c;
     char *a;
{
  return 1;
}

void
tc_Nout_fix_to_chars ()
{
  printf (_("call to tc_Nout_fix_to_chars \n"));
  abort ();
}

/* Called after relaxing, change the frags so they know how big they
   are.  */

void
md_convert_frag (headers, seg, fragP)
     object_headers *headers;
     segT seg;
     fragS *fragP;
{
  int disp_size = 0;
  int inst_size = 0;
  unsigned char *buffer =
    (unsigned char *) (fragP->fr_fix + fragP->fr_literal);

  switch (fragP->fr_subtype)
    {
    case C (COND_BRANCH, BYTE_DISP):
    case C (UNCOND_BRANCH, BYTE_DISP):
      disp_size = 1;
      inst_size = 1;
      break;

      /* Conditional branches to a known 16 bit displacement.  */
    case C (COND_BRANCH, WORD_DISP):
      switch (buffer[0])
	{
	case OP_BCC:
	case OP_BCS:
	case OP_BEQ:
	case OP_BMI:
	case OP_BNE:
	case OP_BPL:
	case OP_BVS:
	case OP_BVC:
	  /* Invert the sense of the test */
	  buffer[0] ^= 0x20;
	  buffer[1] = 3;	/* Jump over following brl */
	  buffer[2] = OP_BRL;
	  buffer[3] = 0;
	  buffer[4] = 0;
	  disp_size = 2;
	  inst_size = 3;
	  break;
	default:
	  abort ();
	}
      break;
    case C (UNCOND_BRANCH, WORD_DISP):
      /* Unconditional branches to a known 16 bit displacement.  */

      switch (buffer[0])
	{
	case OP_BRA:
	  buffer[0] = OP_BRL;
	  disp_size = 2;
	  inst_size = 1;
	  break;
	default:
	  abort ();
	}
      break;
      /* Got to create a branch over a reloc here.  */
    case C (COND_BRANCH, UNDEF_WORD_DISP):
      buffer[0] ^= 0x20;	/* invert test */
      buffer[1] = 3;
      buffer[2] = OP_BRL;
      buffer[3] = 0;
      buffer[4] = 0;
      fix_new (fragP,
	       fragP->fr_fix + 3,
	       4,
	       fragP->fr_symbol,
	       fragP->fr_offset,
	       0,
	       R_W65_PCR16);

      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
      break;
    case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
      buffer[0] = OP_BRL;
      buffer[1] = 0;
      buffer[2] = 0;
      fix_new (fragP,
	       fragP->fr_fix + 1,
	       4,
	       fragP->fr_symbol,
	       fragP->fr_offset,
	       0,
	       R_W65_PCR16);

      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
      break;
    default:
      abort ();
    }
  if (inst_size)
    {
      /* Get the address of the end of the instruction.  */
      int next_inst = (fragP->fr_fix + fragP->fr_address
		       + disp_size + inst_size);
      int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
		       fragP->fr_offset);
      int disp = targ_addr - next_inst;

      md_number_to_chars (buffer + inst_size, disp, disp_size);
      fragP->fr_fix += disp_size + inst_size;
      fragP->fr_var = 0;
    }
}

valueT
md_section_align (seg, size)
     segT seg;
     valueT size;
{
  return ((size + (1 << section_alignment[(int) seg]) - 1)
	  & (-1 << section_alignment[(int) seg]));
}

void
md_apply_fix3 (fixP, valP, seg)
     fixS *fixP;
     vauleT * valP;
     segT seg ATTRIBUTE_UNUSED;
{
  long val = * (long *) valP;
  char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
  int addr = fixP->fx_frag->fr_address + fixP->fx_where;

  if (fixP->fx_r_type == 0)
    {
      if (fixP->fx_size == 1)
	fixP->fx_r_type = R_W65_ABS8;
      else
	fixP->fx_r_type = R_W65_ABS16;
    }

  switch (fixP->fx_r_type)
    {
    case R_W65_ABS8S16:
      val >>= 8;
    case R_W65_ABS8S8:
      val >>= 8;
    case R_W65_ABS8:
      *buf++ = val;
      break;
    case R_W65_ABS16S16:
      val >>= 8;
    case R_W65_ABS16S8:
      val >>= 8;
    case R_W65_ABS16:
      *buf++ = val >> 0;
      *buf++ = val >> 8;
      break;
    case R_W65_ABS24:
      *buf++ = val >> 0;
      *buf++ = val >> 8;
      *buf++ = val >> 16;
      break;
    case R_W65_PCR8:
      *buf++ = val - addr - 1;
      break;
    case R_W65_PCR16:
      val = val - addr - 1;
      *buf++ = val;
      *buf++ = val >> 8;
      break;
    case R_W65_DP:
      *buf++ = val;
      break;

    default:
      abort ();
    }

  if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
    fixP->fx_done = 1;
}

/* Put number into target byte order.  */

void
md_number_to_chars (ptr, use, nbytes)
     char *ptr;
     valueT use;
     int nbytes;
{
  number_to_chars_littleendian (ptr, use, nbytes);
}

long
md_pcrel_from (fixP)
     fixS *fixP;
{
  int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1;
  return gap;
}

void
tc_coff_symbol_emit_hook (x)
     symbolS *x;
{
}

short
tc_coff_fix2rtype (fix_ptr)
     fixS *fix_ptr;
{
  return fix_ptr->fx_r_type;
}

void
tc_reloc_mangle (fix_ptr, intr, base)
     fixS *fix_ptr;
     struct internal_reloc *intr;
     bfd_vma base;

{
  symbolS *symbol_ptr;

  symbol_ptr = fix_ptr->fx_addsy;

  /* If this relocation is attached to a symbol then it's ok
     to output it */
  if (fix_ptr->fx_r_type == RELOC_32)
    {
      /* cons likes to create reloc32's whatever the size of the reloc..
       */
      switch (fix_ptr->fx_size)
	{
	case 2:
	  intr->r_type = R_IMM16;
	  break;
	case 1:
	  intr->r_type = R_IMM8;
	  break;
	default:
	  abort ();
	}
    }
  else
    {
      if (fix_ptr->fx_size == 4)
	intr->r_type = R_W65_ABS24;
      else
	intr->r_type = fix_ptr->fx_r_type;
    }

  intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
  intr->r_offset = fix_ptr->fx_offset;

  /* Turn the segment of the symbol into an offset.  */
  if (symbol_ptr)
    {
      symbolS *dot;

      dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
      if (dot)
	{
	  intr->r_offset += S_GET_VALUE (symbol_ptr);
	  intr->r_symndx = dot->sy_number;
	}
      else
	{
	  intr->r_symndx = symbol_ptr->sy_number;
	}
    }
  else
    {
      intr->r_symndx = -1;
    }
}

int
tc_coff_sizemachdep (frag)
     fragS *frag;
{
  return md_relax_table[frag->fr_subtype].rlx_length;
}

/* Called just before address relaxation, return the length by which a
   fragment must grow to reach it's destination.  */

int
md_estimate_size_before_relax (fragP, segment_type)
     register fragS *fragP;
     register segT segment_type;
{
  int what;

  switch (fragP->fr_subtype)
    {
    default:
      abort ();

    case C (COND_BRANCH, UNDEF_BYTE_DISP):
    case C (UNCOND_BRANCH, UNDEF_BYTE_DISP):
      what = GET_WHAT (fragP->fr_subtype);
      /* Used to be a branch to somewhere which was unknown.  */
      if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
	{
	  /* Got a symbol and it's defined in this segment, become byte
	     sized - maybe it will fix up.  */
	  fragP->fr_subtype = C (what, BYTE_DISP);
	}
      else
	{
	  /* Its got a segment, but its not ours, so it will always be
             long.  */
	  fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
	}
      break;

    case C (COND_BRANCH, BYTE_DISP):
    case C (COND_BRANCH, WORD_DISP):
    case C (COND_BRANCH, UNDEF_WORD_DISP):
    case C (UNCOND_BRANCH, BYTE_DISP):
    case C (UNCOND_BRANCH, WORD_DISP):
    case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
      /* When relaxing a section for the second time, we don't need to
	 do anything besides return the current size.  */
      break;
    }

  fragP->fr_var = md_relax_table[fragP->fr_subtype].rlx_length;
  return fragP->fr_var;
}

const char *md_shortopts = "";
struct option md_longopts[] = {
#define OPTION_RELAX (OPTION_MD_BASE)
  {NULL, no_argument, NULL, 0}
};

void
md_show_usage (stream)
     FILE *stream;
{
}

size_t md_longopts_size = sizeof (md_longopts);