aboutsummaryrefslogtreecommitdiff
blob: 016b25e80709dc53796389690d87a7c5984907ab (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
/* Disassemble Xilinx microblaze instructions.
   Copyright (C) 1993, 1999, 2000 Free Software Foundation, Inc.

This program 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 of the License, or
(at your option) any later version.

This program 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 this program; if not, see <http://www.gnu.org/licenses/>.  */

/*
 * Copyright (c) 2001 Xilinx, Inc.  All rights reserved. 
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Xilinx, Inc.  The name of the Company may not be used to endorse 
 * or promote products derived from this software without specific prior 
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	Xilinx, Inc.
 */


#include <stdio.h>
#define STATIC_TABLE
#define DEFINE_TABLE

#ifndef MICROBLAZE_OPC
#define MICROBLAZE_OPC
/* Assembler instructions for Xilinx's microblaze processor
   Copyright (C) 1999, 2000 Free Software Foundation, Inc.

   
This program 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 of the License, or
(at your option) any later version.

This program 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 this program; if not, see <http://www.gnu.org/licenses/>.  */

/*
 * Copyright (c) 2001 Xilinx, Inc.  All rights reserved. 
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Xilinx, Inc.  The name of the Company may not be used to endorse 
 * or promote products derived from this software without specific prior 
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	Xilinx, Inc.
 */


#ifndef MICROBLAZE_OPCM
#define MICROBLAZE_OPCM

/*
 * Copyright (c) 2001 Xilinx, Inc.  All rights reserved. 
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Xilinx, Inc.  The name of the Company may not be used to endorse 
 * or promote products derived from this software without specific prior 
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	Xilinx, Inc.
 * $Header:
 */

enum microblaze_instr {
   add, rsub, addc, rsubc, addk, rsubk, addkc, rsubkc, cmp, cmpu,
   addi, rsubi, addic, rsubic, addik, rsubik, addikc, rsubikc, mul,
   idiv, idivu, bsll, bsra, bsrl, get, put, nget, nput, cget, cput,
   ncget, ncput, muli, bslli, bsrai, bsrli, mului, or, and, xor,
   andn, pcmpbf, pcmpbc, pcmpeq, pcmpne, sra, src, srl, sext8, sext16, wic, wdc, mts, mfs, br, brd,
   brld, bra, brad, brald, microblaze_brk, beq, beqd, bne, bned, blt,
   bltd, ble, bled, bgt, bgtd, bge, bged, ori, andi, xori, andni,
   imm, rtsd, rtid, rtbd, rted, bri, brid, brlid, brai, braid, bralid,
   brki, beqi, beqid, bnei, bneid, blti, bltid, blei, bleid, bgti,
   bgtid, bgei, bgeid, lbu, lhu, lw, sb, sh, sw, lbui, lhui, lwi,
   sbi, shi, swi, msrset, msrclr, tuqula, fadd, frsub, fmul, fdiv, 
   fcmp_lt, fcmp_eq, fcmp_le, fcmp_gt, fcmp_ne, fcmp_ge, fcmp_un, invalid_inst } ;

enum microblaze_instr_type {
   arithmetic_inst, logical_inst, mult_inst, div_inst, branch_inst,
   return_inst, immediate_inst, special_inst, memory_load_inst,
   memory_store_inst, barrel_shift_inst, anyware_inst };

#define INST_WORD_SIZE 4

/* gen purpose regs go from 0 to 31 */
/* mask is reg num - max_reg_num, ie reg_num - 32 in this case */

#define REG_PC_MASK 0x8000
#define REG_MSR_MASK 0x8001
#define REG_EAR_MASK 0x8003
#define REG_ESR_MASK 0x8005
#define REG_FSR_MASK 0x8007

#define MIN_REGNUM 0
#define MAX_REGNUM 31

#define REG_PC  32 /* PC */
#define REG_MSR 33 /* machine status reg */
#define REG_EAR 35 /* Exception reg */
#define REG_ESR 37 /* Exception reg */
#define REG_FSR 39 /* FPU Status reg */

/* alternate names for gen purpose regs */
#define REG_SP  1 /* stack pointer */
#define REG_ROSDP 2 /* read-only small data pointer */
#define REG_RWSDP 13 /* read-write small data pointer */

/* Assembler Register - Used in Delay Slot Optimization */
#define REG_AS    18
#define REG_ZERO  0
 
#define RD_LOW  21 /* low bit for RD */
#define RA_LOW  16 /* low bit for RA */
#define RB_LOW  11 /* low bit for RB */
#define IMM_LOW  0 /* low bit for immediate */

#define RD_MASK 0x03E00000
#define RA_MASK 0x001F0000
#define RB_MASK 0x0000F800
#define IMM_MASK 0x0000FFFF

// imm mask for barrel shifts
#define IMM5_MASK 0x0000001F


// imm mask for get, put instructions
#define  IMM12_MASK 0x00000FFF

// imm mask for msrset, msrclr instructions
#define  IMM14_MASK 0x00003FFF

#endif /* MICROBLAZE-OPCM */

#define INST_TYPE_RD_R1_R2 0
#define INST_TYPE_RD_R1_IMM 1
#define INST_TYPE_RD_R1_UNSIGNED_IMM 2
#define INST_TYPE_RD_R1 3
#define INST_TYPE_RD_R2 4
#define INST_TYPE_RD_IMM 5
#define INST_TYPE_R2 6
#define INST_TYPE_R1_R2 7
#define INST_TYPE_R1_IMM 8
#define INST_TYPE_IMM 9
#define INST_TYPE_SPECIAL_R1 10
#define INST_TYPE_RD_SPECIAL 11
#define INST_TYPE_R1 12
  // new instn type for barrel shift imms
#define INST_TYPE_RD_R1_IMM5  13
#define INST_TYPE_RD_IMM12    14
#define INST_TYPE_R1_IMM12    15

  // new insn type for insn cache
#define INST_TYPE_RD_R1_SPECIAL 16

// new insn type for msrclr, msrset insns.
#define INST_TYPE_RD_IMM14    17

// new insn type for tuqula rd - addik rd, r0, 42
#define INST_TYPE_RD    18

#define INST_TYPE_NONE 25



#define INST_PC_OFFSET 1 /* instructions where the label address is resolved as a PC offset (for branch label)*/
#define INST_NO_OFFSET 0 /* instructions where the label address is resolved as an absolute value (for data mem or abs address)*/

#define IMMVAL_MASK_NON_SPECIAL 0x0000
#define IMMVAL_MASK_MTS 0x4000
#define IMMVAL_MASK_MFS 0x0000

#define OPCODE_MASK_H   0xFC000000 /* High 6 bits only */
#define OPCODE_MASK_H1  0xFFE00000 /* High 11 bits */
#define OPCODE_MASK_H2  0xFC1F0000 /* High 6 and bits 20-16 */
#define OPCODE_MASK_H12 0xFFFF0000 /* High 16 */
#define OPCODE_MASK_H4  0xFC0007FF /* High 6 and low 11 bits */
#define OPCODE_MASK_H13S 0xFFE0FFF0 /* High 11 and 15:1 bits and last nibble of last byte for spr */
#define OPCODE_MASK_H23S 0xFC1FFFF0 /* High 6, 20-16 and 15:1 bits and last nibble of last byte for spr */
#define OPCODE_MASK_H34 0xFC00FFFF /* High 6 and low 16 bits */
#define OPCODE_MASK_H14 0xFFE007FF /* High 11 and low 11 bits */
#define OPCODE_MASK_H24 0xFC1F07FF /* High 6, bits 20-16 and low 11 bits */
#define OPCODE_MASK_H124  0xFFFF07FF /* High 16, and low 11 bits */
#define OPCODE_MASK_H1234 0xFFFFFFFF /* All 32 bits */
#define OPCODE_MASK_H3  0xFC000600 /* High 6 bits and bits 21, 22 */  
#define OPCODE_MASK_H32 0xFC00F000 /* High 6 bits and bit 16, 17, 18 and 19*/
#define OPCODE_MASK_H34B   0xFC0000FF /* High 6 bits and low 8 bits */

// New Mask for msrset, msrclr insns.
#define OPCODE_MASK_H23N  0xFC1FC000 /* High 6 and bits 12 - 18 */

#define DELAY_SLOT 1
#define NO_DELAY_SLOT 0

#define MAX_OPCODES 149

struct op_code_struct {
  const char *name;
  short inst_type; /* registers and immediate values involved */
  short inst_offset_type; /* immediate vals offset from PC? (= 1 for branches) */
  short delay_slots; /* info about delay slots needed after this instr. */
  short immval_mask;
  unsigned long bit_sequence; /* all the fixed bits for the op are set and all the variable bits (reg names, imm vals) are set to 0 */ 
  unsigned long opcode_mask; /* which bits define the opcode */
  enum microblaze_instr instr;
  enum microblaze_instr_type instr_type;
  /* more info about output format here */
} opcodes[MAX_OPCODES] = 

{ 
  {"add",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x00000000, OPCODE_MASK_H4, add, arithmetic_inst },
  {"rsub",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x04000000, OPCODE_MASK_H4, rsub, arithmetic_inst },
  {"addc",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x08000000, OPCODE_MASK_H4, addc, arithmetic_inst },
  {"rsubc", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x0C000000, OPCODE_MASK_H4, rsubc, arithmetic_inst },
  {"addk",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x10000000, OPCODE_MASK_H4, addk, arithmetic_inst },
  {"rsubk", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x14000000, OPCODE_MASK_H4, rsubk, arithmetic_inst },
  {"cmp",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x14000001, OPCODE_MASK_H4, cmp, arithmetic_inst },
  {"cmpu",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x14000003, OPCODE_MASK_H4, cmpu, arithmetic_inst },
  {"addkc", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x18000000, OPCODE_MASK_H4, addkc, arithmetic_inst },
  {"rsubkc",INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x1C000000, OPCODE_MASK_H4, rsubkc, arithmetic_inst },
  {"addi",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x20000000, OPCODE_MASK_H, addi, arithmetic_inst },
  {"rsubi", INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x24000000, OPCODE_MASK_H, rsubi, arithmetic_inst },
  {"addic", INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x28000000, OPCODE_MASK_H, addic, arithmetic_inst },
  {"rsubic",INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x2C000000, OPCODE_MASK_H, rsubic, arithmetic_inst },
  {"addik", INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x30000000, OPCODE_MASK_H, addik, arithmetic_inst },
  {"rsubik",INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x34000000, OPCODE_MASK_H, rsubik, arithmetic_inst },
  {"addikc",INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x38000000, OPCODE_MASK_H, addikc, arithmetic_inst },
  {"rsubikc",INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x3C000000, OPCODE_MASK_H, rsubikc, arithmetic_inst },
  {"mul",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x40000000, OPCODE_MASK_H4, mul, mult_inst },
  {"idiv",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x48000000, OPCODE_MASK_H4, idiv, div_inst },
  {"idivu", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x48000002, OPCODE_MASK_H4, idivu, div_inst },
  {"bsll",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x44000400, OPCODE_MASK_H3, bsll, barrel_shift_inst },
  {"bsra",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x44000200, OPCODE_MASK_H3, bsra, barrel_shift_inst },
  {"bsrl",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x44000000, OPCODE_MASK_H3, bsrl, barrel_shift_inst },
  {"get",   INST_TYPE_RD_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C000000, OPCODE_MASK_H32, get, anyware_inst },
  {"put",   INST_TYPE_R1_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C008000, OPCODE_MASK_H32, put, anyware_inst },
  {"nget",  INST_TYPE_RD_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C004000, OPCODE_MASK_H32, nget, anyware_inst },
  {"nput",  INST_TYPE_R1_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C00C000, OPCODE_MASK_H32, nput, anyware_inst },
  {"cget",  INST_TYPE_RD_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C002000, OPCODE_MASK_H32, cget, anyware_inst },
  {"cput",  INST_TYPE_R1_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C00A000, OPCODE_MASK_H32, cput, anyware_inst },
  {"ncget", INST_TYPE_RD_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C006000, OPCODE_MASK_H32, ncget, anyware_inst },
  {"ncput", INST_TYPE_R1_IMM12, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x6C00E000, OPCODE_MASK_H32, ncput, anyware_inst },
  {"muli",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x60000000, OPCODE_MASK_H, muli, mult_inst },
  {"bslli", INST_TYPE_RD_R1_IMM5, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x64000400, OPCODE_MASK_H3, bslli, barrel_shift_inst },
  {"bsrai", INST_TYPE_RD_R1_IMM5, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x64000200, OPCODE_MASK_H3, bsrai, barrel_shift_inst },
  {"bsrli", INST_TYPE_RD_R1_IMM5, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x64000000, OPCODE_MASK_H3, bsrli, barrel_shift_inst },
  {"or",    INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x80000000, OPCODE_MASK_H4, or, logical_inst },
  {"and",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x84000000, OPCODE_MASK_H4, and, logical_inst },
  {"xor",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x88000000, OPCODE_MASK_H4, xor, logical_inst },
  {"andn",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x8C000000, OPCODE_MASK_H4, andn, logical_inst },
  {"pcmpbf",INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x80000400, OPCODE_MASK_H4, pcmpbf, logical_inst },
  {"pcmpbc",INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x84000400, OPCODE_MASK_H4, pcmpbc, logical_inst },
  {"pcmpeq",INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x88000400, OPCODE_MASK_H4, pcmpeq, logical_inst },
  {"pcmpne",INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x8C000400, OPCODE_MASK_H4, pcmpne, logical_inst },
  {"sra",   INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000001, OPCODE_MASK_H34, sra, logical_inst },
  {"src",   INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000021, OPCODE_MASK_H34, src, logical_inst },
  {"srl",   INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000041, OPCODE_MASK_H34, srl, logical_inst },
  {"sext8", INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000060, OPCODE_MASK_H34, sext8, logical_inst },
  {"sext16",INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000061, OPCODE_MASK_H34, sext16, logical_inst },
  {"wic",   INST_TYPE_RD_R1_SPECIAL, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000068, OPCODE_MASK_H34B, wic, special_inst },
  {"wdc",   INST_TYPE_RD_R1_SPECIAL, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x90000064, OPCODE_MASK_H34B, wdc, special_inst },
  {"mts",   INST_TYPE_SPECIAL_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_MTS, 0x9400C000, OPCODE_MASK_H13S, mts, special_inst },
  {"mfs",   INST_TYPE_RD_SPECIAL, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_MFS, 0x94008000, OPCODE_MASK_H23S, mfs, special_inst },
  {"br",    INST_TYPE_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x98000000, OPCODE_MASK_H124, br, branch_inst },
  {"brd",   INST_TYPE_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x98100000, OPCODE_MASK_H124, brd, branch_inst },
  {"brld",  INST_TYPE_RD_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x98140000, OPCODE_MASK_H24, brld, branch_inst },
  {"bra",   INST_TYPE_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x98080000, OPCODE_MASK_H124, bra, branch_inst },
  {"brad",  INST_TYPE_R2, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x98180000, OPCODE_MASK_H124, brad, branch_inst },
  {"brald", INST_TYPE_RD_R2, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x981C0000, OPCODE_MASK_H24, brald, branch_inst },
  {"brk",   INST_TYPE_RD_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x980C0000, OPCODE_MASK_H24, microblaze_brk, branch_inst },
  {"beq",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9C000000, OPCODE_MASK_H14, beq, branch_inst },
  {"beqd",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9E000000, OPCODE_MASK_H14, beqd, branch_inst },
  {"bne",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9C200000, OPCODE_MASK_H14, bne, branch_inst },
  {"bned",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9E200000, OPCODE_MASK_H14, bned, branch_inst },
  {"blt",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9C400000, OPCODE_MASK_H14, blt, branch_inst },
  {"bltd",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9E400000, OPCODE_MASK_H14, bltd, branch_inst },
  {"ble",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9C600000, OPCODE_MASK_H14, ble, branch_inst },
  {"bled",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9E600000, OPCODE_MASK_H14, bled, branch_inst },
  {"bgt",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9C800000, OPCODE_MASK_H14, bgt, branch_inst },
  {"bgtd",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9E800000, OPCODE_MASK_H14, bgtd, branch_inst },
  {"bge",   INST_TYPE_R1_R2, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9CA00000, OPCODE_MASK_H14, bge, branch_inst },
  {"bged",  INST_TYPE_R1_R2, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x9EA00000, OPCODE_MASK_H14, bged, branch_inst },
  {"ori",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xA0000000, OPCODE_MASK_H, ori, logical_inst },
  {"andi",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xA4000000, OPCODE_MASK_H, andi, logical_inst },
  {"xori",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xA8000000, OPCODE_MASK_H, xori, logical_inst },
  {"andni", INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xAC000000, OPCODE_MASK_H, andni, logical_inst },
  {"imm",   INST_TYPE_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB0000000, OPCODE_MASK_H12, imm, immediate_inst },
  {"rtsd",  INST_TYPE_R1_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB6000000, OPCODE_MASK_H1, rtsd, return_inst },
  {"rtid",  INST_TYPE_R1_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB6200000, OPCODE_MASK_H1, rtid, return_inst },
  {"rtbd",  INST_TYPE_R1_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB6400000, OPCODE_MASK_H1, rtbd, return_inst },
  {"rted",  INST_TYPE_R1_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB6800000, OPCODE_MASK_H1, rted, return_inst },
  {"bri",   INST_TYPE_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB8000000, OPCODE_MASK_H12, bri, branch_inst },
  {"brid",  INST_TYPE_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB8100000, OPCODE_MASK_H12, brid, branch_inst },
  {"brlid", INST_TYPE_RD_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB8140000, OPCODE_MASK_H2, brlid, branch_inst },
  {"brai",  INST_TYPE_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB8080000, OPCODE_MASK_H12, brai, branch_inst },
  {"braid", INST_TYPE_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB8180000, OPCODE_MASK_H12, braid, branch_inst },
  {"bralid",INST_TYPE_RD_IMM, INST_NO_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB81C0000, OPCODE_MASK_H2, bralid, branch_inst },
  {"brki",  INST_TYPE_RD_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB80C0000, OPCODE_MASK_H2, brki, branch_inst },
  {"beqi",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBC000000, OPCODE_MASK_H1, beqi, branch_inst },
  {"beqid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBE000000, OPCODE_MASK_H1, beqid, branch_inst },
  {"bnei",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBC200000, OPCODE_MASK_H1, bnei, branch_inst },
  {"bneid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBE200000, OPCODE_MASK_H1, bneid, branch_inst },
  {"blti",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBC400000, OPCODE_MASK_H1, blti, branch_inst },
  {"bltid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBE400000, OPCODE_MASK_H1, bltid, branch_inst },
  {"blei",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBC600000, OPCODE_MASK_H1, blei, branch_inst },
  {"bleid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBE600000, OPCODE_MASK_H1, bleid, branch_inst },
  {"bgti",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBC800000, OPCODE_MASK_H1, bgti, branch_inst },
  {"bgtid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBE800000, OPCODE_MASK_H1, bgtid, branch_inst },
  {"bgei",  INST_TYPE_R1_IMM, INST_PC_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBCA00000, OPCODE_MASK_H1, bgei, branch_inst },
  {"bgeid", INST_TYPE_R1_IMM, INST_PC_OFFSET, DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xBEA00000, OPCODE_MASK_H1, bgeid, branch_inst },
  {"lbu",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xC0000000, OPCODE_MASK_H4, lbu, memory_load_inst },
  {"lhu",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xC4000000, OPCODE_MASK_H4, lhu, memory_load_inst },
  {"lw",    INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xC8000000, OPCODE_MASK_H4, lw, memory_load_inst },
  {"sb",    INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xD0000000, OPCODE_MASK_H4, sb, memory_store_inst },
  {"sh",    INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xD4000000, OPCODE_MASK_H4, sh, memory_store_inst },
  {"sw",    INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xD8000000, OPCODE_MASK_H4, sw, memory_store_inst },
  {"lbui",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xE0000000, OPCODE_MASK_H, lbui, memory_load_inst },
  {"lhui",  INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xE4000000, OPCODE_MASK_H, lhui, memory_load_inst },
  {"lwi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xE8000000, OPCODE_MASK_H, lwi, memory_load_inst },
  {"sbi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xF0000000, OPCODE_MASK_H, sbi, memory_store_inst },
  {"shi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xF4000000, OPCODE_MASK_H, shi, memory_store_inst },
  {"swi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xF8000000, OPCODE_MASK_H, swi, memory_store_inst },
  {"nop",   INST_TYPE_NONE, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x80000000, OPCODE_MASK_H1234, invalid_inst, logical_inst }, /* translates to or r0, r0, r0 */
  {"la",    INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x30000000, OPCODE_MASK_H, invalid_inst, arithmetic_inst }, /* la translates to addik */
  {"tuqula",INST_TYPE_RD, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x3000002A, OPCODE_MASK_H, invalid_inst, arithmetic_inst }, /* tuqula rd translates to addik rd, r0, 42 */
  {"not",   INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xA800FFFF, OPCODE_MASK_H34, invalid_inst, logical_inst }, /* not translates to xori rd,ra,-1 */
  {"neg",   INST_TYPE_RD_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x04000000, OPCODE_MASK_H, invalid_inst, arithmetic_inst }, /* neg translates to rsub rd, ra, r0 */
  {"rtb",   INST_TYPE_R1, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xB6000004, OPCODE_MASK_H1, invalid_inst, return_inst }, /* rtb translates to rts rd, 4 */
  {"sub",   INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x04000000, OPCODE_MASK_H, invalid_inst, arithmetic_inst }, /* sub translates to rsub rd, rb, ra */
  {"lmi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xE8000000, OPCODE_MASK_H, invalid_inst, memory_load_inst },
  {"smi",   INST_TYPE_RD_R1_IMM, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0xF8000000, OPCODE_MASK_H, invalid_inst, memory_store_inst },
  {"msrset",INST_TYPE_RD_IMM14, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x94100000, OPCODE_MASK_H23N, msrset, special_inst },
  {"msrclr",INST_TYPE_RD_IMM14, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x94110000, OPCODE_MASK_H23N, msrclr, special_inst },
  {"fadd",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000000, OPCODE_MASK_H4, fadd, arithmetic_inst },
  {"frsub",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000080, OPCODE_MASK_H4, frsub, arithmetic_inst },
  {"fmul",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000100, OPCODE_MASK_H4, fmul, arithmetic_inst },
  {"fdiv",  INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000180, OPCODE_MASK_H4, fdiv, arithmetic_inst },
  {"fcmp.lt", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000210, OPCODE_MASK_H4, fcmp_lt, arithmetic_inst },
  {"fcmp.eq", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000220, OPCODE_MASK_H4, fcmp_eq, arithmetic_inst },
  {"fcmp.le", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000230, OPCODE_MASK_H4, fcmp_le, arithmetic_inst },
  {"fcmp.gt", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000240, OPCODE_MASK_H4, fcmp_gt, arithmetic_inst },
  {"fcmp.ne", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000250, OPCODE_MASK_H4, fcmp_ne, arithmetic_inst },
  {"fcmp.ge", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000260, OPCODE_MASK_H4, fcmp_ge, arithmetic_inst },
  {"fcmp.un", INST_TYPE_RD_R1_R2, INST_NO_OFFSET, NO_DELAY_SLOT, IMMVAL_MASK_NON_SPECIAL, 0x58000200, OPCODE_MASK_H4, fcmp_un, arithmetic_inst },
  {""}
};

/* prefix for register names */
char register_prefix[] = "r";
char special_register_prefix[] = "spr";
char fsl_register_prefix[] = "rfsl";


/* #defines for valid immediate range */
#define MIN_IMM  0x80000000
#define MAX_IMM  0x7fffffff 

#define MIN_IMM12  0x000
#define MAX_IMM12  0x7ff

#define MIN_IMM14  0x0000
#define MAX_IMM14  0x1fff

#endif /* MICROBLAZE_OPC */

#include "dis-asm.h"
#include <strings.h>

#define get_field_rd(instr) get_field(instr, RD_MASK, RD_LOW)
#define get_field_r1(instr) get_field(instr, RA_MASK, RA_LOW)
#define get_field_r2(instr) get_field(instr, RB_MASK, RB_LOW)
#define get_int_field_imm(instr) ((instr & IMM_MASK) >> IMM_LOW)
#define get_int_field_r1(instr) ((instr & RA_MASK) >> RA_LOW)

static char *
get_field (long instr, long mask, unsigned short low) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%s%d", register_prefix, (int)((instr & mask) >> low));
  return(strdup(tmpstr));
}

static char *
get_field_imm (long instr) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%d", (short)((instr & IMM_MASK) >> IMM_LOW));
  return(strdup(tmpstr));
}

static char *
get_field_imm5 (long instr) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%d", (short)((instr & IMM5_MASK) >> IMM_LOW));
  return(strdup(tmpstr));
}

static char *
get_field_imm12 (long instr) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%s%d", fsl_register_prefix, (short)((instr & IMM12_MASK) >> IMM_LOW));
  return(strdup(tmpstr));
}

static char *
get_field_imm14 (long instr) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%d", (short)((instr & IMM14_MASK) >> IMM_LOW));
  return(strdup(tmpstr));
}

#if 0
static char *
get_field_unsigned_imm (long instr) 
{
  char tmpstr[25];
  sprintf(tmpstr, "%d", (int)((instr & IMM_MASK) >> IMM_LOW));
  return(strdup(tmpstr));
}
#endif

/*
  char *
  get_field_special (instr) 
  long instr;
  {
  char tmpstr[25];
  
  sprintf(tmpstr, "%s%s", register_prefix, (((instr & IMM_MASK) >> IMM_LOW) & REG_MSR_MASK) == 0 ? "pc" : "msr");
  
  return(strdup(tmpstr));
  }
*/

static char *
get_field_special (long instr, struct op_code_struct * op) 
{
   char tmpstr[25];
   char spr[5];

   switch ( (((instr & IMM_MASK) >> IMM_LOW) ^ op->immval_mask) ) {
   case REG_MSR_MASK :
      strcpy(spr, "msr");
      break;
   case REG_PC_MASK :
      strcpy(spr, "pc");
      break;
   case REG_EAR_MASK :
      strcpy(spr, "ear");
      break;
   case REG_ESR_MASK :
      strcpy(spr, "esr");
      break;
   case REG_FSR_MASK :
      strcpy(spr, "fsr");
      break;      
   default :
      strcpy(spr, "pc");
      break;
   }
   
   sprintf(tmpstr, "%s%s", register_prefix, spr);
   return(strdup(tmpstr));
}

static unsigned long
read_insn_microblaze(bfd_vma memaddr, struct disassemble_info *info,
                     struct op_code_struct ** opr)
{
  unsigned char       ibytes[4];
  int                 status;
  struct op_code_struct * op;
  unsigned long inst;

  status = info->read_memory_func (memaddr, ibytes, 4, info);

  if (status != 0) 
    {
      info->memory_error_func (status, memaddr, info);
      return 0;
    }

  if (info->endian == BFD_ENDIAN_BIG)
    inst = (ibytes[0] << 24) | (ibytes[1] << 16) | (ibytes[2] << 8) | ibytes[3];
  else if (info->endian == BFD_ENDIAN_LITTLE)
    inst = (ibytes[3] << 24) | (ibytes[2] << 16) | (ibytes[1] << 8) | ibytes[0];
  else
    abort ();

  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;

  *opr = op;
  return inst;
}


int 
print_insn_microblaze (bfd_vma memaddr, struct disassemble_info * info)
{
  fprintf_ftype       fprintf = info->fprintf_func;
  void *              stream = info->stream;
  unsigned long       inst, prev_inst;
  struct op_code_struct * op, *pop;
  int                 immval = 0;
  bfd_boolean         immfound = false;
  static bfd_vma prev_insn_addr = -1; /*init the prev insn addr */
  static int     prev_insn_vma = -1;  /*init the prev insn vma */
  int            curr_insn_vma = info->buffer_vma;

  info->bytes_per_chunk = 4;

  inst = read_insn_microblaze (memaddr, info, &op);
  if (inst == 0)
    return -1;
  
  if (prev_insn_vma == curr_insn_vma) {
  if (memaddr-(info->bytes_per_chunk) == prev_insn_addr) {
    prev_inst = read_insn_microblaze (prev_insn_addr, info, &pop);
    if (prev_inst == 0)
      return -1;
    if (pop->instr == imm) {
      immval = (get_int_field_imm(prev_inst) << 16) & 0xffff0000;
      immfound = true;
    }
    else {
      immval = 0;
      immfound = false;
    }
  }
  }
  /* make curr insn as prev insn */
  prev_insn_addr = memaddr;
  prev_insn_vma = curr_insn_vma;

  if (op->name == 0)
    fprintf (stream, ".short 0x%04x", inst);
  else
    {
      fprintf (stream, "%s", op->name);
      
      switch (op->inst_type)
	{
  case INST_TYPE_RD_R1_R2:
     fprintf(stream, "\t%s, %s, %s", get_field_rd(inst), get_field_r1(inst), get_field_r2(inst));
     break;
        case INST_TYPE_RD_R1_IMM:
	  fprintf(stream, "\t%s, %s, %s", get_field_rd(inst), get_field_r1(inst), get_field_imm(inst));
	  if (info->print_address_func && get_int_field_r1(inst) == 0 && info->symbol_at_address_func) {
	    if (immfound)
	      immval |= (get_int_field_imm(inst) & 0x0000ffff);
	    else {
	      immval = get_int_field_imm(inst);
	      if (immval & 0x8000)
		immval |= 0xFFFF0000;
	    }
	    if (immval > 0 && info->symbol_at_address_func(immval, info)) {
	      fprintf (stream, "\t// ");
	      info->print_address_func (immval, info);
	    }
	  }
	  break;
	case INST_TYPE_RD_R1_IMM5:
	  fprintf(stream, "\t%s, %s, %s", get_field_rd(inst), get_field_r1(inst), get_field_imm5(inst));
	  break;
	case INST_TYPE_RD_IMM12:
	  fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_imm12(inst));
	  break;
	case INST_TYPE_R1_IMM12:
	  fprintf(stream, "\t%s, %s", get_field_r1(inst), get_field_imm12(inst));
	  break;
	case INST_TYPE_RD_SPECIAL:
	  fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_special(inst, op));
	  break;
	case INST_TYPE_SPECIAL_R1:
	  fprintf(stream, "\t%s, %s", get_field_special(inst, op), get_field_r1(inst));
	  break;
	case INST_TYPE_RD_R1:
	  fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_r1(inst));
	  break;
	case INST_TYPE_R1_R2:
	  fprintf(stream, "\t%s, %s", get_field_r1(inst), get_field_r2(inst));
	  break;
	case INST_TYPE_R1_IMM:
	  fprintf(stream, "\t%s, %s", get_field_r1(inst), get_field_imm(inst));
	  /* The non-pc relative instructions are returns, which shouldn't 
	     have a label printed */
	  if (info->print_address_func && op->inst_offset_type == INST_PC_OFFSET && info->symbol_at_address_func) {
	    if (immfound)
	      immval |= (get_int_field_imm(inst) & 0x0000ffff);
	    else {
	      immval = get_int_field_imm(inst);
	      if (immval & 0x8000)
		immval |= 0xFFFF0000;
	    }
	    immval += memaddr;
	    if (immval > 0 && info->symbol_at_address_func(immval, info)) {
	      fprintf (stream, "\t// ");
	      info->print_address_func (immval, info);
	    } else {
	      fprintf (stream, "\t\t// ");
	      fprintf (stream, "%x", immval);
	    }
	  }
	  break;
        case INST_TYPE_RD_IMM:
	  fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_imm(inst));
	  if (info->print_address_func && info->symbol_at_address_func) {
	    if (immfound)
	      immval |= (get_int_field_imm(inst) & 0x0000ffff);
	    else {
	      immval = get_int_field_imm(inst);
	      if (immval & 0x8000)
		immval |= 0xFFFF0000;
	    }
	    if (op->inst_offset_type == INST_PC_OFFSET)
	      immval += (int) memaddr;
	    if (info->symbol_at_address_func(immval, info)) {
	      fprintf (stream, "\t// ");
	      info->print_address_func (immval, info);
	    } 
	  }
	  break;
        case INST_TYPE_IMM:
	  fprintf(stream, "\t%s", get_field_imm(inst));
	  if (info->print_address_func && info->symbol_at_address_func && op->instr != imm) {
	    if (immfound)
	      immval |= (get_int_field_imm(inst) & 0x0000ffff);
	    else {
	      immval = get_int_field_imm(inst);
	      if (immval & 0x8000)
		immval |= 0xFFFF0000;
	    }
	    if (op->inst_offset_type == INST_PC_OFFSET)
	      immval += (int) memaddr;
	    if (immval > 0 && info->symbol_at_address_func(immval, info)) {
	      fprintf (stream, "\t// ");
	      info->print_address_func (immval, info);
	    } else if (op->inst_offset_type == INST_PC_OFFSET) {
	      fprintf (stream, "\t\t// ");
	      fprintf (stream, "%x", immval);
	    }
	  }
	  break;
        case INST_TYPE_RD_R2:
	  fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_r2(inst));
	  break;
  case INST_TYPE_R2:
     fprintf(stream, "\t%s", get_field_r2(inst));
     break;
  case INST_TYPE_R1:
     fprintf(stream, "\t%s", get_field_r1(inst));
     break;
  case INST_TYPE_RD_R1_SPECIAL:
     fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_r2(inst));
     break;
  case INST_TYPE_RD_IMM14:
     fprintf(stream, "\t%s, %s", get_field_rd(inst), get_field_imm14(inst));
     break;
     /* For tuqula instruction */
  case INST_TYPE_RD:
     fprintf(stream, "\t%s", get_field_rd(inst));
     break;
     
  default:
	  /* if the disassembler lags the instruction set */
	  fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
	  break;
	}
    }
  
  /* Say how many bytes we consumed? */
  return 4;
}

#if 0
static enum microblaze_instr
get_insn_microblaze (long inst, boolean *isunsignedimm,
                     enum microblaze_instr_type *insn_type,
                     short *delay_slots ) 
{
  struct op_code_struct * op;
  *isunsignedimm = false;

  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;

  if (op->name == 0)
    return invalid_inst;
  else {
    *isunsignedimm = (op->inst_type == INST_TYPE_RD_R1_UNSIGNED_IMM);
    *insn_type = op->instr_type;
    *delay_slots = op->delay_slots;
    return op->instr;
  }
}
#endif

#if 0
static short
get_delay_slots_microblaze ( long inst )
{
  boolean isunsignedimm;
  enum microblaze_instr_type insn_type;
  enum microblaze_instr op;
  short delay_slots;

  op = get_insn_microblaze( inst, &isunsignedimm, &insn_type, &delay_slots);
  if (op == invalid_inst)
    return 0;
  else 
    return delay_slots;
}
#endif

#if 0
static enum microblaze_instr
microblaze_decode_insn (long insn, int *rd, int *ra, int *rb, int *imm)
{
  enum microblaze_instr op;
  boolean t1;
  enum microblaze_instr_type t2;
  short t3;

  op = get_insn_microblaze(insn, &t1, &t2, &t3);
  *rd = (insn & RD_MASK) >> RD_LOW;
  *ra = (insn & RA_MASK) >> RA_LOW;
  *rb = (insn & RB_MASK) >> RB_LOW;
  t3 = (insn & IMM_MASK) >> IMM_LOW;
  *imm = (int) t3;
  return (op);
}
#endif

#if 0
static unsigned long
microblaze_get_target_address (long inst, boolean immfound, int immval,
                               long pcval, long r1val, long r2val,
                               boolean *targetvalid,
                               boolean *unconditionalbranch)
{
  struct op_code_struct * op;
  long targetaddr = 0;

  *unconditionalbranch = false;
  /* Just a linear search of the table.  */
  for (op = opcodes; op->name != 0; op ++)
    if (op->bit_sequence == (inst & op->opcode_mask))
      break;

  if (op->name == 0) {
    *targetvalid = false;
  } else if (op->instr_type == branch_inst) {
    switch (op->inst_type) {
    case INST_TYPE_R2:
      *unconditionalbranch = true;
      /* fallthru */
    case INST_TYPE_RD_R2:
    case INST_TYPE_R1_R2:
      targetaddr = r2val;
      *targetvalid = true;
      if (op->inst_offset_type == INST_PC_OFFSET)
	targetaddr += pcval;
      break;
    case INST_TYPE_IMM:
      *unconditionalbranch = true;
      /* fallthru */
    case INST_TYPE_RD_IMM:
    case INST_TYPE_R1_IMM:
      if (immfound) {
	targetaddr = (immval << 16) & 0xffff0000;
	targetaddr |= (get_int_field_imm(inst) & 0x0000ffff);
      } else {
	targetaddr = get_int_field_imm(inst);
	if (targetaddr & 0x8000)
	  targetaddr |= 0xFFFF0000;
      }
      if (op->inst_offset_type == INST_PC_OFFSET)
	targetaddr += pcval;
      *targetvalid = true;
      break;
    default:
      *targetvalid = false;
      break;
    }
  } else if (op->instr_type == return_inst) {
      if (immfound) {
	targetaddr = (immval << 16) & 0xffff0000;
	targetaddr |= (get_int_field_imm(inst) & 0x0000ffff);
      } else {
	targetaddr = get_int_field_imm(inst);
	if (targetaddr & 0x8000)
	  targetaddr |= 0xFFFF0000;
      }
      targetaddr += r1val;
      *targetvalid = true;
  } else {
    *targetvalid = false;
  }
  return targetaddr;
}
#endif