summaryrefslogtreecommitdiff
path: root/opcode-bitmask-gen.c
blob: 078c1cc18f01d02b47f8f4160805f916a2cfed53 (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
#include "opcode-bitmask-gen.h"
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define AM_ORTHO (AM_ORTHO | AM_ORTHO2)
#define AM_ADDR (AM_ZM | AM_ZMX | AM_ZMY | \
		 AM_IND | AM_INDX | AM_INDY | \
		 AM_ABS | AM_ABX | AM_ABY | \
		 AM_AIND | AM_AINDX | AM_AINDY | \
		 AM_INDX2 | AM_ZM2)

void vprint_reason(const char *reason, va_list ap) {
	if (reason != NULL && isprint(reason[0])) {
		printf("Reason: ");
		vprintf(reason, ap);
	}
}

void print_reason(const char *reason, ...) {
	va_list ap;
	va_start(ap, reason);
	vprint_reason(reason, ap);
	va_end(ap);
}

void failed(const char *name, const char *reason, ...) {
	va_list ap;
	va_start(ap, reason);
	printf("%s failed. ", name);
	vprint_reason(reason, ap);
	putchar('\n');
	va_end(ap);
}

int vformat_len(const char *fmt, va_list ap) {
	return vsnprintf(NULL, 0, fmt, ap);
}

int format_len(const char *fmt, ...) {
	int len = 0;
	va_list ap;
	va_start(ap, fmt);
	len = vformat_len(fmt, ap);
	va_end(ap);
	return len;
}

#if 0
int log2_int(uint32_t n) {
	int j = 0;

	for (int i = 4; i >= 0; i--) {
		int tmp = 1 << i;
		j |= ((n >> j) >= (uint32_t)1 << tmp) ? tmp : 0;
	}
	return j;
}
#else
int log2_int(uint32_t n) {
	return (n > 1) ? 1+log2_int(n/2) : 0;
}
#endif

uint32_t get_msb(uint32_t n) {
	return 1 << log2_int(n);
}

int get_addr_mode_type(uint32_t addr_mode) {
	return addr_mode_type[log2_int(addr_mode)];
}

uint8_t get_ind(int instr, int addr_mode) {
	uint8_t base_idx = 0;
	uint8_t offset = 0;
	switch (instr) {
		case CMP: base_idx = CMP_IND; break;
		case CPB: base_idx = CPB_IND; break;
		case JMP: base_idx = JMP_IND; break;
		case JSR: base_idx = JSR_IND; break;
		case LDA: base_idx = LDA_IND; break;
		case LDB: base_idx = LDB_IND; break;
		case LDX: base_idx = LDX_IND; break;
		case LDY: base_idx = LDY_IND; break;
		case STA: base_idx = STA_IND; break;
		case STB: base_idx = STB_IND; break;
		case STX: base_idx = STX_IND; break;
		case STY: base_idx = STY_IND; break;
	}
	switch (addr_mode) {
		case IND : offset  = 0; break;
		case INDY: offset += 1; break;
		case INDX: offset += 2; break;
	}
	return base_idx + offset;
}

uint8_t get_eind(int instr) {
	switch (instr) {
		case DEC: return DEC_EIND;
		case INC: return INC_EIND;
		case STY: return STY_EIND;
		case STA: return STA_EIND;
		case STB: return STB_EIND;
		case LDX: return LDX_EIND;
		case STX: return STX_EIND;
		case CPB: return CPB_EIND;
		case CPX: return CPX_EIND;
		case CPY: return CPY_EIND;
	}
	return 0xFF;
}

uint8_t get_ext_ortho(int instr) {
	switch (instr) {
		case LEA: return OP_LEA;
		case PEA: return OP_PEA;
		case ADD: return OP_ADD;
		case SUB: return OP_SUB;
		case NOT: return OP_NOT;
		case CLZ: return OP_CLZ;
		case CLO: return OP_CLO;
		case SWP: return OP_SWP;
		case PCN: return OP_PCN;
	}
	return 0xFF;
}

uint8_t get_opcode(const instruction *instr, int addr_mode, int inst_ext, int ext, int inst_id) {
	const uint8_t opcode = instr->op;
	const uint32_t addr_mode_mask = instr->am;
	addr_mode = (ext == ORTHO) ? ORTHO_EXT : addr_mode;
	if (inst_ext < ext) {
		switch (ext) {
			case EXT:
				if (addr_mode != EIND) {
					return 0xFF;
				}
				break;
			case ORTHO:
				if (addr_mode != ORTHO_EXT) {
					return 0xFF;
				}
				break;
		}
	}
	switch (addr_mode) {
		case ZM:
			if (addr_mode_mask & AM_ZM) {
				return opcode + 0x04;
			} else if (addr_mode_mask & AM_ZM2) {
				/* Add 0x20 to opcode if this is JMP zm, or JSR zm. */
				return opcode + 0x20;
			}
			break;
		case ZMX:
			if (addr_mode_mask & AM_ZMX) {
				/* Add 0x06 to opcode if we're using the base ISA, and 0x54 if we're using the base extension. */
				return opcode + ((ext == BASE) ? 0x06 : 0x54);
			}
			break;
		case ZMY:
			if (addr_mode_mask & AM_ZMY) {
				return opcode + 0x14;
			}
			break;
		case INDX:
			if (addr_mode_mask & AM_INDX) {
				/* Add 0x16 to opcode if we're using the base ISA, and 0x94 if we're using the base extension. */
				return opcode + ((ext == BASE) ? 0x16 : 0x94);
			}
			/* Falls Through. */
		case IND:
		case INDY:
			/* Are we using the base ISA? */
			if (ext == BASE && (addr_mode_mask & AM_IND|AM_INDY|AM_INDX2)) {
				/* Get opcode from lookup table. */
				return ind_ops[get_ind(inst_id, addr_mode)];
			/* Are we using the base extension? */
			} else if (ext == 1) {
				/* Add 0x44 to opcode if addressing mode is just indirect, and 0x84 otherwise. */
				return opcode + ((addr_mode == IND) ? 0x44 : 0x84);
			}
			break;
		case ABS:
			if (addr_mode_mask & AM_ABS) {
				return opcode + 0x10;
			}
			break;
		case ABSX:
			if (addr_mode_mask & AM_ABX) {
				return opcode + 0x50;
			}
			break;
		case ABSY:
			if (addr_mode_mask & AM_ABY) {
				return opcode;
			}
			break;
		case AIND:
			if (addr_mode_mask & AM_AIND) {
				return opcode + 0x40;
			}
			break;
		case AINDX:
			if (addr_mode_mask & AM_AINDX) {
				return opcode + 0x90;
			}
			break;
		case AINDY:
			if (addr_mode_mask & AM_AINDY) {
				return opcode + 0x80;
			}
			break;
		case EIND:
			if (ext < ORTHO && (addr_mode_mask & AM_EIND|AM_EIND2)) {
				const int eind_type = ((addr_mode_mask & AM_EIND2) != 0);
				switch (eind_type) {
					case 0: return (ext == EXT) ? opcode+0x14 : opcode+0x10;
					case 1: return (ext == EXT) ? opcode+0x01 : eind_base_ops[get_eind(inst_id)];
				}
			}
			break;
		case ORTHO_EXT:
			if (addr_mode_mask & AM_ORTHO|AM_ORTHO2) {
				return (inst_ext == EXT) ? ext_ortho_ops[get_ext_ortho(inst_id)] : opcode;
			}
			break;
		case IMM:
			if (addr_mode_mask & AM_IMM) {
				return opcode;
			}
			break;
		case IMPL:
			if (addr_mode_mask & AM_IMPL) {
				return opcode;
			}
			break;
		case REL:
			if (addr_mode_mask & AM_REL) {
				return opcode;
			}
			break;
		case BREG:
			if (addr_mode_mask & AM_BREG) {
				return opcode + 0x14;
			}
			break;
		default: break;
	}
	return 0xFF;
}

void set_opcode_bit(uint32_t *mask, int opcode) {
	const uint32_t o8 = opcode / 32, o8m = 1 << (opcode % 32);
	mask[o8] |= o8m;
}

void set_ortho_opcode_bits(uint32_t *mask, int opcode, int is_1op, int is_cc) {
	for (int i = 0; i < ((is_cc) ? 8 : 1); ++i, opcode += (is_cc) ? 0x20 : 0) {
		for (int j = 0; j < 4-is_1op; j += 1+is_1op) {
			set_opcode_bit(mask, opcode | (j << 3));
		}
	}
}

void search_inst_table_entry(const instruction *inst, uint32_t *mask, uint32_t addr_modes, int inst_ext, int ext, uint8_t inst_id) {
	addr_modes &= inst->am;
	switch (ext) {
		case BASE: addr_modes &= ~(AM_ORTHO|AM_ORTHO2|AM_EIND|AM_EIND2); break;
		case EXT : addr_modes &= (inst_ext == BASE) ? (AM_EIND|AM_EIND2) : ~(AM_ORTHO|AM_ORTHO2); break;
	}
	for (uint32_t i = addr_modes; i; i &= ~get_msb(i)) {
		const uint8_t opcode = get_opcode(inst, get_addr_mode_type(i), inst_ext, ext, inst_id);
		const uint32_t o8 = opcode / 32, o8m = 1 << (opcode % 32);
		if (opcode == 0xFF) {
			continue;
		}

		if (ext == ORTHO) {
			const int is_1op = (inst->am & AM_ORTHO2) == AM_ORTHO2;
			const int is_cc = (inst_ext == ORTHO && inst_id == SET);
			set_ortho_opcode_bits(mask, opcode, is_1op, is_cc);
		} else {
			set_opcode_bit(mask, opcode);
		}

		/*printf("table: %i, i: %2i, j: 0x%08X, mask: {", table, i, j);
		for (int k = mask_size-1; k >= 0; --k) {
			printf("0x%08X%s", mask[k], (k) ? ", " : "}\n");
		}*/
	}
}

int print_mask(uint32_t addr_modes, instruction_id *inst_ids, int ext) {
	char *str = calloc(format_len("t(0, 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X)\n", 0, 1, 2, 3, 4, 5, 6, 7) + 1, sizeof(char));
	char *tmp = str;
	uint32_t mask[8] = {};
	const size_t mask_size = sizeof(mask) / sizeof(uint32_t);
	const uint32_t max_addr_mode_mask = -(uint32_t)1 >> (32-AMT_LEN);
	addr_modes = (addr_modes & ~max_addr_mode_mask) ? max_addr_mode_mask : addr_modes;

	if (ext > ORTHO) {
		failed("print_mask()", "Supplied extension is invalid, because it's out of the intended bounds.");
		free(str);
		tmp = NULL;
		str = NULL;
		return 0;
	}

	if (inst_ids == NULL) {
		for (int table = 0; table <= ext; ++table) {
			int max_ops = 0;
			const uint32_t addr_mode_mask = (ext && table < ext) ? ((ext == EXT) ? AM_EIND|AM_EIND2 : AM_ORTHO|AM_ORTHO2) : addr_modes;
			const instruction *inst_table;

			switch (ext) {
				case BASE: inst_table = inst, max_ops = OPNUM; break;
				case EXT: inst_table = ext_inst, max_ops = EXT_OPNUM; break;
				case ORTHO: inst_table = ortho_inst, max_ops = ORTHO_OPNUM; break;
			}

			for (int i = 0; i < max_ops; ++i) {
				if (inst_table[i].am & addr_mode_mask) {
					search_inst_table_entry(&inst_table[i], mask, addr_modes, table, ext, i);
					#if 0
					for (uint32_t j = addr_modes; j; j &= ~get_msb(j)) {
						const uint8_t opcode = get_opcode(&inst_table[i], get_addr_mode_type(j), table, ext, i);
						const uint32_t o8 = opcode / 32, o8m = 1 << (opcode % 32);
						if (opcode == 0xFF) {
							continue;
						}

						if (ext == 2) {
							const int is_1op = (inst[i].am & AM_ORTHO2) == AM_ORTHO2;
							const int is_cc = (table == ORTHO && i == SET);
							set_ortho_opcode_bits(mask, opcode, is_1op, is_cc);
						} else {
							set_opcode_bit(mask, opcode);
						}

						/*printf("table: %i, i: %2i, j: 0x%08X, mask: {", table, i, j);
						for (int k = mask_size-1; k >= 0; --k) {
							printf("0x%08X%s", mask[k], (k) ? ", " : "}\n");
						}*/
					}
					#endif
				}
			}
		}
	} else {
		for (int i = 0; inst_ids[i].ext >= BASE; ++i) {
			const uint32_t addr_mode_mask = (ext && inst_ids[i].ext < ext) ? ((ext == EXT) ? AM_EIND|AM_EIND2 : AM_ORTHO|AM_ORTHO2) : addr_modes;
			const instruction *inst_entry;
			switch (inst_ids[i].ext) {
				case BASE : inst_entry = &inst[inst_ids[i].id]; break;
				case EXT  : inst_entry = &ext_inst[inst_ids[i].id]; break;
				case ORTHO: inst_entry = &ortho_inst[inst_ids[i].id]; break;
			}

			if (inst_entry->am & addr_mode_mask) {
				search_inst_table_entry(inst_entry, mask, addr_modes, inst_ids[i].ext, ext, inst_ids[i].id);
			}
		}
	}

	tmp += sprintf(tmp, "t(0, ");
	for (int i = mask_size-1; i >= 0; --i) {
		tmp += sprintf(tmp, "0x%08X%s", mask[i], (i) ? ", " : ")\n");
	}

	printf("%s", str);

	free(str);
	tmp = NULL;
	str = NULL;
	return 1;
}

int get_delm_span(const char *str, const char *delm) {
	const int inv_span_len = strcspn(str, delm);
	return inv_span_len + strspn(&str[inv_span_len], delm);
}

int get_csv_len(const char *str) {
	int ret = 0;
	for (int i = 0; str[i] != '\0'; i += get_delm_span(&str[i], ", "), ++ret);
	return ret;
}

void free_csv_list(char **list) {
	for (int i = 0; list[i] != NULL; ++i) {
		free(list[i]);
		list[i] = NULL;
	}
}

char **parse_csv_list(const char *str) {
	const char *delm = ", ";
	char **list = calloc(get_csv_len(str)+1, sizeof(char *));
	for (int i = 0, j = 0; str[i] != '\0'; i += get_delm_span(&str[i], delm), ++j) {
		const int len = strcspn(&str[i], delm);
		list[j] = calloc(len+1, sizeof(char));
		memcpy(list[j], &str[i], len);
	}
	return list;
}

void set_extension(int *ext, int ext2, int force, const char *reason, ...) {
	int dummy = -1;
	ext = (ext != NULL) ? ext : &dummy;
	if (*ext < ext2 || *ext < BASE || force) {
		va_list ap;
		printf("Switching extension from %s, to %s. ", (*ext < BASE || *ext >= EXT_LEN) ? ext_names[*ext] : "auto", ext_names[ext2]);
		va_start(ap, reason);
		vprint_reason(reason, ap);
		va_end(ap);
		*ext = ext2;
	}
}

uint32_t get_addr_mode_bits(const char **list, int *ext) {
	const int is_inv = (list[0][0] == '~');
	const uint32_t ext_mask = (AM_ORTHO|AM_ORTHO2|AM_EIND|AM_EIND2|AM_AIND|AM_AINDX|AM_AINDY);
	const uint32_t max_addr_mode_mask = -(uint32_t)1 >> (32-AMT_LEN);
	int is_ext = 0;
	uint32_t addr_modes = 0;
	uint32_t bits = 0;

	for (int i = 0; list[i] != NULL; ++i) {
		const int inv = (!i) ? is_inv : 0;
		const char *str = list[i]+inv;
		for (int j = 0; j < AMT_LEN; ++j) {
			if (!strcasecmp(str, adrmode[j])) {
				//printf("i: %i, str: %s, adrmode: %s\n", i, str, adrmode[i]);
				bits |= (1 << j);
			}
		}
	}

	is_ext = (bits & ext_mask) ? 1 : is_ext;
	addr_modes |= (is_inv) ? ~(bits) & (max_addr_mode_mask & ((is_ext) ? -1 : ~ext_mask)) : bits;
	addr_modes &= (is_ext && (bits & ~(AM_ORTHO|AM_ORTHO2))) ? ~(AM_ORTHO|AM_ORTHO2) : -1;

	if (is_ext) {
		const int ext2 = (addr_modes & AM_ORTHO) ? ORTHO : EXT;
		const char *addr_mode_reason = (ext2 == ORTHO) ? "was set to ortho" : "is a base extension addressing mode";
		set_extension(ext, ext2, 1, "The addressing mode %s.\n", addr_mode_reason);
	}
	return addr_modes;
}

instruction_id *get_instruction_ids(const char **list, int *ext) {
	int has_failed = 0;
	char *fail_reason = NULL;
	instruction_id *inst_ids = NULL;
	int list_len = 0;
	if (list != NULL) {
		for (list_len = 0; list[list_len] != NULL; ++list_len);

		if (list_len == 0) {
			has_failed = 1;
			fail_reason = "Instruction list length is zero.";
		} else {
			inst_ids = calloc(list_len+1, sizeof(instruction_id));
			memset(inst_ids, -1, sizeof(instruction_id)*(list_len+1));
		}
	} else {
		has_failed = 1;
		fail_reason = "Instruction list is NULL.";
	}

	if (has_failed) {
		failed("get_instruction_ids()", "%s", fail_reason);
		return NULL;
	}

	for (int i = 0; list[i] != NULL; ++i) {
		for (int j = 0; j < EXT_LEN && inst_ids[i].ext < 0; ++j) {
			const char **table;
			switch (j) {
				case BASE : table = mne; break;
				case EXT  : table = ext_mne; break;
				case ORTHO: table = ortho_mne; break;
			}

			for (int k = 0; table[k] != NULL; ++k) {
				if (!strcasecmp(list[i], table[k])) {
					char *ext_str = NULL;
					inst_ids[i] = (instruction_id){.ext = j, .id = k};
					switch (j) {
						case BASE : ext_str = "Base ISA"; break;
						case EXT  : ext_str = "Base Extension"; break;
						case ORTHO: ext_str = "Ortho Extension"; break;
					}
					set_extension(ext, j, 0, "The instruction is from the %s.\n", ext_str);
					break;
				}
			}
		}
	}
	return inst_ids;
}

int get_extension_id(const char *str) {
	for (int i = 0; i < EXT_LEN; ++i) {
		if (!strcasecmp(str, ext_names[i])) {
			return i;
		}
	}
	return -1;
}

void usage(const char *name) {
	printf("Usage: %s -a <addr_mode>[,<addr_mode> ...] -i <instruction>[,<instruction> ...] -e <isa_extension>\n", name);
}

options *get_options(int argc, char **argv) {
	options *opts = calloc(1, sizeof(options));
	for (int i = 1; i < argc; ++i) {
		if (argv[i][0] == '-') {
			const char option = argv[i++][1];
			if (option == 'a' || option == 'i') {
				const char **list = (const char **)parse_csv_list(argv[i]);
				switch (option) {
					case 'a': opts->addr_modes = get_addr_mode_bits(list, &opts->ext); break;
					case 'i': opts->instr = get_instruction_ids(list, &opts->ext); break;
				}
				opts->addr_modes = (opts->instr != NULL && opts->addr_modes == 0) ? -1 : opts->addr_modes;
				free_csv_list((char **)list);
			} else if (option == 'e') {
				const int ext = get_extension_id(argv[i]);
				opts->ext = (opts->ext < ext) ? ext : opts->ext;
				opts->addr_modes = (opts->addr_modes == 0) ? -1 : opts->addr_modes;
			} else {
				failed(argv[0], "Invalid option \"-%c\".", option);
				usage(argv[0]);
				free(opts);
				return NULL;
			}
		}
	}
	return opts;
}

options *parse_args(int argc, char **argv) {
	if (argc == 1) {
		failed(argv[0], "No arguments.");
		usage(argv[0]);
		return NULL;
	}

	return get_options(argc, argv);
}

int main(int argc, char **argv) {
	int ret;
	char *reason = NULL;
	options *opts = parse_args(argc, argv);
	if (opts == NULL) {
		return 1;
	}
	if (!opts->addr_modes) {
		reason = "Addressing mode mask is zero.";
		ret = 1;
	} else {
		ret = !print_mask(opts->addr_modes, opts->instr, opts->ext);
	}

	if (ret != 0) {
		if (reason != NULL) {
			failed(argv[0], reason);
			usage(argv[0]);
		}
	}

	free(opts->instr);
	free(opts);
	return ret;
}