irmode.c 22.2 KB
Newer Older
Christian Würdig's avatar
Christian Würdig committed
1
/*
Michael Beck's avatar
Michael Beck committed
2
 * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
Christian Würdig's avatar
Christian Würdig committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 *
 * This file is part of libFirm.
 *
 * This file may be distributed and/or modified under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * Licensees holding valid libFirm Professional Edition licenses may use
 * this file in accordance with the libFirm Commercial License.
 * Agreement provided with the Software.
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */

Matthias Braun's avatar
Matthias Braun committed
20
21
22
23
24
/**
 * @file
 * @brief    Data modes of operations.
 * @author   Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Mathias Heil
 * @version  $Id$
Götz Lindenmaier's avatar
Götz Lindenmaier committed
25
 */
Matthias Braun's avatar
Matthias Braun committed
26
#include "config.h"
Boris Boesler's avatar
added    
Boris Boesler committed
27

Moritz Kroll's avatar
Moritz Kroll committed
28
29
#include <stdlib.h>
#include <string.h>
Michael Beck's avatar
Michael Beck committed
30

Moritz Kroll's avatar
Moritz Kroll committed
31
#include <stddef.h>
32

Moritz Kroll's avatar
Moritz Kroll committed
33
34
35
36
37
38
39
40
41
#include "irprog_t.h"
#include "irmode_t.h"
#include "ident.h"
#include "tv_t.h"
#include "obst.h"
#include "irhooks.h"
#include "irtools.h"
#include "array.h"
#include "error.h"
Christian Schäfer's avatar
Christian Schäfer committed
42

Michael Beck's avatar
Michael Beck committed
43
/** Obstack to hold all modes. */
44
static struct obstack modes;
Christian Schäfer's avatar
Christian Schäfer committed
45

Michael Beck's avatar
Michael Beck committed
46
/** The list of all currently existing modes. */
Matthias Braun's avatar
Matthias Braun committed
47
48
static ir_mode **mode_list;

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
const char *get_mode_arithmetic_name(ir_mode_arithmetic ari)
{
#define X(a)    case a: return #a
	switch (ari) {
		X(irma_uninitialized);
		X(irma_none);
		X(irma_twos_complement);
		X(irma_ones_complement);
		X(irma_int_BCD);
		X(irma_ieee754);
		X(irma_float_BCD);
		default: return "<unknown>";
	}
#undef X
}

65
/**
66
 * Compare modes that don't need to have their code field
67
 * correctly set
68
69
70
 *
 * TODO: Add other fields
 **/
71
static inline int modes_are_equal(const ir_mode *m, const ir_mode *n) {
72
73
74
75
76
77
78
79
	if (m == n) return 1;
	if (m->sort         == n->sort &&
		m->arithmetic   == n->arithmetic &&
		m->size         == n->size &&
		m->sign         == n->sign  &&
		m->modulo_shift == n->modulo_shift &&
		m->vector_elem  == n->vector_elem)
		return 1;
Christian Schäfer's avatar
Christian Schäfer committed
80

81
	return 0;
82
}
Matthias Heil's avatar
Matthias Heil committed
83

84
/**
85
 * searches the modes obstack for the given mode and returns
86
 * a pointer on an equal mode already in the array, NULL if
87
88
 * none found
 */
89
static ir_mode *find_mode(const ir_mode *m) {
Michael Beck's avatar
Michael Beck committed
90
91
	int i;
	for (i = ARR_LEN(mode_list) - 1; i >= 0; --i) {
Matthias Braun's avatar
Matthias Braun committed
92
		ir_mode *n = mode_list[i];
93
94
95
		if (modes_are_equal(n, m))
			return n;
	}
Michael Beck's avatar
Michael Beck committed
96
97
98
99
100
101
102
103
104
105
106
107
108
109
	return NULL;
}

#ifdef FIRM_STATISTICS
/* return the mode index, only needed for statistics */
int stat_find_mode_index(const ir_mode *m) {
	int i;
	for (i = ARR_LEN(mode_list) - 1; i >= 0; --i) {
		ir_mode *n = mode_list[i];
		if (modes_are_equal(n, m))
			return i;
	}
	return -1;
}
110

Michael Beck's avatar
Michael Beck committed
111
112
113
114
/* return the mode for a given index, only needed for statistics */
ir_mode *stat_mode_for_index(int idx) {
	if (0 <= idx  && idx < ARR_LEN(mode_list))
		return mode_list[idx];
115
	return NULL;
116
}
Michael Beck's avatar
Michael Beck committed
117
#endif
Christian Schäfer's avatar
Christian Schäfer committed
118

119
120
121
/**
 * sets special values of modes
 */
122
123
static void set_mode_values(ir_mode* mode) {
	switch (get_mode_sort(mode))    {
124
	case irms_reference:
125
126
127
128
129
130
131
	case irms_int_number:
	case irms_float_number:
		mode->min  = get_tarval_min(mode);
		mode->max  = get_tarval_max(mode);
		mode->null = get_tarval_null(mode);
		mode->one  = get_tarval_one(mode);
		mode->minus_one = get_tarval_minus_one(mode);
132
133
134
135
136
		if(get_mode_sort(mode) != irms_float_number) {
			mode->all_one = get_tarval_all_one(mode);
		} else {
			mode->all_one = tarval_bad;
		}
137
138
139
140
141
142
143
144
		break;

	case irms_internal_boolean:
		mode->min  = tarval_b_false;
		mode->max  = tarval_b_true;
		mode->null = tarval_b_false;
		mode->one  = tarval_b_true;
		mode->minus_one = tarval_bad;
145
		mode->all_one = tarval_b_true;
146
147
148
149
150
151
152
153
154
155
156
157
		break;

	case irms_auxiliary:
	case irms_memory:
	case irms_control_flow:
		mode->min  = tarval_bad;
		mode->max  = tarval_bad;
		mode->null = tarval_bad;
		mode->one  = tarval_bad;
		mode->minus_one = tarval_bad;
		break;
	}
158
}
159

160
161
162
/* * *
 * globals defined in irmode.h
 * * */
Matthias Heil's avatar
Matthias Heil committed
163

164
/* --- Predefined modes --- */
Christian Schäfer's avatar
Christian Schäfer committed
165

166
167
168
169
170
/* FIRM internal modes: */
ir_mode *mode_T;
ir_mode *mode_X;
ir_mode *mode_M;
ir_mode *mode_BB;
171
172
ir_mode *mode_ANY;
ir_mode *mode_BAD;
Christian Schäfer's avatar
Christian Schäfer committed
173

174
175
176
177
/* predefined numerical modes: */
ir_mode *mode_F;    /* float */
ir_mode *mode_D;    /* double */
ir_mode *mode_E;    /* long double */
Christian Schäfer's avatar
Christian Schäfer committed
178

179
180
181
182
183
184
185
186
ir_mode *mode_Bs;   /* integral values, signed and unsigned */
ir_mode *mode_Bu;   /* 8 bit */
ir_mode *mode_Hs;   /* 16 bit */
ir_mode *mode_Hu;
ir_mode *mode_Is;   /* 32 bit */
ir_mode *mode_Iu;
ir_mode *mode_Ls;   /* 64 bit */
ir_mode *mode_Lu;
187
188
ir_mode *mode_LLs;  /* 128 bit */
ir_mode *mode_LLu;
Christian Schäfer's avatar
Christian Schäfer committed
189

190
191
ir_mode *mode_b;
ir_mode *mode_P;
Michael Beck's avatar
fixed:    
Michael Beck committed
192
193

/* machine specific modes */
194
195
ir_mode *mode_P_code;   /**< machine specific pointer mode for code addresses */
ir_mode *mode_P_data;   /**< machine specific pointer mode for data addresses */
196

197
198
199
200
201
/* * *
 * functions defined in irmode.h
 * * */

/* JNI access functions */
202
203
204
205
206
207
208
209
210
211
212
213
ir_mode *get_modeT(void) { return mode_T; }
ir_mode *get_modeF(void) { return mode_F; }
ir_mode *get_modeD(void) { return mode_D; }
ir_mode *get_modeE(void) { return mode_E; }
ir_mode *get_modeBs(void) { return mode_Bs; }
ir_mode *get_modeBu(void) { return mode_Bu; }
ir_mode *get_modeHs(void) { return mode_Hs; }
ir_mode *get_modeHu(void) { return mode_Hu; }
ir_mode *get_modeIs(void) { return mode_Is; }
ir_mode *get_modeIu(void) { return mode_Iu; }
ir_mode *get_modeLs(void) { return mode_Ls; }
ir_mode *get_modeLu(void) { return mode_Lu; }
214
215
ir_mode *get_modeLLs(void){ return mode_LLs; }
ir_mode *get_modeLLu(void){ return mode_LLu; }
216
217
218
219
220
221
222
ir_mode *get_modeb(void) { return mode_b; }
ir_mode *get_modeP(void) { return mode_P; }
ir_mode *get_modeX(void) { return mode_X; }
ir_mode *get_modeM(void) { return mode_M; }
ir_mode *get_modeBB(void) { return mode_BB; }
ir_mode *get_modeANY(void) { return mode_ANY; }
ir_mode *get_modeBAD(void) { return mode_BAD; }
223

224

225
ir_mode *(get_modeP_code)(void) {
226
	return _get_modeP_code();
Michael Beck's avatar
Michael Beck committed
227
228
}

229
ir_mode *(get_modeP_data)(void) {
230
	return _get_modeP_data();
231
232
233
}

void set_modeP_code(ir_mode *p) {
234
235
	assert(mode_is_reference(p));
	mode_P_code = p;
236
237
238
}

void set_modeP_data(ir_mode *p) {
239
240
	assert(mode_is_reference(p));
	mode_P_data = p;
Michael Beck's avatar
Michael Beck committed
241
}
242

243
/**
244
245
246
 * Registers a new mode.
 *
 * @param new_mode  The new mode template.
247
 */
248
249
static ir_mode *register_mode(const ir_mode *new_mode) {
	ir_mode *mode = NULL;
250

251
	assert(new_mode);
252

253
254
	/* copy mode struct to modes array */
	mode = (ir_mode *)obstack_copy(&modes, new_mode, sizeof(*mode));
Matthias Braun's avatar
Matthias Braun committed
255
	ARR_APP1(ir_mode*, mode_list, mode);
256

257
	mode->kind = k_ir_mode;
258

259
260
	/* add the new mode to the irp list of modes */
	add_irp_mode(mode);
261

262
	set_mode_values(mode);
263

264
265
	hook_new_mode(new_mode, mode);
	return mode;
266
267
268
269
270
}

/*
 * Creates a new mode.
 */
271
272
ir_mode *new_ir_mode(const char *name, ir_mode_sort sort, int bit_size, int sign,
                     ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
273
{
274
275
276
277
278
279
280
	ir_mode mode_tmpl;
	ir_mode *mode = NULL;

	mode_tmpl.name         = new_id_from_str(name);
	mode_tmpl.sort         = sort;
	mode_tmpl.size         = bit_size;
	mode_tmpl.sign         = sign ? 1 : 0;
281
282
	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number ||
	                          mode_tmpl.sort == irms_reference) ? modulo_shift : 0;
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
	mode_tmpl.vector_elem  = 1;
	mode_tmpl.arithmetic   = arithmetic;
	mode_tmpl.link         = NULL;
	mode_tmpl.tv_priv      = NULL;

	mode = find_mode(&mode_tmpl);
	if (mode) {
		hook_new_mode(&mode_tmpl, mode);
		return mode;
	}

	/* sanity checks */
	switch (sort) {
	case irms_auxiliary:
	case irms_control_flow:
	case irms_memory:
	case irms_internal_boolean:
300
		panic("internal modes cannot be user defined");
301
302
303
304
305

	case irms_float_number:
	case irms_int_number:
	case irms_reference:
		mode = register_mode(&mode_tmpl);
306
		break;
307
	}
308
	assert(mode != NULL);
309
	return mode;
310
311
}

312
313
314
/*
 * Creates a new vector mode.
 */
315
316
ir_mode *new_ir_vector_mode(const char *name, ir_mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
                            ir_mode_arithmetic arithmetic, unsigned int modulo_shift)
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
	ir_mode mode_tmpl;
	ir_mode *mode = NULL;

	mode_tmpl.name         = new_id_from_str(name);
	mode_tmpl.sort         = sort;
	mode_tmpl.size         = bit_size * num_of_elem;
	mode_tmpl.sign         = sign ? 1 : 0;
	mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
	mode_tmpl.vector_elem  = num_of_elem;
	mode_tmpl.arithmetic   = arithmetic;
	mode_tmpl.link         = NULL;
	mode_tmpl.tv_priv      = NULL;

	mode = find_mode(&mode_tmpl);
	if (mode) {
		hook_new_mode(&mode_tmpl, mode);
		return mode;
	}

	if (num_of_elem <= 1) {
		assert(0 && "vector modes should have at least 2 elements");
		return NULL;
	}

	/* sanity checks */
	switch (sort) {
	case irms_auxiliary:
	case irms_control_flow:
	case irms_memory:
	case irms_internal_boolean:
348
		panic("internal modes cannot be user defined");
349
350

	case irms_reference:
351
		panic("only integer and floating point modes can be vectorized");
352
353

	case irms_float_number:
354
		panic("not yet implemented");
355
356
357
358

	case irms_int_number:
		mode = register_mode(&mode_tmpl);
	}
359
	assert(mode != NULL);
360
	return mode;
361
362
}

363
/* Functions for the direct access to all attributes of an ir_mode */
364
ident *(get_mode_ident)(const ir_mode *mode) {
365
	return _get_mode_ident(mode);
Christian Schäfer's avatar
Christian Schäfer committed
366
367
}

368
const char *get_mode_name(const ir_mode *mode) {
369
	return get_id_str(mode->name);
Christian Schäfer's avatar
Christian Schäfer committed
370
371
}

372
ir_mode_sort (get_mode_sort)(const ir_mode* mode) {
373
	return _get_mode_sort(mode);
Götz Lindenmaier's avatar
Götz Lindenmaier committed
374
375
}

376
unsigned (get_mode_size_bits)(const ir_mode *mode) {
377
	return _get_mode_size_bits(mode);
Christian Schäfer's avatar
Christian Schäfer committed
378
379
}

380
unsigned (get_mode_size_bytes)(const ir_mode *mode) {
381
	return _get_mode_size_bytes(mode);
Götz Lindenmaier's avatar
Götz Lindenmaier committed
382
383
}

384
int (get_mode_sign)(const ir_mode *mode) {
385
	return _get_mode_sign(mode);
386
387
}

388
ir_mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode) {
389
	return get_mode_arithmetic(mode);
390
391
}

392
393
394
395
396

/* Attribute modulo shift specifies for modes of kind irms_int_number
 *  whether shift applies modulo to value of bits to shift.  Asserts
 *  if mode is not irms_int_number.
 */
397
unsigned int (get_mode_modulo_shift)(const ir_mode *mode) {
398
	return _get_mode_modulo_shift(mode);
399
400
}

401
unsigned int (get_mode_n_vector_elems)(const ir_mode *mode) {
402
	return _get_mode_vector_elems(mode);
403
404
}

405
void *(get_mode_link)(const ir_mode *mode) {
406
	return _get_mode_link(mode);
407
408
}

409
void (set_mode_link)(ir_mode *mode, void *l) {
410
	_set_mode_link(mode, l);
411
412
}

413
tarval *get_mode_min(ir_mode *mode) {
414
415
	assert(mode);
	assert(mode_is_data(mode));
Christian Schäfer's avatar
Christian Schäfer committed
416

417
	return mode->min;
Christian Schäfer's avatar
Christian Schäfer committed
418
419
}

420
tarval *get_mode_max(ir_mode *mode) {
421
422
	assert(mode);
	assert(mode_is_data(mode));
Christian Schäfer's avatar
Christian Schäfer committed
423

424
	return mode->max;
Christian Schäfer's avatar
Christian Schäfer committed
425
426
}

427
tarval *get_mode_null(ir_mode *mode) {
428
	assert(mode);
429
	assert(mode_is_datab(mode));
Christian Schäfer's avatar
Christian Schäfer committed
430

431
	return mode->null;
Christian Schäfer's avatar
Christian Schäfer committed
432
433
}

434
tarval *get_mode_one(ir_mode *mode) {
435
	assert(mode);
Matthias Braun's avatar
Matthias Braun committed
436
	assert(mode_is_datab(mode));
Christian Schäfer's avatar
Christian Schäfer committed
437

438
	return mode->one;
Christian Schäfer's avatar
Christian Schäfer committed
439
440
}

441
tarval *get_mode_minus_one(ir_mode *mode) {
442
443
	assert(mode);
	assert(mode_is_data(mode));
Michael Beck's avatar
Michael Beck committed
444

445
	return mode->minus_one;
Michael Beck's avatar
Michael Beck committed
446
447
}

448
tarval *get_mode_all_one(ir_mode *mode) {
449
	assert(mode);
Matthias Braun's avatar
Matthias Braun committed
450
	assert(mode_is_datab(mode));
451
452
453
	return mode->all_one;
}

454
tarval *get_mode_infinite(ir_mode *mode) {
455
456
	assert(mode);
	assert(mode_is_float(mode));
457

458
	return get_tarval_plus_inf(mode);
Christian Schäfer's avatar
Christian Schäfer committed
459
460
}

461
tarval *get_mode_NAN(ir_mode *mode) {
462
463
	assert(mode);
	assert(mode_is_float(mode));
464

465
	return get_tarval_nan(mode);
Christian Schäfer's avatar
Christian Schäfer committed
466
467
}

Michael Beck's avatar
Michael Beck committed
468
int is_mode(const void *thing) {
Michael Beck's avatar
Michael Beck committed
469
	return get_kind(thing) == k_ir_mode;
470
471
}

472
int (mode_is_signed)(const ir_mode *mode) {
473
	return _mode_is_signed(mode);
Christian Schäfer's avatar
Christian Schäfer committed
474
475
}

476
int (mode_is_float)(const ir_mode *mode) {
477
	return _mode_is_float(mode);
Christian Schäfer's avatar
Christian Schäfer committed
478
479
}

480
int (mode_is_int)(const ir_mode *mode) {
481
	return _mode_is_int(mode);
Christian Schäfer's avatar
Christian Schäfer committed
482
483
}

484
int (mode_is_reference)(const ir_mode *mode) {
485
	return _mode_is_reference(mode);
486
487
}

488
int (mode_is_num)(const ir_mode *mode) {
489
	return _mode_is_num(mode);
Christian Schäfer's avatar
Christian Schäfer committed
490
491
}

492
int (mode_is_data)(const ir_mode *mode) {
493
	return _mode_is_data(mode);
Christian Schäfer's avatar
Christian Schäfer committed
494
495
}

496
int (mode_is_datab)(const ir_mode *mode) {
497
	return _mode_is_datab(mode);
Christian Schäfer's avatar
Christian Schäfer committed
498
499
}

500
int (mode_is_dataM)(const ir_mode *mode) {
501
	return _mode_is_dataM(mode);
Christian Schäfer's avatar
Christian Schäfer committed
502
}
503

504
int (mode_is_float_vector)(const ir_mode *mode) {
505
	return _mode_is_float_vector(mode);
506
507
}

508
int (mode_is_int_vector)(const ir_mode *mode) {
509
	return _mode_is_int_vector(mode);
Michael Beck's avatar
Michael Beck committed
510
511
}

512
/* Returns true if sm can be converted to lm without loss. */
513
int smaller_mode(const ir_mode *sm, const ir_mode *lm) {
514
	int sm_bits, lm_bits;
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

	assert(sm);
	assert(lm);

	if (sm == lm) return 1;

	sm_bits = get_mode_size_bits(sm);
	lm_bits = get_mode_size_bits(lm);

	switch (get_mode_sort(sm)) {
	case irms_int_number:
		switch (get_mode_sort(lm)) {
		case irms_int_number:
			if (get_mode_arithmetic(sm) != get_mode_arithmetic(lm))
				return 0;

			/* only two complement implemented */
			assert(get_mode_arithmetic(sm) == irma_twos_complement);

			/* integers are convertable if
			 *   - both have the same sign and lm is the larger one
			 *   - lm is the signed one and is at least two bits larger
			 *     (one for the sign, one for the highest bit of sm)
			 *   - sm & lm are two_complement and lm has greater or equal number of bits
			 */
			if (mode_is_signed(sm)) {
				if (!mode_is_signed(lm))
					return 0;
				return sm_bits <= lm_bits;
			} else {
				if (mode_is_signed(lm)) {
					return sm_bits < lm_bits;
				}
				return sm_bits <= lm_bits;
			}
			break;

		case irms_float_number:
			/* int to float works if the float is large enough */
			return 0;

		default:
			break;
		}
		break;

	case irms_float_number:
		if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
			if ( (get_mode_sort(lm) == irms_float_number)
				&& (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
				return 1;
		}
		break;

	case irms_reference:
Michael Beck's avatar
Michael Beck committed
570
		/* do exist machines out there with different pointer lengths ?*/
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
		return 0;

	case irms_internal_boolean:
		return mode_is_int(lm);

	default:
		break;
	}

	/* else */
	return 0;
}

/* Returns true if a value of mode sm can be converted into mode lm
   and backwards without loss. */
int values_in_mode(const ir_mode *sm, const ir_mode *lm) {
	int sm_bits, lm_bits;
Moritz Kroll's avatar
Moritz Kroll committed
588
	ir_mode_arithmetic arith;
589
590
591
592
593
594

	assert(sm);
	assert(lm);

	if (sm == lm) return 1;

Moritz Kroll's avatar
Moritz Kroll committed
595
596
597
	if (sm == mode_b)
		return mode_is_int(lm);

598
599
600
	sm_bits = get_mode_size_bits(sm);
	lm_bits = get_mode_size_bits(lm);

Moritz Kroll's avatar
Moritz Kroll committed
601
602
	arith = get_mode_arithmetic(sm);
	if (arith != get_mode_arithmetic(lm))
603
604
		return 0;

Moritz Kroll's avatar
Moritz Kroll committed
605
606
607
608
	switch (arith) {
		case irma_twos_complement:
		case irma_ieee754:
			return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
609

Moritz Kroll's avatar
Moritz Kroll committed
610
611
		default:
			return 0;
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
	}
}

/* Return the signed integer equivalent mode for an reference mode. */
ir_mode *get_reference_mode_signed_eq(ir_mode *mode) {
	assert(mode_is_reference(mode));
	return mode->eq_signed;
}

/* Sets the signed integer equivalent mode for an reference mode. */
void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode) {
	assert(mode_is_reference(ref_mode));
	assert(mode_is_int(int_mode));
	ref_mode->eq_signed = int_mode;
}

/* Return the unsigned integer equivalent mode for an reference mode. */
ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode) {
	assert(mode_is_reference(mode));
	return mode->eq_unsigned;
}

/* Sets the unsigned integer equivalent mode for an reference mode. */
void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode) {
	assert(mode_is_reference(ref_mode));
	assert(mode_is_int(int_mode));
	ref_mode->eq_unsigned = int_mode;
639
640
}

641
/* initialization, build the default modes */
642
void init_mode(void) {
643
	ir_mode newmode;
644

645
	obstack_init(&modes);
Matthias Braun's avatar
Matthias Braun committed
646
	mode_list = NEW_ARR_F(ir_mode*, 0);
647

648
	/* initialize predefined modes */
649

650
651
652
653
654
655
656
657
658
659
	/* Internal Modes */
	newmode.arithmetic   = irma_none;
	newmode.size         = 0;
	newmode.sign         = 0;
	newmode.modulo_shift = 0;
	newmode.vector_elem  = 0;
	newmode.eq_signed    = NULL;
	newmode.eq_unsigned  = NULL;
	newmode.link         = NULL;
	newmode.tv_priv      = NULL;
660

661
662
	/* Control Flow Modes*/
	newmode.sort    = irms_control_flow;
663

664
665
	/* Basic Block */
	newmode.name    = new_id_from_chars("BB", 2);
666
	mode_BB         = register_mode(&newmode);
667

668
669
	/* eXecution */
	newmode.name    = new_id_from_chars("X", 1);
670
	mode_X          = register_mode(&newmode);
671

672
673
	/* Memory Modes */
	newmode.sort    = irms_memory;
674

675
676
	/* Memory */
	newmode.name    = new_id_from_chars("M", 1);
677
	mode_M          = register_mode(&newmode);
678

679
680
	/* Auxiliary Modes */
	newmode.sort    = irms_auxiliary,
681

682
683
	/* Tuple */
	newmode.name    = new_id_from_chars("T", 1);
684
	mode_T          = register_mode(&newmode);
685

686
687
	/* ANY */
	newmode.name    = new_id_from_chars("ANY", 3);
688
	mode_ANY        = register_mode(&newmode);
689

690
691
	/* BAD */
	newmode.name    = new_id_from_chars("BAD", 3);
692
	mode_BAD        = register_mode(&newmode);
693

694
695
	/* Internal Boolean Modes */
	newmode.sort    = irms_internal_boolean;
696

697
698
	/* boolean */
	newmode.name    = new_id_from_chars("b", 1);
699
	mode_b          = register_mode(&newmode);
700

701
702
	/* Data Modes */
	newmode.vector_elem = 1;
703

704
705
706
	/* Float Number Modes */
	newmode.sort       = irms_float_number;
	newmode.arithmetic = irma_ieee754;
707

708
709
710
711
	/* float */
	newmode.name    = new_id_from_chars("F", 1);
	newmode.sign    = 1;
	newmode.size    = 32;
712
	mode_F          = register_mode(&newmode);
713

714
715
716
717
	/* double */
	newmode.name    = new_id_from_chars("D", 1);
	newmode.sign    = 1;
	newmode.size    = 64;
718
	mode_D          = register_mode(&newmode);
719

720
721
722
	/* extended */
	newmode.name    = new_id_from_chars("E", 1);
	newmode.sign    = 1;
Matthias Braun's avatar
Matthias Braun committed
723
724
725
	/* note that the tarval module is calculating with 80 bits, but we use
	 * 96 bits, as that is what will be stored to memory by most hardware */
	newmode.size    = 96;
726
	mode_E          = register_mode(&newmode);
727

728
729
730
	/* Integer Number Modes */
	newmode.sort         = irms_int_number;
	newmode.arithmetic   = irma_twos_complement;
731

732
733
734
735
736
	/* signed byte */
	newmode.name         = new_id_from_chars("Bs", 2);
	newmode.sign         = 1;
	newmode.size         = 8;
	newmode.modulo_shift = 32;
737
	mode_Bs              = register_mode(&newmode);
738

739
740
741
742
743
744
	/* unsigned byte */
	newmode.name         = new_id_from_chars("Bu", 2);
	newmode.arithmetic   = irma_twos_complement;
	newmode.sign         = 0;
	newmode.size         = 8;
	newmode.modulo_shift = 32;
745
	mode_Bu              = register_mode(&newmode);
746

747
748
749
750
751
	/* signed short integer */
	newmode.name         = new_id_from_chars("Hs", 2);
	newmode.sign         = 1;
	newmode.size         = 16;
	newmode.modulo_shift = 32;
752
	mode_Hs              = register_mode(&newmode);
753

754
755
756
757
758
	/* unsigned short integer */
	newmode.name         = new_id_from_chars("Hu", 2);
	newmode.sign         = 0;
	newmode.size         = 16;
	newmode.modulo_shift = 32;
759
	mode_Hu              = register_mode(&newmode);
760

761
762
763
764
765
	/* signed integer */
	newmode.name         = new_id_from_chars("Is", 2);
	newmode.sign         = 1;
	newmode.size         = 32;
	newmode.modulo_shift = 32;
766
	mode_Is              = register_mode(&newmode);
767

768
769
770
771
772
	/* unsigned integer */
	newmode.name         = new_id_from_chars("Iu", 2);
	newmode.sign         = 0;
	newmode.size         = 32;
	newmode.modulo_shift = 32;
773
	mode_Iu              = register_mode(&newmode);
774
775
776
777
778
779

	/* signed long integer */
	newmode.name         = new_id_from_chars("Ls", 2);
	newmode.sign         = 1;
	newmode.size         = 64;
	newmode.modulo_shift = 64;
780
	mode_Ls              = register_mode(&newmode);
781
782
783
784
785
786

	/* unsigned long integer */
	newmode.name         = new_id_from_chars("Lu", 2);
	newmode.sign         = 0;
	newmode.size         = 64;
	newmode.modulo_shift = 64;
787
	mode_Lu              = register_mode(&newmode);
788

789
790
791
792
793
	/* signed long long integer */
	newmode.name         = new_id_from_chars("LLs", 3);
	newmode.sign         = 1;
	newmode.size         = 128;
	newmode.modulo_shift = 128;
794
	mode_LLs             = register_mode(&newmode);
795
796
797
798
799
800

	/* unsigned long long integer */
	newmode.name         = new_id_from_chars("LLu", 3);
	newmode.sign         = 0;
	newmode.size         = 128;
	newmode.modulo_shift = 128;
801
	mode_LLu             = register_mode(&newmode);
802

803
804
	/* Reference Mode */
	newmode.sort       = irms_reference;
805
806
807
808
809
810
	newmode.arithmetic = irma_twos_complement;

	/* pointer */
	newmode.name         = new_id_from_chars("P", 1);
	newmode.sign         = 0;
	newmode.size         = 32;
811
	newmode.modulo_shift = 32;
812
813
	newmode.eq_signed    = mode_Is;
	newmode.eq_unsigned  = mode_Iu;
814
	mode_P               = register_mode(&newmode);
815
816
817
818

	/* set the machine specific modes to the predefined ones */
	mode_P_code = mode_P;
	mode_P_data = mode_P;
819
}
820

Michael Beck's avatar
Michael Beck committed
821
822
/* find a signed mode for an unsigned integer mode */
ir_mode *find_unsigned_mode(const ir_mode *mode) {
823
	ir_mode n = *mode;
824

825
826
827
828
829
	/* allowed for reference mode */
	if (mode->sort == irms_reference)
		n.sort = irms_int_number;

	assert(n.sort == irms_int_number);
830
831
	n.sign = 0;
	return find_mode(&n);
832
833
}

Michael Beck's avatar
Michael Beck committed
834
835
/* find an unsigned mode for a signed integer mode */
ir_mode *find_signed_mode(const ir_mode *mode) {
836
	ir_mode n = *mode;
837

838
839
840
	assert(mode->sort == irms_int_number);
	n.sign = 1;
	return find_mode(&n);
841
842
}

Michael Beck's avatar
Michael Beck committed
843
844
/* finds a integer mode with 2*n bits for an integer mode with n bits. */
ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
845
	ir_mode n = *mode;
Michael Beck's avatar
Michael Beck committed
846

847
	assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
Michael Beck's avatar
Michael Beck committed
848

849
850
	n.size = 2*mode->size;
	return find_mode(&n);
Michael Beck's avatar
Michael Beck committed
851
}
852

853
854
855
856
/*
 * Returns non-zero if the given mode honors signed zero's, i.e.,
 * a +0 and a -0 exists and handled differently.
 */
857
858
859
860
int mode_honor_signed_zeros(const ir_mode *mode) {
	/* for floating point, we know that IEEE 754 has +0 and -0,
	 * but always handles it identical.
	 */
Christian Würdig's avatar
Christian Würdig committed
861
862
863
	return
		mode->sort == irms_float_number &&
		mode->arithmetic != irma_ieee754;
864
865
}

866
867
868
869
870
/*
 * Returns non-zero if the given mode might overflow on unary Minus.
 *
 * This does NOT happen on IEEE 754.
 */
871
872
873
874
int mode_overflow_on_unary_Minus(const ir_mode *mode) {
	if (mode->sort == irms_float_number)
		return mode->arithmetic == irma_ieee754 ? 0 : 1;
	return 1;
875
876
}

Michael Beck's avatar
Michael Beck committed
877
/*
878
 * Returns non-zero if the mode has a reversed wrap-around
Michael Beck's avatar
Michael Beck committed
879
880
881
882
883
884
 * logic, especially (a + x) - x == a.
 *
 * This is normally true for integer modes, not for floating
 * point modes.
 */
int mode_wrap_around(const ir_mode *mode) {
885
886
	/* FIXME: better would be an extra mode property */
	return mode_is_int(mode);
Michael Beck's avatar
Michael Beck committed
887
888
}

889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
/*
 * Returns non-zero if the cast from mode src to mode dst is a
 * reinterpret cast (ie. only the bit pattern is reinterpreted,
 * no conversion is done)
 */
int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst) {
	ir_mode_arithmetic ma;

	if (src == dst)
		return 1;
	if (get_mode_size_bits(src) != get_mode_size_bits(dst))
		return 0;
	ma = get_mode_arithmetic(src);
	if (ma != get_mode_arithmetic(dst))
		return 0;

	return ma == irma_twos_complement || ma == irma_ones_complement;
}

908
void finish_mode(void) {
909
	obstack_free(&modes, 0);
Matthias Braun's avatar
Matthias Braun committed
910
	DEL_ARR_F(mode_list);
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933

	mode_T   = NULL;
	mode_X   = NULL;
	mode_M   = NULL;
	mode_BB  = NULL;
	mode_ANY = NULL;
	mode_BAD = NULL;

	mode_F   = NULL;
	mode_D   = NULL;
	mode_E   = NULL;

	mode_Bs  = NULL;
	mode_Bu  = NULL;
	mode_Hs  = NULL;
	mode_Hu  = NULL;
	mode_Is  = NULL;
	mode_Iu  = NULL;
	mode_Ls  = NULL;
	mode_Lu  = NULL;

	mode_b   = NULL;

934
	mode_P      = NULL;
935
936
	mode_P_code = NULL;
	mode_P_data = NULL;
937
}