tv.c 43.5 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.
 */

Michael Beck's avatar
Michael Beck committed
20
21
22
23
24
25
26
27
/**
 * @file
 * @brief    Representation of and static computations on target machine
 *           values.
 * @date     2003
 * @author   Mathias Heil
 * @version  $Id$
 * @summary
28
 *
Michael Beck's avatar
Michael Beck committed
29
30
31
32
 * Values are stored in a format depending upon chosen arithmetic
 * module. Default uses strcalc and fltcalc.
 * This implementation assumes:
 *  - target has IEEE-754 floating-point arithmetic.
33
 */
Boris Boesler's avatar
Boris Boesler committed
34
35
36
37
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

38
#include <assert.h>         /* assertions */
Michael Beck's avatar
Michael Beck committed
39
#include <stdlib.h>         /* atoi() */
Michael Beck's avatar
Michael Beck committed
40
41
42
#ifdef HAVE_STRING_H
# include <string.h>         /* nice things for strings */
#endif
43
#ifdef HAVE_STRINGS_H
44
#include <strings.h>        /* strings.h also includes bsd only function strcasecmp */
45
#endif
Michael Beck's avatar
Michael Beck committed
46
47
48
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
49

50
51
52
#include "tv_t.h"
#include "set.h"            /* to store tarvals in */
#include "entity_t.h"       /* needed to store pointers to entities */
Michael Beck's avatar
Michael Beck committed
53
#include "irmode_t.h"
54
#include "irnode.h"         /* defines boolean return values (pnc_number)*/
55
56
#include "strcalc.h"
#include "fltcalc.h"
57
#include "irtools.h"
Michael Beck's avatar
Michael Beck committed
58
#include "xmalloc.h"
Michael Beck's avatar
Michael Beck committed
59
#include "firm_common.h"
60
#include "error.h"
Christian Schäfer's avatar
Christian Schäfer committed
61

Götz Lindenmaier's avatar
Götz Lindenmaier committed
62
63
/** Size of hash tables.  Should correspond to average number of distinct constant
    target values */
64
#define N_CONSTANTS 2048
Götz Lindenmaier's avatar
Götz Lindenmaier committed
65

66
67
/* get the integer overflow mode */
#define GET_OVERFLOW_MODE() int_overflow_mode
68
69

/* unused, float to int doesn't work yet */
70
enum float_to_int_mode {
Michael Beck's avatar
Michael Beck committed
71
72
	TRUNCATE,
	ROUND
73
74
};

75
76
77
78
79
#define GET_FLOAT_TO_INT_MODE() TRUNCATE

#define SWITCH_NOINFINITY 0
#define SWITCH_NODENORMALS 0

80
81
82
83
84
85
86
87
/****************************************************************************
 *   local definitions and macros
 ****************************************************************************/
#ifndef NDEBUG
#  define TARVAL_VERIFY(a) tarval_verify((a))
#else
#  define TARVAL_VERIFY(a) ((void)0)
#endif
Christian Schäfer's avatar
Christian Schäfer committed
88

89
90
#define INSERT_TARVAL(tv) ((tarval*)set_insert(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
#define FIND_TARVAL(tv) ((tarval*)set_find(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
91

92
93
#define INSERT_VALUE(val, size) (set_insert(values, (val), size, hash_val((val), size)))
#define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size)))
94

95
#define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
Michael Beck's avatar
Michael Beck committed
96

97
98
99
/****************************************************************************
 *   private variables
 ****************************************************************************/
100
101
static struct set *tarvals = NULL;   /* container for tarval structs */
static struct set *values = NULL;    /* container for values */
102
static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
103

104
105
/** if this is set non-zero, the constant folding for floating point is OFF */
static int no_float = 0;
Matthias Braun's avatar
Matthias Braun committed
106

107
108
109
110
111
112
113
/****************************************************************************
 *   private functions
 ****************************************************************************/
#ifndef NDEBUG
static int hash_val(const void *value, unsigned int length);
static int hash_tv(tarval *tv);
static void _fail_verify(tarval *tv, const char* file, int line)
Christian Schäfer's avatar
Christian Schäfer committed
114
{
Michael Beck's avatar
Michael Beck committed
115
116
117
118
119
120
	/* print a memory image of the tarval and throw an assertion */
	if (tv)
		printf("%s:%d: Invalid tarval:\n  mode: %s\n value: [%p]\n", file, line, get_mode_name(tv->mode), tv->value);
	else
		printf("%s:%d: Invalid tarval (null)", file, line);
	assert(0);
Christian Schäfer's avatar
Christian Schäfer committed
121
}
Till Riedel's avatar
Till Riedel committed
122
123
124
#ifdef __GNUC__
INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused));
#endif
Christian Schäfer's avatar
Christian Schäfer committed
125

Till Riedel's avatar
Till Riedel committed
126
INLINE static void tarval_verify(tarval *tv)
Christian Schäfer's avatar
Christian Schäfer committed
127
{
Michael Beck's avatar
Michael Beck committed
128
129
130
	assert(tv);
	assert(tv->mode);
	assert(tv->value);
Christian Schäfer's avatar
Christian Schäfer committed
131

Michael Beck's avatar
Michael Beck committed
132
133
	if ((tv == tarval_bad) || (tv == tarval_undefined)) return;
	if ((tv == tarval_b_true) || (tv == tarval_b_false)) return;
134

Michael Beck's avatar
Michael Beck committed
135
136
	if (!FIND_TARVAL(tv)) fail_verify(tv);
	if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
137

Michael Beck's avatar
Michael Beck committed
138
	return;
Christian Schäfer's avatar
Christian Schäfer committed
139
}
140
#endif /* NDEBUG */
Christian Schäfer's avatar
Christian Schäfer committed
141

142
143
/** Hash a tarval. */
static int hash_tv(tarval *tv) {
Michael Beck's avatar
Michael Beck committed
144
	return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
Christian Schäfer's avatar
Christian Schäfer committed
145
146
}

147
148
/** Hash a value. Treat it as a byte array. */
static int hash_val(const void *value, unsigned int length) {
Michael Beck's avatar
Michael Beck committed
149
150
	unsigned int i;
	unsigned int hash = 0;
151

Michael Beck's avatar
Michael Beck committed
152
153
154
155
156
	/* scramble the byte - array */
	for (i = 0; i < length; ++i) {
		hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i];
		hash += (hash << 11) ^ (hash >> 17);
	}
157

Michael Beck's avatar
Michael Beck committed
158
	return hash;
Christian Schäfer's avatar
Christian Schäfer committed
159
160
}

Michael Beck's avatar
Michael Beck committed
161
/** finds tarval with value/mode or creates new tarval */
Michael Beck's avatar
Michael Beck committed
162
163
164
165
166
167
168
169
170
static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
	tarval tv;

	tv.kind   = k_tarval;
	tv.mode   = mode;
	tv.length = length;
	if (length > 0) {
		/* if there already is such a value, it is returned, else value
		 * is copied into the set */
171
172
		char *temp = alloca(length);
		memcpy(temp, value, length);
173
		if (get_mode_arithmetic(mode) == irma_twos_complement) {
174
175
			sign_extend(temp, mode);
		}
176
		tv.value = INSERT_VALUE(temp, length);
Michael Beck's avatar
Michael Beck committed
177
178
179
180
181
182
	} else {
		tv.value = value;
	}
	/* if there is such a tarval, it is returned, else tv is copied
	 * into the set */
	return (tarval *)INSERT_TARVAL(&tv);
Christian Schäfer's avatar
Christian Schäfer committed
183
184
}

185
186
187
/**
 * handle overflow
 */
188
static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
Christian Schäfer's avatar
Christian Schäfer committed
189
{
190
191
	char *temp;

Michael Beck's avatar
Michael Beck committed
192
	switch (get_mode_sort(mode)) {
193
194
195
	case irms_reference:
		/* addresses always wrap around */
		temp = alloca(sc_get_buffer_length());
196
		memcpy(temp, value, sc_get_buffer_length());
197
		sc_truncate(get_mode_size_bits(mode), temp);
198
199
200
201
		/* the sc_ module expects that all bits are set ... */
		sign_extend(temp, mode);
		return get_tarval(temp, length, mode);

Michael Beck's avatar
Michael Beck committed
202
203
204
205
206
207
	case irms_int_number:
		if (sc_comp(value, get_mode_max(mode)->value) == 1) {
			switch (GET_OVERFLOW_MODE()) {
			case TV_OVERFLOW_SATURATE:
				return get_mode_max(mode);
			case TV_OVERFLOW_WRAP:
208
				temp = alloca(sc_get_buffer_length());
209
				memcpy(temp, value, sc_get_buffer_length());
210
				sc_truncate(get_mode_size_bits(mode), temp);
211
212
213
				/* the sc_ module expects that all bits are set ... */
				sign_extend(temp, mode);
				return get_tarval(temp, length, mode);
Michael Beck's avatar
Michael Beck committed
214
215
216
217
218
219
220
221
222
223
224
225
			case TV_OVERFLOW_BAD:
				return tarval_bad;
			default:
				return get_tarval(value, length, mode);
			}
		}
		if (sc_comp(value, get_mode_min(mode)->value) == -1) {
			switch (GET_OVERFLOW_MODE()) {
			case TV_OVERFLOW_SATURATE:
				return get_mode_min(mode);
			case TV_OVERFLOW_WRAP: {
				char *temp = alloca(sc_get_buffer_length());
226
				memcpy(temp, value, sc_get_buffer_length());
227
				sc_truncate(get_mode_size_bits(mode), temp);
Michael Beck's avatar
Michael Beck committed
228
229
230
231
232
233
234
235
236
237
238
239
				return get_tarval(temp, length, mode);
			}
			case TV_OVERFLOW_BAD:
				return tarval_bad;
			default:
				return get_tarval(value, length, mode);
			}
		}
		break;

	case irms_float_number:
		if (SWITCH_NOINFINITY && fc_is_inf(value)) {
240
241
			/* clip infinity to maximum value */
			return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
Michael Beck's avatar
Michael Beck committed
242
243
244
		}

		if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
245
			/* clip denormals to zero */
Michael Beck's avatar
Michael Beck committed
246
247
248
249
250
251
252
253
			return get_mode_null(mode);
		}
		break;

	default:
		break;
	}
	return get_tarval(value, length, mode);
Christian Schäfer's avatar
Christian Schäfer committed
254
255
}

256
/*
257
 *   public variables declared in tv.h
258
 */
259
static tarval reserved_tv[4];
260
261
262
263
264

tarval *tarval_bad       = &reserved_tv[0];
tarval *tarval_undefined = &reserved_tv[1];
tarval *tarval_b_false   = &reserved_tv[2];
tarval *tarval_b_true    = &reserved_tv[3];
Christian Schäfer's avatar
Christian Schäfer committed
265

266
/*
267
 *   public functions declared in tv.h
268
269
 */

270
271
272
273
274
/*
 * Constructors =============================================================
 */
tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
{
Michael Beck's avatar
Michael Beck committed
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
	assert(str);
	assert(len);
	assert(mode);

	switch (get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		assert(0);
		break;

	case irms_internal_boolean:
		/* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
		if (strcasecmp(str, "true")) return tarval_b_true;
		else if (strcasecmp(str, "false")) return tarval_b_true;
		else
			/* XXX This is C semantics */
			return atoi(str) ? tarval_b_true : tarval_b_false;

	case irms_float_number:
295
		switch (get_mode_size_bits(mode)) {
Michael Beck's avatar
Michael Beck committed
296
297
298
299
300
301
302
		case 32:
			fc_val_from_str(str, len, 8, 23, NULL);
			break;
		case 64:
			fc_val_from_str(str, len, 11, 52, NULL);
			break;
		case 80:
303
		case 96:
Michael Beck's avatar
Michael Beck committed
304
305
			fc_val_from_str(str, len, 15, 64, NULL);
			break;
306
307
		default:
			panic("Unsupported mode in new_tarval_from_str()");
Michael Beck's avatar
Michael Beck committed
308
309
310
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);

Michael Beck's avatar
Michael Beck committed
311
312
313
314
315
	case irms_reference:
		/* same as integer modes */
	case irms_int_number:
		sc_val_from_str(str, len, NULL, mode);
		return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
Michael Beck's avatar
Michael Beck committed
316
317
318
319
	}

	assert(0);  /* can't be reached, can it? */
	return NULL;
320
}
Christian Schäfer's avatar
Christian Schäfer committed
321

322
/*
323
 * helper function, create a tarval from long
324
 */
Michael Beck's avatar
Michael Beck committed
325
326
327
tarval *new_tarval_from_long(long l, ir_mode *mode) {
	assert(mode);

328
	switch (get_mode_sort(mode))   {
Michael Beck's avatar
Michael Beck committed
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
	case irms_internal_boolean:
		/* XXX C semantics ! */
		return l ? tarval_b_true : tarval_b_false ;

	case irms_reference:
		/* same as integer modes */
	case irms_int_number:
		sc_val_from_long(l, NULL);
		return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);

	case irms_float_number:
		return new_tarval_from_double((long double)l, mode);

	default:
		assert(0 && "unsupported mode sort");
	}
	return NULL;
Christian Schäfer's avatar
Christian Schäfer committed
346
}
Michael Beck's avatar
Michael Beck committed
347

348
/* returns non-zero if can be converted to long */
Michael Beck's avatar
Michael Beck committed
349
int tarval_is_long(tarval *tv) {
350
351
	if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
		return 0;
Michael Beck's avatar
Michael Beck committed
352

Matthias Braun's avatar
Matthias Braun committed
353
	if (get_mode_size_bits(tv->mode) > (int) (sizeof(long) << 3)) {
Michael Beck's avatar
Michael Beck committed
354
355
356
357
358
359
360
361
		/* the value might be too big to fit in a long */
		sc_max_from_bits(sizeof(long) << 3, 0, NULL);
		if (sc_comp(sc_get_buffer(), tv->value) == -1) {
			/* really doesn't fit */
			return 0;
		}
	}
	return 1;
362
}
Michael Beck's avatar
Michael Beck committed
363
364

/* this might overflow the machine's long, so use only with small values */
Michael Beck's avatar
Michael Beck committed
365
366
long get_tarval_long(tarval* tv) {
	assert(tarval_is_long(tv) && "tarval too big to fit in long");
Christian Schäfer's avatar
Christian Schäfer committed
367

Michael Beck's avatar
Michael Beck committed
368
	return sc_val_to_long(tv->value);
369
}
Christian Schäfer's avatar
Christian Schäfer committed
370

Michael Beck's avatar
Michael Beck committed
371
372
373
374
375
tarval *new_tarval_from_double(long double d, ir_mode *mode) {
	assert(mode && (get_mode_sort(mode) == irms_float_number));

	switch (get_mode_size_bits(mode)) {
	case 32:
Michael Beck's avatar
Michael Beck committed
376
		fc_val_from_ieee754(d, 8, 23, NULL);
Michael Beck's avatar
Michael Beck committed
377
378
		break;
	case 64:
Michael Beck's avatar
Michael Beck committed
379
		fc_val_from_ieee754(d, 11, 52, NULL);
Michael Beck's avatar
Michael Beck committed
380
381
		break;
	case 80:
382
	case 96:
Michael Beck's avatar
Michael Beck committed
383
		fc_val_from_ieee754(d, 15, 64, NULL);
Michael Beck's avatar
Michael Beck committed
384
		break;
385
386
	default:
		panic("Unsupported mode in new_tarval_from_double()");
Michael Beck's avatar
Michael Beck committed
387
388
	}
	return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
Christian Schäfer's avatar
Christian Schäfer committed
389
}
Michael Beck's avatar
Michael Beck committed
390

391
/* returns non-zero if can be converted to double */
Michael Beck's avatar
Michael Beck committed
392
393
int tarval_is_double(tarval *tv) {
	assert(tv);
Christian Schäfer's avatar
Christian Schäfer committed
394

Michael Beck's avatar
Michael Beck committed
395
	return (get_mode_sort(tv->mode) == irms_float_number);
396
}
Michael Beck's avatar
Michael Beck committed
397

Michael Beck's avatar
Michael Beck committed
398
399
long double get_tarval_double(tarval *tv) {
	assert(tarval_is_double(tv));
Christian Schäfer's avatar
Christian Schäfer committed
400

Michael Beck's avatar
Michael Beck committed
401
	return fc_val_to_ieee754(tv->value);
402
}
Christian Schäfer's avatar
Christian Schäfer committed
403

Matthias Heil's avatar
Matthias Heil committed
404

405
406
407
/*
 * Access routines for tarval fields ========================================
 */
Christian Schäfer's avatar
Christian Schäfer committed
408

Michael Beck's avatar
Michael Beck committed
409
410
/* get the mode of the tarval */
ir_mode *(get_tarval_mode)(const tarval *tv) {
Michael Beck's avatar
Michael Beck committed
411
	return _get_tarval_mode(tv);
412
413
}

414
415
416
417
418
419
420
/*
 * Special value query functions ============================================
 *
 * These functions calculate and return a tarval representing the requested
 * value.
 * The functions get_mode_{Max,Min,...} return tarvals retrieved from these
 * functions, but these are stored on initialization of the irmode module and
Michael Beck's avatar
Michael Beck committed
421
 * therefore the irmode functions should be preferred to the functions below.
422
 */
Christian Schäfer's avatar
Christian Schäfer committed
423

Michael Beck's avatar
Michael Beck committed
424
tarval *(get_tarval_bad)(void) {
Michael Beck's avatar
Michael Beck committed
425
	return _get_tarval_bad();
426
}
Michael Beck's avatar
Michael Beck committed
427
428

tarval *(get_tarval_undefined)(void) {
Michael Beck's avatar
Michael Beck committed
429
	return _get_tarval_undefined();
430
}
Michael Beck's avatar
Michael Beck committed
431
432

tarval *(get_tarval_b_false)(void) {
Michael Beck's avatar
Michael Beck committed
433
	return _get_tarval_b_false();
434
}
Michael Beck's avatar
Michael Beck committed
435
436

tarval *(get_tarval_b_true)(void) {
Michael Beck's avatar
Michael Beck committed
437
	return _get_tarval_b_true();
438
}
Michael Beck's avatar
Michael Beck committed
439

Michael Beck's avatar
Michael Beck committed
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
tarval *get_tarval_max(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		assert(0);
		break;

	case irms_internal_boolean:
		return tarval_b_true;

	case irms_float_number:
		switch(get_mode_size_bits(mode)) {
		case 32:
			fc_get_max(8, 23, NULL);
			break;
		case 64:
			fc_get_max(11, 52, NULL);
			break;
		case 80:
467
		case 96:
Michael Beck's avatar
Michael Beck committed
468
469
			fc_get_max(15, 64, NULL);
			break;
470
471
		default:
			panic("Unsupported mode in get_tarval_max()");
Michael Beck's avatar
Michael Beck committed
472
473
474
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);

475
476
477
478
	case irms_reference:
	case irms_int_number:
		sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
		return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
Michael Beck's avatar
Michael Beck committed
479
480
	}
	return tarval_bad;
481
482
}

Michael Beck's avatar
Michael Beck committed
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
tarval *get_tarval_min(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		assert(0);
		break;

	case irms_internal_boolean:
		return tarval_b_false;

	case irms_float_number:
		switch(get_mode_size_bits(mode)) {
		case 32:
			fc_get_min(8, 23, NULL);
			break;
		case 64:
			fc_get_min(11, 52, NULL);
			break;
		case 80:
510
		case 96:
Michael Beck's avatar
Michael Beck committed
511
512
			fc_get_min(15, 64, NULL);
			break;
513
514
		default:
			panic("Unsupported mode in get_tarval_min()");
Michael Beck's avatar
Michael Beck committed
515
516
517
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);

518
519
520
521
	case irms_reference:
	case irms_int_number:
		sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
		return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
Michael Beck's avatar
Michael Beck committed
522
523
	}
	return tarval_bad;
Christian Schäfer's avatar
Christian Schäfer committed
524
525
}

Michael Beck's avatar
Michael Beck committed
526
/** The bit pattern for the pointer NULL */
527
static long _null_value = 0;
528

Michael Beck's avatar
Michael Beck committed
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
tarval *get_tarval_null(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		assert(0);
		break;

	case irms_float_number:
		return new_tarval_from_double(0.0, mode);

547
	case irms_internal_boolean:
Michael Beck's avatar
Michael Beck committed
548
549
550
551
552
553
554
	case irms_int_number:
		return new_tarval_from_long(0l,  mode);

	case irms_reference:
		return new_tarval_from_long(_null_value, mode);
	}
	return tarval_bad;
Christian Schäfer's avatar
Christian Schäfer committed
555
556
}

Michael Beck's avatar
Michael Beck committed
557
558
559
560
561
tarval *get_tarval_one(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
562
		assert(0);
Michael Beck's avatar
Michael Beck committed
563
564
565
566
567
568
569
570
571
572
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		assert(0);
		break;

573
574
575
	case irms_internal_boolean:
		return tarval_b_true;

Michael Beck's avatar
Michael Beck committed
576
577
578
	case irms_float_number:
		return new_tarval_from_double(1.0, mode);

579
	case irms_reference:
Michael Beck's avatar
Michael Beck committed
580
581
582
583
	case irms_int_number:
		return new_tarval_from_long(1l, mode);
	}
	return tarval_bad;
Christian Schäfer's avatar
Christian Schäfer committed
584
585
}

586
tarval *get_tarval_all_one(ir_mode *mode) {
Michael Beck's avatar
Michael Beck committed
587
588
589
590
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
591
		assert(0);
Michael Beck's avatar
Michael Beck committed
592
593
594
595
596
597
598
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
599
600
601
602
		assert(0);
		return tarval_bad;

	case irms_int_number:
Michael Beck's avatar
Michael Beck committed
603
604
	case irms_internal_boolean:
	case irms_reference:
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
		return tarval_not(get_mode_null(mode));


	case irms_float_number:
		return new_tarval_from_double(1.0, mode);
	}
	return tarval_bad;
}

tarval *get_tarval_minus_one(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	switch(get_mode_sort(mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
	case irms_internal_boolean:
Michael Beck's avatar
Michael Beck committed
627
628
629
		assert(0);
		break;

630
631
632
	case irms_reference:
		return tarval_bad;

Michael Beck's avatar
Michael Beck committed
633
634
635
636
	case irms_float_number:
		return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;

	case irms_int_number:
637
		return new_tarval_from_long(-1l, mode);
Michael Beck's avatar
Michael Beck committed
638
639
	}
	return tarval_bad;
640
641
}

Michael Beck's avatar
Michael Beck committed
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
tarval *get_tarval_nan(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	if (get_mode_sort(mode) == irms_float_number) {
		switch(get_mode_size_bits(mode)) {
		case 32:
			fc_get_qnan(8, 23, NULL);
			break;
		case 64:
			fc_get_qnan(11, 52, NULL);
			break;
		case 80:
659
		case 96:
Michael Beck's avatar
Michael Beck committed
660
661
			fc_get_qnan(15, 64, NULL);
			break;
662
663
		default:
			panic("Unsupported mode in get_tarval_nan()");
Michael Beck's avatar
Michael Beck committed
664
665
666
667
668
669
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
	} else {
		assert(0 && "tarval is not floating point");
		return tarval_bad;
	}
Christian Schäfer's avatar
Christian Schäfer committed
670
671
}

Michael Beck's avatar
Michael Beck committed
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
tarval *get_tarval_plus_inf(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	if (get_mode_sort(mode) == irms_float_number) {
		switch(get_mode_size_bits(mode)) {
		case 32:
			fc_get_plusinf(8, 23, NULL);
			break;
		case 64:
			fc_get_plusinf(11, 52, NULL);
			break;
		case 80:
689
		case 96:
Michael Beck's avatar
Michael Beck committed
690
691
			fc_get_plusinf(15, 64, NULL);
			break;
692
693
		default:
			panic("Unsupported mode in get_tarval_plus_inf()");
Michael Beck's avatar
Michael Beck committed
694
695
696
697
698
699
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
	} else {
		assert(0 && "tarval is not floating point");
		return tarval_bad;
	}
Christian Schäfer's avatar
Christian Schäfer committed
700
701
}

Michael Beck's avatar
Michael Beck committed
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
tarval *get_tarval_minus_inf(ir_mode *mode) {
	assert(mode);

	if (get_mode_n_vector_elems(mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	if (get_mode_sort(mode) == irms_float_number) {
		switch(get_mode_size_bits(mode)) {
		case 32:
			fc_get_minusinf(8, 23, NULL);
			break;
		case 64:
			fc_get_minusinf(11, 52, NULL);
			break;
		case 80:
719
		case 96:
Michael Beck's avatar
Michael Beck committed
720
721
			fc_get_minusinf(15, 64, NULL);
			break;
722
723
		default:
			panic("Unsupported mode in get_tarval_minus_inf()");
Michael Beck's avatar
Michael Beck committed
724
725
726
727
728
729
		}
		return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
	} else {
		assert(0 && "tarval is not floating point");
		return tarval_bad;
	}
730
731
}

732
733
734
/*
 * Arithmethic operations on tarvals ========================================
 */
Christian Schäfer's avatar
Christian Schäfer committed
735

Michael Beck's avatar
Michael Beck committed
736
737
738
/*
 * test if negative number, 1 means 'yes'
 */
Michael Beck's avatar
Michael Beck committed
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
int tarval_is_negative(tarval *a) {
	assert(a);

	if (get_mode_n_vector_elems(a->mode) > 1) {
		/* vector arithmetic not implemented yet */
		assert(0 && "tarval_is_negative is not allowed for vector modes");
		return 0;
	}

	switch (get_mode_sort(a->mode)) {
	case irms_int_number:
		if (!mode_is_signed(a->mode)) return 0;
		else
			return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;

	case irms_float_number:
755
		return fc_is_negative(a->value);
Michael Beck's avatar
Michael Beck committed
756
757
758
759
760

	default:
		assert(0 && "not implemented");
		return 0;
	}
Christian Schäfer's avatar
Christian Schäfer committed
761
762
}

Michael Beck's avatar
Michael Beck committed
763
764
765
/*
 * test if null, 1 means 'yes'
 */
Michael Beck's avatar
Michael Beck committed
766
int tarval_is_null(tarval *a) {
767
768
	return
		a != tarval_bad &&
769
		a == get_mode_null(get_tarval_mode(a));
Michael Beck's avatar
Michael Beck committed
770
771
}

Michael Beck's avatar
Michael Beck committed
772
773
774
/*
 * test if one, 1 means 'yes'
 */
Michael Beck's avatar
Michael Beck committed
775
int tarval_is_one(tarval *a) {
776
777
	return
		a != tarval_bad &&
778
		a == get_mode_one(get_tarval_mode(a));
779
}
Michael Beck's avatar
Michael Beck committed
780

781
782
783
784
int tarval_is_all_one(tarval *tv) {
	return
		tv != tarval_bad &&
		tv == get_mode_all_one(get_tarval_mode(tv));
Michael Beck's avatar
Michael Beck committed
785
786
}

Michael Beck's avatar
Michael Beck committed
787
788
789
790
791
792
/*
 * test if one, 1 means 'yes'
 */
int tarval_is_minus_one(tarval *a) {
	return
		a != tarval_bad &&
793
		a == get_mode_minus_one(get_tarval_mode(a));
Michael Beck's avatar
Michael Beck committed
794
795
}

Michael Beck's avatar
Michael Beck committed
796
797
798
/*
 * comparison
 */
Michael Beck's avatar
Michael Beck committed
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
pn_Cmp tarval_cmp(tarval *a, tarval *b) {
	assert(a);
	assert(b);

	if (a == tarval_bad || b == tarval_bad) {
		assert(0 && "Comparison with tarval_bad");
		return pn_Cmp_False;
	}

	if (a == tarval_undefined || b == tarval_undefined)
		return pn_Cmp_False;

	if (a->mode != b->mode)
		return pn_Cmp_False;

	if (get_mode_n_vector_elems(a->mode) > 1) {
		/* vector arithmetic not implemented yet */
		assert(0 && "cmp not implemented for vector modes");
	}

	/* Here the two tarvals are unequal and of the same mode */
	switch (get_mode_sort(a->mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		if (a == b)
			return pn_Cmp_Eq;
		return pn_Cmp_False;

	case irms_float_number:
829
830
831
		/* it should be safe to enable this even if other arithmetic is disabled */
		/*if (no_float)
			return pn_Cmp_False;*/
Michael Beck's avatar
Michael Beck committed
832
833
834
835
836
837
838
839
840
841
842
		/*
		 * BEWARE: we cannot compare a == b here, because
		 * a NaN is always Unordered to any other value, even to itself!
		 */
		switch (fc_comp(a->value, b->value)) {
		case -1: return pn_Cmp_Lt;
		case  0: return pn_Cmp_Eq;
		case  1: return pn_Cmp_Gt;
		case  2: return pn_Cmp_Uo;
		default: return pn_Cmp_False;
		}
843
	case irms_reference:
Michael Beck's avatar
Michael Beck committed
844
845
846
847
848
849
850
851
852
853
854
	case irms_int_number:
		if (a == b)
			return pn_Cmp_Eq;
		return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;

	case irms_internal_boolean:
		if (a == b)
			return pn_Cmp_Eq;
		return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
	}
	return pn_Cmp_False;
855
856
}

Michael Beck's avatar
Michael Beck committed
857
858
859
/*
 * convert to other mode
 */
860
tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
Michael Beck's avatar
Michael Beck committed
861
	char *buffer;
862
	fp_value *res;
Michael Beck's avatar
Michael Beck committed
863
864

	assert(src);
865
	assert(dst_mode);
Michael Beck's avatar
Michael Beck committed
866

867
	if (src->mode == dst_mode) return src;
Michael Beck's avatar
Michael Beck committed
868
869
870
871
872
873
874
875
876
877
878
879
880
881

	if (get_mode_n_vector_elems(src->mode) > 1) {
		/* vector arithmetic not implemented yet */
		return tarval_bad;
	}

	switch (get_mode_sort(src->mode)) {
	case irms_control_flow:
	case irms_memory:
	case irms_auxiliary:
		break;

		/* cast float to something */
	case irms_float_number:
882
		switch (get_mode_sort(dst_mode)) {
Michael Beck's avatar
Michael Beck committed
883
		case irms_float_number:
884
			switch (get_mode_size_bits(dst_mode)) {
Michael Beck's avatar
Michael Beck committed
885
886
887
888
889
890
891
			case 32:
				fc_cast(src->value, 8, 23, NULL);
				break;
			case 64:
				fc_cast(src->value, 11, 52, NULL);
				break;
			case 80:
892
			case 96:
Michael Beck's avatar
Michael Beck committed
893
894
895
				fc_cast(src->value, 15, 64, NULL);
				break;
			default:
896
				panic("Unsupported mode in tarval_convert_to()");
Michael Beck's avatar
Michael Beck committed
897
			}
898
			return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
Michael Beck's avatar
Michael Beck committed
899
900
901
902

		case irms_int_number:
			switch (GET_FLOAT_TO_INT_MODE()) {
			case TRUNCATE:
903
				res = fc_int(src->value, NULL);
Michael Beck's avatar
Michael Beck committed
904
905
				break;
			case ROUND:
906
				res = fc_rnd(src->value, NULL);
Michael Beck's avatar
Michael Beck committed
907
908
				break;
			default:
909
				panic("Unsupported float to int conversion mode in tarval_convert_to()");
Michael Beck's avatar
Michael Beck committed
910
911
				break;
			}
912
913
			buffer = alloca(sc_get_buffer_length());
			if (! fc_flt2int(res, buffer, dst_mode))
914
				return tarval_bad;
915
			return get_tarval(buffer, sc_get_buffer_length(), dst_mode);
Michael Beck's avatar
Michael Beck committed
916
917
918
919
920
921
922

		default:
			/* the rest can't be converted */
			return tarval_bad;
		}
		break;

923
	/* cast int/characters to something */
Michael Beck's avatar
Michael Beck committed
924
	case irms_int_number:
925
		switch (get_mode_sort(dst_mode)) {
926
927

		case irms_reference:
Michael Beck's avatar
Michael Beck committed
928
929
930
		case irms_int_number:
			buffer = alloca(sc_get_buffer_length());
			memcpy(buffer, src->value, sc_get_buffer_length());
931
932
			sign_extend(buffer, dst_mode);
			return get_tarval_overflow(buffer, src->length, dst_mode);
Michael Beck's avatar
Michael Beck committed
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948

		case irms_internal_boolean:
			/* XXX C semantics */
			if (src == get_mode_null(src->mode)) return tarval_b_false;
			else return tarval_b_true;

		case irms_float_number:
			/* XXX floating point unit does not understand internal integer
			 * representation, convert to string first, then create float from
			 * string */
			buffer = alloca(100);
			/* decimal string representation because hexadecimal output is
			 * interpreted unsigned by fc_val_from_str, so this is a HACK */
			snprintf(buffer, 100, "%s",
				sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
			buffer[100 - 1] = '\0';
949
			switch (get_mode_size_bits(dst_mode)) {
Michael Beck's avatar
Michael Beck committed
950
951
952
953
954
955
956
			case 32:
				fc_val_from_str(buffer, 0, 8, 23, NULL);
				break;
			case 64:
				fc_val_from_str(buffer, 0, 11, 52, NULL);
				break;
			case 80:
957
			case 96:
Michael Beck's avatar
Michael Beck committed
958
959
				fc_val_from_str(buffer, 0, 15, 64, NULL);
				break;
960
961
			default:
				panic("Unsupported mode in tarval_convert_to()");
Michael Beck's avatar
Michael Beck committed
962
			}
963
			return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
Michael Beck's avatar
Michael Beck committed
964
965
966
967
968
969
970

		default:
			break;
		}
		break;

	case irms_internal_boolean:
971
		/* beware: this is C semantic for the INTERNAL boolean mode */
972
973
		if (get_mode_sort(dst_mode) == irms_int_number)
			return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
Michael Beck's avatar
Michael Beck committed
974
975
976
		break;

	case irms_reference:
977
		if (get_mode_sort(dst_mode) == irms_int_number) {
978
979
			buffer = alloca(sc_get_buffer_length());
			memcpy(buffer, src->value, sc_get_buffer_length());
980
			sign_extend(buffer, src->mode);
981
			return get_tarval_overflow(buffer, src->length, dst_mode);
982
		}
Michael Beck's avatar
Michael Beck committed
983
984
985
986
		break;
	}

	return tarval_bad;
987
}
Christian Schäfer's avatar
Christian Schäfer committed
988

Michael Beck's avatar
Michael Beck committed
989
/*
990
991
 * bitwise negation
 */
Michael Beck's avatar
Michael Beck committed
992
993
994
995
996
997
998
999
tarval *tarval_not(tarval *a) {
	char *buffer;

	assert(a);

	/* works for vector mode without changes */

	switch (get_mode_sort(a->mode)) {
1000
	case irms_reference:
For faster browsing, not all history is shown. View entire blame