ia32_emitter.c 53.6 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.
 */

20
/**
21
 * @file
Christian Würdig's avatar
Christian Würdig committed
22
23
24
 * @brief       This file implements the ia32 node emitter.
 * @author      Christian Wuerdig, Matthias Braun
 * @version     $Id$
25
 */
26
#include "config.h"
Christian Würdig's avatar
Christian Würdig committed
27

Christian Würdig's avatar
Christian Würdig committed
28
29
#include <limits.h>

30
#include "xmalloc.h"
31
32
#include "tv.h"
#include "iredges.h"
Christian Würdig's avatar
Christian Würdig committed
33
34
35
36
#include "debug.h"
#include "irgwalk.h"
#include "irprintf.h"
#include "irop_t.h"
Christian Würdig's avatar
Christian Würdig committed
37
#include "irargs_t.h"
38
#include "irprog_t.h"
39
#include "iredges_t.h"
40
#include "execfreq.h"
41
#include "error.h"
Matthias Braun's avatar
Matthias Braun committed
42
#include "raw_bitset.h"
43
#include "dbginfo.h"
Christian Würdig's avatar
Christian Würdig committed
44

45
#include "../besched_t.h"
Christian Würdig's avatar
Christian Würdig committed
46
#include "../benode_t.h"
Michael Beck's avatar
Michael Beck committed
47
#include "../beabi.h"
48
#include "../be_dbgout.h"
Matthias Braun's avatar
Matthias Braun committed
49
50
#include "../beemitter.h"
#include "../begnuas.h"
51
#include "../beirg_t.h"
52
#include "../be_dbgout.h"
Christian Würdig's avatar
Christian Würdig committed
53

54
#include "ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
55
#include "gen_ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
56
#include "gen_ia32_regalloc_if.h"
57
58
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
Christian Würdig's avatar
Christian Würdig committed
59
#include "ia32_map_regs.h"
60
#include "ia32_architecture.h"
Christian Würdig's avatar
Christian Würdig committed
61
#include "bearch_ia32_t.h"
Christian Würdig's avatar
Christian Würdig committed
62

63
64
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)

65
#define BLOCK_PREFIX ".L"
Michael Beck's avatar
Michael Beck committed
66

Christian Würdig's avatar
Christian Würdig committed
67
68
#define SNPRINTF_BUF_LEN 128

69
70
static const ia32_isa_t *isa;
static ia32_code_gen_t  *cg;
71
static char              pic_base_label[128];
72
static ir_label_t        exc_label_id;
73
static int               mark_spill_reload = 0;
74
static int               do_pic;
75

76
77
78
79
80
81
/** Return the next block in Block schedule */
static ir_node *get_prev_block_sched(const ir_node *block)
{
	return get_irn_link(block);
}

82
/** Checks if the current block is a fall-through target. */
83
static int is_fallthrough(const ir_node *cfgpred)
84
85
86
{
	ir_node *pred;

Christoph Mallon's avatar
Christoph Mallon committed
87
	if (!is_Proj(cfgpred))
88
		return 1;
89
	pred = get_Proj_pred(cfgpred);
Christoph Mallon's avatar
Christoph Mallon committed
90
	if (is_ia32_SwitchJmp(pred))
91
		return 0;
92

93
	return 1;
94
95
}

96
97
98
99
/**
 * returns non-zero if the given block needs a label
 * because of being a jump-target (and not a fall-through)
 */
100
static int block_needs_label(const ir_node *block)
101
{
102
	int need_label = 1;
103
104
	int  n_cfgpreds = get_Block_n_cfgpreds(block);

105
106
107
	if (has_Block_entity(block))
		return 1;

108
	if (n_cfgpreds == 0) {
109
		need_label = 0;
110
	} else if (n_cfgpreds == 1) {
Christoph Mallon's avatar
Christoph Mallon committed
111
112
		ir_node *cfgpred       = get_Block_cfgpred(block, 0);
		ir_node *cfgpred_block = get_nodes_block(cfgpred);
113
114
115

		if (get_prev_block_sched(block) == cfgpred_block
				&& is_fallthrough(cfgpred)) {
116
			need_label = 0;
117
118
119
120
121
122
		}
	}

	return need_label;
}

Christian Würdig's avatar
Christian Würdig committed
123
/**
Christian Würdig's avatar
Christian Würdig committed
124
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
125
 */
126
static const arch_register_t *get_in_reg(const ir_node *irn, int pos)
127
{
128
129
	ir_node               *op;
	const arch_register_t *reg = NULL;
Christian Würdig's avatar
Christian Würdig committed
130
131
132
133
134
135
136

	assert(get_irn_arity(irn) > pos && "Invalid IN position");

	/* The out register of the operator at position pos is the
	   in register we need. */
	op = get_irn_n(irn, pos);

137
	reg = arch_get_irn_register(op);
Christian Würdig's avatar
Christian Würdig committed
138

Christian Würdig's avatar
Christian Würdig committed
139
	assert(reg && "no in register found");
140

Christoph Mallon's avatar
Christoph Mallon committed
141
	if (reg == &ia32_gp_regs[REG_GP_NOREG])
142
		panic("trying to emit noreg for %+F input %d", irn, pos);
143
144
145

	/* in case of unknown register: just return a valid register */
	if (reg == &ia32_gp_regs[REG_GP_UKNWN]) {
146
		const arch_register_req_t *req = arch_get_register_req(irn, pos);
147

Matthias Braun's avatar
Matthias Braun committed
148
		if (arch_register_req_is(req, limited)) {
149
			/* in case of limited requirements: get the first allowed register */
Matthias Braun's avatar
Matthias Braun committed
150
151
			unsigned idx = rbitset_next(req->limited, 0, 1);
			reg = arch_register_for_index(req->cls, idx);
152
		} else {
153
			/* otherwise get first register in class */
Matthias Braun's avatar
Matthias Braun committed
154
			reg = arch_register_for_index(req->cls, 0);
155
156
		}
	}
157

Christian Würdig's avatar
Christian Würdig committed
158
159
160
161
162
163
	return reg;
}

/**
 * Returns the register at out position pos.
 */
164
static const arch_register_t *get_out_reg(const ir_node *irn, int pos)
165
166
167
{
	ir_node               *proj;
	const arch_register_t *reg = NULL;
Christian Würdig's avatar
Christian Würdig committed
168
169
170
171
172
173
174

	/* 1st case: irn is not of mode_T, so it has only                 */
	/*           one OUT register -> good                             */
	/* 2nd case: irn is of mode_T -> collect all Projs and ask the    */
	/*           Proj with the corresponding projnum for the register */

	if (get_irn_mode(irn) != mode_T) {
175
		assert(pos == 0);
176
		reg = arch_get_irn_register(irn);
177
	} else if (is_ia32_irn(irn)) {
178
		reg = arch_irn_get_register(irn, pos);
179
	} else {
Christian Würdig's avatar
Christian Würdig committed
180
181
182
183
184
185
		const ir_edge_t *edge;

		foreach_out_edge(irn, edge) {
			proj = get_edge_src_irn(edge);
			assert(is_Proj(proj) && "non-Proj from mode_T node");
			if (get_Proj_proj(proj) == pos) {
186
				reg = arch_get_irn_register(proj);
Christian Würdig's avatar
Christian Würdig committed
187
188
189
190
191
192
				break;
			}
		}
	}

	assert(reg && "no out register found");
Christian Würdig's avatar
Christian Würdig committed
193
194
195
	return reg;
}

Michael Beck's avatar
Michael Beck committed
196
/**
197
 * Add a number to a prefix. This number will not be used a second time.
Michael Beck's avatar
Michael Beck committed
198
 */
199
200
static char *get_unique_label(char *buf, size_t buflen, const char *prefix)
{
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
}

/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

Michael Beck's avatar
Michael Beck committed
217
218
219
/**
 * Emit the name of the 8bit low register
 */
220
221
static void emit_8bit_register(const arch_register_t *reg)
{
222
	const char *reg_name = arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
223

224
225
226
227
228
	be_emit_char('%');
	be_emit_char(reg_name[1]);
	be_emit_char('l');
}

Michael Beck's avatar
Michael Beck committed
229
230
231
232
233
234
235
236
237
238
239
240
/**
 * Emit the name of the 8bit high register
 */
static void emit_8bit_register_high(const arch_register_t *reg)
{
	const char *reg_name = arch_register_get_name(reg);

	be_emit_char('%');
	be_emit_char(reg_name[1]);
	be_emit_char('h');
}

241
242
243
static void emit_16bit_register(const arch_register_t *reg)
{
	const char *reg_name = ia32_get_mapped_reg_name(isa->regs_16bit, reg);
Christian Würdig's avatar
Christian Würdig committed
244

245
246
	be_emit_char('%');
	be_emit_string(reg_name);
247
248
}

249
250
251
252
253
254
/**
 * emit a register, possible shortened by a mode
 *
 * @param reg   the register
 * @param mode  the mode of the register or NULL for full register
 */
255
256
257
258
static void emit_register(const arch_register_t *reg, const ir_mode *mode)
{
	const char *reg_name;

Christoph Mallon's avatar
Christoph Mallon committed
259
	if (mode != NULL) {
260
		int size = get_mode_size_bits(mode);
Christoph Mallon's avatar
Christoph Mallon committed
261
262
263
		switch (size) {
			case  8: emit_8bit_register(reg);  return;
			case 16: emit_16bit_register(reg); return;
264
		}
Christoph Mallon's avatar
Christoph Mallon committed
265
		assert(mode_is_float(mode) || size == 32);
266
267
268
	}

	reg_name = arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
269

270
271
	be_emit_char('%');
	be_emit_string(reg_name);
Christian Würdig's avatar
Christian Würdig committed
272
273
}

274
void ia32_emit_source_register(const ir_node *node, int pos)
275
{
Christoph Mallon's avatar
Christoph Mallon committed
276
	const arch_register_t *reg = get_in_reg(node, pos);
277

278
	emit_register(reg, NULL);
279
280
}

281
282
283
static void ia32_emit_entity(ir_entity *entity, int no_pic_adjust)
{
	set_entity_backend_marked(entity, 1);
284
	be_gas_emit_entity(entity);
285
286
287
288
289
290
291
292
293

	if (get_entity_owner(entity) == get_tls_type()) {
		if (get_entity_visibility(entity) == visibility_external_allocated) {
			be_emit_cstring("@INDNTPOFF");
		} else {
			be_emit_cstring("@NTPOFF");
		}
	}

294
	if (do_pic && !no_pic_adjust) {
295
296
297
298
299
300
301
302
303
304
305
306
		be_emit_char('-');
		be_emit_string(pic_base_label);
	}
}

static void emit_ia32_Immediate_no_prefix(const ir_node *node)
{
	const ia32_immediate_attr_t *attr = get_ia32_immediate_attr_const(node);

	if (attr->symconst != NULL) {
		if (attr->sc_sign)
			be_emit_char('-');
307
		ia32_emit_entity(attr->symconst, attr->no_pic_adjust);
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
	}
	if (attr->symconst == NULL || attr->offset != 0) {
		if (attr->symconst != NULL) {
			be_emit_irprintf("%+d", attr->offset);
		} else {
			be_emit_irprintf("0x%X", attr->offset);
		}
	}
}

static void emit_ia32_Immediate(const ir_node *node)
{
	be_emit_char('$');
	emit_ia32_Immediate_no_prefix(node);
}
323
324
325
326

void ia32_emit_8bit_source_register_or_immediate(const ir_node *node, int pos)
{
	const arch_register_t *reg;
Michael Beck's avatar
Michael Beck committed
327
	const ir_node         *in = get_irn_n(node, pos);
Christoph Mallon's avatar
Christoph Mallon committed
328
	if (is_ia32_Immediate(in)) {
329
330
331
332
333
334
335
336
		emit_ia32_Immediate(in);
		return;
	}

	reg = get_in_reg(node, pos);
	emit_8bit_register(reg);
}

Michael Beck's avatar
Michael Beck committed
337
338
339
340
341
342
void ia32_emit_8bit_high_source_register(const ir_node *node, int pos)
{
	const arch_register_t *reg = get_in_reg(node, pos);
	emit_8bit_register_high(reg);
}

343
344
345
346
347
348
349
350
351
352
353
354
355
void ia32_emit_16bit_source_register_or_immediate(const ir_node *node, int pos)
{
	const arch_register_t *reg;
	const ir_node         *in = get_irn_n(node, pos);
	if (is_ia32_Immediate(in)) {
		emit_ia32_Immediate(in);
		return;
	}

	reg = get_in_reg(node, pos);
	emit_16bit_register(reg);
}

356
357
358
359
360
361
362
void ia32_emit_dest_register(const ir_node *node, int pos)
{
	const arch_register_t *reg  = get_out_reg(node, pos);

	emit_register(reg, NULL);
}

363
364
365
366
367
368
369
void ia32_emit_dest_register_size(const ir_node *node, int pos)
{
	const arch_register_t *reg  = get_out_reg(node, pos);

	emit_register(reg, get_ia32_ls_mode(node));
}

370
371
372
373
374
375
376
377
void ia32_emit_8bit_dest_register(const ir_node *node, int pos)
{
	const arch_register_t *reg  = get_out_reg(node, pos);

	emit_register(reg, mode_Bu);
}

void ia32_emit_x87_register(const ir_node *node, int pos)
Christian Würdig's avatar
Christian Würdig committed
378
{
379
	const ia32_x87_attr_t *attr = get_ia32_x87_attr_const(node);
380

Matthias Braun's avatar
Matthias Braun committed
381
	assert(pos < 3);
382
383
	be_emit_char('%');
	be_emit_string(attr->x87[pos]->name);
384
}
Christian Würdig's avatar
Christian Würdig committed
385

Matthias Braun's avatar
Matthias Braun committed
386
static void ia32_emit_mode_suffix_mode(const ir_mode *mode)
387
{
388
389
390
391
392
	assert(mode_is_int(mode) || mode_is_reference(mode));
	switch (get_mode_size_bits(mode)) {
		case 8:  be_emit_char('b');     return;
		case 16: be_emit_char('w');     return;
		case 32: be_emit_char('l');     return;
Christoph Mallon's avatar
Christoph Mallon committed
393
394
		/* gas docu says q is the suffix but gcc, objdump and icc use ll
		 * apparently */
Matthias Braun's avatar
Matthias Braun committed
395
396
		case 64: be_emit_cstring("ll"); return;
	}
397
	panic("Can't output mode_suffix for %+F", mode);
Christian Würdig's avatar
Christian Würdig committed
398
399
}

400
void ia32_emit_mode_suffix(const ir_node *node)
401
402
{
	ir_mode *mode = get_ia32_ls_mode(node);
Christoph Mallon's avatar
Christoph Mallon committed
403
	if (mode == NULL)
Matthias Braun's avatar
Matthias Braun committed
404
405
		mode = mode_Iu;

406
	ia32_emit_mode_suffix_mode(mode);
407
408
}

409
void ia32_emit_x87_mode_suffix(const ir_node *node)
410
{
411
412
	ir_mode *mode;

413
	/* we only need to emit the mode on address mode */
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
	if (get_ia32_op_type(node) == ia32_Normal)
		return;

	mode = get_ia32_ls_mode(node);
	assert(mode != NULL);

	if (mode_is_float(mode)) {
		switch (get_mode_size_bits(mode)) {
			case 32: be_emit_char('s'); return;
			case 64: be_emit_char('l'); return;
			case 80:
			case 96: be_emit_char('t'); return;
		}
	} else {
		assert(mode_is_int(mode));
		switch (get_mode_size_bits(mode)) {
			case 16: be_emit_char('s');     return;
			case 32: be_emit_char('l');     return;
			/* gas docu says q is the suffix but gcc, objdump and icc use ll
			 * apparently */
			case 64: be_emit_cstring("ll"); return;
		}
436
	}
437
	panic("Can't output mode_suffix for %+F", mode);
438
439
}

440
static char get_xmm_mode_suffix(ir_mode *mode)
441
442
443
{
	assert(mode_is_float(mode));
	switch(get_mode_size_bits(mode)) {
Christoph Mallon's avatar
Christoph Mallon committed
444
445
446
	case 32: return 's';
	case 64: return 'd';
	default: panic("Invalid XMM mode");
447
448
449
	}
}

450
void ia32_emit_xmm_mode_suffix(const ir_node *node)
451
452
{
	ir_mode *mode = get_ia32_ls_mode(node);
453
	assert(mode != NULL);
454
455
	be_emit_char('s');
	be_emit_char(get_xmm_mode_suffix(mode));
456
457
}

458
void ia32_emit_xmm_mode_suffix_s(const ir_node *node)
459
460
461
{
	ir_mode *mode = get_ia32_ls_mode(node);
	assert(mode != NULL);
462
	be_emit_char(get_xmm_mode_suffix(mode));
463
464
}

465
void ia32_emit_extend_suffix(const ir_node *node)
466
{
467
	ir_mode *mode = get_ia32_ls_mode(node);
Christoph Mallon's avatar
Christoph Mallon committed
468
	if (get_mode_size_bits(mode) == 32)
469
		return;
Christoph Mallon's avatar
Christoph Mallon committed
470
	be_emit_char(mode_is_signed(mode) ? 's' : 'z');
471
	ia32_emit_mode_suffix_mode(mode);
Matthias Braun's avatar
Matthias Braun committed
472
473
}

474
void ia32_emit_source_register_or_immediate(const ir_node *node, int pos)
475
476
{
	ir_node *in = get_irn_n(node, pos);
Christoph Mallon's avatar
Christoph Mallon committed
477
	if (is_ia32_Immediate(in)) {
478
		emit_ia32_Immediate(in);
479
	} else {
480
481
482
		const ir_mode         *mode = get_ia32_ls_mode(node);
		const arch_register_t *reg  = get_in_reg(node, pos);
		emit_register(reg, mode);
483
484
485
	}
}

Christian Würdig's avatar
Christian Würdig committed
486
/**
487
 * Returns the target block for a control flow node.
Christian Würdig's avatar
Christian Würdig committed
488
 */
489
static ir_node *get_cfop_target_block(const ir_node *irn)
Christoph Mallon's avatar
Christoph Mallon committed
490
{
491
492
493
	assert(get_irn_mode(irn) == mode_X);
	return get_irn_link(irn);
}
Christian Würdig's avatar
Christian Würdig committed
494

495
496
497
498
499
/**
 * Emits a block label for the given block.
 */
static void ia32_emit_block_name(const ir_node *block)
{
500
501
502
	if (has_Block_entity(block)) {
		ir_entity *entity = get_Block_entity(block);
		be_gas_emit_entity(entity);
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
	} else {
		be_emit_cstring(BLOCK_PREFIX);
		be_emit_irprintf("%ld", get_irn_node_nr(block));
	}
}

/**
 * Emits the target label for a control flow node.
 */
static void ia32_emit_cfop_target(const ir_node *node)
{
	ir_node *block = get_cfop_target_block(node);
	ia32_emit_block_name(block);
}

/*
 * positive conditions for signed compares
 */
521
522
523
524
525
526
527
528
529
static const char *const cmp2condition_s[] = {
	NULL, /* always false */
	"e",  /* == */
	"l",  /* <  */
	"le", /* <= */
	"g",  /* >  */
	"ge", /* >= */
	"ne", /* != */
	NULL  /* always true */
530
531
532
533
534
};

/*
 * positive conditions for unsigned compares
 */
535
536
537
538
539
540
541
542
543
static const char *const cmp2condition_u[] = {
	NULL, /* always false */
	"e",  /* == */
	"b",  /* <  */
	"be", /* <= */
	"a",  /* >  */
	"ae", /* >= */
	"ne", /* != */
	NULL  /* always true */
544
545
};

Michael Beck's avatar
Michael Beck committed
546
547
548
/**
 * Emit the suffix for a compare instruction.
 */
549
550
551
552
static void ia32_emit_cmp_suffix(int pnc)
{
	const char *str;

553
554
555
556
	if (pnc == ia32_pn_Cmp_parity) {
		be_emit_char('p');
		return;
	}
557
558
	if (pnc & ia32_pn_Cmp_float || pnc & ia32_pn_Cmp_unsigned) {
		str = cmp2condition_u[pnc & 7];
559
	} else {
560
		str = cmp2condition_s[pnc & 7];
561
562
563
564
565
	}

	be_emit_string(str);
}

566
567
typedef enum ia32_emit_mod_t {
	EMIT_RESPECT_LS   = 1U << 0,
568
569
	EMIT_ALTERNATE_AM = 1U << 1,
	EMIT_LONG         = 1U << 2
570
571
} ia32_emit_mod_t;

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
/**
 * Emits address mode.
 */
void ia32_emit_am(const ir_node *node)
{
	ir_entity *ent       = get_ia32_am_sc(node);
	int        offs      = get_ia32_am_offs_int(node);
	ir_node   *base      = get_irn_n(node, n_ia32_base);
	int        has_base  = !is_ia32_NoReg_GP(base);
	ir_node   *index     = get_irn_n(node, n_ia32_index);
	int        has_index = !is_ia32_NoReg_GP(index);

	/* just to be sure... */
	assert(!is_ia32_use_frame(node) || get_ia32_frame_ent(node) != NULL);

	/* emit offset */
	if (ent != NULL) {
		const ia32_attr_t *attr = get_ia32_attr_const(node);
		if (is_ia32_am_sc_sign(node))
			be_emit_char('-');
		ia32_emit_entity(ent, attr->data.am_sc_no_pic_adjust);
	}

	/* also handle special case if nothing is set */
	if (offs != 0 || (ent == NULL && !has_base && !has_index)) {
		if (ent != NULL) {
			be_emit_irprintf("%+d", offs);
		} else {
			be_emit_irprintf("%d", offs);
		}
	}

	if (has_base || has_index) {
		be_emit_char('(');

		/* emit base */
		if (has_base) {
			const arch_register_t *reg = get_in_reg(node, n_ia32_base);
			emit_register(reg, NULL);
		}

		/* emit index + scale */
		if (has_index) {
			const arch_register_t *reg = get_in_reg(node, n_ia32_index);
			int scale;
			be_emit_char(',');
			emit_register(reg, NULL);

			scale = get_ia32_am_scale(node);
			if (scale > 0) {
				be_emit_irprintf(",%d", 1 << scale);
			}
		}
		be_emit_char(')');
	}
}

629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
/**
 * fmt  parameter               output
 * ---- ----------------------  ---------------------------------------------
 * %%                           %
 * %AM  <node>                  address mode of the node
 * %AR  const arch_register_t*  address mode of the node or register
 * %ASx <node>                  address mode of the node or source register x
 * %Dx  <node>                  destination register x
 * %I   <node>                  immediate of the node
 * %L   <node>                  control flow target of the node
 * %M   <node>                  mode suffix of the node
 * %P   int                     condition code
 * %R   const arch_register_t*  register
 * %Sx  <node>                  source register x
 * %s   const char*             string
 * %u   unsigned int            unsigned int
645
 * %d   signed int              signed int
646
647
648
 *
 * x starts at 0
 * # modifier for %ASx, %D and %S uses ls mode of node to alter register width
649
 * * modifier does not prefix immediates with $, but AM with *
650
 * l modifier for %lu and %ld
651
652
653
654
655
656
657
 */
static void ia32_emitf(const ir_node *node, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);

	for (;;) {
658
659
		const char      *start = fmt;
		ia32_emit_mod_t  mod   = 0;
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675

		while (*fmt != '%' && *fmt != '\n' && *fmt != '\0')
			++fmt;
		if (fmt != start) {
			be_emit_string_len(start, fmt - start);
		}

		if (*fmt == '\n') {
			be_emit_finish_line_gas(node);
			++fmt;
			if (*fmt == '\0')
				break;
			continue;
		}

		if (*fmt == '\0')
Christian Würdig's avatar
Christian Würdig committed
676
			break;
677
678

		++fmt;
679
680
681
682
683
		if (*fmt == '*') {
			mod |= EMIT_ALTERNATE_AM;
			++fmt;
		}

684
		if (*fmt == '#') {
685
			mod |= EMIT_RESPECT_LS;
686
			++fmt;
687
		}
688

689
690
691
692
693
		if (*fmt == 'l') {
			mod |= EMIT_LONG;
			++fmt;
		}

694
695
696
697
698
699
700
701
		switch (*fmt++) {
			case '%':
				be_emit_char('%');
				break;

			case 'A': {
				switch (*fmt++) {
					case 'M':
702
703
						if (mod & EMIT_ALTERNATE_AM)
							be_emit_char('*');
704

705
706
707
708
709
						ia32_emit_am(node);
						break;

					case 'R': {
						const arch_register_t *reg = va_arg(ap, const arch_register_t*);
710
711
						if (mod & EMIT_ALTERNATE_AM)
							be_emit_char('*');
712
713
714
715
716
717
718
719
720
721
						if (get_ia32_op_type(node) == ia32_AddrModeS) {
							ia32_emit_am(node);
						} else {
							emit_register(reg, NULL);
						}
						break;
					}

					case 'S':
						if (get_ia32_op_type(node) == ia32_AddrModeS) {
722
723
							if (mod & EMIT_ALTERNATE_AM)
								be_emit_char('*');
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
							ia32_emit_am(node);
							++fmt;
						} else {
							assert(get_ia32_op_type(node) == ia32_Normal);
							goto emit_S;
						}
						break;

					default: goto unknown;
				}
				break;
			}

			case 'D': {
				unsigned               pos;
				const arch_register_t *reg;

				if (*fmt < '0' || '9' <= *fmt)
					goto unknown;

				pos = *fmt++ - '0';
				reg = get_out_reg(node, pos);
746
				emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
747
748
749
750
				break;
			}

			case 'I':
751
752
753
				if (!(mod & EMIT_ALTERNATE_AM))
					be_emit_char('$');
				emit_ia32_Immediate_no_prefix(node);
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
				break;

			case 'L':
				ia32_emit_cfop_target(node);
				break;

			case 'M': {
				ia32_emit_mode_suffix_mode(get_ia32_ls_mode(node));
				break;
			}

			case 'P': {
				int pnc = va_arg(ap, int);
				ia32_emit_cmp_suffix(pnc);
				break;
			}

			case 'R': {
				const arch_register_t *reg = va_arg(ap, const arch_register_t*);
				emit_register(reg, NULL);
				break;
			}

emit_S:
			case 'S': {
				unsigned       pos;
				const ir_node *in;

				if (*fmt < '0' || '9' <= *fmt)
					goto unknown;

				pos = *fmt++ - '0';
				in  = get_irn_n(node, pos);
				if (is_ia32_Immediate(in)) {
788
789
790
					if (!(mod & EMIT_ALTERNATE_AM))
						be_emit_char('$');
					emit_ia32_Immediate_no_prefix(in);
791
				} else {
Michael Beck's avatar
Michael Beck committed
792
793
					const arch_register_t *reg;

794
795
					if (mod & EMIT_ALTERNATE_AM)
						be_emit_char('*');
Michael Beck's avatar
Michael Beck committed
796
					reg = get_in_reg(node, pos);
797
					emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
798
799
800
801
802
803
804
805
806
807
				}
				break;
			}

			case 's': {
				const char *str = va_arg(ap, const char*);
				be_emit_string(str);
				break;
			}

808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
			case 'u':
				if (mod & EMIT_LONG) {
					unsigned long num = va_arg(ap, unsigned long);
					be_emit_irprintf("%lu", num);
				} else {
					unsigned num = va_arg(ap, unsigned);
					be_emit_irprintf("%u", num);
				}
				break;

			case 'd':
				if (mod & EMIT_LONG) {
					long num = va_arg(ap, long);
					be_emit_irprintf("%ld", num);
				} else {
					int num = va_arg(ap, int);
					be_emit_irprintf("%d", num);
				}
826
827
828
829
				break;

			default:
unknown:
830
				panic("unknown format conversion in ia32_emitf()");
831
		}
832
833
834
835
836
837
838
839
840
841
842
843
844
845
	}

	va_end(ap);
}

/**
 * Emits registers and/or address mode of a binary operation.
 */
void ia32_emit_binop(const ir_node *node)
{
	if (is_ia32_Immediate(get_irn_n(node, n_ia32_binary_right))) {
		ia32_emitf(node, "%#S4, %#AS3");
	} else {
		ia32_emitf(node, "%#AS4, %#S3");
Christian Würdig's avatar
Christian Würdig committed
846
	}
847
848
}

849
850
851
/**
 * Emits registers and/or address mode of a binary operation.
 */
Christoph Mallon's avatar
Christoph Mallon committed
852
853
void ia32_emit_x87_binop(const ir_node *node)
{
854
	switch(get_ia32_op_type(node)) {
855
		case ia32_Normal:
856
			{
857
858
				const ia32_x87_attr_t *x87_attr = get_ia32_x87_attr_const(node);
				const arch_register_t *in1      = x87_attr->x87[0];
859
				const arch_register_t *in       = x87_attr->x87[1];
860
				const arch_register_t *out      = x87_attr->x87[2];
861

862
863
864
865
866
				if (out == NULL) {
					out = in1;
				} else if (out == in) {
					in = in1;
				}
867

868
869
870
871
				be_emit_char('%');
				be_emit_string(arch_register_get_name(in));
				be_emit_cstring(", %");
				be_emit_string(arch_register_get_name(out));
872
873
874
			}
			break;
		case ia32_AddrModeS:
875
			ia32_emit_am(node);
876
			break;
877
		case ia32_AddrModeD:
878
879
880
881
882
		default:
			assert(0 && "unsupported op type");
	}
}

Christian Würdig's avatar
Christian Würdig committed
883
884
885
/**
 * Emits registers and/or address mode of a unary operation.
 */
Christoph Mallon's avatar
Christoph Mallon committed
886
887
void ia32_emit_unop(const ir_node *node, int pos)
{
888
889
890
	char fmt[] = "%ASx";
	fmt[3] = '0' + pos;
	ia32_emitf(node, fmt);
Christian Würdig's avatar
Christian Würdig committed
891
892
}

Matthias Braun's avatar
Matthias Braun committed
893
894
895
896
897
898
static void emit_ia32_IMul(const ir_node *node)
{
	ir_node               *left    = get_irn_n(node, n_ia32_IMul_left);
	const arch_register_t *out_reg = get_out_reg(node, pn_ia32_IMul_res);

	/* do we need the 3-address form? */
Christoph Mallon's avatar
Christoph Mallon committed
899
	if (is_ia32_NoReg_GP(left) ||
Matthias Braun's avatar
Matthias Braun committed
900
			get_in_reg(node, n_ia32_IMul_left) != out_reg) {
901
902
903
		ia32_emitf(node, "\timul%M %#S4, %#AS3, %#D0\n");
	} else {
		ia32_emitf(node, "\timul%M %#AS4, %#S3\n");
Matthias Braun's avatar
Matthias Braun committed
904
905
906
	}
}

907
908
909
/**
 * walks up a tree of copies/perms/spills/reloads to find the original value
 * that is moved around
910
 */
911
912
static ir_node *find_original_value(ir_node *node)
{
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
	if (irn_visited(node))
		return NULL;

	mark_irn_visited(node);
	if (be_is_Copy(node)) {
		return find_original_value(be_get_Copy_op(node));
	} else if (be_is_CopyKeep(node)) {
		return find_original_value(be_get_CopyKeep_op(node));
	} else if (is_Proj(node)) {
		ir_node *pred = get_Proj_pred(node);
		if (be_is_Perm(pred)) {
			return find_original_value(get_irn_n(pred, get_Proj_proj(node)));
		} else if (be_is_MemPerm(pred)) {
			return find_original_value(get_irn_n(pred, get_Proj_proj(node) + 1));
		} else if (is_ia32_Load(pred)) {
			return find_original_value(get_irn_n(pred, n_ia32_Load_mem));
929
930
931
		} else {
			return node;
		}
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
	} else if (is_ia32_Store(node)) {
		return find_original_value(get_irn_n(node, n_ia32_Store_val));
	} else if (is_Phi(node)) {
		int i, arity;
		arity = get_irn_arity(node);
		for (i = 0; i < arity; ++i) {
			ir_node *in  = get_irn_n(node, i);
			ir_node *res = find_original_value(in);

			if (res != NULL)
				return res;
		}
		return NULL;
	} else {
		return node;
947
948
949
950
951
	}
}

static int determine_final_pnc(const ir_node *node, int flags_pos,
                               int pnc)
952
{
953
954
955
956
	ir_node           *flags = get_irn_n(node, flags_pos);
	const ia32_attr_t *flags_attr;
	flags = skip_Proj(flags);

Christoph Mallon's avatar
Christoph Mallon committed
957
	if (is_ia32_Sahf(flags)) {
958
		ir_node *cmp = get_irn_n(flags, n_ia32_Sahf_val);
Christoph Mallon's avatar
Christoph Mallon committed
959
		if (!(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
960
				|| is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp))) {
961
			inc_irg_visited(current_ir_graph);
962
			cmp = find_original_value(cmp);
963
			assert(cmp != NULL);
964
			assert(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
965
			       || is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp));
966
		}
967

968
		flags_attr = get_ia32_attr_const(cmp);
Christoph Mallon's avatar
Christoph Mallon committed
969
		if (flags_attr->data.ins_permuted)
970
971
			pnc = get_mirrored_pnc(pnc);
		pnc |= ia32_pn_Cmp_float;
Christoph Mallon's avatar
Christoph Mallon committed
972
	} else if (is_ia32_Ucomi(flags) || is_ia32_Fucomi(flags)
Matthias Braun's avatar
Matthias Braun committed
973
			|| is_ia32_Fucompi(flags)) {
974
975
		flags_attr = get_ia32_attr_const(flags);

Christoph Mallon's avatar
Christoph Mallon committed
976
		if (flags_attr->data.ins_permuted)
977
978
			pnc = get_mirrored_pnc(pnc);
		pnc |= ia32_pn_Cmp_float;
979
	} else {
980
981
		flags_attr = get_ia32_attr_const(flags);

Christoph Mallon's avatar
Christoph Mallon committed
982
		if (flags_attr->data.ins_permuted)
983
			pnc = get_mirrored_pnc(pnc);
Christoph Mallon's avatar
Christoph Mallon committed
984
		if (flags_attr->data.cmp_unsigned)
985
			pnc |= ia32_pn_Cmp_unsigned;
986
	}
987
988

	return pnc;
989
990
}

991
992
993
994
995
996
static pn_Cmp ia32_get_negated_pnc(pn_Cmp pnc)
{
	ir_mode *mode = pnc & ia32_pn_Cmp_float ? mode_F : mode_Iu;
	return get_negated_pnc(pnc, mode);
}

997
void ia32_emit_cmp_suffix_node(const ir_node *node,
998
999
                               int flags_pos)
{
1000
1001
	const ia32_attr_t *attr = get_ia32_attr_const(node);

Michael Beck's avatar
Michael Beck committed
1002
	pn_Cmp pnc = get_ia32_condcode(node);
1003
1004

	pnc = determine_final_pnc(node, flags_pos, pnc);
1005
1006
	if (attr->data.ins_permuted)
		pnc = ia32_get_negated_pnc(pnc);
1007

1008
	ia32_emit_cmp_suffix(pnc);
1009
}
1010

1011
1012
1013
1014
1015
1016
/**
 * Emits an exception label for a given node.
 */
static void ia32_emit_exc_label(const ir_node *node)
{
	be_emit_string(be_gas_insn_label_prefix());
1017
	be_emit_irprintf("%lu", get_ia32_exc_label_id(node));
1018
1019
}

1020
1021
1022
/**
 * Returns the Proj with projection number proj and NOT mode_M
 */
Christoph Mallon's avatar
Christoph Mallon committed
1023
1024
static ir_node *get_proj(const ir_node *node, long proj)
{
1025
1026
1027
	const ir_edge_t *edge;
	ir_node         *src;

1028
	assert(get_irn_mode(node) == mode_T && "expected mode_T node");
1029

1030
	foreach_out_edge(node, edge) {
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
		src = get_edge_src_irn(edge);

		assert(is_Proj(src) && "Proj expected");
		if (get_irn_mode(src) == mode_M)
			continue;

		if (get_Proj_proj(src) == proj)
			return src;
	}
	return NULL;
}

1043
static int can_be_fallthrough(const ir_node *node)
1044
1045
1046
1047
1048
1049
{
	ir_node *target_block = get_cfop_target_block(node);
	ir_node *block        = get_nodes_block(node);
	return get_prev_block_sched(target_block) == block;
}

Christian Würdig's avatar
Christian Würdig committed
1050
1051
1052
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
1053
static void emit_ia32_Jcc(const ir_node *node)
1054
{
1055
	int            need_parity_label = 0;
1056
1057
1058
	const ir_node *proj_true;
	const ir_node *proj_false;
	const ir_node *block;
Michael Beck's avatar
Michael Beck committed
1059
	pn_Cmp         pnc = get_ia32_condcode(node);
Christian Würdig's avatar
Christian Würdig committed
1060

1061
	pnc = determine_final_pnc(node, 0, pnc);
Christian Würdig's avatar
Christian Würdig committed
1062

1063
1064
1065
	/* get both Projs */
	proj_true = get_proj(node, pn_ia32_Jcc_true);
	assert(proj_true && "Jcc without true Proj");
1066

1067
1068
	proj_false = get_proj(node, pn_ia32_Jcc_false);
	assert(proj_false && "Jcc without false Proj");
1069

1070
	block      = get_nodes_block(node);
1071

1072
	if (can_be_fallthrough(proj_true)) {
1073
		/* exchange both proj's so the second one can be omitted */
1074
1075
		const ir_node *t = proj_true;

1076
1077
		proj_true  = proj_false;
		proj_false = t;
1078
		pnc        = ia32_get_negated_pnc(pnc);
1079
1080
	}

1081
1082
1083
1084
	if (pnc & ia32_pn_Cmp_float) {
		/* Some floating point comparisons require a test of the parity flag,
		 * which indicates that the result is unordered */
		switch (pnc & 15) {
1085
			case pn_Cmp_Uo: {
1086
				ia32_emitf(proj_true, "\tjp %L\n");
1087
				break;
1088
			}
1089
1090

			case pn_Cmp_Leg:
1091
				ia32_emitf(proj_true, "\tjnp %L\n");
1092
1093
1094
1095
				break;

			case pn_Cmp_Eq:
			case pn_Cmp_Lt:
1096
1097
1098
			case pn_Cmp_Le:
				/* we need a local label if the false proj is a fallthrough
				 * as the falseblock might have no label emitted then */
Michael Beck's avatar
Michael Beck committed
1099
				if (can_be_fallthrough(proj_false)) {
1100
					need_parity_label = 1;
1101
					ia32_emitf(proj_false, "\tjp 1f\n");
1102
				} else {
1103
					ia32_emitf(proj_false, "\tjp %L\n");
1104
				}
1105
				goto emit_jcc;
1106
1107
1108

			case pn_Cmp_Ug:
			case pn_Cmp_Uge:
1109
			case pn_Cmp_Ne:
1110
				ia32_emitf(proj_true, "\tjp %L\n");
1111
				goto emit_jcc;
1112
1113
1114
1115
1116
1117

			default:
				goto emit_jcc;
		}
	} else {
emit_jcc:
1118
		ia32_emitf(proj_true, "\tj%P %L\n", pnc);
1119
1120
	}

Christoph Mallon's avatar
Christoph Mallon committed
1121
	if (need_parity_label) {
Christoph Mallon's avatar