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
72
static int               do_pic;
static char              pic_base_label[128];
73
static ir_label_t        exc_label_id;
74
static int               mark_spill_reload = 0;
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
105
	int  n_cfgpreds = get_Block_n_cfgpreds(block);

	if (n_cfgpreds == 0) {
106
		need_label = 0;
107
	} else if (n_cfgpreds == 1) {
Christoph Mallon's avatar
Christoph Mallon committed
108
109
		ir_node *cfgpred       = get_Block_cfgpred(block, 0);
		ir_node *cfgpred_block = get_nodes_block(cfgpred);
110
111
112

		if (get_prev_block_sched(block) == cfgpred_block
				&& is_fallthrough(cfgpred)) {
113
			need_label = 0;
114
115
116
117
118
119
		}
	}

	return need_label;
}

Christian Würdig's avatar
Christian Würdig committed
120
/**
Christian Würdig's avatar
Christian Würdig committed
121
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
122
 */
123
static const arch_register_t *get_in_reg(const ir_node *irn, int pos)
124
{
125
126
	ir_node               *op;
	const arch_register_t *reg = NULL;
Christian Würdig's avatar
Christian Würdig committed
127
128
129
130
131
132
133

	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);

134
	reg = arch_get_irn_register(op);
Christian Würdig's avatar
Christian Würdig committed
135

Christian Würdig's avatar
Christian Würdig committed
136
	assert(reg && "no in register found");
137

Christoph Mallon's avatar
Christoph Mallon committed
138
	if (reg == &ia32_gp_regs[REG_GP_NOREG])
139
		panic("trying to emit noreg for %+F input %d", irn, pos);
140
141
142

	/* in case of unknown register: just return a valid register */
	if (reg == &ia32_gp_regs[REG_GP_UKNWN]) {
143
		const arch_register_req_t *req = arch_get_register_req(irn, pos);
144

Matthias Braun's avatar
Matthias Braun committed
145
		if (arch_register_req_is(req, limited)) {
146
			/* in case of limited requirements: get the first allowed register */
Matthias Braun's avatar
Matthias Braun committed
147
148
			unsigned idx = rbitset_next(req->limited, 0, 1);
			reg = arch_register_for_index(req->cls, idx);
149
		} else {
150
			/* otherwise get first register in class */
Matthias Braun's avatar
Matthias Braun committed
151
			reg = arch_register_for_index(req->cls, 0);
152
153
		}
	}
154

Christian Würdig's avatar
Christian Würdig committed
155
156
157
158
159
160
	return reg;
}

/**
 * Returns the register at out position pos.
 */
161
static const arch_register_t *get_out_reg(const ir_node *irn, int pos)
162
163
164
{
	ir_node               *proj;
	const arch_register_t *reg = NULL;
Christian Würdig's avatar
Christian Würdig committed
165
166
167
168
169
170
171

	/* 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) {
172
		assert(pos == 0);
173
		reg = arch_get_irn_register(irn);
174
	} else if (is_ia32_irn(irn)) {
175
		reg = arch_irn_get_register(irn, pos);
176
	} else {
Christian Würdig's avatar
Christian Würdig committed
177
178
179
180
181
182
		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) {
183
				reg = arch_get_irn_register(proj);
Christian Würdig's avatar
Christian Würdig committed
184
185
186
187
188
189
				break;
			}
		}
	}

	assert(reg && "no out register found");
Christian Würdig's avatar
Christian Würdig committed
190
191
192
	return reg;
}

Michael Beck's avatar
Michael Beck committed
193
/**
194
 * Add a number to a prefix. This number will not be used a second time.
Michael Beck's avatar
Michael Beck committed
195
 */
196
197
static char *get_unique_label(char *buf, size_t buflen, const char *prefix)
{
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
}

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

Michael Beck's avatar
Michael Beck committed
214
215
216
/**
 * Emit the name of the 8bit low register
 */
217
218
static void emit_8bit_register(const arch_register_t *reg)
{
219
	const char *reg_name = arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
220

221
222
223
224
225
	be_emit_char('%');
	be_emit_char(reg_name[1]);
	be_emit_char('l');
}

Michael Beck's avatar
Michael Beck committed
226
227
228
229
230
231
232
233
234
235
236
237
/**
 * 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');
}

238
239
240
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
241

242
243
	be_emit_char('%');
	be_emit_string(reg_name);
244
245
}

246
247
248
249
250
251
/**
 * emit a register, possible shortened by a mode
 *
 * @param reg   the register
 * @param mode  the mode of the register or NULL for full register
 */
252
253
254
255
static void emit_register(const arch_register_t *reg, const ir_mode *mode)
{
	const char *reg_name;

Christoph Mallon's avatar
Christoph Mallon committed
256
	if (mode != NULL) {
257
		int size = get_mode_size_bits(mode);
Christoph Mallon's avatar
Christoph Mallon committed
258
259
260
		switch (size) {
			case  8: emit_8bit_register(reg);  return;
			case 16: emit_16bit_register(reg); return;
261
		}
Christoph Mallon's avatar
Christoph Mallon committed
262
		assert(mode_is_float(mode) || size == 32);
263
264
265
	}

	reg_name = arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
266

267
268
	be_emit_char('%');
	be_emit_string(reg_name);
Christian Würdig's avatar
Christian Würdig committed
269
270
}

271
void ia32_emit_source_register(const ir_node *node, int pos)
272
{
Christoph Mallon's avatar
Christoph Mallon committed
273
	const arch_register_t *reg = get_in_reg(node, pos);
274

275
	emit_register(reg, NULL);
276
277
}

278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
static void ia32_emit_entity(ir_entity *entity, int no_pic_adjust)
{
	ident *id;

	set_entity_backend_marked(entity, 1);
	id = get_entity_ld_ident(entity);
	be_emit_ident(id);

	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");
		}
	}

	if (!no_pic_adjust && do_pic) {
		/* TODO: only do this when necessary */
		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('-');
		ia32_emit_entity(attr->symconst, 0);
	}
	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);
}
324
325
326
327

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
328
	const ir_node         *in = get_irn_n(node, pos);
Christoph Mallon's avatar
Christoph Mallon committed
329
	if (is_ia32_Immediate(in)) {
330
331
332
333
334
335
336
337
		emit_ia32_Immediate(in);
		return;
	}

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

Michael Beck's avatar
Michael Beck committed
338
339
340
341
342
343
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);
}

344
345
346
347
348
349
350
351
352
353
354
355
356
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);
}

357
358
359
360
361
362
363
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);
}

364
365
366
367
368
369
370
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));
}

371
372
373
374
375
376
377
378
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
379
{
380
	const ia32_x87_attr_t *attr = get_ia32_x87_attr_const(node);
381

Matthias Braun's avatar
Matthias Braun committed
382
	assert(pos < 3);
383
384
	be_emit_char('%');
	be_emit_string(attr->x87[pos]->name);
385
}
Christian Würdig's avatar
Christian Würdig committed
386

Matthias Braun's avatar
Matthias Braun committed
387
static void ia32_emit_mode_suffix_mode(const ir_mode *mode)
388
{
389
390
391
392
393
	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
394
395
		/* gas docu says q is the suffix but gcc, objdump and icc use ll
		 * apparently */
Matthias Braun's avatar
Matthias Braun committed
396
397
		case 64: be_emit_cstring("ll"); return;
	}
398
	panic("Can't output mode_suffix for %+F", mode);
Christian Würdig's avatar
Christian Würdig committed
399
400
}

401
void ia32_emit_mode_suffix(const ir_node *node)
402
403
{
	ir_mode *mode = get_ia32_ls_mode(node);
Christoph Mallon's avatar
Christoph Mallon committed
404
	if (mode == NULL)
Matthias Braun's avatar
Matthias Braun committed
405
406
		mode = mode_Iu;

407
	ia32_emit_mode_suffix_mode(mode);
408
409
}

410
void ia32_emit_x87_mode_suffix(const ir_node *node)
411
{
412
413
	ir_mode *mode;

414
	/* we only need to emit the mode on address mode */
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
	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;
		}
437
	}
438
	panic("Can't output mode_suffix for %+F", mode);
439
440
}

441
static char get_xmm_mode_suffix(ir_mode *mode)
442
443
444
{
	assert(mode_is_float(mode));
	switch(get_mode_size_bits(mode)) {
Christoph Mallon's avatar
Christoph Mallon committed
445
446
447
	case 32: return 's';
	case 64: return 'd';
	default: panic("Invalid XMM mode");
448
449
450
	}
}

451
void ia32_emit_xmm_mode_suffix(const ir_node *node)
452
453
{
	ir_mode *mode = get_ia32_ls_mode(node);
454
	assert(mode != NULL);
455
456
	be_emit_char('s');
	be_emit_char(get_xmm_mode_suffix(mode));
457
458
}

459
void ia32_emit_xmm_mode_suffix_s(const ir_node *node)
460
461
462
{
	ir_mode *mode = get_ia32_ls_mode(node);
	assert(mode != NULL);
463
	be_emit_char(get_xmm_mode_suffix(mode));
464
465
}

466
void ia32_emit_extend_suffix(const ir_node *node)
467
{
468
	ir_mode *mode = get_ia32_ls_mode(node);
Christoph Mallon's avatar
Christoph Mallon committed
469
	if (get_mode_size_bits(mode) == 32)
470
		return;
Christoph Mallon's avatar
Christoph Mallon committed
471
	be_emit_char(mode_is_signed(mode) ? 's' : 'z');
472
	ia32_emit_mode_suffix_mode(mode);
Matthias Braun's avatar
Matthias Braun committed
473
474
}

475
void ia32_emit_source_register_or_immediate(const ir_node *node, int pos)
476
477
{
	ir_node *in = get_irn_n(node, pos);
Christoph Mallon's avatar
Christoph Mallon committed
478
	if (is_ia32_Immediate(in)) {
479
		emit_ia32_Immediate(in);
480
	} else {
481
482
483
		const ir_mode         *mode = get_ia32_ls_mode(node);
		const arch_register_t *reg  = get_in_reg(node, pos);
		emit_register(reg, mode);
484
485
486
	}
}

Christian Würdig's avatar
Christian Würdig committed
487
/**
488
 * Returns the target block for a control flow node.
Christian Würdig's avatar
Christian Würdig committed
489
 */
490
static ir_node *get_cfop_target_block(const ir_node *irn)
Christoph Mallon's avatar
Christoph Mallon committed
491
{
492
493
494
	assert(get_irn_mode(irn) == mode_X);
	return get_irn_link(irn);
}
Christian Würdig's avatar
Christian Würdig committed
495

496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
/**
 * Emits a block label for the given block.
 */
static void ia32_emit_block_name(const ir_node *block)
{
	if (has_Block_label(block)) {
		be_emit_string(be_gas_block_label_prefix());
		be_emit_irprintf("%lu", get_Block_label(block));
	} 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
 */
522
523
524
525
526
527
528
529
530
static const char *const cmp2condition_s[] = {
	NULL, /* always false */
	"e",  /* == */
	"l",  /* <  */
	"le", /* <= */
	"g",  /* >  */
	"ge", /* >= */
	"ne", /* != */
	NULL  /* always true */
531
532
533
534
535
};

/*
 * positive conditions for unsigned compares
 */
536
537
538
539
540
541
542
543
544
static const char *const cmp2condition_u[] = {
	NULL, /* always false */
	"e",  /* == */
	"b",  /* <  */
	"be", /* <= */
	"a",  /* >  */
	"ae", /* >= */
	"ne", /* != */
	NULL  /* always true */
545
546
547
548
549
550
};

static void ia32_emit_cmp_suffix(int pnc)
{
	const char *str;

551
552
553
554
	if (pnc == ia32_pn_Cmp_parity) {
		be_emit_char('p');
		return;
	}
555
556
	if (pnc & ia32_pn_Cmp_float || pnc & ia32_pn_Cmp_unsigned) {
		str = cmp2condition_u[pnc & 7];
557
	} else {
558
		str = cmp2condition_s[pnc & 7];
559
560
561
562
563
	}

	be_emit_string(str);
}

564
565
typedef enum ia32_emit_mod_t {
	EMIT_RESPECT_LS   = 1U << 0,
566
567
	EMIT_ALTERNATE_AM = 1U << 1,
	EMIT_LONG         = 1U << 2
568
569
} ia32_emit_mod_t;

570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
/**
 * 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
586
 * %d   signed int              signed int
587
588
589
 *
 * x starts at 0
 * # modifier for %ASx, %D and %S uses ls mode of node to alter register width
590
 * * modifier does not prefix immediates with $, but AM with *
591
 * l modifier for %lu and %ld
592
593
594
595
596
597
598
 */
static void ia32_emitf(const ir_node *node, const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);

	for (;;) {
599
600
		const char      *start = fmt;
		ia32_emit_mod_t  mod   = 0;
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616

		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
617
			break;
618
619

		++fmt;
620
621
622
623
624
		if (*fmt == '*') {
			mod |= EMIT_ALTERNATE_AM;
			++fmt;
		}

625
		if (*fmt == '#') {
626
			mod |= EMIT_RESPECT_LS;
627
			++fmt;
628
		}
629

630
631
632
633
634
		if (*fmt == 'l') {
			mod |= EMIT_LONG;
			++fmt;
		}

635
636
637
638
639
640
641
642
		switch (*fmt++) {
			case '%':
				be_emit_char('%');
				break;

			case 'A': {
				switch (*fmt++) {
					case 'M':
643
644
						if (mod & EMIT_ALTERNATE_AM)
							be_emit_char('*');
645
646
647
648
649
						ia32_emit_am(node);
						break;

					case 'R': {
						const arch_register_t *reg = va_arg(ap, const arch_register_t*);
650
651
						if (mod & EMIT_ALTERNATE_AM)
							be_emit_char('*');
652
653
654
655
656
657
658
659
660
661
						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) {
662
663
							if (mod & EMIT_ALTERNATE_AM)
								be_emit_char('*');
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
							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);
686
				emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
687
688
689
690
				break;
			}

			case 'I':
691
692
693
				if (!(mod & EMIT_ALTERNATE_AM))
					be_emit_char('$');
				emit_ia32_Immediate_no_prefix(node);
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
				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)) {
728
729
730
					if (!(mod & EMIT_ALTERNATE_AM))
						be_emit_char('$');
					emit_ia32_Immediate_no_prefix(in);
731
				} else {
Michael Beck's avatar
Michael Beck committed
732
733
					const arch_register_t *reg;

734
735
					if (mod & EMIT_ALTERNATE_AM)
						be_emit_char('*');
Michael Beck's avatar
Michael Beck committed
736
					reg = get_in_reg(node, pos);
737
					emit_register(reg, mod & EMIT_RESPECT_LS ? get_ia32_ls_mode(node) : NULL);
738
739
740
741
742
743
744
745
746
747
				}
				break;
			}

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

748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
			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);
				}
766
767
768
769
				break;

			default:
unknown:
770
				panic("unknown format conversion in ia32_emitf()");
771
		}
772
773
774
775
776
777
778
779
780
781
782
783
784
785
	}

	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
786
	}
787
788
}

789
790
791
/**
 * Emits registers and/or address mode of a binary operation.
 */
Christoph Mallon's avatar
Christoph Mallon committed
792
793
void ia32_emit_x87_binop(const ir_node *node)
{
794
	switch(get_ia32_op_type(node)) {
795
		case ia32_Normal:
796
			{
797
798
				const ia32_x87_attr_t *x87_attr = get_ia32_x87_attr_const(node);
				const arch_register_t *in1      = x87_attr->x87[0];
799
				const arch_register_t *in       = x87_attr->x87[1];
800
				const arch_register_t *out      = x87_attr->x87[2];
801

802
803
804
805
806
				if (out == NULL) {
					out = in1;
				} else if (out == in) {
					in = in1;
				}
807

808
809
810
811
				be_emit_char('%');
				be_emit_string(arch_register_get_name(in));
				be_emit_cstring(", %");
				be_emit_string(arch_register_get_name(out));
812
813
814
			}
			break;
		case ia32_AddrModeS:
815
			ia32_emit_am(node);
816
			break;
817
		case ia32_AddrModeD:
818
819
820
821
822
		default:
			assert(0 && "unsupported op type");
	}
}

Christian Würdig's avatar
Christian Würdig committed
823
824
825
/**
 * Emits registers and/or address mode of a unary operation.
 */
Christoph Mallon's avatar
Christoph Mallon committed
826
827
void ia32_emit_unop(const ir_node *node, int pos)
{
828
829
830
	char fmt[] = "%ASx";
	fmt[3] = '0' + pos;
	ia32_emitf(node, fmt);
Christian Würdig's avatar
Christian Würdig committed
831
832
833
}

/**
834
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
835
 */
Christoph Mallon's avatar
Christoph Mallon committed
836
837
void ia32_emit_am(const ir_node *node)
{
838
839
	ir_entity *ent       = get_ia32_am_sc(node);
	int        offs      = get_ia32_am_offs_int(node);
Christoph Mallon's avatar
Christoph Mallon committed
840
	ir_node   *base      = get_irn_n(node, n_ia32_base);
841
	int        has_base  = !is_ia32_NoReg_GP(base);
Christoph Mallon's avatar
Christoph Mallon committed
842
	ir_node   *index     = get_irn_n(node, n_ia32_index);
843
	int        has_index = !is_ia32_NoReg_GP(index);
Christian Würdig's avatar
Christian Würdig committed
844

845
	/* just to be sure... */
846
	assert(!is_ia32_use_frame(node) || get_ia32_frame_ent(node) != NULL);
Christian Würdig's avatar
Christian Würdig committed
847

848
	/* emit offset */
849
	if (ent != NULL) {
850
		if (is_ia32_am_sc_sign(node))
851
			be_emit_char('-');
852
		ia32_emit_entity(ent, 0);
Christian Würdig's avatar
Christian Würdig committed
853
854
	}

Christoph Mallon's avatar
Christoph Mallon committed
855
856
857
	/* also handle special case if nothing is set */
	if (offs != 0 || (ent == NULL && !has_base && !has_index)) {
		if (ent != NULL) {
858
			be_emit_irprintf("%+d", offs);
859
		} else {
860
			be_emit_irprintf("%d", offs);
861
		}
862
	}
Christian Würdig's avatar
Christian Würdig committed
863

864
	if (has_base || has_index) {
865
		be_emit_char('(');
Christian Würdig's avatar
Christian Würdig committed
866

867
		/* emit base */
868
		if (has_base) {
869
870
			const arch_register_t *reg = get_in_reg(node, n_ia32_base);
			emit_register(reg, NULL);
Christian Würdig's avatar
Christian Würdig committed
871
872
		}

873
		/* emit index + scale */
874
		if (has_index) {
875
			const arch_register_t *reg = get_in_reg(node, n_ia32_index);
876
			int scale;
877
878
			be_emit_char(',');
			emit_register(reg, NULL);
879

880
881
			scale = get_ia32_am_scale(node);
			if (scale > 0) {
Christoph Mallon's avatar
Christoph Mallon committed
882
				be_emit_irprintf(",%d", 1 << scale);
883
884
			}
		}
885
		be_emit_char(')');
Christian Würdig's avatar
Christian Würdig committed
886
	}
887
}
Christian Würdig's avatar
Christian Würdig committed
888

Matthias Braun's avatar
Matthias Braun committed
889
890
891
892
893
894
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
895
	if (is_ia32_NoReg_GP(left) ||
Matthias Braun's avatar
Matthias Braun committed
896
			get_in_reg(node, n_ia32_IMul_left) != out_reg) {
897
898
899
		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
900
901
902
	}
}

903
904
905
/**
 * walks up a tree of copies/perms/spills/reloads to find the original value
 * that is moved around
906
 */
907
908
static ir_node *find_original_value(ir_node *node)
{
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
	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));
925
926
927
		} else {
			return node;
		}
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
	} 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;
943
944
945
946
947
	}
}

static int determine_final_pnc(const ir_node *node, int flags_pos,
                               int pnc)
948
{
949
950
951
952
	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
953
	if (is_ia32_Sahf(flags)) {
954
		ir_node *cmp = get_irn_n(flags, n_ia32_Sahf_val);
Christoph Mallon's avatar
Christoph Mallon committed
955
		if (!(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
956
				|| is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp))) {
957
			inc_irg_visited(current_ir_graph);
958
			cmp = find_original_value(cmp);
959
			assert(cmp != NULL);
960
			assert(is_ia32_FucomFnstsw(cmp) || is_ia32_FucompFnstsw(cmp)
961
			       || is_ia32_FucomppFnstsw(cmp) || is_ia32_FtstFnstsw(cmp));
962
		}
963

964
		flags_attr = get_ia32_attr_const(cmp);
Christoph Mallon's avatar
Christoph Mallon committed
965
		if (flags_attr->data.ins_permuted)
966
967
			pnc = get_mirrored_pnc(pnc);
		pnc |= ia32_pn_Cmp_float;
Christoph Mallon's avatar
Christoph Mallon committed
968
	} else if (is_ia32_Ucomi(flags) || is_ia32_Fucomi(flags)
Matthias Braun's avatar
Matthias Braun committed
969
			|| is_ia32_Fucompi(flags)) {
970
971
		flags_attr = get_ia32_attr_const(flags);

Christoph Mallon's avatar
Christoph Mallon committed
972
		if (flags_attr->data.ins_permuted)
973
974
			pnc = get_mirrored_pnc(pnc);
		pnc |= ia32_pn_Cmp_float;
975
	} else {
976
977
		flags_attr = get_ia32_attr_const(flags);

Christoph Mallon's avatar
Christoph Mallon committed
978
		if (flags_attr->data.ins_permuted)
979
			pnc = get_mirrored_pnc(pnc);
Christoph Mallon's avatar
Christoph Mallon committed
980
		if (flags_attr->data.cmp_unsigned)
981
			pnc |= ia32_pn_Cmp_unsigned;
982
	}
983
984

	return pnc;
985
986
}

987
988
989
990
991
992
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);
}

993
void ia32_emit_cmp_suffix_node(const ir_node *node,
994
995
                               int flags_pos)
{
996
997
	const ia32_attr_t *attr = get_ia32_attr_const(node);

Michael Beck's avatar
Michael Beck committed
998
	pn_Cmp pnc = get_ia32_condcode(node);
999
1000

	pnc = determine_final_pnc(node, flags_pos, pnc);
1001
1002
	if (attr->data.ins_permuted)
		pnc = ia32_get_negated_pnc(pnc);
1003

1004
	ia32_emit_cmp_suffix(pnc);
1005
}
1006

1007
1008
1009
1010
1011
1012
/**
 * 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());
1013
	be_emit_irprintf("%lu", get_ia32_exc_label_id(node));
1014
1015
}

1016
1017
1018
/**
 * Returns the Proj with projection number proj and NOT mode_M
 */
Christoph Mallon's avatar
Christoph Mallon committed
1019
1020
static ir_node *get_proj(const ir_node *node, long proj)
{
1021
1022
1023
	const ir_edge_t *edge;
	ir_node         *src;

1024
	assert(get_irn_mode(node) == mode_T && "expected mode_T node");
1025

1026
	foreach_out_edge(node, edge) {
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
		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;
}

1039
static int can_be_fallthrough(const ir_node *node)
1040
1041
1042
1043
1044
1045
{
	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
1046
1047
1048
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
1049
static void emit_ia32_Jcc(const ir_node *node)
1050
{
1051
	int            need_parity_label = 0;
1052
1053
1054
	const ir_node *proj_true;
	const ir_node *proj_false;
	const ir_node *block;
Michael Beck's avatar
Michael Beck committed
1055
	pn_Cmp         pnc = get_ia32_condcode(node);
Christian Würdig's avatar
Christian Würdig committed
1056

1057
	pnc = determine_final_pnc(node, 0, pnc);
Christian Würdig's avatar
Christian Würdig committed
1058

1059
1060
1061
	/* get both Projs */
	proj_true = get_proj(node, pn_ia32_Jcc_true);
	assert(proj_true && "Jcc without true Proj");
1062

1063
1064
	proj_false = get_proj(node, pn_ia32_Jcc_false);
	assert(proj_false && "Jcc without false Proj");
1065

1066
	block      = get_nodes_block(node);
1067

1068
	if (can_be_fallthrough(proj_true)) {
1069
		/* exchange both proj's so the second one can be omitted */
1070
1071
		const ir_node *t = proj_true;

1072
1073
		proj_true  = proj_false;
		proj_false = t;
1074
		pnc        = ia32_get_negated_pnc(pnc);
1075
1076
	}

1077
1078
1079
1080
	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) {
1081
			case pn_Cmp_Uo: {
1082
				ia32_emitf(