sparc_emitter.c 24.3 KB
Newer Older
Hannes Rapp's avatar
Hannes Rapp committed
1
/*
2
 * Copyright (C) 1995-2010 University of Karlsruhe.  All right reserved.
Hannes Rapp's avatar
Hannes Rapp committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 *
 * 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.
 */

/**
 * @file
 * @brief   emit assembler for a backend graph
Michael Beck's avatar
Michael Beck committed
23
 * @version $Id$
Hannes Rapp's avatar
Hannes Rapp committed
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
 */
#include "config.h"

#include <limits.h>

#include "xmalloc.h"
#include "tv.h"
#include "iredges.h"
#include "debug.h"
#include "irgwalk.h"
#include "irprintf.h"
#include "irop_t.h"
#include "irargs_t.h"
#include "irprog.h"
#include "irargs_t.h"
#include "error.h"
#include "raw_bitset.h"
#include "dbginfo.h"

#include "../besched.h"
#include "../beblocksched.h"
#include "../beirg.h"
#include "../begnuas.h"
#include "../be_dbgout.h"
#include "../benode.h"

#include "sparc_emitter.h"
#include "gen_sparc_emitter.h"
#include "sparc_nodes_attr.h"
#include "sparc_new_nodes.h"
Hannes Rapp's avatar
Hannes Rapp committed
54
55
#include "gen_sparc_regalloc_if.h"

Hannes Rapp's avatar
Hannes Rapp committed
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)

/**
 * Returns the register at in position pos.
 */
static const arch_register_t *get_in_reg(const ir_node *node, int pos)
{
	ir_node                *op;
	const arch_register_t  *reg = NULL;

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

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

	reg = arch_get_irn_register(op);

	assert(reg && "no in register found");
	return reg;
}

/**
 * Returns the register at out position pos.
 */
static const arch_register_t *get_out_reg(const ir_node *node, int pos)
{
	ir_node                *proj;
	const arch_register_t  *reg = NULL;

	/* 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(node) != mode_T) {
		reg = arch_get_irn_register(node);
	} else if (is_sparc_irn(node)) {
		reg = arch_irn_get_register(node, pos);
	} else {
		const ir_edge_t *edge;

		foreach_out_edge(node, edge) {
			proj = get_edge_src_irn(edge);
			assert(is_Proj(proj) && "non-Proj from mode_T node");
			if (get_Proj_proj(proj) == pos) {
				reg = arch_get_irn_register(proj);
				break;
			}
		}
	}

	assert(reg && "no out register found");
	return reg;
}

112
113
114
115
116
static bool is_valid_immediate(int32_t value)
{
	return -4096 <= value && value < 4096;
}

Hannes Rapp's avatar
Hannes Rapp committed
117
118
void sparc_emit_immediate(const ir_node *node)
{
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
	const sparc_attr_t *attr   = get_sparc_attr_const(node);
	ir_entity          *entity = attr->immediate_value_entity;

	if (entity == NULL) {
		int32_t value = attr->immediate_value;
		assert(is_valid_immediate(value));
		be_emit_irprintf("%d", value);
	} else {
		be_emit_cstring("%lo(");
		be_gas_emit_entity(entity);
		if (attr->immediate_value != 0) {
			be_emit_irprintf("%+d", attr->immediate_value);
		}
		be_emit_char(')');
	}
134
135
136
137
}

void sparc_emit_high_immediate(const ir_node *node)
{
138
139
140
141
142
143
144
145
146
147
148
149
150
151
	const sparc_attr_t *attr   = get_sparc_attr_const(node);
	ir_entity          *entity = attr->immediate_value_entity;

	be_emit_cstring("%hi(");
	if (entity == NULL) {
		uint32_t value = (uint32_t) attr->immediate_value;
		be_emit_irprintf("0x%X", value);
	} else {
		be_gas_emit_entity(entity);
		if (attr->immediate_value != 0) {
			be_emit_irprintf("%+d", attr->immediate_value);
		}
	}
	be_emit_char(')');
Hannes Rapp's avatar
Hannes Rapp committed
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
}

void sparc_emit_source_register(const ir_node *node, int pos)
{
	const arch_register_t *reg = get_in_reg(node, pos);
	be_emit_char('%');
	be_emit_string(arch_register_get_name(reg));
}

void sparc_emit_dest_register(const ir_node *node, int pos)
{
	const arch_register_t *reg = get_out_reg(node, pos);
	be_emit_char('%');
	be_emit_string(arch_register_get_name(reg));
}

/**
 * Emits either a imm or register depending on arity of node
 * @param node
 * @param register no (-1 if no register)
 */
void sparc_emit_reg_or_imm(const ir_node *node, int pos)
{
	if (get_irn_arity(node) > pos) {
		// we have reg input
		sparc_emit_source_register(node, pos);
	} else {
		// we have a imm input
		sparc_emit_immediate(node);
	}
}

184
185
186
187
188
189
190
static bool is_stack_pointer_relative(const ir_node *node)
{
	const arch_register_t *sp = &sparc_gp_regs[REG_SP];
	return (is_sparc_St(node) && get_in_reg(node, n_sparc_St_ptr) == sp)
	    || (is_sparc_Ld(node) && get_in_reg(node, n_sparc_Ld_ptr) == sp);
}

191
192
193
/**
 * emit SP offset
 */
Hannes Rapp's avatar
Hannes Rapp committed
194
195
void sparc_emit_offset(const ir_node *node)
{
196
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
197
198
199
200
201
202
203
204
205
206
207
208
209
210

	if (attr->is_frame_entity) {
		int32_t offset = attr->base.immediate_value;
		/* bad hack: the real stack stuff is behind the always-there spill
		 * space for the register window and stack */
		if (is_stack_pointer_relative(node))
			offset += SPARC_MIN_STACKSIZE;
		if (offset != 0) {
			assert(is_valid_immediate(offset));
			be_emit_irprintf("%+ld", offset);
		}
	} else {
		be_emit_char('+');
		sparc_emit_immediate(node);
211
	}
Hannes Rapp's avatar
Hannes Rapp committed
212
213
}

214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
void sparc_emit_float_load_store_mode(const ir_node *node)
{
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
	ir_mode *mode = attr->load_store_mode;
	int      bits = get_mode_size_bits(mode);

	assert(mode_is_float(mode));

	switch (bits) {
	case 32:  return;
	case 64:  be_emit_char('d'); return;
	case 128: be_emit_char('q'); return;
	}
	panic("invalid flaot load/store mode %+F", mode);
}
229

Hannes Rapp's avatar
Hannes Rapp committed
230
231
232
233
234
235
/**
 *  Emit load mode char
 */
void sparc_emit_load_mode(const ir_node *node)
{
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
236
237
238
239
240
241
242
243
244
	ir_mode *mode      = attr->load_store_mode;
	int      bits      = get_mode_size_bits(mode);
	bool     is_signed = mode_is_signed(mode);

	if (bits == 16) {
		be_emit_string(is_signed ? "sh" : "uh");
	} else if (bits == 8) {
		be_emit_string(is_signed ? "sb" : "ub");
	} else if (bits == 64) {
245
		be_emit_char('d');
246
247
248
	} else {
		assert(bits == 32);
	}
Hannes Rapp's avatar
Hannes Rapp committed
249
250
251
252
253
254
255
256
}

/**
 * Emit store mode char
 */
void sparc_emit_store_mode(const ir_node *node)
{
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
257
258
259
260
261
262
263
264
	ir_mode *mode      = attr->load_store_mode;
	int      bits      = get_mode_size_bits(mode);

	if (bits == 16) {
		be_emit_string("h");
	} else if (bits == 8) {
		be_emit_string("b");
	} else if (bits == 64) {
265
		be_emit_char('d');
266
267
268
	} else {
		assert(bits == 32);
	}
Hannes Rapp's avatar
Hannes Rapp committed
269
270
}

Hannes Rapp's avatar
Hannes Rapp committed
271
272
273
274
275
/**
 * emit integer signed/unsigned prefix char
 */
void sparc_emit_mode_sign_prefix(const ir_node *node)
{
276
277
278
	ir_mode *mode      = get_irn_mode(node);
	bool     is_signed = mode_is_signed(mode);
	be_emit_string(is_signed ? "s" : "u");
Hannes Rapp's avatar
Hannes Rapp committed
279
280
}

281
static void emit_fp_suffix(const ir_mode *mode)
Hannes Rapp's avatar
Hannes Rapp committed
282
{
283
	unsigned bits = get_mode_size_bits(mode);
284
	assert(mode_is_float(mode));
Hannes Rapp's avatar
Hannes Rapp committed
285

286
	if (bits == 32) {
287
		be_emit_char('s');
288
	} else if (bits == 64) {
289
290
291
		be_emit_char('d');
	} else if (bits == 128) {
		be_emit_char('q');
292
	} else {
293
		panic("invalid FP mode");
294
	}
Hannes Rapp's avatar
Hannes Rapp committed
295
296
}

297
void sparc_emit_fp_conv_source(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
298
{
299
300
301
	const sparc_fp_conv_attr_t *attr = get_sparc_fp_conv_attr_const(node);
	emit_fp_suffix(attr->src_mode);
}
Hannes Rapp's avatar
Hannes Rapp committed
302

303
304
305
306
void sparc_emit_fp_conv_destination(const ir_node *node)
{
	const sparc_fp_conv_attr_t *attr = get_sparc_fp_conv_attr_const(node);
	emit_fp_suffix(attr->dest_mode);
Hannes Rapp's avatar
Hannes Rapp committed
307
308
309
310
311
312
313
}

/**
 * emits the FP mode suffix char
 */
void sparc_emit_fp_mode_suffix(const ir_node *node)
{
314
315
	const sparc_fp_attr_t *attr = get_sparc_fp_attr_const(node);
	emit_fp_suffix(attr->fp_mode);
Hannes Rapp's avatar
Hannes Rapp committed
316
317
}

Hannes Rapp's avatar
Hannes Rapp committed
318
319
320
321
322
323
/**
 * Returns the target label for a control flow node.
 */
static void sparc_emit_cfop_target(const ir_node *node)
{
	ir_node *block = get_irn_link(node);
324
	be_gas_emit_block_name(block);
Hannes Rapp's avatar
Hannes Rapp committed
325
326
327
328
329
330
331
}

/**
 * Emit single entity
 */
static void sparc_emit_entity(ir_entity *entity)
{
332
	be_gas_emit_entity(entity);
Hannes Rapp's avatar
Hannes Rapp committed
333
334
335
336
337
338
339
340
341
}

/**
 * Emits code for stack space management
 */
static void emit_be_IncSP(const ir_node *irn)
{
	int offs = -be_get_IncSP_offset(irn);

342
343
	if (offs == 0)
			return;
Hannes Rapp's avatar
Hannes Rapp committed
344

345
346
347
348
	/* SPARC stack grows downwards */
	if (offs < 0) {
		be_emit_cstring("\tsub ");
		offs = -offs;
Hannes Rapp's avatar
Hannes Rapp committed
349
	} else {
350
		be_emit_cstring("\tadd ");
Hannes Rapp's avatar
Hannes Rapp committed
351
352
	}

353
354
355
356
357
358
	sparc_emit_source_register(irn, 0);
	be_emit_irprintf(", %d", offs);
	be_emit_cstring(", ");
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}
359

360
/**
Hannes Rapp's avatar
Hannes Rapp committed
361
 * emits code for save instruction with min. required stack space
362
363
364
 */
static void emit_sparc_Save(const ir_node *irn)
{
365
	const sparc_save_attr_t *save_attr = get_sparc_save_attr_const(irn);
366
367
368
369
370
	be_emit_cstring("\tsave ");
	sparc_emit_source_register(irn, 0);
	be_emit_irprintf(", %d, ", -save_attr->initial_stacksize);
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
Hannes Rapp's avatar
Hannes Rapp committed
371
372
}

Hannes Rapp's avatar
Hannes Rapp committed
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
/**
 * emits code for mulh
 */
static void emit_sparc_Mulh(const ir_node *irn)
{
	be_emit_cstring("\t");
	sparc_emit_mode_sign_prefix(irn);
	be_emit_cstring("mul ");

	sparc_emit_source_register(irn, 0);
	be_emit_cstring(", ");
	sparc_emit_reg_or_imm(irn, 1);
	be_emit_cstring(", ");
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);

	// our result is in the y register now
	// we just copy it to the assigned target reg
391
	be_emit_cstring("\tmov %y, ");
Hannes Rapp's avatar
Hannes Rapp committed
392
393
394
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}
395

396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
static void emit_sparc_Div(const ir_node *node, bool is_signed)
{
	/* can we get the delay count of the wr instruction somewhere? */
	unsigned wry_delay_count = 3;
	unsigned i;

	be_emit_cstring("\twr ");
	sparc_emit_source_register(node, 0);
	be_emit_cstring(", 0, %y");
	be_emit_finish_line_gas(node);

	for (i = 0; i < wry_delay_count; ++i) {
		be_emit_cstring("\tnop");
		be_emit_finish_line_gas(node);
	}

	be_emit_irprintf("\t%s ", is_signed ? "sdiv" : "udiv");
	sparc_emit_source_register(node, 1);
	be_emit_cstring(", ");
	sparc_emit_source_register(node, 2);
	be_emit_cstring(", ");
	sparc_emit_dest_register(node, 0);
	be_emit_finish_line_gas(node);
}

static void emit_sparc_SDiv(const ir_node *node)
{
	(void) node;
	/* aehm we would need an aditional register for an sra instruction to
	 * compute the upper bits... Just panic for now */
	//emit_sparc_Div(node, true);
	panic("signed div is wrong");
}

static void emit_sparc_UDiv(const ir_node *node)
{
	emit_sparc_Div(node, false);
}

Hannes Rapp's avatar
Hannes Rapp committed
435
436
437
438
439
440
/**
 * Emits code for return node
 */
static void emit_be_Return(const ir_node *irn)
{
	be_emit_cstring("\tret");
441
	//be_emit_cstring("\tjmp %i7+8");
Hannes Rapp's avatar
Hannes Rapp committed
442
	be_emit_finish_line_gas(irn);
443
444
	be_emit_cstring("\trestore");
	be_emit_finish_line_gas(irn);
Hannes Rapp's avatar
Hannes Rapp committed
445
446
447
448
449
}

/**
 * Emits code for Call node
 */
450
static void emit_sparc_Call(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
451
{
452
453
	const sparc_attr_t *attr   = get_sparc_attr_const(node);
	ir_entity          *entity = attr->immediate_value_entity;
Hannes Rapp's avatar
Hannes Rapp committed
454

455
	be_emit_cstring("\tcall ");
Hannes Rapp's avatar
Hannes Rapp committed
456
457
	if (entity != NULL) {
	    sparc_emit_entity(entity);
458
459
460
	    if (attr->immediate_value != 0) {
			be_emit_irprintf("%+d", attr->immediate_value);
		}
461
		be_emit_cstring(", 0");
Hannes Rapp's avatar
Hannes Rapp committed
462
	} else {
463
464
		int last = get_irn_arity(node);
		sparc_emit_source_register(node, last-1);
Hannes Rapp's avatar
Hannes Rapp committed
465
	}
466
467
468
469
470
	be_emit_finish_line_gas(node);

	/* fill delay slot */
	be_emit_cstring("\tnop");
	be_emit_finish_line_gas(node);
Hannes Rapp's avatar
Hannes Rapp committed
471
472
}

473
/**
Hannes Rapp's avatar
Hannes Rapp committed
474
 * Emit code for Perm node
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
 */
static void emit_be_Perm(const ir_node *irn)
{
	be_emit_cstring("\txor ");
	sparc_emit_source_register(irn, 1);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 0);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 0);
	be_emit_finish_line_gas(NULL);

	be_emit_cstring("\txor ");
	sparc_emit_source_register(irn, 1);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 0);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 1);
	be_emit_finish_line_gas(NULL);

	be_emit_cstring("\txor ");
	sparc_emit_source_register(irn, 1);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 0);
	be_emit_cstring(", ");
	sparc_emit_source_register(irn, 0);
	be_emit_finish_line_gas(irn);
}

Hannes Rapp's avatar
Hannes Rapp committed
503
504
505
506
507
508
509
510
/**
 * TODO: not really tested but seems to work with memperm_arity == 1
 */
static void emit_be_MemPerm(const ir_node *node)
{
	int i;
	int memperm_arity;
	int sp_change = 0;
511
512
513
514
515
	ir_graph          *irg    = get_irn_irg(node);
	be_stack_layout_t *layout = be_get_irg_stack_layout(irg);

	/* this implementation only works with frame pointers currently */
	assert(layout->sp_relative == false);
Hannes Rapp's avatar
Hannes Rapp committed
516
517
518
519
520
521
522
523
524

	/* TODO: this implementation is slower than necessary.
	   The longterm goal is however to avoid the memperm node completely */

	memperm_arity = be_get_MemPerm_entity_arity(node);
	// we use our local registers - so this is limited to 8 inputs !
	if (memperm_arity > 8)
		panic("memperm with more than 8 inputs not supported yet");

525
526
527
	be_emit_irprintf("\tsub %%sp, %d, %%sp", memperm_arity*4);
	be_emit_finish_line_gas(node);

Hannes Rapp's avatar
Hannes Rapp committed
528
529
	for (i = 0; i < memperm_arity; ++i) {
		ir_entity *entity = be_get_MemPerm_in_entity(node, i);
530
		int        offset = be_get_stack_entity_offset(layout, entity, 0);
Hannes Rapp's avatar
Hannes Rapp committed
531
532

		/* spill register */
533
		be_emit_irprintf("\tst %%l%d, [%%sp%+d]", i, sp_change + SPARC_MIN_STACKSIZE);
Hannes Rapp's avatar
Hannes Rapp committed
534
535
536
		be_emit_finish_line_gas(node);

		/* load from entity */
537
		be_emit_irprintf("\tld [%%fp%+d], %%l%d", offset, i);
Hannes Rapp's avatar
Hannes Rapp committed
538
		be_emit_finish_line_gas(node);
539
		sp_change += 4;
Hannes Rapp's avatar
Hannes Rapp committed
540
541
542
543
	}

	for (i = memperm_arity-1; i >= 0; --i) {
		ir_entity *entity = be_get_MemPerm_out_entity(node, i);
544
545
546
		int        offset = be_get_stack_entity_offset(layout, entity, 0);

		sp_change -= 4;
Hannes Rapp's avatar
Hannes Rapp committed
547
548

		/* store to new entity */
549
		be_emit_irprintf("\tst %%l%d, [%%fp%+d]", i, offset);
Hannes Rapp's avatar
Hannes Rapp committed
550
551
		be_emit_finish_line_gas(node);
		/* restore register */
552
		be_emit_irprintf("\tld [%%sp%+d], %%l%d", sp_change + SPARC_MIN_STACKSIZE, i);
Hannes Rapp's avatar
Hannes Rapp committed
553
554
		be_emit_finish_line_gas(node);
	}
555
556
557
558

	be_emit_irprintf("\tadd %%sp, %d, %%sp", memperm_arity*4);
	be_emit_finish_line_gas(node);

Hannes Rapp's avatar
Hannes Rapp committed
559
560
561
	assert(sp_change == 0);
}

Hannes Rapp's avatar
Hannes Rapp committed
562
563
564
/**
 * Emits code for FrameAddr fix
 */
565
static void emit_sparc_FrameAddr(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
566
{
567
	const sparc_attr_t *attr = get_sparc_attr_const(node);
568
569

	// no need to fix offset as we are adressing via the framepointer
570
	if (attr->immediate_value >= 0) {
571
		be_emit_cstring("\tadd ");
572
		sparc_emit_source_register(node, 0);
573
		be_emit_cstring(", ");
574
		be_emit_irprintf("%ld", attr->immediate_value);
575
576
	} else {
		be_emit_cstring("\tsub ");
577
		sparc_emit_source_register(node, 0);
578
		be_emit_cstring(", ");
579
		be_emit_irprintf("%ld", -attr->immediate_value);
580
581
	}

Hannes Rapp's avatar
Hannes Rapp committed
582
	be_emit_cstring(", ");
583
584
	sparc_emit_dest_register(node, 0);
	be_emit_finish_line_gas(node);
Hannes Rapp's avatar
Hannes Rapp committed
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
629
630
631
632
633
634
635
636
637
638
639
640
641
642
static const char *get_icc_unsigned(pn_Cmp pnc)
{
	switch (pnc) {
	case pn_Cmp_False: return "bn";
	case pn_Cmp_Eq:    return "be";
	case pn_Cmp_Lt:    return "blu";
	case pn_Cmp_Le:    return "bleu";
	case pn_Cmp_Gt:    return "bgu";
	case pn_Cmp_Ge:    return "bgeu";
	case pn_Cmp_Lg:    return "bne";
	case pn_Cmp_Leg:   return "ba";
	default: panic("Cmp has unsupported pnc");
	}
}

static const char *get_icc_signed(pn_Cmp pnc)
{
	switch (pnc) {
	case pn_Cmp_False: return "bn";
	case pn_Cmp_Eq:    return "be";
	case pn_Cmp_Lt:    return "bl";
	case pn_Cmp_Le:    return "ble";
	case pn_Cmp_Gt:    return "bg";
	case pn_Cmp_Ge:    return "bge";
	case pn_Cmp_Lg:    return "bne";
	case pn_Cmp_Leg:   return "ba";
	default: panic("Cmp has unsupported pnc");
	}
}

static const char *get_fcc(pn_Cmp pnc)
{
	switch (pnc) {
	case pn_Cmp_False: return "fbn";
	case pn_Cmp_Eq:    return "fbe";
	case pn_Cmp_Lt:    return "fbl";
	case pn_Cmp_Le:    return "fble";
	case pn_Cmp_Gt:    return "fbg";
	case pn_Cmp_Ge:    return "fbge";
	case pn_Cmp_Lg:    return "fblg";
	case pn_Cmp_Leg:   return "fbo";
	case pn_Cmp_Uo:    return "fbu";
	case pn_Cmp_Ue:    return "fbue";
	case pn_Cmp_Ul:    return "fbul";
	case pn_Cmp_Ule:   return "fbule";
	case pn_Cmp_Ug:    return "fbug";
	case pn_Cmp_Uge:   return "fbuge";
	case pn_Cmp_Ne:    return "fbne";
	case pn_Cmp_True:  return "fba";
	case pn_Cmp_max:
		break;
	}
	panic("invalid pnc");
}

typedef const char* (*get_cc_func)(pn_Cmp pnc);
Hannes Rapp's avatar
Hannes Rapp committed
643
644
645
646

/**
 * Emits code for Branch
 */
647
static void emit_sparc_branch(const ir_node *node, get_cc_func get_cc)
Hannes Rapp's avatar
Hannes Rapp committed
648
{
649
	const sparc_jmp_cond_attr_t *attr = get_sparc_jmp_cond_attr_const(node);
650
	pn_Cmp           pnc         = attr->pnc;
651
652
	const ir_node   *proj_true   = NULL;
	const ir_node   *proj_false  = NULL;
653
	const ir_edge_t *edge;
654
655
656
657
	const ir_node   *block;
	const ir_node   *next_block;

	foreach_out_edge(node, edge) {
658
659
660
661
662
663
664
665
666
667
		ir_node *proj = get_edge_src_irn(edge);
		long nr = get_Proj_proj(proj);
		if (nr == pn_Cond_true) {
			proj_true = proj;
		} else {
			proj_false = proj;
		}
	}

	/* for now, the code works for scheduled and non-schedules blocks */
668
	block = get_nodes_block(node);
669
670
671
672
673
674
675
676
677
678

	/* we have a block schedule */
	next_block = get_irn_link(block);

	if (get_irn_link(proj_true) == next_block) {
		/* exchange both proj's so the second one can be omitted */
		const ir_node *t = proj_true;

		proj_true  = proj_false;
		proj_false = t;
679
680
681
682
		if (is_sparc_fbfcc(node)) {
			pnc = get_negated_pnc(pnc, mode_F);
		} else {
			pnc = get_negated_pnc(pnc, mode_Iu);
683
		}
684
685
686
	}

	/* emit the true proj */
687
688
	be_emit_cstring("\t");
	be_emit_string(get_cc(pnc));
689
	be_emit_char(' ');
690
691
692
693
694
695
696
697
	sparc_emit_cfop_target(proj_true);
	be_emit_finish_line_gas(proj_true);

	be_emit_cstring("\tnop");
	be_emit_pad_comment();
	be_emit_cstring("/* TODO: use delay slot */\n");

	if (get_irn_link(proj_false) == next_block) {
698
		be_emit_cstring("\t/* fallthrough to ");
699
700
701
702
703
704
705
		sparc_emit_cfop_target(proj_false);
		be_emit_cstring(" */");
		be_emit_finish_line_gas(proj_false);
	} else {
		be_emit_cstring("\tba ");
		sparc_emit_cfop_target(proj_false);
		be_emit_finish_line_gas(proj_false);
706
707
		be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
		be_emit_finish_line_gas(proj_false);
708
	}
Hannes Rapp's avatar
Hannes Rapp committed
709
710
}

711
712
713
714
715
716
717
718
719
720
721
722
static void emit_sparc_Bicc(const ir_node *node)
{
	const sparc_jmp_cond_attr_t *attr = get_sparc_jmp_cond_attr_const(node);
	bool             is_unsigned = attr->is_unsigned;
	emit_sparc_branch(node, is_unsigned ? get_icc_unsigned : get_icc_signed);
}

static void emit_sparc_fbfcc(const ir_node *node)
{
	emit_sparc_branch(node, get_fcc);
}

723
/**
724
 * emit Jmp (which actually is a branch always (ba) instruction)
725
 */
726
static void emit_sparc_Ba(const ir_node *node)
727
728
729
730
731
732
733
734
735
736
737
{
	ir_node *block, *next_block;

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(node);

	/* we have a block schedule */
	next_block = get_irn_link(block);
	if (get_irn_link(node) != next_block) {
		be_emit_cstring("\tba ");
		sparc_emit_cfop_target(node);
738
739
		be_emit_finish_line_gas(node);
		be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
740
741
742
743
744
745
746
747
	} else {
		be_emit_cstring("\t/* fallthrough to ");
		sparc_emit_cfop_target(node);
		be_emit_cstring(" */");
	}
	be_emit_finish_line_gas(node);
}

748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
static void emit_fmov(const ir_node *node, const arch_register_t *src_reg,
                      const arch_register_t *dst_reg)
{
	be_emit_cstring("\tfmov ");
	be_emit_string(arch_register_get_name(src_reg));
	be_emit_cstring(", ");
	be_emit_string(arch_register_get_name(dst_reg));
	be_emit_finish_line_gas(node);
}

static const arch_register_t *get_next_fp_reg(const arch_register_t *reg)
{
	unsigned index = reg->index;
	assert(reg == &sparc_fp_regs[index]);
	index++;
	assert(index < N_sparc_fp_REGS);
	return &sparc_fp_regs[index];
}

767
768
769
/**
 * emit copy node
 */
770
static void emit_be_Copy(const ir_node *node)
771
{
772
773
774
	ir_mode               *mode    = get_irn_mode(node);
	const arch_register_t *src_reg = get_in_reg(node, 0);
	const arch_register_t *dst_reg = get_out_reg(node, 0);
775

776
	if (src_reg == dst_reg)
777
778
779
		return;

	if (mode_is_float(mode)) {
780
781
782
783
784
785
786
787
788
		unsigned bits = get_mode_size_bits(mode);
		int      n    = bits > 32 ? bits > 64 ? 3 : 1 : 0;
		int      i;
		emit_fmov(node, src_reg, dst_reg);
		for (i = 0; i < n; ++i) {
			src_reg = get_next_fp_reg(src_reg);
			dst_reg = get_next_fp_reg(dst_reg);
			emit_fmov(node, src_reg, dst_reg);
		}
789
790
	} else if (mode_is_data(mode)) {
		be_emit_cstring("\tmov ");
791
		sparc_emit_source_register(node, 0);
792
		be_emit_cstring(", ");
793
794
		sparc_emit_dest_register(node, 0);
		be_emit_finish_line_gas(node);
795
	} else {
796
		panic("emit_be_Copy: invalid mode");
797
798
799
800
	}
}


Hannes Rapp's avatar
Hannes Rapp committed
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
829
830
831
832
833
/**
 * dummy emitter for ignored nodes
 */
static void emit_nothing(const ir_node *irn)
{
	(void) irn;
}

/**
 * type of emitter function
 */
typedef void (*emit_func) (const ir_node *);

/**
 * Set a node emitter. Make it a bit more type safe.
 */
static inline void set_emitter(ir_op *op, emit_func sparc_emit_node)
{
	op->ops.generic = (op_func)sparc_emit_node;
}

/**
 * Enters the emitter functions for handled nodes into the generic
 * pointer of an opcode.
 */
static void sparc_register_emitters(void)
{
	/* first clear the generic function pointer for all ops */
	clear_irp_opcodes_generic_func();
	/* register all emitter functions defined in spec */
	sparc_register_spec_emitters();

	/* custom emitter */
834
835
836
837
838
839
	set_emitter(op_be_Copy,         emit_be_Copy);
	set_emitter(op_be_CopyKeep,     emit_be_Copy);
	set_emitter(op_be_IncSP,        emit_be_IncSP);
	set_emitter(op_be_MemPerm,      emit_be_MemPerm);
	set_emitter(op_be_Perm,         emit_be_Perm);
	set_emitter(op_be_Return,       emit_be_Return);
840
	set_emitter(op_sparc_Ba,        emit_sparc_Ba);
841
	set_emitter(op_sparc_Bicc,      emit_sparc_Bicc);
842
	set_emitter(op_sparc_Call,      emit_sparc_Call);
843
	set_emitter(op_sparc_fbfcc,     emit_sparc_fbfcc);
844
845
846
	set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
	set_emitter(op_sparc_Mulh,      emit_sparc_Mulh);
	set_emitter(op_sparc_Save,      emit_sparc_Save);
847
848
	set_emitter(op_sparc_SDiv,      emit_sparc_SDiv);
	set_emitter(op_sparc_UDiv,      emit_sparc_UDiv);
849
850
851
852
853
854

	/* no need to emit anything for the following nodes */
	set_emitter(op_be_Barrier, emit_nothing);
	set_emitter(op_be_Keep,    emit_nothing);
	set_emitter(op_be_Start,   emit_nothing);
	set_emitter(op_Phi,        emit_nothing);
Hannes Rapp's avatar
Hannes Rapp committed
855
856
857
858
859
}

/**
 * Emits code for a node.
 */
860
static void sparc_emit_node(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
861
{
862
	ir_op *op = get_irn_op(node);
Hannes Rapp's avatar
Hannes Rapp committed
863
864
865
866
867
868

	if (op->ops.generic) {
		emit_func func = (emit_func) op->ops.generic;
		be_dbg_set_dbg_info(get_irn_dbg_info(node));
		(*func) (node);
	} else {
869
870
		panic("No emit handler for node %+F (graph %+F)\n",	node,
		      current_ir_graph);
Hannes Rapp's avatar
Hannes Rapp committed
871
872
873
874
875
876
877
	}
}

/**
 * Walks over the nodes in a block connected by scheduling edges
 * and emits code for each node.
 */
878
static void sparc_gen_block(ir_node *block, void *data)
879
{
Hannes Rapp's avatar
Hannes Rapp committed
880
881
882
883
884
	ir_node *node;
	(void) data;

	if (! is_Block(block))
		return;
885
886
887

	be_gas_emit_block_name(block);
	be_emit_cstring(":\n");
Hannes Rapp's avatar
Hannes Rapp committed
888
	be_emit_write_line();
889

Hannes Rapp's avatar
Hannes Rapp committed
890
891
892
893
894
895
896
897
898
	sched_foreach(block, node) {
		sparc_emit_node(node);
	}
}


/**
 * Emits code for function start.
 */
899
static void sparc_emit_func_prolog(ir_graph *irg)
900
{
Hannes Rapp's avatar
Hannes Rapp committed
901
	ir_entity *ent = get_irg_entity(irg);
902
	be_gas_emit_function_prolog(ent, 4);
Hannes Rapp's avatar
Hannes Rapp committed
903
904
905
906
907
908
	be_emit_write_line();
}

/**
 * Emits code for function end
 */
909
static void sparc_emit_func_epilog(ir_graph *irg)
910
{
Hannes Rapp's avatar
Hannes Rapp committed
911
912
	ir_entity *ent = get_irg_entity(irg);
	const char *irg_name = get_entity_ld_name(ent);
913
	be_emit_write_line();
Hannes Rapp's avatar
Hannes Rapp committed
914
915
916
917
918
919
920
921
	be_emit_irprintf("\t.size  %s, .-%s\n", irg_name, irg_name);
	be_emit_cstring("# -- End ");
	be_emit_string(irg_name);
	be_emit_cstring("\n");
	be_emit_write_line();
}

/**
922
923
924
 * Block-walker:
 * TODO: Sets labels for control flow nodes (jump target).
 * Links control predecessors to there destination blocks.
Hannes Rapp's avatar
Hannes Rapp committed
925
 */
926
static void sparc_gen_labels(ir_node *block, void *env)
927
{
Hannes Rapp's avatar
Hannes Rapp committed
928
929
930
931
932
933
	ir_node *pred;
	int n = get_Block_n_cfgpreds(block);
	(void) env;

	for (n--; n >= 0; n--) {
		pred = get_Block_cfgpred(block, n);
934
		set_irn_link(pred, block); // link the pred of a block (which is a jmp)
Hannes Rapp's avatar
Hannes Rapp committed
935
936
937
938
939
940
941
942
943
	}
}


/**
 * Main driver
 */
void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
{
944
945
	ir_node **blk_sched;
	ir_node *last_block = NULL;
Hannes Rapp's avatar
Hannes Rapp committed
946
	ir_entity *entity     = get_irg_entity(irg);
947
	int i, n;
948
	(void) cg;
Hannes Rapp's avatar
Hannes Rapp committed
949

950
	be_gas_elf_type_char = '#';
951
	be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF_SPARC;
952

Hannes Rapp's avatar
Hannes Rapp committed
953
954
	/* register all emitter functions */
	sparc_register_emitters();
955
	be_dbg_method_begin(entity);
956
957

	/* create the block schedule. For now, we don't need it earlier. */
958
	blk_sched = be_create_block_schedule(irg);
959
960

	// emit function prolog
Hannes Rapp's avatar
Hannes Rapp committed
961
	sparc_emit_func_prolog(irg);
962
963

	// generate BLOCK labels
Hannes Rapp's avatar
Hannes Rapp committed
964
965
	irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);

966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
	// inject block scheduling links & emit code of each block
	n = ARR_LEN(blk_sched);
	for (i = 0; i < n;) {
		ir_node *block, *next_bl;

		block = blk_sched[i];
		++i;
		next_bl = i < n ? blk_sched[i] : NULL;

		/* set here the link. the emitter expects to find the next block here */
		set_irn_link(block, next_bl);
		sparc_gen_block(block, last_block);
		last_block = block;
	}

	// emit function epilog
	sparc_emit_func_epilog(irg);
Hannes Rapp's avatar
Hannes Rapp committed
983
984
985
986
987
988
}

void sparc_init_emitter(void)
{
	FIRM_DBG_REGISTER(dbg, "firm.be.sparc.emit");
}