sparc_emitter.c 22.3 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
112
113
114
115

#define SNPRINTF_BUF_LEN 128
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;
}

void sparc_emit_immediate(const ir_node *node)
{
116
117
118
	int const val = get_sparc_attr_const(node)->immediate_value;
	assert(-4096 <= val && val < 4096);
	be_emit_irprintf("%d", val);
Hannes Rapp's avatar
Hannes Rapp committed
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
}

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);
	}
}

151
152
153
154
155
156
157
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);
}

158
159
160
/**
 * emit SP offset
 */
Hannes Rapp's avatar
Hannes Rapp committed
161
162
void sparc_emit_offset(const ir_node *node)
{
163
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
164
165
166
167
168
169
170
171
	long                           offset = attr->offset;

	/* 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) {
		be_emit_irprintf("%+ld", offset);
172
	}
Hannes Rapp's avatar
Hannes Rapp committed
173
174
}

175

Hannes Rapp's avatar
Hannes Rapp committed
176
177
178
179
180
181
/**
 *  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);
182
183
184
185
186
187
188
189
190
191
192
193
194
	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) {
		be_emit_string("d");
	} else {
		assert(bits == 32);
	}
Hannes Rapp's avatar
Hannes Rapp committed
195
196
197
198
199
200
201
202
}

/**
 * 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);
203
204
205
206
207
208
209
210
211
212
213
214
	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) {
		be_emit_string("d");
	} else {
		assert(bits == 32);
	}
Hannes Rapp's avatar
Hannes Rapp committed
215
216
}

Hannes Rapp's avatar
Hannes Rapp committed
217
218
219
220
221
/**
 * emit integer signed/unsigned prefix char
 */
void sparc_emit_mode_sign_prefix(const ir_node *node)
{
222
223
224
	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
225
226
227
228
229
230
231
232
}

/**
 * emit FP load mode char
 */
void sparc_emit_fp_load_mode(const ir_node *node)
{
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
233
234
	ir_mode *mode      = attr->load_store_mode;
	int      bits      = get_mode_size_bits(mode);
Hannes Rapp's avatar
Hannes Rapp committed
235

236
	assert(mode_is_float(mode));
Hannes Rapp's avatar
Hannes Rapp committed
237

238
239
240
241
242
	if (bits == 32) {
		be_emit_string("f");
	} else if (bits == 64) {
		be_emit_string("df");
	} else {
243
		panic("FP load mode > 64bits not implemented yet");
244
	}
Hannes Rapp's avatar
Hannes Rapp committed
245
246
247
248
249
250
251
252
}

/**
 * emit FP store mode char
 */
void sparc_emit_fp_store_mode(const ir_node *node)
{
	const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
253
254
	ir_mode *mode      = attr->load_store_mode;
	int      bits      = get_mode_size_bits(mode);
Hannes Rapp's avatar
Hannes Rapp committed
255

256
	assert(mode_is_float(mode));
Hannes Rapp's avatar
Hannes Rapp committed
257

258
259
260
261
262
	if (bits == 32) {
		be_emit_string("f");
	} else if (bits == 64) {
		be_emit_string("df");
	} else {
263
		panic("FP store mode > 64bits not implemented yet");
264
	}
Hannes Rapp's avatar
Hannes Rapp committed
265
266
267
268
269
270
271
}

/**
 * emits the FP mode suffix char
 */
void sparc_emit_fp_mode_suffix(const ir_node *node)
{
272
273
	ir_mode *mode      = get_irn_mode(node);
	int      bits      = get_mode_size_bits(mode);
Hannes Rapp's avatar
Hannes Rapp committed
274

275
	assert(mode_is_float(mode));
Hannes Rapp's avatar
Hannes Rapp committed
276

277
	if (bits == 32) {
278
		be_emit_string("s");
279
	} else if (bits == 64) {
280
		be_emit_string("d");
281
	} else {
Hannes Rapp's avatar
Hannes Rapp committed
282
		panic("FP mode > 64bits not implemented yet");
283
	}
Hannes Rapp's avatar
Hannes Rapp committed
284
285
}

Hannes Rapp's avatar
Hannes Rapp committed
286
287
288
289
290
291
/**
 * 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);
292
	be_gas_emit_block_name(block);
Hannes Rapp's avatar
Hannes Rapp committed
293
294
295
296
297
298
299
}

/**
 * Emit single entity
 */
static void sparc_emit_entity(ir_entity *entity)
{
300
	be_gas_emit_entity(entity);
Hannes Rapp's avatar
Hannes Rapp committed
301
302
303
304
305
306
307
308
309
}

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

310
311
	if (offs == 0)
			return;
Hannes Rapp's avatar
Hannes Rapp committed
312

313
314
315
316
	/* SPARC stack grows downwards */
	if (offs < 0) {
		be_emit_cstring("\tsub ");
		offs = -offs;
Hannes Rapp's avatar
Hannes Rapp committed
317
	} else {
318
		be_emit_cstring("\tadd ");
Hannes Rapp's avatar
Hannes Rapp committed
319
320
	}

321
322
323
324
325
326
	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);
}
327

328
/**
Hannes Rapp's avatar
Hannes Rapp committed
329
 * emits code for save instruction with min. required stack space
330
331
332
 */
static void emit_sparc_Save(const ir_node *irn)
{
333
	const sparc_save_attr_t *save_attr = get_sparc_save_attr_const(irn);
334
335
336
337
338
	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
339
340
}

341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
/**
 * emits code to load hi 22 bit of a constant
 */
static void emit_sparc_HiImm(const ir_node *irn)
{
	const sparc_attr_t *attr = get_sparc_attr_const(irn);
	be_emit_cstring("\tsethi ");
	be_emit_irprintf("%%hi(%d), ", attr->immediate_value);
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}

/**
 * emits code to load lo 10bits of a constant
 */
static void emit_sparc_LoImm(const ir_node *irn)
{
	const sparc_attr_t *attr = get_sparc_attr_const(irn);
	be_emit_cstring("\tor ");
	sparc_emit_source_register(irn, 0);
	be_emit_irprintf(", %%lo(%d), ", attr->immediate_value);
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}

Hannes Rapp's avatar
Hannes Rapp committed
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
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
/**
 * emit code for div with the correct sign prefix
 */
static void emit_sparc_Div(const ir_node *irn)
{
	be_emit_cstring("\t");
	sparc_emit_mode_sign_prefix(irn);
	be_emit_cstring("div ");

	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);
}

/**
 * emit code for mul with the correct sign prefix
 */
static void emit_sparc_Mul(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);
}

/**
 * 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
	be_emit_cstring("\tmov ");
	be_emit_char('%');
	be_emit_string(arch_register_get_name(&sparc_flags_regs[REG_Y]));
	be_emit_cstring(", ");
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}
425

Hannes Rapp's avatar
Hannes Rapp committed
426
427
428
429
430
431
/**
 * Emits code for return node
 */
static void emit_be_Return(const ir_node *irn)
{
	be_emit_cstring("\tret");
432
	//be_emit_cstring("\tjmp %i7+8");
Hannes Rapp's avatar
Hannes Rapp committed
433
	be_emit_finish_line_gas(irn);
434
435
	be_emit_cstring("\trestore");
	be_emit_finish_line_gas(irn);
Hannes Rapp's avatar
Hannes Rapp committed
436
437
438
439
440
441
442
443
444
445
446
447
}

/**
 * Emits code for Call node
 */
static void emit_be_Call(const ir_node *irn)
{
	ir_entity *entity = be_Call_get_entity(irn);

	if (entity != NULL) {
		be_emit_cstring("\tcall ");
	    sparc_emit_entity(entity);
448
		be_emit_cstring(", 0");
Hannes Rapp's avatar
Hannes Rapp committed
449
		be_emit_finish_line_gas(irn);
450
451
452
		be_emit_cstring("\tnop");
		be_emit_pad_comment();
		be_emit_cstring("/* TODO: use delay slot */\n");
Hannes Rapp's avatar
Hannes Rapp committed
453
	} else {
454
455
456
		be_emit_cstring("\tnop\n");
		be_emit_pad_comment();
		be_emit_cstring("/* TODO: Entity == NULL */\n");
Hannes Rapp's avatar
Hannes Rapp committed
457
458
459
460
		be_emit_finish_line_gas(irn);
	}
}

461
/**
Hannes Rapp's avatar
Hannes Rapp committed
462
 * Emit code for Perm node
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
 */
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
491
492
493
494
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
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
/**
 * 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;

	/* 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");

	for (i = 0; i < memperm_arity; ++i) {
		int offset;
		ir_entity *entity = be_get_MemPerm_in_entity(node, i);

		/* spill register */
		sp_change += 4;
		be_emit_irprintf("\tst %%l%d, [%%sp-%d]", i, sp_change);
		be_emit_finish_line_gas(node);

		/* load from entity */
		offset = get_entity_offset(entity) + sp_change;
		be_emit_irprintf("\tld [%%sp+%d], %%l%d", offset, i);
		be_emit_finish_line_gas(node);
	}

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

		/* store to new entity */
		offset = get_entity_offset(entity) + sp_change;
		be_emit_irprintf("\tst %%l%d, [%%sp+%d]", i, offset);
		be_emit_finish_line_gas(node);
		/* restore register */
		be_emit_irprintf("\tld [%%sp-%d], %%l%d", sp_change, i);
		sp_change -= 4;
		be_emit_finish_line_gas(node);
	}
	assert(sp_change == 0);
}

Hannes Rapp's avatar
Hannes Rapp committed
539
540
541
542
543
544
545
/**
 * Emit a SymConst.
 */
static void emit_sparc_SymConst(const ir_node *irn)
{
	const sparc_symconst_attr_t *attr = get_sparc_symconst_attr_const(irn);

546
547
	//sethi %hi(const32),%reg
	//or    %reg,%lo(const32),%reg
Hannes Rapp's avatar
Hannes Rapp committed
548

549
550
551
	be_emit_cstring("\tsethi %hi(");
	be_gas_emit_entity(attr->entity);
	be_emit_cstring("), ");
552
553
	sparc_emit_dest_register(irn, 0);
	be_emit_cstring("\n ");
554
555

	// TODO: could be combined with the following load/store instruction
556
557
	be_emit_cstring("\tor ");
	sparc_emit_dest_register(irn, 0);
558
559
560
	be_emit_cstring(", %lo(");
	be_gas_emit_entity(attr->entity);
	be_emit_cstring("), ");
Hannes Rapp's avatar
Hannes Rapp committed
561
562
563
564
565
566
567
568
569
570
	sparc_emit_dest_register(irn, 0);
	be_emit_finish_line_gas(irn);
}

/**
 * Emits code for FrameAddr fix
 */
static void emit_sparc_FrameAddr(const ir_node *irn)
{
	const sparc_symconst_attr_t *attr = get_irn_generic_attr_const(irn);
571
572
573
574
575
576

	// no need to fix offset as we are adressing via the framepointer
	if (attr->fp_offset >= 0) {
		be_emit_cstring("\tadd ");
		sparc_emit_source_register(irn, 0);
		be_emit_cstring(", ");
577
		be_emit_irprintf("%ld", attr->fp_offset);
578
579
580
581
582
583
584
	} else {
		be_emit_cstring("\tsub ");
		sparc_emit_source_register(irn, 0);
		be_emit_cstring(", ");
		be_emit_irprintf("%ld", -attr->fp_offset);
	}

Hannes Rapp's avatar
Hannes Rapp committed
585
	be_emit_cstring(", ");
586
	sparc_emit_dest_register(irn, 0);
Hannes Rapp's avatar
Hannes Rapp committed
587
588
589
590
591
592
593
	be_emit_finish_line_gas(irn);
}


/**
 * Emits code for Branch
 */
594
static void emit_sparc_BXX(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
595
{
596
597
598
599
600
	const sparc_jmp_cond_attr_t *attr = get_sparc_jmp_cond_attr_const(node);
	int              proj_num    = attr->proj_num;
	bool             is_unsigned = attr->is_unsigned;
	const ir_node   *proj_true   = NULL;
	const ir_node   *proj_false  = NULL;
601
	const ir_edge_t *edge;
602
603
604
605
606
	const ir_node   *block;
	const ir_node   *next_block;
	const char      *suffix;

	foreach_out_edge(node, edge) {
607
608
609
610
611
612
613
614
615
616
		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 */
617
	block = get_nodes_block(node);
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633

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

	assert(proj_num != pn_Cmp_False);
	assert(proj_num != pn_Cmp_True);

	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;
		proj_num   = get_negated_pnc(proj_num, mode_Iu);
	}

634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
	if (is_unsigned) {
		switch (proj_num) {
			case pn_Cmp_Eq:  suffix = "e"; break;
			case pn_Cmp_Lt:  suffix = "lu"; break;
			case pn_Cmp_Le:  suffix = "leu"; break;
			case pn_Cmp_Gt:  suffix = "gu"; break;
			case pn_Cmp_Ge:  suffix = "geu"; break;
			case pn_Cmp_Lg:  suffix = "ne"; break;
			default: panic("Cmp has unsupported pnc");
		}
	} else {
		switch (proj_num) {
			case pn_Cmp_Eq:  suffix = "e"; break;
			case pn_Cmp_Lt:  suffix = "l"; break;
			case pn_Cmp_Le:  suffix = "le"; break;
			case pn_Cmp_Gt:  suffix = "g"; break;
			case pn_Cmp_Ge:  suffix = "ge"; break;
			case pn_Cmp_Lg:  suffix = "ne"; break;
			default: panic("Cmp has unsupported pnc");
		}
654
655
656
	}

	/* emit the true proj */
657
658
659
	be_emit_cstring("\tb");
	be_emit_string(suffix);
	be_emit_char(' ');
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
	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) {
		be_emit_cstring("\t/* false-fallthrough to ");
		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);
676
677
		be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
		be_emit_finish_line_gas(proj_false);
678
	}
Hannes Rapp's avatar
Hannes Rapp committed
679
680
}

681
/**
682
 * emit Jmp (which actually is a branch always (ba) instruction)
683
 */
684
static void emit_sparc_Ba(const ir_node *node)
685
686
687
688
689
690
691
692
693
694
695
{
	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);
696
697
		be_emit_finish_line_gas(node);
		be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
698
699
700
701
702
703
704
705
	} else {
		be_emit_cstring("\t/* fallthrough to ");
		sparc_emit_cfop_target(node);
		be_emit_cstring(" */");
	}
	be_emit_finish_line_gas(node);
}

706
707
708
/**
 * emit copy node
 */
709
710
static void emit_be_Copy(const ir_node *irn)
{
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
	ir_mode *mode = get_irn_mode(irn);

	if (get_in_reg(irn, 0) == get_out_reg(irn, 0)) {
		/* omitted Copy */
		return;
	}

	if (mode_is_float(mode)) {
		panic("emit_be_Copy: move not supported for FP");
	} else if (mode_is_data(mode)) {
		be_emit_cstring("\tmov ");
		sparc_emit_source_register(irn, 0);
		be_emit_cstring(", ");
		sparc_emit_dest_register(irn, 0);
		be_emit_finish_line_gas(irn);
	} else {
		panic("emit_be_Copy: move not supported for this mode");
	}
}


Hannes Rapp's avatar
Hannes Rapp committed
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
/**
 * 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 */
767
768
769
770
771
772
773
	set_emitter(op_be_Call,         emit_be_Call);
	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);
774
	set_emitter(op_sparc_BXX,       emit_sparc_BXX);
775
776
777
	set_emitter(op_sparc_Div,       emit_sparc_Div);
	set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
	set_emitter(op_sparc_HiImm,     emit_sparc_HiImm);
778
	set_emitter(op_sparc_Ba,        emit_sparc_Ba);
779
780
781
782
783
784
785
786
787
788
789
	set_emitter(op_sparc_LoImm,     emit_sparc_LoImm);
	set_emitter(op_sparc_Mul,       emit_sparc_Mul);
	set_emitter(op_sparc_Mulh,      emit_sparc_Mulh);
	set_emitter(op_sparc_Save,      emit_sparc_Save);
	set_emitter(op_sparc_SymConst,  emit_sparc_SymConst);

	/* 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
790
791
792
793
794
}

/**
 * Emits code for a node.
 */
795
static void sparc_emit_node(const ir_node *node)
Hannes Rapp's avatar
Hannes Rapp committed
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
{
	ir_op               *op       = get_irn_op(node);

	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 {
		panic("Error: No emit handler for node %+F (graph %+F)\n",
			node, current_ir_graph);
	}
}

/**
 * Walks over the nodes in a block connected by scheduling edges
 * and emits code for each node.
 */
813
static void sparc_gen_block(ir_node *block, void *data)
814
{
Hannes Rapp's avatar
Hannes Rapp committed
815
816
817
818
819
	ir_node *node;
	(void) data;

	if (! is_Block(block))
		return;
820
821
822

	be_gas_emit_block_name(block);
	be_emit_cstring(":\n");
Hannes Rapp's avatar
Hannes Rapp committed
823
	be_emit_write_line();
824

Hannes Rapp's avatar
Hannes Rapp committed
825
826
827
828
829
830
831
832
833
	sched_foreach(block, node) {
		sparc_emit_node(node);
	}
}


/**
 * Emits code for function start.
 */
834
static void sparc_emit_func_prolog(ir_graph *irg)
835
{
Hannes Rapp's avatar
Hannes Rapp committed
836
	ir_entity *ent = get_irg_entity(irg);
837
	be_gas_emit_function_prolog(ent, 4);
Hannes Rapp's avatar
Hannes Rapp committed
838
839
840
841
842
843
	be_emit_write_line();
}

/**
 * Emits code for function end
 */
844
static void sparc_emit_func_epilog(ir_graph *irg)
845
{
Hannes Rapp's avatar
Hannes Rapp committed
846
847
	ir_entity *ent = get_irg_entity(irg);
	const char *irg_name = get_entity_ld_name(ent);
848
	be_emit_write_line();
Hannes Rapp's avatar
Hannes Rapp committed
849
850
851
852
853
854
855
856
	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();
}

/**
857
858
859
 * 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
860
 */
861
static void sparc_gen_labels(ir_node *block, void *env)
862
{
Hannes Rapp's avatar
Hannes Rapp committed
863
864
865
866
867
868
	ir_node *pred;
	int n = get_Block_n_cfgpreds(block);
	(void) env;

	for (n--; n >= 0; n--) {
		pred = get_Block_cfgpred(block, n);
869
		set_irn_link(pred, block); // link the pred of a block (which is a jmp)
Hannes Rapp's avatar
Hannes Rapp committed
870
871
872
873
874
875
876
877
878
	}
}


/**
 * Main driver
 */
void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
{
879
880
	ir_node **blk_sched;
	ir_node *last_block = NULL;
Hannes Rapp's avatar
Hannes Rapp committed
881
	ir_entity *entity     = get_irg_entity(irg);
882
	int i, n;
883
	(void) cg;
Hannes Rapp's avatar
Hannes Rapp committed
884

885
	be_gas_elf_type_char = '#';
886
	be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF_SPARC;
887

Hannes Rapp's avatar
Hannes Rapp committed
888
889
	/* register all emitter functions */
	sparc_register_emitters();
890
	be_dbg_method_begin(entity);
891
892

	/* create the block schedule. For now, we don't need it earlier. */
893
	blk_sched = be_create_block_schedule(irg);
894
895

	// emit function prolog
Hannes Rapp's avatar
Hannes Rapp committed
896
	sparc_emit_func_prolog(irg);
897
898

	// generate BLOCK labels
Hannes Rapp's avatar
Hannes Rapp committed
899
900
	irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);

901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
	// 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
918
919
920
921
922
923
}

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