bearch_ppc32.c 24.5 KB
Newer Older
Christian Würdig's avatar
Christian Würdig committed
1
/*
Michael Beck's avatar
Michael Beck committed
2
 * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
Christian Würdig's avatar
Christian Würdig committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 *
 * This file is part of libFirm.
 *
 * This file may be distributed and/or modified under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * Licensees holding valid libFirm Professional Edition licenses may use
 * this file in accordance with the libFirm Commercial License.
 * Agreement provided with the Software.
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */

20
21
22
23
24
25
/**
 * @file
 * @brief   The main ppc backend driver file.
 * @author  Moritz Kroll, Jens Mueller
 * @version $Id$
 */
26
#ifdef HAVE_CONFIG_H
27
#include "config.h"
28
29
30
31
32
33
34
35
36
37
38
39
#endif

#include "pseudo_irg.h"
#include "irgwalk.h"
#include "irprog.h"
#include "irprintf.h"
#include "ircons.h"
#include "irgmod.h"
#include "irdump.h"

#include "bitset.h"
#include "debug.h"
Matthias Braun's avatar
Matthias Braun committed
40
#include "error.h"
41

42
#include "../bearch_t.h"                /* the general register allocator interface */
43
44
45
#include "../benode_t.h"
#include "../belower.h"
#include "../besched_t.h"
46
#include "be.h"
47
#include "../beabi.h"
48
#include "../bemachine.h"
49
#include "../bemodule.h"
Michael Beck's avatar
Michael Beck committed
50
#include "../bespillslots.h"
51
#include "../beblocksched.h"
52
#include "../beirg_t.h"
Michael Beck's avatar
Michael Beck committed
53
#include "../begnuas.h"
54
55
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

#include "pset.h"

#include "bearch_ppc32_t.h"

#include "ppc32_new_nodes.h"           /* ppc nodes interface */
#include "gen_ppc32_regalloc_if.h"     /* the generated interface (register type and class defenitions) */
#include "ppc32_transform.h"
#include "ppc32_transform_conv.h"
#include "ppc32_emitter.h"
#include "ppc32_map_regs.h"

#define DEBUG_MODULE "firm.be.ppc.isa"

int isleaf;

/* TODO: ugly, but we need it to get access to the registers assigned to Phi nodes */
static set *cur_reg_set = NULL;

/**************************************************
 *                         _ _              _  __
 *                        | | |            (_)/ _|
 *  _ __ ___  __ _    __ _| | | ___   ___   _| |_
 * | '__/ _ \/ _` |  / _` | | |/ _ \ / __| | |  _|
 * | | |  __/ (_| | | (_| | | | (_) | (__  | | |
 * |_|  \___|\__, |  \__,_|_|_|\___/ \___| |_|_|
 *            __/ |
 *           |___/
 **************************************************/

/**
 * Return register requirements for a ppc node.
 * If the node returns a tuple (mode_T) then the proj's
 * will be asked for this information.
 */
89
90
91
static const arch_register_req_t *ppc32_get_irn_reg_req(const ir_node *irn,
                                                        int pos)
{
92
93
	long               node_pos = pos == -1 ? 0 : pos;
	ir_mode           *mode     = get_irn_mode(irn);
94
	FIRM_DBG_REGISTER(firm_dbg_module_t *mod, DEBUG_MODULE);
95
96
97

	if (is_Block(irn) || mode == mode_X || mode == mode_M) {
		DBG((mod, LEVEL_1, "ignoring block, mode_X or mode_M node %+F\n", irn));
Matthias Braun's avatar
Matthias Braun committed
98
		return arch_no_register_req;
99
100
101
102
	}

	if (mode == mode_T && pos < 0) {
		DBG((mod, LEVEL_1, "ignoring request for OUT requirements at %+F", irn));
Matthias Braun's avatar
Matthias Braun committed
103
		return arch_no_register_req;
104
105
106
107
108
109
110
111
112
	}

	DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));

	if (is_Proj(irn)) {
		/* in case of a proj, we need to get the correct OUT slot */
		/* of the node corresponding to the proj number */
		if (pos == -1) {
			node_pos = ppc32_translate_proj_pos(irn);
Matthias Braun's avatar
Matthias Braun committed
113
		} else {
114
115
116
			node_pos = pos;
		}

Matthias Braun's avatar
Matthias Braun committed
117
		irn = skip_Proj_const(irn);
118
119
120
121
122
123

		DB((mod, LEVEL_1, "skipping Proj, going to %+F at pos %d ... ", irn, node_pos));
	}

	/* get requirements for our own nodes */
	if (is_ppc32_irn(irn)) {
Matthias Braun's avatar
Matthias Braun committed
124
		const arch_register_req_t *req;
125
		if (pos >= 0) {
Matthias Braun's avatar
Matthias Braun committed
126
127
128
			req = get_ppc32_in_req(irn, pos);
		} else {
			req = get_ppc32_out_req(irn, node_pos);
129
130
131
		}

		DB((mod, LEVEL_1, "returning reqs for %+F at pos %d\n", irn, pos));
Matthias Braun's avatar
Matthias Braun committed
132
		return req;
133
134
	}

Matthias Braun's avatar
Matthias Braun committed
135
136
137
138
139
	/* unknowns should be transformed by now */
	assert(!is_Unknown(irn));

	DB((mod, LEVEL_1, "returning NULL for %+F (node not supported)\n", irn));
	return arch_no_register_req;
140
141
}

142
143
static void ppc32_set_irn_reg(ir_node *irn, const arch_register_t *reg)
{
144
145
146
147
148
149
150
151
152
	int pos = 0;

	if (is_Proj(irn)) {

		if (get_irn_mode(irn) == mode_X) {
			return;
		}

		pos = ppc32_translate_proj_pos(irn);
Matthias Braun's avatar
Matthias Braun committed
153
		irn = skip_Proj(irn);
154
155
156
157
158
159
160
161
162
163
164
165
166
167
	}

	if (is_ppc32_irn(irn)) {
		const arch_register_t **slots;

		slots      = get_ppc32_slots(irn);
		slots[pos] = reg;
	}
	else {
		/* here we set the registers for the Phi nodes */
		ppc32_set_firm_reg(irn, reg, cur_reg_set);
	}
}

168
169
static const arch_register_t *ppc32_get_irn_reg(const ir_node *irn)
{
170
171
172
173
174
175
176
177
178
179
	int pos = 0;
	const arch_register_t *reg = NULL;

	if (is_Proj(irn)) {

		if (get_irn_mode(irn) == mode_X) {
			return NULL;
		}

		pos = ppc32_translate_proj_pos(irn);
Matthias Braun's avatar
Matthias Braun committed
180
		irn = skip_Proj_const(irn);
181
182
183
184
185
186
187
188
189
190
191
192
193
194
	}

	if (is_ppc32_irn(irn)) {
		const arch_register_t **slots;
		slots = get_ppc32_slots(irn);
		reg   = slots[pos];
	}
	else {
		reg = ppc32_get_firm_reg(irn, cur_reg_set);
	}

	return reg;
}

195
196
static arch_irn_class_t ppc32_classify(const ir_node *irn)
{
Matthias Braun's avatar
Matthias Braun committed
197
	irn = skip_Proj_const(irn);
198
199
200
201
202
203
204
205
206
207
208

	if (is_cfop(irn)) {
		return arch_irn_class_branch;
	}
	else if (is_ppc32_irn(irn)) {
		return arch_irn_class_normal;
	}

	return 0;
}

209
210
static arch_irn_flags_t ppc32_get_flags(const ir_node *irn)
{
Matthias Braun's avatar
Matthias Braun committed
211
	irn = skip_Proj_const(irn);
212
213
214
215
216
217
218
219
220
221
222

	if (is_ppc32_irn(irn)) {
		return get_ppc32_flags(irn);
	}
	else if (is_Unknown(irn)) {
		return arch_irn_flags_ignore;
	}

	return 0;
}

223
224
static ir_entity *ppc32_get_frame_entity(const ir_node *irn)
{
225
226
227
228
229
	if(!is_ppc32_irn(irn)) return NULL;
	if(get_ppc32_type(irn)!=ppc32_ac_FrameEntity) return NULL;
	return get_ppc32_frame_entity(irn);
}

230
231
static void ppc32_set_frame_entity(ir_node *irn, ir_entity *ent)
{
232
233
234
235
236
	if (! is_ppc32_irn(irn) || get_ppc32_type(irn) != ppc32_ac_FrameEntity)
		return;
	set_ppc32_frame_entity(irn, ent);
}

237
238
239
240
/**
 * This function is called by the generic backend to correct offsets for
 * nodes accessing the stack.
 */
241
242
static void ppc32_set_stack_bias(ir_node *irn, int bias)
{
243
244
245
	set_ppc32_offset(irn, bias);
}

246
247
static int ppc32_get_sp_bias(const ir_node *irn)
{
248
	(void) irn;
249
250
251
	return 0;
}

252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
typedef struct
{
	const be_abi_call_t *call;
	ir_graph *irg;
} ppc32_abi_env;

/**
 * Initialize the callback object.
 * @param call The call object.
 * @param aenv The architecture environment.
 * @param irg  The graph with the method.
 * @return     Some pointer. This pointer is passed to all other callback functions as self object.
 */
static void *ppc32_abi_init(const be_abi_call_t *call, const arch_env_t *aenv, ir_graph *irg)
{
	ppc32_abi_env *env = xmalloc(sizeof(ppc32_abi_env));
Michael Beck's avatar
Michael Beck committed
268
269
	(void) aenv;

270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
	env->call = call;
	env->irg = irg;
	return env;
}

/**
 * Destroy the callback object.
 * @param self The callback object.
 */
static void ppc32_abi_done(void *self)
{
	free(self);
}

/**
 * Get the between type for that call.
 * @param self The callback object.
 * @return The between type of for that call.
 */
static ir_type *ppc32_abi_get_between_type(void *self)
{
	static ir_type *between_type = NULL;
292
	static ir_entity *old_bp_ent = NULL;
293
	(void) self;
294
295

	if(!between_type) {
296
		ir_entity *ret_addr_ent;
297
298
299
300
301
302
303
		ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
		ir_type *old_bp_type   = new_type_primitive(new_id_from_str("bp"), mode_P);

		between_type           = new_type_class(new_id_from_str("ppc32_between_type"));
		old_bp_ent             = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
		ret_addr_ent           = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);

304
305
		set_entity_offset(old_bp_ent, 0);
		set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
306
307
308
309
310
311
312
313
314
315
316
317
318
		set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
	}

	return between_type;
}

/**
 * Put all registers which are saved by the prologue/epilogue in a set.
 * @param self The callback object.
 * @param regs A set.
 */
static void ppc32_abi_regs_saved_by_me(void *self, pset *regs)
{
319
320
	(void) self;
	(void) regs;
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
}

/**
 * Generate the prologue.
 * @param self    The callback object.
 * @param mem     A pointer to the mem node. Update this if you define new memory.
 * @param reg_map A mapping mapping all callee_save/ignore/parameter registers to their defining nodes.
 * @return        The register which shall be used as a stack frame base.
 *
 * All nodes which define registers in @p reg_map must keep @p reg_map current.
 */
static const arch_register_t *ppc32_abi_prologue(void *self, ir_node **mem, pmap *reg_map)
{
	ppc32_abi_env *env = (ppc32_abi_env *) self;
	be_abi_call_flags_t flags = be_abi_call_get_flags(env->call);
336
337
	(void) mem;
	(void) reg_map;
338
339
340
	isleaf = flags.bits.irg_is_leaf;

	if(flags.bits.try_omit_fp)
Michael Beck's avatar
Michael Beck committed
341
		return &ppc32_gp_regs[REG_R1];
342
	else
Michael Beck's avatar
Michael Beck committed
343
		return &ppc32_gp_regs[REG_R31];
344
345
346
347
348
349
350
351
352
353
354
355
356
}

/**
 * Generate the epilogue.
 * @param self    The callback object.
 * @param mem     Memory one can attach to.
 * @param reg_map A mapping mapping all callee_save/ignore/return registers to their defining nodes.
 *
 * All nodes which define registers in @p reg_map must keep @p reg_map current.
 * Also, the @p mem variable must be updated, if memory producing nodes are inserted.
 */
static void ppc32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_map)
{
357
358
359
360
	(void) self;
	(void) bl;
	(void) mem;
	(void) reg_map;
361
362
363
364
365
366
367
368
369
370
371
372
373
}

static const be_abi_callbacks_t ppc32_abi_callbacks = {
	ppc32_abi_init,
	ppc32_abi_done,
	ppc32_abi_get_between_type,
	ppc32_abi_regs_saved_by_me,
	ppc32_abi_prologue,
	ppc32_abi_epilogue,
};

/* fill register allocator interface */

Matthias Braun's avatar
Matthias Braun committed
374
static const arch_irn_ops_t ppc32_irn_ops = {
375
376
377
378
379
380
	ppc32_get_irn_reg_req,
	ppc32_set_irn_reg,
	ppc32_get_irn_reg,
	ppc32_classify,
	ppc32_get_flags,
	ppc32_get_frame_entity,
381
	ppc32_set_frame_entity,
382
	ppc32_set_stack_bias,
383
	ppc32_get_sp_bias,
384
385
386
387
	NULL,    /* get_inverse             */
	NULL,    /* get_op_estimated_cost   */
	NULL,    /* possible_memory_operand */
	NULL,    /* perform_memory_operand  */
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
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
};

/**************************************************
 *                _                         _  __
 *               | |                       (_)/ _|
 *   ___ ___   __| | ___  __ _  ___ _ __    _| |_
 *  / __/ _ \ / _` |/ _ \/ _` |/ _ \ '_ \  | |  _|
 * | (_| (_) | (_| |  __/ (_| |  __/ | | | | | |
 *  \___\___/ \__,_|\___|\__, |\___|_| |_| |_|_|
 *                        __/ |
 *                       |___/
 **************************************************/

static void ppc32_before_abi(void *self) {
	ppc32_code_gen_t *cg = self;
	ir_type *frame_type = get_irg_frame_type(cg->irg);

	frame_alloc_area(frame_type, 24, 4, 1);

	ppc32_init_conv_walk();
	irg_walk_blkwise_graph(cg->irg, NULL, ppc32_conv_walk, cg);

	if (cg->area_size) {
		if(cg->area_size < 32) cg->area_size = 32;
		cg->area = frame_alloc_area(get_irg_frame_type(cg->irg), cg->area_size+24, 16, 1);
	}
}

static void ppc32_search_start_successor(ir_node *block, void *env) {
	ppc32_code_gen_t *cg = env;
	int n = get_Block_n_cfgpreds(block);
	ir_node *startblock = get_irg_start_block(cg->irg);
	if(block == startblock) return;

	for (n--; n >= 0; n--) {
		ir_node *predblock = get_irn_n(get_Block_cfgpred(block, n), -1);
		if(predblock == startblock)
		{
			cg->start_succ_block = block;
			return;
		}
	}
}

/**
 * Transforms the standard firm graph into
 * a ppc firm graph
 */
static void ppc32_prepare_graph(void *self) {
	ppc32_code_gen_t *cg = self;

	irg_block_walk_graph(cg->irg, NULL, ppc32_search_start_successor, cg);
	irg_walk_blkwise_graph(cg->irg, NULL, ppc32_pretransform_walk, cg);
	be_dump(cg->irg, "-pretransformed", dump_ir_block_graph);

443
	ppc32_register_transformers();
444
445
446
447
448
449
450
451
452
453
	irg_walk_blkwise_graph(cg->irg, NULL, ppc32_transform_node, cg);
	be_dump(cg->irg, "-transformed", dump_ir_block_graph);
	irg_walk_blkwise_graph(cg->irg, NULL, ppc32_transform_const, cg);
}



/**
 * Called immediatly before emit phase.
 */
454
static void ppc32_finish_irg(void *self) {
455
	(void) self;
456
457
458
459
460
461
462
463
464
465
	/* TODO: - fix offsets for nodes accessing stack
			 - ...
	*/
}


/**
 * These are some hooks which must be filled but are probably not needed.
 */
static void ppc32_before_sched(void *self) {
466
	(void) self;
467
468
469
470
471
472
473
474
475
476
	/* Some stuff you need to do after scheduling but before register allocation */
}

/**
 * Called before the register allocator.
 * Calculate a block schedule here. We need it for the x87
 * simulator and the emitter.
 */
static void ppc32_before_ra(void *self) {
	ppc32_code_gen_t *cg = self;
477
	cg->blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
478
479
480
481
482
483
484
485
}

static void ppc32_transform_spill(ir_node *node, void *env)
{
	ppc32_code_gen_t *cgenv = (ppc32_code_gen_t *)env;

	if(be_is_Spill(node))
	{
486
487
488
		ir_node  *store, *proj;
		dbg_info *dbg   = get_irn_dbg_info(node);
		ir_node  *block = get_nodes_block(node);
489
490
491

		const arch_register_class_t *regclass = arch_get_irn_reg_class(cgenv->arch_env, node, 1);

Michael Beck's avatar
Michael Beck committed
492
		if (regclass == &ppc32_reg_classes[CLASS_ppc32_gp])
493
494
		{
			store = new_rd_ppc32_Stw(dbg, current_ir_graph, block,
Michael Beck's avatar
Michael Beck committed
495
				get_irn_n(node, 0), get_irn_n(node, 1), new_rd_NoMem(current_ir_graph));
496
		}
Michael Beck's avatar
Michael Beck committed
497
		else if (regclass == &ppc32_reg_classes[CLASS_ppc32_fp])
498
499
		{
			store = new_rd_ppc32_Stfd(dbg, current_ir_graph, block,
Michael Beck's avatar
Michael Beck committed
500
				get_irn_n(node, 0), get_irn_n(node, 1), new_rd_NoMem(current_ir_graph));
501
		}
Matthias Braun's avatar
Matthias Braun committed
502
		else panic("Spill for register class not supported yet!");
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521

		set_ppc32_frame_entity(store, be_get_frame_entity(node));

		proj = new_rd_Proj(dbg, current_ir_graph, block, store, mode_M, pn_Store_M);

		if (sched_is_scheduled(node)) {
			sched_add_after(sched_prev(node), store);
			sched_add_after(store, proj);

			sched_remove(node);
		}

		exchange(node, proj);
	}

	if(be_is_Reload(node))
	{
		ir_node *load, *proj;
		const arch_register_t *reg;
522
523
524
		dbg_info *dbg   = get_irn_dbg_info(node);
		ir_node  *block = get_nodes_block(node);
		ir_mode  *mode  = get_irn_mode(node);
525
526
527

		const arch_register_class_t *regclass = arch_get_irn_reg_class(cgenv->arch_env, node, -1);

Michael Beck's avatar
Michael Beck committed
528
		if (regclass == &ppc32_reg_classes[CLASS_ppc32_gp])
529
		{
Michael Beck's avatar
Michael Beck committed
530
			load = new_rd_ppc32_Lwz(dbg, current_ir_graph, block,	get_irn_n(node, 0), get_irn_n(node, 1));
531
		}
Michael Beck's avatar
Michael Beck committed
532
		else if (regclass == &ppc32_reg_classes[CLASS_ppc32_fp])
533
		{
Michael Beck's avatar
Michael Beck committed
534
			load = new_rd_ppc32_Lfd(dbg, current_ir_graph, block,	get_irn_n(node, 0), get_irn_n(node, 1));
535
		}
Matthias Braun's avatar
Matthias Braun committed
536
		else panic("Reload for register class not supported yet!");
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561

		set_ppc32_frame_entity(load, be_get_frame_entity(node));

		proj = new_rd_Proj(dbg, current_ir_graph, block, load, mode, pn_Load_res);

		if (sched_is_scheduled(node)) {
			sched_add_after(sched_prev(node), load);
			sched_add_after(load, proj);

			sched_remove(node);
		}

		/* copy the register from the old node to the new Load */
		reg = arch_get_irn_register(cgenv->arch_env, node);
		arch_set_irn_register(cgenv->arch_env, load, reg);

		exchange(node, proj);
	}
}

/**
 * Some stuff to do immediately after register allocation
 */
static void ppc32_after_ra(void *self) {
	ppc32_code_gen_t *cg = self;
Michael Beck's avatar
Michael Beck committed
562
	be_coalesce_spillslots(cg->birg);
563
564
565
566
567
568
569
570
571
	irg_walk_blkwise_graph(cg->irg, NULL, ppc32_transform_spill, cg);
}

/**
 * Emits the code, closes the output file and frees
 * the code generator interface.
 */
static void ppc32_emit_and_done(void *self) {
	ppc32_code_gen_t *cg = self;
Michael Beck's avatar
Michael Beck committed
572
	ir_graph         *irg = cg->irg;
573
574

	dump_ir_block_graph_sched(irg, "-ppc-finished");
Michael Beck's avatar
Michael Beck committed
575
	ppc32_gen_routine(cg, irg);
576
577
578
579
580
581
582
583

	cur_reg_set = NULL;

	/* de-allocate code generator */
	del_set(cg->reg_set);
	free(self);
}

584
int is_direct_entity(ir_entity *ent);
585

Matthias Braun's avatar
Matthias Braun committed
586
static void *ppc32_cg_init(be_irg_t *birg);
587
588
589

static const arch_code_generator_if_t ppc32_code_gen_if = {
	ppc32_cg_init,
590
	NULL,                 /* get_pic_base */
591
592
	ppc32_before_abi,
	ppc32_prepare_graph,
593
	NULL,                 /* spill */
594
595
596
	ppc32_before_sched,   /* before scheduling hook */
	ppc32_before_ra,      /* before register allocation hook */
	ppc32_after_ra,
597
	ppc32_finish_irg,
598
599
600
601
602
603
	ppc32_emit_and_done
};

/**
 * Initializes the code generator.
 */
Matthias Braun's avatar
Matthias Braun committed
604
static void *ppc32_cg_init(be_irg_t *birg) {
605
	ppc32_isa_t      *isa = (ppc32_isa_t *)birg->main_env->arch_env;
606
607
608
609
610
	ppc32_code_gen_t *cg  = xmalloc(sizeof(*cg));

	cg->impl      = &ppc32_code_gen_if;
	cg->irg       = birg->irg;
	cg->reg_set   = new_set(ppc32_cmp_irn_reg_assoc, 1024);
611
	cg->arch_env  = birg->main_env->arch_env;
612
	cg->isa       = isa;
613
614
615
616
617
	cg->birg      = birg;
	cg->area_size = 0;
	cg->area      = NULL;
	cg->start_succ_block = NULL;
	cg->blk_sched = NULL;
618
	FIRM_DBG_REGISTER(cg->mod, "firm.be.ppc.cg");
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637

	cur_reg_set = cg->reg_set;

	return (arch_code_generator_t *)cg;
}



/*****************************************************************
 *  ____             _                  _   _____  _____
 * |  _ \           | |                | | |_   _|/ ____|  /\
 * | |_) | __ _  ___| | _____ _ __   __| |   | | | (___   /  \
 * |  _ < / _` |/ __| |/ / _ \ '_ \ / _` |   | |  \___ \ / /\ \
 * | |_) | (_| | (__|   <  __/ | | | (_| |  _| |_ ____) / ____ \
 * |____/ \__,_|\___|_|\_\___|_| |_|\__,_| |_____|_____/_/    \_\
 *
 *****************************************************************/

static ppc32_isa_t ppc32_isa_template = {
Michael Beck's avatar
Michael Beck committed
638
639
640
641
642
	{
		&ppc32_isa_if,           /* isa interface */
		&ppc32_gp_regs[REG_R1],  /* stack pointer */
		&ppc32_gp_regs[REG_R31], /* base pointer */
		-1,                      /* stack is decreasing */
643
		2,                       /* power of two stack alignment for calls, 2^2 == 4 */
Michael Beck's avatar
Michael Beck committed
644
		NULL,                    /* main environment */
645
646
		7,                       /* spill costs */
		5,                       /* reload costs */
Michael Beck's avatar
Michael Beck committed
647
648
	},
	NULL                    /* symbol set */
649
650
};

Michael Beck's avatar
Michael Beck committed
651
652
653
654
655
656
657
658
659
660
661
/**
 * Collects all SymConsts which need to be accessed "indirectly"
 *
 * @param node    the firm node
 * @param env     the symbol set
 */
static void ppc32_collect_symconsts_walk(ir_node *node, void *env) {
	pset *symbol_set = env;

	if (is_SymConst(node)) {
		ir_entity *ent = get_SymConst_entity(node);
Michael Beck's avatar
Michael Beck committed
662
		set_entity_backend_marked(ent, 1);
Michael Beck's avatar
Michael Beck committed
663
664
665
666
667
		if (! is_direct_entity(ent))
			pset_insert_ptr(symbol_set, ent);
	}
}

668
669
670
/**
 * Initializes the backend ISA and opens the output file.
 */
671
static arch_env_t *ppc32_init(FILE *file_handle) {
672
673
	static int inited = 0;
	ppc32_isa_t *isa;
Michael Beck's avatar
Michael Beck committed
674
	int i;
675

Michael Beck's avatar
Michael Beck committed
676
	if (inited)
677
678
		return NULL;

679
	isa = xmalloc(sizeof(*isa));
680
681
	memcpy(isa, &ppc32_isa_template, sizeof(*isa));

682
	be_emit_init(file_handle);
683

Matthias Braun's avatar
Matthias Braun committed
684
	ppc32_register_init();
Matthias Braun's avatar
Matthias Braun committed
685
	ppc32_create_opcodes(&ppc32_irn_ops);
686
687
688

	inited = 1;

Michael Beck's avatar
Michael Beck committed
689
690
691
692
693
694
695
696
697
698
699
700
	isa->symbol_set = pset_new_ptr(8);
	for (i = 0; i < get_irp_n_irgs(); ++i) {
		ir_graph *irg = get_irp_irg(i);
		irg_walk_blkwise_graph(irg, NULL, ppc32_collect_symconsts_walk, isa->symbol_set);
	}

	/* we mark referenced global entities, so we can only emit those which
	 * are actually referenced. (Note: you mustn't use the type visited flag
	 * elsewhere in the backend)
	 */
	inc_master_type_visited();

701
	return &isa->arch_env;
702
703
}

Michael Beck's avatar
Michael Beck committed
704
705
static void ppc32_dump_indirect_symbols(ppc32_isa_t *isa) {
	ir_entity *ent;
706

Michael Beck's avatar
Michael Beck committed
707
708
	foreach_pset(isa->symbol_set, ent) {
		const char *ld_name = get_entity_ld_name(ent);
709
710
		be_emit_irprintf(".non_lazy_symbol_pointer\n%s:\n\t.indirect_symbol _%s\n\t.long 0\n\n", ld_name, ld_name);
		be_emit_write_line();
Michael Beck's avatar
Michael Beck committed
711
712
	}
}
713
714
715
716
717

/**
 * Closes the output file and frees the ISA structure.
 */
static void ppc32_done(void *self) {
Michael Beck's avatar
Michael Beck committed
718
719
	ppc32_isa_t *isa = self;

720
	be_gas_emit_decls(isa->arch_env.main_env, 1);
721
	be_gas_emit_switch_section(GAS_SECTION_DATA);
Michael Beck's avatar
Michael Beck committed
722
723
	ppc32_dump_indirect_symbols(isa);

724
	be_emit_exit();
Michael Beck's avatar
Michael Beck committed
725
726
	del_pset(isa->symbol_set);

727
728
729
730
731
	free(self);
}



732
static unsigned ppc32_get_n_reg_class(const void *self) {
733
	(void) self;
734
735
736
	return N_CLASSES;
}

737
738
static const arch_register_class_t *ppc32_get_reg_class(const void *self,
                                                        unsigned i) {
739
	(void) self;
740
	assert(i < N_CLASSES && "Invalid ppc register class requested.");
741
742
743
744
745
746
747
748
749
750
751
752
	return &ppc32_reg_classes[i];
}



/**
 * Get the register class which shall be used to store a value of a given mode.
 * @param self The this pointer.
 * @param mode The mode in question.
 * @return A register class which can hold values of the given mode.
 */
const arch_register_class_t *ppc32_get_reg_class_for_mode(const void *self, const ir_mode *mode) {
753
	(void) self;
754
	if (mode_is_float(mode))
Michael Beck's avatar
Michael Beck committed
755
		return &ppc32_reg_classes[CLASS_ppc32_fp];
756
	else
Michael Beck's avatar
Michael Beck committed
757
		return &ppc32_reg_classes[CLASS_ppc32_gp];
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
}


/**
 * Get the ABI restrictions for procedure calls.
 * @param self        The this pointer.
 * @param method_type The type of the method (procedure) in question.
 * @param abi         The abi object to be modified
 */
static void ppc32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
	ir_type  *tp;
	ir_mode  *mode;
	int       i, n = get_method_n_params(method_type);
	int		  stackoffs = 0, lastoffs = 0, stackparamsize;

	int		  gpregi = REG_R3;
	int		  fpregi = REG_F1;

	const arch_register_t *reg;
777
	be_abi_call_flags_t call_flags = { { 0, 0, 1, 0, 0, 0, 1 } };
778

779
	(void) self;
780
781
782
783
784
785
786
787
	if(get_type_visibility(method_type)!=visibility_external_allocated)
		call_flags.bits.call_has_imm = 1;

	/* set stack parameter passing style */
	be_abi_call_set_flags(abi, call_flags, &ppc32_abi_callbacks);

	for (i = 0; i < n; i++) {
		tp   = get_method_param_type(method_type, i);
788
		mode = get_type_mode(tp);
789
790
791
792
793
794
795
796
		if(is_atomic_type(tp))
		{
			if(mode_is_float(mode))
			{
				if(fpregi <= REG_F13)
				{
					if(get_mode_size_bits(mode) == 32) gpregi++, stackparamsize=4;
					else gpregi += 2, stackparamsize=8;								// mode == irm_D
Michael Beck's avatar
Michael Beck committed
797
					reg = &ppc32_fp_regs[fpregi++];
798
799
800
801
802
803
804
805
806
807
808
				}
				else
				{
					if(get_mode_size_bits(mode) == 32) stackparamsize=4;
					else stackparamsize=8;								// mode == irm_D
					reg = NULL;
				}
			}
			else
			{
				if(gpregi <= REG_R10)
Michael Beck's avatar
Michael Beck committed
809
					reg = &ppc32_gp_regs[gpregi++];
810
811
812
813
814
815
816
817
818
				else
					reg = NULL;
				stackparamsize=4;
			}

			if(reg)
				be_abi_call_param_reg(abi, i, reg);
			else
			{
819
				be_abi_call_param_stack(abi, i, mode, 4, stackoffs - lastoffs, 0);
820
821
822
823
824
825
				lastoffs = stackoffs+stackparamsize;
			}
			stackoffs += stackparamsize;
		}
		else
		{
826
			be_abi_call_param_stack(abi, i, mode, 4, stackoffs - lastoffs, 0);
827
828
829
830
831
832
833
834
835
836
837
			stackoffs += (get_type_size_bytes(tp)+3) & -4;
			lastoffs = stackoffs;
		}
	}

	/* explain where result can be found if any */
	if (get_method_n_ress(method_type) > 0) {
		tp   = get_method_res_type(method_type, 0);
		mode = get_type_mode(tp);

		be_abi_call_res_reg(abi, 0,
Michael Beck's avatar
Michael Beck committed
838
			mode_is_float(mode) ? &ppc32_fp_regs[REG_F1] : &ppc32_gp_regs[REG_R3]);
839
840
841
842
	}
}

int ppc32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
843
	(void) block_env;
844
845
846
847
	if(!is_ppc32_irn(irn))
		return -1;

	return 1;
848
849
850
851
852
853
}

/**
 * Initializes the code generator interface.
 */
static const arch_code_generator_if_t *ppc32_get_code_generator_if(void *self) {
854
	(void) self;
855
856
857
858
859
860
861
862
	return &ppc32_code_gen_if;
}

list_sched_selector_t ppc32_sched_selector;

/**
 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
 */
Christian Würdig's avatar
Christian Würdig committed
863
static const list_sched_selector_t *ppc32_get_list_sched_selector(const void *self, list_sched_selector_t *selector) {
864
865
	(void) self;
	(void) selector;
866
	ppc32_sched_selector = trivial_selector;
867
868
869
870
	ppc32_sched_selector.to_appear_in_schedule = ppc32_to_appear_in_schedule;
	return &ppc32_sched_selector;
}

871
static const ilp_sched_selector_t *ppc32_get_ilp_sched_selector(const void *self) {
872
	(void) self;
873
874
875
	return NULL;
}

876
877
878
879
880
/**
 * Returns the necessary byte alignment for storing a register of given class.
 */
static int ppc32_get_reg_class_alignment(const void *self, const arch_register_class_t *cls) {
	ir_mode *mode = arch_register_class_mode(cls);
Michael Beck's avatar
Michael Beck committed
881
882
	(void) self;

883
884
885
	return get_mode_size_bytes(mode);
}

886
static const be_execution_unit_t ***ppc32_get_allowed_execution_units(const void *self, const ir_node *irn) {
887
888
	(void) self;
	(void) irn;
889
890
891
892
893
894
	/* TODO */
	assert(0);
	return NULL;
}

static const be_machine_t *ppc32_get_machine(const void *self) {
895
	(void) self;
896
897
898
899
900
	/* TODO */
	assert(0);
	return NULL;
}

901
902
903
/**
 * Return irp irgs in the desired order.
 */
Christian Würdig's avatar
Christian Würdig committed
904
static ir_graph **ppc32_get_irg_list(const void *self, ir_graph ***irg_list) {
905
906
	(void) self;
	(void) irg_list;
907
908
909
	return NULL;
}

Michael Beck's avatar
Michael Beck committed
910
911
912
913
914
/**
 * Returns the libFirm configuration parameter for this backend.
 */
static const backend_params *ppc32_get_libfirm_params(void) {
	static backend_params p = {
915
		1,     /* need dword lowering */
916
917
		0,     /* don't support inline assembler yet */
		0,     /* no immediate floating point mode. */
Michael Beck's avatar
Michael Beck committed
918
919
920
		NULL,  /* no additional opcodes */
		NULL,  /* will be set later */
		NULL,  /* but yet no creator function */
921
		NULL,  /* context for create_intrinsic_fkt */
Michael Beck's avatar
Michael Beck committed
922
		NULL,  /* no if conversion settings */
923
		NULL   /* no immediate fp mode */
Michael Beck's avatar
Michael Beck committed
924
925
926
927
928
	};

	return &p;
}

929
930
931
932
933
934
935
936
937
const arch_isa_if_t ppc32_isa_if = {
	ppc32_init,
	ppc32_done,
	ppc32_get_n_reg_class,
	ppc32_get_reg_class,
	ppc32_get_reg_class_for_mode,
	ppc32_get_call_abi,
	ppc32_get_code_generator_if,
	ppc32_get_list_sched_selector,
938
	ppc32_get_ilp_sched_selector,
939
	ppc32_get_reg_class_alignment,
Michael Beck's avatar
Michael Beck committed
940
	ppc32_get_libfirm_params,
941
942
	ppc32_get_allowed_execution_units,
	ppc32_get_machine,
943
	ppc32_get_irg_list,
944
};
945
946
947
948
949
950
951

void be_init_arch_ppc32(void)
{
	be_register_isa_if("ppc32", &ppc32_isa_if);
}

BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_ppc32);