bearch_ppc32.c 24.8 KB
Newer Older
Christian Würdig's avatar
Christian Würdig committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
/*
 * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
 *
 * 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
40
#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"

41
#include "../bearch_t.h"                /* the general register allocator interface */
42
43
44
#include "../benode_t.h"
#include "../belower.h"
#include "../besched_t.h"
45
#include "be.h"
46
#include "../beabi.h"
47
#include "../bemachine.h"
48
#include "../bemodule.h"
Michael Beck's avatar
Michael Beck committed
49
#include "../bespillslots.h"
50
#include "../beblocksched.h"
51
#include "../beirg_t.h"
Michael Beck's avatar
Michael Beck committed
52
#include "../begnuas.h"
53
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

#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.
 */
Matthias Braun's avatar
Matthias Braun committed
88
89
90
static const
arch_register_req_t *ppc32_get_irn_reg_req(const void *self,
                                           const ir_node *irn, int pos) {
91
92
	long               node_pos = pos == -1 ? 0 : pos;
	ir_mode           *mode     = get_irn_mode(irn);
93
	FIRM_DBG_REGISTER(firm_dbg_module_t *mod, DEBUG_MODULE);
94
95
96

	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
97
		return arch_no_register_req;
98
99
100
101
	}

	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
102
		return arch_no_register_req;
103
104
105
106
107
108
109
110
111
	}

	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
112
		} else {
113
114
115
			node_pos = pos;
		}

Matthias Braun's avatar
Matthias Braun committed
116
		irn = skip_Proj_const(irn);
117
118
119
120
121
122

		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
123
		const arch_register_req_t *req;
124
		if (pos >= 0) {
Matthias Braun's avatar
Matthias Braun committed
125
126
127
			req = get_ppc32_in_req(irn, pos);
		} else {
			req = get_ppc32_out_req(irn, node_pos);
128
129
130
		}

		DB((mod, LEVEL_1, "returning reqs for %+F at pos %d\n", irn, pos));
Matthias Braun's avatar
Matthias Braun committed
131
		return req;
132
133
	}

Matthias Braun's avatar
Matthias Braun committed
134
135
136
137
138
	/* 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;
139
140
141
142
143
144
145
146
147
148
149
150
}

static void ppc32_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg) {
	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
151
		irn = skip_Proj(irn);
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
	}

	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);
	}
}

static const arch_register_t *ppc32_get_irn_reg(const void *self, const ir_node *irn) {
	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
177
		irn = skip_Proj_const(irn);
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
	}

	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;
}

static arch_irn_class_t ppc32_classify(const void *self, const ir_node *irn) {
Matthias Braun's avatar
Matthias Braun committed
193
	irn = skip_Proj_const(irn);
194
195
196
197
198
199
200
201
202
203
204
205

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

	return 0;
}

static arch_irn_flags_t ppc32_get_flags(const void *self, const ir_node *irn) {
Matthias Braun's avatar
Matthias Braun committed
206
	irn = skip_Proj_const(irn);
207
208
209
210
211
212
213
214
215
216
217

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

	return 0;
}

218
static ir_entity *ppc32_get_frame_entity(const void *self, const ir_node *irn) {
219
220
221
222
223
	if(!is_ppc32_irn(irn)) return NULL;
	if(get_ppc32_type(irn)!=ppc32_ac_FrameEntity) return NULL;
	return get_ppc32_frame_entity(irn);
}

Matthias Braun's avatar
Matthias Braun committed
224
static void ppc32_set_frame_entity(const void *self, ir_node *irn, ir_entity *ent) {
225
226
227
228
229
	if (! is_ppc32_irn(irn) || get_ppc32_type(irn) != ppc32_ac_FrameEntity)
		return;
	set_ppc32_frame_entity(irn, ent);
}

230
231
232
233
234
235
236
237
/**
 * This function is called by the generic backend to correct offsets for
 * nodes accessing the stack.
 */
static void ppc32_set_stack_bias(const void *self, ir_node *irn, int bias) {
	set_ppc32_offset(irn, bias);
}

238
239
240
241
static int ppc32_get_sp_bias(const void *self, const ir_node *irn) {
	return 0;
}

242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
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));
	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;
280
	static ir_entity *old_bp_ent = NULL;
281
282

	if(!between_type) {
283
		ir_entity *ret_addr_ent;
284
285
286
287
288
289
290
		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);

291
292
		set_entity_offset(old_bp_ent, 0);
		set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
		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)
{
}

/**
 * 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);
	isleaf = flags.bits.irg_is_leaf;

	if(flags.bits.try_omit_fp)
Michael Beck's avatar
Michael Beck committed
324
		return &ppc32_gp_regs[REG_R1];
325
	else
Michael Beck's avatar
Michael Beck committed
326
		return &ppc32_gp_regs[REG_R31];
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
}

/**
 * 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)
{
}

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 */

static const arch_irn_ops_if_t ppc32_irn_ops_if = {
	ppc32_get_irn_reg_req,
	ppc32_set_irn_reg,
	ppc32_get_irn_reg,
	ppc32_classify,
	ppc32_get_flags,
	ppc32_get_frame_entity,
360
	ppc32_set_frame_entity,
361
	ppc32_set_stack_bias,
362
	ppc32_get_sp_bias,
363
364
365
366
	NULL,    /* get_inverse             */
	NULL,    /* get_op_estimated_cost   */
	NULL,    /* possible_memory_operand */
	NULL,    /* perform_memory_operand  */
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
425
426
427
428
};

ppc32_irn_ops_t ppc32_irn_ops = {
	&ppc32_irn_ops_if,
	NULL
};



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

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);

429
	ppc32_register_transformers();
430
431
432
433
434
435
436
437
438
439
	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.
 */
440
static void ppc32_finish_irg(void *self) {
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
	/* 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) {
	/* 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;
461
	cg->blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
462
463
464
465
466
467
468
469
}

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))
	{
470
471
472
		ir_node  *store, *proj;
		dbg_info *dbg   = get_irn_dbg_info(node);
		ir_node  *block = get_nodes_block(node);
473
474
475

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

Michael Beck's avatar
Michael Beck committed
476
		if (regclass == &ppc32_reg_classes[CLASS_ppc32_gp])
477
478
		{
			store = new_rd_ppc32_Stw(dbg, current_ir_graph, block,
Michael Beck's avatar
Michael Beck committed
479
				get_irn_n(node, 0), get_irn_n(node, 1), new_rd_NoMem(current_ir_graph));
480
		}
Michael Beck's avatar
Michael Beck committed
481
		else if (regclass == &ppc32_reg_classes[CLASS_ppc32_fp])
482
483
		{
			store = new_rd_ppc32_Stfd(dbg, current_ir_graph, block,
Michael Beck's avatar
Michael Beck committed
484
				get_irn_n(node, 0), get_irn_n(node, 1), new_rd_NoMem(current_ir_graph));
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
		}
		else assert(0 && "Spill for register class not supported yet!");

		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;
506
507
508
		dbg_info *dbg   = get_irn_dbg_info(node);
		ir_node  *block = get_nodes_block(node);
		ir_mode  *mode  = get_irn_mode(node);
509
510
511

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

Michael Beck's avatar
Michael Beck committed
512
		if (regclass == &ppc32_reg_classes[CLASS_ppc32_gp])
513
		{
Michael Beck's avatar
Michael Beck committed
514
			load = new_rd_ppc32_Lwz(dbg, current_ir_graph, block,	get_irn_n(node, 0), get_irn_n(node, 1));
515
		}
Michael Beck's avatar
Michael Beck committed
516
		else if (regclass == &ppc32_reg_classes[CLASS_ppc32_fp])
517
		{
Michael Beck's avatar
Michael Beck committed
518
			load = new_rd_ppc32_Lfd(dbg, current_ir_graph, block,	get_irn_n(node, 0), get_irn_n(node, 1));
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
		}
		else assert(0 && "Reload for register class not supported yet!");

		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
546
	be_coalesce_spillslots(cg->birg);
547
548
549
550
551
552
553
554
555
	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
556
	ir_graph         *irg = cg->irg;
557
558

	dump_ir_block_graph_sched(irg, "-ppc-finished");
Michael Beck's avatar
Michael Beck committed
559
	ppc32_gen_routine(cg, irg);
560
561
562
563
564
565
566
567

	cur_reg_set = NULL;

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

568
int is_direct_entity(ir_entity *ent);
569

Matthias Braun's avatar
Matthias Braun committed
570
static void *ppc32_cg_init(be_irg_t *birg);
571
572
573
574
575

static const arch_code_generator_if_t ppc32_code_gen_if = {
	ppc32_cg_init,
	ppc32_before_abi,
	ppc32_prepare_graph,
576
	NULL,                 /* spill */
577
578
579
	ppc32_before_sched,   /* before scheduling hook */
	ppc32_before_ra,      /* before register allocation hook */
	ppc32_after_ra,
580
	ppc32_finish_irg,
581
582
583
584
585
586
	ppc32_emit_and_done
};

/**
 * Initializes the code generator.
 */
Matthias Braun's avatar
Matthias Braun committed
587
static void *ppc32_cg_init(be_irg_t *birg) {
588
589
590
591
592
593
594
	ppc32_isa_t      *isa = (ppc32_isa_t *)birg->main_env->arch_env->isa;
	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);
	cg->arch_env  = birg->main_env->arch_env;
595
	cg->isa       = isa;
596
597
598
599
600
	cg->birg      = birg;
	cg->area_size = 0;
	cg->area      = NULL;
	cg->start_succ_block = NULL;
	cg->blk_sched = NULL;
601
	FIRM_DBG_REGISTER(cg->mod, "firm.be.ppc.cg");
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621

	cur_reg_set = cg->reg_set;
	ppc32_irn_ops.cg = cg;

	return (arch_code_generator_t *)cg;
}



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

static ppc32_isa_t ppc32_isa_template = {
Michael Beck's avatar
Michael Beck committed
622
623
624
625
626
627
	{
		&ppc32_isa_if,           /* isa interface */
		&ppc32_gp_regs[REG_R1],  /* stack pointer */
		&ppc32_gp_regs[REG_R31], /* base pointer */
		-1,                      /* stack is decreasing */
		NULL,                    /* main environment */
628
629
		7,                       /* spill costs */
		5,                       /* reload costs */
Michael Beck's avatar
Michael Beck committed
630
631
632
	},
	{ NULL, },              /* emitter environment */
	NULL                    /* symbol set */
633
634
};

Michael Beck's avatar
Michael Beck committed
635
636
637
638
639
640
641
642
643
644
645
/**
 * 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
646
		set_entity_backend_marked(ent, 1);
Michael Beck's avatar
Michael Beck committed
647
648
649
650
651
		if (! is_direct_entity(ent))
			pset_insert_ptr(symbol_set, ent);
	}
}

652
653
654
/**
 * Initializes the backend ISA and opens the output file.
 */
655
static void *ppc32_init(FILE *file_handle) {
656
657
	static int inited = 0;
	ppc32_isa_t *isa;
Michael Beck's avatar
Michael Beck committed
658
	int i;
659

Michael Beck's avatar
Michael Beck committed
660
	if (inited)
661
662
		return NULL;

663
	isa = xmalloc(sizeof(*isa));
664
665
	memcpy(isa, &ppc32_isa_template, sizeof(*isa));

Michael Beck's avatar
Michael Beck committed
666
	be_emit_init_env(&isa->emit, file_handle);
667

Matthias Braun's avatar
Matthias Braun committed
668
	ppc32_register_init();
669
670
671
672
	ppc32_create_opcodes();

	inited = 1;

Michael Beck's avatar
Michael Beck committed
673
674
675
676
677
678
679
680
681
682
683
684
	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();

685
686
687
	return isa;
}

Michael Beck's avatar
Michael Beck committed
688
689
static void ppc32_dump_indirect_symbols(ppc32_isa_t *isa) {
	ir_entity *ent;
690

Michael Beck's avatar
Michael Beck committed
691
692
693
694
695
696
	foreach_pset(isa->symbol_set, ent) {
		const char *ld_name = get_entity_ld_name(ent);
		be_emit_irprintf(&isa->emit, ".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(&isa->emit);
	}
}
697
698
699
700
701

/**
 * Closes the output file and frees the ISA structure.
 */
static void ppc32_done(void *self) {
Michael Beck's avatar
Michael Beck committed
702
703
704
705
706
707
708
709
710
	ppc32_isa_t *isa = self;

	be_gas_emit_decls(&isa->emit, isa->arch_isa.main_env, 1);
	be_gas_emit_switch_section(&isa->emit, GAS_SECTION_DATA);
	ppc32_dump_indirect_symbols(isa);

	be_emit_destroy_env(&isa->emit);
	del_pset(isa->symbol_set);

711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
	free(self);
}



static int ppc32_get_n_reg_class(const void *self) {
	return N_CLASSES;
}

static const arch_register_class_t *ppc32_get_reg_class(const void *self, int i) {
	assert(i >= 0 && i < N_CLASSES && "Invalid ppc register class requested.");
	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) {
	if (mode_is_float(mode))
Michael Beck's avatar
Michael Beck committed
735
		return &ppc32_reg_classes[CLASS_ppc32_fp];
736
	else
Michael Beck's avatar
Michael Beck committed
737
		return &ppc32_reg_classes[CLASS_ppc32_gp];
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
}


/**
 * 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;
757
	be_abi_call_flags_t call_flags = { { 0, 0, 1, 0, 0, 0, 1 } };
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776

	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);
		if(is_atomic_type(tp))
		{
			mode = get_type_mode(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
777
					reg = &ppc32_fp_regs[fpregi++];
778
779
780
781
782
783
784
785
786
787
788
				}
				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
789
					reg = &ppc32_gp_regs[gpregi++];
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
				else
					reg = NULL;
				stackparamsize=4;
			}

			if(reg)
				be_abi_call_param_reg(abi, i, reg);
			else
			{
				be_abi_call_param_stack(abi, i, 4, stackoffs-lastoffs, 0);
				lastoffs = stackoffs+stackparamsize;
			}
			stackoffs += stackparamsize;
		}
		else
		{
			be_abi_call_param_stack(abi, i, 4, stackoffs-lastoffs, 0);
			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
818
			mode_is_float(mode) ? &ppc32_fp_regs[REG_F1] : &ppc32_gp_regs[REG_R3]);
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
	}
}

static const void *ppc32_get_irn_ops(const arch_irn_handler_t *self, const ir_node *irn) {
	return &ppc32_irn_ops;
}

const arch_irn_handler_t ppc32_irn_handler = {
	ppc32_get_irn_ops
};

const arch_irn_handler_t *ppc32_get_irn_handler(const void *self) {
	return &ppc32_irn_handler;
}

int ppc32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
835
836
837
838
	if(!is_ppc32_irn(irn))
		return -1;

	return 1;
839
840
841
842
843
844
845
846
847
848
849
850
851
852
}

/**
 * Initializes the code generator interface.
 */
static const arch_code_generator_if_t *ppc32_get_code_generator_if(void *self) {
	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
853
static const list_sched_selector_t *ppc32_get_list_sched_selector(const void *self, list_sched_selector_t *selector) {
854
855
856
857
858
	memcpy(&ppc32_sched_selector, trivial_selector, sizeof(list_sched_selector_t));
	ppc32_sched_selector.to_appear_in_schedule = ppc32_to_appear_in_schedule;
	return &ppc32_sched_selector;
}

859
860
861
862
static const ilp_sched_selector_t *ppc32_get_ilp_sched_selector(const void *self) {
	return NULL;
}

863
864
865
866
867
868
869
870
/**
 * 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);
	return get_mode_size_bytes(mode);
}

871
872
873
874
875
876
877
878
879
880
881
882
static const be_execution_unit_t ***ppc32_get_allowed_execution_units(const void *self, const ir_node *irn) {
	/* TODO */
	assert(0);
	return NULL;
}

static const be_machine_t *ppc32_get_machine(const void *self) {
	/* TODO */
	assert(0);
	return NULL;
}

883
884
885
/**
 * Return irp irgs in the desired order.
 */
Christian Würdig's avatar
Christian Würdig committed
886
static ir_graph **ppc32_get_irg_list(const void *self, ir_graph ***irg_list) {
887
888
889
	return NULL;
}

Michael Beck's avatar
Michael Beck committed
890
891
892
893
894
895
896
897
898
899
900
901
902
/**
 * Returns the libFirm configuration parameter for this backend.
 */
static const backend_params *ppc32_get_libfirm_params(void) {
	static arch_dep_params_t ad = {
		1,  /* allow subs */
		0,	/* Muls are fast enough on ARM */
		31, /* shift would be ok */
		0,  /* SMUL is needed, only in Arch M*/
		0,  /* UMUL is needed, only in Arch M */
		32, /* SMUL & UMUL available for 32 bit */
	};
	static backend_params p = {
903
904
		1,     /* need dword lowering */
		0,     /* don't support inlien assembler yet */
Michael Beck's avatar
Michael Beck committed
905
906
907
		NULL,  /* no additional opcodes */
		NULL,  /* will be set later */
		NULL,  /* but yet no creator function */
908
		NULL,  /* context for create_intrinsic_fkt */
Michael Beck's avatar
Michael Beck committed
909
		NULL,  /* no if conversion settings */
Michael Beck's avatar
Michael Beck committed
910
911
912
913
914
915
	};

	p.dep_param = &ad;
	return &p;
}

916
917
918
919
920
921
922
923
924
925
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_irn_handler,
	ppc32_get_code_generator_if,
	ppc32_get_list_sched_selector,
926
	ppc32_get_ilp_sched_selector,
927
	ppc32_get_reg_class_alignment,
Michael Beck's avatar
Michael Beck committed
928
	ppc32_get_libfirm_params,
929
930
	ppc32_get_allowed_execution_units,
	ppc32_get_machine,
931
	ppc32_get_irg_list,
932
};
933
934
935
936
937
938
939

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

BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_ppc32);