ia32_emitter.c 35.2 KB
Newer Older
1
2
3
4
5
6
/**
 * This file implements the node emitter.
 *
 * $Id$
 */

Christian Würdig's avatar
Christian Würdig committed
7
8
9
10
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

Christian Würdig's avatar
Christian Würdig committed
11
12
#include <limits.h>

13
#include "xmalloc.h"
14
15
#include "tv.h"
#include "iredges.h"
Christian Würdig's avatar
Christian Würdig committed
16
17
18
19
#include "debug.h"
#include "irgwalk.h"
#include "irprintf.h"
#include "irop_t.h"
Christian Würdig's avatar
Christian Würdig committed
20
#include "irargs_t.h"
21
#include "irprog_t.h"
22
#include "iredges_t.h"
Christian Würdig's avatar
Christian Würdig committed
23

24
#include "../besched_t.h"
Christian Würdig's avatar
Christian Würdig committed
25
#include "../benode_t.h"
Christian Würdig's avatar
Christian Würdig committed
26

27
#include "ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
28
#include "gen_ia32_emitter.h"
29
30
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
Christian Würdig's avatar
Christian Würdig committed
31
32
#include "ia32_map_regs.h"

Christian Würdig's avatar
Christian Würdig committed
33
34
35
36
37
38
39
40
#ifdef obstack_chunk_alloc
# undef obstack_chunk_alloc
# define obstack_chunk_alloc xmalloc
#else
# define obstack_chunk_alloc xmalloc
# define obstack_chunk_free free
#endif

Michael Beck's avatar
Michael Beck committed
41
42
#define BLOCK_PREFIX(x) ".L" ## x

43
44
extern int obstack_printf(struct obstack *obst, char *fmt, ...);

Christian Würdig's avatar
Christian Würdig committed
45
46
#define SNPRINTF_BUF_LEN 128

Christian Würdig's avatar
Christian Würdig committed
47
static const arch_env_t *arch_env = NULL;
48

Christian Würdig's avatar
Christian Würdig committed
49
50
51
52
53
54
55
56
57
58
59
60
61
62
/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

/* We always pass the ir_node which is a pointer. */
static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
	return lc_arg_type_ptr;
63
64
}

Christian Würdig's avatar
Christian Würdig committed
65
66

/**
Christian Würdig's avatar
Christian Würdig committed
67
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
68
 */
Christian Würdig's avatar
Christian Würdig committed
69
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
70
71
72
73
74
75
76
77
78
	ir_node                *op;
	const arch_register_t  *reg = NULL;

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

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

Christian Würdig's avatar
Christian Würdig committed
79
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
80

Christian Würdig's avatar
Christian Würdig committed
81
82
83
84
85
86
87
	assert(reg && "no in register found");
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
88
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
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
116
	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(irn) != mode_T) {
		reg = arch_get_irn_register(arch_env, irn);
	}
	else if (is_ia32_irn(irn)) {
		reg = get_ia32_out_reg(irn, pos);
	}
	else {
		const ir_edge_t *edge;

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

	assert(reg && "no out register found");
Christian Würdig's avatar
Christian Würdig committed
117
118
119
	return reg;
}

Michael Beck's avatar
Michael Beck committed
120
121
122
123
124
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
125
126
127
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
128
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
129
130
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
131
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
132
133
134
		reg = get_in_reg(irn, pos);
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
135
		/* destination address mode nodes don't have outputs */
136
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
137
138
139
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
140
141
142
143
		reg = get_out_reg(irn, pos);
	}

	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
}

/**
 * Get the register name for a node.
 */
static int ia32_get_reg_name(lc_appendable_t *app,
    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
{
	const char *buf;
	ir_node    *X  = arg->v_ptr;
	int         nr = occ->width - 1;

	if (!X)
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
159
	buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
160
161

	return lc_arg_append(app, occ, buf, strlen(buf));
162
163
}

Christian Würdig's avatar
Christian Würdig committed
164
/**
165
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
166
167
168
169
170
171
172
173
174
175
 */
static int ia32_const_to_str(lc_appendable_t *app,
    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
{
	const char *buf;
	ir_node    *X = arg->v_ptr;

	if (!X)
		return lc_arg_append(app, occ, "(null)", 6);

176
	if (occ->conversion == 'C') {
Christian Würdig's avatar
Christian Würdig committed
177
		buf = get_ia32_cnst(X);
Christian Würdig's avatar
Christian Würdig committed
178
	}
179
	else { /* 'O' */
Christian Würdig's avatar
Christian Würdig committed
180
		buf = get_ia32_am_offs(X);
Christian Würdig's avatar
Christian Würdig committed
181
182
	}

Sebastian Hack's avatar
Sebastian Hack committed
183
	return buf ? lc_arg_append(app, occ, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
184
185
186
187
188
189
190
191
}

/**
 * Determines the SSE suffix depending on the mode.
 */
static int ia32_get_mode_suffix(lc_appendable_t *app,
    const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
{
Christian Würdig's avatar
Christian Würdig committed
192
	ir_node *X    = arg->v_ptr;
193
194
195
196
197
	ir_mode *mode = get_irn_mode(X);

	if (mode == mode_T) {
		mode = is_ia32_AddrModeS(X) || is_ia32_AddrModeD(X) ? get_ia32_ls_mode(X) : get_ia32_res_mode(X);
	}
Christian Würdig's avatar
Christian Würdig committed
198
199
200
201

	if (!X)
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
202
203
204
205
206
207
208
	if (mode_is_float(mode)) {
		return lc_appendable_chadd(app, get_mode_size_bits(mode) == 32 ? 's' : 'd');
	}
	else {

		return lc_appendable_chadd(app, mode_is_signed(mode) ? 's' : 'z');
	}
Christian Würdig's avatar
Christian Würdig committed
209
210
211
212
213
214
215
}

/**
 * Return the ia32 printf arg environment.
 * We use the firm environment with some additional handlers.
 */
const lc_arg_env_t *ia32_get_arg_env(void) {
Christian Würdig's avatar
Christian Würdig committed
216
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
217

Christian Würdig's avatar
Christian Würdig committed
218
219
220
	static const lc_arg_handler_t ia32_reg_handler   = { ia32_get_arg_type, ia32_get_reg_name };
	static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
	static const lc_arg_handler_t ia32_mode_handler  = { ia32_get_arg_type, ia32_get_mode_suffix };
Christian Würdig's avatar
Christian Würdig committed
221

Christian Würdig's avatar
Christian Würdig committed
222
223
224
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
225

226
227
228
229
230
		lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
		lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
		lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
		lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
		lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
Christian Würdig's avatar
Christian Würdig committed
231
	}
Christian Würdig's avatar
Christian Würdig committed
232

Christian Würdig's avatar
Christian Würdig committed
233
	return env;
Christian Würdig's avatar
Christian Würdig committed
234
235
}

Christian Würdig's avatar
Christian Würdig committed
236
237
238
/**
 * Emits registers and/or address mode of a binary operation.
 */
239
char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
240
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
241

Christian Würdig's avatar
Christian Würdig committed
242
	/* verify that this function is never called on non-AM supporting operations */
Christian Würdig's avatar
Christian Würdig committed
243
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
Christian Würdig's avatar
Christian Würdig committed
244

245
246
247
248
249
250
#define PRODUCES_RESULT(n)   \
	(!(is_ia32_St(n)      || \
	is_ia32_Store8Bit(n)  || \
	is_ia32_CondJmp(n)    || \
	is_ia32_fCondJmp(n)   || \
	is_ia32_SwitchJmp(n)))
Christian Würdig's avatar
Christian Würdig committed
251

Christian Würdig's avatar
Christian Würdig committed
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
			if (get_ia32_cnst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
			else {
				const arch_register_t *in1 = get_in_reg(n, 2);
				const arch_register_t *in2 = get_in_reg(n, 3);
Christian Würdig's avatar
Christian Würdig committed
267
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
268
269
270
271
272
273
274
275
276
277
				const arch_register_t *in;

				in  = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
				out = out ? out : in1;

				snprintf(buf, SNPRINTF_BUF_LEN, "%s, %s", \
					arch_register_get_name(out), arch_register_get_name(in));
			}
			break;
		case ia32_AddrModeS:
278
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
279
280
281
			break;
		case ia32_AddrModeD:
			if (get_ia32_cnst(n)) {
282
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n, env), get_ia32_cnst(n));
Christian Würdig's avatar
Christian Würdig committed
283
284
			}
			else {
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
				const arch_register_t *in1 = get_in_reg(n, 2);
				const char *reg_name;
				ir_mode *mode = get_ia32_res_mode(n);

				mode = mode ? mode : get_ia32_ls_mode(n);

				switch(get_mode_size_bits(mode)) {
					case 8:
						reg_name = ia32_get_mapped_reg_name(env->isa->regs_8bit, in1);
						break;
					case 16:
						reg_name = ia32_get_mapped_reg_name(env->isa->regs_16bit, in1);
						break;
					case 32:
						reg_name = arch_register_get_name(in1);
						break;
					default:
						assert(0 && "unsupported mode size");
						break;
				}

				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n, env), reg_name);
Christian Würdig's avatar
Christian Würdig committed
307
308
309
310
311
312
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
313
314
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
315
316
317
318
319
320
	return buf;
}

/**
 * Emits registers and/or address mode of a unary operation.
 */
321
char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
322
323
324
325
326
327
328
329
330
331
332
333
334
335
	static char *buf = NULL;

	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
			break;
		case ia32_am_Dest:
336
			snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
337
338
339
340
341
342
343
344
345
			break;
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
346
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
347
 */
348
char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
	ia32_am_flavour_t am_flav    = get_ia32_am_flavour(n);
	int               had_output = 0;
	char             *s;
	int               size;
	static struct obstack *obst  = NULL;
	ir_mode *mode = get_ia32_ls_mode(n);

	if (! is_ia32_Lea(n))
		assert(mode && "AM node must have ls_mode attribute set.");

	if (! obst) {
		obst = xcalloc(1, sizeof(*obst));
	}
	else {
		obstack_free(obst, NULL);
	}

	/* obstack_free with NULL results in an uninitialized obstack */
	obstack_init(obst);

	if (mode) {
		switch (get_mode_size_bits(mode)) {
			case 8:
Christian Würdig's avatar
Christian Würdig committed
372
				obstack_printf(obst, "BYTE ");
Christian Würdig's avatar
Christian Würdig committed
373
374
				break;
			case 16:
Christian Würdig's avatar
Christian Würdig committed
375
				obstack_printf(obst, "WORD ");
Christian Würdig's avatar
Christian Würdig committed
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
				break;
			default:
				break;
		}
	}

	obstack_printf(obst, "[");

	if (am_flav & ia32_B) {
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}

		lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);

		if (am_flav & ia32_S) {
			obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
		}

		had_output = 1;
	}

	if (am_flav & ia32_O) {
		obstack_printf(obst, get_ia32_am_offs(n));
	}

	obstack_printf(obst, "] ");

	size        = obstack_object_size(obst);
	s           = obstack_finish(obst);
	s[size - 1] = '\0';

	return s;
}



Christian Würdig's avatar
Christian Würdig committed
418
419
420
421
422
423
424
425
426
/**
 * Formated print of commands and comments.
 */
static void ia32_fprintf_format(FILE *F, char *cmd_buf, char *cmnt_buf) {
	fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
}



Christian Würdig's avatar
Christian Würdig committed
427
/**
Christian Würdig's avatar
Christian Würdig committed
428
429
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
430
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
431
432
433
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
434
435
}

Christian Würdig's avatar
Christian Würdig committed
436

Christian Würdig's avatar
Christian Würdig committed
437

Christian Würdig's avatar
Christian Würdig committed
438
439
440
441
442
443
444
445
446
447
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
448
449
450
#undef IA32_DO_EMIT
#define IA32_DO_EMIT ia32_fprintf_format(F, cmd_buf, cmnt_buf)

451
452
453
454
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
455
456
	const char *name;
	pn_Cmp      num;
457
458
459
460
461
462
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
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
};

/*
 * positive conditions for signed compares
 */
static const struct cmp2conditon_t cmp2condition_s[] = {
  { NULL,              pn_Cmp_False },  /* always false */
  { "e",               pn_Cmp_Eq },     /* == */
  { "l",               pn_Cmp_Lt },     /* < */
  { "le",              pn_Cmp_Le },     /* <= */
  { "g",               pn_Cmp_Gt },     /* > */
  { "ge",              pn_Cmp_Ge },     /* >= */
  { "ne",              pn_Cmp_Lg },     /* != */
  { "ordered",         pn_Cmp_Leg },    /* Floating point: ordered */
  { "unordered",       pn_Cmp_Uo },     /* FLoting point: unordered */
  { "unordered or ==", pn_Cmp_Ue },     /* Floating point: unordered or == */
  { "unordered or <",  pn_Cmp_Ul },     /* Floating point: unordered or < */
  { "unordered or <=", pn_Cmp_Ule },    /* Floating point: unordered or <= */
  { "unordered or >",  pn_Cmp_Ug },     /* Floating point: unordered or > */
  { "unordered or >=", pn_Cmp_Uge },    /* Floating point: unordered or >= */
  { "unordered or !=", pn_Cmp_Ne },     /* Floating point: unordered or != */
  { NULL,              pn_Cmp_True },   /* always true */
};

/*
 * positive conditions for unsigned compares
 */
static const struct cmp2conditon_t cmp2condition_u[] = {
  { NULL,              pn_Cmp_False },  /* always false */
  { "e",               pn_Cmp_Eq },     /* == */
  { "b",               pn_Cmp_Lt },     /* < */
  { "be",              pn_Cmp_Le },     /* <= */
  { "a",               pn_Cmp_Gt },     /* > */
  { "ae",              pn_Cmp_Ge },     /* >= */
  { "ne",              pn_Cmp_Lg },     /* != */
  { "ordered",         pn_Cmp_Leg },    /* Floating point: ordered */
  { "unordered",       pn_Cmp_Uo },     /* FLoting point: unordered */
  { "unordered or ==", pn_Cmp_Ue },     /* Floating point: unordered or == */
  { "unordered or <",  pn_Cmp_Ul },     /* Floating point: unordered or < */
  { "unordered or <=", pn_Cmp_Ule },    /* Floating point: unordered or <= */
  { "unordered or >",  pn_Cmp_Ug },     /* Floating point: unordered or > */
  { "unordered or >=", pn_Cmp_Uge },    /* Floating point: unordered or >= */
  { "unordered or !=", pn_Cmp_Ne },     /* Floating point: unordered or != */
  { NULL,              pn_Cmp_True },   /* always true */
};

/*
 * returns the condition code
 */
Christian Würdig's avatar
Christian Würdig committed
506
static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
507
{
Christian Würdig's avatar
Christian Würdig committed
508
509
	assert(cmp2condition_s[cmp_code].num == cmp_code);
	assert(cmp2condition_u[cmp_code].num == cmp_code);
510

Christian Würdig's avatar
Christian Würdig committed
511
	return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
512
513
}

514
515
516
517
518
519
520
/**
 * Returns the target block for a control flow node.
 */
static ir_node *get_cfop_target_block(const ir_node *irn) {
	return get_irn_link(irn);
}

Christian Würdig's avatar
Christian Würdig committed
521
522
523
524
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
525
	ir_node *bl = get_cfop_target_block(irn);
526

Michael Beck's avatar
Michael Beck committed
527
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
528
529
	return buf;
}
530

Christian Würdig's avatar
Christian Würdig committed
531
532
533
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
534
535
536
static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
	const ir_node   *proj1, *proj2 = NULL;
	const ir_node   *block, *next_bl = NULL;
Christian Würdig's avatar
Christian Würdig committed
537
538
	const ir_edge_t *edge;
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
539
540
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
541

542
	/* get both Proj's */
Christian Würdig's avatar
Christian Würdig committed
543
	edge = get_irn_out_edge_first(irn);
544
545
	proj1 = get_edge_src_irn(edge);
	assert(is_Proj(proj1) && "CondJmp with a non-Proj");
Christian Würdig's avatar
Christian Würdig committed
546

547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
	edge = get_irn_out_edge_next(irn, edge);
	if (edge) {
		proj2 = get_edge_src_irn(edge);
		assert(is_Proj(proj2) && "CondJmp with a non-Proj");
  }

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
	if (proj2 && sched_is_scheduled(block)) {
		/* we have a block schedule */
		next_bl = sched_next(block);

		if (get_cfop_target_block(proj1) == next_bl) {
			/* exchange both proj's so the second one can be omitted */
			const ir_node *t = proj1;
			proj1 = proj2;
			proj2 = t;
		}
	}

	/* the first Proj must always be created */
	if (get_Proj_proj(proj1) == pn_Cond_true) {
Christian Würdig's avatar
Christian Würdig committed
569
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
Christian Würdig's avatar
Christian Würdig committed
570
					get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
571
					get_cfop_target(proj1, buf));
Christian Würdig's avatar
Christian Würdig committed
572
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; cmp(a, b) == TRUE");
Christian Würdig's avatar
Christian Würdig committed
573
574
	}
	else  {
575
576
577
578
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
					get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), mode),
					!mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
					get_cfop_target(proj1, buf));
Christian Würdig's avatar
Christian Würdig committed
579
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; cmp(a, b) == FALSE");
Christian Würdig's avatar
Christian Würdig committed
580
	}
Christian Würdig's avatar
Christian Würdig committed
581
582
	IA32_DO_EMIT;

583
584
585
586
587
588
589
590
591
592
	/* the second Proj might be a fallthrough */
	if (proj2) {
		if (get_cfop_target_block(proj2) != next_bl) {
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj2, buf));
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; otherwise");
		}
		else {
			cmd_buf[0] = '\0';
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; fallthrogh %s", get_cfop_target(proj2, buf));
		}
Christian Würdig's avatar
Christian Würdig committed
593
		IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
594
595
596
597
	}
}

/**
Christian Würdig's avatar
Christian Würdig committed
598
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
599
 */
600
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
601
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
602
603
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
604

605
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
606
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F", irn);
Christian Würdig's avatar
Christian Würdig committed
607
	IA32_DO_EMIT;
608
	finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
Christian Würdig's avatar
Christian Würdig committed
609
610
}

Christian Würdig's avatar
Christian Würdig committed
611
612
613
/**
 * Emits code for conditional jump with two variables.
 */
614
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
615
616
617
	CondJmp_emitter(irn, env);
}

Christian Würdig's avatar
Christian Würdig committed
618
619
620
/**
 * Emits code for conditional jump with immediate.
 */
621
void emit_ia32_CondJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
622
	CondJmp_emitter(irn, env);
Christian Würdig's avatar
Christian Würdig committed
623
624
}

625
626
627
628
629
630
631
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
	FILE *F = env->out;
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
632
633
634
635
636
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
  const char *op2 = get_ia32_cnst(irn);

  if (! op2)
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
637

Michael Beck's avatar
Michael Beck committed
638
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %s, %s ", op1, op2);
639
640
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F", irn);
	IA32_DO_EMIT;
641
	finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
}

/**
 * Emits code for conditional test and jump with two variables.
 */
static void emit_ia32_TestJmp(const ir_node *irn, ia32_emit_env_t *env) {
	TestJmp_emitter(irn, env);
}

/**
 * Emits code for conditional test and jump with immediate.
 */
static void emit_ia32_TestJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
	TestJmp_emitter(irn, env);
}
Christian Würdig's avatar
Christian Würdig committed
657
658
659
660
661
662
663
664
665
666
667
668
669

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

/* jump table entry (target and corresponding number) */
Christian Würdig's avatar
Christian Würdig committed
670
671
672
673
674
typedef struct _branch_t {
	ir_node *target;
	int      value;
} branch_t;

Christian Würdig's avatar
Christian Würdig committed
675
/* jump table for switch generation */
Christian Würdig's avatar
Christian Würdig committed
676
typedef struct _jmp_tbl_t {
Christian Würdig's avatar
Christian Würdig committed
677
678
679
680
681
682
	ir_node  *defProj;         /**< default target */
	int       min_value;       /**< smallest switch case */
	int       max_value;       /**< largest switch case */
	int       num_branches;    /**< number of jumps */
	char     *label;           /**< label of the jump table */
	branch_t *branches;        /**< jump array */
Christian Würdig's avatar
Christian Würdig committed
683
684
} jmp_tbl_t;

Christian Würdig's avatar
Christian Würdig committed
685
686
687
/**
 * Compare two variables of type branch_t. Used to sort all switch cases
 */
Christian Würdig's avatar
Christian Würdig committed
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
static int ia32_cmp_branch_t(const void *a, const void *b) {
	branch_t *b1 = (branch_t *)a;
	branch_t *b2 = (branch_t *)b;

	if (b1->value <= b2->value)
		return -1;
	else
		return 1;
}

/**
 * Emits code for a SwitchJmp (creates a jump table if
 * possible otherwise a cmp-jmp cascade). Port from
 * cggg ia32 backend
 */
703
void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
Christian Würdig's avatar
Christian Würdig committed
704
705
706
707
708
709
710
711
	unsigned long       interval;
	char                buf[SNPRINTF_BUF_LEN];
	int                 last_value, i, pn, do_jmp_tbl = 1;
	jmp_tbl_t           tbl;
	ir_node            *proj;
	const ir_edge_t    *edge;
	const lc_arg_env_t *env = ia32_get_arg_env();
	FILE               *F   = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
712
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
713
714

	/* fill the table structure */
715
	tbl.label        = xmalloc(SNPRINTF_BUF_LEN);
Christian Würdig's avatar
Christian Würdig committed
716
717
718
	tbl.label        = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
	tbl.defProj      = NULL;
	tbl.num_branches = get_irn_n_edges(irn);
719
	tbl.branches     = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
Christian Würdig's avatar
Christian Würdig committed
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
	tbl.min_value    = INT_MAX;
	tbl.max_value    = INT_MIN;

	i = 0;
	/* go over all proj's and collect them */
	foreach_out_edge(irn, edge) {
		proj = get_edge_src_irn(edge);
		assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");

		pn = get_Proj_proj(proj);

		/* create branch entry */
		tbl.branches[i].target = proj;
		tbl.branches[i].value  = pn;

		tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
		tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;

		/* check for default proj */
		if (pn == get_ia32_pncode(irn)) {
			assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
			tbl.defProj = proj;
		}

		i++;
	}

	/* sort the branches by their number */
Christian Würdig's avatar
Christian Würdig committed
748
	qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
Christian Würdig's avatar
Christian Würdig committed
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765

	/* two-complement's magic make this work without overflow */
	interval = tbl.max_value - tbl.min_value;

	/* check value interval */
	if (interval > 16 * 1024) {
		do_jmp_tbl = 0;
	}

	/* check ratio of value interval to number of branches */
	if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
		do_jmp_tbl = 0;
	}

	if (do_jmp_tbl) {
		/* emit the table */
		if (tbl.min_value != 0) {
Christian Würdig's avatar
Christian Würdig committed
766
			lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, -%d(%1S)",
Christian Würdig's avatar
Christian Würdig committed
767
				interval, tbl.min_value, irn);
Christian Würdig's avatar
Christian Würdig committed
768
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; first switch value is not 0");
Christian Würdig's avatar
Christian Würdig committed
769
770

			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
771
772
		}
		else {
Christian Würdig's avatar
Christian Würdig committed
773
			lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, %1S", interval, irn);
Christian Würdig's avatar
Christian Würdig committed
774
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; compare for switch");
Christian Würdig's avatar
Christian Würdig committed
775
776

			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
777
778
		}

Christian Würdig's avatar
Christian Würdig committed
779
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
Christian Würdig's avatar
Christian Würdig committed
780
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; default jump if out of range ");
Christian Würdig's avatar
Christian Würdig committed
781
		IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
782
783
784
785

		if (tbl.num_branches > 1) {
			/* create table */

Christian Würdig's avatar
Christian Würdig committed
786
			lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp [%1S*4+%s]", irn, tbl.label);
Christian Würdig's avatar
Christian Würdig committed
787
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; get jump table entry as target");
Christian Würdig's avatar
Christian Würdig committed
788
			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
789

Christian Würdig's avatar
Christian Würdig committed
790
			fprintf(F, "\t.section\t.rodata\n");
Christian Würdig's avatar
Christian Würdig committed
791
792
793
			fprintf(F, "\t.align 4\n");

			fprintf(F, "%s:\n", tbl.label);
Christian Würdig's avatar
Christian Würdig committed
794
795
796
797

			snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */\n",  tbl.branches[0].value);
			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
798
799
800
801

			last_value = tbl.branches[0].value;
			for (i = 1; i < tbl.num_branches; ++i) {
				while (++last_value < tbl.branches[i].value) {
Christian Würdig's avatar
Christian Würdig committed
802
					snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
Christian Würdig's avatar
Christian Würdig committed
803
					snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; default case");
Christian Würdig's avatar
Christian Würdig committed
804
					IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
805
				}
Christian Würdig's avatar
Christian Würdig committed
806
				snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf), last_value);
Christian Würdig's avatar
Christian Würdig committed
807
				snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; case %d", last_value);
Christian Würdig's avatar
Christian Würdig committed
808
				IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
809
810
			}

Christian Würdig's avatar
Christian Würdig committed
811
			fprintf(F, "\t.text");
Christian Würdig's avatar
Christian Würdig committed
812
813
814
		}
		else {
			/* one jump is enough */
Christian Würdig's avatar
Christian Würdig committed
815
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
Christian Würdig's avatar
Christian Würdig committed
816
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; only one case given");
Christian Würdig's avatar
Christian Würdig committed
817
			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
818
819
820
821
		}
	}
	else { // no jump table
		for (i = 0; i < tbl.num_branches; ++i) {
Christian Würdig's avatar
Christian Würdig committed
822
			lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %d, %1S", tbl.branches[i].value, irn);
Christian Würdig's avatar
Christian Würdig committed
823
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; case %d", i);
Christian Würdig's avatar
Christian Würdig committed
824
			IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
825
826
827
			fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
		}

Christian Würdig's avatar
Christian Würdig committed
828
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.defProj, buf));
Christian Würdig's avatar
Christian Würdig committed
829
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; default case");
Christian Würdig's avatar
Christian Würdig committed
830
		IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
831
832
	}

Christian Würdig's avatar
Christian Würdig committed
833
834
	if (tbl.label)
		free(tbl.label);
Christian Würdig's avatar
Christian Würdig committed
835
836
837
838
839
840
841
	if (tbl.branches)
		free(tbl.branches);
}

/**
 * Emits code for a unconditional jump.
 */
842
void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
843
	ir_node *block, *next_bl = NULL;
Christian Würdig's avatar
Christian Würdig committed
844
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
845
	char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
846

847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
	if (sched_is_scheduled(block)) {
		/* we have a block schedule */
		next_bl = sched_next(block);
	}

	if (get_cfop_target_block(irn) != next_bl) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F(%+F)", irn, get_cfop_target_block(irn));
	}
	else {
		cmd_buf[0] = '\0';
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; fallthrough %s", get_cfop_target(irn, buf));
	}
Christian Würdig's avatar
Christian Würdig committed
862
	IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
863
864
}

Christian Würdig's avatar
Christian Würdig committed
865
866
867
868
869
870
871
872
873
874
875
876
877


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

Christian Würdig's avatar
Christian Würdig committed
878
879
880
/**
 * Emits code for a proj -> node
 */
881
void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
882
883
	ir_node *pred = get_Proj_pred(irn);

Christian Würdig's avatar
Christian Würdig committed
884
	if (get_irn_op(pred) == op_Start) {
Christian Würdig's avatar
Christian Würdig committed
885
886
887
888
889
890
891
892
893
894
		switch(get_Proj_proj(irn)) {
			case pn_Start_X_initial_exec:
				emit_Jmp(irn, env);
				break;
			default:
				break;
		}
	}
}

895
896
897
898
899
900
901
902
903
904
905
/**********************************
 *   _____                  ____
 *  / ____|                |  _ \
 * | |     ___  _ __  _   _| |_) |
 * | |    / _ \| '_ \| | | |  _ <
 * | |___| (_) | |_) | |_| | |_) |
 *  \_____\___/| .__/ \__, |____/
 *             | |     __/ |
 *             |_|    |___/
 **********************************/

906
907
908
/**
 * Emit movsb/w instructions to make mov count divideable by 4
 */
909
static void emit_CopyB_prolog(FILE *F, int rem, int size) {
Christian Würdig's avatar
Christian Würdig committed
910
911
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];

912
	fprintf(F, "\t/* memcopy %d bytes*/\n", size);
Christian Würdig's avatar
Christian Würdig committed
913
914
915
916

	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
	IA32_DO_EMIT;
917
918
919

	switch(rem) {
		case 1:
Christian Würdig's avatar
Christian Würdig committed
920
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
Christian Würdig's avatar
Christian Würdig committed
921
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy remainder 1");
922
923
			break;
		case 2:
Christian Würdig's avatar
Christian Würdig committed
924
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
Christian Würdig's avatar
Christian Würdig committed
925
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy remainder 2");
926
927
			break;
		case 3:
Christian Würdig's avatar
Christian Würdig committed
928
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
Christian Würdig's avatar
Christian Würdig committed
929
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy remainder 3");
Christian Würdig's avatar
Christian Würdig committed
930
931
			IA32_DO_EMIT;
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
Christian Würdig's avatar
Christian Würdig committed
932
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy remainder 3");
933
934
			break;
	}
Christian Würdig's avatar
Christian Würdig committed
935
936

	IA32_DO_EMIT;
937
938
}

939
940
941
/**
 * Emit rep movsd instruction for memcopy.
 */
942
void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
943
944
945
946
	FILE   *F    = emit_env->out;
	tarval *tv   = get_ia32_Immop_tarval(irn);
	int     rem  = get_tarval_long(tv);
	int     size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
Christian Würdig's avatar
Christian Würdig committed
947
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
948
949
950

	emit_CopyB_prolog(F, rem, size);

Christian Würdig's avatar
Christian Würdig committed
951
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
Christian Würdig's avatar
Christian Würdig committed
952
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy");
Christian Würdig's avatar
Christian Würdig committed
953
	IA32_DO_EMIT;
954
955
}

956
957
958
/**
 * Emits unrolled memcopy.
 */
959
void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
960
961
962
	tarval *tv   = get_ia32_Immop_tarval(irn);
	int     size = get_tarval_long(tv);
	FILE   *F    = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
963
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
964
965
966
967
968

	emit_CopyB_prolog(F, size & 0x3, size);

	size >>= 2;
	while (size--) {
Christian Würdig's avatar
Christian Würdig committed
969
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
Christian Würdig's avatar
Christian Würdig committed
970
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "; memcopy unrolled");
Christian Würdig's avatar
Christian Würdig committed
971
		IA32_DO_EMIT;
972
973
974
	}
}

Christian Würdig's avatar
Christian Würdig committed
975
976


977
978
979
980
981
982
983
984
985
986
987
988
989
/***************************
 *   _____
 *  / ____|
 * | |     ___  _ ____   __
 * | |    / _ \| '_ \ \ / /
 * | |___| (_) | | | \ V /
 *  \_____\___/|_| |_|\_/
 *
 ***************************/

/**
 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
 */
990
static void emit_ia32_Conv(const ir_node *irn, ia32_emit_env_t *emit_env) {
991
992
993
994
	FILE               *F    = emit_env->out;
	const lc_arg_env_t *env  = ia32_get_arg_env();
	char               *from, *to, buf[64];
	ir_mode *src_mode, *tgt_mode;
Christian Würdig's avatar
Christian Würdig committed
995
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007

	src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
	tgt_mode = get_ia32_res_mode(irn);

	from = mode_is_float(src_mode) ? (get_mode_size_bits(src_mode) == 32 ? "ss" : "sd") : "si";
	to   = mode_is_float(tgt_mode) ? (get_mode_size_bits(tgt_mode) == 32 ? "ss" : "sd") : "si";

	switch(get_ia32_op_type(irn)) {
		case ia32_Normal:
			lc_esnprintf(env, buf, sizeof(buf), "%1D, %3S", irn, irn);
			break;
		case ia32_AddrModeS:
1008
			lc_esnprintf(env, buf, sizeof(buf), "%1D, %s", irn, ia32_emit_am(irn, emit_env));
1009
1010
1011
1012
1013
			break;
		default:
			assert(0 && "unsupported op type for Conv");
	}

Christian Würdig's avatar
Christian Würdig committed
1014
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cvt%s2%s %s", from, to, buf);
Christian Würdig's avatar
Christian Würdig committed
1015
	lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "; %+F(%+F, %+F)", irn, src_mode, tgt_mode);
Christian Würdig's avatar
Christian Würdig committed
1016
	IA32_DO_EMIT;
1017
1018
}

1019
void emit_ia32_Conv_I2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1020
1021
1022
	emit_ia32_Conv(irn, emit_env);
}

1023
void emit_ia32_Conv_FP2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1024
1025
1026
	emit_ia32_Conv(irn, emit_env);
}

1027
void emit_ia32_Conv_FP2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1028
1029
1030
1031
1032
	emit_ia32_Conv(irn, emit_env);
}



Christian Würdig's avatar
Christian Würdig committed
1033
1034
1035
1036
1037
1038
1039
/*******************************************
 *  _                          _
 * | |                        | |
 * | |__   ___ _ __   ___   __| | ___  ___
 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
 * | |_) |  __/ | | | (_) | (_| |  __/\__ \
 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
Christian Würdig's avatar
Christian Würdig committed
1040
 *
Christian Würdig's avatar
Christian Würdig committed
1041
1042
 *******************************************/

1043
1044
1045
/**
 * Emits a backend call
 */
1046
void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
Christian Würdig's avatar
Christian Würdig committed
1047
	FILE *F = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
1048
	entity *ent = be_Call_get_entity(irn);
Christian Würdig's avatar
Christian Würdig committed
1049
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1050
1051

	if (ent) {
Christian Würdig's avatar
Christian Würdig committed
1052
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "call %s", get_entity_name(ent));
Christian Würdig's avatar
Christian Würdig committed
1053
1054
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
1055
		lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "%1D", get_irn_n(irn, be_pos_Call_ptr));
Christian Würdig's avatar
Christian Würdig committed
1056
	}
Christian Würdig's avatar
Christian Würdig committed
1057

Christian Würdig's avatar
Christian Würdig committed
1058
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F (be_Call)", irn);
Christian Würdig's avatar
Christian Würdig committed
1059
1060

	IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
1061
1062
}

1063
1064
1065
/**
 * Emits code to increase stack pointer.
 */
1066
void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
Christian Würdig's avatar
Christian Würdig committed
1067
1068
1069
	FILE          *F    = emit_env->out;
	unsigned       offs = be_get_IncSP_offset(irn);
	be_stack_dir_t dir  = be_get_IncSP_direction(irn);
Christian Würdig's avatar
Christian Würdig committed
1070
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1071
1072

	if (offs) {
Christian Würdig's avatar
Christian Würdig committed
1073
1074
		lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S,%s%u", irn,
			(dir == be_stack_dir_along) ? " -" : " ", offs);
Christian Würdig's avatar
Christian Würdig committed
1075
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F (IncSP)", irn);
Christian Würdig's avatar
Christian Würdig committed
1076
1077
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
1078
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
Christian Würdig's avatar
Christian Würdig committed
1079
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; omitted %+F (IncSP) with 0", irn);
Christian Würdig's avatar
Christian Würdig committed
1080
	}
Christian Würdig's avatar
Christian Würdig committed
1081
1082

	IA32_DO_EMIT;
Christian Würdig's avatar
Christian Würdig committed
1083
1084
}

1085
1086
1087
/**
 * Emits code to set stack pointer.
 */
1088
void emit_be_SetSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1089
	FILE *F = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
1090
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1091

Christian Würdig's avatar
Christian Würdig committed
1092
	lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
Christian Würdig's avatar
Christian Würdig committed
1093
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F (restore SP)", irn);
Christian Würdig's avatar
Christian Würdig committed
1094
	IA32_DO_EMIT;
1095
1096
}

1097
1098
1099
/**
 * Emits code for Copy.
 */
1100
void emit_be_Copy(const ir_node *irn, ia32_emit_env_t *emit_env) {
1101
	FILE *F = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
1102
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1103

Christian Würdig's avatar
Christian Würdig committed
1104
	lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %1S", irn, irn);
Christian Würdig's avatar
Christian Würdig committed
1105
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F", irn);
Christian Würdig's avatar
Christian Würdig committed
1106
	IA32_DO_EMIT;
1107
1108
}

1109
1110
1111
/**
 * Emits code for exchange.
 */
1112
void emit_be_Perm(const ir_node *irn, ia32_emit_env_t *emit_env) {
1113
	FILE *F = emit_env->out;
Christian Würdig's avatar
Christian Würdig committed
1114
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1115

Christian Würdig's avatar
Christian Würdig committed
1116
	lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "xchg %1S, %2S", irn, irn);
Christian Würdig's avatar
Christian Würdig committed
1117
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "; %+F(%1A, %2A)", irn, irn, irn);
Christian Würdig's avatar
Christian Würdig committed
1118
	IA32_DO_EMIT;
1119
}
Christian Würdig's avatar
Christian Würdig committed
1120

Christian Würdig's avatar
Christian Würdig committed
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
/***********************************************************************************
 *                  _          __                                             _
 *                 (_)        / _|                                           | |
 *  _ __ ___   __ _ _ _ __   | |_ _ __ __ _ _ __ ___   _____      _____  _ __| | __
 * | '_ ` _ \ / _` | | '_ \  |  _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
 * | | | | | | (_| | | | | | | | | | | (_| | | | | | |  __/\ V  V / (_) | |  |   <
 * |_| |_| |_|\__,_|_|_| |_| |_| |_|  \__,_|_| |_| |_|\___| \_/\_/ \___/|_|  |_|\_\
 *
 ***********************************************************************************/

Christian Würdig's avatar
Christian Würdig committed
1131
/**
1132
1133
 * Enters the emitter functions for handled nodes into the generic
 * pointer of an opcode.
Christian Würdig's avatar
Christian Würdig committed
1134
 */
Christian Würdig's avatar
Christian Würdig committed
1135
static void ia32_register_emitters(void) {
Christian Würdig's avatar
Christian Würdig committed
1136

1137
1138
#define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
#define EMIT(a)      op_##a->ops.generic = (op_func)emit_##a
Christian Würdig's avatar
Christian Würdig committed
1139
#define BE_EMIT(a)   op_be_##a->ops.generic = (op_func)emit_be_##a
Christian Würdig's avatar
Christian Würdig committed
1140

1141
1142
1143
	/* first clear the generic function pointer for all ops */
	clear_irp_opcodes_generic_func();

Christian Würdig's avatar
Christian Würdig committed
1144
1145
	/* register all emitter functions defined in spec */
	ia32_register_spec_emitters();
1146

Christian Würdig's avatar
Christian Würdig committed
1147
	/* other ia32 emitter functions */
1148
	IA32_EMIT(CondJmp);
1149
	IA32_EMIT(TestJmp);
1150
	IA32_EMIT(SwitchJmp);
Christian Würdig's avatar
Christian Würdig committed
1151
1152
	IA32_EMIT(CopyB);
	IA32_EMIT(CopyB_i);
1153
1154
1155
	IA32_EMIT(Conv_I2FP);
	IA32_EMIT(Conv_FP2I);
	IA32_EMIT(Conv_FP2FP);
Christian Würdig's avatar
Christian Würdig committed
1156
1157
1158
1159

	/* benode emitter */
	BE_EMIT(Call);
	BE_EMIT(IncSP);
1160
1161
1162
	BE_EMIT(SetSP);
	BE_EMIT(Copy);
	BE_EMIT(Perm);
1163

Christian Würdig's avatar
Christian Würdig committed
1164
	/* firm emitter */
1165
1166
	EMIT(Jmp);
	EMIT(Proj);
1167
1168

#undef IA32_EMIT