ia32_emitter.c 43.6 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"
Christian Würdig's avatar
Christian Würdig committed
29
#include "gen_ia32_regalloc_if.h"
30
31
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
Christian Würdig's avatar
Christian Würdig committed
32
33
#include "ia32_map_regs.h"

34
#define BLOCK_PREFIX(x) ".L" x
Michael Beck's avatar
Michael Beck committed
35

Christian Würdig's avatar
Christian Würdig committed
36
37
#define SNPRINTF_BUF_LEN 128

38
/* global arch_env for lc_printf functions */
Christian Würdig's avatar
Christian Würdig committed
39
static const arch_env_t *arch_env = NULL;
40

Christian Würdig's avatar
Christian Würdig committed
41
42
43
44
45
46
47
48
49
50
51
/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

52
53
54
/**
 * returns true if a node has x87 registers
 */
55
56
static int has_x87_register(const ir_node *n) {
	return is_irn_machine_user(n, 0);
57
58
}

Christian Würdig's avatar
Christian Würdig committed
59
60
61
/* 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;
62
63
}

Christian Würdig's avatar
Christian Würdig committed
64
65

/**
Christian Würdig's avatar
Christian Würdig committed
66
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
67
 */
Christian Würdig's avatar
Christian Würdig committed
68
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
69
70
71
72
73
74
75
76
77
	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
78
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
79

Christian Würdig's avatar
Christian Würdig committed
80
	assert(reg && "no in register found");
81
82
83
84
85
86
87
88
89
90
91

	/* in case of unknown: just return a register */
	if (REGS_ARE_EQUAL(reg, &ia32_gp_regs[REG_GP_UKNWN]))
		reg = &ia32_gp_regs[REG_EAX];
	else if (REGS_ARE_EQUAL(reg, &ia32_xmm_regs[REG_XMM_UKNWN]))
		reg = &ia32_xmm_regs[REG_XMM0];
	else if (REGS_ARE_EQUAL(reg, &ia32_vfp_regs[REG_VFP_UKNWN]))
		reg = &ia32_vfp_regs[REG_VF0];
	else if (REGS_ARE_EQUAL(reg, &ia32_st_regs[REG_ST_UKNWN]))
		reg = &ia32_st_regs[REG_ST0];

Christian Würdig's avatar
Christian Würdig committed
92
93
94
95
96
97
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
98
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
	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
127
128
129
	return reg;
}

Michael Beck's avatar
Michael Beck committed
130
131
132
133
134
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
135
136
137
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
138
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
139
140
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
141
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
142
		reg = get_in_reg(irn, pos);
143
144
145
146
147
148

		if (reg->reg_class == &ia32_reg_classes[CLASS_ia32_vfp]) {
			/* FIXME: works for binop only */
			assert(2 <= pos && pos <= 3);
			reg = get_ia32_attr(irn)->x87[pos - 2];
		}
Christian Würdig's avatar
Christian Würdig committed
149
150
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
151
		/* destination address mode nodes don't have outputs */
152
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
153
154
155
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
156
		reg = get_out_reg(irn, pos);
157
158
		if (reg->reg_class == &ia32_reg_classes[CLASS_ia32_vfp])
			reg = get_ia32_attr(irn)->x87[pos + 2];
Christian Würdig's avatar
Christian Würdig committed
159
	}
160
	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
161
162
163
164
165
166
167
168
169
170
171
172
173
}

/**
 * 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)
Christian Würdig's avatar
Christian Würdig committed
174
		return lc_appendable_snadd(app, "(null)", 6);
Christian Würdig's avatar
Christian Würdig committed
175

176
	buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
177

178
179
	/* append the stupid % to register names */
	lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
180
	return lc_appendable_snadd(app, buf, strlen(buf));
181
182
}

Michael Beck's avatar
Michael Beck committed
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
/**
 * Get the x87 register name for a node.
 */
static int ia32_get_x87_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;
	ia32_attr_t *attr;

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

	attr = get_ia32_attr(X);
	buf = attr->x87[nr]->name;
199
	lc_appendable_chadd(app, '%');
Michael Beck's avatar
Michael Beck committed
200
201
202
	return lc_appendable_snadd(app, buf, strlen(buf));
}

Christian Würdig's avatar
Christian Würdig committed
203
/**
204
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
205
206
207
208
209
210
211
212
213
214
 */
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);

215
	if (occ->conversion == 'C') {
Christian Würdig's avatar
Christian Würdig committed
216
		buf = get_ia32_cnst(X);
Christian Würdig's avatar
Christian Würdig committed
217
	}
218
	else { /* 'O' */
Christian Würdig's avatar
Christian Würdig committed
219
		buf = get_ia32_am_offs(X);
Christian Würdig's avatar
Christian Würdig committed
220
221
	}

Christian Würdig's avatar
Christian Würdig committed
222
	return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
223
224
225
226
227
228
229
230
}

/**
 * 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
231
	ir_node *X    = arg->v_ptr;
232
233
234
235
236
	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
237
238
239
240

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

Christian Würdig's avatar
Christian Würdig committed
241
242
243
244
245
246
	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
247
248
249
250
251
252
253
}

/**
 * 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
254
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
255

Christian Würdig's avatar
Christian Würdig committed
256
257
258
	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 };
Michael Beck's avatar
Michael Beck committed
259
	static const lc_arg_handler_t ia32_x87_handler   = { ia32_get_arg_type, ia32_get_x87_name };
Christian Würdig's avatar
Christian Würdig committed
260

Christian Würdig's avatar
Christian Würdig committed
261
262
263
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
264

265
266
267
268
269
		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);
Michael Beck's avatar
Michael Beck committed
270
		lc_arg_register(env, "ia32:x87",  'X', &ia32_x87_handler);
Christian Würdig's avatar
Christian Würdig committed
271
	}
Christian Würdig's avatar
Christian Würdig committed
272

Christian Würdig's avatar
Christian Würdig committed
273
	return env;
Christian Würdig's avatar
Christian Würdig committed
274
275
}

Christian Würdig's avatar
Christian Würdig committed
276
277
278
279
280
281
282
static char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
	switch(get_mode_size_bits(mode)) {
		case 8:
			return ia32_get_mapped_reg_name(env->isa->regs_8bit, reg);
		case 16:
			return ia32_get_mapped_reg_name(env->isa->regs_16bit, reg);
		default:
Christian Würdig's avatar
Christian Würdig committed
283
			return (char *)arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
284
285
286
	}
}

Christian Würdig's avatar
Christian Würdig committed
287
288
289
/**
 * Emits registers and/or address mode of a binary operation.
 */
290
char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
291
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
292

Christian Würdig's avatar
Christian Würdig committed
293
	/* verify that this function is never called on non-AM supporting operations */
Christian Würdig's avatar
Christian Würdig committed
294
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
Christian Würdig's avatar
Christian Würdig committed
295

296
297
298
299
300
301
#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
302

Christian Würdig's avatar
Christian Würdig committed
303
304
305
306
307
308
309
310
311
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
312
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
Christian Würdig's avatar
Christian Würdig committed
313
314
315
316
317
				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
318
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
319
				const arch_register_t *in;
Christian Würdig's avatar
Christian Würdig committed
320
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
321

Christian Würdig's avatar
Christian Würdig committed
322
323
324
				in      = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
				out     = out ? out : in1;
				in_name = arch_register_get_name(in);
Christian Würdig's avatar
Christian Würdig committed
325

Christian Würdig's avatar
Christian Würdig committed
326
327
328
329
330
331
				if (is_ia32_emit_cl(n)) {
					assert(REGS_ARE_EQUAL(&ia32_gp_regs[REG_ECX], in) && "shift operation needs ecx");
					in_name = "cl";
				}

				snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", arch_register_get_name(out), in_name);
Christian Würdig's avatar
Christian Würdig committed
332
333
334
			}
			break;
		case ia32_AddrModeS:
335
336
337
338
339
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
				assert(! PRODUCES_RESULT(n) && "Source AM with Const must not produce result");
				snprintf(buf, SNPRINTF_BUF_LEN, "%s, %s", get_ia32_cnst(n), ia32_emit_am(n, env));
			}
			else {
340
341
342
343
344
345
				if (PRODUCES_RESULT(n)) {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %s", n, ia32_emit_am(n, env));
				}
				else {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n, env));
				}
346
			}
Christian Würdig's avatar
Christian Würdig committed
347
348
			break;
		case ia32_AddrModeD:
349
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
350
351
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
					ia32_emit_am(n, env),
352
353
					is_ia32_ImmSymConst(n) ? " OFFSET FLAT:" : " ",  /* In case of a symconst we must add OFFSET to */
					get_ia32_cnst(n));                               /* tell the assembler to store it's address.   */
Christian Würdig's avatar
Christian Würdig committed
354
355
			}
			else {
356
				const arch_register_t *in1 = get_in_reg(n, 2);
Christian Würdig's avatar
Christian Würdig committed
357
				ir_mode              *mode = get_ia32_res_mode(n);
Christian Würdig's avatar
Christian Würdig committed
358
359
360
361
362
363
364
365
366
				const char           *in_name;

				mode    = mode ? mode : get_ia32_ls_mode(n);
				in_name = ia32_get_reg_name_for_mode(env, mode, in1);

				if (is_ia32_emit_cl(n)) {
					assert(REGS_ARE_EQUAL(&ia32_gp_regs[REG_ECX], in1) && "shift operation needs ecx");
					in_name = "cl";
				}
367

Christian Würdig's avatar
Christian Würdig committed
368
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %%%s", ia32_emit_am(n, env), in_name);
Christian Würdig's avatar
Christian Würdig committed
369
370
371
372
373
374
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
375
376
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
377
378
379
	return buf;
}

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
/**
 * Emits registers and/or address mode of a binary operation.
 */
char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
	static char *buf = NULL;

	/* verify that this function is never called on non-AM supporting operations */
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");

	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 (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
			else {
				ia32_attr_t *attr = get_ia32_attr(n);
				const arch_register_t *in1 = attr->x87[0];
				const arch_register_t *in2 = attr->x87[1];
				const arch_register_t *out = attr->x87[2];
				const arch_register_t *in;
				const char            *in_name;

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

				snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", arch_register_get_name(out), in_name);
			}
			break;
		case ia32_AddrModeS:
		case ia32_AddrModeD:
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
			break;
		default:
			assert(0 && "unsupported op type");
	}

#undef PRODUCES_RESULT

	return buf;
}

Christian Würdig's avatar
Christian Würdig committed
429
430
431
/**
 * Emits registers and/or address mode of a unary operation.
 */
432
char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
433
434
435
436
437
438
439
440
441
442
443
	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:
444
445
446
447
448
449
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%C", n);
			}
			else {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
			}
Christian Würdig's avatar
Christian Würdig committed
450
451
			break;
		case ia32_am_Dest:
452
			snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
453
454
455
456
457
458
459
460
461
			break;
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
462
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
463
 */
464
char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
	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
488
				obstack_printf(obst, "BYTE PTR ");
Christian Würdig's avatar
Christian Würdig committed
489
490
				break;
			case 16:
Christian Würdig's avatar
Christian Würdig committed
491
492
493
494
				obstack_printf(obst, "WORD PTR ");
				break;
			case 32:
				obstack_printf(obst, "DWORD PTR ");
Christian Würdig's avatar
Christian Würdig committed
495
				break;
496
497
			case 64:
				if (has_x87_register(n))
498
					/* ARGHHH: stupid gas x87 wants QWORD PTR but SSE must be WITHOUT */
499
500
501
502
503
504
					obstack_printf(obst, "QWORD PTR ");
				break;
			case 80:
			case 96:
				obstack_printf(obst, "XWORD PTR ");
				break;
Christian Würdig's avatar
Christian Würdig committed
505
506
507
508
509
			default:
				break;
		}
	}

510
511
512
513
514
515
	/* emit address mode symconst */
	if (get_ia32_am_sc(n)) {
		if (is_ia32_am_sc_sign(n))
			obstack_printf(obst, "-");
		obstack_printf(obst, "%s", get_id_str(get_ia32_am_sc(n)));
	}
Christian Würdig's avatar
Christian Würdig committed
516
517

	if (am_flav & ia32_B) {
518
		obstack_printf(obst, "[");
Christian Würdig's avatar
Christian Würdig committed
519
520
521
522
523
524
525
526
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}
527
528
529
		else {
			obstack_printf(obst, "[");
		}
Christian Würdig's avatar
Christian Würdig committed
530
531
532
533
534
535
536
537
538
539
540

		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) {
541
542
		s = get_ia32_am_offs(n);

543
544
545
546
547
548
549
		if (s) {
			/* omit explicit + if there was no base or index */
			if (! had_output) {
				obstack_printf(obst, "[");
				if (s[0] == '+')
					s++;
			}
550

551
552
553
			obstack_printf(obst, s);
			had_output = 1;
		}
Christian Würdig's avatar
Christian Würdig committed
554
555
	}

556
557
	if (had_output)
		obstack_printf(obst, "] ");
Christian Würdig's avatar
Christian Würdig committed
558
559
560
561
562
563
564
565
566
567

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

	return s;
}



Christian Würdig's avatar
Christian Würdig committed
568
569
570
/**
 * Formated print of commands and comments.
 */
Christian Würdig's avatar
Christian Würdig committed
571
572
573
574
575
576
577
578
static void ia32_fprintf_format(FILE *F, const ir_node *irn, char *cmd_buf, char *cmnt_buf) {
	unsigned lineno;
	const char *name = irn ? be_retrieve_dbg_info(get_irn_dbg_info((ir_node *)irn), &lineno) : NULL;

	if (name)
		fprintf(F, "\t%-35s %-60s /* %s:%u */\n", cmd_buf, cmnt_buf, name, lineno);
	else
		fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
Christian Würdig's avatar
Christian Würdig committed
579
580
581
582
}



Christian Würdig's avatar
Christian Würdig committed
583
/**
Christian Würdig's avatar
Christian Würdig committed
584
585
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
586
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
587
588
589
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
590
591
}

Christian Würdig's avatar
Christian Würdig committed
592

Christian Würdig's avatar
Christian Würdig committed
593

Christian Würdig's avatar
Christian Würdig committed
594
595
596
597
598
599
600
601
602
603
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
604
#undef IA32_DO_EMIT
Christian Würdig's avatar
Christian Würdig committed
605
#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
Christian Würdig's avatar
Christian Würdig committed
606

607
608
609
610
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
611
612
	const char *name;
	pn_Cmp      num;
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
};

/*
 * 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[] = {
Christian Würdig's avatar
Christian Würdig committed
641
642
643
	{ NULL,              pn_Cmp_False },  /* always false */
	{ "e",               pn_Cmp_Eq },     /* == */
	{ "b",               pn_Cmp_Lt },     /* < */
Christian Würdig's avatar
Christian Würdig committed
644
	{ "be",              pn_Cmp_Le },     /* <= */
Christian Würdig's avatar
Christian Würdig committed
645
646
647
648
649
650
651
652
653
654
655
656
	{ "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 */
657
658
659
660
661
};

/*
 * returns the condition code
 */
Christian Würdig's avatar
Christian Würdig committed
662
static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
663
{
Christian Würdig's avatar
Christian Würdig committed
664
665
	assert(cmp2condition_s[cmp_code].num == cmp_code);
	assert(cmp2condition_u[cmp_code].num == cmp_code);
666

Christian Würdig's avatar
Christian Würdig committed
667
	return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
668
669
}

670
671
672
673
674
675
676
/**
 * 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
677
678
679
680
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
681
	ir_node *bl = get_cfop_target_block(irn);
682

Michael Beck's avatar
Michael Beck committed
683
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
684
685
	return buf;
}
686

687
688
/** Return the next block in Block schedule */
static ir_node *next_blk_sched(const ir_node *block) {
Michael Beck's avatar
Michael Beck committed
689
	return get_irn_link(block);
690
691
}

Christian Würdig's avatar
Christian Würdig committed
692
693
694
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
695
696
697
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
698
699
	const ir_edge_t *edge;
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
700
701
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
702

703
	/* get both Proj's */
Christian Würdig's avatar
Christian Würdig committed
704
	edge = get_irn_out_edge_first(irn);
705
706
	proj1 = get_edge_src_irn(edge);
	assert(is_Proj(proj1) && "CondJmp with a non-Proj");
Christian Würdig's avatar
Christian Würdig committed
707

708
709
710
711
	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");
Christian Würdig's avatar
Christian Würdig committed
712
	}
713
714
715

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
716
	if (proj2) {
717
		/* we have a block schedule */
718
		next_bl = next_blk_sched(block);
719
720
721
722
723
724
725
726
727
728
729

		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
730
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
Christian Würdig's avatar
Christian Würdig committed
731
					get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
732
					get_cfop_target(proj1, buf));
Christian Würdig's avatar
Christian Würdig committed
733
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == TRUE */");
Christian Würdig's avatar
Christian Würdig committed
734
735
	}
	else  {
736
737
738
739
		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
740
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == FALSE */");
Christian Würdig's avatar
Christian Würdig committed
741
	}
Christian Würdig's avatar
Christian Würdig committed
742
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
743

744
745
746
747
	/* 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));
Christian Würdig's avatar
Christian Würdig committed
748
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
749
750
751
		}
		else {
			cmd_buf[0] = '\0';
Christian Würdig's avatar
Christian Würdig committed
752
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrogh %s */", get_cfop_target(proj2, buf));
753
		}
Christian Würdig's avatar
Christian Würdig committed
754
		IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
755
756
757
758
	}
}

/**
Christian Würdig's avatar
Christian Würdig committed
759
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
760
 */
761
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
762
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
763
764
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
765

766
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
767
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
768
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
769
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
Christian Würdig's avatar
Christian Würdig committed
770
771
}

Christian Würdig's avatar
Christian Würdig committed
772
773
774
/**
 * Emits code for conditional jump with two variables.
 */
775
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
776
777
778
	CondJmp_emitter(irn, env);
}

779
780
781
782
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
783
784
785

#define IA32_IS_IMMOP (is_ia32_ImmConst(irn) || is_ia32_ImmSymConst(irn))

Christian Würdig's avatar
Christian Würdig committed
786
	FILE       *F   = env->out;
Michael Beck's avatar
Michael Beck committed
787
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
788
	const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
Christian Würdig's avatar
Christian Würdig committed
789
790
	char        cmd_buf[SNPRINTF_BUF_LEN];
	char        cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
791

Christian Würdig's avatar
Christian Würdig committed
792
	if (! op2)
Michael Beck's avatar
Michael Beck committed
793
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
794

795
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
Christian Würdig's avatar
Christian Würdig committed
796
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
797

Christian Würdig's avatar
Christian Würdig committed
798
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
799
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
800
801

#undef IA32_IS_IMMOP
802
803
804
805
806
807
808
809
810
}

/**
 * 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);
}

811
812
813
814
815
816
static void emit_ia32_CJmp(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];

	snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
Christian Würdig's avatar
Christian Würdig committed
817
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
Christian Würdig's avatar
Christian Würdig committed
818
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
819
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
820
}
821

822
823
824
825
826
827
828
static void emit_ia32_CJmpAM(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];

	snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
Christian Würdig's avatar
Christian Würdig committed
829
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
830
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
831
}
Christian Würdig's avatar
Christian Würdig committed
832
833
834
835
836
837
838
839
840
841
842
843
844

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

/* jump table entry (target and corresponding number) */
Christian Würdig's avatar
Christian Würdig committed
845
846
847
848
849
typedef struct _branch_t {
	ir_node *target;
	int      value;
} branch_t;

Christian Würdig's avatar
Christian Würdig committed
850
/* jump table for switch generation */
Christian Würdig's avatar
Christian Würdig committed
851
typedef struct _jmp_tbl_t {
Christian Würdig's avatar
Christian Würdig committed
852
853
854
855
856
857
	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
858
859
} jmp_tbl_t;

Christian Würdig's avatar
Christian Würdig committed
860
861
862
/**
 * Compare two variables of type branch_t. Used to sort all switch cases
 */
Christian Würdig's avatar
Christian Würdig committed
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
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
 */
Michael Beck's avatar
Michael Beck committed
878
static void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
Christian Würdig's avatar
Christian Würdig committed
879
880
	unsigned long       interval;
	char                buf[SNPRINTF_BUF_LEN];
881
	int                 last_value, i, pn;
Christian Würdig's avatar
Christian Würdig committed
882
883
884
885
886
	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
887
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
888
889

	/* fill the table structure */
890
	tbl.label        = xmalloc(SNPRINTF_BUF_LEN);
Christian Würdig's avatar
Christian Würdig committed
891
892
893
	tbl.label        = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
	tbl.defProj      = NULL;
	tbl.num_branches = get_irn_n_edges(irn);
894
	tbl.branches     = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
Christian Würdig's avatar
Christian Würdig committed
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
	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
923
	qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
Christian Würdig's avatar
Christian Würdig committed
924
925
926
927

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

928
	/* emit the table */
Christian Würdig's avatar
Christian Würdig committed
929
930
931
	lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %u", irn, interval);
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* compare for switch */");
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
932

933
934
935
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default jump if out of range  */");
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
936

937
938
	if (tbl.num_branches > 1) {
		/* create table */
Christian Würdig's avatar
Christian Würdig committed
939

940
941
		lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp %s[%1S*4]", tbl.label, irn);
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* get jump table entry as target */");
Christian Würdig's avatar
Christian Würdig committed
942
		IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
943

944
945
		fprintf(F, "\t.section\t.rodata\n");
		fprintf(F, "\t.align 4\n");
Christian Würdig's avatar
Christian Würdig committed
946

947
		fprintf(F, "%s:\n", tbl.label);
Christian Würdig's avatar
Christian Würdig committed
948

949
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
Christian Würdig's avatar
Christian Würdig committed
950
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */",  tbl.branches[0].value);
951
		IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
952

953
954
955
956
957
		last_value = tbl.branches[0].value;
		for (i = 1; i < tbl.num_branches; ++i) {
			while (++last_value < tbl.branches[i].value) {
				snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
				snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
Christian Würdig's avatar
Christian Würdig committed
958
				IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
959
			}
960
961
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf));
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", last_value);
Christian Würdig's avatar
Christian Würdig committed
962
			IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
963
964
		}

Christian Würdig's avatar
Christian Würdig committed
965
		fprintf(F, "\n\t.text\n\n");
966
967
968
969
970
	}
	else {
		/* one jump is enough */
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* only one case given */");
Christian Würdig's avatar
Christian Würdig committed
971
		IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
972
973
	}

Christian Würdig's avatar
Christian Würdig committed
974
975
	if (tbl.label)
		free(tbl.label);
Christian Würdig's avatar
Christian Würdig committed
976
977
978
979
980
981
982
	if (tbl.branches)
		free(tbl.branches);
}

/**
 * Emits code for a unconditional jump.
 */
Michael Beck's avatar
Michael Beck committed
983
static void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
984
	ir_node *block, *next_bl;
Christian Würdig's avatar
Christian Würdig committed
985
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
986
	char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
987

988
989
990
	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);

991
992
	/* we have a block schedule */
	next_bl = next_blk_sched(block);
993
994
	if (get_cfop_target_block(irn) != next_bl) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
Christian Würdig's avatar
Christian Würdig committed
995
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F) */", irn, get_cfop_target_block(irn));
996
997
998
	}
	else {
		cmd_buf[0] = '\0';
Christian Würdig's avatar
Christian Würdig committed
999
		lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(irn, buf));
1000
	}
Christian Würdig's avatar
Christian Würdig committed
1001
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
1002
1003
}

Christian Würdig's avatar
Christian Würdig committed
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
/****************************
 *                  _
 *                 (_)
 *  _ __  _ __ ___  _  ___
 * | '_ \| '__/ _ \| |/ __|
 * | |_) | | | (_) | |\__ \
 * | .__/|_|  \___/| ||___/
 * | |            _/ |
 * |_|           |__/
 ****************************/

Christian Würdig's avatar
Christian Würdig committed
1015
1016
1017
/**
 * Emits code for a proj -> node
 */
Michael Beck's avatar
Michael Beck committed
1018
static void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1019
1020
	ir_node *pred = get_Proj_pred(irn);

Christian Würdig's avatar
Christian Würdig committed
1021
	if (get_irn_op(pred) == op_Start) {
Christian Würdig's avatar
Christian Würdig committed
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
		switch(get_Proj_proj(irn)) {
			case pn_Start_X_initial_exec:
				emit_Jmp(irn, env);
				break;
			default:
				break;
		}
	}
}

1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
/**********************************
 *   _____                  ____
 *  / ____|                |  _ \
 * | |     ___  _ __  _   _| |_) |
 * | |    / _ \| '_ \| | | |  _ <
 * | |___| (_) | |_) | |_| | |_) |
 *  \_____\___/| .__/ \__, |____/
 *             | |     __/ |
 *             |_|    |___/
 **********************************/

1043
1044
1045
/**
 * Emit movsb/w instructions to make mov count divideable by 4
 */
1046
static void emit_CopyB_prolog(FILE *F, int rem, int size) {
Christian Würdig's avatar
Christian Würdig committed
1047
1048
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];

1049
	fprintf(F, "\t/* memcopy %d bytes*/\n", size);
Christian Würdig's avatar
Christian Würdig committed
1050
1051
1052

	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
Christian Würdig's avatar
Christian Würdig committed
1053
	IA32_DO_EMIT(NULL);
1054
1055
1056

	switch(rem) {
		case 1:
Christian Würdig's avatar
Christian Würdig committed
1057
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
Christian Würdig's avatar
Christian Würdig committed
1058
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 1 */");
1059
1060
			break;
		case 2:
Christian Würdig's avatar
Christian Würdig committed
1061
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
Christian Würdig's avatar
Christian Würdig committed
1062
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 2 */");
1063
1064
			break;
		case 3:
Christian Würdig's avatar
Christian Würdig committed
1065
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
Christian Würdig's avatar
Christian Würdig committed
1066
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
Christian Würdig's avatar
Christian Würdig committed
1067
			IA32_DO_EMIT(NULL);
Christian Würdig's avatar
Christian Würdig committed
1068
			snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
Christian Würdig's avatar
Christian Würdig committed
1069
			snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
1070
1071
			break;
	}
Christian Würdig's avatar
Christian Würdig committed
1072

Christian Würdig's avatar
Christian Würdig committed
1073
	IA32_DO_EMIT(NULL);
1074
1075
}

1076
1077
1078
/**
 * Emit rep movsd instruction for memcopy.
 */
Michael Beck's avatar
Michael Beck committed
1079
static void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
1080
1081
1082
1083
1084
	FILE    *F         = emit_env->out;
	tarval  *tv        = get_ia32_Immop_tarval(irn);
	int      rem       = get_tarval_long(tv);
	ir_node *size_node = get_irn_n(irn, 2);
	int      size;
Christian Würdig's avatar
Christian Würdig committed
1085
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1086

1087
1088
1089
1090
	/* beware: size_node could be a be_Copy to fulfill constraints for ecx */
	size_node = be_is_Copy(size_node) ? be_get_Copy_op(size_node) : size_node;
	size      = get_tarval_long(get_ia32_Immop_tarval(size_node));

1091
1092
	emit_CopyB_prolog(F, rem, size);

Christian Würdig's avatar
Christian Würdig committed
1093
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
Christian Würdig's avatar
Christian Würdig committed
1094
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy */");
Christian Würdig's avatar
Christian Würdig committed
1095
	IA32_DO_EMIT(irn);
1096
1097
}

1098
1099
1100
/**
 * Emits unrolled memcopy.
 */
Michael Beck's avatar
Michael Beck committed
1101
static void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
1102
1103
1104
	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
1105
	char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1106
1107
1108
1109
1110

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

	size >>= 2;
	while (size--) {
Christian Würdig's avatar
Christian Würdig committed
1111
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
Christian Würdig's avatar
Christian Würdig committed
1112
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy unrolled */");
Christian Würdig's avatar
Christian Würdig committed
1113
		IA32_DO_EMIT(irn);
1114
1115
1116
	}
}

Christian Würdig's avatar
Christian Würdig committed
1117
1118


1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
/***************************
 *   _____
 *  / ____|
 * | |     ___  _ ____   __
 * | |    / _ \| '_ \ \ / /
 * | |___| (_) | | | \ V /
 *  \_____\___/|_| |_|\_/
 *
 ***************************/

/**
 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
 */
Christian Würdig's avatar
Christian Würdig committed
1132
static void emit_ia32_Conv_with_FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1133
1134
1135
1136
	FILE               *F        = emit_env->out;
	const lc_arg_env_t *env      = ia32_get_arg_env();
	ir_mode	           *src_mode = get_ia32_src_mode(irn);
	ir_mode            *tgt_mode = get_ia32_tgt_mode(irn);
1137
	char               *from, *to, buf[64];