ia32_emitter.c 66.1 KB
Newer Older
1
2
/**
 * This file implements the node emitter.
Christian Würdig's avatar
Christian Würdig committed
3
 * @author Christian Wuerdig
4
5
6
 * $Id$
 */

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"
23
#include "execfreq.h"
Christian Würdig's avatar
Christian Würdig committed
24

25
#include "../besched_t.h"
Christian Würdig's avatar
Christian Würdig committed
26
#include "../benode_t.h"
Michael Beck's avatar
Michael Beck committed
27
#include "../beabi.h"
28
#include "../be_dbgout.h"
Christian Würdig's avatar
Christian Würdig committed
29

30
#include "ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
31
#include "gen_ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
32
#include "gen_ia32_regalloc_if.h"
33
34
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
Christian Würdig's avatar
Christian Würdig committed
35
#include "ia32_map_regs.h"
Christian Würdig's avatar
Christian Würdig committed
36
#include "bearch_ia32_t.h"
Christian Würdig's avatar
Christian Würdig committed
37

38
#define BLOCK_PREFIX(x) ".L" x
Michael Beck's avatar
Michael Beck committed
39

Christian Würdig's avatar
Christian Würdig committed
40
41
#define SNPRINTF_BUF_LEN 128

42
/* global arch_env for lc_printf functions */
Christian Würdig's avatar
Christian Würdig committed
43
static const arch_env_t *arch_env = NULL;
44

Michael Beck's avatar
Michael Beck committed
45
46
47
48
49
50
51
52
/** by default, we generate assembler code for the Linux gas */
asm_flavour_t asm_flavour = ASM_LINUX_GAS;

/**
 * Switch to a new section
 */
void ia32_switch_section(FILE *F, section_t sec) {
	static section_t curr_sec = NO_SECTION;
53
	static const char *text[ASM_MAX][SECTION_MAX] = {
Michael Beck's avatar
Michael Beck committed
54
		{
Michael Beck's avatar
Michael Beck committed
55
56
57
			".section\t.text",
			".section\t.data",
			".section\t.rodata",
58
			".section\t.bss",
Christian Würdig's avatar
Christian Würdig committed
59
60
			".section\t.tbss,\"awT\",@nobits",
			".section\t.ctors,\"aw\",@progbits"
Michael Beck's avatar
Michael Beck committed
61
62
		},
		{
Michael Beck's avatar
Michael Beck committed
63
64
65
			".section\t.text",
			".section\t.data",
			".section .rdata,\"dr\"",
66
			".section\t.bss",
Christian Würdig's avatar
Christian Würdig committed
67
68
			".section\t.tbss,\"awT\",@nobits",
			".section\t.ctors,\"aw\",@progbits"
Michael Beck's avatar
Michael Beck committed
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
		}
	};

	if (curr_sec == sec)
		return;

	curr_sec = sec;
	switch (sec) {

	case NO_SECTION:
		break;

	case SECTION_TEXT:
	case SECTION_DATA:
	case SECTION_RODATA:
	case SECTION_COMMON:
Michael Beck's avatar
Michael Beck committed
85
	case SECTION_TLS:
Christian Würdig's avatar
Christian Würdig committed
86
	case SECTION_CTOR:
Michael Beck's avatar
Michael Beck committed
87
		fprintf(F, "\t%s\n", text[asm_flavour][sec]);
88
89
90
91
		break;

	default:
		break;
Michael Beck's avatar
Michael Beck committed
92
93
94
95
96
97
98
99
100
101
102
103
	}
}

static void ia32_dump_function_object(FILE *F, const char *name)
{
	switch (asm_flavour) {
	case ASM_LINUX_GAS:
		fprintf(F, "\t.type\t%s, @function\n", name);
		break;
	case ASM_MINGW_GAS:
		fprintf(F, "\t.def\t%s;\t.scl\t2;\t.type\t32;\t.endef\n", name);
		break;
104
105
	default:
		break;
Michael Beck's avatar
Michael Beck committed
106
107
108
109
110
111
112
113
114
	}
}

static void ia32_dump_function_size(FILE *F, const char *name)
{
	switch (asm_flavour) {
	case ASM_LINUX_GAS:
		fprintf(F, "\t.size\t%s, .-%s\n", name, name);
		break;
115
116
	default:
		break;
Michael Beck's avatar
Michael Beck committed
117
118
119
	}
}

Christian Würdig's avatar
Christian Würdig committed
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

/* 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;
134
135
}

Christian Würdig's avatar
Christian Würdig committed
136
137

/**
Christian Würdig's avatar
Christian Würdig committed
138
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
139
 */
Christian Würdig's avatar
Christian Würdig committed
140
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
141
142
143
144
145
146
147
148
149
	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
150
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
151

Christian Würdig's avatar
Christian Würdig committed
152
	assert(reg && "no in register found");
153

154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
	/* in case of a joker register: just return a valid register */
	if (arch_register_type_is(reg, joker)) {
		arch_register_req_t       req;
		const arch_register_req_t *p_req;

		/* ask for the requirements */
		p_req = arch_get_register_req(arch_env, &req, irn, pos);

		if (arch_register_req_is(p_req, limited)) {
			/* in case of limited requirements: get the first allowed register */

			bitset_t *bs = bitset_alloca(arch_register_class_n_regs(p_req->cls));
			int      idx;

			p_req->limited(p_req->limited_env, bs);
			idx = bitset_next_set(bs, 0);
			reg = arch_register_for_index(p_req->cls, idx);
		}
		else {
			/* otherwise get first register in class */
			reg = arch_register_for_index(p_req->cls, 0);
		}
	}
177

Christian Würdig's avatar
Christian Würdig committed
178
179
180
181
182
183
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
184
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
	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
213
214
215
	return reg;
}

Michael Beck's avatar
Michael Beck committed
216
217
218
219
220
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
221
222
223
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
224
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
225
226
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
227
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
228
		reg = get_in_reg(irn, pos);
229
230
231
232
233
234

		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
235
236
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
237
		/* destination address mode nodes don't have outputs */
238
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
239
240
241
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
242
		reg = get_out_reg(irn, pos);
243
244
		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
245
	}
246
	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
247
248
249
250
251
252
253
254
255
}

/**
 * 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;
256
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
257
258
	int         nr = occ->width - 1;

259
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
260
		return lc_appendable_snadd(app, "(null)", 6);
Christian Würdig's avatar
Christian Würdig committed
261

262
	buf = get_ia32_reg_name(irn, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
263

264
265
	/* append the stupid % to register names */
	lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
266
	return lc_appendable_snadd(app, buf, strlen(buf));
267
268
}

Michael Beck's avatar
Michael Beck committed
269
270
271
272
273
274
/**
 * 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)
{
275
	const char  *buf;
276
	ir_node     *irn = arg->v_ptr;
Michael Beck's avatar
Michael Beck committed
277
278
	int         nr = occ->width - 1;
	ia32_attr_t *attr;
279
	int         res = 0;
Michael Beck's avatar
Michael Beck committed
280

281
	if (! irn)
Michael Beck's avatar
Michael Beck committed
282
283
		return lc_appendable_snadd(app, "(null)", 6);

284
	attr = get_ia32_attr(irn);
285
286
287
	buf  = attr->x87[nr]->name;

	res += lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
288
	res += lc_appendable_snadd(app, buf, strlen(buf));
289
290

	return res;
Michael Beck's avatar
Michael Beck committed
291
292
}

Christian Würdig's avatar
Christian Würdig committed
293
/**
294
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
295
296
297
298
299
 */
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;
300
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
301

302
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
303
304
		return lc_arg_append(app, occ, "(null)", 6);

305
	if (occ->conversion == 'C') {
306
		buf = get_ia32_cnst(irn);
Christian Würdig's avatar
Christian Würdig committed
307
	}
308
	else { /* 'O' */
309
		buf = get_ia32_am_offs(irn);
Christian Würdig's avatar
Christian Würdig committed
310
311
	}

Christian Würdig's avatar
Christian Würdig committed
312
	return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
313
314
315
316
317
318
319
320
}

/**
 * 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)
{
321
	ir_node *irn  = arg->v_ptr;
322
	ir_mode *mode = get_ia32_ls_mode(irn);;
323
324

	if (mode == mode_T) {
325
326
		mode = get_ia32_ls_mode(irn);
		assert(mode != NULL);
327
	}
Christian Würdig's avatar
Christian Würdig committed
328

329
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
330
331
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
332
333
334
335
336
337
	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
338
339
340
341
342
343
344
}

/**
 * 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
345
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
346

Christian Würdig's avatar
Christian Würdig committed
347
348
349
	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
350
	static const lc_arg_handler_t ia32_x87_handler   = { ia32_get_arg_type, ia32_get_x87_name };
Christian Würdig's avatar
Christian Würdig committed
351

Christian Würdig's avatar
Christian Würdig committed
352
353
354
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
355

356
357
358
359
360
		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
361
		lc_arg_register(env, "ia32:x87",  'X', &ia32_x87_handler);
Christian Würdig's avatar
Christian Würdig committed
362
	}
Christian Würdig's avatar
Christian Würdig committed
363

Christian Würdig's avatar
Christian Würdig committed
364
	return env;
Christian Würdig's avatar
Christian Würdig committed
365
366
}

367
static const char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
Christian Würdig's avatar
Christian Würdig committed
368
369
370
371
372
373
	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
374
			return (char *)arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
375
376
377
	}
}

Christian Würdig's avatar
Christian Würdig committed
378
379
380
/**
 * Emits registers and/or address mode of a binary operation.
 */
381
const char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
382
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
383

384
385
386
387
#define PRODUCES_RESULT(n)   \
	(!(is_ia32_St(n)      || \
	is_ia32_Store8Bit(n)  || \
	is_ia32_CondJmp(n)    || \
Christian Würdig's avatar
Christian Würdig committed
388
	is_ia32_xCondJmp(n)   || \
389
390
	is_ia32_CmpSet(n)     || \
	is_ia32_xCmpSet(n)    || \
391
	is_ia32_SwitchJmp(n)))
Christian Würdig's avatar
Christian Würdig committed
392

Christian Würdig's avatar
Christian Würdig committed
393
394
395
396
397
398
399
400
401
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
402
			if (is_ia32_ImmConst(n)) {
Christian Würdig's avatar
Christian Würdig committed
403
404
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
405
406
407
			else if (is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, OFFSET FLAT:%s", n, get_ia32_cnst(n));
			}
Christian Würdig's avatar
Christian Würdig committed
408
409
410
			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
411
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
412
				const arch_register_t *in;
Christian Würdig's avatar
Christian Würdig committed
413
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
414

Christian Würdig's avatar
Christian Würdig committed
415
416
417
				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
418

Christian Würdig's avatar
Christian Würdig committed
419
420
421
422
423
424
				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
425
426
427
			}
			break;
		case ia32_AddrModeS:
428
429
430
431
432
			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 {
433
434
435
436
				if (PRODUCES_RESULT(n)) {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %s", n, ia32_emit_am(n, env));
				}
				else {
Christian Würdig's avatar
Christian Würdig committed
437
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, ia32_emit_am(n, env));
438
				}
439
			}
Christian Würdig's avatar
Christian Würdig committed
440
441
			break;
		case ia32_AddrModeD:
442
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
443
444
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
					ia32_emit_am(n, env),
445
446
					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
447
448
			}
			else {
449
450
				const arch_register_t *in1  = get_in_reg(n, get_irn_arity(n) == 5 ? 3 : 2);
				ir_mode               *mode = get_ia32_ls_mode(n);
Christian Würdig's avatar
Christian Würdig committed
451
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
452

453
454
455
456
457
				if(mode == NULL) {
					// except stores only integer nodes support dest AM
					mode = mode_Is;
				}

Christian Würdig's avatar
Christian Würdig committed
458
459
460
461
462
463
				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";
				}
464

Christian Würdig's avatar
Christian Würdig committed
465
				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
466
467
468
469
470
471
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
472
473
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
474
475
476
	return buf;
}

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
/**
 * Returns the xxx PTR string for a given mode
 *
 * @param mode      the mode
 * @param x87_insn  if non-zero returns the string for a x87 instruction
 *                  else for a SSE instruction
 */
static const char *pointer_size(ir_mode *mode, int x87_insn)
{
	if (mode) {
		switch (get_mode_size_bits(mode)) {
		case 8:  return "BYTE PTR";
		case 16: return "WORD PTR";
		case 32: return "DWORD PTR";
		case 64:
			if (x87_insn)
				return "QWORD PTR";
			return NULL;
		case 80:
		case 96: return "XWORD PTR";
		default: return NULL;
		}
	}
	return NULL;
}

503
504
505
/**
 * Emits registers and/or address mode of a binary operation.
 */
506
const char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
	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)) {
522
523
524
				ir_mode *mode = get_ia32_ls_mode(n);
				const char *p = pointer_size(mode, 1);
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s %s", p, get_ia32_cnst(n));
525
526
527
528
529
530
531
532
			}
			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;

533
534
				in  = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
				out = out ? out : in1;
535

Christian Würdig's avatar
Christian Würdig committed
536
537
				snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s",
					arch_register_get_name(out), arch_register_get_name(in));
538
539
540
541
542
543
544
545
546
547
548
549
550
			}
			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");
	}

	return buf;
}

Christian Würdig's avatar
Christian Würdig committed
551
552
553
/**
 * Emits registers and/or address mode of a unary operation.
 */
554
const char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
555
556
557
558
559
560
561
562
563
564
565
	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:
566
			if (is_ia32_ImmConst(n)) {
567
568
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%C", n);
			}
569
570
571
			else if (is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "OFFSET FLAT:%C", n);
			}
572
			else {
Christian Würdig's avatar
Christian Würdig committed
573
574
575
				if (is_ia32_MulS(n) || is_ia32_Mulh(n)) {
					/* MulS and Mulh implicitly multiply by EAX */
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S", n);
576
577
				} else if(is_ia32_Push(n)) {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S", n);
578
579
				} else if(is_ia32_Pop(n)) {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%2D", n);
580
				} else {
Christian Würdig's avatar
Christian Würdig committed
581
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
582
				}
583
			}
Christian Würdig's avatar
Christian Würdig committed
584
			break;
585
		case ia32_AddrModeD:
586
			assert(!is_ia32_Push(n));
587
			snprintf(buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
588
			break;
589
590
591
592
593
		case ia32_AddrModeS:
			/*
				Mulh is emitted via emit_unop
				imul [MEM]  means EDX:EAX <- EAX * [MEM]
			*/
594
			assert((is_ia32_Mulh(n) || is_ia32_MulS(n) || is_ia32_Push(n)) && "Only MulS and Mulh can have AM source as unop");
595
596
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
			break;
Christian Würdig's avatar
Christian Würdig committed
597
598
599
600
601
602
603
604
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
605
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
606
 */
607
const char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
608
609
	ia32_am_flavour_t am_flav    = get_ia32_am_flavour(n);
	int               had_output = 0;
610
611
	char              *s;
	const char        *p;
Christian Würdig's avatar
Christian Würdig committed
612
613
614
	static struct obstack *obst  = NULL;
	ir_mode *mode = get_ia32_ls_mode(n);

615
616
617
	/* just to be sure... */
	assert(!is_ia32_use_frame(n) || get_ia32_frame_ent(n) != NULL);

Christian Würdig's avatar
Christian Würdig committed
618
619
620
621
622
623
624
625
626
627
628
629
630
	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);

631
	p = pointer_size(mode, ia32_has_x87_register(n) || is_ia32_GetST0(n) || is_ia32_SetST0(n));
632
633
	if (p)
		obstack_printf(obst, "%s ", p);
Christian Würdig's avatar
Christian Würdig committed
634

635
636
637
638
639
640
	/* 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
641
642

	if (am_flav & ia32_B) {
643
		obstack_printf(obst, "[");
Christian Würdig's avatar
Christian Würdig committed
644
645
646
647
648
649
650
651
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}
652
653
654
		else {
			obstack_printf(obst, "[");
		}
Christian Würdig's avatar
Christian Würdig committed
655
656
657
658
659
660
661
662
663
664
665

		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) {
Matthias Braun's avatar
Matthias Braun committed
666
		int offs = get_ia32_am_offs_int(n);
667

Matthias Braun's avatar
Matthias Braun committed
668
		if (offs != 0) {
669
670
			/* omit explicit + if there was no base or index */
			if (! had_output) {
Matthias Braun's avatar
Matthias Braun committed
671
672
673
				obstack_printf(obst, "[%d", offs);
			} else {
				obstack_printf(obst, "%+d", offs);
674
			}
675

676
677
			had_output = 1;
		}
Christian Würdig's avatar
Christian Würdig committed
678
679
	}

680
681
	if (had_output)
		obstack_printf(obst, "] ");
Christian Würdig's avatar
Christian Würdig committed
682

683
684
	obstack_1grow(obst, '\0');
	s = obstack_finish(obst);
Christian Würdig's avatar
Christian Würdig committed
685
686
687
688

	return s;
}

689
690
691
692
693
694
695
696
/**
 * emit an address
 */
const char *ia32_emit_adr(const ir_node *irn, ia32_emit_env_t *env)
{
	static char buf[SNPRINTF_BUF_LEN];
	ir_mode    *mode = get_ia32_ls_mode(irn);
	const char *adr  = get_ia32_cnst(irn);
697
	const char *pref = pointer_size(mode, ia32_has_x87_register(irn));
Christian Würdig's avatar
Christian Würdig committed
698

699
700
701
	snprintf(buf, SNPRINTF_BUF_LEN, "%s %s", pref ? pref : "", adr);
	return buf;
}
Christian Würdig's avatar
Christian Würdig committed
702

Christian Würdig's avatar
Christian Würdig committed
703
704
705
/**
 * Formated print of commands and comments.
 */
Christian Würdig's avatar
Christian Würdig committed
706
707
708
709
710
711
712
713
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
714
715
716
717
}



Christian Würdig's avatar
Christian Würdig committed
718
/**
Christian Würdig's avatar
Christian Würdig committed
719
720
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
721
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
722
723
724
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
725
726
}

Christian Würdig's avatar
Christian Würdig committed
727

Christian Würdig's avatar
Christian Würdig committed
728

Christian Würdig's avatar
Christian Würdig committed
729
730
731
732
733
734
735
736
737
738
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
739
#undef IA32_DO_EMIT
Christian Würdig's avatar
Christian Würdig committed
740
#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
Christian Würdig's avatar
Christian Würdig committed
741

742
743
744
745
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
746
747
	const char *name;
	pn_Cmp      num;
748
749
750
751
752
753
};

/*
 * positive conditions for signed compares
 */
static const struct cmp2conditon_t cmp2condition_s[] = {
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
	{ 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 },     /* != */
	{ NULL,              pn_Cmp_Leg},     /* Floating point: ordered */
	{ NULL,              pn_Cmp_Uo },     /* Floating point: unordered */
	{ "e",               pn_Cmp_Ue },     /* Floating point: unordered or == */
	{ "b",               pn_Cmp_Ul },     /* Floating point: unordered or < */
	{ "be",              pn_Cmp_Ule },    /* Floating point: unordered or <= */
	{ "a",               pn_Cmp_Ug },     /* Floating point: unordered or > */
	{ "ae",              pn_Cmp_Uge },    /* Floating point: unordered or >= */
	{ "ne",              pn_Cmp_Ne },     /* Floating point: unordered or != */
	{ NULL,              pn_Cmp_True },   /* always true */
770
771
772
773
774
775
};

/*
 * positive conditions for unsigned compares
 */
static const struct cmp2conditon_t cmp2condition_u[] = {
Christian Würdig's avatar
Christian Würdig committed
776
777
778
	{ NULL,              pn_Cmp_False },  /* always false */
	{ "e",               pn_Cmp_Eq },     /* == */
	{ "b",               pn_Cmp_Lt },     /* < */
Christian Würdig's avatar
Christian Würdig committed
779
	{ "be",              pn_Cmp_Le },     /* <= */
Christian Würdig's avatar
Christian Würdig committed
780
781
782
783
	{ "a",               pn_Cmp_Gt },     /* > */
	{ "ae",              pn_Cmp_Ge },     /* >= */
	{ "ne",              pn_Cmp_Lg },     /* != */
	{ NULL,              pn_Cmp_True },   /* always true */
784
785
786
787
788
};

/*
 * returns the condition code
 */
789
static const char *get_cmp_suffix(int cmp_code)
790
{
791
792
	assert( (cmp2condition_s[cmp_code & 15].num) == (cmp_code & 15));
	assert( (cmp2condition_u[cmp_code & 7].num) == (cmp_code & 7));
793

794
795
796
797
798
	if((cmp_code & ia32_pn_Cmp_Unsigned)) {
		return cmp2condition_u[cmp_code & 7].name;
	} else {
		return cmp2condition_s[cmp_code & 15].name;
	}
799
800
}

801
802
803
804
805
806
807
/**
 * 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
808
809
810
811
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
812
	ir_node *bl = get_cfop_target_block(irn);
813

814
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
815
816
	return buf;
}
817

818
819
/** Return the next block in Block schedule */
static ir_node *next_blk_sched(const ir_node *block) {
Michael Beck's avatar
Michael Beck committed
820
	return get_irn_link(block);
821
822
}

823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
/**
 * Returns the Proj with projection number proj and NOT mode_M
 */
static ir_node *get_proj(const ir_node *irn, long proj) {
	const ir_edge_t *edge;
	ir_node         *src;

	assert(get_irn_mode(irn) == mode_T && "expected mode_T node");

	foreach_out_edge(irn, edge) {
		src = get_edge_src_irn(edge);

		assert(is_Proj(src) && "Proj expected");
		if (get_irn_mode(src) == mode_M)
			continue;

		if (get_Proj_proj(src) == proj)
			return src;
	}
	return NULL;
}

Christian Würdig's avatar
Christian Würdig committed
845
846
847
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
848
static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
849
850
851
852
	const ir_node *proj_true;
	const ir_node *proj_false;
	const ir_node *block;
	const ir_node *next_block;
Christian Würdig's avatar
Christian Würdig committed
853
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
854
855
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
856
	int is_unsigned;
857
858
	int pnc;
	int flipped = 0;
Christian Würdig's avatar
Christian Würdig committed
859

860
	/* get both Proj's */
861
862
	proj_true = get_proj(irn, pn_Cond_true);
	assert(proj_true && "CondJmp without true Proj");
Christian Würdig's avatar
Christian Würdig committed
863

864
865
866
867
	proj_false = get_proj(irn, pn_Cond_false);
	assert(proj_false && "CondJmp without false Proj");

	pnc = get_ia32_pncode(irn);
868
869
870

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
871
872

	/* we have a block schedule */
873
	next_block = next_blk_sched(block);
874

875
	if (get_cfop_target_block(proj_true) == next_block) {
876
		/* exchange both proj's so the second one can be omitted */
877
878
		const ir_node *t = proj_true;

879
880
881
882
		proj_true  = proj_false;
		proj_false = t;
		flipped    = 1;
		pnc        = get_negated_pnc(pnc, mode);
883
884
885
	}

	/* the first Proj must always be created */
886
	is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
887
888
889
890
891
892
893
894

	/* in case of unordered compare, check for parity */
	if (pnc & pn_Cmp_Uo) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jp %s", get_cfop_target(proj_true, buf));
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* jump to false if result is unordered */");
		IA32_DO_EMIT(irn);
	}

895
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
896
	         get_cmp_suffix(pnc),
897
898
	         get_cfop_target(proj_true, buf));
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* %s(a, b) %s*/",
899
	         get_pnc_string(pnc & ~ia32_pn_Cmp_Unsigned), flipped ? "(was flipped)" : "");
Christian Würdig's avatar
Christian Würdig committed
900
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
901

902
	/* the second Proj might be a fallthrough */
903
904
	if (get_cfop_target_block(proj_false) != next_block) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj_false, buf));
905
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
Christian Würdig's avatar
Christian Würdig committed
906
	}
907
908
	else {
		cmd_buf[0] = '\0';
909
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(proj_false, buf));
910
911
	}
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
912
913
914
}

/**
Christian Würdig's avatar
Christian Würdig committed
915
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
916
 */
917
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
918
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
919
920
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
921

922
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
923
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
924
	IA32_DO_EMIT(irn);
925
	finish_CondJmp(F, irn, mode_Is);
Christian Würdig's avatar
Christian Würdig committed
926
927
}

Christian Würdig's avatar
Christian Würdig committed
928
929
930
/**
 * Emits code for conditional jump with two variables.
 */
931
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
932
933
934
	CondJmp_emitter(irn, env);
}

935
936
937
938
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
939
940
941

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

Christian Würdig's avatar
Christian Würdig committed
942
	FILE       *F   = env->out;
Michael Beck's avatar
Michael Beck committed
943
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
944
	const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
Christian Würdig's avatar
Christian Würdig committed
945
946
	char        cmd_buf[SNPRINTF_BUF_LEN];
	char        cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
947

Christian Würdig's avatar
Christian Würdig committed
948
	if (! op2)
Michael Beck's avatar
Michael Beck committed
949
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
950

951
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
Christian Würdig's avatar
Christian Würdig committed
952
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
953

Christian Würdig's avatar
Christian Würdig committed
954
	IA32_DO_EMIT(irn);
955
	finish_CondJmp(F, irn, mode_Is);
956
957

#undef IA32_IS_IMMOP
958
959
960
961
962
963
964
965
966
}

/**
 * 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);
}

967
968
969
970
971
972
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
973
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
Christian Würdig's avatar
Christian Würdig committed
974
	IA32_DO_EMIT(irn);
975
	finish_CondJmp(F, irn, mode_Is);
976
}
977

978
979
980
981
982
983
984
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
985
	IA32_DO_EMIT(irn);
986
	finish_CondJmp(F, irn, mode_Is);
987
}
Christian Würdig's avatar
Christian Würdig committed
988

Christian Würdig's avatar
Christian Würdig committed
989
990
991
992
993
994
995
/**
 * Emits code for conditional SSE floating point jump with two variables.
 */
static void emit_ia32_xCondJmp(ir_node *irn, ia32_emit_env_t *env) {
	FILE *F = env->out;
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
996
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
997

998
999
	lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", irn, ia32_emit_binop(irn, env));
	lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
1000
1001
	IA32_DO_EMIT(irn);

1002
	finish_CondJmp(F, irn, mode_F);
Christian Würdig's avatar
Christian Würdig committed
1003
1004
}

Michael Beck's avatar
Michael Beck committed
1005
1006
1007
/**
 * Emits code for conditional x87 floating point jump with two variables.
 */
1008
static void emit_ia32_x87CondJmp(ir_node *irn, ia32_emit_env_t *env) {
Michael Beck's avatar
Michael Beck committed
1009
1010
1011
1012
1013
1014
1015
1016
	FILE *F = env->out;
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
	ia32_attr_t *attr = get_ia32_attr(irn);
	const char *reg = attr->x87[1]->name;
	const char *instr = "fcom";
	int reverse = 0;

Michael Beck's avatar
BugFix:    
Michael Beck committed
1017
	switch (get_ia32_irn_opcode(irn)) {
Michael Beck's avatar
Michael Beck committed
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
	case iro_ia32_fcomrJmp:
		reverse = 1;
	case iro_ia32_fcomJmp:
	default:
		instr = "fucom";
		break;
	case iro_ia32_fcomrpJmp:
		reverse = 1;
	case iro_ia32_fcompJmp:
		instr = "fucomp";
		break;
	case iro_ia32_fcomrppJmp:
		reverse = 1;
	case iro_ia32_fcomppJmp:
		instr = "fucompp";
		reg = "";
		break;
	}

	if (reverse)
1038
		set_ia32_pncode(irn, get_inversed_pnc(get_ia32_pncode(irn)));
Michael Beck's avatar
Michael Beck committed
1039

1040
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s%s", instr, reg[0] == '\0' ? "" : "%", reg);
Michael Beck's avatar
Michael Beck committed
1041
1042
1043
1044
1045
1046
1047
1048
1049
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
	IA32_DO_EMIT(irn);
	lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "fnstsw %%ax", irn);
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Store x87 FPU Control Word */");
	IA32_DO_EMIT(irn);
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "sahf");
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Store ah into flags */");
	IA32_DO_EMIT(irn);

Michael Beck's avatar
BugFix:    
Michael Beck committed
1050
	/* the compare flags must be evaluated using carry , ie unsigned */
1051
	finish_CondJmp(F, irn, mode_Is);
Michael Beck's avatar
Michael Beck committed
1052
1053
}

1054
static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1055
1056
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1057
	const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn));
Christian Würdig's avatar
Christian Würdig committed
1058
	int is_PsiCondCMov     = is_ia32_PsiCondCMov(irn);
Matthias Braun's avatar
Matthias Braun committed
1059
1060
	int idx_left  = 2 - is_PsiCondCMov;
	int idx_right = 3 - is_PsiCondCMov;
Christian Würdig's avatar
Christian Würdig committed
1061

1062
1063
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1064
1065
1066
	const arch_register_t *in1, *in2, *out;

	out = arch_get_irn_register(env->arch_env, irn);
Matthias Braun's avatar
Matthias Braun committed
1067
1068
	in1 = arch_get_irn_register(env->arch_env, get_irn_n(irn, idx_left));
	in2 = arch_get_irn_register(env->arch_env, get_irn_n(irn, idx_right));
Christian Würdig's avatar
Christian Würdig committed
1069

Christian Würdig's avatar
Christian Würdig committed
1070
1071
	/* we have to emit the cmp first, because the destination register */
	/* could be one of the compare registers                           */
1072
	if (is_ia32_CmpCMov(irn)) {
1073
1074
1075
1076
1077
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %2S", irn, irn);
	}
	else if (is_ia32_xCmpCMov(irn)) {
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %1S, %2S", get_irn_n(irn, 0), irn, irn);
	}
Christian Würdig's avatar
Christian Würdig committed
1078
	else if (is_PsiCondCMov) {