ia32_emitter.c 67 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
58
			".section\t.text",
			".section\t.data",
			".section\t.rodata",
			".section\t.text",
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
66
			".section\t.text",
			".section\t.data",
			".section .rdata,\"dr\"",
			".section\t.text",
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
/**
 * returns true if a node has x87 registers
 */
Christian Würdig's avatar
Christian Würdig committed
134
static INLINE int has_x87_register(const ir_node *n) {
135
	return is_irn_machine_user(n, 0);
136
137
}

Christian Würdig's avatar
Christian Würdig committed
138
139
140
/* 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;
141
142
}

Christian Würdig's avatar
Christian Würdig committed
143
144

/**
Christian Würdig's avatar
Christian Würdig committed
145
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
146
 */
Christian Würdig's avatar
Christian Würdig committed
147
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
148
149
150
151
152
153
154
155
156
	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
157
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
158

Christian Würdig's avatar
Christian Würdig committed
159
	assert(reg && "no in register found");
160

161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
	/* 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);
		}
	}
184

Christian Würdig's avatar
Christian Würdig committed
185
186
187
188
189
190
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
191
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
	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
220
221
222
	return reg;
}

Michael Beck's avatar
Michael Beck committed
223
224
225
226
227
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
228
229
230
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
231
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
232
233
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
234
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
235
		reg = get_in_reg(irn, pos);
236
237
238
239
240
241

		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
242
243
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
244
		/* destination address mode nodes don't have outputs */
245
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
246
247
248
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
249
		reg = get_out_reg(irn, pos);
250
251
		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
252
	}
253
	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
254
255
256
257
258
259
260
261
262
}

/**
 * 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;
263
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
264
265
	int         nr = occ->width - 1;

266
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
267
		return lc_appendable_snadd(app, "(null)", 6);
Christian Würdig's avatar
Christian Würdig committed
268

269
	buf = get_ia32_reg_name(irn, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
270

271
272
	/* append the stupid % to register names */
	lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
273
	return lc_appendable_snadd(app, buf, strlen(buf));
274
275
}

Michael Beck's avatar
Michael Beck committed
276
277
278
279
280
281
282
/**
 * 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;
283
	ir_node     *irn = arg->v_ptr;
Michael Beck's avatar
Michael Beck committed
284
285
286
	int         nr = occ->width - 1;
	ia32_attr_t *attr;

287
	if (! irn)
Michael Beck's avatar
Michael Beck committed
288
289
		return lc_appendable_snadd(app, "(null)", 6);

290
	attr = get_ia32_attr(irn);
Michael Beck's avatar
Michael Beck committed
291
	buf = attr->x87[nr]->name;
292
	lc_appendable_chadd(app, '%');
Michael Beck's avatar
Michael Beck committed
293
294
295
	return lc_appendable_snadd(app, buf, strlen(buf));
}

Christian Würdig's avatar
Christian Würdig committed
296
/**
297
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
298
299
300
301
302
 */
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;
303
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
304

305
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
306
307
		return lc_arg_append(app, occ, "(null)", 6);

308
	if (occ->conversion == 'C') {
309
		buf = get_ia32_cnst(irn);
Christian Würdig's avatar
Christian Würdig committed
310
	}
311
	else { /* 'O' */
312
		buf = get_ia32_am_offs(irn);
Christian Würdig's avatar
Christian Würdig committed
313
314
	}

Christian Würdig's avatar
Christian Würdig committed
315
	return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
316
317
318
319
320
321
322
323
}

/**
 * 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)
{
324
325
	ir_node *irn  = arg->v_ptr;
	ir_mode *mode = get_irn_mode(irn);
326
327

	if (mode == mode_T) {
Christian Würdig's avatar
Christian Würdig committed
328
329
330
		mode = get_ia32_res_mode(irn);
		if (! mode)
			mode = get_ia32_ls_mode(irn);
331
	}
Christian Würdig's avatar
Christian Würdig committed
332

333
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
334
335
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
336
337
338
339
340
341
	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
342
343
344
345
346
347
348
}

/**
 * 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
349
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
350

Christian Würdig's avatar
Christian Würdig committed
351
352
353
	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
354
	static const lc_arg_handler_t ia32_x87_handler   = { ia32_get_arg_type, ia32_get_x87_name };
Christian Würdig's avatar
Christian Würdig committed
355

Christian Würdig's avatar
Christian Würdig committed
356
357
358
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
359

360
361
362
363
364
		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
365
		lc_arg_register(env, "ia32:x87",  'X', &ia32_x87_handler);
Christian Würdig's avatar
Christian Würdig committed
366
	}
Christian Würdig's avatar
Christian Würdig committed
367

Christian Würdig's avatar
Christian Würdig committed
368
	return env;
Christian Würdig's avatar
Christian Würdig committed
369
370
}

371
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
372
373
374
375
376
377
	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
378
			return (char *)arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
379
380
381
	}
}

Christian Würdig's avatar
Christian Würdig committed
382
383
384
/**
 * Emits registers and/or address mode of a binary operation.
 */
385
const char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
386
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
387

Christian Würdig's avatar
Christian Würdig committed
388
	/* verify that this function is never called on non-AM supporting operations */
Christian Würdig's avatar
Christian Würdig committed
389
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
Christian Würdig's avatar
Christian Würdig committed
390

391
392
393
394
#define PRODUCES_RESULT(n)   \
	(!(is_ia32_St(n)      || \
	is_ia32_Store8Bit(n)  || \
	is_ia32_CondJmp(n)    || \
Christian Würdig's avatar
Christian Würdig committed
395
	is_ia32_xCondJmp(n)   || \
396
397
	is_ia32_CmpSet(n)     || \
	is_ia32_xCmpSet(n)    || \
398
	is_ia32_SwitchJmp(n)))
Christian Würdig's avatar
Christian Würdig committed
399

Christian Würdig's avatar
Christian Würdig committed
400
401
402
403
404
405
406
407
408
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
409
			if (is_ia32_ImmConst(n)) {
Christian Würdig's avatar
Christian Würdig committed
410
411
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
412
413
414
			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
415
416
417
			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
418
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
419
				const arch_register_t *in;
Christian Würdig's avatar
Christian Würdig committed
420
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
421

Christian Würdig's avatar
Christian Würdig committed
422
423
424
				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
425

Christian Würdig's avatar
Christian Würdig committed
426
427
428
429
430
431
				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
432
433
434
			}
			break;
		case ia32_AddrModeS:
435
436
437
438
439
			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 {
440
441
442
443
				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
444
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, ia32_emit_am(n, env));
445
				}
446
			}
Christian Würdig's avatar
Christian Würdig committed
447
448
			break;
		case ia32_AddrModeD:
449
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
450
451
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
					ia32_emit_am(n, env),
452
453
					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
454
455
			}
			else {
Christian Würdig's avatar
Christian Würdig committed
456
457
458
				const arch_register_t *in1 = get_in_reg(n, get_irn_arity(n) == 5 ? 3 : 2);
				ir_mode               *mode = get_ia32_res_mode(n);
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
459
460
461
462
463
464
465
466

				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";
				}
467

Christian Würdig's avatar
Christian Würdig committed
468
				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
469
470
471
472
473
474
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
475
476
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
477
478
479
	return buf;
}

480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
/**
 * 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;
}

506
507
508
/**
 * Emits registers and/or address mode of a binary operation.
 */
509
const char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
	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)) {
525
526
527
				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));
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
			}
			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");
	}

	return buf;
}

Christian Würdig's avatar
Christian Würdig committed
555
556
557
/**
 * Emits registers and/or address mode of a unary operation.
 */
558
const char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
559
560
561
562
563
564
565
566
567
568
569
	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:
570
			if (is_ia32_ImmConst(n)) {
571
572
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%C", n);
			}
573
574
575
			else if (is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "OFFSET FLAT:%C", n);
			}
576
			else {
Christian Würdig's avatar
Christian Würdig committed
577
578
579
				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);
580
581
582
				} else if(is_ia32_Push(n)) {
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S", n);
				} else {
Christian Würdig's avatar
Christian Würdig committed
583
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
584
				}
585
			}
Christian Würdig's avatar
Christian Würdig committed
586
			break;
587
		case ia32_AddrModeD:
588
			assert(!is_ia32_Push(n));
589
			snprintf(buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
590
			break;
591
592
593
594
595
		case ia32_AddrModeS:
			/*
				Mulh is emitted via emit_unop
				imul [MEM]  means EDX:EAX <- EAX * [MEM]
			*/
596
			assert((is_ia32_Mulh(n) || is_ia32_MulS(n) || is_ia32_Push(n)) && "Only MulS and Mulh can have AM source as unop");
597
598
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
			break;
Christian Würdig's avatar
Christian Würdig committed
599
600
601
602
603
604
605
606
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
607
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
608
 */
609
const char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
610
611
	ia32_am_flavour_t am_flav    = get_ia32_am_flavour(n);
	int               had_output = 0;
612
613
	char              *s;
	const char        *p;
Christian Würdig's avatar
Christian Würdig committed
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
	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);

630
	p = pointer_size(mode, has_x87_register(n) || is_ia32_GetST0(n) || is_ia32_SetST0(n));
631
632
	if (p)
		obstack_printf(obst, "%s ", p);
Christian Würdig's avatar
Christian Würdig committed
633

634
635
636
637
638
639
	/* 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
640
641

	if (am_flav & ia32_B) {
642
		obstack_printf(obst, "[");
Christian Würdig's avatar
Christian Würdig committed
643
644
645
646
647
648
649
650
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}
651
652
653
		else {
			obstack_printf(obst, "[");
		}
Christian Würdig's avatar
Christian Würdig committed
654
655
656
657
658
659
660
661
662
663
664

		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
665
		int offs = get_ia32_am_offs_int(n);
666

Matthias Braun's avatar
Matthias Braun committed
667
		if (offs != 0) {
668
669
			/* omit explicit + if there was no base or index */
			if (! had_output) {
Matthias Braun's avatar
Matthias Braun committed
670
671
672
				obstack_printf(obst, "[%d", offs);
			} else {
				obstack_printf(obst, "%+d", offs);
673
			}
674

675
676
			had_output = 1;
		}
Christian Würdig's avatar
Christian Würdig committed
677
678
	}

679
680
	if (had_output)
		obstack_printf(obst, "] ");
Christian Würdig's avatar
Christian Würdig committed
681

682
683
	obstack_1grow(obst, '\0');
	s = obstack_finish(obst);
Christian Würdig's avatar
Christian Würdig committed
684
685
686
687

	return s;
}

688
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);
	const char *pref = pointer_size(mode, has_x87_register(irn));
Christian Würdig's avatar
Christian Würdig committed
697

698
699
700
	snprintf(buf, SNPRINTF_BUF_LEN, "%s %s", pref ? pref : "", adr);
	return buf;
}
Christian Würdig's avatar
Christian Würdig committed
701

Christian Würdig's avatar
Christian Würdig committed
702
703
704
/**
 * Formated print of commands and comments.
 */
Christian Würdig's avatar
Christian Würdig committed
705
706
707
708
709
710
711
712
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
713
714
715
716
}



Christian Würdig's avatar
Christian Würdig committed
717
/**
Christian Würdig's avatar
Christian Würdig committed
718
719
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
720
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
721
722
723
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
724
725
}

Christian Würdig's avatar
Christian Würdig committed
726

Christian Würdig's avatar
Christian Würdig committed
727

Christian Würdig's avatar
Christian Würdig committed
728
729
730
731
732
733
734
735
736
737
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
738
#undef IA32_DO_EMIT
Christian Würdig's avatar
Christian Würdig committed
739
#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
Christian Würdig's avatar
Christian Würdig committed
740

741
742
743
744
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
745
746
	const char *name;
	pn_Cmp      num;
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
};

/*
 * 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 */
762
763
764
765
766
767
  { "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 != */
768
769
770
771
772
773
774
  { 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
775
776
777
	{ NULL,              pn_Cmp_False },  /* always false */
	{ "e",               pn_Cmp_Eq },     /* == */
	{ "b",               pn_Cmp_Lt },     /* < */
Christian Würdig's avatar
Christian Würdig committed
778
	{ "be",              pn_Cmp_Le },     /* <= */
Christian Würdig's avatar
Christian Würdig committed
779
780
781
782
783
	{ "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 */
784
785
786
787
788
789
	{ "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 != */
Christian Würdig's avatar
Christian Würdig committed
790
	{ NULL,              pn_Cmp_True },   /* always true */
791
792
793
794
795
};

/*
 * returns the condition code
 */
Christian Würdig's avatar
Christian Würdig committed
796
static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
797
{
Christian Würdig's avatar
Christian Würdig committed
798
799
	assert(cmp2condition_s[cmp_code].num == cmp_code);
	assert(cmp2condition_u[cmp_code].num == cmp_code);
800

Christian Würdig's avatar
Christian Würdig committed
801
	return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
802
803
}

804
805
806
807
808
809
810
/**
 * 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
811
812
813
814
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
815
	ir_node *bl = get_cfop_target_block(irn);
816

817
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
818
819
	return buf;
}
820

821
822
/** Return the next block in Block schedule */
static ir_node *next_blk_sched(const ir_node *block) {
Michael Beck's avatar
Michael Beck committed
823
	return get_irn_link(block);
824
825
}

826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
/**
 * 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
848
849
850
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
851
static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
852
853
854
855
	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
856
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
857
858
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
859
	int is_unsigned;
860
861
	int pnc;
	int flipped = 0;
Christian Würdig's avatar
Christian Würdig committed
862

863
	/* get both Proj's */
864
865
	proj_true = get_proj(irn, pn_Cond_true);
	assert(proj_true && "CondJmp without true Proj");
Christian Würdig's avatar
Christian Würdig committed
866

867
868
869
870
	proj_false = get_proj(irn, pn_Cond_false);
	assert(proj_false && "CondJmp without false Proj");

	pnc = get_ia32_pncode(irn);
871
872
873

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
874
875

	/* we have a block schedule */
876
	next_block = next_blk_sched(block);
877

878
	if (get_cfop_target_block(proj_true) == next_block) {
879
		/* exchange both proj's so the second one can be omitted */
880
881
882
883
884
885
		const ir_node *t = proj_true;
		proj_true = proj_false;
		proj_false = t;

		flipped = 1;
		pnc = get_negated_pnc(pnc, mode);
886
887
888
	}

	/* the first Proj must always be created */
889
	is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
890
891
892
893
894
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
	         get_cmp_suffix(pnc, is_unsigned),
	         get_cfop_target(proj_true, buf));
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* %s(a, b) %s*/",
	         get_pnc_string(pnc), flipped ? "(was flipped)" : "");
Christian Würdig's avatar
Christian Würdig committed
895
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
896

897
	/* the second Proj might be a fallthrough */
898
899
	if (get_cfop_target_block(proj_false) != next_block) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj_false, buf));
900
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
Christian Würdig's avatar
Christian Würdig committed
901
	}
902
903
	else {
		cmd_buf[0] = '\0';
904
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(proj_false, buf));
905
906
	}
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
907
908
909
}

/**
Christian Würdig's avatar
Christian Würdig committed
910
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
911
 */
912
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
913
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
914
915
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
916

917
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
918
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
919
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
920
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
Christian Würdig's avatar
Christian Würdig committed
921
922
}

Christian Würdig's avatar
Christian Würdig committed
923
924
925
/**
 * Emits code for conditional jump with two variables.
 */
926
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
927
928
929
	CondJmp_emitter(irn, env);
}

930
931
932
933
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
934
935
936

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

Christian Würdig's avatar
Christian Würdig committed
937
	FILE       *F   = env->out;
Michael Beck's avatar
Michael Beck committed
938
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
939
	const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
Christian Würdig's avatar
Christian Würdig committed
940
941
	char        cmd_buf[SNPRINTF_BUF_LEN];
	char        cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
942

Christian Würdig's avatar
Christian Würdig committed
943
	if (! op2)
Michael Beck's avatar
Michael Beck committed
944
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
945

946
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
Christian Würdig's avatar
Christian Würdig committed
947
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
948

Christian Würdig's avatar
Christian Würdig committed
949
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
950
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
951
952

#undef IA32_IS_IMMOP
953
954
955
956
957
958
959
960
961
}

/**
 * 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);
}

962
963
964
965
966
967
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
968
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
Christian Würdig's avatar
Christian Würdig committed
969
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
970
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
971
}
972

973
974
975
976
977
978
979
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
980
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
981
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
982
}
Christian Würdig's avatar
Christian Würdig committed
983

Christian Würdig's avatar
Christian Würdig committed
984
985
986
987
988
989
990
991
992
993
994
/**
 * 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];

	lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", irn, ia32_emit_binop(irn, env));
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
	IA32_DO_EMIT(irn);
995
	finish_CondJmp(F, irn, mode_F);
Christian Würdig's avatar
Christian Würdig committed
996
997
998

}

Michael Beck's avatar
Michael Beck committed
999
1000
1001
/**
 * Emits code for conditional x87 floating point jump with two variables.
 */
1002
static void emit_ia32_x87CondJmp(ir_node *irn, ia32_emit_env_t *env) {
Michael Beck's avatar
Michael Beck committed
1003
1004
1005
1006
1007
1008
1009
1010
	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
1011
	switch (get_ia32_irn_opcode(irn)) {
Michael Beck's avatar
Michael Beck committed
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
	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)
Michael Beck's avatar
BugFix:    
Michael Beck committed
1032
		set_ia32_pncode(irn, (long)get_inversed_pnc(get_ia32_pncode(irn)));
Michael Beck's avatar
Michael Beck committed
1033

1034
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s%s", instr, reg[0] == '\0' ? "" : "%", reg);
Michael Beck's avatar
Michael Beck committed
1035
1036
1037
1038
1039
1040
1041
1042
1043
	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
1044
1045
	/* the compare flags must be evaluated using carry , ie unsigned */
	finish_CondJmp(F, irn, mode_Iu);
Michael Beck's avatar
Michael Beck committed
1046
1047
}

1048
static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1049
1050
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1051
1052
1053
	ir_mode    *mode       = get_irn_mode(get_irn_n(irn, 0));
	int        is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
	const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), is_unsigned);
Christian Würdig's avatar
Christian Würdig committed
1054
	int is_PsiCondCMov     = is_ia32_PsiCondCMov(irn);
Matthias Braun's avatar
Matthias Braun committed
1055
1056
	int idx_left  = 2 - is_PsiCondCMov;
	int idx_right = 3 - is_PsiCondCMov;
Christian Würdig's avatar
Christian Würdig committed
1057

1058
1059
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1060
1061
1062
	const arch_register_t *in1, *in2, *out;

	out = arch_get_irn_register(env->arch_env, irn);
Matthias Braun's avatar
Matthias Braun committed
1063
1064
	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
1065

Christian Würdig's avatar
Christian Würdig committed
1066
1067
	/* we have to emit the cmp first, because the destination register */
	/* could be one of the compare registers                           */
1068
	if (is_ia32_CmpCMov(irn)) {
1069
1070
1071
1072
1073
		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
1074
	else if (is_PsiCondCMov) {
1075
		/* omit compare because flags are already set by And/Or */
Matthias Braun's avatar
Matthias Braun committed
1076
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "test %1S, %1S", irn, irn);
1077
	}
1078
1079
1080
	else {
		assert(0 && "unsupported CMov");
	}
1081
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
Christian Würdig's avatar
Christian Würdig committed
1082
1083
	IA32_DO_EMIT(irn);

Christian Würdig's avatar
Christian Würdig committed
1084
1085
1086
1087
1088
	if (REGS_ARE_EQUAL(out, in2)) {
		/* best case: default in == out -> do nothing */
	}
	else if (REGS_ARE_EQUAL(out, in1)) {
		/* true in == out -> need complement compare and exchange true and default in */
Matthias Braun's avatar
Matthias Braun committed
1089
1090
1091
		ir_node *t = get_irn_n(irn, idx_left);
		set_irn_n(irn, idx_left, get_irn_n(irn, idx_right));
		set_irn_n(irn, idx_right, t);
Christian Würdig's avatar
Christian Würdig committed
1092

Matthias Braun's avatar
Matthias Braun committed
1093
		cmp_suffix  = get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), get_irn_mode(irn)), is_unsigned);
Christian Würdig's avatar
Christian Würdig committed
1094
1095
1096
1097

	}
	else {
		/* out is different from in: need copy default -> out */
Matthias Braun's avatar
Matthias Braun committed
1098
1099
1100
1101
1102
		if (is_PsiCondCMov)
			lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
		else
			lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %4S", irn, irn);

Christian Würdig's avatar
Christian Würdig committed
1103
1104
1105
		lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* copy default -> out */" );
		IA32_DO_EMIT(irn);
	}