ia32_emitter.c 64.8 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"
Christian Würdig's avatar
Christian Würdig committed
23

24
#include "../besched_t.h"
Christian Würdig's avatar
Christian Würdig committed
25
#include "../benode_t.h"
Michael Beck's avatar
Michael Beck committed
26
#include "../beabi.h"
27
#include "../be_dbgout.h"
Christian Würdig's avatar
Christian Würdig committed
28

29
#include "ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
30
#include "gen_ia32_emitter.h"
Christian Würdig's avatar
Christian Würdig committed
31
#include "gen_ia32_regalloc_if.h"
32
33
#include "ia32_nodes_attr.h"
#include "ia32_new_nodes.h"
Christian Würdig's avatar
Christian Würdig committed
34
#include "ia32_map_regs.h"
Christian Würdig's avatar
Christian Würdig committed
35
#include "bearch_ia32_t.h"
Christian Würdig's avatar
Christian Würdig committed
36

37
#define BLOCK_PREFIX(x) ".L" x
Michael Beck's avatar
Michael Beck committed
38

Christian Würdig's avatar
Christian Würdig committed
39
40
#define SNPRINTF_BUF_LEN 128

41
/* global arch_env for lc_printf functions */
Christian Würdig's avatar
Christian Würdig committed
42
static const arch_env_t *arch_env = NULL;
43

Michael Beck's avatar
Michael Beck committed
44
45
46
47
48
49
50
51
/** 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;
52
	static const char *text[ASM_MAX][SECTION_MAX] = {
Michael Beck's avatar
Michael Beck committed
53
		{
Michael Beck's avatar
Michael Beck committed
54
55
56
57
			".section\t.text",
			".section\t.data",
			".section\t.rodata",
			".section\t.text",
Christian Würdig's avatar
Christian Würdig committed
58
59
			".section\t.tbss,\"awT\",@nobits",
			".section\t.ctors,\"aw\",@progbits"
Michael Beck's avatar
Michael Beck committed
60
61
		},
		{
Michael Beck's avatar
Michael Beck committed
62
63
64
65
			".section\t.text",
			".section\t.data",
			".section .rdata,\"dr\"",
			".section\t.text",
Christian Würdig's avatar
Christian Würdig committed
66
67
			".section\t.tbss,\"awT\",@nobits",
			".section\t.ctors,\"aw\",@progbits"
Michael Beck's avatar
Michael Beck committed
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
		}
	};

	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
84
	case SECTION_TLS:
Christian Würdig's avatar
Christian Würdig committed
85
	case SECTION_CTOR:
Michael Beck's avatar
Michael Beck committed
86
		fprintf(F, "\t%s\n", text[asm_flavour][sec]);
87
88
89
90
		break;

	default:
		break;
Michael Beck's avatar
Michael Beck committed
91
92
93
94
95
96
97
98
99
100
101
102
	}
}

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;
103
104
	default:
		break;
Michael Beck's avatar
Michael Beck committed
105
106
107
108
109
110
111
112
113
	}
}

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;
114
115
	default:
		break;
Michael Beck's avatar
Michael Beck committed
116
117
118
	}
}

Christian Würdig's avatar
Christian Würdig committed
119
120
121
122
123
124
125
126
127
128
129
/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

Christian Würdig's avatar
Christian Würdig committed
130
131
132
133
134
135
136
static INLINE int be_is_unknown_reg(const arch_register_t *reg) {
	return \
		REGS_ARE_EQUAL(reg, &ia32_gp_regs[REG_GP_UKNWN])   || \
		REGS_ARE_EQUAL(reg, &ia32_xmm_regs[REG_XMM_UKNWN]) || \
		REGS_ARE_EQUAL(reg, &ia32_vfp_regs[REG_VFP_UKNWN]);
}

137
138
139
/**
 * returns true if a node has x87 registers
 */
Christian Würdig's avatar
Christian Würdig committed
140
static INLINE int has_x87_register(const ir_node *n) {
141
	return is_irn_machine_user(n, 0);
142
143
}

Christian Würdig's avatar
Christian Würdig committed
144
145
146
/* 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;
147
148
}

Christian Würdig's avatar
Christian Würdig committed
149
150

/**
Christian Würdig's avatar
Christian Würdig committed
151
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
152
 */
Christian Würdig's avatar
Christian Würdig committed
153
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
154
155
156
157
158
159
160
161
162
	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
163
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
164

Christian Würdig's avatar
Christian Würdig committed
165
	assert(reg && "no in register found");
166
167
168
169
170
171
172
173
174

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

Christian Würdig's avatar
Christian Würdig committed
175
176
177
178
179
180
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
181
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
182
183
184
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
	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
210
211
212
	return reg;
}

Michael Beck's avatar
Michael Beck committed
213
214
215
216
217
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
218
219
220
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
221
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
222
223
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
224
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
225
		reg = get_in_reg(irn, pos);
226
227
228
229
230
231

		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
232
233
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
234
		/* destination address mode nodes don't have outputs */
235
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
236
237
238
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
239
		reg = get_out_reg(irn, pos);
240
241
		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
242
	}
243
	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
244
245
246
247
248
249
250
251
252
}

/**
 * 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;
253
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
254
255
	int         nr = occ->width - 1;

256
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
257
		return lc_appendable_snadd(app, "(null)", 6);
Christian Würdig's avatar
Christian Würdig committed
258

259
	buf = get_ia32_reg_name(irn, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
260

261
262
	/* append the stupid % to register names */
	lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
263
	return lc_appendable_snadd(app, buf, strlen(buf));
264
265
}

Michael Beck's avatar
Michael Beck committed
266
267
268
269
270
271
272
/**
 * 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;
273
	ir_node     *irn = arg->v_ptr;
Michael Beck's avatar
Michael Beck committed
274
275
276
	int         nr = occ->width - 1;
	ia32_attr_t *attr;

277
	if (! irn)
Michael Beck's avatar
Michael Beck committed
278
279
		return lc_appendable_snadd(app, "(null)", 6);

280
	attr = get_ia32_attr(irn);
Michael Beck's avatar
Michael Beck committed
281
	buf = attr->x87[nr]->name;
282
	lc_appendable_chadd(app, '%');
Michael Beck's avatar
Michael Beck committed
283
284
285
	return lc_appendable_snadd(app, buf, strlen(buf));
}

Christian Würdig's avatar
Christian Würdig committed
286
/**
287
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
288
289
290
291
292
 */
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;
293
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
294

295
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
296
297
		return lc_arg_append(app, occ, "(null)", 6);

298
	if (occ->conversion == 'C') {
299
		buf = get_ia32_cnst(irn);
Christian Würdig's avatar
Christian Würdig committed
300
	}
301
	else { /* 'O' */
302
		buf = get_ia32_am_offs(irn);
Christian Würdig's avatar
Christian Würdig committed
303
304
	}

Christian Würdig's avatar
Christian Würdig committed
305
	return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
306
307
308
309
310
311
312
313
}

/**
 * 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)
{
314
315
	ir_node *irn  = arg->v_ptr;
	ir_mode *mode = get_irn_mode(irn);
316
317

	if (mode == mode_T) {
Christian Würdig's avatar
Christian Würdig committed
318
319
320
		mode = get_ia32_res_mode(irn);
		if (! mode)
			mode = get_ia32_ls_mode(irn);
321
	}
Christian Würdig's avatar
Christian Würdig committed
322

323
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
324
325
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
326
327
328
329
330
331
	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
332
333
334
335
336
337
338
}

/**
 * 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
339
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
340

Christian Würdig's avatar
Christian Würdig committed
341
342
343
	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
344
	static const lc_arg_handler_t ia32_x87_handler   = { ia32_get_arg_type, ia32_get_x87_name };
Christian Würdig's avatar
Christian Würdig committed
345

Christian Würdig's avatar
Christian Würdig committed
346
347
348
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
349

350
351
352
353
354
		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
355
		lc_arg_register(env, "ia32:x87",  'X', &ia32_x87_handler);
Christian Würdig's avatar
Christian Würdig committed
356
	}
Christian Würdig's avatar
Christian Würdig committed
357

Christian Würdig's avatar
Christian Würdig committed
358
	return env;
Christian Würdig's avatar
Christian Würdig committed
359
360
}

361
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
362
363
364
365
366
367
	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
368
			return (char *)arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
369
370
371
	}
}

Christian Würdig's avatar
Christian Würdig committed
372
373
374
/**
 * Emits registers and/or address mode of a binary operation.
 */
375
const char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
376
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
377

Christian Würdig's avatar
Christian Würdig committed
378
	/* verify that this function is never called on non-AM supporting operations */
Christian Würdig's avatar
Christian Würdig committed
379
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
Christian Würdig's avatar
Christian Würdig committed
380

381
382
383
384
#define PRODUCES_RESULT(n)   \
	(!(is_ia32_St(n)      || \
	is_ia32_Store8Bit(n)  || \
	is_ia32_CondJmp(n)    || \
Christian Würdig's avatar
Christian Würdig committed
385
	is_ia32_xCondJmp(n)   || \
386
387
	is_ia32_CmpSet(n)     || \
	is_ia32_xCmpSet(n)    || \
388
	is_ia32_SwitchJmp(n)))
Christian Würdig's avatar
Christian Würdig committed
389

Christian Würdig's avatar
Christian Würdig committed
390
391
392
393
394
395
396
397
398
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
399
			if (is_ia32_ImmConst(n)) {
Christian Würdig's avatar
Christian Würdig committed
400
401
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
402
403
404
			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
405
406
407
			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
408
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
409
				const arch_register_t *in;
Christian Würdig's avatar
Christian Würdig committed
410
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
411

Christian Würdig's avatar
Christian Würdig committed
412
413
414
				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
415

Christian Würdig's avatar
Christian Würdig committed
416
417
418
419
420
421
				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
422
423
424
			}
			break;
		case ia32_AddrModeS:
425
426
427
428
429
			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 {
430
431
432
433
				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
434
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, ia32_emit_am(n, env));
435
				}
436
			}
Christian Würdig's avatar
Christian Würdig committed
437
438
			break;
		case ia32_AddrModeD:
439
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
440
441
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
					ia32_emit_am(n, env),
442
443
					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
444
445
			}
			else {
Christian Würdig's avatar
Christian Würdig committed
446
447
448
				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
449
450
451
452
453
454
455
456

				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";
				}
457

Christian Würdig's avatar
Christian Würdig committed
458
				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
459
460
461
462
463
464
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
465
466
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
467
468
469
	return buf;
}

470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
/**
 * 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;
}

496
497
498
/**
 * Emits registers and/or address mode of a binary operation.
 */
499
const char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
	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)) {
515
516
517
				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));
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
			}
			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
545
546
547
/**
 * Emits registers and/or address mode of a unary operation.
 */
548
const char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
549
550
551
552
553
554
555
556
557
558
559
	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:
560
561
562
563
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%C", n);
			}
			else {
Christian Würdig's avatar
Christian Würdig committed
564
565
566
567
568
569
				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);
				}
				else
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
570
			}
Christian Würdig's avatar
Christian Würdig committed
571
			break;
572
573
		case ia32_AddrModeD:
			snprintf(buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
574
			break;
575
576
577
578
579
		case ia32_AddrModeS:
			/*
				Mulh is emitted via emit_unop
				imul [MEM]  means EDX:EAX <- EAX * [MEM]
			*/
580
			assert((is_ia32_Mulh(n) || is_ia32_MulS(n)) && "Only MulS and Mulh can have AM source as unop");
581
582
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
			break;
Christian Würdig's avatar
Christian Würdig committed
583
584
585
586
587
588
589
590
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
591
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
592
 */
593
const char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
594
595
	ia32_am_flavour_t am_flav    = get_ia32_am_flavour(n);
	int               had_output = 0;
596
597
	char              *s;
	const char        *p;
Christian Würdig's avatar
Christian Würdig committed
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
	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);

614
	p = pointer_size(mode, has_x87_register(n) || is_ia32_GetST0(n) || is_ia32_SetST0(n));
615
616
	if (p)
		obstack_printf(obst, "%s ", p);
Christian Würdig's avatar
Christian Würdig committed
617

618
619
620
621
622
623
	/* 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
624
625

	if (am_flav & ia32_B) {
626
		obstack_printf(obst, "[");
Christian Würdig's avatar
Christian Würdig committed
627
628
629
630
631
632
633
634
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}
635
636
637
		else {
			obstack_printf(obst, "[");
		}
Christian Würdig's avatar
Christian Würdig committed
638
639
640
641
642
643
644
645
646
647
648

		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) {
649
650
		s = get_ia32_am_offs(n);

651
652
653
654
655
656
657
		if (s) {
			/* omit explicit + if there was no base or index */
			if (! had_output) {
				obstack_printf(obst, "[");
				if (s[0] == '+')
					s++;
			}
658

659
660
661
			obstack_printf(obst, s);
			had_output = 1;
		}
Christian Würdig's avatar
Christian Würdig committed
662
663
	}

664
665
	if (had_output)
		obstack_printf(obst, "] ");
Christian Würdig's avatar
Christian Würdig committed
666

667
668
	obstack_1grow(obst, '\0');
	s = obstack_finish(obst);
Christian Würdig's avatar
Christian Würdig committed
669
670
671
672

	return s;
}

673
674
675
676
677
678
679
680
681
/**
 * 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
682

683
684
685
	snprintf(buf, SNPRINTF_BUF_LEN, "%s %s", pref ? pref : "", adr);
	return buf;
}
Christian Würdig's avatar
Christian Würdig committed
686

Christian Würdig's avatar
Christian Würdig committed
687
688
689
/**
 * Formated print of commands and comments.
 */
Christian Würdig's avatar
Christian Würdig committed
690
691
692
693
694
695
696
697
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
698
699
700
701
}



Christian Würdig's avatar
Christian Würdig committed
702
/**
Christian Würdig's avatar
Christian Würdig committed
703
704
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
705
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
706
707
708
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
709
710
}

Christian Würdig's avatar
Christian Würdig committed
711

Christian Würdig's avatar
Christian Würdig committed
712

Christian Würdig's avatar
Christian Würdig committed
713
714
715
716
717
718
719
720
721
722
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
723
#undef IA32_DO_EMIT
Christian Würdig's avatar
Christian Würdig committed
724
#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
Christian Würdig's avatar
Christian Würdig committed
725

726
727
728
729
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
730
731
	const char *name;
	pn_Cmp      num;
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
};

/*
 * 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 */
747
748
749
750
751
752
  { "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 != */
753
754
755
756
757
758
759
  { 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
760
761
762
	{ NULL,              pn_Cmp_False },  /* always false */
	{ "e",               pn_Cmp_Eq },     /* == */
	{ "b",               pn_Cmp_Lt },     /* < */
Christian Würdig's avatar
Christian Würdig committed
763
	{ "be",              pn_Cmp_Le },     /* <= */
Christian Würdig's avatar
Christian Würdig committed
764
765
766
767
768
	{ "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 */
769
770
771
772
773
774
	{ "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
775
	{ NULL,              pn_Cmp_True },   /* always true */
776
777
778
779
780
};

/*
 * returns the condition code
 */
Christian Würdig's avatar
Christian Würdig committed
781
static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
782
{
Christian Würdig's avatar
Christian Würdig committed
783
784
	assert(cmp2condition_s[cmp_code].num == cmp_code);
	assert(cmp2condition_u[cmp_code].num == cmp_code);
785

Christian Würdig's avatar
Christian Würdig committed
786
	return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
787
788
}

789
790
791
792
793
794
795
/**
 * 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
796
797
798
799
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
800
	ir_node *bl = get_cfop_target_block(irn);
801

802
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
803
804
	return buf;
}
805

806
807
/** Return the next block in Block schedule */
static ir_node *next_blk_sched(const ir_node *block) {
Michael Beck's avatar
Michael Beck committed
808
	return get_irn_link(block);
809
810
}

811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
/**
 * 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
833
834
835
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
836
static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
837
838
839
840
	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
841
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
842
843
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
844
	int is_unsigned;
845
846
	int pnc;
	int flipped = 0;
Christian Würdig's avatar
Christian Würdig committed
847

848
	/* get both Proj's */
849
850
	proj_true = get_proj(irn, pn_Cond_true);
	assert(proj_true && "CondJmp without true Proj");
Christian Würdig's avatar
Christian Würdig committed
851

852
853
854
855
	proj_false = get_proj(irn, pn_Cond_false);
	assert(proj_false && "CondJmp without false Proj");

	pnc = get_ia32_pncode(irn);
856
857
858

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
859
860

	/* we have a block schedule */
861
	next_block = next_blk_sched(block);
862

863
	if (get_cfop_target_block(proj_true) == next_block) {
864
		/* exchange both proj's so the second one can be omitted */
865
866
867
868
869
870
		const ir_node *t = proj_true;
		proj_true = proj_false;
		proj_false = t;

		flipped = 1;
		pnc = get_negated_pnc(pnc, mode);
871
872
873
	}

	/* the first Proj must always be created */
874
	is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
875
876
877
878
879
	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
880
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
881

882
	/* the second Proj might be a fallthrough */
883
884
	if (get_cfop_target_block(proj_false) != next_block) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj_false, buf));
885
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
Christian Würdig's avatar
Christian Würdig committed
886
	}
887
888
	else {
		cmd_buf[0] = '\0';
889
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(proj_false, buf));
890
891
	}
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
892
893
894
}

/**
Christian Würdig's avatar
Christian Würdig committed
895
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
896
 */
897
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
898
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
899
900
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
901

902
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
903
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
904
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
905
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
Christian Würdig's avatar
Christian Würdig committed
906
907
}

Christian Würdig's avatar
Christian Würdig committed
908
909
910
/**
 * Emits code for conditional jump with two variables.
 */
911
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
912
913
914
	CondJmp_emitter(irn, env);
}

915
916
917
918
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
919
920
921

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

Christian Würdig's avatar
Christian Würdig committed
922
	FILE       *F   = env->out;
Michael Beck's avatar
Michael Beck committed
923
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
924
	const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
Christian Würdig's avatar
Christian Würdig committed
925
926
	char        cmd_buf[SNPRINTF_BUF_LEN];
	char        cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
927

Christian Würdig's avatar
Christian Würdig committed
928
	if (! op2)
Michael Beck's avatar
Michael Beck committed
929
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
930

931
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
Christian Würdig's avatar
Christian Würdig committed
932
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
933

Christian Würdig's avatar
Christian Würdig committed
934
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
935
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
936
937

#undef IA32_IS_IMMOP
938
939
940
941
942
943
944
945
946
}

/**
 * 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);
}

947
948
949
950
951
952
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
953
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
Christian Würdig's avatar
Christian Würdig committed
954
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
955
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
956
}
957

958
959
960
961
962
963
964
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
965
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
966
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
967
}
Christian Würdig's avatar
Christian Würdig committed
968

Christian Würdig's avatar
Christian Würdig committed
969
970
971
972
973
974
975
976
977
978
979
/**
 * 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);
980
	finish_CondJmp(F, irn, mode_F);
Christian Würdig's avatar
Christian Würdig committed
981
982
983

}

Michael Beck's avatar
Michael Beck committed
984
985
986
/**
 * Emits code for conditional x87 floating point jump with two variables.
 */
987
static void emit_ia32_x87CondJmp(ir_node *irn, ia32_emit_env_t *env) {
Michael Beck's avatar
Michael Beck committed
988
989
990
991
992
993
994
995
	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
996
	switch (get_ia32_irn_opcode(irn)) {
Michael Beck's avatar
Michael Beck committed
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
	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
1017
		set_ia32_pncode(irn, (long)get_inversed_pnc(get_ia32_pncode(irn)));
Michael Beck's avatar
Michael Beck committed
1018

1019
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s%s", instr, reg[0] == '\0' ? "" : "%", reg);
Michael Beck's avatar
Michael Beck committed
1020
1021
1022
1023
1024
1025
1026
1027
1028
	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
1029
1030
	/* the compare flags must be evaluated using carry , ie unsigned */
	finish_CondJmp(F, irn, mode_Iu);
Michael Beck's avatar
Michael Beck committed
1031
1032
}

1033
static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1034
1035
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1036
1037
1038
	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
1039
	int is_PsiCondCMov     = is_ia32_PsiCondCMov(irn);
Matthias Braun's avatar
Matthias Braun committed
1040
1041
	int idx_left  = 2 - is_PsiCondCMov;
	int idx_right = 3 - is_PsiCondCMov;
Christian Würdig's avatar
Christian Würdig committed
1042

1043
1044
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1045
1046
1047
	const arch_register_t *in1, *in2, *out;

	out = arch_get_irn_register(env->arch_env, irn);
Matthias Braun's avatar
Matthias Braun committed
1048
1049
	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
1050

Christian Würdig's avatar
Christian Würdig committed
1051
1052
	/* we have to emit the cmp first, because the destination register */
	/* could be one of the compare registers                           */
1053
	if (is_ia32_CmpCMov(irn)) {
1054
1055
1056
1057
1058
		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
1059
	else if (is_PsiCondCMov) {
1060
		/* omit compare because flags are already set by And/Or */
Matthias Braun's avatar
Matthias Braun committed
1061
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "test %1S, %1S", irn, irn);
1062
	}
1063
1064
1065
	else {
		assert(0 && "unsupported CMov");
	}
1066
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
Christian Würdig's avatar
Christian Würdig committed
1067
1068
	IA32_DO_EMIT(irn);

Christian Würdig's avatar
Christian Würdig committed
1069
1070
1071
1072
1073
	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
1074
1075
1076
		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
1077

Matthias Braun's avatar
Matthias Braun committed
1078
		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
1079
1080
1081
1082

	}
	else {
		/* out is different from in: need copy default -> out */
Matthias Braun's avatar
Matthias Braun committed
1083
1084
1085
1086
1087
		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
1088
1089
1090
		lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* copy default -> out */" );
		IA32_DO_EMIT(irn);
	}
1091

Matthias Braun's avatar
Matthias Braun committed
1092
1093
1094
1095
1096
	if (is_PsiCondCMov)
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmov%s %1D, %2S", cmp_suffix, irn, irn);
	else
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmov%s %1D, %3S", cmp_suffix, irn, irn);

Christian Würdig's avatar
Christian Würdig committed
1097
1098
1099
1100
	lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* condition is true case */" );
	IA32_DO_EMIT(irn);
}

1101
static void emit_ia32_CmpCMov(ir_node *irn, ia32_emit_env_t *env) {
1102
1103
1104
	CMov_emitter(irn, env);
}

1105
1106
1107
1108
static void emit_ia32_PsiCondCMov(ir_node *irn, ia32_emit_env_t *env) {
	CMov_emitter(irn, env);
}

1109
1110
1111
1112
static void emit_ia32_xCmpCMov(ir_node *irn, ia32_emit_env_t *env) {
	CMov_emitter(irn, env);
}

1113
static void Set_emitter(ir_node *irn, ir_mode *mode, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1114
1115
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1116
1117
	int        is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
	const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), is_unsigned);