ia32_emitter.c 65.9 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
/*************************************************************
 *             _       _    __   _          _
 *            (_)     | |  / _| | |        | |
 *  _ __  _ __ _ _ __ | |_| |_  | |__   ___| |_ __   ___ _ __
 * | '_ \| '__| | '_ \| __|  _| | '_ \ / _ \ | '_ \ / _ \ '__|
 * | |_) | |  | | | | | |_| |   | | | |  __/ | |_) |  __/ |
 * | .__/|_|  |_|_| |_|\__|_|   |_| |_|\___|_| .__/ \___|_|
 * | |                                       | |
 * |_|                                       |_|
 *************************************************************/

Christian Würdig's avatar
Christian Würdig committed
131
132
133
134
135
136
137
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]);
}

138
139
140
/**
 * returns true if a node has x87 registers
 */
Christian Würdig's avatar
Christian Würdig committed
141
static INLINE int has_x87_register(const ir_node *n) {
142
	return is_irn_machine_user(n, 0);
143
144
}

Christian Würdig's avatar
Christian Würdig committed
145
146
147
/* 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;
148
149
}

Christian Würdig's avatar
Christian Würdig committed
150
151

/**
Christian Würdig's avatar
Christian Würdig committed
152
 * Returns the register at in position pos.
Christian Würdig's avatar
Christian Würdig committed
153
 */
Christian Würdig's avatar
Christian Würdig committed
154
static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
155
156
157
158
159
160
161
162
163
	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
164
	reg = arch_get_irn_register(arch_env, op);
Christian Würdig's avatar
Christian Würdig committed
165

Christian Würdig's avatar
Christian Würdig committed
166
	assert(reg && "no in register found");
167
168
169
170
171
172
173
174
175

	/* 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
176
177
178
179
180
181
	return reg;
}

/**
 * Returns the register at out position pos.
 */
Christian Würdig's avatar
Christian Würdig committed
182
static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
Christian Würdig's avatar
Christian Würdig committed
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
210
	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
211
212
213
	return reg;
}

Michael Beck's avatar
Michael Beck committed
214
215
216
217
218
enum io_direction {
  IN_REG,
  OUT_REG
};

Christian Würdig's avatar
Christian Würdig committed
219
220
221
/**
 * Returns the name of the in register at position pos.
 */
Michael Beck's avatar
Michael Beck committed
222
static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
Christian Würdig's avatar
Christian Würdig committed
223
224
	const arch_register_t *reg;

Michael Beck's avatar
Michael Beck committed
225
	if (in_out == IN_REG) {
Christian Würdig's avatar
Christian Würdig committed
226
		reg = get_in_reg(irn, pos);
227
228
229
230
231
232

		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
233
234
	}
	else {
Christian Würdig's avatar
Christian Würdig committed
235
		/* destination address mode nodes don't have outputs */
236
		if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
Christian Würdig's avatar
Christian Würdig committed
237
238
239
			return "MEM";
		}

Christian Würdig's avatar
Christian Würdig committed
240
		reg = get_out_reg(irn, pos);
241
242
		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
243
	}
244
	return arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
245
246
247
248
249
250
251
252
253
}

/**
 * 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;
254
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
255
256
	int         nr = occ->width - 1;

257
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
258
		return lc_appendable_snadd(app, "(null)", 6);
Christian Würdig's avatar
Christian Würdig committed
259

260
	buf = get_ia32_reg_name(irn, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
Christian Würdig's avatar
Christian Würdig committed
261

262
263
	/* append the stupid % to register names */
	lc_appendable_chadd(app, '%');
Christian Würdig's avatar
Christian Würdig committed
264
	return lc_appendable_snadd(app, buf, strlen(buf));
265
266
}

Michael Beck's avatar
Michael Beck committed
267
268
269
270
271
272
273
/**
 * 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;
274
	ir_node     *irn = arg->v_ptr;
Michael Beck's avatar
Michael Beck committed
275
276
277
	int         nr = occ->width - 1;
	ia32_attr_t *attr;

278
	if (! irn)
Michael Beck's avatar
Michael Beck committed
279
280
		return lc_appendable_snadd(app, "(null)", 6);

281
	attr = get_ia32_attr(irn);
Michael Beck's avatar
Michael Beck committed
282
	buf = attr->x87[nr]->name;
283
	lc_appendable_chadd(app, '%');
Michael Beck's avatar
Michael Beck committed
284
285
286
	return lc_appendable_snadd(app, buf, strlen(buf));
}

Christian Würdig's avatar
Christian Würdig committed
287
/**
288
 * Returns the tarval, offset or scale of an ia32 as a string.
Christian Würdig's avatar
Christian Würdig committed
289
290
291
292
293
 */
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;
294
	ir_node    *irn = arg->v_ptr;
Christian Würdig's avatar
Christian Würdig committed
295

296
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
297
298
		return lc_arg_append(app, occ, "(null)", 6);

299
	if (occ->conversion == 'C') {
300
		buf = get_ia32_cnst(irn);
Christian Würdig's avatar
Christian Würdig committed
301
	}
302
	else { /* 'O' */
303
		buf = get_ia32_am_offs(irn);
Christian Würdig's avatar
Christian Würdig committed
304
305
	}

Christian Würdig's avatar
Christian Würdig committed
306
	return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
Christian Würdig's avatar
Christian Würdig committed
307
308
309
310
311
312
313
314
}

/**
 * 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)
{
315
316
	ir_node *irn  = arg->v_ptr;
	ir_mode *mode = get_irn_mode(irn);
317
318

	if (mode == mode_T) {
Christian Würdig's avatar
Christian Würdig committed
319
320
321
		mode = get_ia32_res_mode(irn);
		if (! mode)
			mode = get_ia32_ls_mode(irn);
322
	}
Christian Würdig's avatar
Christian Würdig committed
323

324
	if (! irn)
Christian Würdig's avatar
Christian Würdig committed
325
326
		return lc_arg_append(app, occ, "(null)", 6);

Christian Würdig's avatar
Christian Würdig committed
327
328
329
330
331
332
	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
333
334
335
336
337
338
339
}

/**
 * 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
340
	static lc_arg_env_t *env = NULL;
Christian Würdig's avatar
Christian Würdig committed
341

Christian Würdig's avatar
Christian Würdig committed
342
343
344
	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
345
	static const lc_arg_handler_t ia32_x87_handler   = { ia32_get_arg_type, ia32_get_x87_name };
Christian Würdig's avatar
Christian Würdig committed
346

Christian Würdig's avatar
Christian Würdig committed
347
348
349
	if(env == NULL) {
		/* extend the firm printer */
		env = firm_get_arg_env();
Christian Würdig's avatar
Christian Würdig committed
350

351
352
353
354
355
		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
356
		lc_arg_register(env, "ia32:x87",  'X', &ia32_x87_handler);
Christian Würdig's avatar
Christian Würdig committed
357
	}
Christian Würdig's avatar
Christian Würdig committed
358

Christian Würdig's avatar
Christian Würdig committed
359
	return env;
Christian Würdig's avatar
Christian Würdig committed
360
361
}

362
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
363
364
365
366
367
368
	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
369
			return (char *)arch_register_get_name(reg);
Christian Würdig's avatar
Christian Würdig committed
370
371
372
	}
}

Christian Würdig's avatar
Christian Würdig committed
373
374
375
/**
 * Emits registers and/or address mode of a binary operation.
 */
376
const char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
377
	static char *buf = NULL;
Christian Würdig's avatar
Christian Würdig committed
378

Christian Würdig's avatar
Christian Würdig committed
379
	/* verify that this function is never called on non-AM supporting operations */
Christian Würdig's avatar
Christian Würdig committed
380
	//assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
Christian Würdig's avatar
Christian Würdig committed
381

382
383
384
385
#define PRODUCES_RESULT(n)   \
	(!(is_ia32_St(n)      || \
	is_ia32_Store8Bit(n)  || \
	is_ia32_CondJmp(n)    || \
Christian Würdig's avatar
Christian Würdig committed
386
	is_ia32_xCondJmp(n)   || \
387
388
	is_ia32_CmpSet(n)     || \
	is_ia32_xCmpSet(n)    || \
389
	is_ia32_SwitchJmp(n)))
Christian Würdig's avatar
Christian Würdig committed
390

Christian Würdig's avatar
Christian Würdig committed
391
392
393
394
395
396
397
398
399
	if (! buf) {
		buf = xcalloc(1, SNPRINTF_BUF_LEN);
	}
	else {
		memset(buf, 0, SNPRINTF_BUF_LEN);
	}

	switch(get_ia32_op_type(n)) {
		case ia32_Normal:
400
			if (is_ia32_ImmConst(n)) {
Christian Würdig's avatar
Christian Würdig committed
401
402
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
			}
403
404
405
			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
406
407
408
			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
409
				const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
Christian Würdig's avatar
Christian Würdig committed
410
				const arch_register_t *in;
Christian Würdig's avatar
Christian Würdig committed
411
				const char            *in_name;
Christian Würdig's avatar
Christian Würdig committed
412

Christian Würdig's avatar
Christian Würdig committed
413
414
415
				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
416

Christian Würdig's avatar
Christian Würdig committed
417
418
419
420
421
422
				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
423
424
425
			}
			break;
		case ia32_AddrModeS:
426
427
428
429
430
			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 {
431
432
433
434
				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
435
					lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, ia32_emit_am(n, env));
436
				}
437
			}
Christian Würdig's avatar
Christian Würdig committed
438
439
			break;
		case ia32_AddrModeD:
440
			if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
441
442
				lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
					ia32_emit_am(n, env),
443
444
					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
445
446
			}
			else {
Christian Würdig's avatar
Christian Würdig committed
447
448
449
				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
450
451
452
453
454
455
456
457

				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";
				}
458

Christian Würdig's avatar
Christian Würdig committed
459
				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
460
461
462
463
464
465
			}
			break;
		default:
			assert(0 && "unsupported op type");
	}

Christian Würdig's avatar
Christian Würdig committed
466
467
#undef PRODUCES_RESULT

Christian Würdig's avatar
Christian Würdig committed
468
469
470
	return buf;
}

471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
/**
 * 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;
}

497
498
499
/**
 * Emits registers and/or address mode of a binary operation.
 */
500
const char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
	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)) {
516
517
518
				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));
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
545
			}
			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
546
547
548
/**
 * Emits registers and/or address mode of a unary operation.
 */
549
const char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
550
551
552
553
554
555
556
557
558
559
560
	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:
561
562
563
564
			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
565
566
567
568
569
570
				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);
571
			}
Christian Würdig's avatar
Christian Würdig committed
572
			break;
573
574
		case ia32_AddrModeD:
			snprintf(buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
Christian Würdig's avatar
Christian Würdig committed
575
			break;
576
577
578
579
580
		case ia32_AddrModeS:
			/*
				Mulh is emitted via emit_unop
				imul [MEM]  means EDX:EAX <- EAX * [MEM]
			*/
581
			assert((is_ia32_Mulh(n) || is_ia32_MulS(n)) && "Only MulS and Mulh can have AM source as unop");
582
583
			lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
			break;
Christian Würdig's avatar
Christian Würdig committed
584
585
586
587
588
589
590
591
		default:
			assert(0 && "unsupported op type");
	}

	return buf;
}

/**
592
 * Emits address mode.
Christian Würdig's avatar
Christian Würdig committed
593
 */
594
const char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
595
596
	ia32_am_flavour_t am_flav    = get_ia32_am_flavour(n);
	int               had_output = 0;
597
598
	char              *s;
	const char        *p;
Christian Würdig's avatar
Christian Würdig committed
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
	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);

615
	p = pointer_size(mode, has_x87_register(n) || is_ia32_GetST0(n) || is_ia32_SetST0(n));
616
617
	if (p)
		obstack_printf(obst, "%s ", p);
Christian Würdig's avatar
Christian Würdig committed
618

619
620
621
622
623
624
	/* 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
625
626

	if (am_flav & ia32_B) {
627
		obstack_printf(obst, "[");
Christian Würdig's avatar
Christian Würdig committed
628
629
630
631
632
633
634
635
		lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
		had_output = 1;
	}

	if (am_flav & ia32_I) {
		if (had_output) {
			obstack_printf(obst, "+");
		}
636
637
638
		else {
			obstack_printf(obst, "[");
		}
Christian Würdig's avatar
Christian Würdig committed
639
640
641
642
643
644
645
646
647
648
649

		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) {
650
651
		s = get_ia32_am_offs(n);

652
653
654
655
656
657
658
		if (s) {
			/* omit explicit + if there was no base or index */
			if (! had_output) {
				obstack_printf(obst, "[");
				if (s[0] == '+')
					s++;
			}
659

660
661
662
			obstack_printf(obst, s);
			had_output = 1;
		}
Christian Würdig's avatar
Christian Würdig committed
663
664
	}

665
666
	if (had_output)
		obstack_printf(obst, "] ");
Christian Würdig's avatar
Christian Würdig committed
667

668
669
	obstack_1grow(obst, '\0');
	s = obstack_finish(obst);
Christian Würdig's avatar
Christian Würdig committed
670
671
672
673

	return s;
}

674
675
676
677
678
679
680
681
682
/**
 * 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
683

684
685
686
	snprintf(buf, SNPRINTF_BUF_LEN, "%s %s", pref ? pref : "", adr);
	return buf;
}
Christian Würdig's avatar
Christian Würdig committed
687

Christian Würdig's avatar
Christian Würdig committed
688
689
690
/**
 * Formated print of commands and comments.
 */
Christian Würdig's avatar
Christian Würdig committed
691
692
693
694
695
696
697
698
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
699
700
701
702
}



Christian Würdig's avatar
Christian Würdig committed
703
/**
Christian Würdig's avatar
Christian Würdig committed
704
705
 * Add a number to a prefix. This number will not be used a second time.
 */
Christian Würdig's avatar
Christian Würdig committed
706
static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
Christian Würdig's avatar
Christian Würdig committed
707
708
709
	static unsigned long id = 0;
	snprintf(buf, buflen, "%s%lu", prefix, ++id);
	return buf;
710
711
}

Christian Würdig's avatar
Christian Würdig committed
712

Christian Würdig's avatar
Christian Würdig committed
713

Christian Würdig's avatar
Christian Würdig committed
714
715
716
717
718
719
720
721
722
723
/*************************************************
 *                 _ _                         _
 *                (_) |                       | |
 *   ___ _ __ ___  _| |_    ___ ___  _ __   __| |
 *  / _ \ '_ ` _ \| | __|  / __/ _ \| '_ \ / _` |
 * |  __/ | | | | | | |_  | (_| (_) | | | | (_| |
 *  \___|_| |_| |_|_|\__|  \___\___/|_| |_|\__,_|
 *
 *************************************************/

Christian Würdig's avatar
Christian Würdig committed
724
#undef IA32_DO_EMIT
Christian Würdig's avatar
Christian Würdig committed
725
#define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
Christian Würdig's avatar
Christian Würdig committed
726

727
728
729
730
/*
 * coding of conditions
 */
struct cmp2conditon_t {
Christian Würdig's avatar
Christian Würdig committed
731
732
	const char *name;
	pn_Cmp      num;
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
};

/*
 * 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 */
748
749
750
751
752
753
  { "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 != */
754
755
756
757
758
759
760
  { 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
761
762
763
	{ NULL,              pn_Cmp_False },  /* always false */
	{ "e",               pn_Cmp_Eq },     /* == */
	{ "b",               pn_Cmp_Lt },     /* < */
Christian Würdig's avatar
Christian Würdig committed
764
	{ "be",              pn_Cmp_Le },     /* <= */
Christian Würdig's avatar
Christian Würdig committed
765
766
767
768
769
	{ "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 */
770
771
772
773
774
775
	{ "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
776
	{ NULL,              pn_Cmp_True },   /* always true */
777
778
779
780
781
};

/*
 * returns the condition code
 */
Christian Würdig's avatar
Christian Würdig committed
782
static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
783
{
Christian Würdig's avatar
Christian Würdig committed
784
785
	assert(cmp2condition_s[cmp_code].num == cmp_code);
	assert(cmp2condition_u[cmp_code].num == cmp_code);
786

Christian Würdig's avatar
Christian Würdig committed
787
	return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
788
789
}

790
791
792
793
794
795
796
/**
 * 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
797
798
799
800
/**
 * Returns the target label for a control flow node.
 */
static char *get_cfop_target(const ir_node *irn, char *buf) {
801
	ir_node *bl = get_cfop_target_block(irn);
802

803
	snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
Christian Würdig's avatar
Christian Würdig committed
804
805
	return buf;
}
806

807
808
/** Return the next block in Block schedule */
static ir_node *next_blk_sched(const ir_node *block) {
Michael Beck's avatar
Michael Beck committed
809
	return get_irn_link(block);
810
811
}

812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
/**
 * 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
834
835
836
/**
 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
 */
837
static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
838
839
840
841
	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
842
	char buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
843
844
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
845
	int is_unsigned;
846
847
	int pnc;
	int flipped = 0;
Christian Würdig's avatar
Christian Würdig committed
848

849
	/* get both Proj's */
850
851
	proj_true = get_proj(irn, pn_Cond_true);
	assert(proj_true && "CondJmp without true Proj");
Christian Würdig's avatar
Christian Würdig committed
852

853
854
855
856
	proj_false = get_proj(irn, pn_Cond_false);
	assert(proj_false && "CondJmp without false Proj");

	pnc = get_ia32_pncode(irn);
857
858
859

	/* for now, the code works for scheduled and non-schedules blocks */
	block = get_nodes_block(irn);
860
861

	/* we have a block schedule */
862
	next_block = next_blk_sched(block);
863

864
	if (get_cfop_target_block(proj_true) == next_block) {
865
		/* exchange both proj's so the second one can be omitted */
866
867
868
869
870
871
		const ir_node *t = proj_true;
		proj_true = proj_false;
		proj_false = t;

		flipped = 1;
		pnc = get_negated_pnc(pnc, mode);
872
873
874
	}

	/* the first Proj must always be created */
875
	is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
876
877
878
879
880
	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
881
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
882

883
	/* the second Proj might be a fallthrough */
884
885
	if (get_cfop_target_block(proj_false) != next_block) {
		snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj_false, buf));
886
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
Christian Würdig's avatar
Christian Würdig committed
887
	}
888
889
	else {
		cmd_buf[0] = '\0';
890
		snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(proj_false, buf));
891
892
	}
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
893
894
895
}

/**
Christian Würdig's avatar
Christian Würdig committed
896
 * Emits code for conditional jump.
Christian Würdig's avatar
Christian Würdig committed
897
 */
898
static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
899
	FILE *F = env->out;
Christian Würdig's avatar
Christian Würdig committed
900
901
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
902

903
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
Christian Würdig's avatar
Christian Würdig committed
904
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
Christian Würdig's avatar
Christian Würdig committed
905
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
906
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
Christian Würdig's avatar
Christian Würdig committed
907
908
}

Christian Würdig's avatar
Christian Würdig committed
909
910
911
/**
 * Emits code for conditional jump with two variables.
 */
912
static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
913
914
915
	CondJmp_emitter(irn, env);
}

916
917
918
919
/**
 * Emits code for conditional test and jump.
 */
static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
920
921
922

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

Christian Würdig's avatar
Christian Würdig committed
923
	FILE       *F   = env->out;
Michael Beck's avatar
Michael Beck committed
924
	const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
925
	const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
Christian Würdig's avatar
Christian Würdig committed
926
927
	char        cmd_buf[SNPRINTF_BUF_LEN];
	char        cmnt_buf[SNPRINTF_BUF_LEN];
Michael Beck's avatar
Michael Beck committed
928

Christian Würdig's avatar
Christian Würdig committed
929
	if (! op2)
Michael Beck's avatar
Michael Beck committed
930
		op2 = arch_register_get_name(get_in_reg(irn, 1));
Christian Würdig's avatar
Christian Würdig committed
931

932
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
Christian Würdig's avatar
Christian Würdig committed
933
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
934

Christian Würdig's avatar
Christian Würdig committed
935
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
936
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
937
938

#undef IA32_IS_IMMOP
939
940
941
942
943
944
945
946
947
}

/**
 * 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);
}

948
949
950
951
952
953
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
954
	lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
Christian Würdig's avatar
Christian Würdig committed
955
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
956
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
957
}
958

959
960
961
962
963
964
965
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
966
	IA32_DO_EMIT(irn);
Christian Würdig's avatar
Christian Würdig committed
967
	finish_CondJmp(F, irn, get_ia32_res_mode(irn));
968
}
Christian Würdig's avatar
Christian Würdig committed
969

Christian Würdig's avatar
Christian Würdig committed
970
971
972
973
974
975
976
977
978
979
980
/**
 * 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);
981
	finish_CondJmp(F, irn, mode_F);
Christian Würdig's avatar
Christian Würdig committed
982
983
984

}

Michael Beck's avatar
Michael Beck committed
985
986
987
/**
 * Emits code for conditional x87 floating point jump with two variables.
 */
988
static void emit_ia32_x87CondJmp(ir_node *irn, ia32_emit_env_t *env) {
Michael Beck's avatar
Michael Beck committed
989
990
991
992
993
994
995
996
	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
997
	switch (get_ia32_irn_opcode(irn)) {
Michael Beck's avatar
Michael Beck committed
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
	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
1018
		set_ia32_pncode(irn, (long)get_inversed_pnc(get_ia32_pncode(irn)));
Michael Beck's avatar
Michael Beck committed
1019

1020
	snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s%s", instr, reg[0] == '\0' ? "" : "%", reg);
Michael Beck's avatar
Michael Beck committed
1021
1022
1023
1024
1025
1026
1027
1028
1029
	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
1030
1031
	/* the compare flags must be evaluated using carry , ie unsigned */
	finish_CondJmp(F, irn, mode_Iu);
Michael Beck's avatar
Michael Beck committed
1032
1033
}

1034
static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1035
1036
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1037
1038
1039
	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
1040
	int is_PsiCondCMov     = is_ia32_PsiCondCMov(irn);
Matthias Braun's avatar
Matthias Braun committed
1041
1042
	int idx_left  = 2 - is_PsiCondCMov;
	int idx_right = 3 - is_PsiCondCMov;
Christian Würdig's avatar
Christian Würdig committed
1043

1044
1045
	char cmd_buf[SNPRINTF_BUF_LEN];
	char cmnt_buf[SNPRINTF_BUF_LEN];
Christian Würdig's avatar
Christian Würdig committed
1046
1047
1048
	const arch_register_t *in1, *in2, *out;

	out = arch_get_irn_register(env->arch_env, irn);
Matthias Braun's avatar
Matthias Braun committed
1049
1050
	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
1051

Christian Würdig's avatar
Christian Würdig committed
1052
1053
	/* we have to emit the cmp first, because the destination register */
	/* could be one of the compare registers                           */
1054
	if (is_ia32_CmpCMov(irn)) {
1055
1056
1057
1058
1059
		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
1060
	else if (is_PsiCondCMov) {
1061
		/* omit compare because flags are already set by And/Or */
Matthias Braun's avatar
Matthias Braun committed
1062
		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "test %1S, %1S", irn, irn);
1063
	}
1064
1065
1066
	else {
		assert(0 && "unsupported CMov");
	}
1067
	snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
Christian Würdig's avatar
Christian Würdig committed
1068
1069
	IA32_DO_EMIT(irn);

Christian Würdig's avatar
Christian Würdig committed
1070
1071
1072
1073
1074
	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
1075
1076
1077
		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
1078

Matthias Braun's avatar
Matthias Braun committed
1079
		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
1080
1081
1082
1083

	}
	else {
		/* out is different from in: need copy default -> out */
Matthias Braun's avatar
Matthias Braun committed
1084
1085
1086
1087
1088
		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
1089
1090
1091
		lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* copy default -> out */" );
		IA32_DO_EMIT(irn);
	}
1092

Matthias Braun's avatar
Matthias Braun committed
1093
1094
1095
1096
1097
	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
1098
1099
1100
1101
	lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* condition is true case */" );
	IA32_DO_EMIT(irn);
}

1102
static void emit_ia32_CmpCMov(ir_node *irn, ia32_emit_env_t *env) {
1103
1104
1105
	CMov_emitter(irn, env);
}

1106
1107
1108
1109
static void emit_ia32_PsiCondCMov(ir_node *irn, ia32_emit_env_t *env) {
	CMov_emitter(irn, env);
}

1110
1111
1112
1113
static void emit_ia32_xCmpCMov(ir_node *irn, ia32_emit_env_t *env) {
	CMov_emitter(irn, env);
}

1114
static void Set_emitter(ir_node *irn, ir_mode *mode, ia32_emit_env_t *env) {
Christian Würdig's avatar
Christian Würdig committed
1115
1116
	FILE               *F       = env->out;
	const lc_arg_env_t *arg_env = ia32_get_arg_env();
1117
1118