2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * @author Oliver Richter, Tobias Gneist
46 #include "../besched.h"
47 #include "../beblocksched.h"
48 #include "../beirg_t.h"
49 #include "../begnuas.h"
51 #include "arm_emitter.h"
52 #include "gen_arm_emitter.h"
53 #include "arm_nodes_attr.h"
54 #include "arm_new_nodes.h"
55 #include "arm_map_regs.h"
56 #include "gen_arm_regalloc_if.h"
58 #include "../benode_t.h"
60 #define SNPRINTF_BUF_LEN 128
62 static const arch_env_t *arch_env = NULL;
65 * Returns the register at in position pos.
67 static const arch_register_t *get_in_reg(const arch_env_t *arch_env, const ir_node *irn, int pos) {
69 const arch_register_t *reg = NULL;
71 assert(get_irn_arity(irn) > pos && "Invalid IN position");
73 /* The out register of the operator at position pos is the
74 in register we need. */
75 op = get_irn_n(irn, pos);
77 reg = arch_get_irn_register(arch_env, op);
79 assert(reg && "no in register found");
85 * Returns the register at out position pos.
87 static const arch_register_t *get_out_reg(const arch_env_t *arch_env,
88 const ir_node *node, int pos)
91 const arch_register_t *reg = NULL;
93 /* 1st case: irn is not of mode_T, so it has only */
94 /* one OUT register -> good */
95 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
96 /* Proj with the corresponding projnum for the register */
98 if (get_irn_mode(node) != mode_T) {
99 reg = arch_get_irn_register(arch_env, node);
100 } else if (is_arm_irn(node)) {
101 reg = get_arm_out_reg(node, pos);
103 const ir_edge_t *edge;
105 foreach_out_edge(node, edge) {
106 proj = get_edge_src_irn(edge);
107 assert(is_Proj(proj) && "non-Proj from mode_T node");
108 if (get_Proj_proj(proj) == pos) {
109 reg = arch_get_irn_register(arch_env, proj);
115 assert(reg && "no out register found");
119 /*************************************************************
121 * (_) | | / _| | | | |
122 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
123 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
124 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
125 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
128 *************************************************************/
131 * Emits a block label from the given block.
133 static void arm_emit_block_label(arm_emit_env_t *env, const ir_node *block) {
134 be_emit_irprintf(env->emit, "BLOCK_%u", get_irn_node_nr(block));
138 * Emit the name of the source register at given input position.
140 void arm_emit_source_register(arm_emit_env_t *env, const ir_node *node, int pos) {
141 const arch_register_t *reg = get_in_reg(env->arch_env, node, pos);
142 be_emit_string(env->emit, arch_register_get_name(reg));
146 * Emit the name of the destination register at given output position.
148 void arm_emit_dest_register(arm_emit_env_t *env, const ir_node *node, int pos) {
149 const arch_register_t *reg = get_out_reg(env->arch_env, node, pos);
150 be_emit_string(env->emit, arch_register_get_name(reg));
154 * Emit a node's offset.
156 void arm_emit_offset(arm_emit_env_t *env, const ir_node *node) {
158 ir_op *irn_op = get_irn_op(node);
160 if (irn_op == op_be_StackParam) {
161 ir_entity *ent = be_get_frame_entity(node);
162 offset = get_entity_offset(ent);
163 } else if (irn_op == op_be_Reload || irn_op == op_be_Spill) {
164 ir_entity *ent = be_get_frame_entity(node);
165 offset = get_entity_offset(ent);
166 } else if (irn_op == op_be_IncSP) {
167 offset = - be_get_IncSP_offset(node);
169 assert(!"unimplemented arm_emit_offset for this node type");
170 panic("unimplemented arm_emit_offset for this node type");
172 be_emit_irprintf(env->emit, "%d", offset);
176 * Emit the instruction suffix depending on the mode.
178 void arm_emit_mode(arm_emit_env_t *env, const ir_node *node) {
183 attr = get_arm_attr(node);
184 mode = attr->op_mode ? attr->op_mode : get_irn_mode(node);
185 bits = get_mode_size_bits(mode);
188 be_emit_char(env->emit, 's');
190 be_emit_char(env->emit, 'd');
192 be_emit_char(env->emit, 'e');
197 * Returns non-zero if a mode has a Immediate attribute.
199 int is_immediate_node(const ir_node *irn) {
200 arm_attr_t *attr = get_arm_attr(irn);
201 return ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM;
205 * Emit a const or SymConst value.
207 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
208 if (is_immediate_node(node)) {
209 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
210 } else if (is_arm_SymConst(node))
211 be_emit_ident(env->emit, get_arm_symconst_id(node));
213 assert(!"not a Constant");
218 * Returns the tarval or offset of an arm node as a string.
220 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
221 arm_shift_modifier mod;
223 mod = get_arm_shift_modifier(node);
224 if (ARM_HAS_SHIFT(mod)) {
225 long v = get_tarval_long(get_arm_value(node));
227 be_emit_irprintf(env->emit, ", %s #%ld", arm_shf_mod_name(mod), v);
232 * Returns a unique label. This number will not be used a second time.
234 static unsigned get_unique_label(void) {
235 static unsigned id = 0;
242 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
243 ident *id = get_arm_symconst_id(irn);
244 pmap_entry *entry = pmap_find(env->symbols, id);
248 /* allocate a label */
249 label = get_unique_label();
250 pmap_insert(env->symbols, id, INT_TO_PTR(label));
252 label = PTR_TO_INT(entry->value);
255 /* load the symbol indirect */
256 be_emit_cstring(env->emit, "\tldr ");
257 arm_emit_dest_register(env, irn, 0);
258 be_emit_irprintf(env->emit, ", .L%u", label);
259 be_emit_finish_line_gas(env->emit, irn);
263 * Returns the next block in a block schedule.
265 static ir_node *sched_next_block(ir_node *block) {
266 return get_irn_link(block);
270 * Emit a conditional jump.
272 static void emit_arm_CondJmp(arm_emit_env_t *env, const ir_node *irn) {
273 const ir_edge_t *edge;
274 ir_node *true_block = NULL;
275 ir_node *false_block = NULL;
276 ir_node *op1 = get_irn_n(irn, 0);
277 ir_mode *opmode = get_irn_mode(op1);
279 int proj_num = get_arm_proj_num(irn);
281 foreach_out_edge(irn, edge) {
282 ir_node *proj = get_edge_src_irn(edge);
283 long nr = get_Proj_proj(proj);
284 ir_node *block = get_irn_link(proj);
285 if (nr == pn_Cond_true) {
292 if (proj_num == pn_Cmp_False) {
293 /* always false: should not happen */
294 be_emit_cstring(env->emit, "\tb ");
295 arm_emit_block_label(env, false_block);
296 be_emit_finish_line_gas(env->emit, irn);
297 } else if (proj_num == pn_Cmp_True) {
298 /* always true: should not happen */
299 be_emit_cstring(env->emit, "\tb ");
300 arm_emit_block_label(env, true_block);
301 be_emit_finish_line_gas(env->emit, irn);
303 ir_node *block = get_nodes_block(irn);
305 if (mode_is_float(opmode)) {
306 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
308 be_emit_cstring(env->emit, "\tfcmp ");
309 arm_emit_source_register(env, irn, 0);
310 be_emit_cstring(env->emit, ", ");
311 arm_emit_source_register(env, irn, 1);
312 be_emit_finish_line_gas(env->emit, irn);
314 be_emit_cstring(env->emit, "\tfmstat");
315 be_emit_pad_comment(env->emit);
316 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
317 be_emit_finish_line_gas(env->emit, NULL);
319 if (true_block == sched_next_block(block)) {
321 proj_num = get_negated_pnc(proj_num, opmode);
324 case pn_Cmp_Eq: suffix = "eq"; break;
325 case pn_Cmp_Lt: suffix = "lt"; break;
326 case pn_Cmp_Le: suffix = "le"; break;
327 case pn_Cmp_Gt: suffix = "gt"; break;
328 case pn_Cmp_Ge: suffix = "ge"; break;
329 case pn_Cmp_Lg: suffix = "ne"; break;
330 case pn_Cmp_Leg: suffix = "al"; break;
331 default: assert(!"Cmp unsupported"); suffix = "al";
333 be_emit_cstring(env->emit, "\tcmp ");
334 arm_emit_source_register(env, irn, 0);
335 be_emit_cstring(env->emit, ", ");
336 arm_emit_source_register(env, irn, 1);
337 be_emit_finish_line_gas(env->emit, irn);
340 if (true_block == sched_next_block(block)) {
341 be_emit_irprintf(env->emit, "\tb%s ", suffix);
342 arm_emit_block_label(env, true_block);
343 be_emit_pad_comment(env->emit);
344 be_emit_cstring(env->emit, "/* false case */");
345 be_emit_finish_line_gas(env->emit, NULL);
347 be_emit_pad_comment(env->emit);
348 be_emit_cstring(env->emit, "/* fallthrough ");
349 arm_emit_block_label(env, false_block);
350 be_emit_cstring(env->emit, " */");
351 be_emit_finish_line_gas(env->emit, NULL);
353 be_emit_irprintf(env->emit, "\tb%s ", suffix);
354 arm_emit_block_label(env, true_block);
355 be_emit_pad_comment(env->emit);
356 be_emit_cstring(env->emit, "/* true case */");
357 be_emit_finish_line_gas(env->emit, NULL);
359 if (false_block == sched_next_block(block)) {
360 be_emit_pad_comment(env->emit);
361 be_emit_cstring(env->emit, "/* fallthrough ");
362 arm_emit_block_label(env, false_block);
363 be_emit_cstring(env->emit, " */");
364 be_emit_finish_line_gas(env->emit, NULL);
366 be_emit_cstring(env->emit, "b ");
367 arm_emit_block_label(env, false_block);
368 be_emit_pad_comment(env->emit);
369 be_emit_cstring(env->emit, "/* false case */");
370 be_emit_finish_line_gas(env->emit, NULL);
377 * Create the CopyB instruction sequence.
379 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
380 unsigned int size = get_tarval_long(get_arm_value(irn));
382 be_emit_cstring(env->emit, "/* MemCopy (");
383 arm_emit_source_register(env, irn, 1);
384 be_emit_cstring(env->emit, ")->(");
385 arm_emit_source_register(env, irn, 0);
386 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
387 arm_emit_source_register(env, irn, 2);
388 be_emit_cstring(env->emit, ", ");
389 arm_emit_source_register(env, irn, 3);
390 be_emit_cstring(env->emit, ", ");
391 arm_emit_source_register(env, irn, 4);
392 be_emit_cstring(env->emit, ", and %r12 */");
393 be_emit_finish_line_gas(env->emit, NULL);
395 assert ( size > 0 && "CopyB needs size > 0" );
403 be_emit_cstring(env->emit, "\tldr %%r12, [");
404 arm_emit_source_register(env, irn, 1);
405 be_emit_cstring(env->emit, ", #0]!");
406 be_emit_finish_line_gas(env->emit, NULL);
408 be_emit_cstring(env->emit, "\tstr %%r12, [");
409 arm_emit_source_register(env, irn, 0);
410 be_emit_cstring(env->emit, ", #0]!");
411 be_emit_finish_line_gas(env->emit, irn);
414 be_emit_cstring(env->emit, "\tldmia ");
415 arm_emit_source_register(env, irn, 1);
416 be_emit_cstring(env->emit, "!, {%r12, ");
417 arm_emit_source_register(env, irn, 2);
418 be_emit_char(env->emit, '}');
419 be_emit_finish_line_gas(env->emit, NULL);
421 be_emit_cstring(env->emit, "\tstmia ");
422 arm_emit_source_register(env, irn, 0);
423 be_emit_cstring(env->emit, "!, {%r12, ");
424 arm_emit_source_register(env, irn, 2);
425 be_emit_char(env->emit, '}');
426 be_emit_finish_line_gas(env->emit, irn);
429 be_emit_cstring(env->emit, "\tldmia ");
430 arm_emit_source_register(env, irn, 1);
431 be_emit_cstring(env->emit, "!, {%r12, ");
432 arm_emit_source_register(env, irn, 2);
433 be_emit_cstring(env->emit, ", ");
434 arm_emit_source_register(env, irn, 3);
435 be_emit_char(env->emit, '}');
436 be_emit_finish_line_gas(env->emit, NULL);
438 be_emit_cstring(env->emit, "\tstmia ");
439 arm_emit_source_register(env, irn, 0);
440 be_emit_cstring(env->emit, "!, {%r12, ");
441 arm_emit_source_register(env, irn, 2);
442 be_emit_cstring(env->emit, ", ");
443 arm_emit_source_register(env, irn, 3);
444 be_emit_char(env->emit, '}');
445 be_emit_finish_line_gas(env->emit, irn);
450 be_emit_cstring(env->emit, "\tldmia ");
451 arm_emit_source_register(env, irn, 1);
452 be_emit_cstring(env->emit, "!, {%r12, ");
453 arm_emit_source_register(env, irn, 2);
454 be_emit_cstring(env->emit, ", ");
455 arm_emit_source_register(env, irn, 3);
456 be_emit_cstring(env->emit, ", ");
457 arm_emit_source_register(env, irn, 4);
458 be_emit_char(env->emit, '}');
459 be_emit_finish_line_gas(env->emit, NULL);
461 be_emit_cstring(env->emit, "\tstmia ");
462 arm_emit_source_register(env, irn, 0);
463 be_emit_cstring(env->emit, "!, {%r12, ");
464 arm_emit_source_register(env, irn, 2);
465 be_emit_cstring(env->emit, ", ");
466 arm_emit_source_register(env, irn, 3);
467 be_emit_cstring(env->emit, ", ");
468 arm_emit_source_register(env, irn, 4);
469 be_emit_char(env->emit, '}');
470 be_emit_finish_line_gas(env->emit, irn);
475 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
476 const ir_edge_t *edge;
482 ir_node *default_block = NULL;
484 block_nr = get_irn_node_nr(irn);
485 n_projs = get_arm_n_projs(irn);
487 projs = xcalloc(n_projs , sizeof(ir_node*));
489 foreach_out_edge(irn, edge) {
490 proj = get_edge_src_irn(edge);
491 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
493 if (get_Proj_proj(proj) == get_arm_default_proj_num(irn))
494 default_block = get_irn_link(proj);
496 projs[get_Proj_proj(proj)] = proj;
498 assert(default_block != NULL);
505 be_emit_cstring(env->emit, "\tcmp ");
506 arm_emit_source_register(env, irn, 0);
507 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
508 be_emit_finish_line_gas(env->emit, irn);
510 be_emit_cstring(env->emit, "\tbhi ");
511 arm_emit_block_label(env, default_block);
512 be_emit_finish_line_gas(env->emit, NULL);
515 LDR %r12, .TABLE_X_START
516 ADD %r12, %r12, [%1S, LSL #2]
520 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
521 be_emit_finish_line_gas(env->emit, NULL);
523 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
524 arm_emit_source_register(env, irn, 0);
525 be_emit_cstring(env->emit, ", LSL #2");
526 be_emit_finish_line_gas(env->emit, NULL);
528 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
529 be_emit_finish_line_gas(env->emit, NULL);
531 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
532 be_emit_finish_line_gas(env->emit, NULL);
533 be_emit_irprintf(env->emit, "\t.align 2");
534 be_emit_finish_line_gas(env->emit, NULL);
535 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
536 be_emit_finish_line_gas(env->emit, NULL);
538 for (i = 0; i < n_projs; ++i) {
542 block = get_irn_link(proj);
544 block = get_irn_link(projs[get_arm_default_proj_num(irn)]);
546 be_emit_cstring(env->emit, "\t.word\t");
547 arm_emit_block_label(env, block);
548 be_emit_finish_line_gas(env->emit, NULL);
550 be_emit_irprintf(env->emit, "\t.align 2\n");
551 be_emit_finish_line_gas(env->emit, NULL);
555 /************************************************************************/
557 /************************************************************************/
559 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
560 ir_entity *ent = be_Call_get_entity(irn);
562 be_emit_cstring(env->emit, "\tbl ");
564 mark_entity_visited(ent);
565 be_emit_ident(env->emit, get_entity_ld_ident(ent));
567 arm_emit_source_register(env, irn, be_pos_Call_ptr);
569 be_emit_finish_line_gas(env->emit, irn);
572 /** Emit an IncSP node */
573 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
574 int offs = be_get_IncSP_offset(irn);
577 be_emit_cstring(env->emit, "\tadd ");
578 arm_emit_dest_register(env, irn, 0);
579 be_emit_cstring(env->emit, ", ");
580 arm_emit_source_register(env, irn, 0);
581 be_emit_cstring(env->emit, ", #");
582 arm_emit_offset(env, irn);
584 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
585 arm_emit_offset(env, irn);
586 be_emit_cstring(env->emit,") */");
588 be_emit_finish_line_gas(env->emit, irn);
591 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
592 ir_mode *mode = get_irn_mode(irn);
594 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
595 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
596 arm_emit_source_register(env, irn, 0);
597 be_emit_cstring(env->emit, " -> ");
598 arm_emit_dest_register(env, irn, 0);
599 be_emit_finish_line_gas(env->emit, irn);
603 if (mode_is_float(mode)) {
604 if (USE_FPA(env->cg->isa)) {
605 be_emit_cstring(env->emit, "\tmvf");
606 arm_emit_mode(env, irn);
607 be_emit_char(env->emit, ' ');
608 arm_emit_dest_register(env, irn, 0);
609 be_emit_cstring(env->emit, ", ");
610 arm_emit_source_register(env, irn, 0);
611 be_emit_finish_line_gas(env->emit, irn);
613 assert(0 && "move not supported for this mode");
614 panic("emit_be_Copy: move not supported for this mode");
616 } else if (mode_is_numP(mode)) {
617 be_emit_cstring(env->emit, "\tmov ");
618 arm_emit_dest_register(env, irn, 0);
619 be_emit_cstring(env->emit, ", ");
620 arm_emit_source_register(env, irn, 0);
621 be_emit_finish_line_gas(env->emit, irn);
623 assert(0 && "move not supported for this mode");
624 panic("emit_be_Copy: move not supported for this mode");
629 * Emit code for a Spill.
631 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
632 ir_mode *mode = get_irn_mode(irn);
634 if (mode_is_float(mode)) {
635 if (USE_FPA(env->cg->isa)) {
636 be_emit_cstring(env->emit, "\tstf ");
638 assert(0 && "spill not supported for this mode");
639 panic("emit_be_Spill: spill not supported for this mode");
641 } else if (mode_is_dataM(mode)) {
642 be_emit_cstring(env->emit, "\tstr ");
644 assert(0 && "spill not supported for this mode");
645 panic("emit_be_Spill: spill not supported for this mode");
647 arm_emit_source_register(env, irn, 1);
648 be_emit_cstring(env->emit, ", [");
649 arm_emit_source_register(env, irn, 0);
650 be_emit_cstring(env->emit, ", #");
651 arm_emit_offset(env, irn);
652 be_emit_char(env->emit, ']');
653 be_emit_finish_line_gas(env->emit, irn);
657 * Emit code for a Reload.
659 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
660 ir_mode *mode = get_irn_mode(irn);
662 if (mode_is_float(mode)) {
663 if (USE_FPA(env->cg->isa)) {
664 be_emit_cstring(env->emit, "\tldf ");
666 assert(0 && "reload not supported for this mode");
667 panic("emit_be_Reload: reload not supported for this mode");
669 } else if (mode_is_dataM(mode)) {
670 be_emit_cstring(env->emit, "\tldr ");
672 assert(0 && "reload not supported for this mode");
673 panic("emit_be_Reload: reload not supported for this mode");
675 arm_emit_dest_register(env, irn, 0);
676 be_emit_cstring(env->emit, ", [");
677 arm_emit_source_register(env, irn, 0);
678 be_emit_cstring(env->emit, ", #");
679 arm_emit_offset(env, irn);
680 be_emit_char(env->emit, ']');
681 be_emit_finish_line_gas(env->emit, irn);
684 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
685 be_emit_cstring(env->emit, "\teor ");
686 arm_emit_source_register(env, irn, 0);
687 be_emit_cstring(env->emit, ", ");
688 arm_emit_source_register(env, irn, 0);
689 be_emit_cstring(env->emit, ", ");
690 arm_emit_source_register(env, irn, 1);
691 be_emit_finish_line_gas(env->emit, NULL);
693 be_emit_cstring(env->emit, "\teor ");
694 arm_emit_source_register(env, irn, 1);
695 be_emit_cstring(env->emit, ", ");
696 arm_emit_source_register(env, irn, 0);
697 be_emit_cstring(env->emit, ", ");
698 arm_emit_source_register(env, irn, 1);
699 be_emit_finish_line_gas(env->emit, NULL);
701 be_emit_cstring(env->emit, "\teor ");
702 arm_emit_source_register(env, irn, 0);
703 be_emit_cstring(env->emit, ", ");
704 arm_emit_source_register(env, irn, 0);
705 be_emit_cstring(env->emit, ", ");
706 arm_emit_source_register(env, irn, 1);
707 be_emit_finish_line_gas(env->emit, irn);
710 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
711 ir_mode *mode = get_irn_mode(irn);
713 if (mode_is_float(mode)) {
714 if (USE_FPA(env->cg->isa)) {
715 be_emit_cstring(env->emit,"\tldf ");
717 assert(0 && "stackparam not supported for this mode");
718 panic("emit_be_StackParam: stackparam not supported for this mode");
721 be_emit_cstring(env->emit,"\tldr ");
723 arm_emit_dest_register(env, irn, 0);
724 be_emit_cstring(env->emit, ", [");
725 arm_emit_source_register(env, irn, 0);
726 be_emit_cstring(env->emit,", #");
727 arm_emit_offset(env, irn);
728 be_emit_finish_line_gas(env->emit, irn);
731 /************************************************************************/
733 /************************************************************************/
735 static void emit_Jmp(arm_emit_env_t *env, const ir_node *irn) {
736 const ir_edge_t *edge = get_irn_out_edge_first(irn);
737 ir_node *target_block = get_edge_src_irn(edge);
738 ir_node *block = get_nodes_block(irn);
740 if (target_block == sched_next_block(block)) {
741 be_emit_pad_comment(env->emit);
742 be_emit_cstring(env->emit, "/* fallthrough ");
743 arm_emit_block_label(env, target_block);
744 be_emit_cstring(env->emit, " */");
745 be_emit_finish_line_gas(env->emit, NULL);
747 be_emit_cstring(env->emit, "\tb ");
748 arm_emit_block_label(env, target_block);
749 be_emit_finish_line_gas(env->emit, irn);
753 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
754 be_emit_cstring(env->emit, "\tstfd ");
755 arm_emit_source_register(env, irn, 0);
756 be_emit_cstring(env->emit, ", [sp, #-8]!");
757 be_emit_pad_comment(env->emit);
758 be_emit_cstring(env->emit, "/* Push fp to stack */");
759 be_emit_finish_line_gas(env->emit, NULL);
761 be_emit_cstring(env->emit, "\tldmfd sp!, {");
762 arm_emit_dest_register(env, irn, 1);
763 be_emit_cstring(env->emit, ", ");
764 arm_emit_dest_register(env, irn, 0);
765 be_emit_char(env->emit, '}');
766 be_emit_pad_comment(env->emit);
767 be_emit_cstring(env->emit, "/* Pop destination */");
768 be_emit_finish_line_gas(env->emit, irn);
771 /***********************************************************************************
774 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
775 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
776 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
777 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
779 ***********************************************************************************/
781 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
786 * The type of a emitter function.
788 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
791 * Set a node emitter. Make it a bit more type safe.
793 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
794 op->ops.generic = (op_func)arm_emit_node;
798 * Enters the emitter functions for handled nodes into the generic
799 * pointer of an opcode.
801 static void arm_register_emitters(void) {
803 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
804 #define EMIT(a) set_emitter(op_##a, emit_##a)
805 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
806 #define SILENCE(a) set_emitter(op_##a, emit_silence)
808 /* first clear the generic function pointer for all ops */
809 clear_irp_opcodes_generic_func();
811 /* register all emitter functions defined in spec */
812 arm_register_spec_emitters();
814 /* other emitter functions */
817 // ARM_EMIT(CopyB_i);
842 SILENCE(be_CopyKeep);
843 SILENCE(be_RegParams);
855 * Emits code for a node.
857 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
858 ir_op *op = get_irn_op(irn);
860 if (op->ops.generic) {
861 emit_func *emit = (emit_func *)op->ops.generic;
864 be_emit_cstring(env->emit, "\t/* TODO */");
865 be_emit_finish_line_gas(env->emit, irn);
870 * Walks over the nodes in a block connected by scheduling edges
871 * and emits code for each node.
873 void arm_gen_block(ir_node *block, void *ctx) {
874 arm_emit_env_t *env = ctx;
877 arm_emit_block_label(env, block);
878 be_emit_cstring(env->emit, ":\n");
879 be_emit_write_line(env->emit);
881 sched_foreach(block, irn) {
882 arm_emit_node(env, irn);
888 * Emits code for function start.
890 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
891 be_emit_env_t *eenv = env->emit;
892 ir_entity *ent = get_irg_entity(irg);
893 const char *irg_name = get_entity_ld_name(ent);
895 be_emit_write_line(eenv);
896 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
897 be_emit_cstring(eenv, "\t.align 2\n");
899 if (get_entity_visibility(ent) == visibility_external_visible)
900 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
901 be_emit_irprintf(eenv, "%s:\n", irg_name);
905 * Emits code for function end
907 void arm_emit_end(FILE *F, ir_graph *irg) {
908 fprintf(F, "\t.ident \"firmcc\"\n");
912 * Sets labels for control flow nodes (jump target)
913 * TODO: Jump optimization
915 void arm_gen_labels(ir_node *block, void *env) {
917 int n = get_Block_n_cfgpreds(block);
919 for (n--; n >= 0; n--) {
920 pred = get_Block_cfgpred(block, n);
921 set_irn_link(pred, block);
927 * Main driver. Emits the code for one routine.
929 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg)
931 arm_emit_env_t emit_env;
936 emit_env.emit = &cg->isa->emit;
937 emit_env.arch_env = cg->arch_env;
939 emit_env.symbols = pmap_create();
940 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
942 /* set the global arch_env (needed by print hooks) */
943 arch_env = cg->arch_env;
945 arm_register_emitters();
947 /* create the block schedule. For now, we don't need it earlier. */
948 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
950 arm_func_prolog(&emit_env, irg);
951 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
953 n = ARR_LEN(blk_sched);
954 for (i = 0; i < n;) {
955 ir_node *block, *next_bl;
957 block = blk_sched[i];
959 next_bl = i < n ? blk_sched[i] : NULL;
961 /* set here the link. the emitter expects to find the next block here */
962 set_irn_link(block, next_bl);
963 arm_gen_block(block, &emit_env);
966 /* emit SymConst values */
967 if (pmap_count(emit_env.symbols) > 0) {
968 be_emit_cstring(emit_env.emit, "\t.align 2\n");
970 pmap_foreach(emit_env.symbols, entry) {
971 ident *id = entry->key;
973 be_emit_irprintf(emit_env.emit, ".L%u:\n", PTR_TO_INT(entry->value));
974 be_emit_cstring(emit_env.emit, "\t.word\t");
975 be_emit_ident(emit_env.emit, id);
976 be_emit_char(emit_env.emit, '\n');
977 be_emit_write_line(emit_env.emit);
979 be_emit_char(emit_env.emit, '\n');
980 be_emit_write_line(emit_env.emit);
982 pmap_destroy(emit_env.symbols);