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
45 #include "../besched.h"
46 #include "../beblocksched.h"
47 #include "../beirg_t.h"
48 #include "../begnuas.h"
50 #include "arm_emitter.h"
51 #include "gen_arm_emitter.h"
52 #include "arm_nodes_attr.h"
53 #include "arm_new_nodes.h"
54 #include "arm_map_regs.h"
55 #include "gen_arm_regalloc_if.h"
57 #include "../benode_t.h"
59 #define SNPRINTF_BUF_LEN 128
61 static const arch_env_t *arch_env = NULL;
64 * Returns the register at in position pos.
66 static const arch_register_t *get_in_reg(const arch_env_t *arch_env, const ir_node *irn, int pos) {
68 const arch_register_t *reg = NULL;
70 assert(get_irn_arity(irn) > pos && "Invalid IN position");
72 /* The out register of the operator at position pos is the
73 in register we need. */
74 op = get_irn_n(irn, pos);
76 reg = arch_get_irn_register(arch_env, op);
78 assert(reg && "no in register found");
84 * Returns the register at out position pos.
86 static const arch_register_t *get_out_reg(const arch_env_t *arch_env,
87 const ir_node *node, int pos)
90 const arch_register_t *reg = NULL;
92 /* 1st case: irn is not of mode_T, so it has only */
93 /* one OUT register -> good */
94 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
95 /* Proj with the corresponding projnum for the register */
97 if (get_irn_mode(node) != mode_T) {
98 reg = arch_get_irn_register(arch_env, node);
99 } else if (is_arm_irn(node)) {
100 reg = get_arm_out_reg(node, pos);
102 const ir_edge_t *edge;
104 foreach_out_edge(node, edge) {
105 proj = get_edge_src_irn(edge);
106 assert(is_Proj(proj) && "non-Proj from mode_T node");
107 if (get_Proj_proj(proj) == pos) {
108 reg = arch_get_irn_register(arch_env, proj);
114 assert(reg && "no out register found");
118 /*************************************************************
120 * (_) | | / _| | | | |
121 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
122 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
123 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
124 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
127 *************************************************************/
130 * Emits a block label from the given block.
132 static void arm_emit_block_label(arm_emit_env_t *env, const ir_node *block) {
133 be_emit_irprintf(env->emit, "BLOCK_%ld", get_irn_node_nr(block));
137 * Emit the name of the source register at given input position.
139 void arm_emit_source_register(arm_emit_env_t *env, const ir_node *node,
142 const arch_register_t *reg = get_in_reg(env->arch_env, node, pos);
143 be_emit_string(env->emit, arch_register_get_name(reg));
147 * Emit the name of the destination register at given output position.
149 void arm_emit_dest_register(arm_emit_env_t *env, const ir_node *node,
152 const arch_register_t *reg = get_out_reg(env->arch_env, node, pos);
153 be_emit_string(env->emit, arch_register_get_name(reg));
157 * Emit a node's offset.
159 void arm_emit_offset(arm_emit_env_t *env, const ir_node *node) {
161 ir_op *irn_op = get_irn_op(node);
163 if (irn_op == op_be_StackParam) {
164 ir_entity *ent = be_get_frame_entity(node);
165 offset = get_entity_offset(ent);
166 } else if (irn_op == op_be_Reload || irn_op == op_be_Spill) {
167 ir_entity *ent = be_get_frame_entity(node);
168 offset = get_entity_offset(ent);
169 } else if (irn_op == op_be_IncSP) {
170 offset = - be_get_IncSP_offset(node);
172 assert(!"unimplemented arm_emit_offset for this node type");
173 panic("unimplemented arm_emit_offset for this node type");
175 be_emit_irprintf(env->emit, "%d", offset);
179 * Emit the instruction suffix depending on the mode.
181 void arm_emit_mode(arm_emit_env_t *env, const ir_node *node) {
186 attr = get_arm_attr(node);
187 mode = attr->op_mode ? attr->op_mode : get_irn_mode(node);
188 bits = get_mode_size_bits(mode);
191 be_emit_char(env->emit, 's');
193 be_emit_char(env->emit, 'd');
195 be_emit_char(env->emit, 'e');
200 * Returns non-zero if a mode has a Immediate attribute.
202 int is_immediate_node(const ir_node *irn) {
203 arm_attr_t *attr = get_arm_attr(irn);
204 return ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM;
208 * Emit a const or SymConst value.
210 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
211 if (is_immediate_node(node)) {
212 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
213 } else if (is_arm_SymConst(node))
214 be_emit_string(env->emit, get_arm_symconst_label(node));
216 assert(!"not a Constant");
221 * Returns the tarval or offset of an arm node as a string.
223 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
224 arm_shift_modifier mod;
226 mod = get_arm_shift_modifier(node);
227 if (ARM_HAS_SHIFT(mod)) {
228 long v = get_tarval_long(get_arm_value(node));
230 be_emit_irprintf(env->emit, ", %s #%ld", arm_shf_mod_name(mod), v);
235 * Returns a unique label. This number will not be used a second time.
237 static unsigned get_unique_label(void) {
238 static unsigned id = 0;
245 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
246 SymConstEntry *entry = obstack_alloc(&env->obst, sizeof(*entry));
248 /* allocate a new symbol entry */
249 entry->label = get_unique_label();
250 entry->symconst = irn;
251 entry->next = env->symbols;
252 env->symbols = entry;
254 /* load the symbol indirect */
255 be_emit_cstring(env->emit, "\tldr ");
256 arm_emit_dest_register(env, irn, 0);
257 be_emit_irprintf(env->emit, ", .L%u", entry->label);
258 be_emit_finish_line_gas(env->emit, irn);
262 * Returns the next block in a block schedule.
264 static ir_node *sched_next_block(ir_node *block) {
265 return get_irn_link(block);
269 * Emit a conditional jump.
271 static void emit_arm_CondJmp(arm_emit_env_t *env, const ir_node *irn) {
272 const ir_edge_t *edge;
273 ir_node *true_block = NULL;
274 ir_node *false_block = NULL;
275 ir_node *op1 = get_irn_n(irn, 0);
276 ir_mode *opmode = get_irn_mode(op1);
278 int proj_num = get_arm_proj_num(irn);
280 foreach_out_edge(irn, edge) {
281 ir_node *proj = get_edge_src_irn(edge);
282 long nr = get_Proj_proj(proj);
283 ir_node *block = get_irn_link(proj);
284 if (nr == pn_Cond_true) {
291 if (proj_num == pn_Cmp_False) {
292 /* always false: should not happen */
293 be_emit_cstring(env->emit, "\tb ");
294 arm_emit_block_label(env, false_block);
295 be_emit_finish_line_gas(env->emit, irn);
296 } else if (proj_num == pn_Cmp_True) {
297 /* always true: should not happen */
298 be_emit_cstring(env->emit, "\tb ");
299 arm_emit_block_label(env, true_block);
300 be_emit_finish_line_gas(env->emit, irn);
302 ir_node *block = get_nodes_block(irn);
304 if (mode_is_float(opmode)) {
305 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
307 be_emit_cstring(env->emit, "\tfcmp ");
308 arm_emit_source_register(env, irn, 0);
309 be_emit_cstring(env->emit, ", ");
310 arm_emit_source_register(env, irn, 1);
311 be_emit_finish_line_gas(env->emit, irn);
313 be_emit_cstring(env->emit, "\tfmstat");
314 be_emit_pad_comment(env->emit);
315 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
316 be_emit_finish_line_gas(env->emit, NULL);
318 if (true_block == sched_next_block(block)) {
320 proj_num = get_negated_pnc(proj_num, opmode);
323 case pn_Cmp_Eq: suffix = "eq"; break;
324 case pn_Cmp_Lt: suffix = "lt"; break;
325 case pn_Cmp_Le: suffix = "le"; break;
326 case pn_Cmp_Gt: suffix = "gt"; break;
327 case pn_Cmp_Ge: suffix = "ge"; break;
328 case pn_Cmp_Lg: suffix = "ne"; break;
329 case pn_Cmp_Leg: suffix = "al"; break;
330 default: assert(!"Cmp unsupported"); suffix = "al";
332 be_emit_cstring(env->emit, "\tcmp ");
333 arm_emit_source_register(env, irn, 0);
334 be_emit_cstring(env->emit, ", ");
335 arm_emit_source_register(env, irn, 1);
336 be_emit_finish_line_gas(env->emit, irn);
339 if (true_block == sched_next_block(block)) {
340 be_emit_irprintf(env->emit, "\tb%s", suffix);
341 arm_emit_block_label(env, true_block);
342 be_emit_pad_comment(env->emit);
343 be_emit_cstring(env->emit, "/* false case */");
344 be_emit_finish_line_gas(env->emit, NULL);
346 be_emit_pad_comment(env->emit);
347 be_emit_cstring(env->emit, "/* fallthrough ");
348 arm_emit_block_label(env, false_block);
349 be_emit_cstring(env->emit, " */");
350 be_emit_finish_line_gas(env->emit, NULL);
352 be_emit_irprintf(env->emit, "\tb%s", suffix);
353 arm_emit_block_label(env, true_block);
354 be_emit_pad_comment(env->emit);
355 be_emit_cstring(env->emit, "/* true case */");
356 be_emit_finish_line_gas(env->emit, NULL);
358 if (false_block == sched_next_block(block)) {
359 be_emit_pad_comment(env->emit);
360 be_emit_cstring(env->emit, "/* fallthrough ");
361 arm_emit_block_label(env, false_block);
362 be_emit_cstring(env->emit, " */");
363 be_emit_finish_line_gas(env->emit, NULL);
365 be_emit_cstring(env->emit, "b ");
366 arm_emit_block_label(env, false_block);
367 be_emit_pad_comment(env->emit);
368 be_emit_cstring(env->emit, "/* false case */");
369 be_emit_finish_line_gas(env->emit, NULL);
376 * Create the CopyB instruction sequence.
378 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
379 unsigned int size = get_tarval_long(get_arm_value(irn));
381 be_emit_cstring(env->emit, "/* MemCopy (");
382 arm_emit_source_register(env, irn, 1);
383 be_emit_cstring(env->emit, ")->(");
384 arm_emit_source_register(env, irn, 0);
385 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
386 arm_emit_source_register(env, irn, 2);
387 be_emit_cstring(env->emit, ", ");
388 arm_emit_source_register(env, irn, 3);
389 be_emit_cstring(env->emit, ", ");
390 arm_emit_source_register(env, irn, 4);
391 be_emit_cstring(env->emit, ", and %r12 */");
392 be_emit_finish_line_gas(env->emit, NULL);
394 assert ( size > 0 && "CopyB needs size > 0" );
402 be_emit_cstring(env->emit, "\tldr %%r12, [");
403 arm_emit_source_register(env, irn, 1);
404 be_emit_cstring(env->emit, ", #0]!");
405 be_emit_finish_line_gas(env->emit, NULL);
407 be_emit_cstring(env->emit, "\tstr %%r12, [");
408 arm_emit_source_register(env, irn, 0);
409 be_emit_cstring(env->emit, ", #0]!");
410 be_emit_finish_line_gas(env->emit, irn);
413 be_emit_cstring(env->emit, "\tldmia ");
414 arm_emit_source_register(env, irn, 1);
415 be_emit_cstring(env->emit, "!, {%r12, ");
416 arm_emit_source_register(env, irn, 2);
417 be_emit_char(env->emit, '}');
418 be_emit_finish_line_gas(env->emit, NULL);
420 be_emit_cstring(env->emit, "\tstmia ");
421 arm_emit_source_register(env, irn, 0);
422 be_emit_cstring(env->emit, "!, {%r12, ");
423 arm_emit_source_register(env, irn, 2);
424 be_emit_char(env->emit, '}');
425 be_emit_finish_line_gas(env->emit, irn);
428 be_emit_cstring(env->emit, "\tldmia ");
429 arm_emit_source_register(env, irn, 1);
430 be_emit_cstring(env->emit, "!, {%r12, ");
431 arm_emit_source_register(env, irn, 2);
432 be_emit_cstring(env->emit, ", ");
433 arm_emit_source_register(env, irn, 3);
434 be_emit_char(env->emit, '}');
435 be_emit_finish_line_gas(env->emit, NULL);
437 be_emit_cstring(env->emit, "\tstmia ");
438 arm_emit_source_register(env, irn, 0);
439 be_emit_cstring(env->emit, "!, {%r12, ");
440 arm_emit_source_register(env, irn, 2);
441 be_emit_cstring(env->emit, ", ");
442 arm_emit_source_register(env, irn, 3);
443 be_emit_char(env->emit, '}');
444 be_emit_finish_line_gas(env->emit, irn);
449 be_emit_cstring(env->emit, "\tldmia ");
450 arm_emit_source_register(env, irn, 1);
451 be_emit_cstring(env->emit, "!, {%r12, ");
452 arm_emit_source_register(env, irn, 2);
453 be_emit_cstring(env->emit, ", ");
454 arm_emit_source_register(env, irn, 3);
455 be_emit_cstring(env->emit, ", ");
456 arm_emit_source_register(env, irn, 4);
457 be_emit_char(env->emit, '}');
458 be_emit_finish_line_gas(env->emit, NULL);
460 be_emit_cstring(env->emit, "\tstmia ");
461 arm_emit_source_register(env, irn, 0);
462 be_emit_cstring(env->emit, "!, {%r12, ");
463 arm_emit_source_register(env, irn, 2);
464 be_emit_cstring(env->emit, ", ");
465 arm_emit_source_register(env, irn, 3);
466 be_emit_cstring(env->emit, ", ");
467 arm_emit_source_register(env, irn, 4);
468 be_emit_char(env->emit, '}');
469 be_emit_finish_line_gas(env->emit, irn);
474 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
475 const ir_edge_t *edge;
481 ir_node *default_block = NULL;
483 block_nr = get_irn_node_nr(irn);
484 n_projs = get_arm_n_projs(irn);
486 projs = xcalloc(n_projs , sizeof(ir_node*));
488 foreach_out_edge(irn, edge) {
489 proj = get_edge_src_irn(edge);
490 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
492 if (get_Proj_proj(proj) == get_arm_default_proj_num(irn))
493 default_block = get_irn_link(proj);
495 projs[get_Proj_proj(proj)] = proj;
497 assert(default_block != NULL);
504 be_emit_cstring(env->emit, "\tcmp ");
505 arm_emit_source_register(env, irn, 0);
506 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
507 be_emit_finish_line_gas(env->emit, irn);
509 be_emit_cstring(env->emit, "\tbhi ");
510 arm_emit_block_label(env, default_block);
511 be_emit_finish_line_gas(env->emit, NULL);
514 LDR %r12, .TABLE_X_START
515 ADD %r12, %r12, [%1S, LSL #2]
519 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
520 be_emit_finish_line_gas(env->emit, NULL);
522 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
523 arm_emit_source_register(env, irn, 0);
524 be_emit_cstring(env->emit, ", LSL #2");
525 be_emit_finish_line_gas(env->emit, NULL);
527 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
528 be_emit_finish_line_gas(env->emit, NULL);
530 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
531 be_emit_finish_line_gas(env->emit, NULL);
532 be_emit_irprintf(env->emit, "\t.align 2");
533 be_emit_finish_line_gas(env->emit, NULL);
534 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
535 be_emit_finish_line_gas(env->emit, NULL);
537 for (i = 0; i < n_projs; ++i) {
541 block = get_irn_link(proj);
543 block = get_irn_link(projs[get_arm_default_proj_num(irn)]);
545 be_emit_cstring(env->emit, "\t.word\t");
546 arm_emit_block_label(env, block);
547 be_emit_finish_line_gas(env->emit, NULL);
549 be_emit_irprintf(env->emit, "\t.align 2\n");
550 be_emit_finish_line_gas(env->emit, NULL);
554 /************************************************************************/
556 /************************************************************************/
558 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
559 ir_entity *ent = be_Call_get_entity(irn);
561 be_emit_cstring(env->emit, "\tbl ");
563 mark_entity_visited(ent);
564 be_emit_ident(env->emit, get_entity_ld_ident(ent));
566 arm_emit_source_register(env, irn, be_pos_Call_ptr);
568 be_emit_finish_line_gas(env->emit, irn);
571 /** Emit an IncSP node */
572 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
573 int offs = be_get_IncSP_offset(irn);
576 be_emit_cstring(env->emit, "\tadd ");
577 arm_emit_dest_register(env, irn, 0);
578 be_emit_cstring(env->emit, ", ");
579 arm_emit_source_register(env, irn, 0);
580 be_emit_cstring(env->emit, ", #");
581 arm_emit_offset(env, irn);
583 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
584 arm_emit_offset(env, irn);
585 be_emit_cstring(env->emit,") */");
587 be_emit_finish_line_gas(env->emit, irn);
590 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
591 ir_mode *mode = get_irn_mode(irn);
593 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
594 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
595 arm_emit_source_register(env, irn, 0);
596 be_emit_cstring(env->emit, " -> ");
597 arm_emit_dest_register(env, irn, 0);
598 be_emit_finish_line_gas(env->emit, irn);
602 if (mode_is_float(mode)) {
603 if (USE_FPA(env->cg->isa)) {
604 be_emit_cstring(env->emit, "\tmvf");
605 arm_emit_mode(env, irn);
606 be_emit_char(env->emit, ' ');
607 arm_emit_dest_register(env, irn, 0);
608 be_emit_cstring(env->emit, ", ");
609 arm_emit_source_register(env, irn, 0);
610 be_emit_finish_line_gas(env->emit, irn);
612 assert(0 && "move not supported for this mode");
613 panic("emit_be_Copy: move not supported for this mode");
615 } else if (mode_is_numP(mode)) {
616 be_emit_cstring(env->emit, "\tmov ");
617 arm_emit_dest_register(env, irn, 0);
618 be_emit_cstring(env->emit, ", ");
619 arm_emit_source_register(env, irn, 0);
620 be_emit_finish_line_gas(env->emit, irn);
622 assert(0 && "move not supported for this mode");
623 panic("emit_be_Copy: move not supported for this mode");
628 * Emit code for a Spill.
630 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
631 ir_mode *mode = get_irn_mode(irn);
633 if (mode_is_float(mode)) {
634 if (USE_FPA(env->cg->isa)) {
635 be_emit_cstring(env->emit, "\tstf ");
637 assert(0 && "spill not supported for this mode");
638 panic("emit_be_Spill: spill not supported for this mode");
640 } else if (mode_is_dataM(mode)) {
641 be_emit_cstring(env->emit, "\tstr ");
643 assert(0 && "spill not supported for this mode");
644 panic("emit_be_Spill: spill not supported for this mode");
646 arm_emit_source_register(env, irn, 1);
647 be_emit_cstring(env->emit, ", [");
648 arm_emit_source_register(env, irn, 0);
649 be_emit_cstring(env->emit, ", #");
650 arm_emit_offset(env, irn);
651 be_emit_char(env->emit, ']');
652 be_emit_finish_line_gas(env->emit, irn);
656 * Emit code for a Reload.
658 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
659 ir_mode *mode = get_irn_mode(irn);
661 if (mode_is_float(mode)) {
662 if (USE_FPA(env->cg->isa)) {
663 be_emit_cstring(env->emit, "\tldf ");
665 assert(0 && "reload not supported for this mode");
666 panic("emit_be_Reload: reload not supported for this mode");
668 } else if (mode_is_dataM(mode)) {
669 be_emit_cstring(env->emit, "\tldr ");
671 assert(0 && "reload not supported for this mode");
672 panic("emit_be_Reload: reload not supported for this mode");
674 arm_emit_dest_register(env, irn, 0);
675 be_emit_cstring(env->emit, ", [");
676 arm_emit_source_register(env, irn, 0);
677 be_emit_cstring(env->emit, ", #");
678 arm_emit_offset(env, irn);
679 be_emit_char(env->emit, ']');
680 be_emit_finish_line_gas(env->emit, irn);
683 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
684 be_emit_cstring(env->emit, "\teor ");
685 arm_emit_source_register(env, irn, 0);
686 be_emit_cstring(env->emit, ", ");
687 arm_emit_source_register(env, irn, 0);
688 be_emit_cstring(env->emit, ", ");
689 arm_emit_source_register(env, irn, 1);
690 be_emit_finish_line_gas(env->emit, NULL);
692 be_emit_cstring(env->emit, "\teor ");
693 arm_emit_source_register(env, irn, 1);
694 be_emit_cstring(env->emit, ", ");
695 arm_emit_source_register(env, irn, 0);
696 be_emit_cstring(env->emit, ", ");
697 arm_emit_source_register(env, irn, 1);
698 be_emit_finish_line_gas(env->emit, NULL);
700 arm_emit_source_register(env, irn, 0);
701 be_emit_cstring(env->emit, ", ");
702 arm_emit_source_register(env, irn, 0);
703 be_emit_cstring(env->emit, ", ");
704 arm_emit_source_register(env, irn, 1);
705 be_emit_finish_line_gas(env->emit, irn);
708 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
709 ir_mode *mode = get_irn_mode(irn);
711 if (mode_is_float(mode)) {
712 if (USE_FPA(env->cg->isa)) {
713 be_emit_cstring(env->emit,"\tldf ");
715 assert(0 && "stackparam not supported for this mode");
716 panic("emit_be_StackParam: stackparam not supported for this mode");
719 be_emit_cstring(env->emit,"\tldr ");
721 arm_emit_dest_register(env, irn, 0);
722 be_emit_cstring(env->emit, ", [");
723 arm_emit_source_register(env, irn, 0);
724 be_emit_cstring(env->emit,", #");
725 arm_emit_offset(env, irn);
726 be_emit_finish_line_gas(env->emit, irn);
729 /************************************************************************/
731 /************************************************************************/
733 static void emit_Jmp(arm_emit_env_t *env, const ir_node *irn) {
734 const ir_edge_t *edge = get_irn_out_edge_first(irn);
735 ir_node *target_block = get_edge_src_irn(edge);
737 be_emit_cstring(env->emit, "\tb ");
738 arm_emit_block_label(env, target_block);
739 be_emit_finish_line_gas(env->emit, irn);
742 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
743 be_emit_cstring(env->emit, "\tstfd ");
744 arm_emit_source_register(env, irn, 0);
745 be_emit_cstring(env->emit, ", [sp, #-8]!");
746 be_emit_pad_comment(env->emit);
747 be_emit_cstring(env->emit, "/* Push fp to stack */");
748 be_emit_finish_line_gas(env->emit, NULL);
750 be_emit_cstring(env->emit, "\tldmfd sp!, {");
751 arm_emit_dest_register(env, irn, 1);
752 be_emit_cstring(env->emit, ", ");
753 arm_emit_dest_register(env, irn, 0);
754 be_emit_char(env->emit, '}');
755 be_emit_pad_comment(env->emit);
756 be_emit_cstring(env->emit, "/* Pop destination */");
757 be_emit_finish_line_gas(env->emit, irn);
760 /***********************************************************************************
763 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
764 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
765 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
766 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
768 ***********************************************************************************/
770 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
775 * The type of a emitter function.
777 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
780 * Set a node emitter. Make it a bit more type safe.
782 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
783 op->ops.generic = (op_func)arm_emit_node;
787 * Enters the emitter functions for handled nodes into the generic
788 * pointer of an opcode.
790 static void arm_register_emitters(void) {
792 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
793 #define EMIT(a) set_emitter(op_##a, emit_##a)
794 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
795 #define SILENCE(a) set_emitter(op_##a, emit_silence)
797 /* first clear the generic function pointer for all ops */
798 clear_irp_opcodes_generic_func();
800 /* register all emitter functions defined in spec */
801 arm_register_spec_emitters();
803 /* other emitter functions */
806 // ARM_EMIT(CopyB_i);
830 SILENCE(be_CopyKeep);
840 * Emits code for a node.
842 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
843 ir_op *op = get_irn_op(irn);
845 if (op->ops.generic) {
846 emit_func *emit = (emit_func *)op->ops.generic;
849 be_emit_cstring(env->emit, "\t/* TODO */");
850 be_emit_finish_line_gas(env->emit, irn);
855 * Walks over the nodes in a block connected by scheduling edges
856 * and emits code for each node.
858 void arm_gen_block(ir_node *block, void *ctx) {
859 arm_emit_env_t *env = ctx;
862 arm_emit_block_label(env, block);
863 be_emit_cstring(env->emit, ":\n");
864 be_emit_write_line(env->emit);
866 sched_foreach(block, irn) {
867 arm_emit_node(env, irn);
873 * Emits code for function start.
875 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
876 be_emit_env_t *eenv = env->emit;
877 ir_entity *ent = get_irg_entity(irg);
878 const char *irg_name = get_entity_ld_name(ent);
880 be_emit_write_line(eenv);
881 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
882 be_emit_cstring(eenv, "\t.align 2\n");
884 if (get_entity_visibility(ent) == visibility_external_visible)
885 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
886 be_emit_irprintf(eenv, "%s:\n", irg_name);
890 * Emits code for function end
892 void arm_emit_end(FILE *F, ir_graph *irg) {
893 fprintf(F, "\t.ident \"firmcc\"\n");
897 * Sets labels for control flow nodes (jump target)
898 * TODO: Jump optimization
900 void arm_gen_labels(ir_node *block, void *env) {
902 int n = get_Block_n_cfgpreds(block);
904 for (n--; n >= 0; n--) {
905 pred = get_Block_cfgpred(block, n);
906 set_irn_link(pred, block);
912 * Main driver. Emits the code for one routine.
914 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg)
916 SymConstEntry *entry;
917 arm_emit_env_t emit_env;
921 emit_env.emit = &cg->isa->emit;
922 emit_env.arch_env = cg->arch_env;
924 emit_env.symbols = NULL;
925 obstack_init(&emit_env.obst);
926 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
928 /* set the global arch_env (needed by print hooks) */
929 arch_env = cg->arch_env;
931 arm_register_emitters();
933 /* create the block schedule. For now, we don't need it earlier. */
934 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
936 arm_func_prolog(&emit_env, irg);
937 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
939 n = ARR_LEN(blk_sched);
940 for (i = 0; i < n;) {
941 ir_node *block, *next_bl;
943 block = blk_sched[i];
945 next_bl = i < n ? blk_sched[i] : NULL;
947 /* set here the link. the emitter expects to find the next block here */
948 set_irn_link(block, next_bl);
949 arm_gen_block(block, &emit_env);
952 /* emit SymConst values */
953 if (emit_env.symbols)
954 be_emit_cstring(emit_env.emit, "\t.align 2\n");
956 for (entry = emit_env.symbols; entry; entry = entry->next) {
957 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
958 be_emit_cstring(emit_env.emit, "\t.word\t");
959 arm_emit_immediate(&emit_env, entry->symconst);
960 be_emit_char(emit_env.emit, '\n');
961 be_emit_write_line(emit_env.emit);
964 obstack_free(&emit_env.obst, NULL);