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, Michael Beck
45 #include "raw_bitset.h"
47 #include "../besched.h"
48 #include "../beblocksched.h"
49 #include "../beirg_t.h"
50 #include "../begnuas.h"
52 #include "arm_emitter.h"
53 #include "gen_arm_emitter.h"
54 #include "arm_nodes_attr.h"
55 #include "arm_new_nodes.h"
56 #include "arm_map_regs.h"
57 #include "gen_arm_regalloc_if.h"
59 #include "../benode_t.h"
61 #define BLOCK_PREFIX ".L"
63 #define SNPRINTF_BUF_LEN 128
65 static const arch_env_t *arch_env = NULL;
68 * Returns the register at in position pos.
70 static const arch_register_t *get_in_reg(const arch_env_t *arch_env, const ir_node *irn, int pos) {
72 const arch_register_t *reg = NULL;
74 assert(get_irn_arity(irn) > pos && "Invalid IN position");
76 /* The out register of the operator at position pos is the
77 in register we need. */
78 op = get_irn_n(irn, pos);
80 reg = arch_get_irn_register(arch_env, op);
82 assert(reg && "no in register found");
84 /* in case of a joker register: just return a valid register */
85 if (arch_register_type_is(reg, joker)) {
86 const arch_register_req_t *req;
88 /* ask for the requirements */
89 req = arch_get_register_req(arch_env, irn, pos);
91 if (arch_register_req_is(req, limited)) {
92 /* in case of limited requirements: get the first allowed register */
93 unsigned idx = rbitset_next(req->limited, 0, 1);
94 reg = arch_register_for_index(req->cls, idx);
96 /* otherwise get first register in class */
97 reg = arch_register_for_index(req->cls, 0);
105 * Returns the register at out position pos.
107 static const arch_register_t *get_out_reg(const arch_env_t *arch_env,
108 const ir_node *node, int pos)
111 const arch_register_t *reg = NULL;
113 /* 1st case: irn is not of mode_T, so it has only */
114 /* one OUT register -> good */
115 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
116 /* Proj with the corresponding projnum for the register */
118 if (get_irn_mode(node) != mode_T) {
119 reg = arch_get_irn_register(arch_env, node);
120 } else if (is_arm_irn(node)) {
121 reg = get_arm_out_reg(node, pos);
123 const ir_edge_t *edge;
125 foreach_out_edge(node, edge) {
126 proj = get_edge_src_irn(edge);
127 assert(is_Proj(proj) && "non-Proj from mode_T node");
128 if (get_Proj_proj(proj) == pos) {
129 reg = arch_get_irn_register(arch_env, proj);
135 assert(reg && "no out register found");
139 /*************************************************************
141 * (_) | | / _| | | | |
142 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
143 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
144 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
145 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
148 *************************************************************/
151 * Emit the name of the source register at given input position.
153 void arm_emit_source_register(arm_emit_env_t *env, const ir_node *node, int pos) {
154 const arch_register_t *reg = get_in_reg(env->arch_env, node, pos);
155 be_emit_string(env->emit, arch_register_get_name(reg));
159 * Emit the name of the destination register at given output position.
161 void arm_emit_dest_register(arm_emit_env_t *env, const ir_node *node, int pos) {
162 const arch_register_t *reg = get_out_reg(env->arch_env, node, pos);
163 be_emit_string(env->emit, arch_register_get_name(reg));
167 * Emit a node's offset.
169 void arm_emit_offset(arm_emit_env_t *env, const ir_node *node) {
171 ir_op *irn_op = get_irn_op(node);
173 if (irn_op == op_be_StackParam) {
174 ir_entity *ent = be_get_frame_entity(node);
175 offset = get_entity_offset(ent);
176 } else if (irn_op == op_be_Reload || irn_op == op_be_Spill) {
177 ir_entity *ent = be_get_frame_entity(node);
178 offset = get_entity_offset(ent);
179 } else if (irn_op == op_be_IncSP) {
180 offset = - be_get_IncSP_offset(node);
182 assert(!"unimplemented arm_emit_offset for this node type");
183 panic("unimplemented arm_emit_offset for this node type");
185 be_emit_irprintf(env->emit, "%d", offset);
189 * Emit the arm fpa instruction suffix depending on the mode.
191 static void arm_emit_fpa_postfix(arm_emit_env_t *env, ir_mode *mode) {
192 int bits = get_mode_size_bits(mode);
194 be_emit_char(env->emit, 's');
196 be_emit_char(env->emit, 'd');
198 be_emit_char(env->emit, 'e');
202 * Emit the instruction suffix depending on the mode.
204 void arm_emit_mode(arm_emit_env_t *env, const ir_node *node) {
207 if (is_arm_irn(node)) {
208 const arm_attr_t *attr = get_arm_attr_const(node);
209 mode = attr->op_mode ? attr->op_mode : get_irn_mode(node);
211 mode = get_irn_mode(node);
213 arm_emit_fpa_postfix(env, mode);
218 * Returns non-zero if a mode has a Immediate attribute.
220 int is_immediate_node(const ir_node *irn) {
221 const arm_attr_t *attr = get_arm_attr_const(irn);
222 return ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM;
226 * Emit a const or SymConst value.
228 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
229 if (is_immediate_node(node)) {
230 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
231 } else if (is_arm_SymConst(node))
232 be_emit_ident(env->emit, get_arm_symconst_id(node));
234 assert(!"not a Constant");
239 * Returns the tarval or offset of an arm node as a string.
241 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
242 arm_shift_modifier mod;
244 mod = get_arm_shift_modifier(node);
245 if (ARM_HAS_SHIFT(mod)) {
246 long v = get_tarval_long(get_arm_value(node));
248 be_emit_irprintf(env->emit, ", %s #%l", arm_shf_mod_name(mod), v);
252 /** An entry in the sym_or_tv set. */
253 typedef struct sym_or_tv {
255 ident *id; /**< An ident. */
256 tarval *tv; /**< A tarval. */
257 const void *generic; /**< For generic compare. */
259 unsigned label; /**< the associated label. */
260 char is_ident; /**< Non-zero if an ident is stored. */
264 * Returns a unique label. This number will not be used a second time.
266 static unsigned get_unique_label(void) {
267 static unsigned id = 0;
274 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
275 sym_or_tv key, *entry;
278 key.u.id = get_arm_symconst_id(irn);
281 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
282 if (entry->label == 0) {
283 /* allocate a label */
284 entry->label = get_unique_label();
286 label = entry->label;
288 /* load the symbol indirect */
289 be_emit_cstring(env->emit, "\tldr ");
290 arm_emit_dest_register(env, irn, 0);
291 be_emit_irprintf(env->emit, ", .L%u", label);
292 be_emit_finish_line_gas(env->emit, irn);
296 * Emit a floating point fpa constant.
298 static void emit_arm_fpaConst(arm_emit_env_t *env, const ir_node *irn) {
299 sym_or_tv key, *entry;
303 key.u.tv = get_arm_value(irn);
306 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
307 if (entry->label == 0) {
308 /* allocate a label */
309 entry->label = get_unique_label();
311 label = entry->label;
313 /* load the tarval indirect */
314 mode = get_irn_mode(irn);
315 be_emit_cstring(env->emit, "\tldf");
316 arm_emit_fpa_postfix(env, mode);
317 be_emit_char(env->emit, ' ');
319 arm_emit_dest_register(env, irn, 0);
320 be_emit_irprintf(env->emit, ", .L%u", label);
321 be_emit_finish_line_gas(env->emit, irn);
325 * Returns the next block in a block schedule.
327 static ir_node *sched_next_block(const ir_node *block) {
328 return get_irn_link(block);
332 * Returns the target block for a control flow node.
334 static ir_node *get_cfop_target_block(const ir_node *irn) {
335 return get_irn_link(irn);
339 * Emits a block label for the given block.
341 static void arm_emit_block_name(be_emit_env_t *emit, const ir_node *block) {
342 be_emit_cstring(emit, BLOCK_PREFIX);
343 be_emit_irprintf(emit, "%d", get_irn_node_nr(block));
347 * Emit the target label for a control flow node.
349 static void arm_emit_cfop_target(be_emit_env_t *emit, const ir_node *irn) {
350 ir_node *block = get_cfop_target_block(irn);
352 arm_emit_block_name(emit, block);
356 * Emit a conditional jump.
358 static void emit_arm_CondJmp(arm_emit_env_t *env, const ir_node *irn) {
359 const ir_edge_t *edge;
360 const ir_node *proj_true = NULL;
361 const ir_node *proj_false = NULL;
362 const ir_node *block;
363 const ir_node *next_block;
364 ir_node *op1 = get_irn_n(irn, 0);
365 ir_mode *opmode = get_irn_mode(op1);
367 int proj_num = get_arm_CondJmp_proj_num(irn);
369 foreach_out_edge(irn, edge) {
370 ir_node *proj = get_edge_src_irn(edge);
371 long nr = get_Proj_proj(proj);
372 if (nr == pn_Cond_true) {
379 /* for now, the code works for scheduled and non-schedules blocks */
380 block = get_nodes_block(irn);
382 /* we have a block schedule */
383 next_block = sched_next_block(block);
385 if (proj_num == pn_Cmp_False) {
386 /* always false: should not happen */
387 be_emit_cstring(env->emit, "\tb ");
388 arm_emit_cfop_target(env->emit, proj_false);
389 be_emit_finish_line_gas(env->emit, proj_false);
390 } else if (proj_num == pn_Cmp_True) {
391 /* always true: should not happen */
392 be_emit_cstring(env->emit, "\tb ");
393 arm_emit_cfop_target(env->emit, proj_true);
394 be_emit_finish_line_gas(env->emit, proj_true);
396 ir_node *block = get_nodes_block(irn);
398 if (mode_is_float(opmode)) {
399 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
401 be_emit_cstring(env->emit, "\tfcmp ");
402 arm_emit_source_register(env, irn, 0);
403 be_emit_cstring(env->emit, ", ");
404 arm_emit_source_register(env, irn, 1);
405 be_emit_finish_line_gas(env->emit, irn);
407 be_emit_cstring(env->emit, "\tfmstat");
408 be_emit_pad_comment(env->emit);
409 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
410 be_emit_finish_line_gas(env->emit, NULL);
412 if (get_cfop_target_block(proj_true) == next_block) {
413 /* exchange both proj's so the second one can be omitted */
414 const ir_node *t = proj_true;
416 proj_true = proj_false;
418 proj_num = get_negated_pnc(proj_num, mode_Iu);
421 case pn_Cmp_Eq: suffix = "eq"; break;
422 case pn_Cmp_Lt: suffix = "lt"; break;
423 case pn_Cmp_Le: suffix = "le"; break;
424 case pn_Cmp_Gt: suffix = "gt"; break;
425 case pn_Cmp_Ge: suffix = "ge"; break;
426 case pn_Cmp_Lg: suffix = "ne"; break;
427 case pn_Cmp_Leg: suffix = "al"; break;
428 default: assert(!"Cmp unsupported"); suffix = "al";
430 be_emit_cstring(env->emit, "\tcmp ");
431 arm_emit_source_register(env, irn, 0);
432 be_emit_cstring(env->emit, ", ");
433 arm_emit_source_register(env, irn, 1);
434 be_emit_finish_line_gas(env->emit, irn);
437 /* emit the true proj */
438 be_emit_irprintf(env->emit, "\tb%s ", suffix);
439 arm_emit_cfop_target(env->emit, proj_true);
440 be_emit_finish_line_gas(env->emit, proj_true);
442 if (get_cfop_target_block(proj_false) == next_block) {
443 be_emit_cstring(env->emit, "\t/* fallthrough to ");
444 arm_emit_cfop_target(env->emit, proj_false);
445 be_emit_cstring(env->emit, " */");
446 be_emit_finish_line_gas(env->emit, proj_false);
448 be_emit_cstring(env->emit, "b ");
449 arm_emit_cfop_target(env->emit, proj_false);
450 be_emit_finish_line_gas(env->emit, proj_false);
456 * Create the CopyB instruction sequence.
458 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
459 unsigned int size = get_tarval_long(get_arm_value(irn));
461 be_emit_cstring(env->emit, "/* MemCopy (");
462 arm_emit_source_register(env, irn, 1);
463 be_emit_cstring(env->emit, ")->(");
464 arm_emit_source_register(env, irn, 0);
465 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
466 arm_emit_source_register(env, irn, 2);
467 be_emit_cstring(env->emit, ", ");
468 arm_emit_source_register(env, irn, 3);
469 be_emit_cstring(env->emit, ", ");
470 arm_emit_source_register(env, irn, 4);
471 be_emit_cstring(env->emit, ", and %r12 */");
472 be_emit_finish_line_gas(env->emit, NULL);
474 assert ( size > 0 && "CopyB needs size > 0" );
482 be_emit_cstring(env->emit, "\tldr %%r12, [");
483 arm_emit_source_register(env, irn, 1);
484 be_emit_cstring(env->emit, ", #0]!");
485 be_emit_finish_line_gas(env->emit, NULL);
487 be_emit_cstring(env->emit, "\tstr %%r12, [");
488 arm_emit_source_register(env, irn, 0);
489 be_emit_cstring(env->emit, ", #0]!");
490 be_emit_finish_line_gas(env->emit, irn);
493 be_emit_cstring(env->emit, "\tldmia ");
494 arm_emit_source_register(env, irn, 1);
495 be_emit_cstring(env->emit, "!, {%r12, ");
496 arm_emit_source_register(env, irn, 2);
497 be_emit_char(env->emit, '}');
498 be_emit_finish_line_gas(env->emit, NULL);
500 be_emit_cstring(env->emit, "\tstmia ");
501 arm_emit_source_register(env, irn, 0);
502 be_emit_cstring(env->emit, "!, {%r12, ");
503 arm_emit_source_register(env, irn, 2);
504 be_emit_char(env->emit, '}');
505 be_emit_finish_line_gas(env->emit, irn);
508 be_emit_cstring(env->emit, "\tldmia ");
509 arm_emit_source_register(env, irn, 1);
510 be_emit_cstring(env->emit, "!, {%r12, ");
511 arm_emit_source_register(env, irn, 2);
512 be_emit_cstring(env->emit, ", ");
513 arm_emit_source_register(env, irn, 3);
514 be_emit_char(env->emit, '}');
515 be_emit_finish_line_gas(env->emit, NULL);
517 be_emit_cstring(env->emit, "\tstmia ");
518 arm_emit_source_register(env, irn, 0);
519 be_emit_cstring(env->emit, "!, {%r12, ");
520 arm_emit_source_register(env, irn, 2);
521 be_emit_cstring(env->emit, ", ");
522 arm_emit_source_register(env, irn, 3);
523 be_emit_char(env->emit, '}');
524 be_emit_finish_line_gas(env->emit, irn);
529 be_emit_cstring(env->emit, "\tldmia ");
530 arm_emit_source_register(env, irn, 1);
531 be_emit_cstring(env->emit, "!, {%r12, ");
532 arm_emit_source_register(env, irn, 2);
533 be_emit_cstring(env->emit, ", ");
534 arm_emit_source_register(env, irn, 3);
535 be_emit_cstring(env->emit, ", ");
536 arm_emit_source_register(env, irn, 4);
537 be_emit_char(env->emit, '}');
538 be_emit_finish_line_gas(env->emit, NULL);
540 be_emit_cstring(env->emit, "\tstmia ");
541 arm_emit_source_register(env, irn, 0);
542 be_emit_cstring(env->emit, "!, {%r12, ");
543 arm_emit_source_register(env, irn, 2);
544 be_emit_cstring(env->emit, ", ");
545 arm_emit_source_register(env, irn, 3);
546 be_emit_cstring(env->emit, ", ");
547 arm_emit_source_register(env, irn, 4);
548 be_emit_char(env->emit, '}');
549 be_emit_finish_line_gas(env->emit, irn);
554 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
555 const ir_edge_t *edge;
561 ir_node *default_proj = NULL;
563 block_nr = get_irn_node_nr(irn);
564 n_projs = get_arm_SwitchJmp_n_projs(irn);
566 projs = xcalloc(n_projs , sizeof(ir_node*));
568 foreach_out_edge(irn, edge) {
569 proj = get_edge_src_irn(edge);
570 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
572 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
575 projs[get_Proj_proj(proj)] = proj;
577 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
584 be_emit_cstring(env->emit, "\tcmp ");
585 arm_emit_source_register(env, irn, 0);
586 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
587 be_emit_finish_line_gas(env->emit, irn);
589 be_emit_cstring(env->emit, "\tbhi ");
590 arm_emit_cfop_target(env->emit, default_proj);
591 be_emit_finish_line_gas(env->emit, default_proj);
594 LDR %r12, .TABLE_X_START
595 ADD %r12, %r12, [%1S, LSL #2]
599 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
600 be_emit_finish_line_gas(env->emit, NULL);
602 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
603 arm_emit_source_register(env, irn, 0);
604 be_emit_cstring(env->emit, ", LSL #2");
605 be_emit_finish_line_gas(env->emit, NULL);
607 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
608 be_emit_finish_line_gas(env->emit, NULL);
610 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
611 be_emit_finish_line_gas(env->emit, NULL);
612 be_emit_irprintf(env->emit, "\t.align 2");
613 be_emit_finish_line_gas(env->emit, NULL);
614 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
615 be_emit_finish_line_gas(env->emit, NULL);
617 for (i = 0; i < n_projs; ++i) {
620 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
622 be_emit_cstring(env->emit, "\t.word\t");
623 arm_emit_cfop_target(env->emit, proj);
624 be_emit_finish_line_gas(env->emit, proj);
626 be_emit_irprintf(env->emit, "\t.align 2\n");
627 be_emit_finish_line_gas(env->emit, NULL);
631 /************************************************************************/
633 /************************************************************************/
635 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
636 ir_entity *ent = be_Call_get_entity(irn);
638 be_emit_cstring(env->emit, "\tbl ");
640 set_entity_backend_marked(ent, 1);
641 be_emit_ident(env->emit, get_entity_ld_ident(ent));
643 arm_emit_source_register(env, irn, be_pos_Call_ptr);
645 be_emit_finish_line_gas(env->emit, irn);
648 /** Emit an IncSP node */
649 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
650 int offs = be_get_IncSP_offset(irn);
653 be_emit_cstring(env->emit, "\tadd ");
654 arm_emit_dest_register(env, irn, 0);
655 be_emit_cstring(env->emit, ", ");
656 arm_emit_source_register(env, irn, 0);
657 be_emit_cstring(env->emit, ", #");
658 arm_emit_offset(env, irn);
660 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
661 arm_emit_offset(env, irn);
662 be_emit_cstring(env->emit,") */");
664 be_emit_finish_line_gas(env->emit, irn);
667 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
668 ir_mode *mode = get_irn_mode(irn);
670 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
671 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
672 arm_emit_source_register(env, irn, 0);
673 be_emit_cstring(env->emit, " -> ");
674 arm_emit_dest_register(env, irn, 0);
675 be_emit_finish_line_gas(env->emit, irn);
679 if (mode_is_float(mode)) {
680 if (USE_FPA(env->cg->isa)) {
681 be_emit_cstring(env->emit, "\tmvf");
682 arm_emit_mode(env, irn);
683 be_emit_char(env->emit, ' ');
684 arm_emit_dest_register(env, irn, 0);
685 be_emit_cstring(env->emit, ", ");
686 arm_emit_source_register(env, irn, 0);
687 be_emit_finish_line_gas(env->emit, irn);
689 assert(0 && "move not supported for this mode");
690 panic("emit_be_Copy: move not supported for this mode");
692 } else if (mode_is_numP(mode)) {
693 be_emit_cstring(env->emit, "\tmov ");
694 arm_emit_dest_register(env, irn, 0);
695 be_emit_cstring(env->emit, ", ");
696 arm_emit_source_register(env, irn, 0);
697 be_emit_finish_line_gas(env->emit, irn);
699 assert(0 && "move not supported for this mode");
700 panic("emit_be_Copy: move not supported for this mode");
705 * Emit code for a Spill.
707 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
708 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
710 if (mode_is_float(mode)) {
711 if (USE_FPA(env->cg->isa)) {
712 be_emit_cstring(env->emit, "\tstf");
713 arm_emit_fpa_postfix(env, mode);
714 be_emit_char(env->emit, ' ');
716 assert(0 && "spill not supported for this mode");
717 panic("emit_be_Spill: spill not supported for this mode");
719 } else if (mode_is_dataM(mode)) {
720 be_emit_cstring(env->emit, "\tstr ");
722 assert(0 && "spill not supported for this mode");
723 panic("emit_be_Spill: spill not supported for this mode");
725 arm_emit_source_register(env, irn, 1);
726 be_emit_cstring(env->emit, ", [");
727 arm_emit_source_register(env, irn, 0);
728 be_emit_cstring(env->emit, ", #");
729 arm_emit_offset(env, irn);
730 be_emit_char(env->emit, ']');
731 be_emit_finish_line_gas(env->emit, irn);
735 * Emit code for a Reload.
737 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
738 ir_mode *mode = get_irn_mode(irn);
740 if (mode_is_float(mode)) {
741 if (USE_FPA(env->cg->isa)) {
742 be_emit_cstring(env->emit, "\tldf");
743 arm_emit_fpa_postfix(env, mode);
744 be_emit_char(env->emit, ' ');
746 assert(0 && "reload not supported for this mode");
747 panic("emit_be_Reload: reload not supported for this mode");
749 } else if (mode_is_dataM(mode)) {
750 be_emit_cstring(env->emit, "\tldr ");
752 assert(0 && "reload not supported for this mode");
753 panic("emit_be_Reload: reload not supported for this mode");
755 arm_emit_dest_register(env, irn, 0);
756 be_emit_cstring(env->emit, ", [");
757 arm_emit_source_register(env, irn, 0);
758 be_emit_cstring(env->emit, ", #");
759 arm_emit_offset(env, irn);
760 be_emit_char(env->emit, ']');
761 be_emit_finish_line_gas(env->emit, irn);
764 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
765 be_emit_cstring(env->emit, "\teor ");
766 arm_emit_source_register(env, irn, 0);
767 be_emit_cstring(env->emit, ", ");
768 arm_emit_source_register(env, irn, 0);
769 be_emit_cstring(env->emit, ", ");
770 arm_emit_source_register(env, irn, 1);
771 be_emit_finish_line_gas(env->emit, NULL);
773 be_emit_cstring(env->emit, "\teor ");
774 arm_emit_source_register(env, irn, 1);
775 be_emit_cstring(env->emit, ", ");
776 arm_emit_source_register(env, irn, 0);
777 be_emit_cstring(env->emit, ", ");
778 arm_emit_source_register(env, irn, 1);
779 be_emit_finish_line_gas(env->emit, NULL);
781 be_emit_cstring(env->emit, "\teor ");
782 arm_emit_source_register(env, irn, 0);
783 be_emit_cstring(env->emit, ", ");
784 arm_emit_source_register(env, irn, 0);
785 be_emit_cstring(env->emit, ", ");
786 arm_emit_source_register(env, irn, 1);
787 be_emit_finish_line_gas(env->emit, irn);
790 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
791 ir_mode *mode = get_irn_mode(irn);
793 if (mode_is_float(mode)) {
794 if (USE_FPA(env->cg->isa)) {
795 be_emit_cstring(env->emit,"\tldf");
796 arm_emit_fpa_postfix(env, mode);
797 be_emit_char(env->emit, ' ');
799 assert(0 && "stackparam not supported for this mode");
800 panic("emit_be_StackParam: stackparam not supported for this mode");
803 be_emit_cstring(env->emit,"\tldr ");
805 arm_emit_dest_register(env, irn, 0);
806 be_emit_cstring(env->emit, ", [");
807 arm_emit_source_register(env, irn, 0);
808 be_emit_cstring(env->emit,", #");
809 arm_emit_offset(env, irn);
810 be_emit_finish_line_gas(env->emit, irn);
813 /************************************************************************/
815 /************************************************************************/
817 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
818 ir_node *block, *next_block;
820 /* for now, the code works for scheduled and non-schedules blocks */
821 block = get_nodes_block(node);
823 /* we have a block schedule */
824 next_block = sched_next_block(block);
825 if (get_cfop_target_block(node) != next_block) {
826 be_emit_cstring(env->emit, "\tb ");
827 arm_emit_cfop_target(env->emit, node);
829 be_emit_cstring(env->emit, "\t/* fallthrough to ");
830 arm_emit_cfop_target(env->emit, node);
831 be_emit_cstring(env->emit, " */");
833 be_emit_finish_line_gas(env->emit, node);
836 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
837 be_emit_cstring(env->emit, "\tstfd ");
838 arm_emit_source_register(env, irn, 0);
839 be_emit_cstring(env->emit, ", [sp, #-8]!");
840 be_emit_pad_comment(env->emit);
841 be_emit_cstring(env->emit, "/* Push fp to stack */");
842 be_emit_finish_line_gas(env->emit, NULL);
844 be_emit_cstring(env->emit, "\tldmfd sp!, {");
845 arm_emit_dest_register(env, irn, 1);
846 be_emit_cstring(env->emit, ", ");
847 arm_emit_dest_register(env, irn, 0);
848 be_emit_char(env->emit, '}');
849 be_emit_pad_comment(env->emit);
850 be_emit_cstring(env->emit, "/* Pop destination */");
851 be_emit_finish_line_gas(env->emit, irn);
854 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
855 panic("TLS not supported for this target\n");
856 /* Er... our gcc does not support it... Install a newer toolchain. */
859 /***********************************************************************************
862 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
863 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
864 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
865 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
867 ***********************************************************************************/
869 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
874 * The type of a emitter function.
876 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
879 * Set a node emitter. Make it a bit more type safe.
881 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
882 op->ops.generic = (op_func)arm_emit_node;
886 * Enters the emitter functions for handled nodes into the generic
887 * pointer of an opcode.
889 static void arm_register_emitters(void) {
891 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
892 #define EMIT(a) set_emitter(op_##a, emit_##a)
893 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
894 #define SILENCE(a) set_emitter(op_##a, emit_silence)
896 /* first clear the generic function pointer for all ops */
897 clear_irp_opcodes_generic_func();
899 /* register all emitter functions defined in spec */
900 arm_register_spec_emitters();
902 /* other emitter functions */
905 // ARM_EMIT(CopyB_i);
931 SILENCE(be_CopyKeep);
932 SILENCE(be_RegParams);
943 static const char *last_name = NULL;
944 static unsigned last_line = -1;
945 static unsigned num = -1;
948 * Emit the debug support for node node.
950 static void arm_emit_dbg(arm_emit_env_t *env, const ir_node *irn) {
951 dbg_info *db = get_irn_dbg_info(irn);
953 const char *fname = be_retrieve_dbg_info(db, &lineno);
955 if (! env->cg->birg->main_env->options->stabs_debug_support)
959 if (last_name != fname) {
961 be_dbg_include_begin(env->cg->birg->main_env->db_handle, fname);
964 if (last_line != lineno) {
967 snprintf(name, sizeof(name), ".LM%u", ++num);
969 be_dbg_line(env->cg->birg->main_env->db_handle, lineno, name);
970 be_emit_string(env->emit, name);
971 be_emit_cstring(env->emit, ":\n");
972 be_emit_write_line(env->emit);
978 * Emits code for a node.
980 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
981 ir_op *op = get_irn_op(irn);
983 if (op->ops.generic) {
984 emit_func *emit = (emit_func *)op->ops.generic;
985 arm_emit_dbg(env, irn);
988 be_emit_cstring(env->emit, "\t/* TODO */");
989 be_emit_finish_line_gas(env->emit, irn);
994 * emit the block label if needed.
996 static void arm_emit_block_header(arm_emit_env_t *env, ir_node *block, ir_node *prev)
1001 ir_exec_freq *exec_freq = env->cg->birg->exec_freq;
1002 be_emit_env_t *emit;
1005 n_cfgpreds = get_Block_n_cfgpreds(block);
1006 if (n_cfgpreds == 1) {
1007 ir_node *pred = get_Block_cfgpred(block, 0);
1008 ir_node *pred_block = get_nodes_block(pred);
1010 /* we don't need labels for fallthrough blocks, however switch-jmps
1011 * are no fallthroughs */
1012 if (pred_block == prev &&
1013 !(is_Proj(pred) && is_arm_SwitchJmp(get_Proj_pred(pred)))) {
1024 arm_emit_block_name(emit, block);
1025 be_emit_char(emit, ':');
1027 be_emit_pad_comment(emit);
1028 be_emit_cstring(emit, " /* preds:");
1030 /* emit list of pred blocks in comment */
1031 arity = get_irn_arity(block);
1032 for (i = 0; i < arity; ++i) {
1033 ir_node *predblock = get_Block_cfgpred_block(block, i);
1034 be_emit_irprintf(emit, " %d", get_irn_node_nr(predblock));
1037 be_emit_cstring(emit, "\t/* ");
1038 arm_emit_block_name(emit, block);
1039 be_emit_cstring(emit, ": ");
1041 if (exec_freq != NULL) {
1042 be_emit_irprintf(emit, " freq: %f",
1043 get_block_execfreq(exec_freq, block));
1045 be_emit_cstring(emit, " */\n");
1046 be_emit_write_line(emit);
1050 * Walks over the nodes in a block connected by scheduling edges
1051 * and emits code for each node.
1053 static void arm_gen_block(void *ctx, ir_node *block, ir_node *prev_block) {
1054 arm_emit_env_t *env = ctx;
1057 arm_emit_block_header(env, block, prev_block);
1058 arm_emit_dbg(env, block);
1059 sched_foreach(block, irn) {
1060 arm_emit_node(env, irn);
1065 * Emits code for function start.
1067 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
1068 be_emit_env_t *eenv = env->emit;
1069 ir_entity *ent = get_irg_entity(irg);
1070 const char *irg_name = get_entity_ld_name(ent);
1072 be_emit_write_line(eenv);
1073 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
1074 be_emit_cstring(eenv, "\t.align 2\n");
1076 if (get_entity_visibility(ent) == visibility_external_visible)
1077 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
1078 be_emit_irprintf(eenv, "%s:\n", irg_name);
1082 * Emits code for function end
1084 void arm_emit_end(FILE *F, ir_graph *irg) {
1085 fprintf(F, "\t.ident \"firmcc\"\n");
1090 * Sets labels for control flow nodes (jump target)
1092 static void arm_gen_labels(ir_node *block, void *env) {
1094 int n = get_Block_n_cfgpreds(block);
1097 for (n--; n >= 0; n--) {
1098 pred = get_Block_cfgpred(block, n);
1099 set_irn_link(pred, block);
1104 * Compare two entries of the symbol or tarval set.
1106 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1107 const sym_or_tv *p1 = elt;
1108 const sym_or_tv *p2 = key;
1110 /* as an identifier NEVER can point to a tarval, it's enough
1111 to compare it this way */
1112 return p1->u.generic != p2->u.generic;
1116 * Main driver. Emits the code for one routine.
1118 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1119 arm_emit_env_t emit_env;
1120 ir_node **blk_sched;
1122 ir_node *last_block = NULL;
1124 emit_env.emit = &cg->isa->emit;
1125 emit_env.arch_env = cg->arch_env;
1127 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1128 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1130 /* set the global arch_env (needed by print hooks) */
1131 arch_env = cg->arch_env;
1133 arm_register_emitters();
1135 /* create the block schedule. For now, we don't need it earlier. */
1136 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1138 arm_func_prolog(&emit_env, irg);
1139 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1141 n = ARR_LEN(blk_sched);
1142 for (i = 0; i < n;) {
1143 ir_node *block, *next_bl;
1145 block = blk_sched[i];
1147 next_bl = i < n ? blk_sched[i] : NULL;
1149 /* set here the link. the emitter expects to find the next block here */
1150 set_irn_link(block, next_bl);
1151 arm_gen_block(&emit_env, block, last_block);
1155 /* emit SymConst values */
1156 if (set_count(emit_env.sym_or_tv) > 0) {
1159 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1161 foreach_set(emit_env.sym_or_tv, entry) {
1162 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1164 if (entry->is_ident) {
1165 be_emit_cstring(emit_env.emit, "\t.word\t");
1166 be_emit_ident(emit_env.emit, entry->u.id);
1167 be_emit_char(emit_env.emit, '\n');
1168 be_emit_write_line(emit_env.emit);
1170 tarval *tv = entry->u.tv;
1171 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1174 /* beware: ARM fpa uses big endian format */
1175 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1177 v = get_tarval_sub_bits(tv, i+3);
1178 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1179 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1180 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1181 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1182 be_emit_write_line(emit_env.emit);
1186 be_emit_char(emit_env.emit, '\n');
1187 be_emit_write_line(emit_env.emit);
1189 del_set(emit_env.sym_or_tv);