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_Reload || irn_op == op_be_Spill) {
174 ir_entity *ent = be_get_frame_entity(node);
175 offset = get_entity_offset(ent);
176 } else if (irn_op == op_be_IncSP) {
177 offset = - be_get_IncSP_offset(node);
179 assert(!"unimplemented arm_emit_offset for this node type");
180 panic("unimplemented arm_emit_offset for this node type");
182 be_emit_irprintf(env->emit, "%d", offset);
186 * Emit the arm fpa instruction suffix depending on the mode.
188 static void arm_emit_fpa_postfix(be_emit_env_t *emit, ir_mode *mode) {
189 int bits = get_mode_size_bits(mode);
191 be_emit_char(emit, 's');
193 be_emit_char(emit, 'd');
195 be_emit_char(emit, 'e');
199 * Emit the instruction suffix depending on the mode.
201 void arm_emit_mode(arm_emit_env_t *env, const ir_node *node) {
204 if (is_arm_irn(node)) {
205 const arm_attr_t *attr = get_arm_attr_const(node);
206 mode = attr->op_mode ? attr->op_mode : get_irn_mode(node);
208 mode = get_irn_mode(node);
210 arm_emit_fpa_postfix(env->emit, mode);
214 * Emit a const or SymConst value.
216 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
217 const arm_attr_t *attr = get_arm_attr_const(node);
219 if (ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM) {
220 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
221 } else if (ARM_GET_FPA_IMM(attr)) {
222 be_emit_irprintf(env->emit, "#0x%F", get_arm_value(node));
223 } else if (is_arm_SymConst(node))
224 be_emit_ident(env->emit, get_arm_symconst_id(node));
226 assert(!"not a Constant");
231 * Returns the tarval or offset of an arm node as a string.
233 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
234 arm_shift_modifier mod;
236 mod = get_arm_shift_modifier(node);
237 if (ARM_HAS_SHIFT(mod)) {
238 long v = get_tarval_long(get_arm_value(node));
240 be_emit_irprintf(env->emit, ", %s #%l", arm_shf_mod_name(mod), v);
244 /** An entry in the sym_or_tv set. */
245 typedef struct sym_or_tv {
247 ident *id; /**< An ident. */
248 tarval *tv; /**< A tarval. */
249 const void *generic; /**< For generic compare. */
251 unsigned label; /**< the associated label. */
252 char is_ident; /**< Non-zero if an ident is stored. */
256 * Returns a unique label. This number will not be used a second time.
258 static unsigned get_unique_label(void) {
259 static unsigned id = 0;
266 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
267 sym_or_tv key, *entry;
270 key.u.id = get_arm_symconst_id(irn);
273 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
274 if (entry->label == 0) {
275 /* allocate a label */
276 entry->label = get_unique_label();
278 label = entry->label;
280 /* load the symbol indirect */
281 be_emit_cstring(env->emit, "\tldr ");
282 arm_emit_dest_register(env, irn, 0);
283 be_emit_irprintf(env->emit, ", .L%u", label);
284 be_emit_finish_line_gas(env->emit, irn);
288 * Emit a floating point fpa constant.
290 static void emit_arm_fpaConst(arm_emit_env_t *env, const ir_node *irn) {
291 sym_or_tv key, *entry;
295 key.u.tv = get_arm_value(irn);
298 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
299 if (entry->label == 0) {
300 /* allocate a label */
301 entry->label = get_unique_label();
303 label = entry->label;
305 /* load the tarval indirect */
306 mode = get_irn_mode(irn);
307 be_emit_cstring(env->emit, "\tldf");
308 arm_emit_fpa_postfix(env->emit, mode);
309 be_emit_char(env->emit, ' ');
311 arm_emit_dest_register(env, irn, 0);
312 be_emit_irprintf(env->emit, ", .L%u", label);
313 be_emit_finish_line_gas(env->emit, irn);
317 * Returns the next block in a block schedule.
319 static ir_node *sched_next_block(const ir_node *block) {
320 return get_irn_link(block);
324 * Returns the target block for a control flow node.
326 static ir_node *get_cfop_target_block(const ir_node *irn) {
327 return get_irn_link(irn);
331 * Emits a block label for the given block.
333 static void arm_emit_block_name(be_emit_env_t *emit, const ir_node *block) {
334 if (has_Block_label(block)) {
335 be_emit_string(emit, be_gas_label_prefix());
336 be_emit_irprintf(emit, "%lu", get_Block_label(block));
338 be_emit_cstring(emit, BLOCK_PREFIX);
339 be_emit_irprintf(emit, "%d", get_irn_node_nr(block));
344 * Emit the target label for a control flow node.
346 static void arm_emit_cfop_target(be_emit_env_t *emit, const ir_node *irn) {
347 ir_node *block = get_cfop_target_block(irn);
349 arm_emit_block_name(emit, block);
353 * Emit a Compare with conditional branch.
355 static void emit_arm_CmpBra(arm_emit_env_t *env, const ir_node *irn) {
356 const ir_edge_t *edge;
357 const ir_node *proj_true = NULL;
358 const ir_node *proj_false = NULL;
359 const ir_node *block;
360 const ir_node *next_block;
361 ir_node *op1 = get_irn_n(irn, 0);
362 ir_mode *opmode = get_irn_mode(op1);
364 int proj_num = get_arm_CondJmp_proj_num(irn);
366 foreach_out_edge(irn, edge) {
367 ir_node *proj = get_edge_src_irn(edge);
368 long nr = get_Proj_proj(proj);
369 if (nr == pn_Cond_true) {
376 /* for now, the code works for scheduled and non-schedules blocks */
377 block = get_nodes_block(irn);
379 /* we have a block schedule */
380 next_block = sched_next_block(block);
382 if (proj_num == pn_Cmp_False) {
383 /* always false: should not happen */
384 be_emit_cstring(env->emit, "\tb ");
385 arm_emit_cfop_target(env->emit, proj_false);
386 be_emit_finish_line_gas(env->emit, proj_false);
387 } else if (proj_num == pn_Cmp_True) {
388 /* always true: should not happen */
389 be_emit_cstring(env->emit, "\tb ");
390 arm_emit_cfop_target(env->emit, proj_true);
391 be_emit_finish_line_gas(env->emit, proj_true);
393 if (mode_is_float(opmode)) {
394 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
396 be_emit_cstring(env->emit, "\tfcmp ");
397 arm_emit_source_register(env, irn, 0);
398 be_emit_cstring(env->emit, ", ");
399 arm_emit_source_register(env, irn, 1);
400 be_emit_finish_line_gas(env->emit, irn);
402 be_emit_cstring(env->emit, "\tfmstat");
403 be_emit_pad_comment(env->emit);
404 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
405 be_emit_finish_line_gas(env->emit, NULL);
407 if (get_cfop_target_block(proj_true) == next_block) {
408 /* exchange both proj's so the second one can be omitted */
409 const ir_node *t = proj_true;
411 proj_true = proj_false;
413 proj_num = get_negated_pnc(proj_num, mode_Iu);
416 case pn_Cmp_Eq: suffix = "eq"; break;
417 case pn_Cmp_Lt: suffix = "lt"; break;
418 case pn_Cmp_Le: suffix = "le"; break;
419 case pn_Cmp_Gt: suffix = "gt"; break;
420 case pn_Cmp_Ge: suffix = "ge"; break;
421 case pn_Cmp_Lg: suffix = "ne"; break;
422 case pn_Cmp_Leg: suffix = "al"; break;
423 default: assert(!"Cmp unsupported"); suffix = "al";
425 be_emit_cstring(env->emit, "\tcmp ");
426 arm_emit_source_register(env, irn, 0);
427 be_emit_cstring(env->emit, ", ");
428 arm_emit_source_register(env, irn, 1);
429 be_emit_finish_line_gas(env->emit, irn);
432 /* emit the true proj */
433 be_emit_irprintf(env->emit, "\tb%s ", suffix);
434 arm_emit_cfop_target(env->emit, proj_true);
435 be_emit_finish_line_gas(env->emit, proj_true);
437 if (get_cfop_target_block(proj_false) == next_block) {
438 be_emit_cstring(env->emit, "\t/* fallthrough to ");
439 arm_emit_cfop_target(env->emit, proj_false);
440 be_emit_cstring(env->emit, " */");
441 be_emit_finish_line_gas(env->emit, proj_false);
443 be_emit_cstring(env->emit, "b ");
444 arm_emit_cfop_target(env->emit, proj_false);
445 be_emit_finish_line_gas(env->emit, proj_false);
451 * Emit a Compare with conditional branch.
453 static void emit_arm_fpaCmfBra(arm_emit_env_t *env, const ir_node *irn) {
459 * Emit a Compare with conditional branch.
461 static void emit_arm_fpaCmfeBra(arm_emit_env_t *env, const ir_node *irn) {
466 /** Sort register in ascending order. */
467 static int reg_cmp(const void *a, const void *b) {
468 const arch_register_t * const *ra = a;
469 const arch_register_t * const *rb = b;
471 return *ra < *rb ? -1 : (*ra != *rb);
475 * Create the CopyB instruction sequence.
477 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
478 unsigned int size = get_tarval_long(get_arm_value(irn));
480 const char *tgt = arch_register_get_name(get_in_reg(env->arch_env, irn, 0));
481 const char *src = arch_register_get_name(get_in_reg(env->arch_env, irn, 1));
482 const char *t0, *t1, *t2, *t3;
485 const arch_register_t *tmpregs[4];
487 /* collect the temporary registers and sort them, we need ascending order */
488 tmpregs[0] = get_in_reg(env->arch_env, irn, 2);
489 tmpregs[1] = get_in_reg(env->arch_env, irn, 3);
490 tmpregs[2] = get_in_reg(env->arch_env, irn, 4);
491 tmpregs[3] = &arm_gp_regs[REG_R12];
493 /* Note: R12 is always the last register because the RA did not assign higher ones */
494 qsort((void *)tmpregs, 3, sizeof(tmpregs[0]), reg_cmp);
496 /* need ascending order */
497 t0 = arch_register_get_name(tmpregs[0]);
498 t1 = arch_register_get_name(tmpregs[1]);
499 t2 = arch_register_get_name(tmpregs[2]);
500 t3 = arch_register_get_name(tmpregs[3]);
502 be_emit_cstring(env->emit, "/* MemCopy (");
503 be_emit_string(env->emit, src);
504 be_emit_cstring(env->emit, ")->(");
505 arm_emit_source_register(env, irn, 0);
506 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
507 be_emit_string(env->emit, t0);
508 be_emit_cstring(env->emit, ", ");
509 be_emit_string(env->emit, t1);
510 be_emit_cstring(env->emit, ", ");
511 be_emit_string(env->emit, t2);
512 be_emit_cstring(env->emit, ", and ");
513 be_emit_string(env->emit, t3);
514 be_emit_cstring(env->emit, "*/");
515 be_emit_finish_line_gas(env->emit, NULL);
517 assert(size > 0 && "CopyB needs size > 0" );
520 assert(!"strange hack enabled: copy more bytes than needed!");
530 be_emit_cstring(emit, "\tldr ");
531 be_emit_string(emit, t3);
532 be_emit_cstring(emit, ", [");
533 be_emit_string(emit, src);
534 be_emit_cstring(emit, ", #0]");
535 be_emit_finish_line_gas(emit, NULL);
537 be_emit_cstring(emit, "\tstr ");
538 be_emit_string(emit, t3);
539 be_emit_cstring(emit, ", [");
540 be_emit_string(emit, tgt);
541 be_emit_cstring(emit, ", #0]");
542 be_emit_finish_line_gas(emit, irn);
545 be_emit_cstring(emit, "\tldmia ");
546 be_emit_string(emit, src);
547 be_emit_cstring(emit, "!, {");
548 be_emit_string(emit, t0);
549 be_emit_cstring(emit, ", ");
550 be_emit_string(emit, t1);
551 be_emit_char(emit, '}');
552 be_emit_finish_line_gas(emit, NULL);
554 be_emit_cstring(emit, "\tstmia ");
555 be_emit_string(emit, tgt);
556 be_emit_cstring(emit, "!, {");
557 be_emit_string(emit, t0);
558 be_emit_cstring(emit, ", ");
559 be_emit_string(emit, t1);
560 be_emit_char(emit, '}');
561 be_emit_finish_line_gas(emit, irn);
564 be_emit_cstring(emit, "\tldmia ");
565 be_emit_string(emit, src);
566 be_emit_cstring(emit, "!, {");
567 be_emit_string(emit, t0);
568 be_emit_cstring(emit, ", ");
569 be_emit_string(emit, t1);
570 be_emit_cstring(emit, ", ");
571 be_emit_string(emit, t2);
572 be_emit_char(emit, '}');
573 be_emit_finish_line_gas(emit, NULL);
575 be_emit_cstring(emit, "\tstmia ");
576 be_emit_string(emit, tgt);
577 be_emit_cstring(emit, "!, {");
578 be_emit_string(emit, t0);
579 be_emit_cstring(emit, ", ");
580 be_emit_string(emit, t1);
581 be_emit_cstring(emit, ", ");
582 be_emit_string(emit, t2);
583 be_emit_char(emit, '}');
584 be_emit_finish_line_gas(emit, irn);
589 be_emit_cstring(emit, "\tldmia ");
590 be_emit_string(emit, src);
591 be_emit_cstring(emit, "!, {");
592 be_emit_string(emit, t0);
593 be_emit_cstring(emit, ", ");
594 be_emit_string(emit, t1);
595 be_emit_cstring(emit, ", ");
596 be_emit_string(emit, t2);
597 be_emit_cstring(emit, ", ");
598 be_emit_string(emit, t3);
599 be_emit_char(emit, '}');
600 be_emit_finish_line_gas(emit, NULL);
602 be_emit_cstring(emit, "\tstmia ");
603 be_emit_string(emit, tgt);
604 be_emit_cstring(emit, "!, {");
605 be_emit_string(emit, t0);
606 be_emit_cstring(emit, ", ");
607 be_emit_string(emit, t1);
608 be_emit_cstring(emit, ", ");
609 be_emit_string(emit, t2);
610 be_emit_cstring(emit, ", ");
611 be_emit_string(emit, t3);
612 be_emit_char(emit, '}');
613 be_emit_finish_line_gas(emit, irn);
618 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
619 const ir_edge_t *edge;
625 ir_node *default_proj = NULL;
627 block_nr = get_irn_node_nr(irn);
628 n_projs = get_arm_SwitchJmp_n_projs(irn);
630 projs = xcalloc(n_projs , sizeof(ir_node*));
632 foreach_out_edge(irn, edge) {
633 proj = get_edge_src_irn(edge);
634 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
636 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
639 projs[get_Proj_proj(proj)] = proj;
641 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
648 be_emit_cstring(env->emit, "\tcmp ");
649 arm_emit_source_register(env, irn, 0);
650 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
651 be_emit_finish_line_gas(env->emit, irn);
653 be_emit_cstring(env->emit, "\tbhi ");
654 arm_emit_cfop_target(env->emit, default_proj);
655 be_emit_finish_line_gas(env->emit, default_proj);
658 LDR %r12, .TABLE_X_START
659 ADD %r12, %r12, [%1S, LSL #2]
663 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
664 be_emit_finish_line_gas(env->emit, NULL);
666 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
667 arm_emit_source_register(env, irn, 0);
668 be_emit_cstring(env->emit, ", LSL #2");
669 be_emit_finish_line_gas(env->emit, NULL);
671 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
672 be_emit_finish_line_gas(env->emit, NULL);
674 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
675 be_emit_finish_line_gas(env->emit, NULL);
676 be_emit_irprintf(env->emit, "\t.align 2");
677 be_emit_finish_line_gas(env->emit, NULL);
678 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
679 be_emit_finish_line_gas(env->emit, NULL);
681 for (i = 0; i < n_projs; ++i) {
684 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
686 be_emit_cstring(env->emit, "\t.word\t");
687 arm_emit_cfop_target(env->emit, proj);
688 be_emit_finish_line_gas(env->emit, proj);
690 be_emit_irprintf(env->emit, "\t.align 2\n");
691 be_emit_finish_line_gas(env->emit, NULL);
695 /************************************************************************/
697 /************************************************************************/
699 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
700 ir_entity *ent = be_Call_get_entity(irn);
702 be_emit_cstring(env->emit, "\tbl ");
704 set_entity_backend_marked(ent, 1);
705 be_emit_ident(env->emit, get_entity_ld_ident(ent));
707 arm_emit_source_register(env, irn, be_pos_Call_ptr);
709 be_emit_finish_line_gas(env->emit, irn);
712 /** Emit an IncSP node */
713 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
714 int offs = be_get_IncSP_offset(irn);
717 be_emit_cstring(env->emit, "\tadd ");
718 arm_emit_dest_register(env, irn, 0);
719 be_emit_cstring(env->emit, ", ");
720 arm_emit_source_register(env, irn, 0);
721 be_emit_cstring(env->emit, ", #");
722 arm_emit_offset(env, irn);
724 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
725 arm_emit_offset(env, irn);
726 be_emit_cstring(env->emit,") */");
728 be_emit_finish_line_gas(env->emit, irn);
731 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
732 ir_mode *mode = get_irn_mode(irn);
734 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
735 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
736 arm_emit_source_register(env, irn, 0);
737 be_emit_cstring(env->emit, " -> ");
738 arm_emit_dest_register(env, irn, 0);
739 be_emit_finish_line_gas(env->emit, irn);
743 if (mode_is_float(mode)) {
744 if (USE_FPA(env->cg->isa)) {
745 be_emit_cstring(env->emit, "\tmvf");
746 arm_emit_mode(env, irn);
747 be_emit_char(env->emit, ' ');
748 arm_emit_dest_register(env, irn, 0);
749 be_emit_cstring(env->emit, ", ");
750 arm_emit_source_register(env, irn, 0);
751 be_emit_finish_line_gas(env->emit, irn);
753 assert(0 && "move not supported for this mode");
754 panic("emit_be_Copy: move not supported for this mode");
756 } else if (mode_is_data(mode)) {
757 be_emit_cstring(env->emit, "\tmov ");
758 arm_emit_dest_register(env, irn, 0);
759 be_emit_cstring(env->emit, ", ");
760 arm_emit_source_register(env, irn, 0);
761 be_emit_finish_line_gas(env->emit, irn);
763 assert(0 && "move not supported for this mode");
764 panic("emit_be_Copy: move not supported for this mode");
769 * Emit code for a Spill.
771 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
772 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
774 if (mode_is_float(mode)) {
775 if (USE_FPA(env->cg->isa)) {
776 be_emit_cstring(env->emit, "\tstf");
777 arm_emit_fpa_postfix(env->emit, mode);
778 be_emit_char(env->emit, ' ');
780 assert(0 && "spill not supported for this mode");
781 panic("emit_be_Spill: spill not supported for this mode");
783 } else if (mode_is_dataM(mode)) {
784 be_emit_cstring(env->emit, "\tstr ");
786 assert(0 && "spill not supported for this mode");
787 panic("emit_be_Spill: spill not supported for this mode");
789 arm_emit_source_register(env, irn, 1);
790 be_emit_cstring(env->emit, ", [");
791 arm_emit_source_register(env, irn, 0);
792 be_emit_cstring(env->emit, ", #");
793 arm_emit_offset(env, irn);
794 be_emit_char(env->emit, ']');
795 be_emit_finish_line_gas(env->emit, irn);
799 * Emit code for a Reload.
801 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
802 ir_mode *mode = get_irn_mode(irn);
804 if (mode_is_float(mode)) {
805 if (USE_FPA(env->cg->isa)) {
806 be_emit_cstring(env->emit, "\tldf");
807 arm_emit_fpa_postfix(env->emit, mode);
808 be_emit_char(env->emit, ' ');
810 assert(0 && "reload not supported for this mode");
811 panic("emit_be_Reload: reload not supported for this mode");
813 } else if (mode_is_dataM(mode)) {
814 be_emit_cstring(env->emit, "\tldr ");
816 assert(0 && "reload not supported for this mode");
817 panic("emit_be_Reload: reload not supported for this mode");
819 arm_emit_dest_register(env, irn, 0);
820 be_emit_cstring(env->emit, ", [");
821 arm_emit_source_register(env, irn, 0);
822 be_emit_cstring(env->emit, ", #");
823 arm_emit_offset(env, irn);
824 be_emit_char(env->emit, ']');
825 be_emit_finish_line_gas(env->emit, irn);
828 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
829 be_emit_cstring(env->emit, "\teor ");
830 arm_emit_source_register(env, irn, 0);
831 be_emit_cstring(env->emit, ", ");
832 arm_emit_source_register(env, irn, 0);
833 be_emit_cstring(env->emit, ", ");
834 arm_emit_source_register(env, irn, 1);
835 be_emit_finish_line_gas(env->emit, NULL);
837 be_emit_cstring(env->emit, "\teor ");
838 arm_emit_source_register(env, irn, 1);
839 be_emit_cstring(env->emit, ", ");
840 arm_emit_source_register(env, irn, 0);
841 be_emit_cstring(env->emit, ", ");
842 arm_emit_source_register(env, irn, 1);
843 be_emit_finish_line_gas(env->emit, NULL);
845 be_emit_cstring(env->emit, "\teor ");
846 arm_emit_source_register(env, irn, 0);
847 be_emit_cstring(env->emit, ", ");
848 arm_emit_source_register(env, irn, 0);
849 be_emit_cstring(env->emit, ", ");
850 arm_emit_source_register(env, irn, 1);
851 be_emit_finish_line_gas(env->emit, irn);
854 /************************************************************************/
856 /************************************************************************/
858 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
859 ir_node *block, *next_block;
861 /* for now, the code works for scheduled and non-schedules blocks */
862 block = get_nodes_block(node);
864 /* we have a block schedule */
865 next_block = sched_next_block(block);
866 if (get_cfop_target_block(node) != next_block) {
867 be_emit_cstring(env->emit, "\tb ");
868 arm_emit_cfop_target(env->emit, node);
870 be_emit_cstring(env->emit, "\t/* fallthrough to ");
871 arm_emit_cfop_target(env->emit, node);
872 be_emit_cstring(env->emit, " */");
874 be_emit_finish_line_gas(env->emit, node);
877 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
878 be_emit_cstring(env->emit, "\tstfd ");
879 arm_emit_source_register(env, irn, 0);
880 be_emit_cstring(env->emit, ", [sp, #-8]!");
881 be_emit_pad_comment(env->emit);
882 be_emit_cstring(env->emit, "/* Push fp to stack */");
883 be_emit_finish_line_gas(env->emit, NULL);
885 be_emit_cstring(env->emit, "\tldmfd sp!, {");
886 arm_emit_dest_register(env, irn, 1);
887 be_emit_cstring(env->emit, ", ");
888 arm_emit_dest_register(env, irn, 0);
889 be_emit_char(env->emit, '}');
890 be_emit_pad_comment(env->emit);
891 be_emit_cstring(env->emit, "/* Pop destination */");
892 be_emit_finish_line_gas(env->emit, irn);
895 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
898 panic("TLS not supported for this target\n");
899 /* Er... our gcc does not support it... Install a newer toolchain. */
902 /***********************************************************************************
905 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
906 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
907 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
908 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
910 ***********************************************************************************/
912 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
919 * The type of a emitter function.
921 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
924 * Set a node emitter. Make it a bit more type safe.
926 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
927 op->ops.generic = (op_func)arm_emit_node;
931 * Enters the emitter functions for handled nodes into the generic
932 * pointer of an opcode.
934 static void arm_register_emitters(void) {
936 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
937 #define EMIT(a) set_emitter(op_##a, emit_##a)
938 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
939 #define SILENCE(a) set_emitter(op_##a, emit_silence)
941 /* first clear the generic function pointer for all ops */
942 clear_irp_opcodes_generic_func();
944 /* register all emitter functions defined in spec */
945 arm_register_spec_emitters();
947 /* other emitter functions */
950 ARM_EMIT(fpaCmfeBra);
952 // ARM_EMIT(CopyB_i);
977 SILENCE(be_CopyKeep);
978 SILENCE(be_RegParams);
989 static const char *last_name = NULL;
990 static unsigned last_line = -1;
991 static unsigned num = -1;
994 * Emit the debug support for node node.
996 static void arm_emit_dbg(arm_emit_env_t *env, const ir_node *irn) {
997 dbg_info *db = get_irn_dbg_info(irn);
999 const char *fname = be_retrieve_dbg_info(db, &lineno);
1001 if (! env->cg->birg->main_env->options->stabs_debug_support)
1005 if (last_name != fname) {
1007 be_dbg_include_begin(env->cg->birg->main_env->db_handle, fname);
1010 if (last_line != lineno) {
1013 snprintf(name, sizeof(name), ".LM%u", ++num);
1015 be_dbg_line(env->cg->birg->main_env->db_handle, lineno, name);
1016 be_emit_string(env->emit, name);
1017 be_emit_cstring(env->emit, ":\n");
1018 be_emit_write_line(env->emit);
1024 * Emits code for a node.
1026 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
1027 ir_op *op = get_irn_op(irn);
1029 if (op->ops.generic) {
1030 emit_func *emit = (emit_func *)op->ops.generic;
1031 arm_emit_dbg(env, irn);
1034 be_emit_cstring(env->emit, "\t/* TODO */");
1035 be_emit_finish_line_gas(env->emit, irn);
1040 * emit the block label if needed.
1042 static void arm_emit_block_header(arm_emit_env_t *env, ir_node *block, ir_node *prev)
1047 ir_exec_freq *exec_freq = env->cg->birg->exec_freq;
1048 be_emit_env_t *emit;
1051 n_cfgpreds = get_Block_n_cfgpreds(block);
1052 if (n_cfgpreds == 1) {
1053 ir_node *pred = get_Block_cfgpred(block, 0);
1054 ir_node *pred_block = get_nodes_block(pred);
1056 /* we don't need labels for fallthrough blocks, however switch-jmps
1057 * are no fallthroughs */
1058 if (pred_block == prev &&
1059 !(is_Proj(pred) && is_arm_SwitchJmp(get_Proj_pred(pred)))) {
1070 arm_emit_block_name(emit, block);
1071 be_emit_char(emit, ':');
1073 be_emit_pad_comment(emit);
1074 be_emit_cstring(emit, " /* preds:");
1076 /* emit list of pred blocks in comment */
1077 arity = get_irn_arity(block);
1078 for (i = 0; i < arity; ++i) {
1079 ir_node *predblock = get_Block_cfgpred_block(block, i);
1080 be_emit_irprintf(emit, " %d", get_irn_node_nr(predblock));
1083 be_emit_cstring(emit, "\t/* ");
1084 arm_emit_block_name(emit, block);
1085 be_emit_cstring(emit, ": ");
1087 if (exec_freq != NULL) {
1088 be_emit_irprintf(emit, " freq: %f",
1089 get_block_execfreq(exec_freq, block));
1091 be_emit_cstring(emit, " */\n");
1092 be_emit_write_line(emit);
1096 * Walks over the nodes in a block connected by scheduling edges
1097 * and emits code for each node.
1099 static void arm_gen_block(void *ctx, ir_node *block, ir_node *prev_block) {
1100 arm_emit_env_t *env = ctx;
1103 arm_emit_block_header(env, block, prev_block);
1104 arm_emit_dbg(env, block);
1105 sched_foreach(block, irn) {
1106 arm_emit_node(env, irn);
1111 * Emits code for function start.
1113 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
1114 be_emit_env_t *eenv = env->emit;
1115 ir_entity *ent = get_irg_entity(irg);
1116 const char *irg_name = get_entity_ld_name(ent);
1118 be_emit_write_line(eenv);
1119 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
1120 be_emit_cstring(eenv, "\t.align 2\n");
1122 if (get_entity_visibility(ent) == visibility_external_visible)
1123 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
1124 be_emit_irprintf(eenv, "%s:\n", irg_name);
1128 * Emits code for function end
1130 void arm_emit_end(FILE *F, ir_graph *irg) {
1132 fprintf(F, "\t.ident \"firmcc\"\n");
1137 * Sets labels for control flow nodes (jump target)
1139 static void arm_gen_labels(ir_node *block, void *env) {
1141 int n = get_Block_n_cfgpreds(block);
1144 for (n--; n >= 0; n--) {
1145 pred = get_Block_cfgpred(block, n);
1146 set_irn_link(pred, block);
1151 * Compare two entries of the symbol or tarval set.
1153 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1154 const sym_or_tv *p1 = elt;
1155 const sym_or_tv *p2 = key;
1158 /* as an identifier NEVER can point to a tarval, it's enough
1159 to compare it this way */
1160 return p1->u.generic != p2->u.generic;
1164 * Main driver. Emits the code for one routine.
1166 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1167 arm_emit_env_t emit_env;
1168 ir_node **blk_sched;
1170 ir_node *last_block = NULL;
1172 emit_env.emit = &cg->isa->emit;
1173 emit_env.arch_env = cg->arch_env;
1175 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1176 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1178 /* set the global arch_env (needed by print hooks) */
1179 arch_env = cg->arch_env;
1181 arm_register_emitters();
1183 /* create the block schedule. For now, we don't need it earlier. */
1184 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1186 arm_func_prolog(&emit_env, irg);
1187 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1189 n = ARR_LEN(blk_sched);
1190 for (i = 0; i < n;) {
1191 ir_node *block, *next_bl;
1193 block = blk_sched[i];
1195 next_bl = i < n ? blk_sched[i] : NULL;
1197 /* set here the link. the emitter expects to find the next block here */
1198 set_irn_link(block, next_bl);
1199 arm_gen_block(&emit_env, block, last_block);
1203 /* emit SymConst values */
1204 if (set_count(emit_env.sym_or_tv) > 0) {
1207 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1209 foreach_set(emit_env.sym_or_tv, entry) {
1210 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1212 if (entry->is_ident) {
1213 be_emit_cstring(emit_env.emit, "\t.word\t");
1214 be_emit_ident(emit_env.emit, entry->u.id);
1215 be_emit_char(emit_env.emit, '\n');
1216 be_emit_write_line(emit_env.emit);
1218 tarval *tv = entry->u.tv;
1219 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1222 /* beware: ARM fpa uses big endian format */
1223 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1225 v = get_tarval_sub_bits(tv, i+3);
1226 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1227 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1228 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1229 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1230 be_emit_write_line(emit_env.emit);
1234 be_emit_char(emit_env.emit, '\n');
1235 be_emit_write_line(emit_env.emit);
1237 del_set(emit_env.sym_or_tv);