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(be_emit_env_t *emit, ir_mode *mode) {
192 int bits = get_mode_size_bits(mode);
194 be_emit_char(emit, 's');
196 be_emit_char(emit, 'd');
198 be_emit_char(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->emit, mode);
217 * Emit a const or SymConst value.
219 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
220 const arm_attr_t *attr = get_arm_attr_const(node);
222 if (ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM) {
223 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
224 } else if (ARM_GET_FPA_IMM(attr)) {
225 be_emit_irprintf(env->emit, "#0x%F", get_arm_value(node));
226 } else if (is_arm_SymConst(node))
227 be_emit_ident(env->emit, get_arm_symconst_id(node));
229 assert(!"not a Constant");
234 * Returns the tarval or offset of an arm node as a string.
236 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
237 arm_shift_modifier mod;
239 mod = get_arm_shift_modifier(node);
240 if (ARM_HAS_SHIFT(mod)) {
241 long v = get_tarval_long(get_arm_value(node));
243 be_emit_irprintf(env->emit, ", %s #%l", arm_shf_mod_name(mod), v);
247 /** An entry in the sym_or_tv set. */
248 typedef struct sym_or_tv {
250 ident *id; /**< An ident. */
251 tarval *tv; /**< A tarval. */
252 const void *generic; /**< For generic compare. */
254 unsigned label; /**< the associated label. */
255 char is_ident; /**< Non-zero if an ident is stored. */
259 * Returns a unique label. This number will not be used a second time.
261 static unsigned get_unique_label(void) {
262 static unsigned id = 0;
269 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
270 sym_or_tv key, *entry;
273 key.u.id = get_arm_symconst_id(irn);
276 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
277 if (entry->label == 0) {
278 /* allocate a label */
279 entry->label = get_unique_label();
281 label = entry->label;
283 /* load the symbol indirect */
284 be_emit_cstring(env->emit, "\tldr ");
285 arm_emit_dest_register(env, irn, 0);
286 be_emit_irprintf(env->emit, ", .L%u", label);
287 be_emit_finish_line_gas(env->emit, irn);
291 * Emit a floating point fpa constant.
293 static void emit_arm_fpaConst(arm_emit_env_t *env, const ir_node *irn) {
294 sym_or_tv key, *entry;
298 key.u.tv = get_arm_value(irn);
301 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
302 if (entry->label == 0) {
303 /* allocate a label */
304 entry->label = get_unique_label();
306 label = entry->label;
308 /* load the tarval indirect */
309 mode = get_irn_mode(irn);
310 be_emit_cstring(env->emit, "\tldf");
311 arm_emit_fpa_postfix(env->emit, mode);
312 be_emit_char(env->emit, ' ');
314 arm_emit_dest_register(env, irn, 0);
315 be_emit_irprintf(env->emit, ", .L%u", label);
316 be_emit_finish_line_gas(env->emit, irn);
320 * Returns the next block in a block schedule.
322 static ir_node *sched_next_block(const ir_node *block) {
323 return get_irn_link(block);
327 * Returns the target block for a control flow node.
329 static ir_node *get_cfop_target_block(const ir_node *irn) {
330 return get_irn_link(irn);
334 * Emits a block label for the given block.
336 static void arm_emit_block_name(be_emit_env_t *emit, const ir_node *block) {
337 be_emit_cstring(emit, BLOCK_PREFIX);
338 be_emit_irprintf(emit, "%d", get_irn_node_nr(block));
342 * Emit the target label for a control flow node.
344 static void arm_emit_cfop_target(be_emit_env_t *emit, const ir_node *irn) {
345 ir_node *block = get_cfop_target_block(irn);
347 arm_emit_block_name(emit, block);
351 * Emit a Compare with conditional branch.
353 static void emit_arm_CmpBra(arm_emit_env_t *env, const ir_node *irn) {
354 const ir_edge_t *edge;
355 const ir_node *proj_true = NULL;
356 const ir_node *proj_false = NULL;
357 const ir_node *block;
358 const ir_node *next_block;
359 ir_node *op1 = get_irn_n(irn, 0);
360 ir_mode *opmode = get_irn_mode(op1);
362 int proj_num = get_arm_CondJmp_proj_num(irn);
364 foreach_out_edge(irn, edge) {
365 ir_node *proj = get_edge_src_irn(edge);
366 long nr = get_Proj_proj(proj);
367 if (nr == pn_Cond_true) {
374 /* for now, the code works for scheduled and non-schedules blocks */
375 block = get_nodes_block(irn);
377 /* we have a block schedule */
378 next_block = sched_next_block(block);
380 if (proj_num == pn_Cmp_False) {
381 /* always false: should not happen */
382 be_emit_cstring(env->emit, "\tb ");
383 arm_emit_cfop_target(env->emit, proj_false);
384 be_emit_finish_line_gas(env->emit, proj_false);
385 } else if (proj_num == pn_Cmp_True) {
386 /* always true: should not happen */
387 be_emit_cstring(env->emit, "\tb ");
388 arm_emit_cfop_target(env->emit, proj_true);
389 be_emit_finish_line_gas(env->emit, proj_true);
391 if (mode_is_float(opmode)) {
392 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
394 be_emit_cstring(env->emit, "\tfcmp ");
395 arm_emit_source_register(env, irn, 0);
396 be_emit_cstring(env->emit, ", ");
397 arm_emit_source_register(env, irn, 1);
398 be_emit_finish_line_gas(env->emit, irn);
400 be_emit_cstring(env->emit, "\tfmstat");
401 be_emit_pad_comment(env->emit);
402 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
403 be_emit_finish_line_gas(env->emit, NULL);
405 if (get_cfop_target_block(proj_true) == next_block) {
406 /* exchange both proj's so the second one can be omitted */
407 const ir_node *t = proj_true;
409 proj_true = proj_false;
411 proj_num = get_negated_pnc(proj_num, mode_Iu);
414 case pn_Cmp_Eq: suffix = "eq"; break;
415 case pn_Cmp_Lt: suffix = "lt"; break;
416 case pn_Cmp_Le: suffix = "le"; break;
417 case pn_Cmp_Gt: suffix = "gt"; break;
418 case pn_Cmp_Ge: suffix = "ge"; break;
419 case pn_Cmp_Lg: suffix = "ne"; break;
420 case pn_Cmp_Leg: suffix = "al"; break;
421 default: assert(!"Cmp unsupported"); suffix = "al";
423 be_emit_cstring(env->emit, "\tcmp ");
424 arm_emit_source_register(env, irn, 0);
425 be_emit_cstring(env->emit, ", ");
426 arm_emit_source_register(env, irn, 1);
427 be_emit_finish_line_gas(env->emit, irn);
430 /* emit the true proj */
431 be_emit_irprintf(env->emit, "\tb%s ", suffix);
432 arm_emit_cfop_target(env->emit, proj_true);
433 be_emit_finish_line_gas(env->emit, proj_true);
435 if (get_cfop_target_block(proj_false) == next_block) {
436 be_emit_cstring(env->emit, "\t/* fallthrough to ");
437 arm_emit_cfop_target(env->emit, proj_false);
438 be_emit_cstring(env->emit, " */");
439 be_emit_finish_line_gas(env->emit, proj_false);
441 be_emit_cstring(env->emit, "b ");
442 arm_emit_cfop_target(env->emit, proj_false);
443 be_emit_finish_line_gas(env->emit, proj_false);
449 * Emit a Compare with conditional branch.
451 static void emit_arm_fpaCmfBra(arm_emit_env_t *env, const ir_node *irn) {
457 * Emit a Compare with conditional branch.
459 static void emit_arm_fpaCmfeBra(arm_emit_env_t *env, const ir_node *irn) {
464 /** Sort register in ascending order. */
465 static int reg_cmp(const void *a, const void *b) {
466 const arch_register_t * const *ra = a;
467 const arch_register_t * const *rb = b;
469 return *ra < *rb ? -1 : (*ra != *rb);
473 * Create the CopyB instruction sequence.
475 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
476 unsigned int size = get_tarval_long(get_arm_value(irn));
478 const char *tgt = arch_register_get_name(get_in_reg(env->arch_env, irn, 0));
479 const char *src = arch_register_get_name(get_in_reg(env->arch_env, irn, 1));
480 const char *t0, *t1, *t2, *t3;
483 const arch_register_t *tmpregs[4];
485 /* collect the temporary registers and sort them, we need ascending order */
486 tmpregs[0] = get_in_reg(env->arch_env, irn, 2);
487 tmpregs[1] = get_in_reg(env->arch_env, irn, 3);
488 tmpregs[2] = get_in_reg(env->arch_env, irn, 4);
489 tmpregs[3] = &arm_gp_regs[REG_R12];
491 /* Note: R12 is always the last register because the RA did not assign higher ones */
492 qsort((void *)tmpregs, 3, sizeof(tmpregs[0]), reg_cmp);
494 /* need ascending order */
495 t0 = arch_register_get_name(tmpregs[0]);
496 t1 = arch_register_get_name(tmpregs[1]);
497 t2 = arch_register_get_name(tmpregs[2]);
498 t3 = arch_register_get_name(tmpregs[3]);
500 be_emit_cstring(env->emit, "/* MemCopy (");
501 be_emit_string(env->emit, src);
502 be_emit_cstring(env->emit, ")->(");
503 arm_emit_source_register(env, irn, 0);
504 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
505 be_emit_string(env->emit, t0);
506 be_emit_cstring(env->emit, ", ");
507 be_emit_string(env->emit, t1);
508 be_emit_cstring(env->emit, ", ");
509 be_emit_string(env->emit, t2);
510 be_emit_cstring(env->emit, ", and ");
511 be_emit_string(env->emit, t3);
512 be_emit_cstring(env->emit, "*/");
513 be_emit_finish_line_gas(env->emit, NULL);
515 assert(size > 0 && "CopyB needs size > 0" );
518 assert(!"strange hack enabled: copy more bytes than needed!");
528 be_emit_cstring(emit, "\tldr ");
529 be_emit_string(emit, t3);
530 be_emit_cstring(emit, ", [");
531 be_emit_string(emit, src);
532 be_emit_cstring(emit, ", #0]");
533 be_emit_finish_line_gas(emit, NULL);
535 be_emit_cstring(emit, "\tstr ");
536 be_emit_string(emit, t3);
537 be_emit_cstring(emit, ", [");
538 be_emit_string(emit, tgt);
539 be_emit_cstring(emit, ", #0]");
540 be_emit_finish_line_gas(emit, irn);
543 be_emit_cstring(emit, "\tldmia ");
544 be_emit_string(emit, src);
545 be_emit_cstring(emit, "!, {");
546 be_emit_string(emit, t0);
547 be_emit_cstring(emit, ", ");
548 be_emit_string(emit, t1);
549 be_emit_char(emit, '}');
550 be_emit_finish_line_gas(emit, NULL);
552 be_emit_cstring(emit, "\tstmia ");
553 be_emit_string(emit, tgt);
554 be_emit_cstring(emit, "!, {");
555 be_emit_string(emit, t0);
556 be_emit_cstring(emit, ", ");
557 be_emit_string(emit, t1);
558 be_emit_char(emit, '}');
559 be_emit_finish_line_gas(emit, irn);
562 be_emit_cstring(emit, "\tldmia ");
563 be_emit_string(emit, src);
564 be_emit_cstring(emit, "!, {");
565 be_emit_string(emit, t0);
566 be_emit_cstring(emit, ", ");
567 be_emit_string(emit, t1);
568 be_emit_cstring(emit, ", ");
569 be_emit_string(emit, t2);
570 be_emit_char(emit, '}');
571 be_emit_finish_line_gas(emit, NULL);
573 be_emit_cstring(emit, "\tstmia ");
574 be_emit_string(emit, tgt);
575 be_emit_cstring(emit, "!, {");
576 be_emit_string(emit, t0);
577 be_emit_cstring(emit, ", ");
578 be_emit_string(emit, t1);
579 be_emit_cstring(emit, ", ");
580 be_emit_string(emit, t2);
581 be_emit_char(emit, '}');
582 be_emit_finish_line_gas(emit, irn);
587 be_emit_cstring(emit, "\tldmia ");
588 be_emit_string(emit, src);
589 be_emit_cstring(emit, "!, {");
590 be_emit_string(emit, t0);
591 be_emit_cstring(emit, ", ");
592 be_emit_string(emit, t1);
593 be_emit_cstring(emit, ", ");
594 be_emit_string(emit, t2);
595 be_emit_cstring(emit, ", ");
596 be_emit_string(emit, t3);
597 be_emit_char(emit, '}');
598 be_emit_finish_line_gas(emit, NULL);
600 be_emit_cstring(emit, "\tstmia ");
601 be_emit_string(emit, tgt);
602 be_emit_cstring(emit, "!, {");
603 be_emit_string(emit, t0);
604 be_emit_cstring(emit, ", ");
605 be_emit_string(emit, t1);
606 be_emit_cstring(emit, ", ");
607 be_emit_string(emit, t2);
608 be_emit_cstring(emit, ", ");
609 be_emit_string(emit, t3);
610 be_emit_char(emit, '}');
611 be_emit_finish_line_gas(emit, irn);
616 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
617 const ir_edge_t *edge;
623 ir_node *default_proj = NULL;
625 block_nr = get_irn_node_nr(irn);
626 n_projs = get_arm_SwitchJmp_n_projs(irn);
628 projs = xcalloc(n_projs , sizeof(ir_node*));
630 foreach_out_edge(irn, edge) {
631 proj = get_edge_src_irn(edge);
632 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
634 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
637 projs[get_Proj_proj(proj)] = proj;
639 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
646 be_emit_cstring(env->emit, "\tcmp ");
647 arm_emit_source_register(env, irn, 0);
648 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
649 be_emit_finish_line_gas(env->emit, irn);
651 be_emit_cstring(env->emit, "\tbhi ");
652 arm_emit_cfop_target(env->emit, default_proj);
653 be_emit_finish_line_gas(env->emit, default_proj);
656 LDR %r12, .TABLE_X_START
657 ADD %r12, %r12, [%1S, LSL #2]
661 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
662 be_emit_finish_line_gas(env->emit, NULL);
664 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
665 arm_emit_source_register(env, irn, 0);
666 be_emit_cstring(env->emit, ", LSL #2");
667 be_emit_finish_line_gas(env->emit, NULL);
669 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
670 be_emit_finish_line_gas(env->emit, NULL);
672 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
673 be_emit_finish_line_gas(env->emit, NULL);
674 be_emit_irprintf(env->emit, "\t.align 2");
675 be_emit_finish_line_gas(env->emit, NULL);
676 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
677 be_emit_finish_line_gas(env->emit, NULL);
679 for (i = 0; i < n_projs; ++i) {
682 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
684 be_emit_cstring(env->emit, "\t.word\t");
685 arm_emit_cfop_target(env->emit, proj);
686 be_emit_finish_line_gas(env->emit, proj);
688 be_emit_irprintf(env->emit, "\t.align 2\n");
689 be_emit_finish_line_gas(env->emit, NULL);
693 /************************************************************************/
695 /************************************************************************/
697 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
698 ir_entity *ent = be_Call_get_entity(irn);
700 be_emit_cstring(env->emit, "\tbl ");
702 set_entity_backend_marked(ent, 1);
703 be_emit_ident(env->emit, get_entity_ld_ident(ent));
705 arm_emit_source_register(env, irn, be_pos_Call_ptr);
707 be_emit_finish_line_gas(env->emit, irn);
710 /** Emit an IncSP node */
711 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
712 int offs = be_get_IncSP_offset(irn);
715 be_emit_cstring(env->emit, "\tadd ");
716 arm_emit_dest_register(env, irn, 0);
717 be_emit_cstring(env->emit, ", ");
718 arm_emit_source_register(env, irn, 0);
719 be_emit_cstring(env->emit, ", #");
720 arm_emit_offset(env, irn);
722 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
723 arm_emit_offset(env, irn);
724 be_emit_cstring(env->emit,") */");
726 be_emit_finish_line_gas(env->emit, irn);
729 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
730 ir_mode *mode = get_irn_mode(irn);
732 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
733 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
734 arm_emit_source_register(env, irn, 0);
735 be_emit_cstring(env->emit, " -> ");
736 arm_emit_dest_register(env, irn, 0);
737 be_emit_finish_line_gas(env->emit, irn);
741 if (mode_is_float(mode)) {
742 if (USE_FPA(env->cg->isa)) {
743 be_emit_cstring(env->emit, "\tmvf");
744 arm_emit_mode(env, irn);
745 be_emit_char(env->emit, ' ');
746 arm_emit_dest_register(env, irn, 0);
747 be_emit_cstring(env->emit, ", ");
748 arm_emit_source_register(env, irn, 0);
749 be_emit_finish_line_gas(env->emit, irn);
751 assert(0 && "move not supported for this mode");
752 panic("emit_be_Copy: move not supported for this mode");
754 } else if (mode_is_numP(mode)) {
755 be_emit_cstring(env->emit, "\tmov ");
756 arm_emit_dest_register(env, irn, 0);
757 be_emit_cstring(env->emit, ", ");
758 arm_emit_source_register(env, irn, 0);
759 be_emit_finish_line_gas(env->emit, irn);
761 assert(0 && "move not supported for this mode");
762 panic("emit_be_Copy: move not supported for this mode");
767 * Emit code for a Spill.
769 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
770 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
772 if (mode_is_float(mode)) {
773 if (USE_FPA(env->cg->isa)) {
774 be_emit_cstring(env->emit, "\tstf");
775 arm_emit_fpa_postfix(env->emit, mode);
776 be_emit_char(env->emit, ' ');
778 assert(0 && "spill not supported for this mode");
779 panic("emit_be_Spill: spill not supported for this mode");
781 } else if (mode_is_dataM(mode)) {
782 be_emit_cstring(env->emit, "\tstr ");
784 assert(0 && "spill not supported for this mode");
785 panic("emit_be_Spill: spill not supported for this mode");
787 arm_emit_source_register(env, irn, 1);
788 be_emit_cstring(env->emit, ", [");
789 arm_emit_source_register(env, irn, 0);
790 be_emit_cstring(env->emit, ", #");
791 arm_emit_offset(env, irn);
792 be_emit_char(env->emit, ']');
793 be_emit_finish_line_gas(env->emit, irn);
797 * Emit code for a Reload.
799 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
800 ir_mode *mode = get_irn_mode(irn);
802 if (mode_is_float(mode)) {
803 if (USE_FPA(env->cg->isa)) {
804 be_emit_cstring(env->emit, "\tldf");
805 arm_emit_fpa_postfix(env->emit, mode);
806 be_emit_char(env->emit, ' ');
808 assert(0 && "reload not supported for this mode");
809 panic("emit_be_Reload: reload not supported for this mode");
811 } else if (mode_is_dataM(mode)) {
812 be_emit_cstring(env->emit, "\tldr ");
814 assert(0 && "reload not supported for this mode");
815 panic("emit_be_Reload: reload not supported for this mode");
817 arm_emit_dest_register(env, irn, 0);
818 be_emit_cstring(env->emit, ", [");
819 arm_emit_source_register(env, irn, 0);
820 be_emit_cstring(env->emit, ", #");
821 arm_emit_offset(env, irn);
822 be_emit_char(env->emit, ']');
823 be_emit_finish_line_gas(env->emit, irn);
826 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
827 be_emit_cstring(env->emit, "\teor ");
828 arm_emit_source_register(env, irn, 0);
829 be_emit_cstring(env->emit, ", ");
830 arm_emit_source_register(env, irn, 0);
831 be_emit_cstring(env->emit, ", ");
832 arm_emit_source_register(env, irn, 1);
833 be_emit_finish_line_gas(env->emit, NULL);
835 be_emit_cstring(env->emit, "\teor ");
836 arm_emit_source_register(env, irn, 1);
837 be_emit_cstring(env->emit, ", ");
838 arm_emit_source_register(env, irn, 0);
839 be_emit_cstring(env->emit, ", ");
840 arm_emit_source_register(env, irn, 1);
841 be_emit_finish_line_gas(env->emit, NULL);
843 be_emit_cstring(env->emit, "\teor ");
844 arm_emit_source_register(env, irn, 0);
845 be_emit_cstring(env->emit, ", ");
846 arm_emit_source_register(env, irn, 0);
847 be_emit_cstring(env->emit, ", ");
848 arm_emit_source_register(env, irn, 1);
849 be_emit_finish_line_gas(env->emit, irn);
852 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
853 ir_mode *mode = get_irn_mode(irn);
855 if (mode_is_float(mode)) {
856 if (USE_FPA(env->cg->isa)) {
857 be_emit_cstring(env->emit,"\tldf");
858 arm_emit_fpa_postfix(env->emit, mode);
859 be_emit_char(env->emit, ' ');
861 assert(0 && "stackparam not supported for this mode");
862 panic("emit_be_StackParam: stackparam not supported for this mode");
865 be_emit_cstring(env->emit,"\tldr ");
867 arm_emit_dest_register(env, irn, 0);
868 be_emit_cstring(env->emit, ", [");
869 arm_emit_source_register(env, irn, 0);
870 be_emit_cstring(env->emit,", #");
871 arm_emit_offset(env, irn);
872 be_emit_finish_line_gas(env->emit, irn);
875 /************************************************************************/
877 /************************************************************************/
879 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
880 ir_node *block, *next_block;
882 /* for now, the code works for scheduled and non-schedules blocks */
883 block = get_nodes_block(node);
885 /* we have a block schedule */
886 next_block = sched_next_block(block);
887 if (get_cfop_target_block(node) != next_block) {
888 be_emit_cstring(env->emit, "\tb ");
889 arm_emit_cfop_target(env->emit, node);
891 be_emit_cstring(env->emit, "\t/* fallthrough to ");
892 arm_emit_cfop_target(env->emit, node);
893 be_emit_cstring(env->emit, " */");
895 be_emit_finish_line_gas(env->emit, node);
898 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
899 be_emit_cstring(env->emit, "\tstfd ");
900 arm_emit_source_register(env, irn, 0);
901 be_emit_cstring(env->emit, ", [sp, #-8]!");
902 be_emit_pad_comment(env->emit);
903 be_emit_cstring(env->emit, "/* Push fp to stack */");
904 be_emit_finish_line_gas(env->emit, NULL);
906 be_emit_cstring(env->emit, "\tldmfd sp!, {");
907 arm_emit_dest_register(env, irn, 1);
908 be_emit_cstring(env->emit, ", ");
909 arm_emit_dest_register(env, irn, 0);
910 be_emit_char(env->emit, '}');
911 be_emit_pad_comment(env->emit);
912 be_emit_cstring(env->emit, "/* Pop destination */");
913 be_emit_finish_line_gas(env->emit, irn);
916 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
919 panic("TLS not supported for this target\n");
920 /* Er... our gcc does not support it... Install a newer toolchain. */
923 /***********************************************************************************
926 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
927 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
928 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
929 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
931 ***********************************************************************************/
933 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
940 * The type of a emitter function.
942 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
945 * Set a node emitter. Make it a bit more type safe.
947 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
948 op->ops.generic = (op_func)arm_emit_node;
952 * Enters the emitter functions for handled nodes into the generic
953 * pointer of an opcode.
955 static void arm_register_emitters(void) {
957 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
958 #define EMIT(a) set_emitter(op_##a, emit_##a)
959 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
960 #define SILENCE(a) set_emitter(op_##a, emit_silence)
962 /* first clear the generic function pointer for all ops */
963 clear_irp_opcodes_generic_func();
965 /* register all emitter functions defined in spec */
966 arm_register_spec_emitters();
968 /* other emitter functions */
971 ARM_EMIT(fpaCmfeBra);
973 // ARM_EMIT(CopyB_i);
999 SILENCE(be_CopyKeep);
1000 SILENCE(be_RegParams);
1001 SILENCE(be_Barrier);
1011 static const char *last_name = NULL;
1012 static unsigned last_line = -1;
1013 static unsigned num = -1;
1016 * Emit the debug support for node node.
1018 static void arm_emit_dbg(arm_emit_env_t *env, const ir_node *irn) {
1019 dbg_info *db = get_irn_dbg_info(irn);
1021 const char *fname = be_retrieve_dbg_info(db, &lineno);
1023 if (! env->cg->birg->main_env->options->stabs_debug_support)
1027 if (last_name != fname) {
1029 be_dbg_include_begin(env->cg->birg->main_env->db_handle, fname);
1032 if (last_line != lineno) {
1035 snprintf(name, sizeof(name), ".LM%u", ++num);
1037 be_dbg_line(env->cg->birg->main_env->db_handle, lineno, name);
1038 be_emit_string(env->emit, name);
1039 be_emit_cstring(env->emit, ":\n");
1040 be_emit_write_line(env->emit);
1046 * Emits code for a node.
1048 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
1049 ir_op *op = get_irn_op(irn);
1051 if (op->ops.generic) {
1052 emit_func *emit = (emit_func *)op->ops.generic;
1053 arm_emit_dbg(env, irn);
1056 be_emit_cstring(env->emit, "\t/* TODO */");
1057 be_emit_finish_line_gas(env->emit, irn);
1062 * emit the block label if needed.
1064 static void arm_emit_block_header(arm_emit_env_t *env, ir_node *block, ir_node *prev)
1069 ir_exec_freq *exec_freq = env->cg->birg->exec_freq;
1070 be_emit_env_t *emit;
1073 n_cfgpreds = get_Block_n_cfgpreds(block);
1074 if (n_cfgpreds == 1) {
1075 ir_node *pred = get_Block_cfgpred(block, 0);
1076 ir_node *pred_block = get_nodes_block(pred);
1078 /* we don't need labels for fallthrough blocks, however switch-jmps
1079 * are no fallthroughs */
1080 if (pred_block == prev &&
1081 !(is_Proj(pred) && is_arm_SwitchJmp(get_Proj_pred(pred)))) {
1092 arm_emit_block_name(emit, block);
1093 be_emit_char(emit, ':');
1095 be_emit_pad_comment(emit);
1096 be_emit_cstring(emit, " /* preds:");
1098 /* emit list of pred blocks in comment */
1099 arity = get_irn_arity(block);
1100 for (i = 0; i < arity; ++i) {
1101 ir_node *predblock = get_Block_cfgpred_block(block, i);
1102 be_emit_irprintf(emit, " %d", get_irn_node_nr(predblock));
1105 be_emit_cstring(emit, "\t/* ");
1106 arm_emit_block_name(emit, block);
1107 be_emit_cstring(emit, ": ");
1109 if (exec_freq != NULL) {
1110 be_emit_irprintf(emit, " freq: %f",
1111 get_block_execfreq(exec_freq, block));
1113 be_emit_cstring(emit, " */\n");
1114 be_emit_write_line(emit);
1118 * Walks over the nodes in a block connected by scheduling edges
1119 * and emits code for each node.
1121 static void arm_gen_block(void *ctx, ir_node *block, ir_node *prev_block) {
1122 arm_emit_env_t *env = ctx;
1125 arm_emit_block_header(env, block, prev_block);
1126 arm_emit_dbg(env, block);
1127 sched_foreach(block, irn) {
1128 arm_emit_node(env, irn);
1133 * Emits code for function start.
1135 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
1136 be_emit_env_t *eenv = env->emit;
1137 ir_entity *ent = get_irg_entity(irg);
1138 const char *irg_name = get_entity_ld_name(ent);
1140 be_emit_write_line(eenv);
1141 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
1142 be_emit_cstring(eenv, "\t.align 2\n");
1144 if (get_entity_visibility(ent) == visibility_external_visible)
1145 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
1146 be_emit_irprintf(eenv, "%s:\n", irg_name);
1150 * Emits code for function end
1152 void arm_emit_end(FILE *F, ir_graph *irg) {
1154 fprintf(F, "\t.ident \"firmcc\"\n");
1159 * Sets labels for control flow nodes (jump target)
1161 static void arm_gen_labels(ir_node *block, void *env) {
1163 int n = get_Block_n_cfgpreds(block);
1166 for (n--; n >= 0; n--) {
1167 pred = get_Block_cfgpred(block, n);
1168 set_irn_link(pred, block);
1173 * Compare two entries of the symbol or tarval set.
1175 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1176 const sym_or_tv *p1 = elt;
1177 const sym_or_tv *p2 = key;
1180 /* as an identifier NEVER can point to a tarval, it's enough
1181 to compare it this way */
1182 return p1->u.generic != p2->u.generic;
1186 * Main driver. Emits the code for one routine.
1188 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1189 arm_emit_env_t emit_env;
1190 ir_node **blk_sched;
1192 ir_node *last_block = NULL;
1194 emit_env.emit = &cg->isa->emit;
1195 emit_env.arch_env = cg->arch_env;
1197 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1198 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1200 /* set the global arch_env (needed by print hooks) */
1201 arch_env = cg->arch_env;
1203 arm_register_emitters();
1205 /* create the block schedule. For now, we don't need it earlier. */
1206 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1208 arm_func_prolog(&emit_env, irg);
1209 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1211 n = ARR_LEN(blk_sched);
1212 for (i = 0; i < n;) {
1213 ir_node *block, *next_bl;
1215 block = blk_sched[i];
1217 next_bl = i < n ? blk_sched[i] : NULL;
1219 /* set here the link. the emitter expects to find the next block here */
1220 set_irn_link(block, next_bl);
1221 arm_gen_block(&emit_env, block, last_block);
1225 /* emit SymConst values */
1226 if (set_count(emit_env.sym_or_tv) > 0) {
1229 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1231 foreach_set(emit_env.sym_or_tv, entry) {
1232 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1234 if (entry->is_ident) {
1235 be_emit_cstring(emit_env.emit, "\t.word\t");
1236 be_emit_ident(emit_env.emit, entry->u.id);
1237 be_emit_char(emit_env.emit, '\n');
1238 be_emit_write_line(emit_env.emit);
1240 tarval *tv = entry->u.tv;
1241 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1244 /* beware: ARM fpa uses big endian format */
1245 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1247 v = get_tarval_sub_bits(tv, i+3);
1248 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1249 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1250 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1251 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1252 be_emit_write_line(emit_env.emit);
1256 be_emit_char(emit_env.emit, '\n');
1257 be_emit_write_line(emit_env.emit);
1259 del_set(emit_env.sym_or_tv);