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 if (has_Block_label(block)) {
338 be_emit_string(emit, be_gas_label_prefix());
339 be_emit_irprintf(emit, "%lu", get_Block_label(block));
341 be_emit_cstring(emit, BLOCK_PREFIX);
342 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 Compare with conditional branch.
358 static void emit_arm_CmpBra(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 if (mode_is_float(opmode)) {
397 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
399 be_emit_cstring(env->emit, "\tfcmp ");
400 arm_emit_source_register(env, irn, 0);
401 be_emit_cstring(env->emit, ", ");
402 arm_emit_source_register(env, irn, 1);
403 be_emit_finish_line_gas(env->emit, irn);
405 be_emit_cstring(env->emit, "\tfmstat");
406 be_emit_pad_comment(env->emit);
407 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
408 be_emit_finish_line_gas(env->emit, NULL);
410 if (get_cfop_target_block(proj_true) == next_block) {
411 /* exchange both proj's so the second one can be omitted */
412 const ir_node *t = proj_true;
414 proj_true = proj_false;
416 proj_num = get_negated_pnc(proj_num, mode_Iu);
419 case pn_Cmp_Eq: suffix = "eq"; break;
420 case pn_Cmp_Lt: suffix = "lt"; break;
421 case pn_Cmp_Le: suffix = "le"; break;
422 case pn_Cmp_Gt: suffix = "gt"; break;
423 case pn_Cmp_Ge: suffix = "ge"; break;
424 case pn_Cmp_Lg: suffix = "ne"; break;
425 case pn_Cmp_Leg: suffix = "al"; break;
426 default: assert(!"Cmp unsupported"); suffix = "al";
428 be_emit_cstring(env->emit, "\tcmp ");
429 arm_emit_source_register(env, irn, 0);
430 be_emit_cstring(env->emit, ", ");
431 arm_emit_source_register(env, irn, 1);
432 be_emit_finish_line_gas(env->emit, irn);
435 /* emit the true proj */
436 be_emit_irprintf(env->emit, "\tb%s ", suffix);
437 arm_emit_cfop_target(env->emit, proj_true);
438 be_emit_finish_line_gas(env->emit, proj_true);
440 if (get_cfop_target_block(proj_false) == next_block) {
441 be_emit_cstring(env->emit, "\t/* fallthrough to ");
442 arm_emit_cfop_target(env->emit, proj_false);
443 be_emit_cstring(env->emit, " */");
444 be_emit_finish_line_gas(env->emit, proj_false);
446 be_emit_cstring(env->emit, "b ");
447 arm_emit_cfop_target(env->emit, proj_false);
448 be_emit_finish_line_gas(env->emit, proj_false);
454 * Emit a Compare with conditional branch.
456 static void emit_arm_fpaCmfBra(arm_emit_env_t *env, const ir_node *irn) {
462 * Emit a Compare with conditional branch.
464 static void emit_arm_fpaCmfeBra(arm_emit_env_t *env, const ir_node *irn) {
469 /** Sort register in ascending order. */
470 static int reg_cmp(const void *a, const void *b) {
471 const arch_register_t * const *ra = a;
472 const arch_register_t * const *rb = b;
474 return *ra < *rb ? -1 : (*ra != *rb);
478 * Create the CopyB instruction sequence.
480 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
481 unsigned int size = get_tarval_long(get_arm_value(irn));
483 const char *tgt = arch_register_get_name(get_in_reg(env->arch_env, irn, 0));
484 const char *src = arch_register_get_name(get_in_reg(env->arch_env, irn, 1));
485 const char *t0, *t1, *t2, *t3;
488 const arch_register_t *tmpregs[4];
490 /* collect the temporary registers and sort them, we need ascending order */
491 tmpregs[0] = get_in_reg(env->arch_env, irn, 2);
492 tmpregs[1] = get_in_reg(env->arch_env, irn, 3);
493 tmpregs[2] = get_in_reg(env->arch_env, irn, 4);
494 tmpregs[3] = &arm_gp_regs[REG_R12];
496 /* Note: R12 is always the last register because the RA did not assign higher ones */
497 qsort((void *)tmpregs, 3, sizeof(tmpregs[0]), reg_cmp);
499 /* need ascending order */
500 t0 = arch_register_get_name(tmpregs[0]);
501 t1 = arch_register_get_name(tmpregs[1]);
502 t2 = arch_register_get_name(tmpregs[2]);
503 t3 = arch_register_get_name(tmpregs[3]);
505 be_emit_cstring(env->emit, "/* MemCopy (");
506 be_emit_string(env->emit, src);
507 be_emit_cstring(env->emit, ")->(");
508 arm_emit_source_register(env, irn, 0);
509 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
510 be_emit_string(env->emit, t0);
511 be_emit_cstring(env->emit, ", ");
512 be_emit_string(env->emit, t1);
513 be_emit_cstring(env->emit, ", ");
514 be_emit_string(env->emit, t2);
515 be_emit_cstring(env->emit, ", and ");
516 be_emit_string(env->emit, t3);
517 be_emit_cstring(env->emit, "*/");
518 be_emit_finish_line_gas(env->emit, NULL);
520 assert(size > 0 && "CopyB needs size > 0" );
523 assert(!"strange hack enabled: copy more bytes than needed!");
533 be_emit_cstring(emit, "\tldr ");
534 be_emit_string(emit, t3);
535 be_emit_cstring(emit, ", [");
536 be_emit_string(emit, src);
537 be_emit_cstring(emit, ", #0]");
538 be_emit_finish_line_gas(emit, NULL);
540 be_emit_cstring(emit, "\tstr ");
541 be_emit_string(emit, t3);
542 be_emit_cstring(emit, ", [");
543 be_emit_string(emit, tgt);
544 be_emit_cstring(emit, ", #0]");
545 be_emit_finish_line_gas(emit, irn);
548 be_emit_cstring(emit, "\tldmia ");
549 be_emit_string(emit, src);
550 be_emit_cstring(emit, "!, {");
551 be_emit_string(emit, t0);
552 be_emit_cstring(emit, ", ");
553 be_emit_string(emit, t1);
554 be_emit_char(emit, '}');
555 be_emit_finish_line_gas(emit, NULL);
557 be_emit_cstring(emit, "\tstmia ");
558 be_emit_string(emit, tgt);
559 be_emit_cstring(emit, "!, {");
560 be_emit_string(emit, t0);
561 be_emit_cstring(emit, ", ");
562 be_emit_string(emit, t1);
563 be_emit_char(emit, '}');
564 be_emit_finish_line_gas(emit, irn);
567 be_emit_cstring(emit, "\tldmia ");
568 be_emit_string(emit, src);
569 be_emit_cstring(emit, "!, {");
570 be_emit_string(emit, t0);
571 be_emit_cstring(emit, ", ");
572 be_emit_string(emit, t1);
573 be_emit_cstring(emit, ", ");
574 be_emit_string(emit, t2);
575 be_emit_char(emit, '}');
576 be_emit_finish_line_gas(emit, NULL);
578 be_emit_cstring(emit, "\tstmia ");
579 be_emit_string(emit, tgt);
580 be_emit_cstring(emit, "!, {");
581 be_emit_string(emit, t0);
582 be_emit_cstring(emit, ", ");
583 be_emit_string(emit, t1);
584 be_emit_cstring(emit, ", ");
585 be_emit_string(emit, t2);
586 be_emit_char(emit, '}');
587 be_emit_finish_line_gas(emit, irn);
592 be_emit_cstring(emit, "\tldmia ");
593 be_emit_string(emit, src);
594 be_emit_cstring(emit, "!, {");
595 be_emit_string(emit, t0);
596 be_emit_cstring(emit, ", ");
597 be_emit_string(emit, t1);
598 be_emit_cstring(emit, ", ");
599 be_emit_string(emit, t2);
600 be_emit_cstring(emit, ", ");
601 be_emit_string(emit, t3);
602 be_emit_char(emit, '}');
603 be_emit_finish_line_gas(emit, NULL);
605 be_emit_cstring(emit, "\tstmia ");
606 be_emit_string(emit, tgt);
607 be_emit_cstring(emit, "!, {");
608 be_emit_string(emit, t0);
609 be_emit_cstring(emit, ", ");
610 be_emit_string(emit, t1);
611 be_emit_cstring(emit, ", ");
612 be_emit_string(emit, t2);
613 be_emit_cstring(emit, ", ");
614 be_emit_string(emit, t3);
615 be_emit_char(emit, '}');
616 be_emit_finish_line_gas(emit, irn);
621 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
622 const ir_edge_t *edge;
628 ir_node *default_proj = NULL;
630 block_nr = get_irn_node_nr(irn);
631 n_projs = get_arm_SwitchJmp_n_projs(irn);
633 projs = xcalloc(n_projs , sizeof(ir_node*));
635 foreach_out_edge(irn, edge) {
636 proj = get_edge_src_irn(edge);
637 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
639 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
642 projs[get_Proj_proj(proj)] = proj;
644 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
651 be_emit_cstring(env->emit, "\tcmp ");
652 arm_emit_source_register(env, irn, 0);
653 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
654 be_emit_finish_line_gas(env->emit, irn);
656 be_emit_cstring(env->emit, "\tbhi ");
657 arm_emit_cfop_target(env->emit, default_proj);
658 be_emit_finish_line_gas(env->emit, default_proj);
661 LDR %r12, .TABLE_X_START
662 ADD %r12, %r12, [%1S, LSL #2]
666 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
667 be_emit_finish_line_gas(env->emit, NULL);
669 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
670 arm_emit_source_register(env, irn, 0);
671 be_emit_cstring(env->emit, ", LSL #2");
672 be_emit_finish_line_gas(env->emit, NULL);
674 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
675 be_emit_finish_line_gas(env->emit, NULL);
677 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
678 be_emit_finish_line_gas(env->emit, NULL);
679 be_emit_irprintf(env->emit, "\t.align 2");
680 be_emit_finish_line_gas(env->emit, NULL);
681 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
682 be_emit_finish_line_gas(env->emit, NULL);
684 for (i = 0; i < n_projs; ++i) {
687 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
689 be_emit_cstring(env->emit, "\t.word\t");
690 arm_emit_cfop_target(env->emit, proj);
691 be_emit_finish_line_gas(env->emit, proj);
693 be_emit_irprintf(env->emit, "\t.align 2\n");
694 be_emit_finish_line_gas(env->emit, NULL);
698 /************************************************************************/
700 /************************************************************************/
702 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
703 ir_entity *ent = be_Call_get_entity(irn);
705 be_emit_cstring(env->emit, "\tbl ");
707 set_entity_backend_marked(ent, 1);
708 be_emit_ident(env->emit, get_entity_ld_ident(ent));
710 arm_emit_source_register(env, irn, be_pos_Call_ptr);
712 be_emit_finish_line_gas(env->emit, irn);
715 /** Emit an IncSP node */
716 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
717 int offs = be_get_IncSP_offset(irn);
720 be_emit_cstring(env->emit, "\tadd ");
721 arm_emit_dest_register(env, irn, 0);
722 be_emit_cstring(env->emit, ", ");
723 arm_emit_source_register(env, irn, 0);
724 be_emit_cstring(env->emit, ", #");
725 arm_emit_offset(env, irn);
727 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
728 arm_emit_offset(env, irn);
729 be_emit_cstring(env->emit,") */");
731 be_emit_finish_line_gas(env->emit, irn);
734 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
735 ir_mode *mode = get_irn_mode(irn);
737 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
738 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
739 arm_emit_source_register(env, irn, 0);
740 be_emit_cstring(env->emit, " -> ");
741 arm_emit_dest_register(env, irn, 0);
742 be_emit_finish_line_gas(env->emit, irn);
746 if (mode_is_float(mode)) {
747 if (USE_FPA(env->cg->isa)) {
748 be_emit_cstring(env->emit, "\tmvf");
749 arm_emit_mode(env, irn);
750 be_emit_char(env->emit, ' ');
751 arm_emit_dest_register(env, irn, 0);
752 be_emit_cstring(env->emit, ", ");
753 arm_emit_source_register(env, irn, 0);
754 be_emit_finish_line_gas(env->emit, irn);
756 assert(0 && "move not supported for this mode");
757 panic("emit_be_Copy: move not supported for this mode");
759 } else if (mode_is_data(mode)) {
760 be_emit_cstring(env->emit, "\tmov ");
761 arm_emit_dest_register(env, irn, 0);
762 be_emit_cstring(env->emit, ", ");
763 arm_emit_source_register(env, irn, 0);
764 be_emit_finish_line_gas(env->emit, irn);
766 assert(0 && "move not supported for this mode");
767 panic("emit_be_Copy: move not supported for this mode");
772 * Emit code for a Spill.
774 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
775 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
777 if (mode_is_float(mode)) {
778 if (USE_FPA(env->cg->isa)) {
779 be_emit_cstring(env->emit, "\tstf");
780 arm_emit_fpa_postfix(env->emit, mode);
781 be_emit_char(env->emit, ' ');
783 assert(0 && "spill not supported for this mode");
784 panic("emit_be_Spill: spill not supported for this mode");
786 } else if (mode_is_dataM(mode)) {
787 be_emit_cstring(env->emit, "\tstr ");
789 assert(0 && "spill not supported for this mode");
790 panic("emit_be_Spill: spill not supported for this mode");
792 arm_emit_source_register(env, irn, 1);
793 be_emit_cstring(env->emit, ", [");
794 arm_emit_source_register(env, irn, 0);
795 be_emit_cstring(env->emit, ", #");
796 arm_emit_offset(env, irn);
797 be_emit_char(env->emit, ']');
798 be_emit_finish_line_gas(env->emit, irn);
802 * Emit code for a Reload.
804 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
805 ir_mode *mode = get_irn_mode(irn);
807 if (mode_is_float(mode)) {
808 if (USE_FPA(env->cg->isa)) {
809 be_emit_cstring(env->emit, "\tldf");
810 arm_emit_fpa_postfix(env->emit, mode);
811 be_emit_char(env->emit, ' ');
813 assert(0 && "reload not supported for this mode");
814 panic("emit_be_Reload: reload not supported for this mode");
816 } else if (mode_is_dataM(mode)) {
817 be_emit_cstring(env->emit, "\tldr ");
819 assert(0 && "reload not supported for this mode");
820 panic("emit_be_Reload: reload not supported for this mode");
822 arm_emit_dest_register(env, irn, 0);
823 be_emit_cstring(env->emit, ", [");
824 arm_emit_source_register(env, irn, 0);
825 be_emit_cstring(env->emit, ", #");
826 arm_emit_offset(env, irn);
827 be_emit_char(env->emit, ']');
828 be_emit_finish_line_gas(env->emit, irn);
831 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
832 be_emit_cstring(env->emit, "\teor ");
833 arm_emit_source_register(env, irn, 0);
834 be_emit_cstring(env->emit, ", ");
835 arm_emit_source_register(env, irn, 0);
836 be_emit_cstring(env->emit, ", ");
837 arm_emit_source_register(env, irn, 1);
838 be_emit_finish_line_gas(env->emit, NULL);
840 be_emit_cstring(env->emit, "\teor ");
841 arm_emit_source_register(env, irn, 1);
842 be_emit_cstring(env->emit, ", ");
843 arm_emit_source_register(env, irn, 0);
844 be_emit_cstring(env->emit, ", ");
845 arm_emit_source_register(env, irn, 1);
846 be_emit_finish_line_gas(env->emit, NULL);
848 be_emit_cstring(env->emit, "\teor ");
849 arm_emit_source_register(env, irn, 0);
850 be_emit_cstring(env->emit, ", ");
851 arm_emit_source_register(env, irn, 0);
852 be_emit_cstring(env->emit, ", ");
853 arm_emit_source_register(env, irn, 1);
854 be_emit_finish_line_gas(env->emit, irn);
857 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
858 ir_mode *mode = get_irn_mode(irn);
860 if (mode_is_float(mode)) {
861 if (USE_FPA(env->cg->isa)) {
862 be_emit_cstring(env->emit,"\tldf");
863 arm_emit_fpa_postfix(env->emit, mode);
864 be_emit_char(env->emit, ' ');
866 assert(0 && "stackparam not supported for this mode");
867 panic("emit_be_StackParam: stackparam not supported for this mode");
870 be_emit_cstring(env->emit,"\tldr ");
872 arm_emit_dest_register(env, irn, 0);
873 be_emit_cstring(env->emit, ", [");
874 arm_emit_source_register(env, irn, 0);
875 be_emit_cstring(env->emit,", #");
876 arm_emit_offset(env, irn);
877 be_emit_finish_line_gas(env->emit, irn);
880 /************************************************************************/
882 /************************************************************************/
884 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
885 ir_node *block, *next_block;
887 /* for now, the code works for scheduled and non-schedules blocks */
888 block = get_nodes_block(node);
890 /* we have a block schedule */
891 next_block = sched_next_block(block);
892 if (get_cfop_target_block(node) != next_block) {
893 be_emit_cstring(env->emit, "\tb ");
894 arm_emit_cfop_target(env->emit, node);
896 be_emit_cstring(env->emit, "\t/* fallthrough to ");
897 arm_emit_cfop_target(env->emit, node);
898 be_emit_cstring(env->emit, " */");
900 be_emit_finish_line_gas(env->emit, node);
903 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
904 be_emit_cstring(env->emit, "\tstfd ");
905 arm_emit_source_register(env, irn, 0);
906 be_emit_cstring(env->emit, ", [sp, #-8]!");
907 be_emit_pad_comment(env->emit);
908 be_emit_cstring(env->emit, "/* Push fp to stack */");
909 be_emit_finish_line_gas(env->emit, NULL);
911 be_emit_cstring(env->emit, "\tldmfd sp!, {");
912 arm_emit_dest_register(env, irn, 1);
913 be_emit_cstring(env->emit, ", ");
914 arm_emit_dest_register(env, irn, 0);
915 be_emit_char(env->emit, '}');
916 be_emit_pad_comment(env->emit);
917 be_emit_cstring(env->emit, "/* Pop destination */");
918 be_emit_finish_line_gas(env->emit, irn);
921 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
924 panic("TLS not supported for this target\n");
925 /* Er... our gcc does not support it... Install a newer toolchain. */
928 /***********************************************************************************
931 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
932 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
933 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
934 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
936 ***********************************************************************************/
938 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
945 * The type of a emitter function.
947 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
950 * Set a node emitter. Make it a bit more type safe.
952 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
953 op->ops.generic = (op_func)arm_emit_node;
957 * Enters the emitter functions for handled nodes into the generic
958 * pointer of an opcode.
960 static void arm_register_emitters(void) {
962 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
963 #define EMIT(a) set_emitter(op_##a, emit_##a)
964 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
965 #define SILENCE(a) set_emitter(op_##a, emit_silence)
967 /* first clear the generic function pointer for all ops */
968 clear_irp_opcodes_generic_func();
970 /* register all emitter functions defined in spec */
971 arm_register_spec_emitters();
973 /* other emitter functions */
976 ARM_EMIT(fpaCmfeBra);
978 // ARM_EMIT(CopyB_i);
1004 SILENCE(be_CopyKeep);
1005 SILENCE(be_RegParams);
1006 SILENCE(be_Barrier);
1016 static const char *last_name = NULL;
1017 static unsigned last_line = -1;
1018 static unsigned num = -1;
1021 * Emit the debug support for node node.
1023 static void arm_emit_dbg(arm_emit_env_t *env, const ir_node *irn) {
1024 dbg_info *db = get_irn_dbg_info(irn);
1026 const char *fname = be_retrieve_dbg_info(db, &lineno);
1028 if (! env->cg->birg->main_env->options->stabs_debug_support)
1032 if (last_name != fname) {
1034 be_dbg_include_begin(env->cg->birg->main_env->db_handle, fname);
1037 if (last_line != lineno) {
1040 snprintf(name, sizeof(name), ".LM%u", ++num);
1042 be_dbg_line(env->cg->birg->main_env->db_handle, lineno, name);
1043 be_emit_string(env->emit, name);
1044 be_emit_cstring(env->emit, ":\n");
1045 be_emit_write_line(env->emit);
1051 * Emits code for a node.
1053 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
1054 ir_op *op = get_irn_op(irn);
1056 if (op->ops.generic) {
1057 emit_func *emit = (emit_func *)op->ops.generic;
1058 arm_emit_dbg(env, irn);
1061 be_emit_cstring(env->emit, "\t/* TODO */");
1062 be_emit_finish_line_gas(env->emit, irn);
1067 * emit the block label if needed.
1069 static void arm_emit_block_header(arm_emit_env_t *env, ir_node *block, ir_node *prev)
1074 ir_exec_freq *exec_freq = env->cg->birg->exec_freq;
1075 be_emit_env_t *emit;
1078 n_cfgpreds = get_Block_n_cfgpreds(block);
1079 if (n_cfgpreds == 1) {
1080 ir_node *pred = get_Block_cfgpred(block, 0);
1081 ir_node *pred_block = get_nodes_block(pred);
1083 /* we don't need labels for fallthrough blocks, however switch-jmps
1084 * are no fallthroughs */
1085 if (pred_block == prev &&
1086 !(is_Proj(pred) && is_arm_SwitchJmp(get_Proj_pred(pred)))) {
1097 arm_emit_block_name(emit, block);
1098 be_emit_char(emit, ':');
1100 be_emit_pad_comment(emit);
1101 be_emit_cstring(emit, " /* preds:");
1103 /* emit list of pred blocks in comment */
1104 arity = get_irn_arity(block);
1105 for (i = 0; i < arity; ++i) {
1106 ir_node *predblock = get_Block_cfgpred_block(block, i);
1107 be_emit_irprintf(emit, " %d", get_irn_node_nr(predblock));
1110 be_emit_cstring(emit, "\t/* ");
1111 arm_emit_block_name(emit, block);
1112 be_emit_cstring(emit, ": ");
1114 if (exec_freq != NULL) {
1115 be_emit_irprintf(emit, " freq: %f",
1116 get_block_execfreq(exec_freq, block));
1118 be_emit_cstring(emit, " */\n");
1119 be_emit_write_line(emit);
1123 * Walks over the nodes in a block connected by scheduling edges
1124 * and emits code for each node.
1126 static void arm_gen_block(void *ctx, ir_node *block, ir_node *prev_block) {
1127 arm_emit_env_t *env = ctx;
1130 arm_emit_block_header(env, block, prev_block);
1131 arm_emit_dbg(env, block);
1132 sched_foreach(block, irn) {
1133 arm_emit_node(env, irn);
1138 * Emits code for function start.
1140 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
1141 be_emit_env_t *eenv = env->emit;
1142 ir_entity *ent = get_irg_entity(irg);
1143 const char *irg_name = get_entity_ld_name(ent);
1145 be_emit_write_line(eenv);
1146 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
1147 be_emit_cstring(eenv, "\t.align 2\n");
1149 if (get_entity_visibility(ent) == visibility_external_visible)
1150 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
1151 be_emit_irprintf(eenv, "%s:\n", irg_name);
1155 * Emits code for function end
1157 void arm_emit_end(FILE *F, ir_graph *irg) {
1159 fprintf(F, "\t.ident \"firmcc\"\n");
1164 * Sets labels for control flow nodes (jump target)
1166 static void arm_gen_labels(ir_node *block, void *env) {
1168 int n = get_Block_n_cfgpreds(block);
1171 for (n--; n >= 0; n--) {
1172 pred = get_Block_cfgpred(block, n);
1173 set_irn_link(pred, block);
1178 * Compare two entries of the symbol or tarval set.
1180 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1181 const sym_or_tv *p1 = elt;
1182 const sym_or_tv *p2 = key;
1185 /* as an identifier NEVER can point to a tarval, it's enough
1186 to compare it this way */
1187 return p1->u.generic != p2->u.generic;
1191 * Main driver. Emits the code for one routine.
1193 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1194 arm_emit_env_t emit_env;
1195 ir_node **blk_sched;
1197 ir_node *last_block = NULL;
1199 emit_env.emit = &cg->isa->emit;
1200 emit_env.arch_env = cg->arch_env;
1202 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1203 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1205 /* set the global arch_env (needed by print hooks) */
1206 arch_env = cg->arch_env;
1208 arm_register_emitters();
1210 /* create the block schedule. For now, we don't need it earlier. */
1211 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1213 arm_func_prolog(&emit_env, irg);
1214 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1216 n = ARR_LEN(blk_sched);
1217 for (i = 0; i < n;) {
1218 ir_node *block, *next_bl;
1220 block = blk_sched[i];
1222 next_bl = i < n ? blk_sched[i] : NULL;
1224 /* set here the link. the emitter expects to find the next block here */
1225 set_irn_link(block, next_bl);
1226 arm_gen_block(&emit_env, block, last_block);
1230 /* emit SymConst values */
1231 if (set_count(emit_env.sym_or_tv) > 0) {
1234 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1236 foreach_set(emit_env.sym_or_tv, entry) {
1237 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1239 if (entry->is_ident) {
1240 be_emit_cstring(emit_env.emit, "\t.word\t");
1241 be_emit_ident(emit_env.emit, entry->u.id);
1242 be_emit_char(emit_env.emit, '\n');
1243 be_emit_write_line(emit_env.emit);
1245 tarval *tv = entry->u.tv;
1246 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1249 /* beware: ARM fpa uses big endian format */
1250 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1252 v = get_tarval_sub_bits(tv, i+3);
1253 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1254 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1255 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1256 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1257 be_emit_write_line(emit_env.emit);
1261 be_emit_char(emit_env.emit, '\n');
1262 be_emit_write_line(emit_env.emit);
1264 del_set(emit_env.sym_or_tv);