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) {
455 * Emit a Compare with conditional branch.
457 static void emit_arm_fpaCmfeBra(arm_emit_env_t *env, const ir_node *irn) {
461 * Emit a Compare with conditional branch.
463 static void emit_arm_fpaCnfBra(arm_emit_env_t *env, const ir_node *irn) {
467 * Emit a Compare with conditional branch.
469 static void emit_arm_fpaCnfeBra(arm_emit_env_t *env, const ir_node *irn) {
473 /** Sort register in ascending order. */
474 static int reg_cmp(const void *a, const void *b) {
475 const arch_register_t **ra = a;
476 const arch_register_t **rb = b;
478 return *ra < *rb ? -1 : (*ra != *rb);
482 * Create the CopyB instruction sequence.
484 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
485 unsigned int size = get_tarval_long(get_arm_value(irn));
487 const char *tgt = arch_register_get_name(get_in_reg(env->arch_env, irn, 0));
488 const char *src = arch_register_get_name(get_in_reg(env->arch_env, irn, 1));
489 const char *t0, *t1, *t2, *t3;
492 const arch_register_t *tmpregs[4];
494 /* collect the temporary registers and sort them, we need ascending order */
495 tmpregs[0] = get_in_reg(env->arch_env, irn, 2);
496 tmpregs[1] = get_in_reg(env->arch_env, irn, 3);
497 tmpregs[2] = get_in_reg(env->arch_env, irn, 4);
498 tmpregs[3] = &arm_gp_regs[REG_R12];
500 /* Note: R12 is always the last register because the RA did not assign higher ones */
501 qsort((void *)tmpregs, 3, sizeof(tmpregs[0]), reg_cmp);
503 /* need ascending order */
504 t0 = arch_register_get_name(tmpregs[0]);
505 t1 = arch_register_get_name(tmpregs[1]);
506 t2 = arch_register_get_name(tmpregs[2]);
507 t3 = arch_register_get_name(tmpregs[3]);
509 be_emit_cstring(env->emit, "/* MemCopy (");
510 be_emit_string(env->emit, src);
511 be_emit_cstring(env->emit, ")->(");
512 arm_emit_source_register(env, irn, 0);
513 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
514 be_emit_string(env->emit, t0);
515 be_emit_cstring(env->emit, ", ");
516 be_emit_string(env->emit, t1);
517 be_emit_cstring(env->emit, ", ");
518 be_emit_string(env->emit, t2);
519 be_emit_cstring(env->emit, ", and ");
520 be_emit_string(env->emit, t3);
521 be_emit_cstring(env->emit, "*/");
522 be_emit_finish_line_gas(env->emit, NULL);
524 assert(size > 0 && "CopyB needs size > 0" );
527 assert(!"strange hack enabled: copy more bytes than needed!");
537 be_emit_cstring(emit, "\tldr ");
538 be_emit_string(emit, t3);
539 be_emit_cstring(emit, ", [");
540 be_emit_string(emit, src);
541 be_emit_cstring(emit, ", #0]");
542 be_emit_finish_line_gas(emit, NULL);
544 be_emit_cstring(emit, "\tstr ");
545 be_emit_string(emit, t3);
546 be_emit_cstring(emit, ", [");
547 be_emit_string(emit, tgt);
548 be_emit_cstring(emit, ", #0]");
549 be_emit_finish_line_gas(emit, irn);
552 be_emit_cstring(emit, "\tldmia ");
553 be_emit_string(emit, src);
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, NULL);
561 be_emit_cstring(emit, "\tstmia ");
562 be_emit_string(emit, tgt);
563 be_emit_cstring(emit, "!, {");
564 be_emit_string(emit, t0);
565 be_emit_cstring(emit, ", ");
566 be_emit_string(emit, t1);
567 be_emit_char(emit, '}');
568 be_emit_finish_line_gas(emit, irn);
571 be_emit_cstring(emit, "\tldmia ");
572 be_emit_string(emit, src);
573 be_emit_cstring(emit, "!, {");
574 be_emit_string(emit, t0);
575 be_emit_cstring(emit, ", ");
576 be_emit_string(emit, t1);
577 be_emit_cstring(emit, ", ");
578 be_emit_string(emit, t2);
579 be_emit_char(emit, '}');
580 be_emit_finish_line_gas(emit, NULL);
582 be_emit_cstring(emit, "\tstmia ");
583 be_emit_string(emit, tgt);
584 be_emit_cstring(emit, "!, {");
585 be_emit_string(emit, t0);
586 be_emit_cstring(emit, ", ");
587 be_emit_string(emit, t1);
588 be_emit_cstring(emit, ", ");
589 be_emit_string(emit, t2);
590 be_emit_char(emit, '}');
591 be_emit_finish_line_gas(emit, irn);
596 be_emit_cstring(emit, "\tldmia ");
597 be_emit_string(emit, src);
598 be_emit_cstring(emit, "!, {");
599 be_emit_string(emit, t0);
600 be_emit_cstring(emit, ", ");
601 be_emit_string(emit, t1);
602 be_emit_cstring(emit, ", ");
603 be_emit_string(emit, t2);
604 be_emit_cstring(emit, ", ");
605 be_emit_string(emit, t3);
606 be_emit_char(emit, '}');
607 be_emit_finish_line_gas(emit, NULL);
609 be_emit_cstring(emit, "\tstmia ");
610 be_emit_string(emit, tgt);
611 be_emit_cstring(emit, "!, {");
612 be_emit_string(emit, t0);
613 be_emit_cstring(emit, ", ");
614 be_emit_string(emit, t1);
615 be_emit_cstring(emit, ", ");
616 be_emit_string(emit, t2);
617 be_emit_cstring(emit, ", ");
618 be_emit_string(emit, t3);
619 be_emit_char(emit, '}');
620 be_emit_finish_line_gas(emit, irn);
625 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
626 const ir_edge_t *edge;
632 ir_node *default_proj = NULL;
634 block_nr = get_irn_node_nr(irn);
635 n_projs = get_arm_SwitchJmp_n_projs(irn);
637 projs = xcalloc(n_projs , sizeof(ir_node*));
639 foreach_out_edge(irn, edge) {
640 proj = get_edge_src_irn(edge);
641 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
643 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
646 projs[get_Proj_proj(proj)] = proj;
648 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
655 be_emit_cstring(env->emit, "\tcmp ");
656 arm_emit_source_register(env, irn, 0);
657 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
658 be_emit_finish_line_gas(env->emit, irn);
660 be_emit_cstring(env->emit, "\tbhi ");
661 arm_emit_cfop_target(env->emit, default_proj);
662 be_emit_finish_line_gas(env->emit, default_proj);
665 LDR %r12, .TABLE_X_START
666 ADD %r12, %r12, [%1S, LSL #2]
670 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
671 be_emit_finish_line_gas(env->emit, NULL);
673 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
674 arm_emit_source_register(env, irn, 0);
675 be_emit_cstring(env->emit, ", LSL #2");
676 be_emit_finish_line_gas(env->emit, NULL);
678 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
679 be_emit_finish_line_gas(env->emit, NULL);
681 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
682 be_emit_finish_line_gas(env->emit, NULL);
683 be_emit_irprintf(env->emit, "\t.align 2");
684 be_emit_finish_line_gas(env->emit, NULL);
685 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
686 be_emit_finish_line_gas(env->emit, NULL);
688 for (i = 0; i < n_projs; ++i) {
691 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
693 be_emit_cstring(env->emit, "\t.word\t");
694 arm_emit_cfop_target(env->emit, proj);
695 be_emit_finish_line_gas(env->emit, proj);
697 be_emit_irprintf(env->emit, "\t.align 2\n");
698 be_emit_finish_line_gas(env->emit, NULL);
702 /************************************************************************/
704 /************************************************************************/
706 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
707 ir_entity *ent = be_Call_get_entity(irn);
709 be_emit_cstring(env->emit, "\tbl ");
711 set_entity_backend_marked(ent, 1);
712 be_emit_ident(env->emit, get_entity_ld_ident(ent));
714 arm_emit_source_register(env, irn, be_pos_Call_ptr);
716 be_emit_finish_line_gas(env->emit, irn);
719 /** Emit an IncSP node */
720 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
721 int offs = be_get_IncSP_offset(irn);
724 be_emit_cstring(env->emit, "\tadd ");
725 arm_emit_dest_register(env, irn, 0);
726 be_emit_cstring(env->emit, ", ");
727 arm_emit_source_register(env, irn, 0);
728 be_emit_cstring(env->emit, ", #");
729 arm_emit_offset(env, irn);
731 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
732 arm_emit_offset(env, irn);
733 be_emit_cstring(env->emit,") */");
735 be_emit_finish_line_gas(env->emit, irn);
738 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
739 ir_mode *mode = get_irn_mode(irn);
741 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
742 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
743 arm_emit_source_register(env, irn, 0);
744 be_emit_cstring(env->emit, " -> ");
745 arm_emit_dest_register(env, irn, 0);
746 be_emit_finish_line_gas(env->emit, irn);
750 if (mode_is_float(mode)) {
751 if (USE_FPA(env->cg->isa)) {
752 be_emit_cstring(env->emit, "\tmvf");
753 arm_emit_mode(env, irn);
754 be_emit_char(env->emit, ' ');
755 arm_emit_dest_register(env, irn, 0);
756 be_emit_cstring(env->emit, ", ");
757 arm_emit_source_register(env, irn, 0);
758 be_emit_finish_line_gas(env->emit, irn);
760 assert(0 && "move not supported for this mode");
761 panic("emit_be_Copy: move not supported for this mode");
763 } else if (mode_is_numP(mode)) {
764 be_emit_cstring(env->emit, "\tmov ");
765 arm_emit_dest_register(env, irn, 0);
766 be_emit_cstring(env->emit, ", ");
767 arm_emit_source_register(env, irn, 0);
768 be_emit_finish_line_gas(env->emit, irn);
770 assert(0 && "move not supported for this mode");
771 panic("emit_be_Copy: move not supported for this mode");
776 * Emit code for a Spill.
778 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
779 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
781 if (mode_is_float(mode)) {
782 if (USE_FPA(env->cg->isa)) {
783 be_emit_cstring(env->emit, "\tstf");
784 arm_emit_fpa_postfix(env->emit, mode);
785 be_emit_char(env->emit, ' ');
787 assert(0 && "spill not supported for this mode");
788 panic("emit_be_Spill: spill not supported for this mode");
790 } else if (mode_is_dataM(mode)) {
791 be_emit_cstring(env->emit, "\tstr ");
793 assert(0 && "spill not supported for this mode");
794 panic("emit_be_Spill: spill not supported for this mode");
796 arm_emit_source_register(env, irn, 1);
797 be_emit_cstring(env->emit, ", [");
798 arm_emit_source_register(env, irn, 0);
799 be_emit_cstring(env->emit, ", #");
800 arm_emit_offset(env, irn);
801 be_emit_char(env->emit, ']');
802 be_emit_finish_line_gas(env->emit, irn);
806 * Emit code for a Reload.
808 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
809 ir_mode *mode = get_irn_mode(irn);
811 if (mode_is_float(mode)) {
812 if (USE_FPA(env->cg->isa)) {
813 be_emit_cstring(env->emit, "\tldf");
814 arm_emit_fpa_postfix(env->emit, mode);
815 be_emit_char(env->emit, ' ');
817 assert(0 && "reload not supported for this mode");
818 panic("emit_be_Reload: reload not supported for this mode");
820 } else if (mode_is_dataM(mode)) {
821 be_emit_cstring(env->emit, "\tldr ");
823 assert(0 && "reload not supported for this mode");
824 panic("emit_be_Reload: reload not supported for this mode");
826 arm_emit_dest_register(env, irn, 0);
827 be_emit_cstring(env->emit, ", [");
828 arm_emit_source_register(env, irn, 0);
829 be_emit_cstring(env->emit, ", #");
830 arm_emit_offset(env, irn);
831 be_emit_char(env->emit, ']');
832 be_emit_finish_line_gas(env->emit, irn);
835 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
836 be_emit_cstring(env->emit, "\teor ");
837 arm_emit_source_register(env, irn, 0);
838 be_emit_cstring(env->emit, ", ");
839 arm_emit_source_register(env, irn, 0);
840 be_emit_cstring(env->emit, ", ");
841 arm_emit_source_register(env, irn, 1);
842 be_emit_finish_line_gas(env->emit, NULL);
844 be_emit_cstring(env->emit, "\teor ");
845 arm_emit_source_register(env, irn, 1);
846 be_emit_cstring(env->emit, ", ");
847 arm_emit_source_register(env, irn, 0);
848 be_emit_cstring(env->emit, ", ");
849 arm_emit_source_register(env, irn, 1);
850 be_emit_finish_line_gas(env->emit, NULL);
852 be_emit_cstring(env->emit, "\teor ");
853 arm_emit_source_register(env, irn, 0);
854 be_emit_cstring(env->emit, ", ");
855 arm_emit_source_register(env, irn, 0);
856 be_emit_cstring(env->emit, ", ");
857 arm_emit_source_register(env, irn, 1);
858 be_emit_finish_line_gas(env->emit, irn);
861 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
862 ir_mode *mode = get_irn_mode(irn);
864 if (mode_is_float(mode)) {
865 if (USE_FPA(env->cg->isa)) {
866 be_emit_cstring(env->emit,"\tldf");
867 arm_emit_fpa_postfix(env->emit, mode);
868 be_emit_char(env->emit, ' ');
870 assert(0 && "stackparam not supported for this mode");
871 panic("emit_be_StackParam: stackparam not supported for this mode");
874 be_emit_cstring(env->emit,"\tldr ");
876 arm_emit_dest_register(env, irn, 0);
877 be_emit_cstring(env->emit, ", [");
878 arm_emit_source_register(env, irn, 0);
879 be_emit_cstring(env->emit,", #");
880 arm_emit_offset(env, irn);
881 be_emit_finish_line_gas(env->emit, irn);
884 /************************************************************************/
886 /************************************************************************/
888 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
889 ir_node *block, *next_block;
891 /* for now, the code works for scheduled and non-schedules blocks */
892 block = get_nodes_block(node);
894 /* we have a block schedule */
895 next_block = sched_next_block(block);
896 if (get_cfop_target_block(node) != next_block) {
897 be_emit_cstring(env->emit, "\tb ");
898 arm_emit_cfop_target(env->emit, node);
900 be_emit_cstring(env->emit, "\t/* fallthrough to ");
901 arm_emit_cfop_target(env->emit, node);
902 be_emit_cstring(env->emit, " */");
904 be_emit_finish_line_gas(env->emit, node);
907 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
908 be_emit_cstring(env->emit, "\tstfd ");
909 arm_emit_source_register(env, irn, 0);
910 be_emit_cstring(env->emit, ", [sp, #-8]!");
911 be_emit_pad_comment(env->emit);
912 be_emit_cstring(env->emit, "/* Push fp to stack */");
913 be_emit_finish_line_gas(env->emit, NULL);
915 be_emit_cstring(env->emit, "\tldmfd sp!, {");
916 arm_emit_dest_register(env, irn, 1);
917 be_emit_cstring(env->emit, ", ");
918 arm_emit_dest_register(env, irn, 0);
919 be_emit_char(env->emit, '}');
920 be_emit_pad_comment(env->emit);
921 be_emit_cstring(env->emit, "/* Pop destination */");
922 be_emit_finish_line_gas(env->emit, irn);
925 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
926 panic("TLS not supported for this target\n");
927 /* Er... our gcc does not support it... Install a newer toolchain. */
930 /***********************************************************************************
933 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
934 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
935 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
936 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
938 ***********************************************************************************/
940 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) {
1158 fprintf(F, "\t.ident \"firmcc\"\n");
1163 * Sets labels for control flow nodes (jump target)
1165 static void arm_gen_labels(ir_node *block, void *env) {
1167 int n = get_Block_n_cfgpreds(block);
1170 for (n--; n >= 0; n--) {
1171 pred = get_Block_cfgpred(block, n);
1172 set_irn_link(pred, block);
1177 * Compare two entries of the symbol or tarval set.
1179 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1180 const sym_or_tv *p1 = elt;
1181 const sym_or_tv *p2 = key;
1183 /* as an identifier NEVER can point to a tarval, it's enough
1184 to compare it this way */
1185 return p1->u.generic != p2->u.generic;
1189 * Main driver. Emits the code for one routine.
1191 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1192 arm_emit_env_t emit_env;
1193 ir_node **blk_sched;
1195 ir_node *last_block = NULL;
1197 emit_env.emit = &cg->isa->emit;
1198 emit_env.arch_env = cg->arch_env;
1200 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1201 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1203 /* set the global arch_env (needed by print hooks) */
1204 arch_env = cg->arch_env;
1206 arm_register_emitters();
1208 /* create the block schedule. For now, we don't need it earlier. */
1209 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1211 arm_func_prolog(&emit_env, irg);
1212 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1214 n = ARR_LEN(blk_sched);
1215 for (i = 0; i < n;) {
1216 ir_node *block, *next_bl;
1218 block = blk_sched[i];
1220 next_bl = i < n ? blk_sched[i] : NULL;
1222 /* set here the link. the emitter expects to find the next block here */
1223 set_irn_link(block, next_bl);
1224 arm_gen_block(&emit_env, block, last_block);
1228 /* emit SymConst values */
1229 if (set_count(emit_env.sym_or_tv) > 0) {
1232 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1234 foreach_set(emit_env.sym_or_tv, entry) {
1235 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1237 if (entry->is_ident) {
1238 be_emit_cstring(emit_env.emit, "\t.word\t");
1239 be_emit_ident(emit_env.emit, entry->u.id);
1240 be_emit_char(emit_env.emit, '\n');
1241 be_emit_write_line(emit_env.emit);
1243 tarval *tv = entry->u.tv;
1244 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1247 /* beware: ARM fpa uses big endian format */
1248 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1250 v = get_tarval_sub_bits(tv, i+3);
1251 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1252 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1253 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1254 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1255 be_emit_write_line(emit_env.emit);
1259 be_emit_char(emit_env.emit, '\n');
1260 be_emit_write_line(emit_env.emit);
1262 del_set(emit_env.sym_or_tv);