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);
218 * Returns non-zero if a mode has a Immediate attribute.
220 int is_immediate_node(const ir_node *irn) {
221 const arm_attr_t *attr = get_arm_attr_const(irn);
222 return ARM_GET_SHF_MOD(attr) == ARM_SHF_IMM;
226 * Emit a const or SymConst value.
228 void arm_emit_immediate(arm_emit_env_t *env, const ir_node *node) {
229 if (is_immediate_node(node)) {
230 be_emit_irprintf(env->emit, "#0x%X", arm_decode_imm_w_shift(get_arm_value(node)));
231 } else if (is_arm_SymConst(node))
232 be_emit_ident(env->emit, get_arm_symconst_id(node));
234 assert(!"not a Constant");
239 * Returns the tarval or offset of an arm node as a string.
241 void arm_emit_shift(arm_emit_env_t *env, const ir_node *node) {
242 arm_shift_modifier mod;
244 mod = get_arm_shift_modifier(node);
245 if (ARM_HAS_SHIFT(mod)) {
246 long v = get_tarval_long(get_arm_value(node));
248 be_emit_irprintf(env->emit, ", %s #%l", arm_shf_mod_name(mod), v);
252 /** An entry in the sym_or_tv set. */
253 typedef struct sym_or_tv {
255 ident *id; /**< An ident. */
256 tarval *tv; /**< A tarval. */
257 const void *generic; /**< For generic compare. */
259 unsigned label; /**< the associated label. */
260 char is_ident; /**< Non-zero if an ident is stored. */
264 * Returns a unique label. This number will not be used a second time.
266 static unsigned get_unique_label(void) {
267 static unsigned id = 0;
274 static void emit_arm_SymConst(arm_emit_env_t *env, const ir_node *irn) {
275 sym_or_tv key, *entry;
278 key.u.id = get_arm_symconst_id(irn);
281 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
282 if (entry->label == 0) {
283 /* allocate a label */
284 entry->label = get_unique_label();
286 label = entry->label;
288 /* load the symbol indirect */
289 be_emit_cstring(env->emit, "\tldr ");
290 arm_emit_dest_register(env, irn, 0);
291 be_emit_irprintf(env->emit, ", .L%u", label);
292 be_emit_finish_line_gas(env->emit, irn);
296 * Emit a floating point fpa constant.
298 static void emit_arm_fpaConst(arm_emit_env_t *env, const ir_node *irn) {
299 sym_or_tv key, *entry;
303 key.u.tv = get_arm_value(irn);
306 entry = (sym_or_tv *)set_insert(env->sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
307 if (entry->label == 0) {
308 /* allocate a label */
309 entry->label = get_unique_label();
311 label = entry->label;
313 /* load the tarval indirect */
314 mode = get_irn_mode(irn);
315 be_emit_cstring(env->emit, "\tldf");
316 arm_emit_fpa_postfix(env->emit, mode);
317 be_emit_char(env->emit, ' ');
319 arm_emit_dest_register(env, irn, 0);
320 be_emit_irprintf(env->emit, ", .L%u", label);
321 be_emit_finish_line_gas(env->emit, irn);
325 * Returns the next block in a block schedule.
327 static ir_node *sched_next_block(const ir_node *block) {
328 return get_irn_link(block);
332 * Returns the target block for a control flow node.
334 static ir_node *get_cfop_target_block(const ir_node *irn) {
335 return get_irn_link(irn);
339 * Emits a block label for the given block.
341 static void arm_emit_block_name(be_emit_env_t *emit, const ir_node *block) {
342 be_emit_cstring(emit, BLOCK_PREFIX);
343 be_emit_irprintf(emit, "%d", get_irn_node_nr(block));
347 * Emit the target label for a control flow node.
349 static void arm_emit_cfop_target(be_emit_env_t *emit, const ir_node *irn) {
350 ir_node *block = get_cfop_target_block(irn);
352 arm_emit_block_name(emit, block);
356 * Emit a 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 ir_node *block = get_nodes_block(irn);
398 if (mode_is_float(opmode)) {
399 suffix = "ICHWILLIMPLEMENTIERTWERDEN";
401 be_emit_cstring(env->emit, "\tfcmp ");
402 arm_emit_source_register(env, irn, 0);
403 be_emit_cstring(env->emit, ", ");
404 arm_emit_source_register(env, irn, 1);
405 be_emit_finish_line_gas(env->emit, irn);
407 be_emit_cstring(env->emit, "\tfmstat");
408 be_emit_pad_comment(env->emit);
409 be_emit_cstring(env->emit, "/* FCSPR -> CPSR */");
410 be_emit_finish_line_gas(env->emit, NULL);
412 if (get_cfop_target_block(proj_true) == next_block) {
413 /* exchange both proj's so the second one can be omitted */
414 const ir_node *t = proj_true;
416 proj_true = proj_false;
418 proj_num = get_negated_pnc(proj_num, mode_Iu);
421 case pn_Cmp_Eq: suffix = "eq"; break;
422 case pn_Cmp_Lt: suffix = "lt"; break;
423 case pn_Cmp_Le: suffix = "le"; break;
424 case pn_Cmp_Gt: suffix = "gt"; break;
425 case pn_Cmp_Ge: suffix = "ge"; break;
426 case pn_Cmp_Lg: suffix = "ne"; break;
427 case pn_Cmp_Leg: suffix = "al"; break;
428 default: assert(!"Cmp unsupported"); suffix = "al";
430 be_emit_cstring(env->emit, "\tcmp ");
431 arm_emit_source_register(env, irn, 0);
432 be_emit_cstring(env->emit, ", ");
433 arm_emit_source_register(env, irn, 1);
434 be_emit_finish_line_gas(env->emit, irn);
437 /* emit the true proj */
438 be_emit_irprintf(env->emit, "\tb%s ", suffix);
439 arm_emit_cfop_target(env->emit, proj_true);
440 be_emit_finish_line_gas(env->emit, proj_true);
442 if (get_cfop_target_block(proj_false) == next_block) {
443 be_emit_cstring(env->emit, "\t/* fallthrough to ");
444 arm_emit_cfop_target(env->emit, proj_false);
445 be_emit_cstring(env->emit, " */");
446 be_emit_finish_line_gas(env->emit, proj_false);
448 be_emit_cstring(env->emit, "b ");
449 arm_emit_cfop_target(env->emit, proj_false);
450 be_emit_finish_line_gas(env->emit, proj_false);
456 * Emit a Compare with conditional branch.
458 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) {
468 * Emit a Compare with conditional branch.
470 static void emit_arm_fpaCnfBra(arm_emit_env_t *env, const ir_node *irn) {
474 * Emit a Compare with conditional branch.
476 static void emit_arm_fpaCnfeBra(arm_emit_env_t *env, const ir_node *irn) {
480 /** Sort register in ascending order. */
481 static int reg_cmp(const void *a, const void *b) {
482 const arch_register_t **ra = a;
483 const arch_register_t **rb = b;
485 return *ra < *rb ? -1 : (*ra != *rb);
489 * Create the CopyB instruction sequence.
491 static void emit_arm_CopyB(arm_emit_env_t *env, const ir_node *irn) {
492 unsigned int size = get_tarval_long(get_arm_value(irn));
494 const char *tgt = arch_register_get_name(get_in_reg(env->arch_env, irn, 0));
495 const char *src = arch_register_get_name(get_in_reg(env->arch_env, irn, 1));
496 const char *t0, *t1, *t2, *t3;
499 const arch_register_t *tmpregs[4];
501 /* collect the temporary registers and sort them, we need ascending order */
502 tmpregs[0] = get_in_reg(env->arch_env, irn, 2);
503 tmpregs[1] = get_in_reg(env->arch_env, irn, 3);
504 tmpregs[2] = get_in_reg(env->arch_env, irn, 4);
505 tmpregs[3] = &arm_gp_regs[REG_R12];
507 /* Note: R12 is always the last register because the RA did not assign higher ones */
508 qsort((void *)tmpregs, 3, sizeof(tmpregs[0]), reg_cmp);
510 /* need ascending order */
511 t0 = arch_register_get_name(tmpregs[0]);
512 t1 = arch_register_get_name(tmpregs[1]);
513 t2 = arch_register_get_name(tmpregs[2]);
514 t3 = arch_register_get_name(tmpregs[3]);
516 be_emit_cstring(env->emit, "/* MemCopy (");
517 be_emit_string(env->emit, src);
518 be_emit_cstring(env->emit, ")->(");
519 arm_emit_source_register(env, irn, 0);
520 be_emit_irprintf(env->emit, " [%d bytes], Uses ", size);
521 be_emit_string(env->emit, t0);
522 be_emit_cstring(env->emit, ", ");
523 be_emit_string(env->emit, t1);
524 be_emit_cstring(env->emit, ", ");
525 be_emit_string(env->emit, t2);
526 be_emit_cstring(env->emit, ", and ");
527 be_emit_string(env->emit, t3);
528 be_emit_cstring(env->emit, "*/");
529 be_emit_finish_line_gas(env->emit, NULL);
531 assert(size > 0 && "CopyB needs size > 0" );
534 assert(!"strange hack enabled: copy more bytes than needed!");
544 be_emit_cstring(emit, "\tldr ");
545 be_emit_string(emit, t3);
546 be_emit_cstring(emit, ", [");
547 be_emit_string(emit, src);
548 be_emit_cstring(emit, ", #0]");
549 be_emit_finish_line_gas(emit, NULL);
551 be_emit_cstring(emit, "\tstr ");
552 be_emit_string(emit, t3);
553 be_emit_cstring(emit, ", [");
554 be_emit_string(emit, tgt);
555 be_emit_cstring(emit, ", #0]");
556 be_emit_finish_line_gas(emit, irn);
559 be_emit_cstring(emit, "\tldmia ");
560 be_emit_string(emit, src);
561 be_emit_cstring(emit, "!, {");
562 be_emit_string(emit, t0);
563 be_emit_cstring(emit, ", ");
564 be_emit_string(emit, t1);
565 be_emit_char(emit, '}');
566 be_emit_finish_line_gas(emit, NULL);
568 be_emit_cstring(emit, "\tstmia ");
569 be_emit_string(emit, tgt);
570 be_emit_cstring(emit, "!, {");
571 be_emit_string(emit, t0);
572 be_emit_cstring(emit, ", ");
573 be_emit_string(emit, t1);
574 be_emit_char(emit, '}');
575 be_emit_finish_line_gas(emit, irn);
578 be_emit_cstring(emit, "\tldmia ");
579 be_emit_string(emit, src);
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, NULL);
589 be_emit_cstring(emit, "\tstmia ");
590 be_emit_string(emit, tgt);
591 be_emit_cstring(emit, "!, {");
592 be_emit_string(emit, t0);
593 be_emit_cstring(emit, ", ");
594 be_emit_string(emit, t1);
595 be_emit_cstring(emit, ", ");
596 be_emit_string(emit, t2);
597 be_emit_char(emit, '}');
598 be_emit_finish_line_gas(emit, irn);
603 be_emit_cstring(emit, "\tldmia ");
604 be_emit_string(emit, src);
605 be_emit_cstring(emit, "!, {");
606 be_emit_string(emit, t0);
607 be_emit_cstring(emit, ", ");
608 be_emit_string(emit, t1);
609 be_emit_cstring(emit, ", ");
610 be_emit_string(emit, t2);
611 be_emit_cstring(emit, ", ");
612 be_emit_string(emit, t3);
613 be_emit_char(emit, '}');
614 be_emit_finish_line_gas(emit, NULL);
616 be_emit_cstring(emit, "\tstmia ");
617 be_emit_string(emit, tgt);
618 be_emit_cstring(emit, "!, {");
619 be_emit_string(emit, t0);
620 be_emit_cstring(emit, ", ");
621 be_emit_string(emit, t1);
622 be_emit_cstring(emit, ", ");
623 be_emit_string(emit, t2);
624 be_emit_cstring(emit, ", ");
625 be_emit_string(emit, t3);
626 be_emit_char(emit, '}');
627 be_emit_finish_line_gas(emit, irn);
632 static void emit_arm_SwitchJmp(arm_emit_env_t *env, const ir_node *irn) {
633 const ir_edge_t *edge;
639 ir_node *default_proj = NULL;
641 block_nr = get_irn_node_nr(irn);
642 n_projs = get_arm_SwitchJmp_n_projs(irn);
644 projs = xcalloc(n_projs , sizeof(ir_node*));
646 foreach_out_edge(irn, edge) {
647 proj = get_edge_src_irn(edge);
648 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
650 if (get_Proj_proj(proj) == get_arm_SwitchJmp_default_proj_num(irn))
653 projs[get_Proj_proj(proj)] = proj;
655 assert(default_proj != NULL && "SwitchJmp should have a Default Proj");
662 be_emit_cstring(env->emit, "\tcmp ");
663 arm_emit_source_register(env, irn, 0);
664 be_emit_irprintf(env->emit, ", #%u", n_projs - 1);
665 be_emit_finish_line_gas(env->emit, irn);
667 be_emit_cstring(env->emit, "\tbhi ");
668 arm_emit_cfop_target(env->emit, default_proj);
669 be_emit_finish_line_gas(env->emit, default_proj);
672 LDR %r12, .TABLE_X_START
673 ADD %r12, %r12, [%1S, LSL #2]
677 be_emit_irprintf(env->emit, "\tldr %%r12, TABLE_%d_START", block_nr);
678 be_emit_finish_line_gas(env->emit, NULL);
680 be_emit_irprintf(env->emit, "\tadd %%r12, %%r12, ");
681 arm_emit_source_register(env, irn, 0);
682 be_emit_cstring(env->emit, ", LSL #2");
683 be_emit_finish_line_gas(env->emit, NULL);
685 be_emit_cstring(env->emit, "\tldr %r15, [%r12, #0]");
686 be_emit_finish_line_gas(env->emit, NULL);
688 be_emit_irprintf(env->emit, "TABLE_%d_START:\n\t.word\tTABLE_%d", block_nr, block_nr);
689 be_emit_finish_line_gas(env->emit, NULL);
690 be_emit_irprintf(env->emit, "\t.align 2");
691 be_emit_finish_line_gas(env->emit, NULL);
692 be_emit_irprintf(env->emit, "TABLE_%d:", block_nr);
693 be_emit_finish_line_gas(env->emit, NULL);
695 for (i = 0; i < n_projs; ++i) {
698 proj = projs[get_arm_SwitchJmp_default_proj_num(irn)];
700 be_emit_cstring(env->emit, "\t.word\t");
701 arm_emit_cfop_target(env->emit, proj);
702 be_emit_finish_line_gas(env->emit, proj);
704 be_emit_irprintf(env->emit, "\t.align 2\n");
705 be_emit_finish_line_gas(env->emit, NULL);
709 /************************************************************************/
711 /************************************************************************/
713 static void emit_be_Call(arm_emit_env_t *env, const ir_node *irn) {
714 ir_entity *ent = be_Call_get_entity(irn);
716 be_emit_cstring(env->emit, "\tbl ");
718 set_entity_backend_marked(ent, 1);
719 be_emit_ident(env->emit, get_entity_ld_ident(ent));
721 arm_emit_source_register(env, irn, be_pos_Call_ptr);
723 be_emit_finish_line_gas(env->emit, irn);
726 /** Emit an IncSP node */
727 static void emit_be_IncSP(arm_emit_env_t *env, const ir_node *irn) {
728 int offs = be_get_IncSP_offset(irn);
731 be_emit_cstring(env->emit, "\tadd ");
732 arm_emit_dest_register(env, irn, 0);
733 be_emit_cstring(env->emit, ", ");
734 arm_emit_source_register(env, irn, 0);
735 be_emit_cstring(env->emit, ", #");
736 arm_emit_offset(env, irn);
738 be_emit_cstring(env->emit, "\t/* omitted IncSP(");
739 arm_emit_offset(env, irn);
740 be_emit_cstring(env->emit,") */");
742 be_emit_finish_line_gas(env->emit, irn);
745 static void emit_be_Copy(arm_emit_env_t *env, const ir_node *irn) {
746 ir_mode *mode = get_irn_mode(irn);
748 if (get_in_reg(env->arch_env, irn, 0) == get_out_reg(env->arch_env, irn, 0)) {
749 be_emit_cstring(env->emit, "\t/* omitted Copy: ");
750 arm_emit_source_register(env, irn, 0);
751 be_emit_cstring(env->emit, " -> ");
752 arm_emit_dest_register(env, irn, 0);
753 be_emit_finish_line_gas(env->emit, irn);
757 if (mode_is_float(mode)) {
758 if (USE_FPA(env->cg->isa)) {
759 be_emit_cstring(env->emit, "\tmvf");
760 arm_emit_mode(env, irn);
761 be_emit_char(env->emit, ' ');
762 arm_emit_dest_register(env, irn, 0);
763 be_emit_cstring(env->emit, ", ");
764 arm_emit_source_register(env, irn, 0);
765 be_emit_finish_line_gas(env->emit, irn);
767 assert(0 && "move not supported for this mode");
768 panic("emit_be_Copy: move not supported for this mode");
770 } else if (mode_is_numP(mode)) {
771 be_emit_cstring(env->emit, "\tmov ");
772 arm_emit_dest_register(env, irn, 0);
773 be_emit_cstring(env->emit, ", ");
774 arm_emit_source_register(env, irn, 0);
775 be_emit_finish_line_gas(env->emit, irn);
777 assert(0 && "move not supported for this mode");
778 panic("emit_be_Copy: move not supported for this mode");
783 * Emit code for a Spill.
785 static void emit_be_Spill(arm_emit_env_t *env, const ir_node *irn) {
786 ir_mode *mode = get_irn_mode(be_get_Spill_val(irn));
788 if (mode_is_float(mode)) {
789 if (USE_FPA(env->cg->isa)) {
790 be_emit_cstring(env->emit, "\tstf");
791 arm_emit_fpa_postfix(env->emit, mode);
792 be_emit_char(env->emit, ' ');
794 assert(0 && "spill not supported for this mode");
795 panic("emit_be_Spill: spill not supported for this mode");
797 } else if (mode_is_dataM(mode)) {
798 be_emit_cstring(env->emit, "\tstr ");
800 assert(0 && "spill not supported for this mode");
801 panic("emit_be_Spill: spill not supported for this mode");
803 arm_emit_source_register(env, irn, 1);
804 be_emit_cstring(env->emit, ", [");
805 arm_emit_source_register(env, irn, 0);
806 be_emit_cstring(env->emit, ", #");
807 arm_emit_offset(env, irn);
808 be_emit_char(env->emit, ']');
809 be_emit_finish_line_gas(env->emit, irn);
813 * Emit code for a Reload.
815 static void emit_be_Reload(arm_emit_env_t *env, const ir_node *irn) {
816 ir_mode *mode = get_irn_mode(irn);
818 if (mode_is_float(mode)) {
819 if (USE_FPA(env->cg->isa)) {
820 be_emit_cstring(env->emit, "\tldf");
821 arm_emit_fpa_postfix(env->emit, mode);
822 be_emit_char(env->emit, ' ');
824 assert(0 && "reload not supported for this mode");
825 panic("emit_be_Reload: reload not supported for this mode");
827 } else if (mode_is_dataM(mode)) {
828 be_emit_cstring(env->emit, "\tldr ");
830 assert(0 && "reload not supported for this mode");
831 panic("emit_be_Reload: reload not supported for this mode");
833 arm_emit_dest_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_offset(env, irn);
838 be_emit_char(env->emit, ']');
839 be_emit_finish_line_gas(env->emit, irn);
842 static void emit_be_Perm(arm_emit_env_t *env, const ir_node *irn) {
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, NULL);
851 be_emit_cstring(env->emit, "\teor ");
852 arm_emit_source_register(env, irn, 1);
853 be_emit_cstring(env->emit, ", ");
854 arm_emit_source_register(env, irn, 0);
855 be_emit_cstring(env->emit, ", ");
856 arm_emit_source_register(env, irn, 1);
857 be_emit_finish_line_gas(env->emit, NULL);
859 be_emit_cstring(env->emit, "\teor ");
860 arm_emit_source_register(env, irn, 0);
861 be_emit_cstring(env->emit, ", ");
862 arm_emit_source_register(env, irn, 0);
863 be_emit_cstring(env->emit, ", ");
864 arm_emit_source_register(env, irn, 1);
865 be_emit_finish_line_gas(env->emit, irn);
868 static void emit_be_StackParam(arm_emit_env_t *env, const ir_node *irn) {
869 ir_mode *mode = get_irn_mode(irn);
871 if (mode_is_float(mode)) {
872 if (USE_FPA(env->cg->isa)) {
873 be_emit_cstring(env->emit,"\tldf");
874 arm_emit_fpa_postfix(env->emit, mode);
875 be_emit_char(env->emit, ' ');
877 assert(0 && "stackparam not supported for this mode");
878 panic("emit_be_StackParam: stackparam not supported for this mode");
881 be_emit_cstring(env->emit,"\tldr ");
883 arm_emit_dest_register(env, irn, 0);
884 be_emit_cstring(env->emit, ", [");
885 arm_emit_source_register(env, irn, 0);
886 be_emit_cstring(env->emit,", #");
887 arm_emit_offset(env, irn);
888 be_emit_finish_line_gas(env->emit, irn);
891 /************************************************************************/
893 /************************************************************************/
895 static void emit_Jmp(arm_emit_env_t *env, const ir_node *node) {
896 ir_node *block, *next_block;
898 /* for now, the code works for scheduled and non-schedules blocks */
899 block = get_nodes_block(node);
901 /* we have a block schedule */
902 next_block = sched_next_block(block);
903 if (get_cfop_target_block(node) != next_block) {
904 be_emit_cstring(env->emit, "\tb ");
905 arm_emit_cfop_target(env->emit, node);
907 be_emit_cstring(env->emit, "\t/* fallthrough to ");
908 arm_emit_cfop_target(env->emit, node);
909 be_emit_cstring(env->emit, " */");
911 be_emit_finish_line_gas(env->emit, node);
914 static void emit_arm_fpaDbl2GP(arm_emit_env_t *env, const ir_node *irn) {
915 be_emit_cstring(env->emit, "\tstfd ");
916 arm_emit_source_register(env, irn, 0);
917 be_emit_cstring(env->emit, ", [sp, #-8]!");
918 be_emit_pad_comment(env->emit);
919 be_emit_cstring(env->emit, "/* Push fp to stack */");
920 be_emit_finish_line_gas(env->emit, NULL);
922 be_emit_cstring(env->emit, "\tldmfd sp!, {");
923 arm_emit_dest_register(env, irn, 1);
924 be_emit_cstring(env->emit, ", ");
925 arm_emit_dest_register(env, irn, 0);
926 be_emit_char(env->emit, '}');
927 be_emit_pad_comment(env->emit);
928 be_emit_cstring(env->emit, "/* Pop destination */");
929 be_emit_finish_line_gas(env->emit, irn);
932 static void emit_arm_LdTls(arm_emit_env_t *env, const ir_node *irn) {
933 panic("TLS not supported for this target\n");
934 /* Er... our gcc does not support it... Install a newer toolchain. */
937 /***********************************************************************************
940 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
941 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
942 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
943 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
945 ***********************************************************************************/
947 static void emit_silence(arm_emit_env_t *env, const ir_node *irn) {
952 * The type of a emitter function.
954 typedef void (emit_func)(arm_emit_env_t *env, const ir_node *irn);
957 * Set a node emitter. Make it a bit more type safe.
959 static INLINE void set_emitter(ir_op *op, emit_func arm_emit_node) {
960 op->ops.generic = (op_func)arm_emit_node;
964 * Enters the emitter functions for handled nodes into the generic
965 * pointer of an opcode.
967 static void arm_register_emitters(void) {
969 #define ARM_EMIT(a) set_emitter(op_arm_##a, emit_arm_##a)
970 #define EMIT(a) set_emitter(op_##a, emit_##a)
971 #define BE_EMIT(a) set_emitter(op_be_##a, emit_be_##a)
972 #define SILENCE(a) set_emitter(op_##a, emit_silence)
974 /* first clear the generic function pointer for all ops */
975 clear_irp_opcodes_generic_func();
977 /* register all emitter functions defined in spec */
978 arm_register_spec_emitters();
980 /* other emitter functions */
983 ARM_EMIT(fpaCmfeBra);
985 // ARM_EMIT(CopyB_i);
1000 BE_EMIT(StackParam);
1011 SILENCE(be_CopyKeep);
1012 SILENCE(be_RegParams);
1013 SILENCE(be_Barrier);
1023 static const char *last_name = NULL;
1024 static unsigned last_line = -1;
1025 static unsigned num = -1;
1028 * Emit the debug support for node node.
1030 static void arm_emit_dbg(arm_emit_env_t *env, const ir_node *irn) {
1031 dbg_info *db = get_irn_dbg_info(irn);
1033 const char *fname = be_retrieve_dbg_info(db, &lineno);
1035 if (! env->cg->birg->main_env->options->stabs_debug_support)
1039 if (last_name != fname) {
1041 be_dbg_include_begin(env->cg->birg->main_env->db_handle, fname);
1044 if (last_line != lineno) {
1047 snprintf(name, sizeof(name), ".LM%u", ++num);
1049 be_dbg_line(env->cg->birg->main_env->db_handle, lineno, name);
1050 be_emit_string(env->emit, name);
1051 be_emit_cstring(env->emit, ":\n");
1052 be_emit_write_line(env->emit);
1058 * Emits code for a node.
1060 static void arm_emit_node(arm_emit_env_t *env, const ir_node *irn) {
1061 ir_op *op = get_irn_op(irn);
1063 if (op->ops.generic) {
1064 emit_func *emit = (emit_func *)op->ops.generic;
1065 arm_emit_dbg(env, irn);
1068 be_emit_cstring(env->emit, "\t/* TODO */");
1069 be_emit_finish_line_gas(env->emit, irn);
1074 * emit the block label if needed.
1076 static void arm_emit_block_header(arm_emit_env_t *env, ir_node *block, ir_node *prev)
1081 ir_exec_freq *exec_freq = env->cg->birg->exec_freq;
1082 be_emit_env_t *emit;
1085 n_cfgpreds = get_Block_n_cfgpreds(block);
1086 if (n_cfgpreds == 1) {
1087 ir_node *pred = get_Block_cfgpred(block, 0);
1088 ir_node *pred_block = get_nodes_block(pred);
1090 /* we don't need labels for fallthrough blocks, however switch-jmps
1091 * are no fallthroughs */
1092 if (pred_block == prev &&
1093 !(is_Proj(pred) && is_arm_SwitchJmp(get_Proj_pred(pred)))) {
1104 arm_emit_block_name(emit, block);
1105 be_emit_char(emit, ':');
1107 be_emit_pad_comment(emit);
1108 be_emit_cstring(emit, " /* preds:");
1110 /* emit list of pred blocks in comment */
1111 arity = get_irn_arity(block);
1112 for (i = 0; i < arity; ++i) {
1113 ir_node *predblock = get_Block_cfgpred_block(block, i);
1114 be_emit_irprintf(emit, " %d", get_irn_node_nr(predblock));
1117 be_emit_cstring(emit, "\t/* ");
1118 arm_emit_block_name(emit, block);
1119 be_emit_cstring(emit, ": ");
1121 if (exec_freq != NULL) {
1122 be_emit_irprintf(emit, " freq: %f",
1123 get_block_execfreq(exec_freq, block));
1125 be_emit_cstring(emit, " */\n");
1126 be_emit_write_line(emit);
1130 * Walks over the nodes in a block connected by scheduling edges
1131 * and emits code for each node.
1133 static void arm_gen_block(void *ctx, ir_node *block, ir_node *prev_block) {
1134 arm_emit_env_t *env = ctx;
1137 arm_emit_block_header(env, block, prev_block);
1138 arm_emit_dbg(env, block);
1139 sched_foreach(block, irn) {
1140 arm_emit_node(env, irn);
1145 * Emits code for function start.
1147 void arm_func_prolog(arm_emit_env_t *env, ir_graph *irg) {
1148 be_emit_env_t *eenv = env->emit;
1149 ir_entity *ent = get_irg_entity(irg);
1150 const char *irg_name = get_entity_ld_name(ent);
1152 be_emit_write_line(eenv);
1153 be_gas_emit_switch_section(eenv, GAS_SECTION_TEXT);
1154 be_emit_cstring(eenv, "\t.align 2\n");
1156 if (get_entity_visibility(ent) == visibility_external_visible)
1157 be_emit_irprintf(eenv, "\t.global %s\n", irg_name);
1158 be_emit_irprintf(eenv, "%s:\n", irg_name);
1162 * Emits code for function end
1164 void arm_emit_end(FILE *F, ir_graph *irg) {
1165 fprintf(F, "\t.ident \"firmcc\"\n");
1170 * Sets labels for control flow nodes (jump target)
1172 static void arm_gen_labels(ir_node *block, void *env) {
1174 int n = get_Block_n_cfgpreds(block);
1177 for (n--; n >= 0; n--) {
1178 pred = get_Block_cfgpred(block, n);
1179 set_irn_link(pred, block);
1184 * Compare two entries of the symbol or tarval set.
1186 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
1187 const sym_or_tv *p1 = elt;
1188 const sym_or_tv *p2 = key;
1190 /* as an identifier NEVER can point to a tarval, it's enough
1191 to compare it this way */
1192 return p1->u.generic != p2->u.generic;
1196 * Main driver. Emits the code for one routine.
1198 void arm_gen_routine(const arm_code_gen_t *cg, ir_graph *irg) {
1199 arm_emit_env_t emit_env;
1200 ir_node **blk_sched;
1202 ir_node *last_block = NULL;
1204 emit_env.emit = &cg->isa->emit;
1205 emit_env.arch_env = cg->arch_env;
1207 emit_env.sym_or_tv = new_set(cmp_sym_or_tv, 8);
1208 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.arm.emit");
1210 /* set the global arch_env (needed by print hooks) */
1211 arch_env = cg->arch_env;
1213 arm_register_emitters();
1215 /* create the block schedule. For now, we don't need it earlier. */
1216 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
1218 arm_func_prolog(&emit_env, irg);
1219 irg_block_walk_graph(irg, arm_gen_labels, NULL, &emit_env);
1221 n = ARR_LEN(blk_sched);
1222 for (i = 0; i < n;) {
1223 ir_node *block, *next_bl;
1225 block = blk_sched[i];
1227 next_bl = i < n ? blk_sched[i] : NULL;
1229 /* set here the link. the emitter expects to find the next block here */
1230 set_irn_link(block, next_bl);
1231 arm_gen_block(&emit_env, block, last_block);
1235 /* emit SymConst values */
1236 if (set_count(emit_env.sym_or_tv) > 0) {
1239 be_emit_cstring(emit_env.emit, "\t.align 2\n");
1241 foreach_set(emit_env.sym_or_tv, entry) {
1242 be_emit_irprintf(emit_env.emit, ".L%u:\n", entry->label);
1244 if (entry->is_ident) {
1245 be_emit_cstring(emit_env.emit, "\t.word\t");
1246 be_emit_ident(emit_env.emit, entry->u.id);
1247 be_emit_char(emit_env.emit, '\n');
1248 be_emit_write_line(emit_env.emit);
1250 tarval *tv = entry->u.tv;
1251 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
1254 /* beware: ARM fpa uses big endian format */
1255 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
1257 v = get_tarval_sub_bits(tv, i+3);
1258 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
1259 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
1260 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
1261 be_emit_irprintf(emit_env.emit, "\t.word\t%u\n", v);
1262 be_emit_write_line(emit_env.emit);
1266 be_emit_char(emit_env.emit, '\n');
1267 be_emit_write_line(emit_env.emit);
1269 del_set(emit_env.sym_or_tv);