2 * Copyright (C) 1995-2008 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
22 * @brief emit assembler for a backend graph
40 #include "raw_bitset.h"
43 #include "../besched.h"
44 #include "../beblocksched.h"
46 #include "../begnuas.h"
47 #include "../be_dbgout.h"
48 #include "../benode.h"
50 #include "sparc_emitter.h"
51 #include "gen_sparc_emitter.h"
52 #include "sparc_nodes_attr.h"
53 #include "sparc_new_nodes.h"
55 #define SNPRINTF_BUF_LEN 128
56 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
59 * attribute of SAVE node which follows immediatelly after the START node
60 * we need this to correct all offsets since SPARC expects
61 * some reserved stack space after the stackpointer
63 const sparc_save_attr_t *save_attr;
66 * Returns the register at in position pos.
68 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
71 const arch_register_t *reg = NULL;
73 assert(get_irn_arity(node) > pos && "Invalid IN position");
75 /* The out register of the operator at position pos is the
76 in register we need. */
77 op = get_irn_n(node, pos);
79 reg = arch_get_irn_register(op);
81 assert(reg && "no in register found");
86 * Returns the register at out position pos.
88 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
91 const arch_register_t *reg = NULL;
93 /* 1st case: irn is not of mode_T, so it has only */
94 /* one OUT register -> good */
95 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
96 /* Proj with the corresponding projnum for the register */
98 if (get_irn_mode(node) != mode_T) {
99 reg = arch_get_irn_register(node);
100 } else if (is_sparc_irn(node)) {
101 reg = arch_irn_get_register(node, pos);
103 const ir_edge_t *edge;
105 foreach_out_edge(node, edge) {
106 proj = get_edge_src_irn(edge);
107 assert(is_Proj(proj) && "non-Proj from mode_T node");
108 if (get_Proj_proj(proj) == pos) {
109 reg = arch_get_irn_register(proj);
115 assert(reg && "no out register found");
119 /*************************************************************
121 * (_) | | / _| | | | |
122 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
123 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
124 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
125 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
128 *************************************************************/
130 void sparc_emit_immediate(const ir_node *node)
132 // TODO: make sure it's a valid simm13 ?
133 const sparc_attr_t *attr = get_sparc_attr_const(node);
135 assert(!(attr->immediate_value < -4096 || attr->immediate_value > 4096));
137 be_emit_irprintf("%d", attr->immediate_value);
140 void sparc_emit_source_register(const ir_node *node, int pos)
142 const arch_register_t *reg = get_in_reg(node, pos);
144 be_emit_string(arch_register_get_name(reg));
147 void sparc_emit_dest_register(const ir_node *node, int pos)
149 const arch_register_t *reg = get_out_reg(node, pos);
151 be_emit_string(arch_register_get_name(reg));
155 * Emits either a imm or register depending on arity of node
157 * @param register no (-1 if no register)
159 void sparc_emit_reg_or_imm(const ir_node *node, int pos)
161 if (get_irn_arity(node) > pos) {
163 sparc_emit_source_register(node, pos);
165 // we have a imm input
166 sparc_emit_immediate(node);
173 void sparc_emit_offset(const ir_node *node)
175 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
176 assert(attr->base.is_load_store);
178 if (attr->offset > 0)
179 be_emit_irprintf("+%ld", attr->offset);
184 * Emit load mode char
186 void sparc_emit_load_mode(const ir_node *node)
188 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
189 ir_mode *mode = attr->load_store_mode;
190 int bits = get_mode_size_bits(mode);
191 bool is_signed = mode_is_signed(mode);
194 be_emit_string(is_signed ? "sh" : "uh");
195 } else if (bits == 8) {
196 be_emit_string(is_signed ? "sb" : "ub");
197 } else if (bits == 64) {
205 * Emit store mode char
207 void sparc_emit_store_mode(const ir_node *node)
209 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
210 ir_mode *mode = attr->load_store_mode;
211 int bits = get_mode_size_bits(mode);
215 } else if (bits == 8) {
217 } else if (bits == 64) {
225 * Returns the target label for a control flow node.
227 static void sparc_emit_cfop_target(const ir_node *node)
229 ir_node *block = get_irn_link(node);
230 be_gas_emit_block_name(block);
236 static void sparc_emit_entity(ir_entity *entity)
238 be_emit_ident(get_entity_ld_ident(entity));
241 /***********************************************************************************
244 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
245 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
246 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
247 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
249 ***********************************************************************************/
253 * Emits code for stack space management
255 static void emit_be_IncSP(const ir_node *irn)
257 int offs = -be_get_IncSP_offset(irn);
262 /* SPARC stack grows downwards */
264 be_emit_cstring("\tsub ");
267 be_emit_cstring("\tadd ");
270 sparc_emit_source_register(irn, 0);
271 be_emit_irprintf(", %d", offs);
272 be_emit_cstring(", ");
273 sparc_emit_dest_register(irn, 0);
274 be_emit_finish_line_gas(irn);
278 * emits code for save instruction
279 * and sets the current save_attr pointer
281 static void emit_sparc_Save(const ir_node *irn)
283 save_attr = get_sparc_save_attr_const(irn);
284 be_emit_cstring("\tsave ");
285 sparc_emit_source_register(irn, 0);
286 be_emit_irprintf(", %d, ", -save_attr->initial_stacksize);
287 sparc_emit_dest_register(irn, 0);
288 be_emit_finish_line_gas(irn);
292 * emits code to load hi 22 bit of a constant
294 static void emit_sparc_HiImm(const ir_node *irn)
296 const sparc_attr_t *attr = get_sparc_attr_const(irn);
297 be_emit_cstring("\tsethi ");
298 be_emit_irprintf("%%hi(%d), ", attr->immediate_value);
299 sparc_emit_dest_register(irn, 0);
300 be_emit_finish_line_gas(irn);
304 * emits code to load lo 10bits of a constant
306 static void emit_sparc_LoImm(const ir_node *irn)
308 const sparc_attr_t *attr = get_sparc_attr_const(irn);
309 be_emit_cstring("\tor ");
310 sparc_emit_source_register(irn, 0);
311 be_emit_irprintf(", %%lo(%d), ", attr->immediate_value);
312 sparc_emit_dest_register(irn, 0);
313 be_emit_finish_line_gas(irn);
318 * Emits code for return node
320 static void emit_be_Return(const ir_node *irn)
322 be_emit_cstring("\tret");
323 be_emit_finish_line_gas(irn);
324 be_emit_cstring("\trestore");
325 be_emit_finish_line_gas(irn);
329 * Emits code for Call node
331 static void emit_be_Call(const ir_node *irn)
333 ir_entity *entity = be_Call_get_entity(irn);
335 if (entity != NULL) {
336 be_emit_cstring("\tcall ");
337 sparc_emit_entity(entity);
338 be_emit_finish_line_gas(irn);
339 be_emit_cstring("\tnop");
340 be_emit_pad_comment();
341 be_emit_cstring("/* TODO: use delay slot */\n");
343 be_emit_cstring("\tnop\n");
344 be_emit_pad_comment();
345 be_emit_cstring("/* TODO: Entity == NULL */\n");
346 be_emit_finish_line_gas(irn);
351 * TODO: check if this is correct
353 static void emit_be_Perm(const ir_node *irn)
355 be_emit_cstring("\txor ");
356 sparc_emit_source_register(irn, 1);
357 be_emit_cstring(", ");
358 sparc_emit_source_register(irn, 0);
359 be_emit_cstring(", ");
360 sparc_emit_source_register(irn, 0);
361 be_emit_finish_line_gas(NULL);
363 be_emit_cstring("\txor ");
364 sparc_emit_source_register(irn, 1);
365 be_emit_cstring(", ");
366 sparc_emit_source_register(irn, 0);
367 be_emit_cstring(", ");
368 sparc_emit_source_register(irn, 1);
369 be_emit_finish_line_gas(NULL);
371 be_emit_cstring("\txor ");
372 sparc_emit_source_register(irn, 1);
373 be_emit_cstring(", ");
374 sparc_emit_source_register(irn, 0);
375 be_emit_cstring(", ");
376 sparc_emit_source_register(irn, 0);
377 be_emit_finish_line_gas(irn);
383 static void emit_sparc_SymConst(const ir_node *irn)
385 const sparc_symconst_attr_t *attr = get_sparc_symconst_attr_const(irn);
386 ident *id_symconst = get_entity_ident(attr->entity);
387 const char *label = get_id_str(id_symconst);
389 //sethi %hi(const32),%reg
390 //or %reg,%lo(const32),%reg
392 be_emit_irprintf("\tsethi %%hi(%s), ", label);
393 sparc_emit_dest_register(irn, 0);
394 be_emit_cstring("\n ");
396 // TODO: could be combined with the following load/store instruction
397 be_emit_cstring("\tor ");
398 sparc_emit_dest_register(irn, 0);
399 be_emit_irprintf(", %%lo(%s), ", label);
400 sparc_emit_dest_register(irn, 0);
401 be_emit_finish_line_gas(irn);
406 * Emits code for FrameAddr fix
408 static void emit_sparc_FrameAddr(const ir_node *irn)
410 const sparc_symconst_attr_t *attr = get_irn_generic_attr_const(irn);
412 // no need to fix offset as we are adressing via the framepointer
413 if (attr->fp_offset >= 0) {
414 be_emit_cstring("\tadd ");
415 sparc_emit_source_register(irn, 0);
416 be_emit_cstring(", ");
417 be_emit_irprintf("%ld", attr->fp_offset + save_attr->initial_stacksize);
419 be_emit_cstring("\tsub ");
420 sparc_emit_source_register(irn, 0);
421 be_emit_cstring(", ");
422 be_emit_irprintf("%ld", -attr->fp_offset);
425 be_emit_cstring(", ");
426 sparc_emit_dest_register(irn, 0);
427 be_emit_finish_line_gas(irn);
432 * Emits code for Branch
434 static void emit_sparc_Branch(const ir_node *irn)
436 const ir_edge_t *edge;
437 const ir_node *proj_true = NULL;
438 const ir_node *proj_false = NULL;
439 const ir_node *block;
440 const ir_node *next_block;
441 ir_node *op1 = get_irn_n(irn, 0);
443 int proj_num = get_sparc_jmp_cond_proj_num(irn);
444 const sparc_cmp_attr_t *cmp_attr = get_irn_generic_attr_const(op1);
445 // bool is_signed = !cmp_attr->is_unsigned;
447 assert(is_sparc_Cmp(op1) || is_sparc_Tst(op1));
449 foreach_out_edge(irn, edge) {
450 ir_node *proj = get_edge_src_irn(edge);
451 long nr = get_Proj_proj(proj);
452 if (nr == pn_Cond_true) {
459 if (cmp_attr->ins_permuted) {
460 proj_num = get_mirrored_pnc(proj_num);
463 /* for now, the code works for scheduled and non-schedules blocks */
464 block = get_nodes_block(irn);
466 /* we have a block schedule */
467 next_block = get_irn_link(block);
469 assert(proj_num != pn_Cmp_False);
470 assert(proj_num != pn_Cmp_True);
472 if (get_irn_link(proj_true) == next_block) {
473 /* exchange both proj's so the second one can be omitted */
474 const ir_node *t = proj_true;
476 proj_true = proj_false;
478 proj_num = get_negated_pnc(proj_num, mode_Iu);
483 case pn_Cmp_Eq: suffix = "e"; break;
484 case pn_Cmp_Lt: suffix = "l"; break;
485 case pn_Cmp_Le: suffix = "le"; break;
486 case pn_Cmp_Gt: suffix = "g"; break;
487 case pn_Cmp_Ge: suffix = "ge"; break;
488 case pn_Cmp_Lg: suffix = "ne"; break;
489 case pn_Cmp_Leg: suffix = "a"; break;
490 default: panic("Cmp has unsupported pnc");
493 /* emit the true proj */
494 be_emit_irprintf("\tb%s ", suffix);
495 sparc_emit_cfop_target(proj_true);
496 be_emit_finish_line_gas(proj_true);
498 be_emit_cstring("\tnop");
499 be_emit_pad_comment();
500 be_emit_cstring("/* TODO: use delay slot */\n");
502 if (get_irn_link(proj_false) == next_block) {
503 be_emit_cstring("\t/* false-fallthrough to ");
504 sparc_emit_cfop_target(proj_false);
505 be_emit_cstring(" */");
506 be_emit_finish_line_gas(proj_false);
508 be_emit_cstring("\tba ");
509 sparc_emit_cfop_target(proj_false);
510 be_emit_finish_line_gas(proj_false);
511 be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
512 be_emit_finish_line_gas(proj_false);
517 * emit Jmp (which actually is a branch always (ba) instruction)
519 static void emit_sparc_Jmp(const ir_node *node)
521 ir_node *block, *next_block;
523 /* for now, the code works for scheduled and non-schedules blocks */
524 block = get_nodes_block(node);
526 /* we have a block schedule */
527 next_block = get_irn_link(block);
528 if (get_irn_link(node) != next_block) {
529 be_emit_cstring("\tba ");
530 sparc_emit_cfop_target(node);
531 be_emit_finish_line_gas(node);
532 be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
534 be_emit_cstring("\t/* fallthrough to ");
535 sparc_emit_cfop_target(node);
536 be_emit_cstring(" */");
538 be_emit_finish_line_gas(node);
544 static void emit_be_Copy(const ir_node *irn)
546 ir_mode *mode = get_irn_mode(irn);
548 if (get_in_reg(irn, 0) == get_out_reg(irn, 0)) {
553 if (mode_is_float(mode)) {
554 panic("emit_be_Copy: move not supported for FP");
555 } else if (mode_is_data(mode)) {
556 be_emit_cstring("\tmov ");
557 sparc_emit_source_register(irn, 0);
558 be_emit_cstring(", ");
559 sparc_emit_dest_register(irn, 0);
560 be_emit_finish_line_gas(irn);
562 panic("emit_be_Copy: move not supported for this mode");
568 * dummy emitter for ignored nodes
570 static void emit_nothing(const ir_node *irn)
578 * type of emitter function
580 typedef void (*emit_func) (const ir_node *);
583 * Set a node emitter. Make it a bit more type safe.
585 static inline void set_emitter(ir_op *op, emit_func sparc_emit_node)
587 op->ops.generic = (op_func)sparc_emit_node;
591 * Enters the emitter functions for handled nodes into the generic
592 * pointer of an opcode.
594 static void sparc_register_emitters(void)
597 /* first clear the generic function pointer for all ops */
598 clear_irp_opcodes_generic_func();
600 /* register all emitter functions defined in spec */
601 sparc_register_spec_emitters();
604 set_emitter(op_be_IncSP, emit_be_IncSP);
605 set_emitter(op_be_Return, emit_be_Return);
606 set_emitter(op_be_Call, emit_be_Call);
607 set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
608 set_emitter(op_sparc_Branch, emit_sparc_Branch);
609 set_emitter(op_sparc_SymConst, emit_sparc_SymConst);
610 set_emitter(op_sparc_Jmp, emit_sparc_Jmp);
611 set_emitter(op_sparc_Save, emit_sparc_Save);
613 set_emitter(op_sparc_HiImm, emit_sparc_HiImm);
614 set_emitter(op_sparc_LoImm, emit_sparc_LoImm);
616 set_emitter(op_be_Copy, emit_be_Copy);
617 set_emitter(op_be_CopyKeep, emit_be_Copy);
619 set_emitter(op_be_Perm, emit_be_Perm);
622 set_emitter(op_arm_B, emit_arm_B);
623 set_emitter(op_arm_CopyB, emit_arm_CopyB);
624 set_emitter(op_arm_fpaConst, emit_arm_fpaConst);
625 set_emitter(op_arm_fpaDbl2GP, emit_arm_fpaDbl2GP);
626 set_emitter(op_arm_LdTls, emit_arm_LdTls);
627 set_emitter(op_arm_SwitchJmp, emit_arm_SwitchJmp);
628 set_emitter(op_be_MemPerm, emit_be_MemPerm);
631 /* no need to emit anything for the following nodes */
632 set_emitter(op_Phi, emit_nothing);
633 set_emitter(op_be_Keep, emit_nothing);
634 set_emitter(op_be_Start, emit_nothing);
635 set_emitter(op_be_Barrier, emit_nothing);
640 * Emits code for a node.
642 static void sparc_emit_node(const ir_node *node)
644 ir_op *op = get_irn_op(node);
646 if (op->ops.generic) {
647 emit_func func = (emit_func) op->ops.generic;
648 be_dbg_set_dbg_info(get_irn_dbg_info(node));
651 panic("Error: No emit handler for node %+F (graph %+F)\n",
652 node, current_ir_graph);
657 * Walks over the nodes in a block connected by scheduling edges
658 * and emits code for each node.
660 static void sparc_gen_block(ir_node *block, void *data)
665 if (! is_Block(block))
668 be_gas_emit_block_name(block);
669 be_emit_cstring(":\n");
670 be_emit_write_line();
672 sched_foreach(block, node) {
673 sparc_emit_node(node);
679 * Emits code for function start.
681 static void sparc_emit_func_prolog(ir_graph *irg)
683 ir_entity *ent = get_irg_entity(irg);
684 be_gas_emit_function_prolog(ent, 4);
685 be_emit_write_line();
689 * Emits code for function end
691 static void sparc_emit_func_epilog(ir_graph *irg)
693 ir_entity *ent = get_irg_entity(irg);
694 const char *irg_name = get_entity_ld_name(ent);
695 be_emit_write_line();
696 be_emit_irprintf("\t.size %s, .-%s\n", irg_name, irg_name);
697 be_emit_cstring("# -- End ");
698 be_emit_string(irg_name);
699 be_emit_cstring("\n");
700 be_emit_write_line();
705 * TODO: Sets labels for control flow nodes (jump target).
706 * Links control predecessors to there destination blocks.
708 static void sparc_gen_labels(ir_node *block, void *env)
711 int n = get_Block_n_cfgpreds(block);
714 for (n--; n >= 0; n--) {
715 pred = get_Block_cfgpred(block, n);
716 set_irn_link(pred, block); // link the pred of a block (which is a jmp)
724 void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
727 ir_node *last_block = NULL;
728 ir_entity *entity = get_irg_entity(irg);
731 be_gas_elf_type_char = '#';
733 /* register all emitter functions */
734 sparc_register_emitters();
735 be_dbg_method_begin(entity, be_abi_get_stack_layout(cg->birg->abi));
737 /* create the block schedule. For now, we don't need it earlier. */
738 blk_sched = be_create_block_schedule(cg->irg, cg->birg->exec_freq);
740 // emit function prolog
741 sparc_emit_func_prolog(irg);
743 // generate BLOCK labels
744 irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);
746 // inject block scheduling links & emit code of each block
747 n = ARR_LEN(blk_sched);
748 for (i = 0; i < n;) {
749 ir_node *block, *next_bl;
751 block = blk_sched[i];
753 next_bl = i < n ? blk_sched[i] : NULL;
755 /* set here the link. the emitter expects to find the next block here */
756 set_irn_link(block, next_bl);
757 sparc_gen_block(block, last_block);
762 //irg_walk_blkwise_graph(irg, NULL, sparc_gen_block, NULL);
764 // emit function epilog
765 sparc_emit_func_epilog(irg);
768 void sparc_init_emitter(void)
770 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.emit");