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
23 * @version $Id: sparc_emitter.c 26542 2009-09-18 09:18:32Z matze $
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;)
58 static set *sym_or_tv;
61 * Returns the register at in position pos.
63 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
66 const arch_register_t *reg = NULL;
68 assert(get_irn_arity(node) > pos && "Invalid IN position");
70 /* The out register of the operator at position pos is the
71 in register we need. */
72 op = get_irn_n(node, pos);
74 reg = arch_get_irn_register(op);
76 assert(reg && "no in register found");
81 * Returns the register at out position pos.
83 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
86 const arch_register_t *reg = NULL;
88 /* 1st case: irn is not of mode_T, so it has only */
89 /* one OUT register -> good */
90 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
91 /* Proj with the corresponding projnum for the register */
93 if (get_irn_mode(node) != mode_T) {
94 reg = arch_get_irn_register(node);
95 } else if (is_sparc_irn(node)) {
96 reg = arch_irn_get_register(node, pos);
98 const ir_edge_t *edge;
100 foreach_out_edge(node, edge) {
101 proj = get_edge_src_irn(edge);
102 assert(is_Proj(proj) && "non-Proj from mode_T node");
103 if (get_Proj_proj(proj) == pos) {
104 reg = arch_get_irn_register(proj);
110 assert(reg && "no out register found");
114 /*************************************************************
116 * (_) | | / _| | | | |
117 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
118 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
119 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
120 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
123 *************************************************************/
125 void sparc_emit_immediate(const ir_node *node)
127 // TODO: make sure it's a valid simm13 ?
128 const sparc_attr_t *attr = get_sparc_attr_const(node);
129 be_emit_irprintf("%d", attr->immediate_value);
132 void sparc_emit_source_register(const ir_node *node, int pos)
134 const arch_register_t *reg = get_in_reg(node, pos);
136 be_emit_string(arch_register_get_name(reg));
139 void sparc_emit_dest_register(const ir_node *node, int pos)
141 const arch_register_t *reg = get_out_reg(node, pos);
143 be_emit_string(arch_register_get_name(reg));
147 * Emits either a imm or register depending on arity of node
149 * @param register no (-1 if no register)
151 void sparc_emit_reg_or_imm(const ir_node *node, int pos)
153 if (get_irn_arity(node) > pos) {
155 sparc_emit_source_register(node, pos);
157 // we have a imm input
158 sparc_emit_immediate(node);
162 void sparc_emit_offset(const ir_node *node)
168 * Emit load mode char
170 void sparc_emit_load_mode(const ir_node *node)
172 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
173 ir_mode *mode = attr->load_store_mode;
174 int bits = get_mode_size_bits(mode);
175 bool is_signed = mode_is_signed(mode);
178 be_emit_string(is_signed ? "sh" : "uh");
179 } else if (bits == 8) {
180 be_emit_string(is_signed ? "sb" : "ub");
181 } else if (bits == 64) {
189 * Emit store mode char
191 void sparc_emit_store_mode(const ir_node *node)
193 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
194 ir_mode *mode = attr->load_store_mode;
195 int bits = get_mode_size_bits(mode);
199 } else if (bits == 8) {
201 } else if (bits == 64) {
209 * Returns the target label for a control flow node.
211 static void sparc_emit_cfop_target(const ir_node *node)
213 ir_node *block = get_irn_link(node);
214 be_emit_irprintf("BLOCK_%ld", get_irn_node_nr(block));
220 static void sparc_emit_entity(ir_entity *entity)
222 set_entity_backend_marked(entity, 1);
223 be_emit_ident(get_entity_ld_ident(entity));
226 /***********************************************************************************
229 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
230 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
231 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
232 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
234 ***********************************************************************************/
237 * Emits code for a unconditional jump.
239 static void emit_Jmp(const ir_node *node)
243 /* for now, the code works for scheduled and non-schedules blocks */
244 block = get_nodes_block(node);
246 be_emit_cstring("\tjmp ");
247 sparc_emit_cfop_target(node);
248 be_emit_finish_line_gas(node);
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);
260 /* SPARC stack grows downwards */
262 be_emit_cstring("\tadd ");
265 be_emit_cstring("\tsub ");
268 sparc_emit_source_register(irn, 0);
269 be_emit_irprintf(", %d", offs);
270 be_emit_cstring(", ");
271 sparc_emit_dest_register(irn, 0);
274 //be_emit_cstring("\t/* IncSP(0) skipped */");
275 be_emit_cstring("\t/* ");
276 be_emit_cstring("sub ");
278 sparc_emit_source_register(irn, 0);
279 be_emit_irprintf(", %d", offs);
280 be_emit_cstring(", ");
281 sparc_emit_dest_register(irn, 0);
282 be_emit_cstring(" ignored */ ");
285 be_emit_finish_line_gas(irn);
289 * Emits code for return node
291 static void emit_be_Return(const ir_node *irn)
293 be_emit_cstring("\tret");
294 be_emit_finish_line_gas(irn);
298 * Emits code for Call node
300 static void emit_be_Call(const ir_node *irn)
302 ir_entity *entity = be_Call_get_entity(irn);
304 if (entity != NULL) {
305 be_emit_cstring("\tcall ");
306 sparc_emit_entity(entity);
307 be_emit_finish_line_gas(irn);
308 be_emit_cstring("\tnop\t /* TODO: use delay slot */\n ");
310 be_emit_cstring("\tnop\t /* TODO: Entity == NULL */\n ");
312 be_emit_cstring("\tmov lr, pc");
313 be_emit_finish_line_gas(irn);
314 be_emit_cstring("\tmov pc, ");
315 sparc_emit_source_register(irn, be_pos_Call_ptr);
317 be_emit_finish_line_gas(irn);
321 /** An entry in the sym_or_tv set. */
322 typedef struct sym_or_tv_t {
324 ident *id; /**< An ident. */
325 tarval *tv; /**< A tarval. */
326 const void *generic; /**< For generic compare. */
328 unsigned label; /**< the associated label. */
329 char is_ident; /**< Non-zero if an ident is stored. */
333 * Returns a unique label. This number will not be used a second time.
335 static unsigned get_unique_label(void) {
336 static unsigned id = 0;
343 static void emit_sparc_SymConst(const ir_node *irn)
345 const sparc_symconst_attr_t *attr = get_sparc_symconst_attr_const(irn);
346 sym_or_tv_t key, *entry;
349 set_entity_backend_marked(attr->entity, 1);
351 key.u.id = get_entity_ld_ident(attr->entity);
354 entry = (sym_or_tv_t *)set_insert(sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
355 if (entry->label == 0) {
356 /* allocate a label */
357 entry->label = get_unique_label();
360 label = entry->label;
362 /* load the symbol indirect */
363 be_emit_cstring("\tld ");
364 be_emit_irprintf(".L%u, ", label);
365 sparc_emit_dest_register(irn, 0);
366 be_emit_finish_line_gas(irn);
371 * Emits code for FrameAddr fix
373 static void emit_sparc_FrameAddr(const ir_node *irn)
375 const sparc_symconst_attr_t *attr = get_irn_generic_attr_const(irn);
376 be_emit_cstring("\tadd ");
377 sparc_emit_source_register(irn, 0);
378 be_emit_cstring(", ");
379 sparc_emit_dest_register(irn, 0);
380 be_emit_cstring(", ");
381 be_emit_irprintf("#0x%X", attr->fp_offset);
382 be_emit_finish_line_gas(irn);
387 * Emits code for Branch
389 static void emit_sparc_Branch(const ir_node *irn)
395 * dummy emitter for ignored nodes
397 static void emit_nothing(const ir_node *irn)
405 * type of emitter function
407 typedef void (*emit_func) (const ir_node *);
410 * Set a node emitter. Make it a bit more type safe.
412 static inline void set_emitter(ir_op *op, emit_func sparc_emit_node)
414 op->ops.generic = (op_func)sparc_emit_node;
418 * Enters the emitter functions for handled nodes into the generic
419 * pointer of an opcode.
421 static void sparc_register_emitters(void)
424 /* first clear the generic function pointer for all ops */
425 clear_irp_opcodes_generic_func();
427 /* register all emitter functions defined in spec */
428 sparc_register_spec_emitters();
431 set_emitter(op_be_IncSP, emit_be_IncSP);
432 set_emitter(op_be_Return, emit_be_Return);
433 set_emitter(op_be_Call, emit_be_Call);
434 set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
435 set_emitter(op_sparc_Branch, emit_sparc_Branch);
436 set_emitter(op_sparc_SymConst, emit_sparc_SymConst);
439 set_emitter(op_arm_B, emit_arm_B);
440 set_emitter(op_arm_CopyB, emit_arm_CopyB);
441 set_emitter(op_arm_fpaConst, emit_arm_fpaConst);
442 set_emitter(op_arm_fpaDbl2GP, emit_arm_fpaDbl2GP);
443 set_emitter(op_arm_Jmp, emit_arm_Jmp);
444 set_emitter(op_arm_LdTls, emit_arm_LdTls);
445 set_emitter(op_arm_SwitchJmp, emit_arm_SwitchJmp);
446 set_emitter(op_be_Copy, emit_be_Copy);
447 set_emitter(op_be_CopyKeep, emit_be_Copy);
448 set_emitter(op_be_MemPerm, emit_be_MemPerm);
449 set_emitter(op_be_Perm, emit_be_Perm);
451 /* no need to emit anything for the following nodes */
452 set_emitter(op_Phi, emit_nothing);
453 set_emitter(op_be_Keep, emit_nothing);
454 set_emitter(op_be_Start, emit_nothing);
455 set_emitter(op_be_Barrier, emit_nothing);
460 * Emits code for a node.
462 void sparc_emit_node(const ir_node *node)
464 ir_op *op = get_irn_op(node);
466 if (op->ops.generic) {
467 emit_func func = (emit_func) op->ops.generic;
468 be_dbg_set_dbg_info(get_irn_dbg_info(node));
471 panic("Error: No emit handler for node %+F (graph %+F)\n",
472 node, current_ir_graph);
477 * Walks over the nodes in a block connected by scheduling edges
478 * and emits code for each node.
480 void sparc_gen_block(ir_node *block, void *data) {
484 if (! is_Block(block))
487 be_emit_cstring("BLOCK_");
488 be_emit_irprintf("%ld:\n", get_irn_node_nr(block));
489 be_emit_write_line();
491 sched_foreach(block, node) {
492 sparc_emit_node(node);
498 * Emits code for function start.
500 void sparc_emit_func_prolog(ir_graph *irg) {
501 ir_entity *ent = get_irg_entity(irg);
502 const char *irg_name = get_entity_ld_name(ent);
504 /* TODO: emit function header */
505 be_emit_cstring("# -- Begin ");
506 be_emit_string(irg_name);
507 be_emit_cstring("\n");
510 be_emit_write_line();
511 be_gas_emit_switch_section(GAS_SECTION_TEXT);
512 be_emit_cstring("\t.align 4\n");
514 if (get_entity_visibility(ent) == visibility_external_visible)
515 be_emit_irprintf("\t.global %s\n", irg_name);
517 be_emit_cstring("\t/* .proc n - n specifies which registers will contain the return value upon return from the procedure */\n");
518 be_emit_irprintf("\t.type %s, #function\n", irg_name);
520 be_emit_irprintf("%s:\n", irg_name);
521 // TODO: fetch reg names via API func
522 // TODO: move value to SPARC_MIN_STACKSIZE const
523 be_emit_cstring("\tsave %r14, -64, %r14");
524 be_emit_cstring("\t/* incr CWP and alloc min. required stack space */\n");
525 be_emit_write_line();
529 * Emits code for function end
531 void sparc_emit_func_epilog(ir_graph *irg) {
532 ir_entity *ent = get_irg_entity(irg);
533 const char *irg_name = get_entity_ld_name(ent);
535 be_emit_cstring("\trestore");
536 be_emit_cstring("\t/* decr CWP */\n");
537 be_emit_irprintf("\t.size %s, .-%s\n", irg_name, irg_name);
538 be_emit_cstring("# -- End ");
539 be_emit_string(irg_name);
540 be_emit_cstring("\n");
541 be_emit_write_line();
545 * Sets labels for control flow nodes (jump target)
546 * TODO: Jump optimization
548 void sparc_gen_labels(ir_node *block, void *env) {
550 int n = get_Block_n_cfgpreds(block);
553 for (n--; n >= 0; n--) {
554 pred = get_Block_cfgpred(block, n);
555 set_irn_link(pred, block);
560 * Compare two entries of the symbol or tarval set.
562 static int cmp_sym_or_tv(const void *elt, const void *key, size_t size) {
563 const sym_or_tv_t *p1 = elt;
564 const sym_or_tv_t *p2 = key;
567 /* as an identifier NEVER can point to a tarval, it's enough
568 to compare it this way */
569 return p1->u.generic != p2->u.generic;
572 void gen_symconst_values()
574 sym_or_tv = new_set(cmp_sym_or_tv, 8);
576 /* emit SymConst values */
577 if (set_count(sym_or_tv) > 0) {
580 be_emit_cstring("\t.align 2\n");
582 foreach_set(sym_or_tv, entry) {
583 be_emit_irprintf(".L%u:\n", entry->label);
585 if (entry->is_ident) {
586 be_emit_cstring("\t.word\t");
587 be_emit_ident(entry->u.id);
589 be_emit_write_line();
591 tarval *tv = entry->u.tv;
592 int i, size = get_mode_size_bytes(get_tarval_mode(tv));
595 /* TODO: beware: ARM fpa uses big endian format */
596 for (i = ((size + 3) & ~3) - 4; i >= 0; i -= 4) {
598 v = get_tarval_sub_bits(tv, i+3);
599 v = (v << 8) | get_tarval_sub_bits(tv, i+2);
600 v = (v << 8) | get_tarval_sub_bits(tv, i+1);
601 v = (v << 8) | get_tarval_sub_bits(tv, i+0);
602 be_emit_irprintf("\t.word\t%u\n", v);
603 be_emit_write_line();
608 be_emit_write_line();
616 void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
618 ir_entity *entity = get_irg_entity(irg);
620 /* register all emitter functions */
621 sparc_register_emitters();
622 be_dbg_method_begin(entity, be_abi_get_stack_layout(cg->birg->abi));
623 sparc_emit_func_prolog(irg);
624 irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);
625 irg_walk_blkwise_graph(irg, NULL, sparc_gen_block, NULL);
626 sparc_emit_func_epilog(irg);
628 gen_symconst_values();
631 void sparc_init_emitter(void)
633 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.emit");