17 #include "../besched.h"
18 #include "../benode_t.h"
20 #include "ia32_emitter.h"
21 #include "gen_ia32_emitter.h"
22 #include "ia32_nodes_attr.h"
23 #include "ia32_new_nodes.h"
24 #include "ia32_map_regs.h"
26 #ifdef obstack_chunk_alloc
27 # undef obstack_chunk_alloc
28 # define obstack_chunk_alloc xmalloc
30 # define obstack_chunk_alloc xmalloc
31 # define obstack_chunk_free free
34 extern int obstack_printf(struct obstack *obst, char *fmt, ...);
36 #define SNPRINTF_BUF_LEN 128
38 static const arch_env_t *arch_env = NULL;
41 * Emits registers and/or address mode of a binary operation.
43 char *ia32_emit_binop(const ir_node *n) {
44 static char *buf = NULL;
46 /* verify that this function is never called on non-AM supporting operations */
47 assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
50 buf = xcalloc(1, SNPRINTF_BUF_LEN);
53 memset(buf, 0, SNPRINTF_BUF_LEN);
56 switch(get_ia32_op_type(n)) {
58 if (get_ia32_cnst(n)) {
59 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
62 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S,%4S", n, n);
66 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n));
69 if (get_ia32_cnst(n)) {
70 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n), get_ia32_cnst(n));
73 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %3S", ia32_emit_am(n), n);
77 assert(0 && "unsupported op type");
84 * Emits registers and/or address mode of a unary operation.
86 char *ia32_emit_unop(const ir_node *n) {
87 static char *buf = NULL;
90 buf = xcalloc(1, SNPRINTF_BUF_LEN);
93 memset(buf, 0, SNPRINTF_BUF_LEN);
96 switch(get_ia32_op_type(n)) {
98 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
101 snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n));
104 assert(0 && "unsupported op type");
113 char *ia32_emit_am(const ir_node *n) {
114 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
118 static struct obstack *obst = NULL;
119 ir_mode *mode = get_ia32_ls_mode(n);
121 if (! is_ia32_Lea(n))
122 assert(mode && "AM node must have ls_mode attribute set.");
125 obst = xcalloc(1, sizeof(*obst));
128 obstack_free(obst, NULL);
131 /* obstack_free with NULL results in an uninitialized obstack */
135 switch (get_mode_size_bits(mode)) {
137 obstack_printf(obst, "BYTE PTR ");
140 obstack_printf(obst, "WORD PTR ");
147 obstack_printf(obst, "[");
149 if (am_flav & ia32_B) {
150 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
154 if (am_flav & ia32_I) {
156 obstack_printf(obst, "+");
159 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
161 if (am_flav & ia32_S) {
162 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
168 if (am_flav & ia32_O) {
169 obstack_printf(obst, get_ia32_am_offs(n));
172 obstack_printf(obst, "] ");
174 size = obstack_object_size(obst);
175 s = obstack_finish(obst);
181 /*************************************************************
183 * (_) | | / _| | | | |
184 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
185 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
186 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
187 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
190 *************************************************************/
192 /* We always pass the ir_node which is a pointer. */
193 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
194 return lc_arg_type_ptr;
199 * Returns the register at in position pos.
201 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
203 const arch_register_t *reg = NULL;
205 assert(get_irn_arity(irn) > pos && "Invalid IN position");
207 /* The out register of the operator at position pos is the
208 in register we need. */
209 op = get_irn_n(irn, pos);
211 reg = arch_get_irn_register(arch_env, op);
213 assert(reg && "no in register found");
218 * Returns the register at out position pos.
220 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
222 const arch_register_t *reg = NULL;
224 /* 1st case: irn is not of mode_T, so it has only */
225 /* one OUT register -> good */
226 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
227 /* Proj with the corresponding projnum for the register */
229 if (get_irn_mode(irn) != mode_T) {
230 reg = arch_get_irn_register(arch_env, irn);
232 else if (is_ia32_irn(irn)) {
233 reg = get_ia32_out_reg(irn, pos);
236 const ir_edge_t *edge;
238 foreach_out_edge(irn, edge) {
239 proj = get_edge_src_irn(edge);
240 assert(is_Proj(proj) && "non-Proj from mode_T node");
241 if (get_Proj_proj(proj) == pos) {
242 reg = arch_get_irn_register(arch_env, proj);
248 assert(reg && "no out register found");
258 * Returns the name of the in register at position pos.
260 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
261 const arch_register_t *reg;
263 if (in_out == IN_REG) {
264 reg = get_in_reg(irn, pos);
267 /* destination address mode nodes don't have outputs */
268 if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
272 reg = get_out_reg(irn, pos);
275 return arch_register_get_name(reg);
279 * Get the register name for a node.
281 static int ia32_get_reg_name(lc_appendable_t *app,
282 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
285 ir_node *X = arg->v_ptr;
286 int nr = occ->width - 1;
289 return lc_arg_append(app, occ, "(null)", 6);
291 buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
293 return lc_arg_append(app, occ, buf, strlen(buf));
297 * Returns the tarval, offset or scale of an ia32 as a string.
299 static int ia32_const_to_str(lc_appendable_t *app,
300 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
303 ir_node *X = arg->v_ptr;
306 return lc_arg_append(app, occ, "(null)", 6);
308 if (occ->conversion == 'C') {
309 buf = get_ia32_cnst(X);
312 buf = get_ia32_am_offs(X);
315 return buf ? lc_arg_append(app, occ, buf, strlen(buf)) : 0;
319 * Determines the SSE suffix depending on the mode.
321 static int ia32_get_mode_suffix(lc_appendable_t *app,
322 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
324 ir_node *X = arg->v_ptr;
325 ir_mode *mode = is_ia32_Lea(X) ? get_irn_mode(X) : get_ia32_ls_mode(X);
328 return lc_arg_append(app, occ, "(null)", 6);
330 if (mode_is_float(mode)) {
331 return lc_appendable_chadd(app, get_mode_size_bits(mode) == 32 ? 's' : 'd');
335 return lc_appendable_chadd(app, mode_is_signed(mode) ? 's' : 'z');
340 * Return the ia32 printf arg environment.
341 * We use the firm environment with some additional handlers.
343 const lc_arg_env_t *ia32_get_arg_env(void) {
344 static lc_arg_env_t *env = NULL;
346 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
347 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
348 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
351 /* extend the firm printer */
352 env = firm_get_arg_env();
354 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
355 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
356 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
357 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
358 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
366 * Add a number to a prefix. This number will not be used a second time.
368 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
369 static unsigned long id = 0;
370 snprintf(buf, buflen, "%s%lu", prefix, ++id);
375 /*************************************************
378 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
379 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
380 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
381 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
383 *************************************************/
386 * coding of conditions
388 struct cmp2conditon_t {
394 * positive conditions for signed compares
396 static const struct cmp2conditon_t cmp2condition_s[] = {
397 { NULL, pn_Cmp_False }, /* always false */
398 { "e", pn_Cmp_Eq }, /* == */
399 { "l", pn_Cmp_Lt }, /* < */
400 { "le", pn_Cmp_Le }, /* <= */
401 { "g", pn_Cmp_Gt }, /* > */
402 { "ge", pn_Cmp_Ge }, /* >= */
403 { "ne", pn_Cmp_Lg }, /* != */
404 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
405 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
406 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
407 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
408 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
409 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
410 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
411 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
412 { NULL, pn_Cmp_True }, /* always true */
416 * positive conditions for unsigned compares
418 static const struct cmp2conditon_t cmp2condition_u[] = {
419 { NULL, pn_Cmp_False }, /* always false */
420 { "e", pn_Cmp_Eq }, /* == */
421 { "b", pn_Cmp_Lt }, /* < */
422 { "be", pn_Cmp_Le }, /* <= */
423 { "a", pn_Cmp_Gt }, /* > */
424 { "ae", pn_Cmp_Ge }, /* >= */
425 { "ne", pn_Cmp_Lg }, /* != */
426 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
427 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
428 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
429 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
430 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
431 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
432 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
433 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
434 { NULL, pn_Cmp_True }, /* always true */
438 * returns the condition code
440 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
442 assert(cmp2condition_s[cmp_code].num == cmp_code);
443 assert(cmp2condition_u[cmp_code].num == cmp_code);
445 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
449 * Returns the target label for a control flow node.
451 static char *get_cfop_target(const ir_node *irn, char *buf) {
452 ir_node *bl = get_irn_link(irn);
454 snprintf(buf, SNPRINTF_BUF_LEN, "BLOCK_%ld", get_irn_node_nr(bl));
459 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
461 static void finish_CondJmp(FILE *F, const ir_node *irn) {
463 const ir_edge_t *edge;
464 char buf[SNPRINTF_BUF_LEN];
466 edge = get_irn_out_edge_first(irn);
467 proj = get_edge_src_irn(edge);
468 assert(is_Proj(proj) && "CondJmp with a non-Proj");
470 if (get_Proj_proj(proj) == 1) {
471 fprintf(F, "\tj%s %s\t\t\t/* cmp(a, b) == TRUE */\n",
472 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
473 get_cfop_target(proj, buf));
476 fprintf(F, "\tjn%s %s\t\t\t/* cmp(a, b) == FALSE */\n",
477 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
478 get_cfop_target(proj, buf));
481 edge = get_irn_out_edge_next(irn, edge);
483 proj = get_edge_src_irn(edge);
484 assert(is_Proj(proj) && "CondJmp with a non-Proj");
485 fprintf(F, "\tjmp %s\t\t\t/* otherwise */\n", get_cfop_target(proj, buf));
490 * Emits code for conditional jump with two variables.
492 static void emit_ia32_CondJmp(const ir_node *irn, emit_env_t *env) {
495 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp(%+F, %+F) */\n",
496 ia32_emit_binop(irn), get_irn_n(irn, 0), get_irn_n(irn, 1));
497 finish_CondJmp(F, irn);
501 * Emits code for conditional jump with immediate.
503 void emit_ia32_CondJmp_i(const ir_node *irn, emit_env_t *env) {
506 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp_i(%+F) */\n",
507 ia32_emit_binop(irn), get_irn_n(irn, 0));
508 finish_CondJmp(F, irn);
513 /*********************************************************
516 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
517 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
518 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
519 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
522 *********************************************************/
524 /* jump table entry (target and corresponding number) */
525 typedef struct _branch_t {
530 /* jump table for switch generation */
531 typedef struct _jmp_tbl_t {
532 ir_node *defProj; /**< default target */
533 int min_value; /**< smallest switch case */
534 int max_value; /**< largest switch case */
535 int num_branches; /**< number of jumps */
536 char *label; /**< label of the jump table */
537 branch_t *branches; /**< jump array */
541 * Compare two variables of type branch_t. Used to sort all switch cases
543 static int ia32_cmp_branch_t(const void *a, const void *b) {
544 branch_t *b1 = (branch_t *)a;
545 branch_t *b2 = (branch_t *)b;
547 if (b1->value <= b2->value)
554 * Emits code for a SwitchJmp (creates a jump table if
555 * possible otherwise a cmp-jmp cascade). Port from
558 void emit_ia32_SwitchJmp(const ir_node *irn, emit_env_t *emit_env) {
559 unsigned long interval;
560 char buf[SNPRINTF_BUF_LEN];
561 int last_value, i, pn, do_jmp_tbl = 1;
564 const ir_edge_t *edge;
565 const lc_arg_env_t *env = ia32_get_arg_env();
566 FILE *F = emit_env->out;
568 /* fill the table structure */
569 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
570 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
572 tbl.num_branches = get_irn_n_edges(irn);
573 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
574 tbl.min_value = INT_MAX;
575 tbl.max_value = INT_MIN;
578 /* go over all proj's and collect them */
579 foreach_out_edge(irn, edge) {
580 proj = get_edge_src_irn(edge);
581 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
583 pn = get_Proj_proj(proj);
585 /* create branch entry */
586 tbl.branches[i].target = proj;
587 tbl.branches[i].value = pn;
589 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
590 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
592 /* check for default proj */
593 if (pn == get_ia32_pncode(irn)) {
594 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
601 /* sort the branches by their number */
602 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
604 /* two-complement's magic make this work without overflow */
605 interval = tbl.max_value - tbl.min_value;
607 /* check value interval */
608 if (interval > 16 * 1024) {
612 /* check ratio of value interval to number of branches */
613 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
619 if (tbl.min_value != 0) {
620 lc_efprintf(env, F, "\tcmpl %lu, -%d(%1S)\t\t/* first switch value is not 0 */\n",
621 interval, tbl.min_value, irn);
624 lc_efprintf(env, F, "\tcmpl %lu, %1S\t\t\t/* compare for switch */\n", interval, irn);
627 fprintf(F, "\tja %s\t\t\t/* default jump if out of range */\n", get_cfop_target(tbl.defProj, buf));
629 if (tbl.num_branches > 1) {
632 lc_efprintf(env, F, "\tjmp [%1S*4+%s]\t\t/* get jump table entry as target */\n", irn, tbl.label);
634 fprintf(F, "\t.section\t.rodata\t\t/* start jump table */\n");
635 fprintf(F, "\t.align 4\n");
637 fprintf(F, "%s:\n", tbl.label);
638 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[0].target, buf), tbl.branches[0].value);
640 last_value = tbl.branches[0].value;
641 for (i = 1; i < tbl.num_branches; ++i) {
642 while (++last_value < tbl.branches[i].value) {
643 fprintf(F, "\t.long %s\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
645 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[i].target, buf), last_value);
648 fprintf(F, "\t.text\t\t\t\t/* end of jump table */\n");
651 /* one jump is enough */
652 fprintf(F, "\tjmp %s\t\t/* only one case given */\n", get_cfop_target(tbl.branches[0].target, buf));
655 else { // no jump table
656 for (i = 0; i < tbl.num_branches; ++i) {
657 lc_efprintf(env, F, "\tcmpl %d, %1S\t\t\t/* case %d */\n", tbl.branches[i].value, irn, i);
658 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
661 fprintf(F, "\tjmp %s\t\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
671 * Emits code for a unconditional jump.
673 void emit_Jmp(const ir_node *irn, emit_env_t *env) {
676 char buf[SNPRINTF_BUF_LEN];
677 ir_fprintf(F, "\tjmp %s\t\t\t/* Jmp(%+F) */\n", get_cfop_target(irn, buf), get_irn_link(irn));
682 /****************************
685 * _ __ _ __ ___ _ ___
686 * | '_ \| '__/ _ \| |/ __|
687 * | |_) | | | (_) | |\__ \
688 * | .__/|_| \___/| ||___/
691 ****************************/
694 * Emits code for a proj -> node
696 void emit_Proj(const ir_node *irn, emit_env_t *env) {
697 ir_node *pred = get_Proj_pred(irn);
699 if (get_irn_op(pred) == op_Start) {
700 switch(get_Proj_proj(irn)) {
701 case pn_Start_X_initial_exec:
710 /**********************************
713 * | | ___ _ __ _ _| |_) |
714 * | | / _ \| '_ \| | | | _ <
715 * | |___| (_) | |_) | |_| | |_) |
716 * \_____\___/| .__/ \__, |____/
719 **********************************/
721 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
722 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
723 fprintf(F, "\tcld\t\t\t\t/* copy direction forward*/\n");
727 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 1 */\n");
730 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 2 */\n");
733 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 3 */\n");
734 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 3 */\n");
739 void emit_ia32_CopyB(const ir_node *irn, emit_env_t *emit_env) {
740 FILE *F = emit_env->out;
741 tarval *tv = get_ia32_Immop_tarval(irn);
742 int rem = get_tarval_long(tv);
743 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
745 emit_CopyB_prolog(F, rem, size);
747 fprintf(F, "\trep movsd\t\t\t\t/* memcopy */\n");
750 void emit_ia32_CopyB_i(const ir_node *irn, emit_env_t *emit_env) {
751 tarval *tv = get_ia32_Immop_tarval(irn);
752 int size = get_tarval_long(tv);
753 FILE *F = emit_env->out;
755 emit_CopyB_prolog(F, size & 0x3, size);
759 fprintf(F, "\tmovsd\t\t\t\t/* memcopy unrolled */\n");
765 /*******************************************
768 * | |__ ___ _ __ ___ __| | ___ ___
769 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
770 * | |_) | __/ | | | (_) | (_| | __/\__ \
771 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
773 *******************************************/
775 void emit_be_Call(const ir_node *irn, emit_env_t *emit_env) {
776 FILE *F = emit_env->out;
777 entity *ent = be_Call_get_entity(irn);
779 fprintf(F, "\tcall ");
782 fprintf(F, "%s", get_entity_name(ent));
785 lc_efprintf(ia32_get_arg_env(), F, "%1D", get_irn_n(irn, be_pos_Call_ptr));
788 ir_fprintf(F, "\t\t\t/* %+F (be_Call) */\n", irn);
791 void emit_be_IncSP(const ir_node *irn, emit_env_t *emit_env) {
792 FILE *F = emit_env->out;
793 unsigned offs = be_get_IncSP_offset(irn);
794 be_stack_dir_t dir = be_get_IncSP_direction(irn);
797 lc_efprintf(ia32_get_arg_env(), F, "\tadd %1S,%s%u\t\t\t/* %+F (IncSP) */\n", irn,
798 (dir == be_stack_dir_along) ? " -" : " ", offs, irn);
801 fprintf(F, "\t\t\t\t\t/* omitted IncSP with 0 */\n");
805 void emit_be_SetSP(const ir_node *irn, emit_env_t *emit_env) {
806 FILE *F = emit_env->out;
808 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D, %3S\t\t\t/* restore SP */\n", irn, irn);
811 void emit_be_Copy(const ir_node *irn, emit_env_t *emit_env) {
812 FILE *F = emit_env->out;
814 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D, %1S\t\t\t/* %+F */\n", irn, irn, irn);
817 void emit_be_Perm(const ir_node *irn, emit_env_t *emit_env) {
818 FILE *F = emit_env->out;
820 lc_efprintf(ia32_get_arg_env(), F, "\txchg %1S, %2S\t\t\t/* %+F(%1A, %2A) */\n", irn, irn, irn);
823 /***********************************************************************************
826 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
827 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
828 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
829 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
831 ***********************************************************************************/
834 * Enters the emitter functions for handled nodes into the generic
835 * pointer of an opcode.
837 static void ia32_register_emitters(void) {
839 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
840 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
841 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
843 /* first clear the generic function pointer for all ops */
844 clear_irp_opcodes_generic_func();
846 /* register all emitter functions defined in spec */
847 ia32_register_spec_emitters();
849 /* other ia32 emitter functions */
851 IA32_EMIT(SwitchJmp);
872 * Emits code for a node.
874 static void ia32_emit_node(const ir_node *irn, void *env) {
875 emit_env_t *emit_env = env;
876 firm_dbg_module_t *mod = emit_env->mod;
877 FILE *F = emit_env->out;
878 ir_op *op = get_irn_op(irn);
880 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
882 if (op->ops.generic) {
883 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
887 ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
892 * Walks over the nodes in a block connected by scheduling edges
893 * and emits code for each node.
895 static void ia32_gen_block(ir_node *block, void *env) {
898 if (! is_Block(block))
901 fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
902 sched_foreach(block, irn) {
903 ia32_emit_node(irn, env);
909 * Emits code for function start.
911 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
912 const char *irg_name = get_entity_name(get_irg_entity(irg));
914 fprintf(F, "\t.text\n");
915 fprintf(F, ".globl %s\n", irg_name);
916 fprintf(F, "\t.type\t%s, @function\n", irg_name);
917 fprintf(F, "%s:\n", irg_name);
921 * Emits code for function end
923 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
924 const char *irg_name = get_entity_name(get_irg_entity(irg));
926 fprintf(F, "\tret\n");
927 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
931 * Sets labels for control flow nodes (jump target)
932 * TODO: Jump optimization
934 static void ia32_gen_labels(ir_node *block, void *env) {
936 int n = get_Block_n_cfgpreds(block);
938 for (n--; n >= 0; n--) {
939 pred = get_Block_cfgpred(block, n);
940 set_irn_link(pred, block);
945 * Main driver. Emits the code for one routine.
947 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
950 emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
952 emit_env.arch_env = cg->arch_env;
955 /* set the global arch_env (needed by print hooks) */
956 arch_env = cg->arch_env;
958 ia32_register_emitters();
960 ia32_emit_func_prolog(F, irg);
961 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
962 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
963 ia32_emit_func_epilog(F, irg);