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;
47 buf = xcalloc(1, SNPRINTF_BUF_LEN);
50 memset(buf, 0, SNPRINTF_BUF_LEN);
53 switch(get_ia32_op_type(n)) {
55 if (get_ia32_cnst(n)) {
56 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %s", n, get_ia32_cnst(n));
59 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %4S", n, n);
63 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %s", n, ia32_emit_am(n));
66 if (get_ia32_cnst(n)) {
67 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n), get_ia32_cnst(n));
71 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %3S", ia32_emit_am(n), n);
74 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %4S", ia32_emit_am(n), n);
79 assert(0 && "unsupported op type");
86 * Emits registers and/or address mode of a unary operation.
88 char *ia32_emit_unop(const ir_node *n) {
89 static char *buf = NULL;
92 buf = xcalloc(1, SNPRINTF_BUF_LEN);
95 memset(buf, 0, SNPRINTF_BUF_LEN);
98 switch(get_ia32_op_type(n)) {
100 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
103 snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n));
106 assert(0 && "unsupported op type");
115 char *ia32_emit_am(const ir_node *n) {
116 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
120 static struct obstack *obst = NULL;
123 obst = xcalloc(1, sizeof(*obst));
126 obstack_free(obst, NULL);
129 /* obstack_free with NULL results in an uninitialized obstack */
132 obstack_printf(obst, "[");
134 if (am_flav & ia32_B) {
135 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
139 if (am_flav & ia32_I) {
141 obstack_printf(obst, "+");
144 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
146 if (am_flav & ia32_S) {
147 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
153 if (am_flav & ia32_O) {
154 obstack_printf(obst, get_ia32_am_offs(n));
157 obstack_printf(obst, "] ");
159 size = obstack_object_size(obst);
160 s = obstack_finish(obst);
166 /*************************************************************
168 * (_) | | / _| | | | |
169 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
170 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
171 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
172 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
175 *************************************************************/
177 /* We always pass the ir_node which is a pointer. */
178 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
179 return lc_arg_type_ptr;
184 * Returns the register at in position pos.
186 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
188 const arch_register_t *reg = NULL;
190 assert(get_irn_arity(irn) > pos && "Invalid IN position");
192 /* The out register of the operator at position pos is the
193 in register we need. */
194 op = get_irn_n(irn, pos);
196 reg = arch_get_irn_register(arch_env, op);
198 assert(reg && "no in register found");
203 * Returns the register at out position pos.
205 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
207 const arch_register_t *reg = NULL;
209 assert(get_irn_n_edges(irn) > pos && "Invalid OUT position");
211 /* 1st case: irn is not of mode_T, so it has only */
212 /* one OUT register -> good */
213 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
214 /* Proj with the corresponding projnum for the register */
216 if (get_irn_mode(irn) != mode_T) {
217 reg = arch_get_irn_register(arch_env, irn);
219 else if (is_ia32_irn(irn)) {
220 reg = get_ia32_out_reg(irn, pos);
223 const ir_edge_t *edge;
225 foreach_out_edge(irn, edge) {
226 proj = get_edge_src_irn(edge);
227 assert(is_Proj(proj) && "non-Proj from mode_T node");
228 if (get_Proj_proj(proj) == pos) {
229 reg = arch_get_irn_register(arch_env, proj);
235 assert(reg && "no out register found");
240 * Returns the number of the in register at position pos.
242 int get_ia32_reg_nr(ir_node *irn, int pos, int in_out) {
243 const arch_register_t *reg;
246 reg = get_in_reg(irn, pos);
249 reg = get_out_reg(irn, pos);
252 return arch_register_get_index(reg);
261 * Returns the name of the in register at position pos.
263 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
264 const arch_register_t *reg;
266 if (in_out == IN_REG) {
267 reg = get_in_reg(irn, pos);
270 /* destination address mode nodes don't have outputs */
271 if (get_ia32_op_type(irn) == ia32_AddrModeD) {
275 reg = get_out_reg(irn, pos);
278 return arch_register_get_name(reg);
282 * Get the register name for a node.
284 static int ia32_get_reg_name(lc_appendable_t *app,
285 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
288 ir_node *X = arg->v_ptr;
289 int nr = occ->width - 1;
292 return lc_arg_append(app, occ, "(null)", 6);
294 buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
296 return lc_arg_append(app, occ, buf, strlen(buf));
300 * Returns the tarval, offset or scale of an ia32 as a string.
302 static int ia32_const_to_str(lc_appendable_t *app,
303 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
306 ir_node *X = arg->v_ptr;
309 return lc_arg_append(app, occ, "(null)", 6);
311 if (occ->conversion == 'C') {
312 buf = get_ia32_cnst(X);
315 buf = get_ia32_am_offs(X);
318 return buf ? lc_arg_append(app, occ, buf, strlen(buf)) : 0;
322 * Determines the SSE suffix depending on the mode.
324 static int ia32_get_mode_suffix(lc_appendable_t *app,
325 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
327 ir_node *X = arg->v_ptr;
330 return lc_arg_append(app, occ, "(null)", 6);
332 return lc_appendable_chadd(app, get_mode_size_bits(get_irn_mode(X)) == 32 ? 's' : 'd');
336 * Return the ia32 printf arg environment.
337 * We use the firm environment with some additional handlers.
339 const lc_arg_env_t *ia32_get_arg_env(void) {
340 static lc_arg_env_t *env = NULL;
342 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
343 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
344 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
347 /* extend the firm printer */
348 env = firm_get_arg_env();
350 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
351 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
352 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
353 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
354 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
362 * Add a number to a prefix. This number will not be used a second time.
364 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
365 static unsigned long id = 0;
366 snprintf(buf, buflen, "%s%lu", prefix, ++id);
371 /*************************************************
374 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
375 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
376 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
377 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
379 *************************************************/
382 * coding of conditions
384 struct cmp2conditon_t {
390 * positive conditions for signed compares
392 static const struct cmp2conditon_t cmp2condition_s[] = {
393 { NULL, pn_Cmp_False }, /* always false */
394 { "e", pn_Cmp_Eq }, /* == */
395 { "l", pn_Cmp_Lt }, /* < */
396 { "le", pn_Cmp_Le }, /* <= */
397 { "g", pn_Cmp_Gt }, /* > */
398 { "ge", pn_Cmp_Ge }, /* >= */
399 { "ne", pn_Cmp_Lg }, /* != */
400 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
401 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
402 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
403 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
404 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
405 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
406 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
407 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
408 { NULL, pn_Cmp_True }, /* always true */
412 * positive conditions for unsigned compares
414 static const struct cmp2conditon_t cmp2condition_u[] = {
415 { NULL, pn_Cmp_False }, /* always false */
416 { "e", pn_Cmp_Eq }, /* == */
417 { "b", pn_Cmp_Lt }, /* < */
418 { "be", pn_Cmp_Le }, /* <= */
419 { "a", pn_Cmp_Gt }, /* > */
420 { "ae", pn_Cmp_Ge }, /* >= */
421 { "ne", pn_Cmp_Lg }, /* != */
422 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
423 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
424 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
425 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
426 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
427 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
428 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
429 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
430 { NULL, pn_Cmp_True }, /* always true */
434 * returns the condition code
436 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
438 assert(cmp2condition_s[cmp_code].num == cmp_code);
439 assert(cmp2condition_u[cmp_code].num == cmp_code);
441 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
445 * Returns the target label for a control flow node.
447 static char *get_cfop_target(const ir_node *irn, char *buf) {
448 ir_node *bl = get_irn_link(irn);
450 snprintf(buf, SNPRINTF_BUF_LEN, "BLOCK_%ld", get_irn_node_nr(bl));
455 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
457 static void finish_CondJmp(FILE *F, const ir_node *irn) {
459 const ir_edge_t *edge;
460 char buf[SNPRINTF_BUF_LEN];
462 edge = get_irn_out_edge_first(irn);
463 proj = get_edge_src_irn(edge);
464 assert(is_Proj(proj) && "CondJmp with a non-Proj");
466 if (get_Proj_proj(proj) == 1) {
467 fprintf(F, "\tj%s %s\t\t\t/* cmp(a, b) == TRUE */\n",
468 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
469 get_cfop_target(proj, buf));
472 fprintf(F, "\tjn%s %s\t\t\t/* cmp(a, b) == FALSE */\n",
473 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
474 get_cfop_target(proj, buf));
477 edge = get_irn_out_edge_next(irn, edge);
479 proj = get_edge_src_irn(edge);
480 assert(is_Proj(proj) && "CondJmp with a non-Proj");
481 fprintf(F, "\tjmp %s\t\t\t/* otherwise */\n", get_cfop_target(proj, buf));
486 * Emits code for conditional jump with two variables.
488 static void emit_ia32_CondJmp(const ir_node *irn, emit_env_t *env) {
491 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %2S, %1S\t\t\t/* CondJmp(%+F, %+F) */\n", irn, irn,
492 get_irn_n(irn, 0), get_irn_n(irn, 1));
493 finish_CondJmp(F, irn);
497 * Emits code for conditional jump with immediate.
499 void emit_ia32_CondJmp_i(const ir_node *irn, emit_env_t *env) {
502 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %C, %1S\t\t\t/* CondJmp_i(%+F) */\n", irn, irn, get_irn_n(irn, 0));
503 finish_CondJmp(F, irn);
508 /*********************************************************
511 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
512 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
513 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
514 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
517 *********************************************************/
519 /* jump table entry (target and corresponding number) */
520 typedef struct _branch_t {
525 /* jump table for switch generation */
526 typedef struct _jmp_tbl_t {
527 ir_node *defProj; /**< default target */
528 int min_value; /**< smallest switch case */
529 int max_value; /**< largest switch case */
530 int num_branches; /**< number of jumps */
531 char *label; /**< label of the jump table */
532 branch_t *branches; /**< jump array */
536 * Compare two variables of type branch_t. Used to sort all switch cases
538 static int ia32_cmp_branch_t(const void *a, const void *b) {
539 branch_t *b1 = (branch_t *)a;
540 branch_t *b2 = (branch_t *)b;
542 if (b1->value <= b2->value)
549 * Emits code for a SwitchJmp (creates a jump table if
550 * possible otherwise a cmp-jmp cascade). Port from
553 void emit_ia32_SwitchJmp(const ir_node *irn, emit_env_t *emit_env) {
554 unsigned long interval;
555 char buf[SNPRINTF_BUF_LEN];
556 int last_value, i, pn, do_jmp_tbl = 1;
559 const ir_edge_t *edge;
560 const lc_arg_env_t *env = ia32_get_arg_env();
561 FILE *F = emit_env->out;
563 /* fill the table structure */
564 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
565 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
567 tbl.num_branches = get_irn_n_edges(irn);
568 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
569 tbl.min_value = INT_MAX;
570 tbl.max_value = INT_MIN;
573 /* go over all proj's and collect them */
574 foreach_out_edge(irn, edge) {
575 proj = get_edge_src_irn(edge);
576 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
578 pn = get_Proj_proj(proj);
580 /* create branch entry */
581 tbl.branches[i].target = proj;
582 tbl.branches[i].value = pn;
584 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
585 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
587 /* check for default proj */
588 if (pn == get_ia32_pncode(irn)) {
589 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
596 /* sort the branches by their number */
597 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
599 /* two-complement's magic make this work without overflow */
600 interval = tbl.max_value - tbl.min_value;
602 /* check value interval */
603 if (interval > 16 * 1024) {
607 /* check ratio of value interval to number of branches */
608 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
614 if (tbl.min_value != 0) {
615 lc_efprintf(env, F, "\tcmpl %lu, -%d(%1S)\t\t/* first switch value is not 0 */\n",
616 interval, tbl.min_value, irn);
619 lc_efprintf(env, F, "\tcmpl %lu, %1S\t\t\t/* compare for switch */\n", interval, irn);
622 fprintf(F, "\tja %s\t\t\t/* default jump if out of range */\n", get_cfop_target(tbl.defProj, buf));
624 if (tbl.num_branches > 1) {
627 lc_efprintf(env, F, "\tjmp *%s(,%1S,4)\t\t/* get jump table entry as target */\n", tbl.label, irn);
629 fprintf(F, "\t.section\t.rodata\t\t/* start jump table */\n");
630 fprintf(F, "\t.align 4\n");
632 fprintf(F, "%s:\n", tbl.label);
633 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[0].target, buf), tbl.branches[0].value);
635 last_value = tbl.branches[0].value;
636 for (i = 1; i < tbl.num_branches; ++i) {
637 while (++last_value < tbl.branches[i].value) {
638 fprintf(F, "\t.long %s\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
640 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[i].target, buf), last_value);
643 fprintf(F, "\t.text\t\t\t\t/* end of jump table */\n");
646 /* one jump is enough */
647 fprintf(F, "\tjmp %s\t\t/* only one case given */\n", get_cfop_target(tbl.branches[0].target, buf));
650 else { // no jump table
651 for (i = 0; i < tbl.num_branches; ++i) {
652 lc_efprintf(env, F, "\tcmpl %d, %1S\t\t\t/* case %d */\n", tbl.branches[i].value, irn, i);
653 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
656 fprintf(F, "\tjmp %s\t\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
666 * Emits code for a unconditional jump.
668 void emit_Jmp(const ir_node *irn, emit_env_t *env) {
671 char buf[SNPRINTF_BUF_LEN];
672 ir_fprintf(F, "\tjmp %s\t\t\t/* Jmp(%+F) */\n", get_cfop_target(irn, buf), get_irn_link(irn));
677 /****************************
680 * _ __ _ __ ___ _ ___
681 * | '_ \| '__/ _ \| |/ __|
682 * | |_) | | | (_) | |\__ \
683 * | .__/|_| \___/| ||___/
686 ****************************/
689 * Emits code for a proj -> node
691 void emit_Proj(const ir_node *irn, emit_env_t *env) {
692 ir_node *pred = get_Proj_pred(irn);
694 if (get_irn_op(pred) == op_Start) {
695 switch(get_Proj_proj(irn)) {
696 case pn_Start_X_initial_exec:
705 /**********************************
708 * | | ___ _ __ _ _| |_) |
709 * | | / _ \| '_ \| | | | _ <
710 * | |___| (_) | |_) | |_| | |_) |
711 * \_____\___/| .__/ \__, |____/
714 **********************************/
716 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
717 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
718 fprintf(F, "\tcld\t\t\t\t/* copy direction forward*/\n");
722 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 1 */\n");
725 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 2 */\n");
728 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 3 */\n");
729 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 3 */\n");
734 void emit_ia32_CopyB(const ir_node *irn, emit_env_t *emit_env) {
735 FILE *F = emit_env->out;
736 tarval *tv = get_ia32_Immop_tarval(irn);
737 int rem = get_tarval_long(tv);
738 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
740 emit_CopyB_prolog(F, rem, size);
742 fprintf(F, "\trep movsd\t\t\t\t/* memcopy */\n");
745 void emit_ia32_CopyB_i(const ir_node *irn, emit_env_t *emit_env) {
746 tarval *tv = get_ia32_Immop_tarval(irn);
747 int size = get_tarval_long(tv);
748 FILE *F = emit_env->out;
750 emit_CopyB_prolog(F, size & 0x3, size);
754 fprintf(F, "\tmovsd\t\t\t\t/* memcopy unrolled */\n");
760 /*******************************************
763 * | |__ ___ _ __ ___ __| | ___ ___
764 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
765 * | |_) | __/ | | | (_) | (_| | __/\__ \
766 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
768 *******************************************/
770 void emit_be_Call(const ir_node *irn, emit_env_t *emit_env) {
771 FILE *F = emit_env->out;
773 lc_efprintf(ia32_get_arg_env(), F, "\tcall %3S\t\t\t/* %+F(%+F) (be_Call) */\n", irn, irn, get_irn_n(irn, 2));
776 void emit_be_IncSP(const ir_node *irn, emit_env_t *emit_env) {
777 FILE *F = emit_env->out;
778 unsigned offs = be_get_IncSP_offset(irn);
779 be_stack_dir_t dir = be_get_IncSP_direction(irn);
782 lc_efprintf(ia32_get_arg_env(), F, "\tadd %1S,%s%u\t\t\t/* %+F (IncSP) */\n", irn,
783 (dir == be_stack_dir_along) ? " -" : " ", offs, irn);
786 fprintf(F, "\t\t\t\t\t/* omitted IncSP with 0 */\n");
790 void emit_be_AddSP(const ir_node *irn, emit_env_t *emit_env) {
791 FILE *F = emit_env->out;
792 lc_efprintf(ia32_get_arg_env(), F, "\tadd %1D, %1S\t\t\t/* %+F (AddSP) */\n", irn, irn, irn);
797 /***********************************************************************************
800 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
801 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
802 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
803 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
805 ***********************************************************************************/
808 * Enters the emitter functions for handled nodes into the generic
809 * pointer of an opcode.
811 static void ia32_register_emitters(void) {
813 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
814 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
815 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
817 /* first clear the generic function pointer for all ops */
818 clear_irp_opcodes_generic_func();
820 /* register all emitter functions defined in spec */
821 ia32_register_spec_emitters();
823 /* other ia32 emitter functions */
825 IA32_EMIT(SwitchJmp);
844 * Emits code for a node.
846 static void ia32_emit_node(const ir_node *irn, void *env) {
847 emit_env_t *emit_env = env;
848 firm_dbg_module_t *mod = emit_env->mod;
849 FILE *F = emit_env->out;
850 ir_op *op = get_irn_op(irn);
852 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
854 if (op->ops.generic) {
855 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
859 ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
864 * Walks over the nodes in a block connected by scheduling edges
865 * and emits code for each node.
867 static void ia32_gen_block(ir_node *block, void *env) {
870 if (! is_Block(block))
873 fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
874 sched_foreach(block, irn) {
875 ia32_emit_node(irn, env);
881 * Emits code for function start.
883 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
884 const char *irg_name = get_entity_name(get_irg_entity(irg));
886 fprintf(F, "\t.text\n");
887 fprintf(F, ".globl %s\n", irg_name);
888 fprintf(F, "\t.type\t%s, @function\n", irg_name);
889 fprintf(F, "%s:\n", irg_name);
893 * Emits code for function end
895 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
896 const char *irg_name = get_entity_name(get_irg_entity(irg));
898 fprintf(F, "\tret\n");
899 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
903 * Sets labels for control flow nodes (jump target)
904 * TODO: Jump optimization
906 static void ia32_gen_labels(ir_node *block, void *env) {
908 int n = get_Block_n_cfgpreds(block);
910 for (n--; n >= 0; n--) {
911 pred = get_Block_cfgpred(block, n);
912 set_irn_link(pred, block);
917 * Main driver. Emits the code for one routine.
919 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
922 emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
924 emit_env.arch_env = cg->arch_env;
927 /* set the global arch_env (needed by print hooks) */
928 arch_env = cg->arch_env;
930 ia32_register_emitters();
932 ia32_emit_func_prolog(F, irg);
933 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
934 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
935 ia32_emit_func_epilog(F, irg);