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;
121 obst = xcalloc(1, sizeof(*obst));
124 obstack_free(obst, NULL);
127 /* obstack_free with NULL results in an uninitialized obstack */
130 obstack_printf(obst, "[");
132 if (am_flav & ia32_B) {
133 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
137 if (am_flav & ia32_I) {
139 obstack_printf(obst, "+");
142 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
144 if (am_flav & ia32_S) {
145 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
151 if (am_flav & ia32_O) {
152 obstack_printf(obst, get_ia32_am_offs(n));
155 obstack_printf(obst, "] ");
157 size = obstack_object_size(obst);
158 s = obstack_finish(obst);
164 /*************************************************************
166 * (_) | | / _| | | | |
167 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
168 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
169 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
170 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
173 *************************************************************/
175 /* We always pass the ir_node which is a pointer. */
176 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
177 return lc_arg_type_ptr;
182 * Returns the register at in position pos.
184 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
186 const arch_register_t *reg = NULL;
188 assert(get_irn_arity(irn) > pos && "Invalid IN position");
190 /* The out register of the operator at position pos is the
191 in register we need. */
192 op = get_irn_n(irn, pos);
194 reg = arch_get_irn_register(arch_env, op);
196 assert(reg && "no in register found");
201 * Returns the register at out position pos.
203 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
205 const arch_register_t *reg = NULL;
207 assert(get_irn_n_edges(irn) > pos && "Invalid OUT position");
209 /* 1st case: irn is not of mode_T, so it has only */
210 /* one OUT register -> good */
211 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
212 /* Proj with the corresponding projnum for the register */
214 if (get_irn_mode(irn) != mode_T) {
215 reg = arch_get_irn_register(arch_env, irn);
217 else if (is_ia32_irn(irn)) {
218 reg = get_ia32_out_reg(irn, pos);
221 const ir_edge_t *edge;
223 foreach_out_edge(irn, edge) {
224 proj = get_edge_src_irn(edge);
225 assert(is_Proj(proj) && "non-Proj from mode_T node");
226 if (get_Proj_proj(proj) == pos) {
227 reg = arch_get_irn_register(arch_env, proj);
233 assert(reg && "no out register found");
243 * Returns the name of the in register at position pos.
245 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
246 const arch_register_t *reg;
248 if (in_out == IN_REG) {
249 reg = get_in_reg(irn, pos);
252 /* destination address mode nodes don't have outputs */
253 if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
257 reg = get_out_reg(irn, pos);
260 return arch_register_get_name(reg);
264 * Get the register name for a node.
266 static int ia32_get_reg_name(lc_appendable_t *app,
267 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
270 ir_node *X = arg->v_ptr;
271 int nr = occ->width - 1;
274 return lc_arg_append(app, occ, "(null)", 6);
276 buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
278 return lc_arg_append(app, occ, buf, strlen(buf));
282 * Returns the tarval, offset or scale of an ia32 as a string.
284 static int ia32_const_to_str(lc_appendable_t *app,
285 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
288 ir_node *X = arg->v_ptr;
291 return lc_arg_append(app, occ, "(null)", 6);
293 if (occ->conversion == 'C') {
294 buf = get_ia32_cnst(X);
297 buf = get_ia32_am_offs(X);
300 return buf ? lc_arg_append(app, occ, buf, strlen(buf)) : 0;
304 * Determines the SSE suffix depending on the mode.
306 static int ia32_get_mode_suffix(lc_appendable_t *app,
307 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
309 ir_node *X = arg->v_ptr;
312 return lc_arg_append(app, occ, "(null)", 6);
314 return lc_appendable_chadd(app, get_mode_size_bits(get_irn_mode(X)) == 32 ? 's' : 'd');
318 * Return the ia32 printf arg environment.
319 * We use the firm environment with some additional handlers.
321 const lc_arg_env_t *ia32_get_arg_env(void) {
322 static lc_arg_env_t *env = NULL;
324 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
325 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
326 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
329 /* extend the firm printer */
330 env = firm_get_arg_env();
332 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
333 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
334 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
335 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
336 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
344 * Add a number to a prefix. This number will not be used a second time.
346 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
347 static unsigned long id = 0;
348 snprintf(buf, buflen, "%s%lu", prefix, ++id);
353 /*************************************************
356 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
357 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
358 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
359 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
361 *************************************************/
364 * coding of conditions
366 struct cmp2conditon_t {
372 * positive conditions for signed compares
374 static const struct cmp2conditon_t cmp2condition_s[] = {
375 { NULL, pn_Cmp_False }, /* always false */
376 { "e", pn_Cmp_Eq }, /* == */
377 { "l", pn_Cmp_Lt }, /* < */
378 { "le", pn_Cmp_Le }, /* <= */
379 { "g", pn_Cmp_Gt }, /* > */
380 { "ge", pn_Cmp_Ge }, /* >= */
381 { "ne", pn_Cmp_Lg }, /* != */
382 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
383 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
384 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
385 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
386 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
387 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
388 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
389 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
390 { NULL, pn_Cmp_True }, /* always true */
394 * positive conditions for unsigned compares
396 static const struct cmp2conditon_t cmp2condition_u[] = {
397 { NULL, pn_Cmp_False }, /* always false */
398 { "e", pn_Cmp_Eq }, /* == */
399 { "b", pn_Cmp_Lt }, /* < */
400 { "be", pn_Cmp_Le }, /* <= */
401 { "a", pn_Cmp_Gt }, /* > */
402 { "ae", 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 * returns the condition code
418 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
420 assert(cmp2condition_s[cmp_code].num == cmp_code);
421 assert(cmp2condition_u[cmp_code].num == cmp_code);
423 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
427 * Returns the target label for a control flow node.
429 static char *get_cfop_target(const ir_node *irn, char *buf) {
430 ir_node *bl = get_irn_link(irn);
432 snprintf(buf, SNPRINTF_BUF_LEN, "BLOCK_%ld", get_irn_node_nr(bl));
437 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
439 static void finish_CondJmp(FILE *F, const ir_node *irn) {
441 const ir_edge_t *edge;
442 char buf[SNPRINTF_BUF_LEN];
444 edge = get_irn_out_edge_first(irn);
445 proj = get_edge_src_irn(edge);
446 assert(is_Proj(proj) && "CondJmp with a non-Proj");
448 if (get_Proj_proj(proj) == 1) {
449 fprintf(F, "\tj%s %s\t\t\t/* cmp(a, b) == TRUE */\n",
450 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
451 get_cfop_target(proj, buf));
454 fprintf(F, "\tjn%s %s\t\t\t/* cmp(a, b) == FALSE */\n",
455 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
456 get_cfop_target(proj, buf));
459 edge = get_irn_out_edge_next(irn, edge);
461 proj = get_edge_src_irn(edge);
462 assert(is_Proj(proj) && "CondJmp with a non-Proj");
463 fprintf(F, "\tjmp %s\t\t\t/* otherwise */\n", get_cfop_target(proj, buf));
468 * Emits code for conditional jump with two variables.
470 static void emit_ia32_CondJmp(const ir_node *irn, emit_env_t *env) {
473 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp(%+F, %+F) */\n",
474 ia32_emit_binop(irn), get_irn_n(irn, 0), get_irn_n(irn, 1));
475 finish_CondJmp(F, irn);
479 * Emits code for conditional jump with immediate.
481 void emit_ia32_CondJmp_i(const ir_node *irn, emit_env_t *env) {
484 lc_efprintf(ia32_get_arg_env(), F, "\tcmp %s\t\t\t/* CondJmp_i(%+F) */\n",
485 ia32_emit_binop(irn), get_irn_n(irn, 0));
486 finish_CondJmp(F, irn);
491 /*********************************************************
494 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
495 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
496 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
497 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
500 *********************************************************/
502 /* jump table entry (target and corresponding number) */
503 typedef struct _branch_t {
508 /* jump table for switch generation */
509 typedef struct _jmp_tbl_t {
510 ir_node *defProj; /**< default target */
511 int min_value; /**< smallest switch case */
512 int max_value; /**< largest switch case */
513 int num_branches; /**< number of jumps */
514 char *label; /**< label of the jump table */
515 branch_t *branches; /**< jump array */
519 * Compare two variables of type branch_t. Used to sort all switch cases
521 static int ia32_cmp_branch_t(const void *a, const void *b) {
522 branch_t *b1 = (branch_t *)a;
523 branch_t *b2 = (branch_t *)b;
525 if (b1->value <= b2->value)
532 * Emits code for a SwitchJmp (creates a jump table if
533 * possible otherwise a cmp-jmp cascade). Port from
536 void emit_ia32_SwitchJmp(const ir_node *irn, emit_env_t *emit_env) {
537 unsigned long interval;
538 char buf[SNPRINTF_BUF_LEN];
539 int last_value, i, pn, do_jmp_tbl = 1;
542 const ir_edge_t *edge;
543 const lc_arg_env_t *env = ia32_get_arg_env();
544 FILE *F = emit_env->out;
546 /* fill the table structure */
547 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
548 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
550 tbl.num_branches = get_irn_n_edges(irn);
551 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
552 tbl.min_value = INT_MAX;
553 tbl.max_value = INT_MIN;
556 /* go over all proj's and collect them */
557 foreach_out_edge(irn, edge) {
558 proj = get_edge_src_irn(edge);
559 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
561 pn = get_Proj_proj(proj);
563 /* create branch entry */
564 tbl.branches[i].target = proj;
565 tbl.branches[i].value = pn;
567 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
568 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
570 /* check for default proj */
571 if (pn == get_ia32_pncode(irn)) {
572 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
579 /* sort the branches by their number */
580 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
582 /* two-complement's magic make this work without overflow */
583 interval = tbl.max_value - tbl.min_value;
585 /* check value interval */
586 if (interval > 16 * 1024) {
590 /* check ratio of value interval to number of branches */
591 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
597 if (tbl.min_value != 0) {
598 lc_efprintf(env, F, "\tcmpl %lu, -%d(%1S)\t\t/* first switch value is not 0 */\n",
599 interval, tbl.min_value, irn);
602 lc_efprintf(env, F, "\tcmpl %lu, %1S\t\t\t/* compare for switch */\n", interval, irn);
605 fprintf(F, "\tja %s\t\t\t/* default jump if out of range */\n", get_cfop_target(tbl.defProj, buf));
607 if (tbl.num_branches > 1) {
610 lc_efprintf(env, F, "\tjmp [%1S*4+%s]\t\t/* get jump table entry as target */\n", irn, tbl.label);
612 fprintf(F, "\t.section\t.rodata\t\t/* start jump table */\n");
613 fprintf(F, "\t.align 4\n");
615 fprintf(F, "%s:\n", tbl.label);
616 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[0].target, buf), tbl.branches[0].value);
618 last_value = tbl.branches[0].value;
619 for (i = 1; i < tbl.num_branches; ++i) {
620 while (++last_value < tbl.branches[i].value) {
621 fprintf(F, "\t.long %s\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
623 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[i].target, buf), last_value);
626 fprintf(F, "\t.text\t\t\t\t/* end of jump table */\n");
629 /* one jump is enough */
630 fprintf(F, "\tjmp %s\t\t/* only one case given */\n", get_cfop_target(tbl.branches[0].target, buf));
633 else { // no jump table
634 for (i = 0; i < tbl.num_branches; ++i) {
635 lc_efprintf(env, F, "\tcmpl %d, %1S\t\t\t/* case %d */\n", tbl.branches[i].value, irn, i);
636 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
639 fprintf(F, "\tjmp %s\t\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
649 * Emits code for a unconditional jump.
651 void emit_Jmp(const ir_node *irn, emit_env_t *env) {
654 char buf[SNPRINTF_BUF_LEN];
655 ir_fprintf(F, "\tjmp %s\t\t\t/* Jmp(%+F) */\n", get_cfop_target(irn, buf), get_irn_link(irn));
660 /****************************
663 * _ __ _ __ ___ _ ___
664 * | '_ \| '__/ _ \| |/ __|
665 * | |_) | | | (_) | |\__ \
666 * | .__/|_| \___/| ||___/
669 ****************************/
672 * Emits code for a proj -> node
674 void emit_Proj(const ir_node *irn, emit_env_t *env) {
675 ir_node *pred = get_Proj_pred(irn);
677 if (get_irn_op(pred) == op_Start) {
678 switch(get_Proj_proj(irn)) {
679 case pn_Start_X_initial_exec:
688 /**********************************
691 * | | ___ _ __ _ _| |_) |
692 * | | / _ \| '_ \| | | | _ <
693 * | |___| (_) | |_) | |_| | |_) |
694 * \_____\___/| .__/ \__, |____/
697 **********************************/
699 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
700 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
701 fprintf(F, "\tcld\t\t\t\t/* copy direction forward*/\n");
705 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 1 */\n");
708 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 2 */\n");
711 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 3 */\n");
712 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 3 */\n");
717 void emit_ia32_CopyB(const ir_node *irn, emit_env_t *emit_env) {
718 FILE *F = emit_env->out;
719 tarval *tv = get_ia32_Immop_tarval(irn);
720 int rem = get_tarval_long(tv);
721 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
723 emit_CopyB_prolog(F, rem, size);
725 fprintf(F, "\trep movsd\t\t\t\t/* memcopy */\n");
728 void emit_ia32_CopyB_i(const ir_node *irn, emit_env_t *emit_env) {
729 tarval *tv = get_ia32_Immop_tarval(irn);
730 int size = get_tarval_long(tv);
731 FILE *F = emit_env->out;
733 emit_CopyB_prolog(F, size & 0x3, size);
737 fprintf(F, "\tmovsd\t\t\t\t/* memcopy unrolled */\n");
743 /*******************************************
746 * | |__ ___ _ __ ___ __| | ___ ___
747 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
748 * | |_) | __/ | | | (_) | (_| | __/\__ \
749 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
751 *******************************************/
753 void emit_be_Call(const ir_node *irn, emit_env_t *emit_env) {
754 FILE *F = emit_env->out;
756 lc_efprintf(ia32_get_arg_env(), F, "\tcall %3S\t\t\t/* %+F(%+F) (be_Call) */\n", irn, irn, get_irn_n(irn, 2));
759 void emit_be_IncSP(const ir_node *irn, emit_env_t *emit_env) {
760 FILE *F = emit_env->out;
761 unsigned offs = be_get_IncSP_offset(irn);
762 be_stack_dir_t dir = be_get_IncSP_direction(irn);
765 lc_efprintf(ia32_get_arg_env(), F, "\tadd %1S,%s%u\t\t\t/* %+F (IncSP) */\n", irn,
766 (dir == be_stack_dir_along) ? " -" : " ", offs, irn);
769 fprintf(F, "\t\t\t\t\t/* omitted IncSP with 0 */\n");
773 void emit_be_SetSP(const ir_node *irn, emit_env_t *emit_env) {
774 FILE *F = emit_env->out;
776 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%3S\t\t\t/* restore SP */\n", irn, irn);
779 void emit_be_Copy(const ir_node *irn, emit_env_t *emit_env) {
780 FILE *F = emit_env->out;
782 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%1S\t\t\t/* %+F */\n", irn, irn, irn);
785 void emit_be_Perm(const ir_node *irn, emit_env_t *emit_env) {
786 FILE *F = emit_env->out;
788 lc_efprintf(ia32_get_arg_env(), F, "\txchg %1S, %2S\t\t\t/* %+F(%1A, %2A) */\n", irn, irn, irn);
791 /***********************************************************************************
794 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
795 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
796 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
797 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
799 ***********************************************************************************/
802 * Enters the emitter functions for handled nodes into the generic
803 * pointer of an opcode.
805 static void ia32_register_emitters(void) {
807 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
808 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
809 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
811 /* first clear the generic function pointer for all ops */
812 clear_irp_opcodes_generic_func();
814 /* register all emitter functions defined in spec */
815 ia32_register_spec_emitters();
817 /* other ia32 emitter functions */
819 IA32_EMIT(SwitchJmp);
840 * Emits code for a node.
842 static void ia32_emit_node(const ir_node *irn, void *env) {
843 emit_env_t *emit_env = env;
844 firm_dbg_module_t *mod = emit_env->mod;
845 FILE *F = emit_env->out;
846 ir_op *op = get_irn_op(irn);
848 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
850 if (op->ops.generic) {
851 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
855 ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
860 * Walks over the nodes in a block connected by scheduling edges
861 * and emits code for each node.
863 static void ia32_gen_block(ir_node *block, void *env) {
866 if (! is_Block(block))
869 fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
870 sched_foreach(block, irn) {
871 ia32_emit_node(irn, env);
877 * Emits code for function start.
879 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
880 const char *irg_name = get_entity_name(get_irg_entity(irg));
882 fprintf(F, "\t.text\n");
883 fprintf(F, ".globl %s\n", irg_name);
884 fprintf(F, "\t.type\t%s, @function\n", irg_name);
885 fprintf(F, "%s:\n", irg_name);
889 * Emits code for function end
891 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
892 const char *irg_name = get_entity_name(get_irg_entity(irg));
894 fprintf(F, "\tret\n");
895 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
899 * Sets labels for control flow nodes (jump target)
900 * TODO: Jump optimization
902 static void ia32_gen_labels(ir_node *block, void *env) {
904 int n = get_Block_n_cfgpreds(block);
906 for (n--; n >= 0; n--) {
907 pred = get_Block_cfgpred(block, n);
908 set_irn_link(pred, block);
913 * Main driver. Emits the code for one routine.
915 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
918 emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
920 emit_env.arch_env = cg->arch_env;
923 /* set the global arch_env (needed by print hooks) */
924 arch_env = cg->arch_env;
926 ia32_register_emitters();
928 ia32_emit_func_prolog(F, irg);
929 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
930 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
931 ia32_emit_func_epilog(F, irg);