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 ");
143 obstack_printf(obst, "DWORD PTR ");
146 assert(0 && "unsupported mode size");
150 obstack_printf(obst, "[");
152 if (am_flav & ia32_B) {
153 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
157 if (am_flav & ia32_I) {
159 obstack_printf(obst, "+");
162 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
164 if (am_flav & ia32_S) {
165 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
171 if (am_flav & ia32_O) {
172 obstack_printf(obst, get_ia32_am_offs(n));
175 obstack_printf(obst, "] ");
177 size = obstack_object_size(obst);
178 s = obstack_finish(obst);
184 /*************************************************************
186 * (_) | | / _| | | | |
187 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
188 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
189 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
190 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
193 *************************************************************/
195 /* We always pass the ir_node which is a pointer. */
196 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
197 return lc_arg_type_ptr;
202 * Returns the register at in position pos.
204 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
206 const arch_register_t *reg = NULL;
208 assert(get_irn_arity(irn) > pos && "Invalid IN position");
210 /* The out register of the operator at position pos is the
211 in register we need. */
212 op = get_irn_n(irn, pos);
214 reg = arch_get_irn_register(arch_env, op);
216 assert(reg && "no in register found");
221 * Returns the register at out position pos.
223 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
225 const arch_register_t *reg = NULL;
227 /* 1st case: irn is not of mode_T, so it has only */
228 /* one OUT register -> good */
229 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
230 /* Proj with the corresponding projnum for the register */
232 if (get_irn_mode(irn) != mode_T) {
233 reg = arch_get_irn_register(arch_env, irn);
235 else if (is_ia32_irn(irn)) {
236 reg = get_ia32_out_reg(irn, pos);
239 const ir_edge_t *edge;
241 foreach_out_edge(irn, edge) {
242 proj = get_edge_src_irn(edge);
243 assert(is_Proj(proj) && "non-Proj from mode_T node");
244 if (get_Proj_proj(proj) == pos) {
245 reg = arch_get_irn_register(arch_env, proj);
251 assert(reg && "no out register found");
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 (is_ia32_irn(irn) && 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 %s\t\t\t/* CondJmp(%+F, %+F) */\n",
492 ia32_emit_binop(irn), 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 %s\t\t\t/* CondJmp_i(%+F) */\n",
503 ia32_emit_binop(irn), get_irn_n(irn, 0));
504 finish_CondJmp(F, irn);
509 /*********************************************************
512 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
513 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
514 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
515 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
518 *********************************************************/
520 /* jump table entry (target and corresponding number) */
521 typedef struct _branch_t {
526 /* jump table for switch generation */
527 typedef struct _jmp_tbl_t {
528 ir_node *defProj; /**< default target */
529 int min_value; /**< smallest switch case */
530 int max_value; /**< largest switch case */
531 int num_branches; /**< number of jumps */
532 char *label; /**< label of the jump table */
533 branch_t *branches; /**< jump array */
537 * Compare two variables of type branch_t. Used to sort all switch cases
539 static int ia32_cmp_branch_t(const void *a, const void *b) {
540 branch_t *b1 = (branch_t *)a;
541 branch_t *b2 = (branch_t *)b;
543 if (b1->value <= b2->value)
550 * Emits code for a SwitchJmp (creates a jump table if
551 * possible otherwise a cmp-jmp cascade). Port from
554 void emit_ia32_SwitchJmp(const ir_node *irn, emit_env_t *emit_env) {
555 unsigned long interval;
556 char buf[SNPRINTF_BUF_LEN];
557 int last_value, i, pn, do_jmp_tbl = 1;
560 const ir_edge_t *edge;
561 const lc_arg_env_t *env = ia32_get_arg_env();
562 FILE *F = emit_env->out;
564 /* fill the table structure */
565 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
566 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
568 tbl.num_branches = get_irn_n_edges(irn);
569 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
570 tbl.min_value = INT_MAX;
571 tbl.max_value = INT_MIN;
574 /* go over all proj's and collect them */
575 foreach_out_edge(irn, edge) {
576 proj = get_edge_src_irn(edge);
577 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
579 pn = get_Proj_proj(proj);
581 /* create branch entry */
582 tbl.branches[i].target = proj;
583 tbl.branches[i].value = pn;
585 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
586 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
588 /* check for default proj */
589 if (pn == get_ia32_pncode(irn)) {
590 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
597 /* sort the branches by their number */
598 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
600 /* two-complement's magic make this work without overflow */
601 interval = tbl.max_value - tbl.min_value;
603 /* check value interval */
604 if (interval > 16 * 1024) {
608 /* check ratio of value interval to number of branches */
609 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
615 if (tbl.min_value != 0) {
616 lc_efprintf(env, F, "\tcmpl %lu, -%d(%1S)\t\t/* first switch value is not 0 */\n",
617 interval, tbl.min_value, irn);
620 lc_efprintf(env, F, "\tcmpl %lu, %1S\t\t\t/* compare for switch */\n", interval, irn);
623 fprintf(F, "\tja %s\t\t\t/* default jump if out of range */\n", get_cfop_target(tbl.defProj, buf));
625 if (tbl.num_branches > 1) {
628 lc_efprintf(env, F, "\tjmp [%1S*4+%s]\t\t/* get jump table entry as target */\n", irn, tbl.label);
630 fprintf(F, "\t.section\t.rodata\t\t/* start jump table */\n");
631 fprintf(F, "\t.align 4\n");
633 fprintf(F, "%s:\n", tbl.label);
634 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[0].target, buf), tbl.branches[0].value);
636 last_value = tbl.branches[0].value;
637 for (i = 1; i < tbl.num_branches; ++i) {
638 while (++last_value < tbl.branches[i].value) {
639 fprintf(F, "\t.long %s\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
641 fprintf(F, "\t.long %s\t\t\t/* case %d */\n", get_cfop_target(tbl.branches[i].target, buf), last_value);
644 fprintf(F, "\t.text\t\t\t\t/* end of jump table */\n");
647 /* one jump is enough */
648 fprintf(F, "\tjmp %s\t\t/* only one case given */\n", get_cfop_target(tbl.branches[0].target, buf));
651 else { // no jump table
652 for (i = 0; i < tbl.num_branches; ++i) {
653 lc_efprintf(env, F, "\tcmpl %d, %1S\t\t\t/* case %d */\n", tbl.branches[i].value, irn, i);
654 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
657 fprintf(F, "\tjmp %s\t\t\t/* default case */\n", get_cfop_target(tbl.defProj, buf));
667 * Emits code for a unconditional jump.
669 void emit_Jmp(const ir_node *irn, emit_env_t *env) {
672 char buf[SNPRINTF_BUF_LEN];
673 ir_fprintf(F, "\tjmp %s\t\t\t/* Jmp(%+F) */\n", get_cfop_target(irn, buf), get_irn_link(irn));
678 /****************************
681 * _ __ _ __ ___ _ ___
682 * | '_ \| '__/ _ \| |/ __|
683 * | |_) | | | (_) | |\__ \
684 * | .__/|_| \___/| ||___/
687 ****************************/
690 * Emits code for a proj -> node
692 void emit_Proj(const ir_node *irn, emit_env_t *env) {
693 ir_node *pred = get_Proj_pred(irn);
695 if (get_irn_op(pred) == op_Start) {
696 switch(get_Proj_proj(irn)) {
697 case pn_Start_X_initial_exec:
706 /**********************************
709 * | | ___ _ __ _ _| |_) |
710 * | | / _ \| '_ \| | | | _ <
711 * | |___| (_) | |_) | |_| | |_) |
712 * \_____\___/| .__/ \__, |____/
715 **********************************/
717 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
718 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
719 fprintf(F, "\tcld\t\t\t\t/* copy direction forward*/\n");
723 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 1 */\n");
726 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 2 */\n");
729 fprintf(F, "\tmovsb\t\t\t\t/* memcopy remainder 3 */\n");
730 fprintf(F, "\tmovsw\t\t\t\t/* memcopy remainder 3 */\n");
735 void emit_ia32_CopyB(const ir_node *irn, emit_env_t *emit_env) {
736 FILE *F = emit_env->out;
737 tarval *tv = get_ia32_Immop_tarval(irn);
738 int rem = get_tarval_long(tv);
739 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
741 emit_CopyB_prolog(F, rem, size);
743 fprintf(F, "\trep movsd\t\t\t\t/* memcopy */\n");
746 void emit_ia32_CopyB_i(const ir_node *irn, emit_env_t *emit_env) {
747 tarval *tv = get_ia32_Immop_tarval(irn);
748 int size = get_tarval_long(tv);
749 FILE *F = emit_env->out;
751 emit_CopyB_prolog(F, size & 0x3, size);
755 fprintf(F, "\tmovsd\t\t\t\t/* memcopy unrolled */\n");
761 /*******************************************
764 * | |__ ___ _ __ ___ __| | ___ ___
765 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
766 * | |_) | __/ | | | (_) | (_| | __/\__ \
767 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
769 *******************************************/
771 void emit_be_Call(const ir_node *irn, emit_env_t *emit_env) {
772 FILE *F = emit_env->out;
773 entity *ent = be_Call_get_entity(irn);
775 fprintf(F, "\tcall ");
778 fprintf(F, "%s", get_entity_name(ent));
781 lc_efprintf(ia32_get_arg_env(), F, "%1D", get_irn_n(irn, be_pos_Call_ptr));
784 ir_fprintf(F, "\t\t\t/* %+F (be_Call) */\n", irn);
787 void emit_be_IncSP(const ir_node *irn, emit_env_t *emit_env) {
788 FILE *F = emit_env->out;
789 unsigned offs = be_get_IncSP_offset(irn);
790 be_stack_dir_t dir = be_get_IncSP_direction(irn);
793 lc_efprintf(ia32_get_arg_env(), F, "\tadd %1S,%s%u\t\t\t/* %+F (IncSP) */\n", irn,
794 (dir == be_stack_dir_along) ? " -" : " ", offs, irn);
797 fprintf(F, "\t\t\t\t\t/* omitted IncSP with 0 */\n");
801 void emit_be_SetSP(const ir_node *irn, emit_env_t *emit_env) {
802 FILE *F = emit_env->out;
804 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%3S\t\t\t/* restore SP */\n", irn, irn);
807 void emit_be_Copy(const ir_node *irn, emit_env_t *emit_env) {
808 FILE *F = emit_env->out;
810 lc_efprintf(ia32_get_arg_env(), F, "\tmov %1D,%1S\t\t\t/* %+F */\n", irn, irn, irn);
813 void emit_be_Perm(const ir_node *irn, emit_env_t *emit_env) {
814 FILE *F = emit_env->out;
816 lc_efprintf(ia32_get_arg_env(), F, "\txchg %1S, %2S\t\t\t/* %+F(%1A, %2A) */\n", irn, irn, irn);
819 /***********************************************************************************
822 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
823 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
824 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
825 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
827 ***********************************************************************************/
830 * Enters the emitter functions for handled nodes into the generic
831 * pointer of an opcode.
833 static void ia32_register_emitters(void) {
835 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
836 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
837 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
839 /* first clear the generic function pointer for all ops */
840 clear_irp_opcodes_generic_func();
842 /* register all emitter functions defined in spec */
843 ia32_register_spec_emitters();
845 /* other ia32 emitter functions */
847 IA32_EMIT(SwitchJmp);
868 * Emits code for a node.
870 static void ia32_emit_node(const ir_node *irn, void *env) {
871 emit_env_t *emit_env = env;
872 firm_dbg_module_t *mod = emit_env->mod;
873 FILE *F = emit_env->out;
874 ir_op *op = get_irn_op(irn);
876 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
878 if (op->ops.generic) {
879 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
883 ir_fprintf(F, "\t\t\t\t\t/* %+F */\n", irn);
888 * Walks over the nodes in a block connected by scheduling edges
889 * and emits code for each node.
891 static void ia32_gen_block(ir_node *block, void *env) {
894 if (! is_Block(block))
897 fprintf(((emit_env_t *)env)->out, "BLOCK_%ld:\n", get_irn_node_nr(block));
898 sched_foreach(block, irn) {
899 ia32_emit_node(irn, env);
905 * Emits code for function start.
907 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
908 const char *irg_name = get_entity_name(get_irg_entity(irg));
910 fprintf(F, "\t.text\n");
911 fprintf(F, ".globl %s\n", irg_name);
912 fprintf(F, "\t.type\t%s, @function\n", irg_name);
913 fprintf(F, "%s:\n", irg_name);
917 * Emits code for function end
919 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
920 const char *irg_name = get_entity_name(get_irg_entity(irg));
922 fprintf(F, "\tret\n");
923 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
927 * Sets labels for control flow nodes (jump target)
928 * TODO: Jump optimization
930 static void ia32_gen_labels(ir_node *block, void *env) {
932 int n = get_Block_n_cfgpreds(block);
934 for (n--; n >= 0; n--) {
935 pred = get_Block_cfgpred(block, n);
936 set_irn_link(pred, block);
941 * Main driver. Emits the code for one routine.
943 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
946 emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
948 emit_env.arch_env = cg->arch_env;
951 /* set the global arch_env (needed by print hooks) */
952 arch_env = cg->arch_env;
954 ia32_register_emitters();
956 ia32_emit_func_prolog(F, irg);
957 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
958 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
959 ia32_emit_func_epilog(F, irg);