2 * This file implements the node emitter.
22 #include "iredges_t.h"
24 #include "../besched_t.h"
25 #include "../benode_t.h"
27 #include "ia32_emitter.h"
28 #include "gen_ia32_emitter.h"
29 #include "ia32_nodes_attr.h"
30 #include "ia32_new_nodes.h"
31 #include "ia32_map_regs.h"
33 #ifdef obstack_chunk_alloc
34 # undef obstack_chunk_alloc
35 # define obstack_chunk_alloc xmalloc
37 # define obstack_chunk_alloc xmalloc
38 # define obstack_chunk_free free
41 #define BLOCK_PREFIX(x) ".L" x
43 extern int obstack_printf(struct obstack *obst, char *fmt, ...);
45 #define SNPRINTF_BUF_LEN 128
47 static const arch_env_t *arch_env = NULL;
49 /*************************************************************
51 * (_) | | / _| | | | |
52 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
53 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
54 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
55 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
58 *************************************************************/
60 /* We always pass the ir_node which is a pointer. */
61 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
62 return lc_arg_type_ptr;
67 * Returns the register at in position pos.
69 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
71 const arch_register_t *reg = NULL;
73 assert(get_irn_arity(irn) > pos && "Invalid IN position");
75 /* The out register of the operator at position pos is the
76 in register we need. */
77 op = get_irn_n(irn, pos);
79 reg = arch_get_irn_register(arch_env, op);
81 assert(reg && "no in register found");
86 * Returns the register at out position pos.
88 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
90 const arch_register_t *reg = NULL;
92 /* 1st case: irn is not of mode_T, so it has only */
93 /* one OUT register -> good */
94 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
95 /* Proj with the corresponding projnum for the register */
97 if (get_irn_mode(irn) != mode_T) {
98 reg = arch_get_irn_register(arch_env, irn);
100 else if (is_ia32_irn(irn)) {
101 reg = get_ia32_out_reg(irn, pos);
104 const ir_edge_t *edge;
106 foreach_out_edge(irn, edge) {
107 proj = get_edge_src_irn(edge);
108 assert(is_Proj(proj) && "non-Proj from mode_T node");
109 if (get_Proj_proj(proj) == pos) {
110 reg = arch_get_irn_register(arch_env, proj);
116 assert(reg && "no out register found");
126 * Returns the name of the in register at position pos.
128 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
129 const arch_register_t *reg;
131 static char *buf = NULL;
134 if (in_out == IN_REG) {
135 reg = get_in_reg(irn, pos);
138 /* destination address mode nodes don't have outputs */
139 if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
143 reg = get_out_reg(irn, pos);
146 name = arch_register_get_name(reg);
152 len = strlen(name) + 2;
153 buf = xcalloc(1, len);
155 snprintf(buf, len, "%%%s", name);
161 * Get the register name for a node.
163 static int ia32_get_reg_name(lc_appendable_t *app,
164 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
167 ir_node *X = arg->v_ptr;
168 int nr = occ->width - 1;
171 return lc_appendable_snadd(app, "(null)", 6);
173 buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
175 return lc_appendable_snadd(app, buf, strlen(buf));
179 * Returns the tarval, offset or scale of an ia32 as a string.
181 static int ia32_const_to_str(lc_appendable_t *app,
182 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
185 ir_node *X = arg->v_ptr;
188 return lc_arg_append(app, occ, "(null)", 6);
190 if (occ->conversion == 'C') {
191 buf = get_ia32_cnst(X);
194 buf = get_ia32_am_offs(X);
197 return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
201 * Determines the SSE suffix depending on the mode.
203 static int ia32_get_mode_suffix(lc_appendable_t *app,
204 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
206 ir_node *X = arg->v_ptr;
207 ir_mode *mode = get_irn_mode(X);
209 if (mode == mode_T) {
210 mode = is_ia32_AddrModeS(X) || is_ia32_AddrModeD(X) ? get_ia32_ls_mode(X) : get_ia32_res_mode(X);
214 return lc_arg_append(app, occ, "(null)", 6);
216 if (mode_is_float(mode)) {
217 return lc_appendable_chadd(app, get_mode_size_bits(mode) == 32 ? 's' : 'd');
220 return lc_appendable_chadd(app, mode_is_signed(mode) ? 's' : 'z');
225 * Return the ia32 printf arg environment.
226 * We use the firm environment with some additional handlers.
228 const lc_arg_env_t *ia32_get_arg_env(void) {
229 static lc_arg_env_t *env = NULL;
231 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
232 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
233 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
236 /* extend the firm printer */
237 env = firm_get_arg_env();
239 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
240 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
241 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
242 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
243 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
250 * Emits registers and/or address mode of a binary operation.
252 char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
253 static char *buf = NULL;
255 /* verify that this function is never called on non-AM supporting operations */
256 //assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
258 #define PRODUCES_RESULT(n) \
259 (!(is_ia32_St(n) || \
260 is_ia32_Store8Bit(n) || \
261 is_ia32_CondJmp(n) || \
262 is_ia32_fCondJmp(n) || \
263 is_ia32_SwitchJmp(n)))
266 buf = xcalloc(1, SNPRINTF_BUF_LEN);
269 memset(buf, 0, SNPRINTF_BUF_LEN);
272 switch(get_ia32_op_type(n)) {
274 if (get_ia32_cnst(n)) {
275 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
278 const arch_register_t *in1 = get_in_reg(n, 2);
279 const arch_register_t *in2 = get_in_reg(n, 3);
280 const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
281 const arch_register_t *in;
283 in = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
284 out = out ? out : in1;
286 snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", \
287 arch_register_get_name(out), arch_register_get_name(in));
291 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n, env));
294 if (get_ia32_cnst(n)) {
295 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %s", ia32_emit_am(n, env), get_ia32_cnst(n));
298 const arch_register_t *in1 = get_in_reg(n, 2);
299 const char *reg_name;
300 ir_mode *mode = get_ia32_res_mode(n);
302 mode = mode ? mode : get_ia32_ls_mode(n);
304 switch(get_mode_size_bits(mode)) {
306 reg_name = ia32_get_mapped_reg_name(env->isa->regs_8bit, in1);
309 reg_name = ia32_get_mapped_reg_name(env->isa->regs_16bit, in1);
312 reg_name = arch_register_get_name(in1);
315 assert(0 && "unsupported mode size");
319 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %%%s", ia32_emit_am(n, env), reg_name);
323 assert(0 && "unsupported op type");
326 #undef PRODUCES_RESULT
332 * Emits registers and/or address mode of a unary operation.
334 char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
335 static char *buf = NULL;
338 buf = xcalloc(1, SNPRINTF_BUF_LEN);
341 memset(buf, 0, SNPRINTF_BUF_LEN);
344 switch(get_ia32_op_type(n)) {
346 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
349 snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n, env));
352 assert(0 && "unsupported op type");
359 * Emits address mode.
361 char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
362 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
366 static struct obstack *obst = NULL;
367 ir_mode *mode = get_ia32_ls_mode(n);
369 if (! is_ia32_Lea(n))
370 assert(mode && "AM node must have ls_mode attribute set.");
373 obst = xcalloc(1, sizeof(*obst));
376 obstack_free(obst, NULL);
379 /* obstack_free with NULL results in an uninitialized obstack */
383 switch (get_mode_size_bits(mode)) {
385 obstack_printf(obst, "BYTE PTR ");
388 obstack_printf(obst, "WORD PTR ");
391 obstack_printf(obst, "DWORD PTR ");
398 obstack_printf(obst, "[");
400 if (am_flav & ia32_B) {
401 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
405 if (am_flav & ia32_I) {
407 obstack_printf(obst, "+");
410 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
412 if (am_flav & ia32_S) {
413 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
419 if (am_flav & ia32_O) {
420 obstack_printf(obst, get_ia32_am_offs(n));
423 obstack_printf(obst, "] ");
425 size = obstack_object_size(obst);
426 s = obstack_finish(obst);
435 * Formated print of commands and comments.
437 static void ia32_fprintf_format(FILE *F, char *cmd_buf, char *cmnt_buf) {
438 fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
444 * Add a number to a prefix. This number will not be used a second time.
446 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
447 static unsigned long id = 0;
448 snprintf(buf, buflen, "%s%lu", prefix, ++id);
454 /*************************************************
457 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
458 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
459 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
460 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
462 *************************************************/
465 #define IA32_DO_EMIT ia32_fprintf_format(F, cmd_buf, cmnt_buf)
468 * coding of conditions
470 struct cmp2conditon_t {
476 * positive conditions for signed compares
478 static const struct cmp2conditon_t cmp2condition_s[] = {
479 { NULL, pn_Cmp_False }, /* always false */
480 { "e", pn_Cmp_Eq }, /* == */
481 { "l", pn_Cmp_Lt }, /* < */
482 { "le", pn_Cmp_Le }, /* <= */
483 { "g", pn_Cmp_Gt }, /* > */
484 { "ge", pn_Cmp_Ge }, /* >= */
485 { "ne", pn_Cmp_Lg }, /* != */
486 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
487 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
488 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
489 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
490 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
491 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
492 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
493 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
494 { NULL, pn_Cmp_True }, /* always true */
498 * positive conditions for unsigned compares
500 static const struct cmp2conditon_t cmp2condition_u[] = {
501 { NULL, pn_Cmp_False }, /* always false */
502 { "e", pn_Cmp_Eq }, /* == */
503 { "b", pn_Cmp_Lt }, /* < */
504 { "be", pn_Cmp_Le }, /* <= */
505 { "a", pn_Cmp_Gt }, /* > */
506 { "ae", pn_Cmp_Ge }, /* >= */
507 { "ne", pn_Cmp_Lg }, /* != */
508 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
509 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
510 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
511 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
512 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
513 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
514 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
515 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
516 { NULL, pn_Cmp_True }, /* always true */
520 * returns the condition code
522 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
524 assert(cmp2condition_s[cmp_code].num == cmp_code);
525 assert(cmp2condition_u[cmp_code].num == cmp_code);
527 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
531 * Returns the target block for a control flow node.
533 static ir_node *get_cfop_target_block(const ir_node *irn) {
534 return get_irn_link(irn);
538 * Returns the target label for a control flow node.
540 static char *get_cfop_target(const ir_node *irn, char *buf) {
541 ir_node *bl = get_cfop_target_block(irn);
543 snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
547 static int have_block_sched = 0;
548 /** Return the next block in Block schedule */
549 static ir_node *next_blk_sched(const ir_node *block) {
550 return have_block_sched ? get_irn_link(block) : NULL;
554 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
556 static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
557 const ir_node *proj1, *proj2 = NULL;
558 const ir_node *block, *next_bl = NULL;
559 const ir_edge_t *edge;
560 char buf[SNPRINTF_BUF_LEN];
561 char cmd_buf[SNPRINTF_BUF_LEN];
562 char cmnt_buf[SNPRINTF_BUF_LEN];
564 /* get both Proj's */
565 edge = get_irn_out_edge_first(irn);
566 proj1 = get_edge_src_irn(edge);
567 assert(is_Proj(proj1) && "CondJmp with a non-Proj");
569 edge = get_irn_out_edge_next(irn, edge);
571 proj2 = get_edge_src_irn(edge);
572 assert(is_Proj(proj2) && "CondJmp with a non-Proj");
575 /* for now, the code works for scheduled and non-schedules blocks */
576 block = get_nodes_block(irn);
578 /* we have a block schedule */
579 next_bl = next_blk_sched(block);
581 if (get_cfop_target_block(proj1) == next_bl) {
582 /* exchange both proj's so the second one can be omitted */
583 const ir_node *t = proj1;
589 /* the first Proj must always be created */
590 if (get_Proj_proj(proj1) == pn_Cond_true) {
591 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
592 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
593 get_cfop_target(proj1, buf));
594 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == TRUE */");
597 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
598 get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), mode),
599 !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
600 get_cfop_target(proj1, buf));
601 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == FALSE */");
605 /* the second Proj might be a fallthrough */
607 if (get_cfop_target_block(proj2) != next_bl) {
608 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj2, buf));
609 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
613 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrogh %s */", get_cfop_target(proj2, buf));
620 * Emits code for conditional jump.
622 static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
624 char cmd_buf[SNPRINTF_BUF_LEN];
625 char cmnt_buf[SNPRINTF_BUF_LEN];
627 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
628 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
630 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
634 * Emits code for conditional jump with two variables.
636 static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
637 CondJmp_emitter(irn, env);
641 * Emits code for conditional jump with immediate.
643 void emit_ia32_CondJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
644 CondJmp_emitter(irn, env);
648 * Emits code for conditional test and jump.
650 static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
652 const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
653 const char *op2 = get_ia32_cnst(irn);
654 char cmd_buf[SNPRINTF_BUF_LEN];
655 char cmnt_buf[SNPRINTF_BUF_LEN];
658 op2 = arch_register_get_name(get_in_reg(irn, 1));
660 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, get_ia32_cnst(irn) ? " " : " %", op2);
661 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
663 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
667 * Emits code for conditional test and jump with two variables.
669 static void emit_ia32_TestJmp(const ir_node *irn, ia32_emit_env_t *env) {
670 TestJmp_emitter(irn, env);
674 * Emits code for conditional test and jump with immediate.
676 static void emit_ia32_TestJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
677 TestJmp_emitter(irn, env);
680 /*********************************************************
683 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
684 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
685 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
686 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
689 *********************************************************/
691 /* jump table entry (target and corresponding number) */
692 typedef struct _branch_t {
697 /* jump table for switch generation */
698 typedef struct _jmp_tbl_t {
699 ir_node *defProj; /**< default target */
700 int min_value; /**< smallest switch case */
701 int max_value; /**< largest switch case */
702 int num_branches; /**< number of jumps */
703 char *label; /**< label of the jump table */
704 branch_t *branches; /**< jump array */
708 * Compare two variables of type branch_t. Used to sort all switch cases
710 static int ia32_cmp_branch_t(const void *a, const void *b) {
711 branch_t *b1 = (branch_t *)a;
712 branch_t *b2 = (branch_t *)b;
714 if (b1->value <= b2->value)
721 * Emits code for a SwitchJmp (creates a jump table if
722 * possible otherwise a cmp-jmp cascade). Port from
725 void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
726 unsigned long interval;
727 char buf[SNPRINTF_BUF_LEN];
728 int last_value, i, pn, do_jmp_tbl = 1;
731 const ir_edge_t *edge;
732 const lc_arg_env_t *env = ia32_get_arg_env();
733 FILE *F = emit_env->out;
734 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
736 /* fill the table structure */
737 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
738 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
740 tbl.num_branches = get_irn_n_edges(irn);
741 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
742 tbl.min_value = INT_MAX;
743 tbl.max_value = INT_MIN;
746 /* go over all proj's and collect them */
747 foreach_out_edge(irn, edge) {
748 proj = get_edge_src_irn(edge);
749 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
751 pn = get_Proj_proj(proj);
753 /* create branch entry */
754 tbl.branches[i].target = proj;
755 tbl.branches[i].value = pn;
757 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
758 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
760 /* check for default proj */
761 if (pn == get_ia32_pncode(irn)) {
762 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
769 /* sort the branches by their number */
770 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
772 /* two-complement's magic make this work without overflow */
773 interval = tbl.max_value - tbl.min_value;
775 /* check value interval */
776 if (interval > 16 * 1024) {
780 /* check ratio of value interval to number of branches */
781 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
787 if (tbl.min_value != 0) {
788 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, -%d(%1S)",
789 interval, tbl.min_value, irn);
790 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* first switch value is not 0 */");
795 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, %1S", interval, irn);
796 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* compare for switch */");
801 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
802 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default jump if out of range */");
805 if (tbl.num_branches > 1) {
808 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp [%1S*4+%s]", irn, tbl.label);
809 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* get jump table entry as target */");
812 fprintf(F, "\t.section\t.rodata\n");
813 fprintf(F, "\t.align 4\n");
815 fprintf(F, "%s:\n", tbl.label);
817 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
818 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */\n", tbl.branches[0].value);
821 last_value = tbl.branches[0].value;
822 for (i = 1; i < tbl.num_branches; ++i) {
823 while (++last_value < tbl.branches[i].value) {
824 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
825 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
828 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf), last_value);
829 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", last_value);
833 fprintf(F, "\t.text");
836 /* one jump is enough */
837 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
838 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* only one case given */");
842 else { // no jump table
843 for (i = 0; i < tbl.num_branches; ++i) {
844 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %d, %1S", tbl.branches[i].value, irn);
845 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", i);
847 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
850 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.defProj, buf));
851 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
862 * Emits code for a unconditional jump.
864 void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
865 ir_node *block, *next_bl;
867 char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
869 /* for now, the code works for scheduled and non-schedules blocks */
870 block = get_nodes_block(irn);
872 /* we have a block schedule */
873 next_bl = next_blk_sched(block);
874 if (get_cfop_target_block(irn) != next_bl) {
875 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
876 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F) */", irn, get_cfop_target_block(irn));
880 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(irn, buf));
885 /****************************
888 * _ __ _ __ ___ _ ___
889 * | '_ \| '__/ _ \| |/ __|
890 * | |_) | | | (_) | |\__ \
891 * | .__/|_| \___/| ||___/
894 ****************************/
897 * Emits code for a proj -> node
899 void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
900 ir_node *pred = get_Proj_pred(irn);
902 if (get_irn_op(pred) == op_Start) {
903 switch(get_Proj_proj(irn)) {
904 case pn_Start_X_initial_exec:
913 /**********************************
916 * | | ___ _ __ _ _| |_) |
917 * | | / _ \| '_ \| | | | _ <
918 * | |___| (_) | |_) | |_| | |_) |
919 * \_____\___/| .__/ \__, |____/
922 **********************************/
925 * Emit movsb/w instructions to make mov count divideable by 4
927 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
928 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
930 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
932 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
933 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
938 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
939 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 1 */");
942 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
943 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 2 */");
946 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
947 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
949 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
950 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
958 * Emit rep movsd instruction for memcopy.
960 void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
961 FILE *F = emit_env->out;
962 tarval *tv = get_ia32_Immop_tarval(irn);
963 int rem = get_tarval_long(tv);
964 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
965 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
967 emit_CopyB_prolog(F, rem, size);
969 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
970 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy */");
975 * Emits unrolled memcopy.
977 void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
978 tarval *tv = get_ia32_Immop_tarval(irn);
979 int size = get_tarval_long(tv);
980 FILE *F = emit_env->out;
981 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
983 emit_CopyB_prolog(F, size & 0x3, size);
987 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
988 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy unrolled */");
995 /***************************
999 * | | / _ \| '_ \ \ / /
1000 * | |___| (_) | | | \ V /
1001 * \_____\___/|_| |_|\_/
1003 ***************************/
1006 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
1008 static void emit_ia32_Conv(const ir_node *irn, ia32_emit_env_t *emit_env) {
1009 FILE *F = emit_env->out;
1010 const lc_arg_env_t *env = ia32_get_arg_env();
1011 char *from, *to, buf[64];
1012 ir_mode *src_mode, *tgt_mode;
1013 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1015 src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
1016 tgt_mode = get_ia32_res_mode(irn);
1018 from = mode_is_float(src_mode) ? (get_mode_size_bits(src_mode) == 32 ? "ss" : "sd") : "si";
1019 to = mode_is_float(tgt_mode) ? (get_mode_size_bits(tgt_mode) == 32 ? "ss" : "sd") : "si";
1021 switch(get_ia32_op_type(irn)) {
1023 lc_esnprintf(env, buf, sizeof(buf), "%1D, %3S", irn, irn);
1025 case ia32_AddrModeS:
1026 lc_esnprintf(env, buf, sizeof(buf), "%1D, %s", irn, ia32_emit_am(irn, emit_env));
1029 assert(0 && "unsupported op type for Conv");
1032 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cvt%s2%s %s", from, to, buf);
1033 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F, %+F) */", irn, src_mode, tgt_mode);
1037 void emit_ia32_Conv_I2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1038 emit_ia32_Conv(irn, emit_env);
1041 void emit_ia32_Conv_FP2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1042 emit_ia32_Conv(irn, emit_env);
1045 void emit_ia32_Conv_FP2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1046 emit_ia32_Conv(irn, emit_env);
1051 /*******************************************
1054 * | |__ ___ _ __ ___ __| | ___ ___
1055 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
1056 * | |_) | __/ | | | (_) | (_| | __/\__ \
1057 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
1059 *******************************************/
1062 * Emits a backend call
1064 void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
1065 FILE *F = emit_env->out;
1066 entity *ent = be_Call_get_entity(irn);
1067 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1070 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "call %s", get_entity_name(ent));
1073 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "%1D", get_irn_n(irn, be_pos_Call_ptr));
1076 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (be_Call) */", irn);
1082 * Emits code to increase stack pointer.
1084 void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1085 FILE *F = emit_env->out;
1086 unsigned offs = be_get_IncSP_offset(irn);
1087 be_stack_dir_t dir = be_get_IncSP_direction(irn);
1088 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1091 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S,%s%u", irn,
1092 (dir == be_stack_dir_along) ? " -" : " ", offs);
1093 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (IncSP) */", irn);
1096 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1097 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* omitted %+F (IncSP) with 0 */", irn);
1104 * Emits code to set stack pointer.
1106 void emit_be_SetSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1107 FILE *F = emit_env->out;
1108 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1110 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
1111 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (restore SP) */", irn);
1116 * Emits code for Copy.
1118 void emit_be_Copy(const ir_node *irn, ia32_emit_env_t *emit_env) {
1119 FILE *F = emit_env->out;
1120 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1122 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %1S", irn, irn);
1123 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
1128 * Emits code for exchange.
1130 void emit_be_Perm(const ir_node *irn, ia32_emit_env_t *emit_env) {
1131 FILE *F = emit_env->out;
1132 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1134 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "xchg %1S, %2S", irn, irn);
1135 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%1A, %2A) */", irn, irn, irn);
1139 /***********************************************************************************
1142 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
1143 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
1144 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
1145 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
1147 ***********************************************************************************/
1150 * Enters the emitter functions for handled nodes into the generic
1151 * pointer of an opcode.
1153 static void ia32_register_emitters(void) {
1155 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
1156 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
1157 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
1159 /* first clear the generic function pointer for all ops */
1160 clear_irp_opcodes_generic_func();
1162 /* register all emitter functions defined in spec */
1163 ia32_register_spec_emitters();
1165 /* other ia32 emitter functions */
1168 IA32_EMIT(SwitchJmp);
1171 IA32_EMIT(Conv_I2FP);
1172 IA32_EMIT(Conv_FP2I);
1173 IA32_EMIT(Conv_FP2FP);
1175 /* benode emitter */
1192 * Emits code for a node.
1194 static void ia32_emit_node(const ir_node *irn, void *env) {
1195 ia32_emit_env_t *emit_env = env;
1196 firm_dbg_module_t *mod = emit_env->mod;
1197 FILE *F = emit_env->out;
1198 ir_op *op = get_irn_op(irn);
1200 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
1202 if (op->ops.generic) {
1203 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
1207 ir_fprintf(F, "\t%35s /* %+F */\n", " ", irn);
1212 * Walks over the nodes in a block connected by scheduling edges
1213 * and emits code for each node.
1215 static void ia32_gen_block(ir_node *block, void *env) {
1218 fprintf(((ia32_emit_env_t *)env)->out, BLOCK_PREFIX("%ld:\n"), get_irn_node_nr(block));
1219 sched_foreach(block, irn) {
1220 ia32_emit_node(irn, env);
1225 * Emits code for function start.
1227 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
1228 entity *irg_ent = get_irg_entity(irg);
1229 const char *irg_name = get_entity_name(irg_ent);
1231 fprintf(F, "\t.text\n");
1232 if (get_entity_visibility(irg_ent) == visibility_external_visible) {
1233 fprintf(F, ".globl %s\n", irg_name);
1235 fprintf(F, "\t.type\t%s, @function\n", irg_name);
1236 fprintf(F, "%s:\n", irg_name);
1240 * Emits code for function end
1242 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
1243 const char *irg_name = get_entity_name(get_irg_entity(irg));
1245 fprintf(F, "\tret\n");
1246 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
1251 * Sets labels for control flow nodes (jump target)
1252 * TODO: Jump optimization
1254 static void ia32_gen_labels(ir_node *block, void *env) {
1256 int n = get_Block_n_cfgpreds(block);
1258 for (n--; n >= 0; n--) {
1259 pred = get_Block_cfgpred(block, n);
1260 set_irn_link(pred, block);
1270 * Ext-Block walker: create a block schedule
1272 static void create_block_list(ir_extblk *blk, void *env) {
1276 for (i = 0, n = get_extbb_n_blocks(blk); i < n; ++i) {
1277 ir_node *block = get_extbb_block(blk, i);
1279 set_irn_link(block, NULL);
1281 set_irn_link(list->end, block);
1283 list->start = block;
1290 * Main driver. Emits the code for one routine.
1292 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
1293 ia32_emit_env_t emit_env;
1297 emit_env.mod = firm_dbg_register("ir.be.codegen.ia32");
1299 emit_env.arch_env = cg->arch_env;
1301 emit_env.isa = (ia32_isa_t *)cg->arch_env->isa;
1303 /* set the global arch_env (needed by print hooks) */
1304 arch_env = cg->arch_env;
1306 ia32_register_emitters();
1308 ia32_emit_func_prolog(F, irg);
1309 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
1312 have_block_sched = 0;
1313 irg_block_walk_graph(irg, NULL, ia32_gen_block, &emit_env);
1319 irg_extblock_walk_graph(irg, NULL, create_block_list, &list);
1321 have_block_sched = 1;
1322 for (block = list.start; block; block = get_irn_link(block))
1323 ia32_gen_block(block, &emit_env);
1326 ia32_emit_func_epilog(F, irg);