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 "gen_ia32_regalloc_if.h"
30 #include "ia32_nodes_attr.h"
31 #include "ia32_new_nodes.h"
32 #include "ia32_map_regs.h"
34 #ifdef obstack_chunk_alloc
35 # undef obstack_chunk_alloc
36 # define obstack_chunk_alloc xmalloc
38 # define obstack_chunk_alloc xmalloc
39 # define obstack_chunk_free free
42 #define BLOCK_PREFIX(x) ".L" x
44 extern int obstack_printf(struct obstack *obst, char *fmt, ...);
46 #define SNPRINTF_BUF_LEN 128
48 /* global arch_env for lc_printf functions */
49 static const arch_env_t *arch_env = NULL;
51 /* indicates whether blocks are scheduled or not
52 (this variable is set automatically) */
53 static int have_block_sched = 0;
55 /*************************************************************
57 * (_) | | / _| | | | |
58 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
59 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
60 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
61 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
64 *************************************************************/
66 /* We always pass the ir_node which is a pointer. */
67 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
68 return lc_arg_type_ptr;
73 * Returns the register at in position pos.
75 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
77 const arch_register_t *reg = NULL;
79 assert(get_irn_arity(irn) > pos && "Invalid IN position");
81 /* The out register of the operator at position pos is the
82 in register we need. */
83 op = get_irn_n(irn, pos);
85 reg = arch_get_irn_register(arch_env, op);
87 assert(reg && "no in register found");
92 * Returns the register at out position pos.
94 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
96 const arch_register_t *reg = NULL;
98 /* 1st case: irn is not of mode_T, so it has only */
99 /* one OUT register -> good */
100 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
101 /* Proj with the corresponding projnum for the register */
103 if (get_irn_mode(irn) != mode_T) {
104 reg = arch_get_irn_register(arch_env, irn);
106 else if (is_ia32_irn(irn)) {
107 reg = get_ia32_out_reg(irn, pos);
110 const ir_edge_t *edge;
112 foreach_out_edge(irn, edge) {
113 proj = get_edge_src_irn(edge);
114 assert(is_Proj(proj) && "non-Proj from mode_T node");
115 if (get_Proj_proj(proj) == pos) {
116 reg = arch_get_irn_register(arch_env, proj);
122 assert(reg && "no out register found");
132 * Returns the name of the in register at position pos.
134 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
135 const arch_register_t *reg;
137 static char *buf = NULL;
140 if (in_out == IN_REG) {
141 reg = get_in_reg(irn, pos);
144 /* destination address mode nodes don't have outputs */
145 if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
149 reg = get_out_reg(irn, pos);
152 name = arch_register_get_name(reg);
158 len = strlen(name) + 2;
159 buf = xcalloc(1, len);
161 snprintf(buf, len, "%%%s", name);
167 * Get the register name for a node.
169 static int ia32_get_reg_name(lc_appendable_t *app,
170 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
173 ir_node *X = arg->v_ptr;
174 int nr = occ->width - 1;
177 return lc_appendable_snadd(app, "(null)", 6);
179 buf = get_ia32_reg_name(X, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
181 return lc_appendable_snadd(app, buf, strlen(buf));
185 * Returns the tarval, offset or scale of an ia32 as a string.
187 static int ia32_const_to_str(lc_appendable_t *app,
188 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
191 ir_node *X = arg->v_ptr;
194 return lc_arg_append(app, occ, "(null)", 6);
196 if (occ->conversion == 'C') {
197 buf = get_ia32_cnst(X);
200 buf = get_ia32_am_offs(X);
203 return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
207 * Determines the SSE suffix depending on the mode.
209 static int ia32_get_mode_suffix(lc_appendable_t *app,
210 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
212 ir_node *X = arg->v_ptr;
213 ir_mode *mode = get_irn_mode(X);
215 if (mode == mode_T) {
216 mode = is_ia32_AddrModeS(X) || is_ia32_AddrModeD(X) ? get_ia32_ls_mode(X) : get_ia32_res_mode(X);
220 return lc_arg_append(app, occ, "(null)", 6);
222 if (mode_is_float(mode)) {
223 return lc_appendable_chadd(app, get_mode_size_bits(mode) == 32 ? 's' : 'd');
226 return lc_appendable_chadd(app, mode_is_signed(mode) ? 's' : 'z');
231 * Return the ia32 printf arg environment.
232 * We use the firm environment with some additional handlers.
234 const lc_arg_env_t *ia32_get_arg_env(void) {
235 static lc_arg_env_t *env = NULL;
237 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
238 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
239 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
242 /* extend the firm printer */
243 env = firm_get_arg_env();
245 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
246 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
247 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
248 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
249 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
255 static char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
256 switch(get_mode_size_bits(mode)) {
258 return ia32_get_mapped_reg_name(env->isa->regs_8bit, reg);
260 return ia32_get_mapped_reg_name(env->isa->regs_16bit, reg);
262 return (char *)arch_register_get_name(reg);
267 * Emits registers and/or address mode of a binary operation.
269 char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
270 static char *buf = NULL;
272 /* verify that this function is never called on non-AM supporting operations */
273 //assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
275 #define PRODUCES_RESULT(n) \
276 (!(is_ia32_St(n) || \
277 is_ia32_Store8Bit(n) || \
278 is_ia32_CondJmp(n) || \
279 is_ia32_fCondJmp(n) || \
280 is_ia32_SwitchJmp(n)))
283 buf = xcalloc(1, SNPRINTF_BUF_LEN);
286 memset(buf, 0, SNPRINTF_BUF_LEN);
289 switch(get_ia32_op_type(n)) {
291 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
292 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
295 const arch_register_t *in1 = get_in_reg(n, 2);
296 const arch_register_t *in2 = get_in_reg(n, 3);
297 const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
298 const arch_register_t *in;
300 in = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
301 out = out ? out : in1;
303 snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", \
304 arch_register_get_name(out), arch_register_get_name(in));
308 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
309 assert(! PRODUCES_RESULT(n) && "Source AM with Const must not produce result");
310 snprintf(buf, SNPRINTF_BUF_LEN, "%s, %s", get_ia32_cnst(n), ia32_emit_am(n, env));
313 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n, env));
317 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
318 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
319 ia32_emit_am(n, env),
320 is_ia32_ImmSymConst(n) ? " OFFSET FLAT:" : " ", /* In case of a symconst we must add OFFSET to */
321 get_ia32_cnst(n)); /* tell the assembler to store it's address. */
324 const arch_register_t *in1 = get_in_reg(n, 2);
325 ir_mode *mode = get_ia32_res_mode(n);
327 mode = mode ? mode : get_ia32_ls_mode(n);
328 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %%%s",
329 ia32_emit_am(n, env), ia32_get_reg_name_for_mode(env, mode, in1));
333 assert(0 && "unsupported op type");
336 #undef PRODUCES_RESULT
342 * Emits registers and/or address mode of a unary operation.
344 char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
345 static char *buf = NULL;
348 buf = xcalloc(1, SNPRINTF_BUF_LEN);
351 memset(buf, 0, SNPRINTF_BUF_LEN);
354 switch(get_ia32_op_type(n)) {
356 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
359 snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n, env));
362 assert(0 && "unsupported op type");
369 * Emits address mode.
371 char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
372 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
376 static struct obstack *obst = NULL;
377 ir_mode *mode = get_ia32_ls_mode(n);
379 if (! is_ia32_Lea(n))
380 assert(mode && "AM node must have ls_mode attribute set.");
383 obst = xcalloc(1, sizeof(*obst));
386 obstack_free(obst, NULL);
389 /* obstack_free with NULL results in an uninitialized obstack */
393 switch (get_mode_size_bits(mode)) {
395 obstack_printf(obst, "BYTE PTR ");
398 obstack_printf(obst, "WORD PTR ");
401 obstack_printf(obst, "DWORD PTR ");
408 obstack_printf(obst, "[");
410 if (am_flav & ia32_B) {
411 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
415 if (am_flav & ia32_I) {
417 obstack_printf(obst, "+");
420 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
422 if (am_flav & ia32_S) {
423 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
429 if (am_flav & ia32_O) {
430 s = get_ia32_am_offs(n);
432 /* omit exlicit + if there was no base or index */
433 if (! had_output && s[0] == '+')
436 obstack_printf(obst, s);
439 obstack_printf(obst, "] ");
441 size = obstack_object_size(obst);
442 s = obstack_finish(obst);
451 * Formated print of commands and comments.
453 static void ia32_fprintf_format(FILE *F, const ir_node *irn, char *cmd_buf, char *cmnt_buf) {
455 const char *name = irn ? be_retrieve_dbg_info(get_irn_dbg_info((ir_node *)irn), &lineno) : NULL;
458 fprintf(F, "\t%-35s %-60s /* %s:%u */\n", cmd_buf, cmnt_buf, name, lineno);
460 fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
466 * Add a number to a prefix. This number will not be used a second time.
468 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
469 static unsigned long id = 0;
470 snprintf(buf, buflen, "%s%lu", prefix, ++id);
476 /*************************************************
479 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
480 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
481 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
482 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
484 *************************************************/
487 #define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
490 * coding of conditions
492 struct cmp2conditon_t {
498 * positive conditions for signed compares
500 static const struct cmp2conditon_t cmp2condition_s[] = {
501 { NULL, pn_Cmp_False }, /* always false */
502 { "e", pn_Cmp_Eq }, /* == */
503 { "l", pn_Cmp_Lt }, /* < */
504 { "le", pn_Cmp_Le }, /* <= */
505 { "g", pn_Cmp_Gt }, /* > */
506 { "ge", 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 * positive conditions for unsigned compares
522 static const struct cmp2conditon_t cmp2condition_u[] = {
523 { NULL, pn_Cmp_False }, /* always false */
524 { "e", pn_Cmp_Eq }, /* == */
525 { "b", pn_Cmp_Lt }, /* < */
526 { "be", pn_Cmp_Le }, /* <= */
527 { "a", pn_Cmp_Gt }, /* > */
528 { "ae", pn_Cmp_Ge }, /* >= */
529 { "ne", pn_Cmp_Lg }, /* != */
530 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
531 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
532 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
533 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
534 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
535 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
536 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
537 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
538 { NULL, pn_Cmp_True }, /* always true */
542 * returns the condition code
544 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
546 assert(cmp2condition_s[cmp_code].num == cmp_code);
547 assert(cmp2condition_u[cmp_code].num == cmp_code);
549 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
553 * Returns the target block for a control flow node.
555 static ir_node *get_cfop_target_block(const ir_node *irn) {
556 return get_irn_link(irn);
560 * Returns the target label for a control flow node.
562 static char *get_cfop_target(const ir_node *irn, char *buf) {
563 ir_node *bl = get_cfop_target_block(irn);
565 snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
569 /** Return the next block in Block schedule */
570 static ir_node *next_blk_sched(const ir_node *block) {
571 return have_block_sched ? get_irn_link(block) : NULL;
575 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
577 static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
578 const ir_node *proj1, *proj2 = NULL;
579 const ir_node *block, *next_bl = NULL;
580 const ir_edge_t *edge;
581 char buf[SNPRINTF_BUF_LEN];
582 char cmd_buf[SNPRINTF_BUF_LEN];
583 char cmnt_buf[SNPRINTF_BUF_LEN];
585 /* get both Proj's */
586 edge = get_irn_out_edge_first(irn);
587 proj1 = get_edge_src_irn(edge);
588 assert(is_Proj(proj1) && "CondJmp with a non-Proj");
590 edge = get_irn_out_edge_next(irn, edge);
592 proj2 = get_edge_src_irn(edge);
593 assert(is_Proj(proj2) && "CondJmp with a non-Proj");
596 /* for now, the code works for scheduled and non-schedules blocks */
597 block = get_nodes_block(irn);
599 /* we have a block schedule */
600 next_bl = next_blk_sched(block);
602 if (get_cfop_target_block(proj1) == next_bl) {
603 /* exchange both proj's so the second one can be omitted */
604 const ir_node *t = proj1;
610 /* the first Proj must always be created */
611 if (get_Proj_proj(proj1) == pn_Cond_true) {
612 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
613 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
614 get_cfop_target(proj1, buf));
615 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == TRUE */");
618 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
619 get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), mode),
620 !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
621 get_cfop_target(proj1, buf));
622 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == FALSE */");
626 /* the second Proj might be a fallthrough */
628 if (get_cfop_target_block(proj2) != next_bl) {
629 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj2, buf));
630 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
634 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrogh %s */", get_cfop_target(proj2, buf));
641 * Emits code for conditional jump.
643 static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
645 char cmd_buf[SNPRINTF_BUF_LEN];
646 char cmnt_buf[SNPRINTF_BUF_LEN];
648 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
649 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
651 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
655 * Emits code for conditional jump with two variables.
657 static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
658 CondJmp_emitter(irn, env);
662 * Emits code for conditional jump with immediate.
664 void emit_ia32_CondJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
665 CondJmp_emitter(irn, env);
669 * Emits code for conditional test and jump.
671 static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
673 #define IA32_IS_IMMOP (is_ia32_ImmConst(irn) || is_ia32_ImmSymConst(irn))
676 const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
677 const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
678 char cmd_buf[SNPRINTF_BUF_LEN];
679 char cmnt_buf[SNPRINTF_BUF_LEN];
682 op2 = arch_register_get_name(get_in_reg(irn, 1));
684 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
685 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
688 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
694 * Emits code for conditional test and jump with two variables.
696 static void emit_ia32_TestJmp(const ir_node *irn, ia32_emit_env_t *env) {
697 TestJmp_emitter(irn, env);
700 static void emit_ia32_CJmp(const ir_node *irn, ia32_emit_env_t *env) {
702 char cmd_buf[SNPRINTF_BUF_LEN];
703 char cmnt_buf[SNPRINTF_BUF_LEN];
705 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
706 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
708 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
711 static void emit_ia32_CJmpAM(const ir_node *irn, ia32_emit_env_t *env) {
713 char cmd_buf[SNPRINTF_BUF_LEN];
714 char cmnt_buf[SNPRINTF_BUF_LEN];
716 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
717 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
719 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
722 /*********************************************************
725 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
726 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
727 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
728 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
731 *********************************************************/
733 /* jump table entry (target and corresponding number) */
734 typedef struct _branch_t {
739 /* jump table for switch generation */
740 typedef struct _jmp_tbl_t {
741 ir_node *defProj; /**< default target */
742 int min_value; /**< smallest switch case */
743 int max_value; /**< largest switch case */
744 int num_branches; /**< number of jumps */
745 char *label; /**< label of the jump table */
746 branch_t *branches; /**< jump array */
750 * Compare two variables of type branch_t. Used to sort all switch cases
752 static int ia32_cmp_branch_t(const void *a, const void *b) {
753 branch_t *b1 = (branch_t *)a;
754 branch_t *b2 = (branch_t *)b;
756 if (b1->value <= b2->value)
763 * Emits code for a SwitchJmp (creates a jump table if
764 * possible otherwise a cmp-jmp cascade). Port from
767 void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
768 unsigned long interval;
769 char buf[SNPRINTF_BUF_LEN];
770 int last_value, i, pn, do_jmp_tbl = 1;
773 const ir_edge_t *edge;
774 const lc_arg_env_t *env = ia32_get_arg_env();
775 FILE *F = emit_env->out;
776 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
778 /* fill the table structure */
779 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
780 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
782 tbl.num_branches = get_irn_n_edges(irn);
783 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
784 tbl.min_value = INT_MAX;
785 tbl.max_value = INT_MIN;
788 /* go over all proj's and collect them */
789 foreach_out_edge(irn, edge) {
790 proj = get_edge_src_irn(edge);
791 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
793 pn = get_Proj_proj(proj);
795 /* create branch entry */
796 tbl.branches[i].target = proj;
797 tbl.branches[i].value = pn;
799 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
800 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
802 /* check for default proj */
803 if (pn == get_ia32_pncode(irn)) {
804 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
811 /* sort the branches by their number */
812 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
814 /* two-complement's magic make this work without overflow */
815 interval = tbl.max_value - tbl.min_value;
817 /* check value interval */
818 if (interval > 16 * 1024) {
822 /* check ratio of value interval to number of branches */
823 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
829 if (tbl.min_value != 0) {
830 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, -%d(%1S)",
831 interval, tbl.min_value, irn);
832 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* first switch value is not 0 */");
837 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, %1S", interval, irn);
838 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* compare for switch */");
843 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
844 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default jump if out of range */");
847 if (tbl.num_branches > 1) {
850 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp [%1S*4+%s]", irn, tbl.label);
851 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* get jump table entry as target */");
854 fprintf(F, "\t.section\t.rodata\n");
855 fprintf(F, "\t.align 4\n");
857 fprintf(F, "%s:\n", tbl.label);
859 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
860 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */\n", tbl.branches[0].value);
863 last_value = tbl.branches[0].value;
864 for (i = 1; i < tbl.num_branches; ++i) {
865 while (++last_value < tbl.branches[i].value) {
866 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
867 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
870 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf));
871 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", last_value);
875 fprintf(F, "\t.text");
878 /* one jump is enough */
879 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
880 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* only one case given */");
884 else { // no jump table
885 for (i = 0; i < tbl.num_branches; ++i) {
886 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %d, %1S", tbl.branches[i].value, irn);
887 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", i);
889 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
892 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.defProj, buf));
893 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
904 * Emits code for a unconditional jump.
906 void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
907 ir_node *block, *next_bl;
909 char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
911 /* for now, the code works for scheduled and non-schedules blocks */
912 block = get_nodes_block(irn);
914 /* we have a block schedule */
915 next_bl = next_blk_sched(block);
916 if (get_cfop_target_block(irn) != next_bl) {
917 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
918 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F) */", irn, get_cfop_target_block(irn));
922 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(irn, buf));
927 /****************************
930 * _ __ _ __ ___ _ ___
931 * | '_ \| '__/ _ \| |/ __|
932 * | |_) | | | (_) | |\__ \
933 * | .__/|_| \___/| ||___/
936 ****************************/
939 * Emits code for a proj -> node
941 void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
942 ir_node *pred = get_Proj_pred(irn);
944 if (get_irn_op(pred) == op_Start) {
945 switch(get_Proj_proj(irn)) {
946 case pn_Start_X_initial_exec:
955 /**********************************
958 * | | ___ _ __ _ _| |_) |
959 * | | / _ \| '_ \| | | | _ <
960 * | |___| (_) | |_) | |_| | |_) |
961 * \_____\___/| .__/ \__, |____/
964 **********************************/
967 * Emit movsb/w instructions to make mov count divideable by 4
969 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
970 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
972 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
974 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
975 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
980 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
981 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 1 */");
984 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
985 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 2 */");
988 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
989 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
991 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
992 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
1000 * Emit rep movsd instruction for memcopy.
1002 void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
1003 FILE *F = emit_env->out;
1004 tarval *tv = get_ia32_Immop_tarval(irn);
1005 int rem = get_tarval_long(tv);
1006 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
1007 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1009 emit_CopyB_prolog(F, rem, size);
1011 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
1012 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy */");
1017 * Emits unrolled memcopy.
1019 void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
1020 tarval *tv = get_ia32_Immop_tarval(irn);
1021 int size = get_tarval_long(tv);
1022 FILE *F = emit_env->out;
1023 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1025 emit_CopyB_prolog(F, size & 0x3, size);
1029 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
1030 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy unrolled */");
1037 /***************************
1041 * | | / _ \| '_ \ \ / /
1042 * | |___| (_) | | | \ V /
1043 * \_____\___/|_| |_|\_/
1045 ***************************/
1048 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
1050 static void emit_ia32_Conv_with_FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1051 FILE *F = emit_env->out;
1052 const lc_arg_env_t *env = ia32_get_arg_env();
1053 char *from, *to, buf[64];
1054 ir_mode *src_mode, *tgt_mode;
1055 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1057 src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
1058 tgt_mode = get_ia32_res_mode(irn);
1060 from = mode_is_float(src_mode) ? (get_mode_size_bits(src_mode) == 32 ? "ss" : "sd") : "si";
1061 to = mode_is_float(tgt_mode) ? (get_mode_size_bits(tgt_mode) == 32 ? "ss" : "sd") : "si";
1063 switch(get_ia32_op_type(irn)) {
1065 lc_esnprintf(env, buf, sizeof(buf), "%1D, %3S", irn, irn);
1067 case ia32_AddrModeS:
1068 lc_esnprintf(env, buf, sizeof(buf), "%1D, %s", irn, ia32_emit_am(irn, emit_env));
1071 assert(0 && "unsupported op type for Conv");
1074 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cvt%s2%s %s", from, to, buf);
1075 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F, %+F) */", irn, src_mode, tgt_mode);
1079 void emit_ia32_Conv_I2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1080 emit_ia32_Conv_with_FP(irn, emit_env);
1083 void emit_ia32_Conv_FP2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1084 emit_ia32_Conv_with_FP(irn, emit_env);
1087 void emit_ia32_Conv_FP2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1088 emit_ia32_Conv_with_FP(irn, emit_env);
1092 * Emits code for an Int conversion.
1094 void emit_ia32_Conv_I2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1095 FILE *F = emit_env->out;
1096 const lc_arg_env_t *env = ia32_get_arg_env();
1097 char *move_cmd, *conv_cmd;
1098 ir_mode *src_mode, *tgt_mode;
1100 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1101 const arch_register_t *in_reg, *out_reg;
1103 src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
1104 tgt_mode = get_ia32_res_mode(irn);
1106 n = get_mode_size_bits(src_mode);
1107 m = get_mode_size_bits(tgt_mode);
1109 if (mode_is_signed(n < m ? src_mode : tgt_mode)) {
1111 if (n == 8 || m == 8)
1113 else if (n == 16 || m == 16)
1116 assert(0 && "unsupported Conv_I2I");
1123 switch(get_ia32_op_type(irn)) {
1125 in_reg = get_in_reg(irn, 2);
1126 out_reg = get_out_reg(irn, 0);
1128 if (REGS_ARE_EQUAL(in_reg, &ia32_gp_regs[REG_EAX]) &&
1129 REGS_ARE_EQUAL(out_reg, in_reg) &&
1130 mode_is_signed(n < m ? src_mode : tgt_mode))
1132 /* argument and result are both in EAX and */
1133 /* signedness is ok: -> use converts */
1134 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s", conv_cmd);
1136 else if (REGS_ARE_EQUAL(out_reg, in_reg) &&
1137 ! mode_is_signed(n < m ? src_mode : tgt_mode))
1139 /* argument and result are in the same register */
1140 /* and signedness is ok: -> use and with mask */
1141 int mask = (1 << (n < m ? n : m)) - 1;
1142 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "and %1D, 0x%x", irn, mask);
1145 /* use move w/o sign extension */
1146 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %%%s",
1147 move_cmd, irn, ia32_get_reg_name_for_mode(emit_env, n < m ? src_mode : tgt_mode, in_reg));
1151 case ia32_AddrModeS:
1152 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %s",
1153 move_cmd, irn, ia32_emit_am(irn, emit_env));
1156 assert(0 && "unsupported op type for Conv");
1159 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%d Bit mode_%F -> %d Bit mode_%F) */",
1160 irn, n, src_mode, m, tgt_mode);
1165 /*******************************************
1168 * | |__ ___ _ __ ___ __| | ___ ___
1169 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
1170 * | |_) | __/ | | | (_) | (_| | __/\__ \
1171 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
1173 *******************************************/
1176 * Emits a backend call
1178 void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
1179 FILE *F = emit_env->out;
1180 entity *ent = be_Call_get_entity(irn);
1181 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1184 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "call %s", get_entity_name(ent));
1187 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "%1D", get_irn_n(irn, be_pos_Call_ptr));
1190 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (be_Call) */", irn);
1196 * Emits code to increase stack pointer.
1198 void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1199 FILE *F = emit_env->out;
1200 unsigned offs = be_get_IncSP_offset(irn);
1201 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1204 be_stack_dir_t dir = be_get_IncSP_direction(irn);
1205 if (dir == be_stack_dir_expand)
1206 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "sub %1S, %u", irn, offs);
1208 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S, %u", irn, offs);
1209 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (IncSP) */", irn);
1212 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1213 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* omitted %+F (IncSP) with 0 */", irn);
1220 * Emits code to set stack pointer.
1222 void emit_be_SetSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1223 FILE *F = emit_env->out;
1224 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1226 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
1227 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (restore SP) */", irn);
1232 * Emits code for Copy.
1234 void emit_be_Copy(const ir_node *irn, ia32_emit_env_t *emit_env) {
1235 FILE *F = emit_env->out;
1236 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1238 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %1S", irn, irn);
1239 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
1244 * Emits code for exchange.
1246 void emit_be_Perm(const ir_node *irn, ia32_emit_env_t *emit_env) {
1247 FILE *F = emit_env->out;
1248 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1250 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "xchg %1S, %2S", irn, irn);
1251 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%1A, %2A) */", irn, irn, irn);
1255 /***********************************************************************************
1258 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
1259 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
1260 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
1261 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
1263 ***********************************************************************************/
1266 * Enters the emitter functions for handled nodes into the generic
1267 * pointer of an opcode.
1269 static void ia32_register_emitters(void) {
1271 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
1272 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
1273 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
1275 /* first clear the generic function pointer for all ops */
1276 clear_irp_opcodes_generic_func();
1278 /* register all emitter functions defined in spec */
1279 ia32_register_spec_emitters();
1281 /* other ia32 emitter functions */
1286 IA32_EMIT(SwitchJmp);
1289 IA32_EMIT(Conv_I2FP);
1290 IA32_EMIT(Conv_FP2I);
1291 IA32_EMIT(Conv_FP2FP);
1292 IA32_EMIT(Conv_I2I);
1294 /* benode emitter */
1311 * Emits code for a node.
1313 static void ia32_emit_node(const ir_node *irn, void *env) {
1314 ia32_emit_env_t *emit_env = env;
1315 firm_dbg_module_t *mod = emit_env->mod;
1316 FILE *F = emit_env->out;
1317 ir_op *op = get_irn_op(irn);
1319 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
1321 if (op->ops.generic) {
1322 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
1326 ir_fprintf(F, "\t%35s /* %+F */\n", " ", irn);
1331 * Walks over the nodes in a block connected by scheduling edges
1332 * and emits code for each node.
1334 static void ia32_gen_block(ir_node *block, void *env) {
1337 if (! is_Block(block))
1340 fprintf(((ia32_emit_env_t *)env)->out, BLOCK_PREFIX("%ld:\n"), get_irn_node_nr(block));
1341 sched_foreach(block, irn) {
1342 ia32_emit_node(irn, env);
1347 * Emits code for function start.
1349 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
1350 entity *irg_ent = get_irg_entity(irg);
1351 const char *irg_name = get_entity_name(irg_ent);
1353 fprintf(F, "\t.text\n");
1354 if (get_entity_visibility(irg_ent) == visibility_external_visible) {
1355 fprintf(F, ".globl %s\n", irg_name);
1357 fprintf(F, "\t.type\t%s, @function\n", irg_name);
1358 fprintf(F, "%s:\n", irg_name);
1362 * Emits code for function end
1364 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
1365 const char *irg_name = get_entity_name(get_irg_entity(irg));
1367 fprintf(F, "\tret\n");
1368 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
1373 * Sets labels for control flow nodes (jump target)
1374 * TODO: Jump optimization
1376 static void ia32_gen_labels(ir_node *block, void *env) {
1378 int n = get_Block_n_cfgpreds(block);
1380 for (n--; n >= 0; n--) {
1381 pred = get_Block_cfgpred(block, n);
1382 set_irn_link(pred, block);
1392 * Ext-Block walker: create a block schedule
1394 static void create_block_list(ir_extblk *blk, void *env) {
1398 for (i = 0, n = get_extbb_n_blocks(blk); i < n; ++i) {
1399 ir_node *block = get_extbb_block(blk, i);
1401 set_irn_link(block, NULL);
1403 set_irn_link(list->end, block);
1405 list->start = block;
1412 * Main driver. Emits the code for one routine.
1414 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
1415 ia32_emit_env_t emit_env;
1419 emit_env.mod = firm_dbg_register("firm.be.ia32.emitter");
1421 emit_env.arch_env = cg->arch_env;
1423 emit_env.isa = (ia32_isa_t *)cg->arch_env->isa;
1425 /* set the global arch_env (needed by print hooks) */
1426 arch_env = cg->arch_env;
1428 ia32_register_emitters();
1430 ia32_emit_func_prolog(F, irg);
1431 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
1433 if (cg->opt.extbb) {
1434 /* schedule extended basic blocks */
1440 irg_extblock_walk_graph(irg, NULL, create_block_list, &list);
1442 have_block_sched = 1;
1443 for (block = list.start; block; block = get_irn_link(block))
1444 ia32_gen_block(block, &emit_env);
1447 /* "normal" block schedule */
1449 have_block_sched = 0;
1450 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
1453 ia32_emit_func_epilog(F, irg);