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);
264 assert(0 && "unsupported mode size");
270 * Emits registers and/or address mode of a binary operation.
272 char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
273 static char *buf = NULL;
275 /* verify that this function is never called on non-AM supporting operations */
276 //assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
278 #define PRODUCES_RESULT(n) \
279 (!(is_ia32_St(n) || \
280 is_ia32_Store8Bit(n) || \
281 is_ia32_CondJmp(n) || \
282 is_ia32_fCondJmp(n) || \
283 is_ia32_SwitchJmp(n)))
286 buf = xcalloc(1, SNPRINTF_BUF_LEN);
289 memset(buf, 0, SNPRINTF_BUF_LEN);
292 switch(get_ia32_op_type(n)) {
294 if (get_ia32_cnst(n)) {
295 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
298 const arch_register_t *in1 = get_in_reg(n, 2);
299 const arch_register_t *in2 = get_in_reg(n, 3);
300 const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
301 const arch_register_t *in;
303 in = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
304 out = out ? out : in1;
306 snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", \
307 arch_register_get_name(out), arch_register_get_name(in));
311 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%4S, %s", n, ia32_emit_am(n, env));
314 if (get_ia32_cnst(n)) {
315 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
316 ia32_emit_am(n, env),
317 get_ia32_sc(n) ? " OFFSET FLAT:" : " ", /* In case of a symconst we must add OFFSET to */
318 get_ia32_cnst(n)); /* tell the assembler to store it's address. */
321 const arch_register_t *in1 = get_in_reg(n, 2);
322 ir_mode *mode = get_ia32_res_mode(n);
324 mode = mode ? mode : get_ia32_ls_mode(n);
325 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %%%s",
326 ia32_emit_am(n, env), ia32_get_reg_name_for_mode(env, mode, in1));
330 assert(0 && "unsupported op type");
333 #undef PRODUCES_RESULT
339 * Emits registers and/or address mode of a unary operation.
341 char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
342 static char *buf = NULL;
345 buf = xcalloc(1, SNPRINTF_BUF_LEN);
348 memset(buf, 0, SNPRINTF_BUF_LEN);
351 switch(get_ia32_op_type(n)) {
353 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
356 snprintf(buf, SNPRINTF_BUF_LEN, ia32_emit_am(n, env));
359 assert(0 && "unsupported op type");
366 * Emits address mode.
368 char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
369 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
373 static struct obstack *obst = NULL;
374 ir_mode *mode = get_ia32_ls_mode(n);
376 if (! is_ia32_Lea(n))
377 assert(mode && "AM node must have ls_mode attribute set.");
380 obst = xcalloc(1, sizeof(*obst));
383 obstack_free(obst, NULL);
386 /* obstack_free with NULL results in an uninitialized obstack */
390 switch (get_mode_size_bits(mode)) {
392 obstack_printf(obst, "BYTE PTR ");
395 obstack_printf(obst, "WORD PTR ");
398 obstack_printf(obst, "DWORD PTR ");
405 obstack_printf(obst, "[");
407 if (am_flav & ia32_B) {
408 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
412 if (am_flav & ia32_I) {
414 obstack_printf(obst, "+");
417 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
419 if (am_flav & ia32_S) {
420 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
426 if (am_flav & ia32_O) {
427 obstack_printf(obst, get_ia32_am_offs(n));
430 obstack_printf(obst, "] ");
432 size = obstack_object_size(obst);
433 s = obstack_finish(obst);
442 * Formated print of commands and comments.
444 static void ia32_fprintf_format(FILE *F, char *cmd_buf, char *cmnt_buf) {
445 fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
451 * Add a number to a prefix. This number will not be used a second time.
453 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
454 static unsigned long id = 0;
455 snprintf(buf, buflen, "%s%lu", prefix, ++id);
461 /*************************************************
464 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
465 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
466 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
467 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
469 *************************************************/
472 #define IA32_DO_EMIT ia32_fprintf_format(F, cmd_buf, cmnt_buf)
475 * coding of conditions
477 struct cmp2conditon_t {
483 * positive conditions for signed compares
485 static const struct cmp2conditon_t cmp2condition_s[] = {
486 { NULL, pn_Cmp_False }, /* always false */
487 { "e", pn_Cmp_Eq }, /* == */
488 { "l", pn_Cmp_Lt }, /* < */
489 { "le", pn_Cmp_Le }, /* <= */
490 { "g", pn_Cmp_Gt }, /* > */
491 { "ge", pn_Cmp_Ge }, /* >= */
492 { "ne", pn_Cmp_Lg }, /* != */
493 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
494 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
495 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
496 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
497 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
498 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
499 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
500 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
501 { NULL, pn_Cmp_True }, /* always true */
505 * positive conditions for unsigned compares
507 static const struct cmp2conditon_t cmp2condition_u[] = {
508 { NULL, pn_Cmp_False }, /* always false */
509 { "e", pn_Cmp_Eq }, /* == */
510 { "b", pn_Cmp_Lt }, /* < */
511 { "be", pn_Cmp_Le }, /* <= */
512 { "a", pn_Cmp_Gt }, /* > */
513 { "ae", pn_Cmp_Ge }, /* >= */
514 { "ne", pn_Cmp_Lg }, /* != */
515 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
516 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
517 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
518 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
519 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
520 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
521 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
522 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
523 { NULL, pn_Cmp_True }, /* always true */
527 * returns the condition code
529 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
531 assert(cmp2condition_s[cmp_code].num == cmp_code);
532 assert(cmp2condition_u[cmp_code].num == cmp_code);
534 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
538 * Returns the target block for a control flow node.
540 static ir_node *get_cfop_target_block(const ir_node *irn) {
541 return get_irn_link(irn);
545 * Returns the target label for a control flow node.
547 static char *get_cfop_target(const ir_node *irn, char *buf) {
548 ir_node *bl = get_cfop_target_block(irn);
550 snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
554 /** Return the next block in Block schedule */
555 static ir_node *next_blk_sched(const ir_node *block) {
556 return have_block_sched ? get_irn_link(block) : NULL;
560 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
562 static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
563 const ir_node *proj1, *proj2 = NULL;
564 const ir_node *block, *next_bl = NULL;
565 const ir_edge_t *edge;
566 char buf[SNPRINTF_BUF_LEN];
567 char cmd_buf[SNPRINTF_BUF_LEN];
568 char cmnt_buf[SNPRINTF_BUF_LEN];
570 /* get both Proj's */
571 edge = get_irn_out_edge_first(irn);
572 proj1 = get_edge_src_irn(edge);
573 assert(is_Proj(proj1) && "CondJmp with a non-Proj");
575 edge = get_irn_out_edge_next(irn, edge);
577 proj2 = get_edge_src_irn(edge);
578 assert(is_Proj(proj2) && "CondJmp with a non-Proj");
581 /* for now, the code works for scheduled and non-schedules blocks */
582 block = get_nodes_block(irn);
584 /* we have a block schedule */
585 next_bl = next_blk_sched(block);
587 if (get_cfop_target_block(proj1) == next_bl) {
588 /* exchange both proj's so the second one can be omitted */
589 const ir_node *t = proj1;
595 /* the first Proj must always be created */
596 if (get_Proj_proj(proj1) == pn_Cond_true) {
597 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
598 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
599 get_cfop_target(proj1, buf));
600 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == TRUE */");
603 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
604 get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), mode),
605 !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
606 get_cfop_target(proj1, buf));
607 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == FALSE */");
611 /* the second Proj might be a fallthrough */
613 if (get_cfop_target_block(proj2) != next_bl) {
614 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj2, buf));
615 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
619 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrogh %s */", get_cfop_target(proj2, buf));
626 * Emits code for conditional jump.
628 static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
630 char cmd_buf[SNPRINTF_BUF_LEN];
631 char cmnt_buf[SNPRINTF_BUF_LEN];
633 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
634 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
636 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
640 * Emits code for conditional jump with two variables.
642 static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
643 CondJmp_emitter(irn, env);
647 * Emits code for conditional jump with immediate.
649 void emit_ia32_CondJmp_i(const ir_node *irn, ia32_emit_env_t *env) {
650 CondJmp_emitter(irn, env);
654 * Emits code for conditional test and jump.
656 static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
658 const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
659 const char *op2 = get_ia32_cnst(irn);
660 char cmd_buf[SNPRINTF_BUF_LEN];
661 char cmnt_buf[SNPRINTF_BUF_LEN];
664 op2 = arch_register_get_name(get_in_reg(irn, 1));
666 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, get_ia32_cnst(irn) ? " " : " %", op2);
667 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
670 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
674 * Emits code for conditional test and jump with two variables.
676 static void emit_ia32_TestJmp(const ir_node *irn, ia32_emit_env_t *env) {
677 TestJmp_emitter(irn, env);
680 static void emit_ia32_CJmp(const ir_node *irn, ia32_emit_env_t *env) {
682 char cmd_buf[SNPRINTF_BUF_LEN];
683 char cmnt_buf[SNPRINTF_BUF_LEN];
685 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
686 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
688 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
691 static void emit_ia32_CJmpAM(const ir_node *irn, ia32_emit_env_t *env) {
693 char cmd_buf[SNPRINTF_BUF_LEN];
694 char cmnt_buf[SNPRINTF_BUF_LEN];
696 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
697 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
699 finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
702 /*********************************************************
705 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
706 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
707 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
708 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
711 *********************************************************/
713 /* jump table entry (target and corresponding number) */
714 typedef struct _branch_t {
719 /* jump table for switch generation */
720 typedef struct _jmp_tbl_t {
721 ir_node *defProj; /**< default target */
722 int min_value; /**< smallest switch case */
723 int max_value; /**< largest switch case */
724 int num_branches; /**< number of jumps */
725 char *label; /**< label of the jump table */
726 branch_t *branches; /**< jump array */
730 * Compare two variables of type branch_t. Used to sort all switch cases
732 static int ia32_cmp_branch_t(const void *a, const void *b) {
733 branch_t *b1 = (branch_t *)a;
734 branch_t *b2 = (branch_t *)b;
736 if (b1->value <= b2->value)
743 * Emits code for a SwitchJmp (creates a jump table if
744 * possible otherwise a cmp-jmp cascade). Port from
747 void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
748 unsigned long interval;
749 char buf[SNPRINTF_BUF_LEN];
750 int last_value, i, pn, do_jmp_tbl = 1;
753 const ir_edge_t *edge;
754 const lc_arg_env_t *env = ia32_get_arg_env();
755 FILE *F = emit_env->out;
756 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
758 /* fill the table structure */
759 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
760 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
762 tbl.num_branches = get_irn_n_edges(irn);
763 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
764 tbl.min_value = INT_MAX;
765 tbl.max_value = INT_MIN;
768 /* go over all proj's and collect them */
769 foreach_out_edge(irn, edge) {
770 proj = get_edge_src_irn(edge);
771 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
773 pn = get_Proj_proj(proj);
775 /* create branch entry */
776 tbl.branches[i].target = proj;
777 tbl.branches[i].value = pn;
779 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
780 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
782 /* check for default proj */
783 if (pn == get_ia32_pncode(irn)) {
784 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
791 /* sort the branches by their number */
792 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
794 /* two-complement's magic make this work without overflow */
795 interval = tbl.max_value - tbl.min_value;
797 /* check value interval */
798 if (interval > 16 * 1024) {
802 /* check ratio of value interval to number of branches */
803 if ((float)(interval + 1) / (float)tbl.num_branches > 8.0) {
809 if (tbl.min_value != 0) {
810 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, -%d(%1S)",
811 interval, tbl.min_value, irn);
812 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* first switch value is not 0 */");
817 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %lu, %1S", interval, irn);
818 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* compare for switch */");
823 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
824 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default jump if out of range */");
827 if (tbl.num_branches > 1) {
830 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp [%1S*4+%s]", irn, tbl.label);
831 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* get jump table entry as target */");
834 fprintf(F, "\t.section\t.rodata\n");
835 fprintf(F, "\t.align 4\n");
837 fprintf(F, "%s:\n", tbl.label);
839 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
840 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */\n", tbl.branches[0].value);
843 last_value = tbl.branches[0].value;
844 for (i = 1; i < tbl.num_branches; ++i) {
845 while (++last_value < tbl.branches[i].value) {
846 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
847 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
850 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf));
851 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", last_value);
855 fprintf(F, "\t.text");
858 /* one jump is enough */
859 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
860 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* only one case given */");
864 else { // no jump table
865 for (i = 0; i < tbl.num_branches; ++i) {
866 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmpl %d, %1S", tbl.branches[i].value, irn);
867 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", i);
869 fprintf(F, "\tje %s\n", get_cfop_target(tbl.branches[i].target, buf));
872 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.defProj, buf));
873 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
884 * Emits code for a unconditional jump.
886 void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
887 ir_node *block, *next_bl;
889 char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
891 /* for now, the code works for scheduled and non-schedules blocks */
892 block = get_nodes_block(irn);
894 /* we have a block schedule */
895 next_bl = next_blk_sched(block);
896 if (get_cfop_target_block(irn) != next_bl) {
897 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
898 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F) */", irn, get_cfop_target_block(irn));
902 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(irn, buf));
907 /****************************
910 * _ __ _ __ ___ _ ___
911 * | '_ \| '__/ _ \| |/ __|
912 * | |_) | | | (_) | |\__ \
913 * | .__/|_| \___/| ||___/
916 ****************************/
919 * Emits code for a proj -> node
921 void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
922 ir_node *pred = get_Proj_pred(irn);
924 if (get_irn_op(pred) == op_Start) {
925 switch(get_Proj_proj(irn)) {
926 case pn_Start_X_initial_exec:
935 /**********************************
938 * | | ___ _ __ _ _| |_) |
939 * | | / _ \| '_ \| | | | _ <
940 * | |___| (_) | |_) | |_| | |_) |
941 * \_____\___/| .__/ \__, |____/
944 **********************************/
947 * Emit movsb/w instructions to make mov count divideable by 4
949 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
950 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
952 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
954 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
955 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
960 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
961 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 1 */");
964 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
965 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 2 */");
968 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
969 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
971 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
972 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
980 * Emit rep movsd instruction for memcopy.
982 void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
983 FILE *F = emit_env->out;
984 tarval *tv = get_ia32_Immop_tarval(irn);
985 int rem = get_tarval_long(tv);
986 int size = get_tarval_long(get_ia32_Immop_tarval(get_irn_n(irn, 2)));
987 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
989 emit_CopyB_prolog(F, rem, size);
991 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
992 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy */");
997 * Emits unrolled memcopy.
999 void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
1000 tarval *tv = get_ia32_Immop_tarval(irn);
1001 int size = get_tarval_long(tv);
1002 FILE *F = emit_env->out;
1003 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1005 emit_CopyB_prolog(F, size & 0x3, size);
1009 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
1010 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy unrolled */");
1017 /***************************
1021 * | | / _ \| '_ \ \ / /
1022 * | |___| (_) | | | \ V /
1023 * \_____\___/|_| |_|\_/
1025 ***************************/
1028 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
1030 static void emit_ia32_Conv_with_FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1031 FILE *F = emit_env->out;
1032 const lc_arg_env_t *env = ia32_get_arg_env();
1033 char *from, *to, buf[64];
1034 ir_mode *src_mode, *tgt_mode;
1035 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1037 src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
1038 tgt_mode = get_ia32_res_mode(irn);
1040 from = mode_is_float(src_mode) ? (get_mode_size_bits(src_mode) == 32 ? "ss" : "sd") : "si";
1041 to = mode_is_float(tgt_mode) ? (get_mode_size_bits(tgt_mode) == 32 ? "ss" : "sd") : "si";
1043 switch(get_ia32_op_type(irn)) {
1045 lc_esnprintf(env, buf, sizeof(buf), "%1D, %3S", irn, irn);
1047 case ia32_AddrModeS:
1048 lc_esnprintf(env, buf, sizeof(buf), "%1D, %s", irn, ia32_emit_am(irn, emit_env));
1051 assert(0 && "unsupported op type for Conv");
1054 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cvt%s2%s %s", from, to, buf);
1055 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F, %+F) */", irn, src_mode, tgt_mode);
1059 void emit_ia32_Conv_I2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1060 emit_ia32_Conv_with_FP(irn, emit_env);
1063 void emit_ia32_Conv_FP2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1064 emit_ia32_Conv_with_FP(irn, emit_env);
1067 void emit_ia32_Conv_FP2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1068 emit_ia32_Conv_with_FP(irn, emit_env);
1072 * Emits code for an Int conversion.
1074 void emit_ia32_Conv_I2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1075 FILE *F = emit_env->out;
1076 const lc_arg_env_t *env = ia32_get_arg_env();
1077 char *move_cmd, *conv_cmd;
1078 ir_mode *src_mode, *tgt_mode;
1080 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1081 const arch_register_t *in_reg, *out_reg;
1083 src_mode = is_ia32_AddrModeS(irn) ? get_ia32_ls_mode(irn) : get_irn_mode(get_irn_n(irn, 2));
1084 tgt_mode = get_ia32_res_mode(irn);
1086 n = get_mode_size_bits(src_mode);
1087 m = get_mode_size_bits(tgt_mode);
1089 if (mode_is_signed(n < m ? src_mode : tgt_mode)) {
1091 if (n == 8 || m == 8)
1093 else if (n == 16 || m == 16)
1096 assert(0 && "unsupported Conv_I2I");
1103 switch(get_ia32_op_type(irn)) {
1105 in_reg = get_in_reg(irn, 2);
1106 out_reg = get_out_reg(irn, 0);
1108 if (REGS_ARE_EQUAL(in_reg, &ia32_gp_regs[REG_EAX]) &&
1109 REGS_ARE_EQUAL(out_reg, in_reg) &&
1110 mode_is_signed(n < m ? src_mode : tgt_mode))
1112 /* argument and result are both in EAX and */
1113 /* signedness is ok: -> use converts */
1114 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s", conv_cmd);
1116 else if (REGS_ARE_EQUAL(out_reg, in_reg) &&
1117 ! mode_is_signed(n < m ? src_mode : tgt_mode))
1119 /* argument and result are in the same register */
1120 /* and signedness is ok: -> use and with mask */
1121 int mask = (1 << (n < m ? n : m)) - 1;
1122 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "and %1D, 0x%x", irn, mask);
1125 /* use move w/o sign extension */
1126 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %%%s",
1127 move_cmd, irn, ia32_get_reg_name_for_mode(emit_env, n < m ? src_mode : tgt_mode, in_reg));
1131 case ia32_AddrModeS:
1132 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %s",
1133 move_cmd, irn, ia32_emit_am(irn, emit_env));
1136 assert(0 && "unsupported op type for Conv");
1139 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%d Bit mode_%F -> %d Bit mode_%F) */",
1140 irn, n, src_mode, m, tgt_mode);
1145 /*******************************************
1148 * | |__ ___ _ __ ___ __| | ___ ___
1149 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
1150 * | |_) | __/ | | | (_) | (_| | __/\__ \
1151 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
1153 *******************************************/
1156 * Emits a backend call
1158 void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
1159 FILE *F = emit_env->out;
1160 entity *ent = be_Call_get_entity(irn);
1161 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1164 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "call %s", get_entity_name(ent));
1167 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "%1D", get_irn_n(irn, be_pos_Call_ptr));
1170 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (be_Call) */", irn);
1176 * Emits code to increase stack pointer.
1178 void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1179 FILE *F = emit_env->out;
1180 unsigned offs = be_get_IncSP_offset(irn);
1181 be_stack_dir_t dir = be_get_IncSP_direction(irn);
1182 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1185 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S,%s%u", irn,
1186 (dir == be_stack_dir_along) ? " -" : " ", offs);
1187 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (IncSP) */", irn);
1190 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1191 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* omitted %+F (IncSP) with 0 */", irn);
1198 * Emits code to set stack pointer.
1200 void emit_be_SetSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1201 FILE *F = emit_env->out;
1202 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1204 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
1205 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (restore SP) */", irn);
1210 * Emits code for Copy.
1212 void emit_be_Copy(const ir_node *irn, ia32_emit_env_t *emit_env) {
1213 FILE *F = emit_env->out;
1214 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1216 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %1S", irn, irn);
1217 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
1222 * Emits code for exchange.
1224 void emit_be_Perm(const ir_node *irn, ia32_emit_env_t *emit_env) {
1225 FILE *F = emit_env->out;
1226 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1228 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "xchg %1S, %2S", irn, irn);
1229 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%1A, %2A) */", irn, irn, irn);
1233 /***********************************************************************************
1236 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
1237 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
1238 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
1239 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
1241 ***********************************************************************************/
1244 * Enters the emitter functions for handled nodes into the generic
1245 * pointer of an opcode.
1247 static void ia32_register_emitters(void) {
1249 #define IA32_EMIT(a) op_ia32_##a->ops.generic = (op_func)emit_ia32_##a
1250 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
1251 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
1253 /* first clear the generic function pointer for all ops */
1254 clear_irp_opcodes_generic_func();
1256 /* register all emitter functions defined in spec */
1257 ia32_register_spec_emitters();
1259 /* other ia32 emitter functions */
1264 IA32_EMIT(SwitchJmp);
1267 IA32_EMIT(Conv_I2FP);
1268 IA32_EMIT(Conv_FP2I);
1269 IA32_EMIT(Conv_FP2FP);
1270 IA32_EMIT(Conv_I2I);
1272 /* benode emitter */
1289 * Emits code for a node.
1291 static void ia32_emit_node(const ir_node *irn, void *env) {
1292 ia32_emit_env_t *emit_env = env;
1293 firm_dbg_module_t *mod = emit_env->mod;
1294 FILE *F = emit_env->out;
1295 ir_op *op = get_irn_op(irn);
1297 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
1299 if (op->ops.generic) {
1300 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
1304 ir_fprintf(F, "\t%35s /* %+F */\n", " ", irn);
1309 * Walks over the nodes in a block connected by scheduling edges
1310 * and emits code for each node.
1312 static void ia32_gen_block(ir_node *block, void *env) {
1315 if (! is_Block(block))
1318 fprintf(((ia32_emit_env_t *)env)->out, BLOCK_PREFIX("%ld:\n"), get_irn_node_nr(block));
1319 sched_foreach(block, irn) {
1320 ia32_emit_node(irn, env);
1325 * Emits code for function start.
1327 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg) {
1328 entity *irg_ent = get_irg_entity(irg);
1329 const char *irg_name = get_entity_name(irg_ent);
1331 fprintf(F, "\t.text\n");
1332 if (get_entity_visibility(irg_ent) == visibility_external_visible) {
1333 fprintf(F, ".globl %s\n", irg_name);
1335 fprintf(F, "\t.type\t%s, @function\n", irg_name);
1336 fprintf(F, "%s:\n", irg_name);
1340 * Emits code for function end
1342 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
1343 const char *irg_name = get_entity_name(get_irg_entity(irg));
1345 fprintf(F, "\tret\n");
1346 fprintf(F, "\t.size\t%s, .-%s\n\n", irg_name, irg_name);
1351 * Sets labels for control flow nodes (jump target)
1352 * TODO: Jump optimization
1354 static void ia32_gen_labels(ir_node *block, void *env) {
1356 int n = get_Block_n_cfgpreds(block);
1358 for (n--; n >= 0; n--) {
1359 pred = get_Block_cfgpred(block, n);
1360 set_irn_link(pred, block);
1370 * Ext-Block walker: create a block schedule
1372 static void create_block_list(ir_extblk *blk, void *env) {
1376 for (i = 0, n = get_extbb_n_blocks(blk); i < n; ++i) {
1377 ir_node *block = get_extbb_block(blk, i);
1379 set_irn_link(block, NULL);
1381 set_irn_link(list->end, block);
1383 list->start = block;
1390 * Main driver. Emits the code for one routine.
1392 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
1393 ia32_emit_env_t emit_env;
1397 emit_env.mod = firm_dbg_register("firm.be.ia32.emitter");
1399 emit_env.arch_env = cg->arch_env;
1401 emit_env.isa = (ia32_isa_t *)cg->arch_env->isa;
1403 /* set the global arch_env (needed by print hooks) */
1404 arch_env = cg->arch_env;
1406 ia32_register_emitters();
1408 ia32_emit_func_prolog(F, irg);
1409 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
1411 if (cg->opt.extbb) {
1412 /* schedule extended basic blocks */
1418 irg_extblock_walk_graph(irg, NULL, create_block_list, &list);
1420 have_block_sched = 1;
1421 for (block = list.start; block; block = get_irn_link(block))
1422 ia32_gen_block(block, &emit_env);
1425 /* "normal" block schedule */
1427 have_block_sched = 0;
1428 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
1431 ia32_emit_func_epilog(F, irg);