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"
33 #include "bearch_ia32_t.h"
35 #define BLOCK_PREFIX(x) ".L" x
37 #define SNPRINTF_BUF_LEN 128
39 /* global arch_env for lc_printf functions */
40 static const arch_env_t *arch_env = NULL;
42 /** by default, we generate assembler code for the Linux gas */
43 asm_flavour_t asm_flavour = ASM_LINUX_GAS;
46 * Switch to a new section
48 void ia32_switch_section(FILE *F, section_t sec) {
49 static section_t curr_sec = NO_SECTION;
50 static const char *text[ASM_MAX][SECTION_MAX] = {
52 ".section\t.text", ".section\t.data", ".section\t.rodata", ".section\t.text"
55 ".section\t.text", ".section\t.data", ".section .rdata,\"dr\"", ".section\t.text"
72 fprintf(F, "\t%s\n", text[asm_flavour][sec]);
76 static void ia32_dump_function_object(FILE *F, const char *name)
78 switch (asm_flavour) {
80 fprintf(F, "\t.type\t%s, @function\n", name);
83 fprintf(F, "\t.def\t%s;\t.scl\t2;\t.type\t32;\t.endef\n", name);
88 static void ia32_dump_function_size(FILE *F, const char *name)
90 switch (asm_flavour) {
92 fprintf(F, "\t.size\t%s, .-%s\n", name, name);
97 /*************************************************************
99 * (_) | | / _| | | | |
100 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
101 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
102 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
103 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
106 *************************************************************/
108 static INLINE int be_is_unknown_reg(const arch_register_t *reg) {
110 REGS_ARE_EQUAL(reg, &ia32_gp_regs[REG_GP_UKNWN]) || \
111 REGS_ARE_EQUAL(reg, &ia32_xmm_regs[REG_XMM_UKNWN]) || \
112 REGS_ARE_EQUAL(reg, &ia32_vfp_regs[REG_VFP_UKNWN]);
116 * returns true if a node has x87 registers
118 static INLINE int has_x87_register(const ir_node *n) {
119 return is_irn_machine_user(n, 0);
122 /* We always pass the ir_node which is a pointer. */
123 static int ia32_get_arg_type(const lc_arg_occ_t *occ) {
124 return lc_arg_type_ptr;
129 * Returns the register at in position pos.
131 static const arch_register_t *get_in_reg(const ir_node *irn, int pos) {
133 const arch_register_t *reg = NULL;
135 assert(get_irn_arity(irn) > pos && "Invalid IN position");
137 /* The out register of the operator at position pos is the
138 in register we need. */
139 op = get_irn_n(irn, pos);
141 reg = arch_get_irn_register(arch_env, op);
143 assert(reg && "no in register found");
145 /* in case of unknown: just return a register */
146 if (REGS_ARE_EQUAL(reg, &ia32_gp_regs[REG_GP_UKNWN]))
147 reg = &ia32_gp_regs[REG_EAX];
148 else if (REGS_ARE_EQUAL(reg, &ia32_xmm_regs[REG_XMM_UKNWN]))
149 reg = &ia32_xmm_regs[REG_XMM0];
150 else if (REGS_ARE_EQUAL(reg, &ia32_vfp_regs[REG_VFP_UKNWN]))
151 reg = &ia32_vfp_regs[REG_VF0];
157 * Returns the register at out position pos.
159 static const arch_register_t *get_out_reg(const ir_node *irn, int pos) {
161 const arch_register_t *reg = NULL;
163 /* 1st case: irn is not of mode_T, so it has only */
164 /* one OUT register -> good */
165 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
166 /* Proj with the corresponding projnum for the register */
168 if (get_irn_mode(irn) != mode_T) {
169 reg = arch_get_irn_register(arch_env, irn);
171 else if (is_ia32_irn(irn)) {
172 reg = get_ia32_out_reg(irn, pos);
175 const ir_edge_t *edge;
177 foreach_out_edge(irn, edge) {
178 proj = get_edge_src_irn(edge);
179 assert(is_Proj(proj) && "non-Proj from mode_T node");
180 if (get_Proj_proj(proj) == pos) {
181 reg = arch_get_irn_register(arch_env, proj);
187 assert(reg && "no out register found");
197 * Returns the name of the in register at position pos.
199 static const char *get_ia32_reg_name(ir_node *irn, int pos, enum io_direction in_out) {
200 const arch_register_t *reg;
202 if (in_out == IN_REG) {
203 reg = get_in_reg(irn, pos);
205 if (reg->reg_class == &ia32_reg_classes[CLASS_ia32_vfp]) {
206 /* FIXME: works for binop only */
207 assert(2 <= pos && pos <= 3);
208 reg = get_ia32_attr(irn)->x87[pos - 2];
212 /* destination address mode nodes don't have outputs */
213 if (is_ia32_irn(irn) && get_ia32_op_type(irn) == ia32_AddrModeD) {
217 reg = get_out_reg(irn, pos);
218 if (reg->reg_class == &ia32_reg_classes[CLASS_ia32_vfp])
219 reg = get_ia32_attr(irn)->x87[pos + 2];
221 return arch_register_get_name(reg);
225 * Get the register name for a node.
227 static int ia32_get_reg_name(lc_appendable_t *app,
228 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
231 ir_node *irn = arg->v_ptr;
232 int nr = occ->width - 1;
235 return lc_appendable_snadd(app, "(null)", 6);
237 buf = get_ia32_reg_name(irn, nr, occ->conversion == 'S' ? IN_REG : OUT_REG);
239 /* append the stupid % to register names */
240 lc_appendable_chadd(app, '%');
241 return lc_appendable_snadd(app, buf, strlen(buf));
245 * Get the x87 register name for a node.
247 static int ia32_get_x87_name(lc_appendable_t *app,
248 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
251 ir_node *irn = arg->v_ptr;
252 int nr = occ->width - 1;
256 return lc_appendable_snadd(app, "(null)", 6);
258 attr = get_ia32_attr(irn);
259 buf = attr->x87[nr]->name;
260 lc_appendable_chadd(app, '%');
261 return lc_appendable_snadd(app, buf, strlen(buf));
265 * Returns the tarval, offset or scale of an ia32 as a string.
267 static int ia32_const_to_str(lc_appendable_t *app,
268 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
271 ir_node *irn = arg->v_ptr;
274 return lc_arg_append(app, occ, "(null)", 6);
276 if (occ->conversion == 'C') {
277 buf = get_ia32_cnst(irn);
280 buf = get_ia32_am_offs(irn);
283 return buf ? lc_appendable_snadd(app, buf, strlen(buf)) : 0;
287 * Determines the SSE suffix depending on the mode.
289 static int ia32_get_mode_suffix(lc_appendable_t *app,
290 const lc_arg_occ_t *occ, const lc_arg_value_t *arg)
292 ir_node *irn = arg->v_ptr;
293 ir_mode *mode = get_irn_mode(irn);
295 if (mode == mode_T) {
296 mode = (is_ia32_Ld(irn) || is_ia32_St(irn)) ? get_ia32_ls_mode(irn) : get_ia32_res_mode(irn);
300 return lc_arg_append(app, occ, "(null)", 6);
302 if (mode_is_float(mode)) {
303 return lc_appendable_chadd(app, get_mode_size_bits(mode) == 32 ? 's' : 'd');
306 return lc_appendable_chadd(app, mode_is_signed(mode) ? 's' : 'z');
311 * Return the ia32 printf arg environment.
312 * We use the firm environment with some additional handlers.
314 const lc_arg_env_t *ia32_get_arg_env(void) {
315 static lc_arg_env_t *env = NULL;
317 static const lc_arg_handler_t ia32_reg_handler = { ia32_get_arg_type, ia32_get_reg_name };
318 static const lc_arg_handler_t ia32_const_handler = { ia32_get_arg_type, ia32_const_to_str };
319 static const lc_arg_handler_t ia32_mode_handler = { ia32_get_arg_type, ia32_get_mode_suffix };
320 static const lc_arg_handler_t ia32_x87_handler = { ia32_get_arg_type, ia32_get_x87_name };
323 /* extend the firm printer */
324 env = firm_get_arg_env();
326 lc_arg_register(env, "ia32:sreg", 'S', &ia32_reg_handler);
327 lc_arg_register(env, "ia32:dreg", 'D', &ia32_reg_handler);
328 lc_arg_register(env, "ia32:cnst", 'C', &ia32_const_handler);
329 lc_arg_register(env, "ia32:offs", 'O', &ia32_const_handler);
330 lc_arg_register(env, "ia32:mode", 'M', &ia32_mode_handler);
331 lc_arg_register(env, "ia32:x87", 'X', &ia32_x87_handler);
337 static const char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
338 switch(get_mode_size_bits(mode)) {
340 return ia32_get_mapped_reg_name(env->isa->regs_8bit, reg);
342 return ia32_get_mapped_reg_name(env->isa->regs_16bit, reg);
344 return (char *)arch_register_get_name(reg);
349 * Emits registers and/or address mode of a binary operation.
351 const char *ia32_emit_binop(const ir_node *n, ia32_emit_env_t *env) {
352 static char *buf = NULL;
354 /* verify that this function is never called on non-AM supporting operations */
355 //assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
357 #define PRODUCES_RESULT(n) \
358 (!(is_ia32_St(n) || \
359 is_ia32_Store8Bit(n) || \
360 is_ia32_CondJmp(n) || \
361 is_ia32_xCondJmp(n) || \
362 is_ia32_CmpSet(n) || \
363 is_ia32_xCmpSet(n) || \
364 is_ia32_SwitchJmp(n)))
367 buf = xcalloc(1, SNPRINTF_BUF_LEN);
370 memset(buf, 0, SNPRINTF_BUF_LEN);
373 switch(get_ia32_op_type(n)) {
375 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
376 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, get_ia32_cnst(n));
379 const arch_register_t *in1 = get_in_reg(n, 2);
380 const arch_register_t *in2 = get_in_reg(n, 3);
381 const arch_register_t *out = PRODUCES_RESULT(n) ? get_out_reg(n, 0) : NULL;
382 const arch_register_t *in;
385 in = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
386 out = out ? out : in1;
387 in_name = arch_register_get_name(in);
389 if (is_ia32_emit_cl(n)) {
390 assert(REGS_ARE_EQUAL(&ia32_gp_regs[REG_ECX], in) && "shift operation needs ecx");
394 snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", arch_register_get_name(out), in_name);
398 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
399 assert(! PRODUCES_RESULT(n) && "Source AM with Const must not produce result");
400 snprintf(buf, SNPRINTF_BUF_LEN, "%s, %s", get_ia32_cnst(n), ia32_emit_am(n, env));
403 if (PRODUCES_RESULT(n)) {
404 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D, %s", n, ia32_emit_am(n, env));
407 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%3S, %s", n, ia32_emit_am(n, env));
412 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
413 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s,%s%s",
414 ia32_emit_am(n, env),
415 is_ia32_ImmSymConst(n) ? " OFFSET FLAT:" : " ", /* In case of a symconst we must add OFFSET to */
416 get_ia32_cnst(n)); /* tell the assembler to store it's address. */
419 const arch_register_t *in1 = get_in_reg(n, 2);
420 ir_mode *mode = get_ia32_res_mode(n);
423 mode = mode ? mode : get_ia32_ls_mode(n);
424 in_name = ia32_get_reg_name_for_mode(env, mode, in1);
426 if (is_ia32_emit_cl(n)) {
427 assert(REGS_ARE_EQUAL(&ia32_gp_regs[REG_ECX], in1) && "shift operation needs ecx");
431 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s, %%%s", ia32_emit_am(n, env), in_name);
435 assert(0 && "unsupported op type");
438 #undef PRODUCES_RESULT
444 * Returns the xxx PTR string for a given mode
446 * @param mode the mode
447 * @param x87_insn if non-zero returns the string for a x87 instruction
448 * else for a SSE instruction
450 static const char *pointer_size(ir_mode *mode, int x87_insn)
453 switch (get_mode_size_bits(mode)) {
454 case 8: return "BYTE PTR";
455 case 16: return "WORD PTR";
456 case 32: return "DWORD PTR";
462 case 96: return "XWORD PTR";
463 default: return NULL;
470 * Emits registers and/or address mode of a binary operation.
472 const char *ia32_emit_x87_binop(const ir_node *n, ia32_emit_env_t *env) {
473 static char *buf = NULL;
475 /* verify that this function is never called on non-AM supporting operations */
476 //assert(get_ia32_am_support(n) != ia32_am_None && "emit binop expects addressmode support");
479 buf = xcalloc(1, SNPRINTF_BUF_LEN);
482 memset(buf, 0, SNPRINTF_BUF_LEN);
485 switch(get_ia32_op_type(n)) {
487 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
488 ir_mode *mode = get_ia32_ls_mode(n);
489 const char *p = pointer_size(mode, 1);
490 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s %s", p, get_ia32_cnst(n));
493 ia32_attr_t *attr = get_ia32_attr(n);
494 const arch_register_t *in1 = attr->x87[0];
495 const arch_register_t *in2 = attr->x87[1];
496 const arch_register_t *out = attr->x87[2];
497 const arch_register_t *in;
500 in = out ? (REGS_ARE_EQUAL(out, in2) ? in1 : in2) : in2;
501 out = out ? out : in1;
502 in_name = arch_register_get_name(in);
504 snprintf(buf, SNPRINTF_BUF_LEN, "%%%s, %%%s", arch_register_get_name(out), in_name);
509 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
512 assert(0 && "unsupported op type");
515 #undef PRODUCES_RESULT
521 * Emits registers and/or address mode of a unary operation.
523 const char *ia32_emit_unop(const ir_node *n, ia32_emit_env_t *env) {
524 static char *buf = NULL;
527 buf = xcalloc(1, SNPRINTF_BUF_LEN);
530 memset(buf, 0, SNPRINTF_BUF_LEN);
533 switch(get_ia32_op_type(n)) {
535 if (is_ia32_ImmConst(n) || is_ia32_ImmSymConst(n)) {
536 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%C", n);
539 lc_esnprintf(ia32_get_arg_env(), buf, SNPRINTF_BUF_LEN, "%1D", n);
543 snprintf(buf, SNPRINTF_BUF_LEN, "%s", ia32_emit_am(n, env));
546 assert(0 && "unsupported op type");
553 * Emits address mode.
555 const char *ia32_emit_am(const ir_node *n, ia32_emit_env_t *env) {
556 ia32_am_flavour_t am_flav = get_ia32_am_flavour(n);
561 static struct obstack *obst = NULL;
562 ir_mode *mode = get_ia32_ls_mode(n);
564 if (! is_ia32_Lea(n))
565 assert(mode && "AM node must have ls_mode attribute set.");
568 obst = xcalloc(1, sizeof(*obst));
571 obstack_free(obst, NULL);
574 /* obstack_free with NULL results in an uninitialized obstack */
577 p = pointer_size(mode, has_x87_register(n));
579 obstack_printf(obst, "%s ", p);
581 /* emit address mode symconst */
582 if (get_ia32_am_sc(n)) {
583 if (is_ia32_am_sc_sign(n))
584 obstack_printf(obst, "-");
585 obstack_printf(obst, "%s", get_id_str(get_ia32_am_sc(n)));
588 if (am_flav & ia32_B) {
589 obstack_printf(obst, "[");
590 lc_eoprintf(ia32_get_arg_env(), obst, "%1S", n);
594 if (am_flav & ia32_I) {
596 obstack_printf(obst, "+");
599 obstack_printf(obst, "[");
602 lc_eoprintf(ia32_get_arg_env(), obst, "%2S", n);
604 if (am_flav & ia32_S) {
605 obstack_printf(obst, "*%d", 1 << get_ia32_am_scale(n));
611 if (am_flav & ia32_O) {
612 s = get_ia32_am_offs(n);
615 /* omit explicit + if there was no base or index */
617 obstack_printf(obst, "[");
622 obstack_printf(obst, s);
628 obstack_printf(obst, "] ");
630 size = obstack_object_size(obst);
631 s = obstack_finish(obst);
640 const char *ia32_emit_adr(const ir_node *irn, ia32_emit_env_t *env)
642 static char buf[SNPRINTF_BUF_LEN];
643 ir_mode *mode = get_ia32_ls_mode(irn);
644 const char *adr = get_ia32_cnst(irn);
645 const char *pref = pointer_size(mode, has_x87_register(irn));
647 snprintf(buf, SNPRINTF_BUF_LEN, "%s %s", pref ? pref : "", adr);
652 * Formated print of commands and comments.
654 static void ia32_fprintf_format(FILE *F, const ir_node *irn, char *cmd_buf, char *cmnt_buf) {
656 const char *name = irn ? be_retrieve_dbg_info(get_irn_dbg_info((ir_node *)irn), &lineno) : NULL;
659 fprintf(F, "\t%-35s %-60s /* %s:%u */\n", cmd_buf, cmnt_buf, name, lineno);
661 fprintf(F, "\t%-35s %-60s\n", cmd_buf, cmnt_buf);
667 * Add a number to a prefix. This number will not be used a second time.
669 static char *get_unique_label(char *buf, size_t buflen, const char *prefix) {
670 static unsigned long id = 0;
671 snprintf(buf, buflen, "%s%lu", prefix, ++id);
677 /*************************************************
680 * ___ _ __ ___ _| |_ ___ ___ _ __ __| |
681 * / _ \ '_ ` _ \| | __| / __/ _ \| '_ \ / _` |
682 * | __/ | | | | | | |_ | (_| (_) | | | | (_| |
683 * \___|_| |_| |_|_|\__| \___\___/|_| |_|\__,_|
685 *************************************************/
688 #define IA32_DO_EMIT(irn) ia32_fprintf_format(F, irn, cmd_buf, cmnt_buf)
691 * coding of conditions
693 struct cmp2conditon_t {
699 * positive conditions for signed compares
701 static const struct cmp2conditon_t cmp2condition_s[] = {
702 { NULL, pn_Cmp_False }, /* always false */
703 { "e", pn_Cmp_Eq }, /* == */
704 { "l", pn_Cmp_Lt }, /* < */
705 { "le", pn_Cmp_Le }, /* <= */
706 { "g", pn_Cmp_Gt }, /* > */
707 { "ge", pn_Cmp_Ge }, /* >= */
708 { "ne", pn_Cmp_Lg }, /* != */
709 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
710 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
711 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
712 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
713 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
714 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
715 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
716 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
717 { NULL, pn_Cmp_True }, /* always true */
721 * positive conditions for unsigned compares
723 static const struct cmp2conditon_t cmp2condition_u[] = {
724 { NULL, pn_Cmp_False }, /* always false */
725 { "e", pn_Cmp_Eq }, /* == */
726 { "b", pn_Cmp_Lt }, /* < */
727 { "be", pn_Cmp_Le }, /* <= */
728 { "a", pn_Cmp_Gt }, /* > */
729 { "ae", pn_Cmp_Ge }, /* >= */
730 { "ne", pn_Cmp_Lg }, /* != */
731 { "ordered", pn_Cmp_Leg }, /* Floating point: ordered */
732 { "unordered", pn_Cmp_Uo }, /* FLoting point: unordered */
733 { "unordered or ==", pn_Cmp_Ue }, /* Floating point: unordered or == */
734 { "unordered or <", pn_Cmp_Ul }, /* Floating point: unordered or < */
735 { "unordered or <=", pn_Cmp_Ule }, /* Floating point: unordered or <= */
736 { "unordered or >", pn_Cmp_Ug }, /* Floating point: unordered or > */
737 { "unordered or >=", pn_Cmp_Uge }, /* Floating point: unordered or >= */
738 { "unordered or !=", pn_Cmp_Ne }, /* Floating point: unordered or != */
739 { NULL, pn_Cmp_True }, /* always true */
743 * returns the condition code
745 static const char *get_cmp_suffix(int cmp_code, int unsigned_cmp)
747 assert(cmp2condition_s[cmp_code].num == cmp_code);
748 assert(cmp2condition_u[cmp_code].num == cmp_code);
750 return unsigned_cmp ? cmp2condition_u[cmp_code & 7].name : cmp2condition_s[cmp_code & 7].name;
754 * Returns the target block for a control flow node.
756 static ir_node *get_cfop_target_block(const ir_node *irn) {
757 return get_irn_link(irn);
761 * Returns the target label for a control flow node.
763 static char *get_cfop_target(const ir_node *irn, char *buf) {
764 ir_node *bl = get_cfop_target_block(irn);
766 snprintf(buf, SNPRINTF_BUF_LEN, BLOCK_PREFIX("%ld"), get_irn_node_nr(bl));
770 /** Return the next block in Block schedule */
771 static ir_node *next_blk_sched(const ir_node *block) {
772 return get_irn_link(block);
776 * Returns the Proj with projection number proj and NOT mode_M
778 static ir_node *get_proj(const ir_node *irn, long proj) {
779 const ir_edge_t *edge;
782 assert(get_irn_mode(irn) == mode_T && "expected mode_T node");
784 foreach_out_edge(irn, edge) {
785 src = get_edge_src_irn(edge);
787 assert(is_Proj(src) && "Proj expected");
788 if (get_irn_mode(src) == mode_M)
791 if (get_Proj_proj(src) == proj)
798 * Emits the jump sequence for a conditional jump (cmp + jmp_true + jmp_false)
800 static void finish_CondJmp(FILE *F, const ir_node *irn, ir_mode *mode) {
801 const ir_node *proj1, *proj2 = NULL;
802 const ir_node *block, *next_bl = NULL;
803 char buf[SNPRINTF_BUF_LEN];
804 char cmd_buf[SNPRINTF_BUF_LEN];
805 char cmnt_buf[SNPRINTF_BUF_LEN];
807 /* get both Proj's */
808 proj1 = get_proj(irn, pn_Cond_true);
809 assert(proj1 && "CondJmp without true Proj");
811 proj2 = get_proj(irn, pn_Cond_false);
812 assert(proj2 && "CondJmp without false Proj");
814 /* for now, the code works for scheduled and non-schedules blocks */
815 block = get_nodes_block(irn);
817 /* we have a block schedule */
818 next_bl = next_blk_sched(block);
820 if (get_cfop_target_block(proj1) == next_bl) {
821 /* exchange both proj's so the second one can be omitted */
822 const ir_node *t = proj1;
827 /* the first Proj must always be created */
828 if (get_Proj_proj(proj1) == pn_Cond_true) {
829 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
830 get_cmp_suffix(get_ia32_pncode(irn), !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
831 get_cfop_target(proj1, buf));
832 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == TRUE */");
835 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "j%s %s",
836 get_cmp_suffix(get_negated_pnc(get_ia32_pncode(irn), mode),
837 !mode_is_signed(get_irn_mode(get_irn_n(irn, 0)))),
838 get_cfop_target(proj1, buf));
839 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* cmp(a, b) == FALSE */");
843 /* the second Proj might be a fallthrough */
844 if (get_cfop_target_block(proj2) != next_bl) {
845 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(proj2, buf));
846 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* otherwise */");
850 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(proj2, buf));
856 * Emits code for conditional jump.
858 static void CondJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
860 char cmd_buf[SNPRINTF_BUF_LEN];
861 char cmnt_buf[SNPRINTF_BUF_LEN];
863 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
864 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
866 finish_CondJmp(F, irn, get_ia32_res_mode(irn));
870 * Emits code for conditional jump with two variables.
872 static void emit_ia32_CondJmp(const ir_node *irn, ia32_emit_env_t *env) {
873 CondJmp_emitter(irn, env);
877 * Emits code for conditional test and jump.
879 static void TestJmp_emitter(const ir_node *irn, ia32_emit_env_t *env) {
881 #define IA32_IS_IMMOP (is_ia32_ImmConst(irn) || is_ia32_ImmSymConst(irn))
884 const char *op1 = arch_register_get_name(get_in_reg(irn, 0));
885 const char *op2 = IA32_IS_IMMOP ? get_ia32_cnst(irn) : NULL;
886 char cmd_buf[SNPRINTF_BUF_LEN];
887 char cmnt_buf[SNPRINTF_BUF_LEN];
890 op2 = arch_register_get_name(get_in_reg(irn, 1));
892 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, IA32_IS_IMMOP ? " " : " %", op2);
893 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
896 finish_CondJmp(F, irn, get_ia32_res_mode(irn));
902 * Emits code for conditional test and jump with two variables.
904 static void emit_ia32_TestJmp(const ir_node *irn, ia32_emit_env_t *env) {
905 TestJmp_emitter(irn, env);
908 static void emit_ia32_CJmp(const ir_node *irn, ia32_emit_env_t *env) {
910 char cmd_buf[SNPRINTF_BUF_LEN];
911 char cmnt_buf[SNPRINTF_BUF_LEN];
913 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
914 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test */", irn);
916 finish_CondJmp(F, irn, get_ia32_res_mode(irn));
919 static void emit_ia32_CJmpAM(const ir_node *irn, ia32_emit_env_t *env) {
921 char cmd_buf[SNPRINTF_BUF_LEN];
922 char cmnt_buf[SNPRINTF_BUF_LEN];
924 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
925 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
927 finish_CondJmp(F, irn, get_ia32_res_mode(irn));
931 * Emits code for conditional x87 floating point jump with two variables.
933 static void emit_ia32_x87CondJmp(ir_node *irn, ia32_emit_env_t *env) {
935 char cmd_buf[SNPRINTF_BUF_LEN];
936 char cmnt_buf[SNPRINTF_BUF_LEN];
937 ia32_attr_t *attr = get_ia32_attr(irn);
938 const char *reg = attr->x87[1]->name;
939 const char *instr = "fcom";
942 switch (get_ia32_pncode(irn)) {
943 case iro_ia32_fcomrJmp:
945 case iro_ia32_fcomJmp:
949 case iro_ia32_fcomrpJmp:
951 case iro_ia32_fcompJmp:
954 case iro_ia32_fcomrppJmp:
956 case iro_ia32_fcomppJmp:
963 set_ia32_pncode(irn, (long)get_negated_pnc(get_ia32_pncode(irn), mode_Is));
965 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s", instr, reg);
966 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
968 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "fnstsw %%ax", irn);
969 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Store x87 FPU Control Word */");
971 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "sahf");
972 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Store ah into flags */");
975 finish_CondJmp(F, irn, mode_Is);
978 static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
980 const lc_arg_env_t *arg_env = ia32_get_arg_env();
981 const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
983 char cmd_buf[SNPRINTF_BUF_LEN];
984 char cmnt_buf[SNPRINTF_BUF_LEN];
985 const arch_register_t *in1, *in2, *out;
987 out = arch_get_irn_register(env->arch_env, irn);
988 in1 = arch_get_irn_register(env->arch_env, get_irn_n(irn, 2));
989 in2 = arch_get_irn_register(env->arch_env, get_irn_n(irn, 3));
991 /* we have to emit the cmp first, because the destination register */
992 /* could be one of the compare registers */
993 if (is_ia32_CmpCMov(irn)) {
994 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %2S", irn, irn);
996 else if (is_ia32_xCmpCMov(irn)) {
997 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %1S, %2S", get_irn_n(irn, 0), irn, irn);
999 else if (is_ia32_PsiCondCMov(irn)) {
1000 /* omit compare because flags are already set by And/Or */
1001 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1004 assert(0 && "unsupported CMov");
1006 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
1009 if (REGS_ARE_EQUAL(out, in2)) {
1010 /* best case: default in == out -> do nothing */
1012 else if (REGS_ARE_EQUAL(out, in1)) {
1013 /* true in == out -> need complement compare and exchange true and default in */
1014 ir_node *t = get_irn_n(irn, 2);
1015 set_irn_n(irn, 2, get_irn_n(irn, 3));
1016 set_irn_n(irn, 3, t);
1018 cmp_suffix = get_cmp_suffix(get_inversed_pnc(get_ia32_pncode(irn)), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
1022 /* out is different from in: need copy default -> out */
1023 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %4S", irn, irn);
1024 lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* copy default -> out */" );
1028 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmov%s %1D, %3S", cmp_suffix, irn, irn);
1029 lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* condition is true case */" );
1033 static void emit_ia32_CmpCMov(ir_node *irn, ia32_emit_env_t *env) {
1034 CMov_emitter(irn, env);
1037 static void emit_ia32_PsiCondCMov(ir_node *irn, ia32_emit_env_t *env) {
1038 CMov_emitter(irn, env);
1041 static void emit_ia32_xCmpCMov(ir_node *irn, ia32_emit_env_t *env) {
1042 CMov_emitter(irn, env);
1045 static void Set_emitter(ir_node *irn, ia32_emit_env_t *env) {
1047 const lc_arg_env_t *arg_env = ia32_get_arg_env();
1048 const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
1049 const char *instr = "xor";
1050 const char *reg8bit;
1052 char cmd_buf[SNPRINTF_BUF_LEN];
1053 char cmnt_buf[SNPRINTF_BUF_LEN];
1054 const arch_register_t *out;
1056 out = arch_get_irn_register(env->arch_env, irn);
1057 reg8bit = ia32_get_mapped_reg_name(env->isa->regs_8bit, out);
1059 if (env->isa->opt_arch == arch_pentium_4) {
1060 /* P4 prefers sub r, r, others xor r, r */
1064 /* in case of a PsiCondSet use mov because it doesn't affect the eflags */
1065 if (is_ia32_PsiCondSet(irn)) {
1066 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "mov %%%s, 0", arch_register_get_name(out));
1069 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %%%s, %%%s", instr, arch_register_get_name(out), arch_register_get_name(out));
1072 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* clear target as set modifies only lower 8 bit */");
1075 if (is_ia32_CmpSet(irn)) {
1076 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
1078 else if (is_ia32_xCmpSet(irn)) {
1079 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", get_irn_n(irn, 0), ia32_emit_binop(irn, env));
1081 else if (is_ia32_PsiCondSet(irn)) {
1082 /* omit compare because flags are already set by And/Or */
1083 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1086 assert(0 && "unsupported Set");
1088 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* calculate Psi condition */" );
1091 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "set%s %%%s", cmp_suffix, reg8bit);
1092 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* set 1 iff true, 0 otherweise */" );
1096 static void emit_ia32_CmpSet(ir_node *irn, ia32_emit_env_t *env) {
1097 Set_emitter(irn, env);
1100 static void emit_ia32_PsiCondSet(ir_node *irn, ia32_emit_env_t *env) {
1101 Set_emitter(irn, env);
1104 static void emit_ia32_xCmpSet(ir_node *irn, ia32_emit_env_t *env) {
1105 Set_emitter(irn, env);
1108 static void emit_ia32_xCmp(ir_node *irn, ia32_emit_env_t *env) {
1110 const lc_arg_env_t *arg_env = ia32_get_arg_env();
1112 char cmd_buf[SNPRINTF_BUF_LEN];
1113 char cmnt_buf[SNPRINTF_BUF_LEN];
1115 switch (get_ia32_pncode(irn)) {
1116 case pn_Cmp_Leg: /* odered */
1119 case pn_Cmp_Uo: /* unordered */
1122 case pn_Cmp_Ue: /* == */
1125 case pn_Cmp_Ul: /* < */
1128 case pn_Cmp_Ule: /* <= */
1131 case pn_Cmp_Ug: /* > */
1134 case pn_Cmp_Uge: /* >= */
1137 case pn_Cmp_Ne: /* != */
1142 assert(sse_pnc >= 0 && "unsupported floating point compare");
1144 lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmps%M %s, %d", irn, ia32_emit_binop(irn, env), sse_pnc);
1145 lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* SSE compare with result in %1D */", irn);
1149 /*********************************************************
1152 * ___ _ __ ___ _| |_ _ _ _ _ __ ___ _ __ ___
1153 * / _ \ '_ ` _ \| | __| | | | | | '_ ` _ \| '_ \/ __|
1154 * | __/ | | | | | | |_ | | |_| | | | | | | |_) \__ \
1155 * \___|_| |_| |_|_|\__| | |\__,_|_| |_| |_| .__/|___/
1158 *********************************************************/
1160 /* jump table entry (target and corresponding number) */
1161 typedef struct _branch_t {
1166 /* jump table for switch generation */
1167 typedef struct _jmp_tbl_t {
1168 ir_node *defProj; /**< default target */
1169 int min_value; /**< smallest switch case */
1170 int max_value; /**< largest switch case */
1171 int num_branches; /**< number of jumps */
1172 char *label; /**< label of the jump table */
1173 branch_t *branches; /**< jump array */
1177 * Compare two variables of type branch_t. Used to sort all switch cases
1179 static int ia32_cmp_branch_t(const void *a, const void *b) {
1180 branch_t *b1 = (branch_t *)a;
1181 branch_t *b2 = (branch_t *)b;
1183 if (b1->value <= b2->value)
1190 * Emits code for a SwitchJmp (creates a jump table if
1191 * possible otherwise a cmp-jmp cascade). Port from
1194 static void emit_ia32_SwitchJmp(const ir_node *irn, ia32_emit_env_t *emit_env) {
1195 unsigned long interval;
1196 char buf[SNPRINTF_BUF_LEN];
1197 int last_value, i, pn;
1200 const ir_edge_t *edge;
1201 const lc_arg_env_t *env = ia32_get_arg_env();
1202 FILE *F = emit_env->out;
1203 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1205 /* fill the table structure */
1206 tbl.label = xmalloc(SNPRINTF_BUF_LEN);
1207 tbl.label = get_unique_label(tbl.label, SNPRINTF_BUF_LEN, "JMPTBL_");
1209 tbl.num_branches = get_irn_n_edges(irn);
1210 tbl.branches = xcalloc(tbl.num_branches, sizeof(tbl.branches[0]));
1211 tbl.min_value = INT_MAX;
1212 tbl.max_value = INT_MIN;
1215 /* go over all proj's and collect them */
1216 foreach_out_edge(irn, edge) {
1217 proj = get_edge_src_irn(edge);
1218 assert(is_Proj(proj) && "Only proj allowed at SwitchJmp");
1220 pn = get_Proj_proj(proj);
1222 /* create branch entry */
1223 tbl.branches[i].target = proj;
1224 tbl.branches[i].value = pn;
1226 tbl.min_value = pn < tbl.min_value ? pn : tbl.min_value;
1227 tbl.max_value = pn > tbl.max_value ? pn : tbl.max_value;
1229 /* check for default proj */
1230 if (pn == get_ia32_pncode(irn)) {
1231 assert(tbl.defProj == NULL && "found two defProjs at SwitchJmp");
1238 /* sort the branches by their number */
1239 qsort(tbl.branches, tbl.num_branches, sizeof(tbl.branches[0]), ia32_cmp_branch_t);
1241 /* two-complement's magic make this work without overflow */
1242 interval = tbl.max_value - tbl.min_value;
1244 /* emit the table */
1245 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %u", irn, interval);
1246 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* compare for switch */");
1249 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "ja %s", get_cfop_target(tbl.defProj, buf));
1250 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default jump if out of range */");
1253 if (tbl.num_branches > 1) {
1256 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "jmp %s[%1S*4]", tbl.label, irn);
1257 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* get jump table entry as target */");
1260 ia32_switch_section(F, SECTION_RODATA);
1261 fprintf(F, "\t.align 4\n");
1263 fprintf(F, "%s:\n", tbl.label);
1265 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[0].target, buf));
1266 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", tbl.branches[0].value);
1269 last_value = tbl.branches[0].value;
1270 for (i = 1; i < tbl.num_branches; ++i) {
1271 while (++last_value < tbl.branches[i].value) {
1272 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.defProj, buf));
1273 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* default case */");
1276 snprintf(cmd_buf, SNPRINTF_BUF_LEN, ".long %s", get_cfop_target(tbl.branches[i].target, buf));
1277 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* case %d */", last_value);
1280 ia32_switch_section(F, SECTION_TEXT);
1283 /* one jump is enough */
1284 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(tbl.branches[0].target, buf));
1285 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* only one case given */");
1296 * Emits code for a unconditional jump.
1298 static void emit_Jmp(const ir_node *irn, ia32_emit_env_t *env) {
1299 ir_node *block, *next_bl;
1301 char buf[SNPRINTF_BUF_LEN], cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1303 /* for now, the code works for scheduled and non-schedules blocks */
1304 block = get_nodes_block(irn);
1306 /* we have a block schedule */
1307 next_bl = next_blk_sched(block);
1308 if (get_cfop_target_block(irn) != next_bl) {
1309 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "jmp %s", get_cfop_target(irn, buf));
1310 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F) */", irn, get_cfop_target_block(irn));
1314 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* fallthrough %s */", get_cfop_target(irn, buf));
1319 /****************************
1322 * _ __ _ __ ___ _ ___
1323 * | '_ \| '__/ _ \| |/ __|
1324 * | |_) | | | (_) | |\__ \
1325 * | .__/|_| \___/| ||___/
1328 ****************************/
1331 * Emits code for a proj -> node
1333 static void emit_Proj(const ir_node *irn, ia32_emit_env_t *env) {
1334 ir_node *pred = get_Proj_pred(irn);
1336 if (get_irn_op(pred) == op_Start) {
1337 switch(get_Proj_proj(irn)) {
1338 case pn_Start_X_initial_exec:
1347 /**********************************
1350 * | | ___ _ __ _ _| |_) |
1351 * | | / _ \| '_ \| | | | _ <
1352 * | |___| (_) | |_) | |_| | |_) |
1353 * \_____\___/| .__/ \__, |____/
1356 **********************************/
1359 * Emit movsb/w instructions to make mov count divideable by 4
1361 static void emit_CopyB_prolog(FILE *F, int rem, int size) {
1362 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1364 fprintf(F, "\t/* memcopy %d bytes*/\n", size);
1366 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cld");
1367 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* copy direction forward*/");
1372 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
1373 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 1 */");
1376 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
1377 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 2 */");
1380 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsb");
1381 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
1383 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsw");
1384 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy remainder 3 */");
1392 * Emit rep movsd instruction for memcopy.
1394 static void emit_ia32_CopyB(const ir_node *irn, ia32_emit_env_t *emit_env) {
1395 FILE *F = emit_env->out;
1396 tarval *tv = get_ia32_Immop_tarval(irn);
1397 int rem = get_tarval_long(tv);
1398 ir_node *size_node = get_irn_n(irn, 2);
1400 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1402 /* beware: size_node could be a be_Copy to fulfill constraints for ecx */
1403 size_node = be_is_Copy(size_node) ? be_get_Copy_op(size_node) : size_node;
1404 size = get_tarval_long(get_ia32_Immop_tarval(size_node));
1406 emit_CopyB_prolog(F, rem, size);
1408 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "rep movsd");
1409 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy */");
1414 * Emits unrolled memcopy.
1416 static void emit_ia32_CopyB_i(const ir_node *irn, ia32_emit_env_t *emit_env) {
1417 tarval *tv = get_ia32_Immop_tarval(irn);
1418 int size = get_tarval_long(tv);
1419 FILE *F = emit_env->out;
1420 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1422 emit_CopyB_prolog(F, size & 0x3, size);
1426 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "movsd");
1427 snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* memcopy unrolled */");
1434 /***************************
1438 * | | / _ \| '_ \ \ / /
1439 * | |___| (_) | | | \ V /
1440 * \_____\___/|_| |_|\_/
1442 ***************************/
1445 * Emit code for conversions (I, FP), (FP, I) and (FP, FP).
1447 static void emit_ia32_Conv_with_FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1448 FILE *F = emit_env->out;
1449 const lc_arg_env_t *env = ia32_get_arg_env();
1450 ir_mode *src_mode = get_ia32_src_mode(irn);
1451 ir_mode *tgt_mode = get_ia32_tgt_mode(irn);
1452 char *from, *to, buf[64];
1453 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1455 from = mode_is_float(src_mode) ? (get_mode_size_bits(src_mode) == 32 ? "ss" : "sd") : "si";
1456 to = mode_is_float(tgt_mode) ? (get_mode_size_bits(tgt_mode) == 32 ? "ss" : "sd") : "si";
1458 switch(get_ia32_op_type(irn)) {
1460 lc_esnprintf(env, buf, sizeof(buf), "%1D, %3S", irn, irn);
1462 case ia32_AddrModeS:
1463 lc_esnprintf(env, buf, sizeof(buf), "%1D, %s", irn, ia32_emit_am(irn, emit_env));
1466 assert(0 && "unsupported op type for Conv");
1469 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cvt%s2%s %s", from, to, buf);
1470 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%+F, %+F) */", irn, src_mode, tgt_mode);
1474 static void emit_ia32_Conv_I2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1475 emit_ia32_Conv_with_FP(irn, emit_env);
1478 static void emit_ia32_Conv_FP2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1479 emit_ia32_Conv_with_FP(irn, emit_env);
1482 static void emit_ia32_Conv_FP2FP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1483 emit_ia32_Conv_with_FP(irn, emit_env);
1487 * Emits code for an Int conversion.
1489 static void emit_ia32_Conv_I2I(const ir_node *irn, ia32_emit_env_t *emit_env) {
1490 FILE *F = emit_env->out;
1491 const lc_arg_env_t *env = ia32_get_arg_env();
1492 char *move_cmd = "movzx";
1493 char *conv_cmd = NULL;
1494 ir_mode *src_mode = get_ia32_src_mode(irn);
1495 ir_mode *tgt_mode = get_ia32_tgt_mode(irn);
1497 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1498 const arch_register_t *in_reg, *out_reg;
1500 n = get_mode_size_bits(src_mode);
1501 m = get_mode_size_bits(tgt_mode);
1503 if (mode_is_signed(n < m ? src_mode : tgt_mode)) {
1505 if (n == 8 || m == 8)
1507 else if (n == 16 || m == 16)
1510 assert(0 && "unsupported Conv_I2I");
1513 switch(get_ia32_op_type(irn)) {
1515 in_reg = get_in_reg(irn, 2);
1516 out_reg = get_out_reg(irn, 0);
1518 if (REGS_ARE_EQUAL(in_reg, &ia32_gp_regs[REG_EAX]) &&
1519 REGS_ARE_EQUAL(out_reg, in_reg) &&
1520 mode_is_signed(n < m ? src_mode : tgt_mode))
1522 /* argument and result are both in EAX and */
1523 /* signedness is ok: -> use converts */
1524 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s", conv_cmd);
1526 else if (REGS_ARE_EQUAL(out_reg, in_reg) &&
1527 ! mode_is_signed(n < m ? src_mode : tgt_mode))
1529 /* argument and result are in the same register */
1530 /* and signedness is ok: -> use and with mask */
1531 int mask = (1 << (n < m ? n : m)) - 1;
1532 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "and %1D, 0x%x", irn, mask);
1535 /* use move w/o sign extension */
1536 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %%%s",
1537 move_cmd, irn, ia32_get_reg_name_for_mode(emit_env, n < m ? src_mode : tgt_mode, in_reg));
1541 case ia32_AddrModeS:
1542 lc_esnprintf(env, cmd_buf, SNPRINTF_BUF_LEN, "%s %1D, %s",
1543 move_cmd, irn, ia32_emit_am(irn, emit_env));
1546 assert(0 && "unsupported op type for Conv");
1549 lc_esnprintf(env, cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%d Bit mode_%F -> %d Bit mode_%F) */",
1550 irn, n, src_mode, m, tgt_mode);
1556 * Emits code for an 8Bit Int conversion.
1558 void emit_ia32_Conv_I2I8Bit(const ir_node *irn, ia32_emit_env_t *emit_env) {
1559 emit_ia32_Conv_I2I(irn, emit_env);
1563 /*******************************************
1566 * | |__ ___ _ __ ___ __| | ___ ___
1567 * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
1568 * | |_) | __/ | | | (_) | (_| | __/\__ \
1569 * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
1571 *******************************************/
1574 * Emits a backend call
1576 static void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
1577 FILE *F = emit_env->out;
1578 entity *ent = be_Call_get_entity(irn);
1579 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1582 snprintf(cmd_buf, SNPRINTF_BUF_LEN, "call %s", get_entity_ld_name(ent));
1585 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "%1D", get_irn_n(irn, be_pos_Call_ptr));
1588 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (be_Call) */", irn);
1594 * Emits code to increase stack pointer.
1596 static void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1597 FILE *F = emit_env->out;
1598 unsigned offs = be_get_IncSP_offset(irn);
1599 be_stack_dir_t dir = be_get_IncSP_direction(irn);
1600 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1603 if (dir == be_stack_dir_expand)
1604 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "sub %1S, %u", irn, offs);
1606 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S, %u", irn, offs);
1607 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (IncSP) */", irn);
1610 snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
1611 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* omitted %+F (IncSP) with 0 */", irn);
1618 * Emits code to set stack pointer.
1620 static void emit_be_SetSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
1621 FILE *F = emit_env->out;
1622 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1624 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %3S", irn, irn);
1625 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (restore SP) */", irn);
1630 * Emits code for Copy.
1632 static void emit_be_Copy(const ir_node *irn, ia32_emit_env_t *emit_env) {
1633 FILE *F = emit_env->out;
1634 const arch_env_t *aenv = emit_env->arch_env;
1635 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1637 if (REGS_ARE_EQUAL(arch_get_irn_register(aenv, irn), arch_get_irn_register(aenv, be_get_Copy_op(irn))) ||
1638 be_is_unknown_reg(arch_get_irn_register(aenv, be_get_Copy_op(irn))))
1641 if (mode_is_float(get_irn_mode(irn)))
1642 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "movs%M %1D, %1S", irn, irn, irn);
1644 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "mov %1D, %1S", irn, irn);
1645 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
1650 * Emits code for exchange.
1652 static void emit_be_Perm(const ir_node *irn, ia32_emit_env_t *emit_env) {
1653 FILE *F = emit_env->out;
1654 char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
1656 lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "xchg %1S, %2S", irn, irn);
1657 lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F(%1A, %2A) */", irn, irn, irn);
1662 * Emits code for Constant loading.
1664 static void emit_ia32_Const(const ir_node *n, ia32_emit_env_t *env) {
1666 char cmd_buf[256], cmnt_buf[256];
1667 const lc_arg_env_t *arg_env = ia32_get_arg_env();
1669 if (get_ia32_Immop_tarval(n) == get_tarval_null(get_irn_mode(n))) {
1670 const char *instr = "xor";
1671 if (env->isa->opt_arch == arch_pentium_4) {
1672 /* P4 prefers sub r, r, others xor r, r */
1675 lc_esnprintf(arg_env, cmd_buf, 256, "%s %1D, %1D ", instr, n, n);
1676 lc_esnprintf(arg_env, cmnt_buf, 256, "/* optimized mov 0 to register */");
1679 if (get_ia32_op_type(n) == ia32_SymConst) {
1680 lc_esnprintf(arg_env, cmd_buf, 256, "mov %1D, OFFSET FLAT:%C ", n, n);
1681 lc_esnprintf(arg_env, cmnt_buf, 256, "/* Move address of SymConst into register */");
1684 lc_esnprintf(arg_env, cmd_buf, 256, "mov %1D, %C ", n, n);
1685 lc_esnprintf(arg_env, cmnt_buf, 256, "/* Mov Const into register */");
1688 lc_efprintf(arg_env, F, "\t%-35s %-60s /* %+F (%+G) */\n", cmd_buf, cmnt_buf, n, n);
1691 static void emit_be_Return(const ir_node *n, ia32_emit_env_t *env) {
1693 const lc_arg_env_t *arg_env = ia32_get_arg_env();
1695 lc_efprintf(arg_env, F, "\t%-35s %-60s /* %+F (%+G) */\n", "ret", "/* be_Return */", n, n);
1700 /***********************************************************************************
1703 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
1704 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
1705 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
1706 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
1708 ***********************************************************************************/
1711 * Enters the emitter functions for handled nodes into the generic
1712 * pointer of an opcode.
1714 static void ia32_register_emitters(void) {
1716 #define IA32_EMIT2(a,b) op_ia32_##a->ops.generic = (op_func)emit_ia32_##b
1717 #define IA32_EMIT(a) IA32_EMIT2(a,a)
1718 #define EMIT(a) op_##a->ops.generic = (op_func)emit_##a
1719 #define BE_EMIT(a) op_be_##a->ops.generic = (op_func)emit_be_##a
1721 /* first clear the generic function pointer for all ops */
1722 clear_irp_opcodes_generic_func();
1724 /* register all emitter functions defined in spec */
1725 ia32_register_spec_emitters();
1727 /* other ia32 emitter functions */
1733 IA32_EMIT(PsiCondCMov);
1735 IA32_EMIT(PsiCondSet);
1736 IA32_EMIT(SwitchJmp);
1739 IA32_EMIT(Conv_I2FP);
1740 IA32_EMIT(Conv_FP2I);
1741 IA32_EMIT(Conv_FP2FP);
1742 IA32_EMIT(Conv_I2I);
1743 IA32_EMIT(Conv_I2I8Bit);
1747 IA32_EMIT(xCmpCMov);
1748 IA32_EMIT2(fcomJmp, x87CondJmp);
1749 IA32_EMIT2(fcompJmp, x87CondJmp);
1750 IA32_EMIT2(fcomppJmp, x87CondJmp);
1751 IA32_EMIT2(fcomrJmp, x87CondJmp);
1752 IA32_EMIT2(fcomrpJmp, x87CondJmp);
1753 IA32_EMIT2(fcomrppJmp, x87CondJmp);
1755 /* benode emitter */
1774 * Emits code for a node.
1776 static void ia32_emit_node(const ir_node *irn, void *env) {
1777 ia32_emit_env_t *emit_env = env;
1778 FILE *F = emit_env->out;
1779 ir_op *op = get_irn_op(irn);
1780 DEBUG_ONLY(firm_dbg_module_t *mod = emit_env->mod;)
1782 DBG((mod, LEVEL_1, "emitting code for %+F\n", irn));
1784 if (op->ops.generic) {
1785 void (*emit)(const ir_node *, void *) = (void (*)(const ir_node *, void *))op->ops.generic;
1789 ir_fprintf(F, "\t%35s /* %+F (%+G) */\n", " ", irn, irn);
1794 * Emits gas alignment directives
1796 static void ia32_emit_alignment(FILE *F, unsigned align, unsigned skip) {
1797 fprintf(F, "\t.p2align %u,,%u\n", align, skip);
1801 * Emits gas alignment directives for Functions depended on cpu architecture.
1803 static void ia32_emit_align_func(FILE *F, cpu_support cpu) {
1804 unsigned align; unsigned maximum_skip;
1806 /* gcc doesn't emit alignment for p4 ?*/
1807 if (cpu == arch_pentium_4)
1812 align = 2; maximum_skip = 3;
1815 align = 4; maximum_skip = 15;
1818 align = 5; maximum_skip = 31;
1821 align = 4; maximum_skip = 15;
1823 ia32_emit_alignment(F, align, maximum_skip);
1827 * Emits gas alignment directives for Labels depended on cpu architecture.
1829 static void ia32_emit_align_label(FILE *F, cpu_support cpu) {
1830 unsigned align; unsigned maximum_skip;
1832 /* gcc doesn't emit alignment for p4 ?*/
1833 if (cpu == arch_pentium_4)
1838 align = 2; maximum_skip = 3;
1841 align = 4; maximum_skip = 15;
1844 align = 5; maximum_skip = 7;
1847 align = 4; maximum_skip = 7;
1849 ia32_emit_alignment(F, align, maximum_skip);
1853 * Walks over the nodes in a block connected by scheduling edges
1854 * and emits code for each node.
1856 static void ia32_gen_block(ir_node *block, void *env) {
1857 ia32_emit_env_t *emit_env = env;
1859 int need_label = block != get_irg_start_block(get_irn_irg(block));
1861 if (! is_Block(block))
1864 if (need_label && (emit_env->cg->opt & IA32_OPT_EXTBB)) {
1865 /* if the extended block scheduler is used, only leader blocks need
1867 need_label = (block == get_extbb_leader(get_nodes_extbb(block)));
1871 ia32_emit_align_label(emit_env->out, emit_env->isa->opt_arch);
1872 fprintf(emit_env->out, BLOCK_PREFIX("%ld:\n"), get_irn_node_nr(block));
1875 sched_foreach(block, irn) {
1876 ia32_emit_node(irn, env);
1881 * Emits code for function start.
1883 static void ia32_emit_func_prolog(FILE *F, ir_graph *irg, cpu_support cpu) {
1884 entity *irg_ent = get_irg_entity(irg);
1885 const char *irg_name = get_entity_ld_name(irg_ent);
1888 ia32_switch_section(F, SECTION_TEXT);
1889 ia32_emit_align_func(F, cpu);
1890 if (get_entity_visibility(irg_ent) == visibility_external_visible) {
1891 fprintf(F, ".globl %s\n", irg_name);
1893 ia32_dump_function_object(F, irg_name);
1894 fprintf(F, "%s:\n", irg_name);
1898 * Emits code for function end
1900 static void ia32_emit_func_epilog(FILE *F, ir_graph *irg) {
1901 const char *irg_name = get_entity_ld_name(get_irg_entity(irg));
1903 ia32_dump_function_size(F, irg_name);
1909 * Sets labels for control flow nodes (jump target)
1910 * TODO: Jump optimization
1912 static void ia32_gen_labels(ir_node *block, void *env) {
1914 int n = get_Block_n_cfgpreds(block);
1916 for (n--; n >= 0; n--) {
1917 pred = get_Block_cfgpred(block, n);
1918 set_irn_link(pred, block);
1923 * Main driver. Emits the code for one routine.
1925 void ia32_gen_routine(FILE *F, ir_graph *irg, const ia32_code_gen_t *cg) {
1926 ia32_emit_env_t emit_env;
1930 emit_env.arch_env = cg->arch_env;
1932 emit_env.isa = (ia32_isa_t *)cg->arch_env->isa;
1933 FIRM_DBG_REGISTER(emit_env.mod, "firm.be.ia32.emitter");
1935 /* set the global arch_env (needed by print hooks) */
1936 arch_env = cg->arch_env;
1938 ia32_register_emitters();
1940 ia32_emit_func_prolog(F, irg, emit_env.isa->opt_arch);
1941 irg_block_walk_graph(irg, ia32_gen_labels, NULL, &emit_env);
1943 if ((cg->opt & IA32_OPT_EXTBB) && cg->blk_sched) {
1944 int i, n = ARR_LEN(cg->blk_sched);
1946 for (i = 0; i < n;) {
1949 block = cg->blk_sched[i];
1951 next_bl = i < n ? cg->blk_sched[i] : NULL;
1953 /* set here the link. the emitter expects to find the next block here */
1954 set_irn_link(block, next_bl);
1955 ia32_gen_block(block, &emit_env);
1959 /* "normal" block schedule: Note the get_next_block() returns the NUMBER of the block
1960 in the block schedule. As this number should NEVER be equal the next block,
1961 we does not need a clear block link here. */
1962 irg_walk_blkwise_graph(irg, NULL, ia32_gen_block, &emit_env);
1965 ia32_emit_func_epilog(F, irg);