2 * This is the main ia32 firm backend driver.
3 * @author Christian Wuerdig
20 #include <libcore/lc_opts.h>
21 #include <libcore/lc_opts_enum.h>
22 #endif /* WITH_LIBCORE */
26 #include "pseudo_irg.h"
30 #include "iredges_t.h"
38 #include "../beabi.h" /* the general register allocator interface */
39 #include "../benode_t.h"
40 #include "../belower.h"
41 #include "../besched_t.h"
44 #include "../beirgmod.h"
45 #include "../be_dbgout.h"
46 #include "bearch_ia32_t.h"
48 #include "ia32_new_nodes.h" /* ia32 nodes interface */
49 #include "gen_ia32_regalloc_if.h" /* the generated interface (register type and class defenitions) */
50 #include "ia32_gen_decls.h" /* interface declaration emitter */
51 #include "ia32_transform.h"
52 #include "ia32_emitter.h"
53 #include "ia32_map_regs.h"
54 #include "ia32_optimize.h"
56 #include "ia32_dbg_stat.h"
57 #include "ia32_finish.h"
58 #include "ia32_util.h"
60 #define DEBUG_MODULE "firm.be.ia32.isa"
63 static set *cur_reg_set = NULL;
66 #define is_Start(irn) (get_irn_opcode(irn) == iro_Start)
68 /* Creates the unique per irg GP NoReg node. */
69 ir_node *ia32_new_NoReg_gp(ia32_code_gen_t *cg) {
70 return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_gp_regs[REG_GP_NOREG]);
73 /* Creates the unique per irg FP NoReg node. */
74 ir_node *ia32_new_NoReg_fp(ia32_code_gen_t *cg) {
75 return be_abi_get_callee_save_irn(cg->birg->abi,
76 USE_SSE2(cg) ? &ia32_xmm_regs[REG_XMM_NOREG] : &ia32_vfp_regs[REG_VFP_NOREG]);
79 /**************************************************
82 * _ __ ___ __ _ __ _| | | ___ ___ _| |_
83 * | '__/ _ \/ _` | / _` | | |/ _ \ / __| | | _|
84 * | | | __/ (_| | | (_| | | | (_) | (__ | | |
85 * |_| \___|\__, | \__,_|_|_|\___/ \___| |_|_|
88 **************************************************/
90 static ir_node *my_skip_proj(const ir_node *n) {
98 * Return register requirements for an ia32 node.
99 * If the node returns a tuple (mode_T) then the proj's
100 * will be asked for this information.
102 static const arch_register_req_t *ia32_get_irn_reg_req(const void *self, arch_register_req_t *req, const ir_node *irn, int pos) {
103 const ia32_irn_ops_t *ops = self;
104 const ia32_register_req_t *irn_req;
105 long node_pos = pos == -1 ? 0 : pos;
106 ir_mode *mode = is_Block(irn) ? NULL : get_irn_mode(irn);
107 FIRM_DBG_REGISTER(firm_dbg_module_t *mod, DEBUG_MODULE);
109 if (is_Block(irn) || mode == mode_M || mode == mode_X) {
110 DBG((mod, LEVEL_1, "ignoring Block, mode_M, mode_X node %+F\n", irn));
114 if (mode == mode_T && pos < 0) {
115 DBG((mod, LEVEL_1, "ignoring request OUT requirements for node %+F\n", irn));
119 DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
123 node_pos = ia32_translate_proj_pos(irn);
129 irn = my_skip_proj(irn);
131 DB((mod, LEVEL_1, "skipping Proj, going to %+F at pos %d ... ", irn, node_pos));
134 if (is_ia32_irn(irn)) {
136 irn_req = get_ia32_in_req(irn, pos);
139 irn_req = get_ia32_out_req(irn, node_pos);
142 DB((mod, LEVEL_1, "returning reqs for %+F at pos %d\n", irn, pos));
144 memcpy(req, &(irn_req->req), sizeof(*req));
146 if (arch_register_req_is(&(irn_req->req), should_be_same)) {
147 assert(irn_req->same_pos >= 0 && "should be same constraint for in -> out NYI");
148 req->other_same = get_irn_n(irn, irn_req->same_pos);
151 if (arch_register_req_is(&(irn_req->req), should_be_different)) {
152 assert(irn_req->different_pos >= 0 && "should be different constraint for in -> out NYI");
153 req->other_different = get_irn_n(irn, irn_req->different_pos);
157 /* treat Unknowns like Const with default requirements */
158 if (is_Unknown(irn)) {
159 DB((mod, LEVEL_1, "returning UKNWN reqs for %+F\n", irn));
160 if (mode_is_float(mode)) {
161 if (USE_SSE2(ops->cg))
162 memcpy(req, &(ia32_default_req_ia32_xmm_xmm_UKNWN), sizeof(*req));
164 memcpy(req, &(ia32_default_req_ia32_vfp_vfp_UKNWN), sizeof(*req));
166 else if (mode_is_int(mode) || mode_is_reference(mode))
167 memcpy(req, &(ia32_default_req_ia32_gp_gp_UKNWN), sizeof(*req));
168 else if (mode == mode_T || mode == mode_M) {
169 DBG((mod, LEVEL_1, "ignoring Unknown node %+F\n", irn));
173 assert(0 && "unsupported Unknown-Mode");
176 DB((mod, LEVEL_1, "returning NULL for %+F (not ia32)\n", irn));
184 static void ia32_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg) {
186 const ia32_irn_ops_t *ops = self;
188 if (get_irn_mode(irn) == mode_X) {
192 DBG((ops->cg->mod, LEVEL_1, "ia32 assigned register %s to node %+F\n", reg->name, irn));
195 pos = ia32_translate_proj_pos(irn);
196 irn = my_skip_proj(irn);
199 if (is_ia32_irn(irn)) {
200 const arch_register_t **slots;
202 slots = get_ia32_slots(irn);
206 ia32_set_firm_reg(irn, reg, cur_reg_set);
210 static const arch_register_t *ia32_get_irn_reg(const void *self, const ir_node *irn) {
212 const arch_register_t *reg = NULL;
216 if (get_irn_mode(irn) == mode_X) {
220 pos = ia32_translate_proj_pos(irn);
221 irn = my_skip_proj(irn);
224 if (is_ia32_irn(irn)) {
225 const arch_register_t **slots;
226 slots = get_ia32_slots(irn);
230 reg = ia32_get_firm_reg(irn, cur_reg_set);
236 static arch_irn_class_t ia32_classify(const void *self, const ir_node *irn) {
237 arch_irn_class_t classification = arch_irn_class_normal;
239 irn = my_skip_proj(irn);
242 classification |= arch_irn_class_branch;
244 if (! is_ia32_irn(irn))
245 return classification & ~arch_irn_class_normal;
247 if (is_ia32_Cnst(irn))
248 classification |= arch_irn_class_const;
251 classification |= arch_irn_class_load;
253 if (is_ia32_St(irn) || is_ia32_Store8Bit(irn))
254 classification |= arch_irn_class_store;
256 if (is_ia32_got_reload(irn))
257 classification |= arch_irn_class_reload;
259 return classification;
262 static arch_irn_flags_t ia32_get_flags(const void *self, const ir_node *irn) {
265 ir_node *pred = get_Proj_pred(irn);
266 if(is_ia32_Push(pred) && get_Proj_proj(irn) == pn_ia32_Push_stack) {
267 return arch_irn_flags_modify_sp;
269 if(is_ia32_Pop(pred) && get_Proj_proj(irn) == pn_ia32_Pop_stack) {
270 return arch_irn_flags_modify_sp;
272 if(is_ia32_AddSP(pred) && get_Proj_proj(irn) == pn_ia32_AddSP_stack) {
273 return arch_irn_flags_modify_sp;
277 irn = my_skip_proj(irn);
278 if (is_ia32_irn(irn))
279 return get_ia32_flags(irn);
282 return arch_irn_flags_ignore;
287 static entity *ia32_get_frame_entity(const void *self, const ir_node *irn) {
288 return is_ia32_irn(irn) ? get_ia32_frame_ent(irn) : NULL;
291 static void ia32_set_frame_entity(const void *self, ir_node *irn, entity *ent) {
292 set_ia32_frame_ent(irn, ent);
295 static void ia32_set_frame_offset(const void *self, ir_node *irn, int bias) {
297 const ia32_irn_ops_t *ops = self;
299 if (get_ia32_frame_ent(irn)) {
300 ia32_am_flavour_t am_flav = get_ia32_am_flavour(irn);
302 /* Pop nodes modify the stack pointer before calculating the destination
303 * address, so fix this here
305 if(is_ia32_Pop(irn)) {
309 DBG((ops->cg->mod, LEVEL_1, "stack biased %+F with %d\n", irn, bias));
311 snprintf(buf, sizeof(buf), "%d", bias);
313 if (get_ia32_op_type(irn) == ia32_Normal) {
314 set_ia32_cnst(irn, buf);
316 add_ia32_am_offs(irn, buf);
318 set_ia32_am_flavour(irn, am_flav);
323 static int ia32_get_sp_bias(const void *self, const ir_node *irn) {
325 int proj = get_Proj_proj(irn);
326 ir_node *pred = get_Proj_pred(irn);
328 if(is_ia32_Push(pred) && proj == 0)
330 if(is_ia32_Pop(pred) && proj == 1)
338 be_abi_call_flags_bits_t flags;
339 const arch_isa_t *isa;
340 const arch_env_t *aenv;
344 static void *ia32_abi_init(const be_abi_call_t *call, const arch_env_t *aenv, ir_graph *irg)
346 ia32_abi_env_t *env = xmalloc(sizeof(env[0]));
347 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
348 env->flags = fl.bits;
351 env->isa = aenv->isa;
356 * Put all registers which are saved by the prologue/epilogue in a set.
358 * @param self The callback object.
359 * @param s The result set.
361 static void ia32_abi_dont_save_regs(void *self, pset *s)
363 ia32_abi_env_t *env = self;
364 if(env->flags.try_omit_fp)
365 pset_insert_ptr(s, env->isa->bp);
369 * Generate the routine prologue.
371 * @param self The callback object.
372 * @param mem A pointer to the mem node. Update this if you define new memory.
373 * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
375 * @return The register which shall be used as a stack frame base.
377 * All nodes which define registers in @p reg_map must keep @p reg_map current.
379 static const arch_register_t *ia32_abi_prologue(void *self, ir_node **mem, pmap *reg_map)
381 ia32_abi_env_t *env = self;
383 if (! env->flags.try_omit_fp) {
384 ir_node *bl = get_irg_start_block(env->irg);
385 ir_node *curr_sp = be_abi_reg_map_get(reg_map, env->isa->sp);
386 ir_node *curr_bp = be_abi_reg_map_get(reg_map, env->isa->bp);
390 push = new_rd_ia32_Push(NULL, env->irg, bl, curr_sp, curr_bp, *mem);
391 curr_sp = new_r_Proj(env->irg, bl, push, get_irn_mode(curr_sp), pn_ia32_Push_stack);
392 *mem = new_r_Proj(env->irg, bl, push, mode_M, pn_ia32_Push_M);
394 /* the push must have SP out register */
395 arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
396 set_ia32_flags(push, arch_irn_flags_ignore);
398 /* move esp to ebp */
399 curr_bp = be_new_Copy(env->isa->bp->reg_class, env->irg, bl, curr_sp);
400 be_set_constr_single_reg(curr_bp, BE_OUT_POS(0), env->isa->bp);
401 arch_set_irn_register(env->aenv, curr_bp, env->isa->bp);
402 be_node_set_flags(curr_bp, BE_OUT_POS(0), arch_irn_flags_ignore);
404 /* beware: the copy must be done before any other sp use */
405 curr_sp = be_new_CopyKeep_single(env->isa->sp->reg_class, env->irg, bl, curr_sp, curr_bp, get_irn_mode(curr_sp));
406 be_set_constr_single_reg(curr_sp, BE_OUT_POS(0), env->isa->sp);
407 arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
408 be_node_set_flags(curr_sp, BE_OUT_POS(0), arch_irn_flags_ignore);
410 be_abi_reg_map_set(reg_map, env->isa->sp, curr_sp);
411 be_abi_reg_map_set(reg_map, env->isa->bp, curr_bp);
420 * Generate the routine epilogue.
421 * @param self The callback object.
422 * @param bl The block for the epilog
423 * @param mem A pointer to the mem node. Update this if you define new memory.
424 * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
425 * @return The register which shall be used as a stack frame base.
427 * All nodes which define registers in @p reg_map must keep @p reg_map current.
429 static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_map)
431 ia32_abi_env_t *env = self;
432 ir_node *curr_sp = be_abi_reg_map_get(reg_map, env->isa->sp);
433 ir_node *curr_bp = be_abi_reg_map_get(reg_map, env->isa->bp);
435 if (env->flags.try_omit_fp) {
436 /* simply remove the stack frame here */
437 curr_sp = be_new_IncSP(env->isa->sp, env->irg, bl, curr_sp, BE_STACK_FRAME_SIZE_SHRINK);
438 add_irn_dep(curr_sp, *mem);
441 const ia32_isa_t *isa = (ia32_isa_t *)env->isa;
442 ir_mode *mode_bp = env->isa->bp->reg_class->mode;
444 /* gcc always emits a leave at the end of a routine */
445 if (1 || ARCH_AMD(isa->opt_arch)) {
449 leave = new_rd_ia32_Leave(NULL, env->irg, bl, curr_sp, curr_bp);
450 set_ia32_flags(leave, arch_irn_flags_ignore);
451 curr_bp = new_r_Proj(current_ir_graph, bl, leave, mode_bp, pn_ia32_Leave_frame);
452 curr_sp = new_r_Proj(current_ir_graph, bl, leave, get_irn_mode(curr_sp), pn_ia32_Leave_stack);
453 *mem = new_r_Proj(current_ir_graph, bl, leave, mode_M, pn_ia32_Leave_M);
458 /* copy ebp to esp */
459 curr_sp = be_new_SetSP(env->isa->sp, env->irg, bl, curr_sp, curr_bp, *mem);
462 pop = new_rd_ia32_Pop(NULL, env->irg, bl, curr_sp, *mem);
463 set_ia32_flags(pop, arch_irn_flags_ignore);
464 curr_bp = new_r_Proj(current_ir_graph, bl, pop, mode_bp, pn_ia32_Pop_res);
465 curr_sp = new_r_Proj(current_ir_graph, bl, pop, get_irn_mode(curr_sp), pn_ia32_Pop_stack);
466 *mem = new_r_Proj(current_ir_graph, bl, pop, mode_M, pn_ia32_Pop_M);
468 arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
469 arch_set_irn_register(env->aenv, curr_bp, env->isa->bp);
472 be_abi_reg_map_set(reg_map, env->isa->sp, curr_sp);
473 be_abi_reg_map_set(reg_map, env->isa->bp, curr_bp);
477 * Produces the type which sits between the stack args and the locals on the stack.
478 * it will contain the return address and space to store the old base pointer.
479 * @return The Firm type modeling the ABI between type.
481 static ir_type *ia32_abi_get_between_type(void *self)
483 #define IDENT(s) new_id_from_chars(s, sizeof(s)-1)
484 static ir_type *omit_fp_between_type = NULL;
485 static ir_type *between_type = NULL;
487 ia32_abi_env_t *env = self;
489 if ( !between_type) {
491 entity *ret_addr_ent;
492 entity *omit_fp_ret_addr_ent;
494 ir_type *old_bp_type = new_type_primitive(IDENT("bp"), mode_P);
495 ir_type *ret_addr_type = new_type_primitive(IDENT("return_addr"), mode_P);
497 between_type = new_type_struct(IDENT("ia32_between_type"));
498 old_bp_ent = new_entity(between_type, IDENT("old_bp"), old_bp_type);
499 ret_addr_ent = new_entity(between_type, IDENT("ret_addr"), ret_addr_type);
501 set_entity_offset_bytes(old_bp_ent, 0);
502 set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
503 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
504 set_type_state(between_type, layout_fixed);
506 omit_fp_between_type = new_type_struct(IDENT("ia32_between_type_omit_fp"));
507 omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, IDENT("ret_addr"), ret_addr_type);
509 set_entity_offset_bytes(omit_fp_ret_addr_ent, 0);
510 set_type_size_bytes(omit_fp_between_type, get_type_size_bytes(ret_addr_type));
511 set_type_state(omit_fp_between_type, layout_fixed);
514 return env->flags.try_omit_fp ? omit_fp_between_type : between_type;
519 * Get the estimated cycle count for @p irn.
521 * @param self The this pointer.
522 * @param irn The node.
524 * @return The estimated cycle count for this operation
526 static int ia32_get_op_estimated_cost(const void *self, const ir_node *irn)
529 ia32_op_type_t op_tp;
530 const ia32_irn_ops_t *ops = self;
535 assert(is_ia32_irn(irn));
537 cost = get_ia32_latency(irn);
538 op_tp = get_ia32_op_type(irn);
540 if (is_ia32_CopyB(irn)) {
542 if (ARCH_INTEL(ops->cg->arch))
545 else if (is_ia32_CopyB_i(irn)) {
546 int size = get_tarval_long(get_ia32_Immop_tarval(irn));
547 cost = 20 + (int)ceil((4/3) * size);
548 if (ARCH_INTEL(ops->cg->arch))
551 /* in case of address mode operations add additional cycles */
552 else if (op_tp == ia32_AddrModeD || op_tp == ia32_AddrModeS) {
554 In case of stack access add 5 cycles (we assume stack is in cache),
555 other memory operations cost 20 cycles.
557 cost += is_ia32_use_frame(irn) ? 5 : 20;
564 * Returns the inverse operation if @p irn, recalculating the argument at position @p i.
566 * @param irn The original operation
567 * @param i Index of the argument we want the inverse operation to yield
568 * @param inverse struct to be filled with the resulting inverse op
569 * @param obstack The obstack to use for allocation of the returned nodes array
570 * @return The inverse operation or NULL if operation invertible
572 static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obst) {
575 ir_node *block, *noreg, *nomem;
578 /* we cannot invert non-ia32 irns */
579 if (! is_ia32_irn(irn))
582 /* operand must always be a real operand (not base, index or mem) */
583 if (i != 2 && i != 3)
586 /* we don't invert address mode operations */
587 if (get_ia32_op_type(irn) != ia32_Normal)
590 irg = get_irn_irg(irn);
591 block = get_nodes_block(irn);
592 mode = get_ia32_res_mode(irn);
593 noreg = get_irn_n(irn, 0);
594 nomem = new_r_NoMem(irg);
596 /* initialize structure */
597 inverse->nodes = obstack_alloc(obst, 2 * sizeof(inverse->nodes[0]));
601 switch (get_ia32_irn_opcode(irn)) {
603 if (get_ia32_immop_type(irn) == ia32_ImmConst) {
604 /* we have an add with a const here */
605 /* invers == add with negated const */
606 inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
607 pnc = pn_ia32_Add_res;
609 copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
610 set_ia32_Immop_tarval(inverse->nodes[0], tarval_neg(get_ia32_Immop_tarval(irn)));
611 set_ia32_commutative(inverse->nodes[0]);
613 else if (get_ia32_immop_type(irn) == ia32_ImmSymConst) {
614 /* we have an add with a symconst here */
615 /* invers == sub with const */
616 inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
617 pnc = pn_ia32_Sub_res;
619 copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
622 /* normal add: inverse == sub */
623 ir_node *proj = ia32_get_res_proj(irn);
626 inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, i ^ 1), nomem);
627 pnc = pn_ia32_Sub_res;
632 if (get_ia32_immop_type(irn) != ia32_ImmNone) {
633 /* we have a sub with a const/symconst here */
634 /* invers == add with this const */
635 inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
636 pnc = pn_ia32_Add_res;
637 inverse->costs += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
638 copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
642 ir_node *proj = ia32_get_res_proj(irn);
646 inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, 3), nomem);
649 inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, 2), proj, nomem);
651 pnc = pn_ia32_Sub_res;
656 if (get_ia32_immop_type(irn) != ia32_ImmNone) {
657 /* xor with const: inverse = xor */
658 inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
659 pnc = pn_ia32_Eor_res;
660 inverse->costs += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
661 copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
665 inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, (ir_node *)irn, get_irn_n(irn, i), nomem);
666 pnc = pn_ia32_Eor_res;
671 ir_node *proj = ia32_get_res_proj(irn);
674 inverse->nodes[0] = new_rd_ia32_Not(NULL, irg, block, noreg, noreg, proj, nomem);
675 pnc = pn_ia32_Not_res;
679 case iro_ia32_Minus: {
680 ir_node *proj = ia32_get_res_proj(irn);
683 inverse->nodes[0] = new_rd_ia32_Minus(NULL, irg, block, noreg, noreg, proj, nomem);
684 pnc = pn_ia32_Minus_res;
689 /* inverse operation not supported */
693 set_ia32_res_mode(inverse->nodes[0], mode);
694 inverse->nodes[1] = new_r_Proj(irg, block, inverse->nodes[0], mode, pnc);
700 * Check if irn can load it's operand at position i from memory (source addressmode).
701 * @param self Pointer to irn ops itself
702 * @param irn The irn to be checked
703 * @param i The operands position
704 * @return Non-Zero if operand can be loaded
706 static int ia32_possible_memory_operand(const void *self, const ir_node *irn, unsigned int i) {
707 if (! is_ia32_irn(irn) || /* must be an ia32 irn */
708 get_irn_arity(irn) != 5 || /* must be a binary operation */
709 get_ia32_op_type(irn) != ia32_Normal || /* must not already be a addressmode irn */
710 ! (get_ia32_am_support(irn) & ia32_am_Source) || /* must be capable of source addressmode */
711 (i != 2 && i != 3) || /* a "real" operand position must be requested */
712 (i == 2 && ! is_ia32_commutative(irn)) || /* if first operand requested irn must be commutative */
713 is_ia32_use_frame(irn)) /* must not already use frame */
719 static void ia32_perform_memory_operand(const void *self, ir_node *irn, ir_node *spill, unsigned int i) {
720 assert(ia32_possible_memory_operand(self, irn, i) && "Cannot perform memory operand change");
723 ir_node *tmp = get_irn_n(irn, 3);
724 set_irn_n(irn, 3, get_irn_n(irn, 2));
725 set_irn_n(irn, 2, tmp);
728 set_ia32_am_support(irn, ia32_am_Source);
729 set_ia32_op_type(irn, ia32_AddrModeS);
730 set_ia32_am_flavour(irn, ia32_B);
731 set_ia32_ls_mode(irn, get_irn_mode(get_irn_n(irn, i)));
732 //TODO this will fail, if spill is a PhiM (give PhiMs entities?)
733 set_ia32_frame_ent(irn, be_get_frame_entity(spill));
734 set_ia32_use_frame(irn);
735 set_ia32_got_reload(irn);
737 set_irn_n(irn, 0, get_irg_frame(get_irn_irg(irn)));
738 set_irn_n(irn, 4, spill);
741 Input at position one is index register, which is NoReg.
742 We would need cg object to get a real noreg, but we cannot
745 set_irn_n(irn, 3, get_irn_n(irn, 1));
747 //FIXME DBG_OPT_AM_S(reload, irn);
750 static const be_abi_callbacks_t ia32_abi_callbacks = {
753 ia32_abi_get_between_type,
754 ia32_abi_dont_save_regs,
759 /* fill register allocator interface */
761 static const arch_irn_ops_if_t ia32_irn_ops_if = {
762 ia32_get_irn_reg_req,
767 ia32_get_frame_entity,
768 ia32_set_frame_entity,
769 ia32_set_frame_offset,
772 ia32_get_op_estimated_cost,
773 ia32_possible_memory_operand,
774 ia32_perform_memory_operand,
777 ia32_irn_ops_t ia32_irn_ops = {
784 /**************************************************
787 * ___ ___ __| | ___ __ _ ___ _ __ _| |_
788 * / __/ _ \ / _` |/ _ \/ _` |/ _ \ '_ \ | | _|
789 * | (_| (_) | (_| | __/ (_| | __/ | | | | | |
790 * \___\___/ \__,_|\___|\__, |\___|_| |_| |_|_|
793 **************************************************/
795 static void ia32_kill_convs(ia32_code_gen_t *cg) {
798 /* BEWARE: the Projs are inserted in the set */
799 foreach_nodeset(cg->kill_conv, irn) {
800 ir_node *in = get_irn_n(get_Proj_pred(irn), 2);
801 edges_reroute(irn, in, cg->birg->irg);
806 * Transform the Thread Local Store base.
808 static void transform_tls(ir_graph *irg) {
809 ir_node *irn = get_irg_tls(irg);
812 dbg_info *dbg = get_irn_dbg_info(irn);
813 ir_node *blk = get_nodes_block(irn);
815 newn = new_rd_ia32_LdTls(dbg, irg, blk, get_irn_mode(irn));
822 * Transforms the standard firm graph into
825 static void ia32_prepare_graph(void *self) {
826 ia32_code_gen_t *cg = self;
827 dom_front_info_t *dom;
828 DEBUG_ONLY(firm_dbg_module_t *old_mod = cg->mod;)
830 FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.transform");
832 /* 1st: transform constants and psi condition trees */
833 ia32_pre_transform_phase(cg);
835 /* 2nd: transform all remaining nodes */
836 ia32_register_transformers();
837 dom = be_compute_dominance_frontiers(cg->irg);
839 cg->kill_conv = new_nodeset(5);
840 transform_tls(cg->irg);
841 irg_walk_blkwise_graph(cg->irg, NULL, ia32_transform_node, cg);
843 del_nodeset(cg->kill_conv);
845 be_free_dominance_frontiers(dom);
848 be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
850 /* 3rd: optimize address mode */
851 FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.am");
852 ia32_optimize_addressmode(cg);
855 be_dump(cg->irg, "-am", dump_ir_block_graph_sched);
857 DEBUG_ONLY(cg->mod = old_mod;)
861 * Dummy functions for hooks we don't need but which must be filled.
863 static void ia32_before_sched(void *self) {
866 static void remove_unused_nodes(ir_node *irn, bitset_t *already_visited) {
874 mode = get_irn_mode(irn);
876 /* check if we already saw this node or the node has more than one user */
877 if (bitset_contains_irn(already_visited, irn) || get_irn_n_edges(irn) > 1)
880 /* mark irn visited */
881 bitset_add_irn(already_visited, irn);
883 /* non-Tuple nodes with one user: ok, return */
884 if (get_irn_n_edges(irn) >= 1 && mode != mode_T)
887 /* tuple node has one user which is not the mem proj-> ok */
888 if (mode == mode_T && get_irn_n_edges(irn) == 1) {
889 mem_proj = ia32_get_proj_for_mode(irn, mode_M);
894 for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
895 ir_node *pred = get_irn_n(irn, i);
897 /* do not follow memory edges or we will accidentally remove stores */
898 if (is_Proj(pred) && get_irn_mode(pred) == mode_M)
901 set_irn_n(irn, i, new_Bad());
904 The current node is about to be removed: if the predecessor
905 has only this node as user, it need to be removed as well.
907 if (get_irn_n_edges(pred) <= 1)
908 remove_unused_nodes(pred, already_visited);
911 if (sched_is_scheduled(irn)) {
912 set_irn_n(irn, 0, new_Bad());
913 set_irn_n(irn, 1, new_Bad());
914 set_irn_n(irn, 2, new_Bad());
919 static void remove_unused_loads_walker(ir_node *irn, void *env) {
920 bitset_t *already_visited = env;
921 if (is_ia32_Ld(irn) && ! bitset_contains_irn(already_visited, irn))
922 remove_unused_nodes(irn, env);
926 * Called before the register allocator.
927 * Calculate a block schedule here. We need it for the x87
928 * simulator and the emitter.
930 static void ia32_before_ra(void *self) {
931 ia32_code_gen_t *cg = self;
932 bitset_t *already_visited = bitset_irg_malloc(cg->irg);
936 There are sometimes unused loads, only pinned by memory.
937 We need to remove those Loads and all other nodes which won't be used
938 after removing the Load from schedule.
940 irg_walk_graph(cg->irg, remove_unused_loads_walker, NULL, already_visited);
941 bitset_free(already_visited);
946 * Transforms a be node into a Load.
948 static void transform_to_Load(ia32_transform_env_t *env) {
949 ir_node *irn = env->irn;
950 entity *ent = be_get_frame_entity(irn);
951 ir_mode *mode = env->mode;
952 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
953 ir_node *nomem = new_rd_NoMem(env->irg);
954 ir_node *sched_point = NULL;
955 ir_node *ptr = get_irn_n(irn, 0);
956 ir_node *mem = be_is_Reload(irn) ? get_irn_n(irn, 1) : nomem;
957 ir_node *new_op, *proj;
958 const arch_register_t *reg;
960 if (sched_is_scheduled(irn)) {
961 sched_point = sched_prev(irn);
964 if (mode_is_float(mode)) {
965 if (USE_SSE2(env->cg))
966 new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem);
968 new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem);
971 new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem);
974 set_ia32_am_support(new_op, ia32_am_Source);
975 set_ia32_op_type(new_op, ia32_AddrModeS);
976 set_ia32_am_flavour(new_op, ia32_B);
977 set_ia32_ls_mode(new_op, mode);
978 set_ia32_frame_ent(new_op, ent);
979 set_ia32_use_frame(new_op);
981 DBG_OPT_RELOAD2LD(irn, new_op);
983 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, pn_Load_res);
986 sched_add_after(sched_point, new_op);
987 sched_add_after(new_op, proj);
992 /* copy the register from the old node to the new Load */
993 reg = arch_get_irn_register(env->cg->arch_env, irn);
994 arch_set_irn_register(env->cg->arch_env, new_op, reg);
996 SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
1002 * Transforms a be node into a Store.
1004 static void transform_to_Store(ia32_transform_env_t *env) {
1005 ir_node *irn = env->irn;
1006 entity *ent = be_get_frame_entity(irn);
1007 ir_mode *mode = env->mode;
1008 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
1009 ir_node *nomem = new_rd_NoMem(env->irg);
1010 ir_node *ptr = get_irn_n(irn, 0);
1011 ir_node *val = get_irn_n(irn, 1);
1012 ir_node *new_op, *proj;
1013 ir_node *sched_point = NULL;
1015 if (sched_is_scheduled(irn)) {
1016 sched_point = sched_prev(irn);
1019 if (mode_is_float(mode)) {
1020 if (USE_SSE2(env->cg))
1021 new_op = new_rd_ia32_xStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
1023 new_op = new_rd_ia32_vfst(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
1025 else if (get_mode_size_bits(mode) == 8) {
1026 new_op = new_rd_ia32_Store8Bit(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
1029 new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
1032 set_ia32_am_support(new_op, ia32_am_Dest);
1033 set_ia32_op_type(new_op, ia32_AddrModeD);
1034 set_ia32_am_flavour(new_op, ia32_B);
1035 set_ia32_ls_mode(new_op, mode);
1036 set_ia32_frame_ent(new_op, ent);
1037 set_ia32_use_frame(new_op);
1039 DBG_OPT_SPILL2ST(irn, new_op);
1041 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode_M, pn_ia32_Store_M);
1044 sched_add_after(sched_point, new_op);
1048 SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
1050 exchange(irn, proj);
1053 static ir_node *create_push(ia32_transform_env_t *env, ir_node *schedpoint, ir_node *sp, ir_node *mem, entity *ent, const char *offset) {
1054 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
1056 ir_node *push = new_rd_ia32_Push(env->dbg, env->irg, env->block, sp, noreg, mem);
1058 set_ia32_frame_ent(push, ent);
1059 set_ia32_use_frame(push);
1060 set_ia32_op_type(push, ia32_AddrModeS);
1061 set_ia32_am_flavour(push, ia32_B);
1062 set_ia32_ls_mode(push, mode_Is);
1064 add_ia32_am_offs(push, offset);
1066 sched_add_before(schedpoint, push);
1070 static ir_node *create_pop(ia32_transform_env_t *env, ir_node *schedpoint, ir_node *sp, entity *ent, const char *offset) {
1071 ir_node *pop = new_rd_ia32_Pop(env->dbg, env->irg, env->block, sp, new_NoMem());
1073 set_ia32_frame_ent(pop, ent);
1074 set_ia32_use_frame(pop);
1075 set_ia32_op_type(pop, ia32_AddrModeD);
1076 set_ia32_am_flavour(pop, ia32_B);
1077 set_ia32_ls_mode(pop, mode_Is);
1079 add_ia32_am_offs(pop, offset);
1081 sched_add_before(schedpoint, pop);
1086 static ir_node* create_spproj(ia32_transform_env_t *env, ir_node *pred, int pos, ir_node *schedpoint, const ir_node *oldsp) {
1087 ir_mode *spmode = get_irn_mode(oldsp);
1088 const arch_register_t *spreg = arch_get_irn_register(env->cg->arch_env, oldsp);
1091 sp = new_rd_Proj(env->dbg, env->irg, env->block, pred, spmode, pos);
1092 arch_set_irn_register(env->cg->arch_env, sp, spreg);
1093 sched_add_before(schedpoint, sp);
1098 static void transform_MemPerm(ia32_transform_env_t *env) {
1100 * Transform memperm, currently we do this the ugly way and produce
1101 * push/pop into/from memory cascades. This is possible without using
1104 ir_node *node = env->irn;
1106 ir_node *sp = get_irn_n(node, 0);
1107 const ir_edge_t *edge;
1108 const ir_edge_t *next;
1111 arity = be_get_MemPerm_entity_arity(node);
1112 pops = alloca(arity * sizeof(pops[0]));
1115 for(i = 0; i < arity; ++i) {
1116 entity *ent = be_get_MemPerm_in_entity(node, i);
1117 ir_type *enttype = get_entity_type(ent);
1118 int entbits = get_type_size_bits(enttype);
1119 ir_node *mem = get_irn_n(node, i + 1);
1122 assert( (entbits == 32 || entbits == 64) && "spillslot on x86 should be 32 or 64 bit");
1124 push = create_push(env, node, sp, mem, ent, NULL);
1125 sp = create_spproj(env, push, 0, node, sp);
1127 // add another push after the first one
1128 push = create_push(env, node, sp, mem, ent, "4");
1129 sp = create_spproj(env, push, 0, node, sp);
1132 set_irn_n(node, i, new_Bad());
1136 for(i = arity - 1; i >= 0; --i) {
1137 entity *ent = be_get_MemPerm_out_entity(node, i);
1138 ir_type *enttype = get_entity_type(ent);
1139 int entbits = get_type_size_bits(enttype);
1143 assert( (entbits == 32 || entbits == 64) && "spillslot on x86 should be 32 or 64 bit");
1145 pop = create_pop(env, node, sp, ent, NULL);
1147 // add another pop after the first one
1148 sp = create_spproj(env, pop, 1, node, sp);
1149 pop = create_pop(env, node, sp, ent, "4");
1152 sp = create_spproj(env, pop, 1, node, sp);
1158 // exchange memprojs
1159 foreach_out_edge_safe(node, edge, next) {
1160 ir_node *proj = get_edge_src_irn(edge);
1161 int p = get_Proj_proj(proj);
1165 set_Proj_pred(proj, pops[p]);
1166 set_Proj_proj(proj, 3);
1170 arity = get_irn_arity(node);
1171 for(i = 0; i < arity; ++i) {
1172 set_irn_n(node, i, new_Bad());
1178 * Fix the mode of Spill/Reload
1180 static ir_mode *fix_spill_mode(ia32_code_gen_t *cg, ir_mode *mode)
1182 if (mode_is_float(mode)) {
1194 * Block-Walker: Calls the transform functions Spill and Reload.
1196 static void ia32_after_ra_walker(ir_node *block, void *env) {
1197 ir_node *node, *prev;
1198 ia32_code_gen_t *cg = env;
1199 ia32_transform_env_t tenv;
1202 tenv.irg = current_ir_graph;
1204 DEBUG_ONLY(tenv.mod = cg->mod;)
1206 /* beware: the schedule is changed here */
1207 for (node = sched_last(block); !sched_is_begin(node); node = prev) {
1208 prev = sched_prev(node);
1209 if (be_is_Reload(node)) {
1210 /* we always reload the whole register */
1211 tenv.dbg = get_irn_dbg_info(node);
1213 tenv.mode = fix_spill_mode(cg, get_irn_mode(node));
1214 transform_to_Load(&tenv);
1216 else if (be_is_Spill(node)) {
1217 ir_node *spillval = get_irn_n(node, be_pos_Spill_val);
1218 /* we always spill the whole register */
1219 tenv.dbg = get_irn_dbg_info(node);
1221 tenv.mode = fix_spill_mode(cg, get_irn_mode(spillval));
1222 transform_to_Store(&tenv);
1224 else if(be_is_MemPerm(node)) {
1225 tenv.dbg = get_irn_dbg_info(node);
1227 transform_MemPerm(&tenv);
1233 * We transform Spill and Reload here. This needs to be done before
1234 * stack biasing otherwise we would miss the corrected offset for these nodes.
1236 * If x87 instruction should be emitted, run the x87 simulator and patch
1237 * the virtual instructions. This must obviously be done after register allocation.
1239 static void ia32_after_ra(void *self) {
1240 ia32_code_gen_t *cg = self;
1241 ir_graph *irg = cg->irg;
1243 irg_block_walk_graph(irg, NULL, ia32_after_ra_walker, cg);
1245 ia32_finish_irg(irg, cg);
1249 * Last touchups for the graph before emit
1251 static void ia32_finish(void *self) {
1252 ia32_code_gen_t *cg = self;
1253 ir_graph *irg = cg->irg;
1255 // Matze: disabled for now, as the irextbb algo sometimes returns extbb in
1256 // the wrong order if the graph has critical edges
1257 be_remove_empty_blocks(irg);
1259 cg->blk_sched = sched_create_block_schedule(cg->irg, cg->birg->execfreqs);
1261 /* if we do x87 code generation, rewrite all the virtual instructions and registers */
1262 if (cg->used_fp == fp_x87 || cg->force_sim) {
1263 x87_simulate_graph(cg->arch_env, irg, cg->blk_sched);
1266 ia32_peephole_optimization(irg, cg);
1270 * Emits the code, closes the output file and frees
1271 * the code generator interface.
1273 static void ia32_codegen(void *self) {
1274 ia32_code_gen_t *cg = self;
1275 ir_graph *irg = cg->irg;
1277 ia32_gen_routine(cg->isa->out, irg, cg);
1281 /* remove it from the isa */
1284 /* de-allocate code generator */
1285 del_set(cg->reg_set);
1289 static void *ia32_cg_init(const be_irg_t *birg);
1291 static const arch_code_generator_if_t ia32_code_gen_if = {
1293 NULL, /* before abi introduce hook */
1295 ia32_before_sched, /* before scheduling hook */
1296 ia32_before_ra, /* before register allocation hook */
1297 ia32_after_ra, /* after register allocation hook */
1298 ia32_finish, /* called before codegen */
1299 ia32_codegen /* emit && done */
1303 * Initializes a IA32 code generator.
1305 static void *ia32_cg_init(const be_irg_t *birg) {
1306 ia32_isa_t *isa = (ia32_isa_t *)birg->main_env->arch_env->isa;
1307 ia32_code_gen_t *cg = xcalloc(1, sizeof(*cg));
1309 cg->impl = &ia32_code_gen_if;
1310 cg->irg = birg->irg;
1311 cg->reg_set = new_set(ia32_cmp_irn_reg_assoc, 1024);
1312 cg->arch_env = birg->main_env->arch_env;
1315 cg->blk_sched = NULL;
1316 cg->fp_to_gp = NULL;
1317 cg->gp_to_fp = NULL;
1318 cg->fp_kind = isa->fp_kind;
1319 cg->used_fp = fp_none;
1320 cg->dump = (birg->main_env->options->dump_flags & DUMP_BE) ? 1 : 0;
1322 FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.cg");
1324 /* copy optimizations from isa for easier access */
1326 cg->arch = isa->arch;
1327 cg->opt_arch = isa->opt_arch;
1333 if (isa->name_obst_size) {
1334 //printf("freed %d bytes from name obst\n", isa->name_obst_size);
1335 isa->name_obst_size = 0;
1336 obstack_free(isa->name_obst, NULL);
1337 obstack_init(isa->name_obst);
1341 cur_reg_set = cg->reg_set;
1343 ia32_irn_ops.cg = cg;
1345 return (arch_code_generator_t *)cg;
1350 /*****************************************************************
1351 * ____ _ _ _____ _____
1352 * | _ \ | | | | |_ _|/ ____| /\
1353 * | |_) | __ _ ___| | _____ _ __ __| | | | | (___ / \
1354 * | _ < / _` |/ __| |/ / _ \ '_ \ / _` | | | \___ \ / /\ \
1355 * | |_) | (_| | (__| < __/ | | | (_| | _| |_ ____) / ____ \
1356 * |____/ \__,_|\___|_|\_\___|_| |_|\__,_| |_____|_____/_/ \_\
1358 *****************************************************************/
1361 * Set output modes for GCC
1363 static const tarval_mode_info mo_integer = {
1370 * set the tarval output mode of all integer modes to decimal
1372 static void set_tarval_output_modes(void)
1376 for (i = get_irp_n_modes() - 1; i >= 0; --i) {
1377 ir_mode *mode = get_irp_mode(i);
1379 if (mode_is_int(mode))
1380 set_tarval_mode_output_option(mode, &mo_integer);
1386 * The template that generates a new ISA object.
1387 * Note that this template can be changed by command line
1390 static ia32_isa_t ia32_isa_template = {
1392 &ia32_isa_if, /* isa interface implementation */
1393 &ia32_gp_regs[REG_ESP], /* stack pointer register */
1394 &ia32_gp_regs[REG_EBP], /* base pointer register */
1395 -1, /* stack direction */
1396 NULL, /* main environment */
1398 NULL, /* 16bit register names */
1399 NULL, /* 8bit register names */
1403 IA32_OPT_INCDEC | /* optimize add 1, sub 1 into inc/dec default: on */
1404 IA32_OPT_DOAM | /* optimize address mode default: on */
1405 IA32_OPT_LEA | /* optimize for LEAs default: on */
1406 IA32_OPT_PLACECNST | /* place constants immediately before instructions, default: on */
1407 IA32_OPT_IMMOPS | /* operations can use immediates, default: on */
1408 IA32_OPT_EXTBB), /* use extended basic block scheduling, default: on */
1409 arch_pentium_4, /* instruction architecture */
1410 arch_pentium_4, /* optimize for architecture */
1411 fp_sse2, /* use sse2 unit */
1412 NULL, /* current code generator */
1413 NULL, /* output file */
1415 NULL, /* name obstack */
1416 0 /* name obst size */
1421 * Initializes the backend ISA.
1423 static void *ia32_init(FILE *file_handle) {
1424 static int inited = 0;
1430 set_tarval_output_modes();
1432 isa = xmalloc(sizeof(*isa));
1433 memcpy(isa, &ia32_isa_template, sizeof(*isa));
1435 ia32_register_init(isa);
1436 ia32_create_opcodes();
1438 if ((ARCH_INTEL(isa->arch) && isa->arch < arch_pentium_4) ||
1439 (ARCH_AMD(isa->arch) && isa->arch < arch_athlon))
1440 /* no SSE2 for these cpu's */
1441 isa->fp_kind = fp_x87;
1443 if (ARCH_INTEL(isa->opt_arch) && isa->opt_arch >= arch_pentium_4) {
1444 /* Pentium 4 don't like inc and dec instructions */
1445 isa->opt &= ~IA32_OPT_INCDEC;
1448 isa->regs_16bit = pmap_create();
1449 isa->regs_8bit = pmap_create();
1450 isa->types = pmap_create();
1451 isa->tv_ent = pmap_create();
1452 isa->out = file_handle;
1454 ia32_build_16bit_reg_map(isa->regs_16bit);
1455 ia32_build_8bit_reg_map(isa->regs_8bit);
1457 /* patch register names of x87 registers */
1459 ia32_st_regs[0].name = "st";
1460 ia32_st_regs[1].name = "st(1)";
1461 ia32_st_regs[2].name = "st(2)";
1462 ia32_st_regs[3].name = "st(3)";
1463 ia32_st_regs[4].name = "st(4)";
1464 ia32_st_regs[5].name = "st(5)";
1465 ia32_st_regs[6].name = "st(6)";
1466 ia32_st_regs[7].name = "st(7)";
1470 isa->name_obst = xmalloc(sizeof(*isa->name_obst));
1471 obstack_init(isa->name_obst);
1472 isa->name_obst_size = 0;
1475 ia32_handle_intrinsics();
1476 ia32_switch_section(isa->out, NO_SECTION);
1477 fprintf(isa->out, "\t.intel_syntax\n");
1479 /* needed for the debug support */
1480 ia32_switch_section(isa->out, SECTION_TEXT);
1481 fprintf(isa->out, ".Ltext0:\n");
1491 * Closes the output file and frees the ISA structure.
1493 static void ia32_done(void *self) {
1494 ia32_isa_t *isa = self;
1496 /* emit now all global declarations */
1497 ia32_gen_decls(isa->out, isa->arch_isa.main_env);
1499 pmap_destroy(isa->regs_16bit);
1500 pmap_destroy(isa->regs_8bit);
1501 pmap_destroy(isa->tv_ent);
1502 pmap_destroy(isa->types);
1505 //printf("name obst size = %d bytes\n", isa->name_obst_size);
1506 obstack_free(isa->name_obst, NULL);
1514 * Return the number of register classes for this architecture.
1515 * We report always these:
1516 * - the general purpose registers
1517 * - the SSE floating point register set
1518 * - the virtual floating point registers
1520 static int ia32_get_n_reg_class(const void *self) {
1525 * Return the register class for index i.
1527 static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
1528 assert(i >= 0 && i < 3 && "Invalid ia32 register class requested.");
1530 return &ia32_reg_classes[CLASS_ia32_gp];
1532 return &ia32_reg_classes[CLASS_ia32_xmm];
1534 return &ia32_reg_classes[CLASS_ia32_vfp];
1538 * Get the register class which shall be used to store a value of a given mode.
1539 * @param self The this pointer.
1540 * @param mode The mode in question.
1541 * @return A register class which can hold values of the given mode.
1543 const arch_register_class_t *ia32_get_reg_class_for_mode(const void *self, const ir_mode *mode) {
1544 const ia32_isa_t *isa = self;
1545 if (mode_is_float(mode)) {
1546 return USE_SSE2(isa) ? &ia32_reg_classes[CLASS_ia32_xmm] : &ia32_reg_classes[CLASS_ia32_vfp];
1549 return &ia32_reg_classes[CLASS_ia32_gp];
1553 * Get the ABI restrictions for procedure calls.
1554 * @param self The this pointer.
1555 * @param method_type The type of the method (procedure) in question.
1556 * @param abi The abi object to be modified
1558 static void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
1559 const ia32_isa_t *isa = self;
1562 unsigned cc = get_method_calling_convention(method_type);
1563 int n = get_method_n_params(method_type);
1566 int i, ignore_1, ignore_2;
1568 const arch_register_t *reg;
1569 be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
1571 unsigned use_push = !IS_P6_ARCH(isa->opt_arch);
1573 /* set abi flags for calls */
1574 call_flags.bits.left_to_right = 0; /* always last arg first on stack */
1575 call_flags.bits.store_args_sequential = use_push;
1576 /* call_flags.bits.try_omit_fp not changed: can handle both settings */
1577 call_flags.bits.fp_free = 0; /* the frame pointer is fixed in IA32 */
1578 call_flags.bits.call_has_imm = 1; /* IA32 calls can have immediate address */
1580 /* set stack parameter passing style */
1581 be_abi_call_set_flags(abi, call_flags, &ia32_abi_callbacks);
1583 /* collect the mode for each type */
1584 modes = alloca(n * sizeof(modes[0]));
1586 for (i = 0; i < n; i++) {
1587 tp = get_method_param_type(method_type, i);
1588 modes[i] = get_type_mode(tp);
1591 /* set register parameters */
1592 if (cc & cc_reg_param) {
1593 /* determine the number of parameters passed via registers */
1594 biggest_n = ia32_get_n_regparam_class(n, modes, &ignore_1, &ignore_2);
1596 /* loop over all parameters and set the register requirements */
1597 for (i = 0; i <= biggest_n; i++) {
1598 reg = ia32_get_RegParam_reg(n, modes, i, cc);
1599 assert(reg && "kaputt");
1600 be_abi_call_param_reg(abi, i, reg);
1607 /* set stack parameters */
1608 for (i = stack_idx; i < n; i++) {
1609 be_abi_call_param_stack(abi, i, 1, 0, 0);
1613 /* set return registers */
1614 n = get_method_n_ress(method_type);
1616 assert(n <= 2 && "more than two results not supported");
1618 /* In case of 64bit returns, we will have two 32bit values */
1620 tp = get_method_res_type(method_type, 0);
1621 mode = get_type_mode(tp);
1623 assert(!mode_is_float(mode) && "two FP results not supported");
1625 tp = get_method_res_type(method_type, 1);
1626 mode = get_type_mode(tp);
1628 assert(!mode_is_float(mode) && "two FP results not supported");
1630 be_abi_call_res_reg(abi, 0, &ia32_gp_regs[REG_EAX]);
1631 be_abi_call_res_reg(abi, 1, &ia32_gp_regs[REG_EDX]);
1634 const arch_register_t *reg;
1636 tp = get_method_res_type(method_type, 0);
1637 assert(is_atomic_type(tp));
1638 mode = get_type_mode(tp);
1640 reg = mode_is_float(mode) ?
1641 (USE_SSE2(isa) ? &ia32_xmm_regs[REG_XMM0] : &ia32_vfp_regs[REG_VF0]) :
1642 &ia32_gp_regs[REG_EAX];
1644 be_abi_call_res_reg(abi, 0, reg);
1649 static const void *ia32_get_irn_ops(const arch_irn_handler_t *self, const ir_node *irn) {
1650 return &ia32_irn_ops;
1653 const arch_irn_handler_t ia32_irn_handler = {
1657 const arch_irn_handler_t *ia32_get_irn_handler(const void *self) {
1658 return &ia32_irn_handler;
1661 int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
1662 return is_ia32_irn(irn) ? 1 : -1;
1666 * Initializes the code generator interface.
1668 static const arch_code_generator_if_t *ia32_get_code_generator_if(void *self) {
1669 return &ia32_code_gen_if;
1673 * Returns the estimated execution time of an ia32 irn.
1675 static sched_timestep_t ia32_sched_exectime(void *env, const ir_node *irn) {
1676 const arch_env_t *arch_env = env;
1677 return is_ia32_irn(irn) ? ia32_get_op_estimated_cost(arch_get_irn_ops(arch_env, irn), irn) : 1;
1680 list_sched_selector_t ia32_sched_selector;
1683 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
1685 static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self, list_sched_selector_t *selector) {
1686 memcpy(&ia32_sched_selector, selector, sizeof(ia32_sched_selector));
1687 ia32_sched_selector.exectime = ia32_sched_exectime;
1688 ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
1689 return &ia32_sched_selector;
1693 * Returns the necessary byte alignment for storing a register of given class.
1695 static int ia32_get_reg_class_alignment(const void *self, const arch_register_class_t *cls) {
1696 ir_mode *mode = arch_register_class_mode(cls);
1697 int bytes = get_mode_size_bytes(mode);
1699 if (mode_is_float(mode) && bytes > 8)
1704 static ia32_intrinsic_env_t intrinsic_env = { NULL, NULL };
1707 * Returns the libFirm configuration parameter for this backend.
1709 static const backend_params *ia32_get_libfirm_params(void) {
1710 static const arch_dep_params_t ad = {
1711 1, /* also use subs */
1712 4, /* maximum shifts */
1713 31, /* maximum shift amount */
1715 1, /* allow Mulhs */
1716 1, /* allow Mulus */
1717 32 /* Mulh allowed up to 32 bit */
1719 static backend_params p = {
1720 NULL, /* no additional opcodes */
1721 NULL, /* will be set later */
1722 1, /* need dword lowering */
1723 ia32_create_intrinsic_fkt,
1724 &intrinsic_env, /* context for ia32_create_intrinsic_fkt */
1732 /* instruction set architectures. */
1733 static const lc_opt_enum_int_items_t arch_items[] = {
1734 { "386", arch_i386, },
1735 { "486", arch_i486, },
1736 { "pentium", arch_pentium, },
1737 { "586", arch_pentium, },
1738 { "pentiumpro", arch_pentium_pro, },
1739 { "686", arch_pentium_pro, },
1740 { "pentiummmx", arch_pentium_mmx, },
1741 { "pentium2", arch_pentium_2, },
1742 { "p2", arch_pentium_2, },
1743 { "pentium3", arch_pentium_3, },
1744 { "p3", arch_pentium_3, },
1745 { "pentium4", arch_pentium_4, },
1746 { "p4", arch_pentium_4, },
1747 { "pentiumm", arch_pentium_m, },
1748 { "pm", arch_pentium_m, },
1749 { "core", arch_core, },
1751 { "athlon", arch_athlon, },
1752 { "athlon64", arch_athlon_64, },
1753 { "opteron", arch_opteron, },
1757 static lc_opt_enum_int_var_t arch_var = {
1758 &ia32_isa_template.arch, arch_items
1761 static lc_opt_enum_int_var_t opt_arch_var = {
1762 &ia32_isa_template.opt_arch, arch_items
1765 static const lc_opt_enum_int_items_t fp_unit_items[] = {
1767 { "sse2", fp_sse2 },
1771 static lc_opt_enum_int_var_t fp_unit_var = {
1772 &ia32_isa_template.fp_kind, fp_unit_items
1775 static const lc_opt_enum_int_items_t gas_items[] = {
1776 { "linux", ASM_LINUX_GAS },
1777 { "mingw", ASM_MINGW_GAS },
1781 static lc_opt_enum_int_var_t gas_var = {
1782 (int *)&asm_flavour, gas_items
1785 static const lc_opt_table_entry_t ia32_options[] = {
1786 LC_OPT_ENT_ENUM_INT("arch", "select the instruction architecture", &arch_var),
1787 LC_OPT_ENT_ENUM_INT("opt", "optimize for instruction architecture", &opt_arch_var),
1788 LC_OPT_ENT_ENUM_INT("fpunit", "select the floating point unit", &fp_unit_var),
1789 LC_OPT_ENT_NEGBIT("noaddrmode", "do not use address mode", &ia32_isa_template.opt, IA32_OPT_DOAM),
1790 LC_OPT_ENT_NEGBIT("nolea", "do not optimize for LEAs", &ia32_isa_template.opt, IA32_OPT_LEA),
1791 LC_OPT_ENT_NEGBIT("noplacecnst", "do not place constants", &ia32_isa_template.opt, IA32_OPT_PLACECNST),
1792 LC_OPT_ENT_NEGBIT("noimmop", "no operations with immediates", &ia32_isa_template.opt, IA32_OPT_IMMOPS),
1793 LC_OPT_ENT_NEGBIT("noextbb", "do not use extended basic block scheduling", &ia32_isa_template.opt, IA32_OPT_EXTBB),
1794 LC_OPT_ENT_ENUM_INT("gasmode", "set the GAS compatibility mode", &gas_var),
1799 * Register command line options for the ia32 backend.
1803 * ia32-arch=arch create instruction for arch
1804 * ia32-opt=arch optimize for run on arch
1805 * ia32-fpunit=unit select floating point unit (x87 or SSE2)
1806 * ia32-incdec optimize for inc/dec
1807 * ia32-noaddrmode do not use address mode
1808 * ia32-nolea do not optimize for LEAs
1809 * ia32-noplacecnst do not place constants,
1810 * ia32-noimmop no operations with immediates
1811 * ia32-noextbb do not use extended basic block scheduling
1812 * ia32-gasmode set the GAS compatibility mode
1814 static void ia32_register_options(lc_opt_entry_t *ent)
1816 lc_opt_entry_t *be_grp_ia32 = lc_opt_get_grp(ent, "ia32");
1817 lc_opt_add_table(be_grp_ia32, ia32_options);
1819 #endif /* WITH_LIBCORE */
1821 const arch_isa_if_t ia32_isa_if = {
1824 ia32_get_n_reg_class,
1826 ia32_get_reg_class_for_mode,
1828 ia32_get_irn_handler,
1829 ia32_get_code_generator_if,
1830 ia32_get_list_sched_selector,
1831 ia32_get_reg_class_alignment,
1832 ia32_get_libfirm_params,
1834 ia32_register_options