2 * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief The main sparc backend driver file.
23 * @author Hannes Rapp, Matthias Braun
29 #include "lc_opts_enum.h"
37 #include "iroptimize.h"
42 #include "lower_calls.h"
50 #include "../bearch.h"
51 #include "../benode.h"
52 #include "../belower.h"
53 #include "../besched.h"
55 #include "../bemachine.h"
56 #include "../bemodule.h"
58 #include "../bespillslots.h"
59 #include "../begnuas.h"
60 #include "../belistsched.h"
61 #include "../beflags.h"
63 #include "bearch_sparc_t.h"
65 #include "sparc_new_nodes.h"
66 #include "gen_sparc_regalloc_if.h"
67 #include "sparc_transform.h"
68 #include "sparc_emitter.h"
70 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
72 static arch_irn_class_t sparc_classify(const ir_node *node)
75 return arch_irn_class_none;
78 static ir_entity *sparc_get_frame_entity(const ir_node *node)
80 if (is_sparc_FrameAddr(node)) {
81 const sparc_attr_t *attr = get_sparc_attr_const(node);
82 return attr->immediate_value_entity;
85 if (sparc_has_load_store_attr(node)) {
86 const sparc_load_store_attr_t *load_store_attr
87 = get_sparc_load_store_attr_const(node);
88 if (load_store_attr->is_frame_entity) {
89 return load_store_attr->base.immediate_value_entity;
97 * This function is called by the generic backend to correct offsets for
98 * nodes accessing the stack.
100 static void sparc_set_frame_offset(ir_node *node, int offset)
102 sparc_attr_t *attr = get_sparc_attr(node);
103 attr->immediate_value += offset;
105 /* must be a FrameAddr or a load/store node with frame_entity */
106 assert(is_sparc_FrameAddr(node) ||
107 get_sparc_load_store_attr_const(node)->is_frame_entity);
110 static int sparc_get_sp_bias(const ir_node *node)
112 if (is_sparc_Save(node)) {
113 const sparc_attr_t *attr = get_sparc_attr_const(node);
114 if (get_irn_arity(node) == 3)
115 panic("no support for _reg variant yet");
117 /* Note we do not report the change of the SPARC_MIN_STACKSIZE
118 * size, since we have additional magic in the emitter which
119 * calculates that! */
120 assert(attr->immediate_value <= -SPARC_MIN_STACKSIZE);
121 return attr->immediate_value + SPARC_MIN_STACKSIZE;
122 } else if (is_sparc_RestoreZero(node)) {
123 return SP_BIAS_RESET;
128 /* fill register allocator interface */
130 const arch_irn_ops_t sparc_irn_ops = {
132 sparc_get_frame_entity,
133 sparc_set_frame_offset,
135 NULL, /* get_inverse */
136 NULL, /* get_op_estimated_cost */
137 NULL, /* possible_memory_operand */
138 NULL, /* perform_memory_operand */
142 * Transforms the standard firm graph into
145 static void sparc_prepare_graph(ir_graph *irg)
147 sparc_transform_graph(irg);
150 static bool sparc_modifies_flags(const ir_node *node)
152 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_flags;
155 static bool sparc_modifies_fp_flags(const ir_node *node)
157 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_fp_flags;
160 static void sparc_before_ra(ir_graph *irg)
162 /* fixup flags register */
163 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_flags_class],
164 NULL, sparc_modifies_flags);
165 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_fpflags_class],
166 NULL, sparc_modifies_fp_flags);
170 * transform reload node => load
172 static void transform_Reload(ir_node *node)
174 ir_node *block = get_nodes_block(node);
175 dbg_info *dbgi = get_irn_dbg_info(node);
176 ir_node *ptr = get_irn_n(node, n_be_Spill_frame);
177 ir_node *mem = get_irn_n(node, n_be_Reload_mem);
178 ir_mode *mode = get_irn_mode(node);
179 ir_entity *entity = be_get_frame_entity(node);
180 const arch_register_t *reg;
184 ir_node *sched_point = sched_prev(node);
186 load = new_bd_sparc_Ld_imm(dbgi, block, ptr, mem, mode, entity, 0, true);
187 sched_add_after(sched_point, load);
190 proj = new_rd_Proj(dbgi, load, mode, pn_sparc_Ld_res);
192 reg = arch_get_irn_register(node);
193 arch_set_irn_register(proj, reg);
195 exchange(node, proj);
199 * transform spill node => store
201 static void transform_Spill(ir_node *node)
203 ir_node *block = get_nodes_block(node);
204 dbg_info *dbgi = get_irn_dbg_info(node);
205 ir_node *ptr = get_irn_n(node, n_be_Spill_frame);
206 ir_graph *irg = get_irn_irg(node);
207 ir_node *mem = get_irg_no_mem(irg);
208 ir_node *val = get_irn_n(node, n_be_Spill_val);
209 ir_mode *mode = get_irn_mode(val);
210 ir_entity *entity = be_get_frame_entity(node);
211 ir_node *sched_point;
214 sched_point = sched_prev(node);
215 store = new_bd_sparc_St_imm(dbgi, block, val, ptr, mem, mode, entity, 0, true);
217 sched_add_after(sched_point, store);
219 exchange(node, store);
223 * walker to transform be_Spill and be_Reload nodes
225 static void sparc_after_ra_walker(ir_node *block, void *data)
227 ir_node *node, *prev;
230 for (node = sched_last(block); !sched_is_begin(node); node = prev) {
231 prev = sched_prev(node);
233 if (be_is_Reload(node)) {
234 transform_Reload(node);
235 } else if (be_is_Spill(node)) {
236 transform_Spill(node);
241 static void sparc_collect_frame_entity_nodes(ir_node *node, void *data)
243 be_fec_env_t *env = (be_fec_env_t*)data;
247 const sparc_load_store_attr_t *attr;
249 if (be_is_Reload(node) && be_get_frame_entity(node) == NULL) {
250 mode = get_irn_mode(node);
251 align = get_mode_size_bytes(mode);
252 be_node_needs_frame_entity(env, node, mode, align);
256 if (!is_sparc_Ld(node) && !is_sparc_Ldf(node))
259 attr = get_sparc_load_store_attr_const(node);
260 entity = attr->base.immediate_value_entity;
261 mode = attr->load_store_mode;
264 if (!attr->is_frame_entity)
266 if (arch_irn_get_flags(node) & sparc_arch_irn_flag_needs_64bit_spillslot)
268 align = get_mode_size_bytes(mode);
269 be_node_needs_frame_entity(env, node, mode, align);
272 static void sparc_set_frame_entity(ir_node *node, ir_entity *entity)
274 if (is_be_node(node)) {
275 be_node_set_frame_entity(node, entity);
277 /* we only say be_node_needs_frame_entity on nodes with load_store
278 * attributes, so this should be fine */
279 sparc_load_store_attr_t *attr = get_sparc_load_store_attr(node);
280 assert(attr->is_frame_entity);
281 assert(attr->base.immediate_value_entity == NULL);
282 attr->base.immediate_value_entity = entity;
286 static void sparc_after_ra(ir_graph *irg)
288 be_stack_layout_t *stack_layout = be_get_irg_stack_layout(irg);
289 bool at_begin = stack_layout->sp_relative ? true : false;
290 be_fec_env_t *fec_env = be_new_frame_entity_coalescer(irg);
292 irg_walk_graph(irg, NULL, sparc_collect_frame_entity_nodes, fec_env);
293 be_assign_entities(fec_env, sparc_set_frame_entity, at_begin);
294 be_free_frame_entity_coalescer(fec_env);
296 irg_block_walk_graph(irg, NULL, sparc_after_ra_walker, NULL);
298 sparc_introduce_prolog_epilog(irg);
301 static void sparc_init_graph(ir_graph *irg)
306 extern const arch_isa_if_t sparc_isa_if;
307 static sparc_isa_t sparc_isa_template = {
309 &sparc_isa_if, /* isa interface implementation */
314 &sparc_registers[REG_SP], /* stack pointer register */
315 &sparc_registers[REG_FRAME_POINTER],/* base pointer register */
316 &sparc_reg_classes[CLASS_sparc_gp], /* link pointer register class */
317 3, /* power of two stack alignment
319 NULL, /* main environment */
320 7, /* costs for a spill instruction */
321 5, /* costs for a reload instruction */
322 true, /* custom abi handling */
324 NULL, /* constants */
328 * rewrite unsigned->float conversion.
329 * Sparc has no instruction for this so instead we do the following:
331 * int signed_x = unsigned_value_x;
332 * double res = signed_x;
334 * res += 4294967296. ;
335 * return (float) res;
337 static void rewrite_unsigned_float_Conv(ir_node *node)
339 ir_graph *irg = get_irn_irg(node);
340 dbg_info *dbgi = get_irn_dbg_info(node);
341 ir_node *lower_block = get_nodes_block(node);
346 ir_node *block = get_nodes_block(node);
347 ir_node *unsigned_x = get_Conv_op(node);
348 ir_mode *mode_u = get_irn_mode(unsigned_x);
349 ir_mode *mode_s = find_signed_mode(mode_u);
350 ir_mode *mode_d = mode_D;
351 ir_node *signed_x = new_rd_Conv(dbgi, block, unsigned_x, mode_s);
352 ir_node *res = new_rd_Conv(dbgi, block, signed_x, mode_d);
353 ir_node *zero = new_r_Const(irg, get_mode_null(mode_s));
354 ir_node *cmp = new_rd_Cmp(dbgi, block, signed_x, zero,
356 ir_node *cond = new_rd_Cond(dbgi, block, cmp);
357 ir_node *proj_true = new_r_Proj(cond, mode_X, pn_Cond_true);
358 ir_node *proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
359 ir_node *in_true[1] = { proj_true };
360 ir_node *in_false[1] = { proj_false };
361 ir_node *true_block = new_r_Block(irg, ARRAY_SIZE(in_true), in_true);
362 ir_node *false_block = new_r_Block(irg, ARRAY_SIZE(in_false),in_false);
363 ir_node *true_jmp = new_r_Jmp(true_block);
364 ir_node *false_jmp = new_r_Jmp(false_block);
365 ir_tarval *correction = new_tarval_from_double(4294967296., mode_d);
366 ir_node *c_const = new_r_Const(irg, correction);
367 ir_node *fadd = new_rd_Add(dbgi, true_block, res, c_const,
370 ir_node *lower_in[2] = { true_jmp, false_jmp };
371 ir_node *phi_in[2] = { fadd, res };
372 ir_mode *dest_mode = get_irn_mode(node);
376 set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
377 phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, mode_d);
378 assert(get_Block_phis(lower_block) == NULL);
379 set_Block_phis(lower_block, phi);
380 set_Phi_next(phi, NULL);
382 res_conv = new_rd_Conv(dbgi, lower_block, phi, dest_mode);
384 exchange(node, res_conv);
388 static int sparc_rewrite_Conv(ir_node *node, void *ctx)
390 ir_mode *to_mode = get_irn_mode(node);
391 ir_node *op = get_Conv_op(node);
392 ir_mode *from_mode = get_irn_mode(op);
395 if (mode_is_float(to_mode) && mode_is_int(from_mode)
396 && get_mode_size_bits(from_mode) == 32
397 && !mode_is_signed(from_mode)) {
398 rewrite_unsigned_float_Conv(node);
405 static void sparc_handle_intrinsics(void)
407 ir_type *tp, *int_tp, *uint_tp;
409 size_t n_records = 0;
411 runtime_rt rt_iMod, rt_uMod;
413 #define ID(x) new_id_from_chars(x, sizeof(x)-1)
415 int_tp = new_type_primitive(mode_Is);
416 uint_tp = new_type_primitive(mode_Iu);
418 /* we need to rewrite some forms of int->float conversions */
420 i_instr_record *map_Conv = &records[n_records++].i_instr;
422 map_Conv->kind = INTRINSIC_INSTR;
423 map_Conv->op = op_Conv;
424 map_Conv->i_mapper = sparc_rewrite_Conv;
426 /* SPARC has no signed mod instruction ... */
428 i_instr_record *map_Mod = &records[n_records++].i_instr;
430 tp = new_type_method(2, 1);
431 set_method_param_type(tp, 0, int_tp);
432 set_method_param_type(tp, 1, int_tp);
433 set_method_res_type(tp, 0, int_tp);
435 rt_iMod.ent = new_entity(get_glob_type(), ID(".rem"), tp);
436 set_entity_ld_ident(rt_iMod.ent, ID(".rem"));
437 rt_iMod.mode = mode_T;
438 rt_iMod.res_mode = mode_Is;
439 rt_iMod.mem_proj_nr = pn_Mod_M;
440 rt_iMod.regular_proj_nr = pn_Mod_X_regular;
441 rt_iMod.exc_proj_nr = pn_Mod_X_except;
442 rt_iMod.res_proj_nr = pn_Mod_res;
444 set_entity_visibility(rt_iMod.ent, ir_visibility_external);
446 map_Mod->kind = INTRINSIC_INSTR;
447 map_Mod->op = op_Mod;
448 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
449 map_Mod->ctx = &rt_iMod;
451 /* ... nor an unsigned mod. */
453 i_instr_record *map_Mod = &records[n_records++].i_instr;
455 tp = new_type_method(2, 1);
456 set_method_param_type(tp, 0, uint_tp);
457 set_method_param_type(tp, 1, uint_tp);
458 set_method_res_type(tp, 0, uint_tp);
460 rt_uMod.ent = new_entity(get_glob_type(), ID(".urem"), tp);
461 set_entity_ld_ident(rt_uMod.ent, ID(".urem"));
462 rt_uMod.mode = mode_T;
463 rt_uMod.res_mode = mode_Iu;
464 rt_uMod.mem_proj_nr = pn_Mod_M;
465 rt_uMod.regular_proj_nr = pn_Mod_X_regular;
466 rt_uMod.exc_proj_nr = pn_Mod_X_except;
467 rt_uMod.res_proj_nr = pn_Mod_res;
469 set_entity_visibility(rt_uMod.ent, ir_visibility_external);
471 map_Mod->kind = INTRINSIC_INSTR;
472 map_Mod->op = op_Mod;
473 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
474 map_Mod->ctx = &rt_uMod;
477 assert(n_records < ARRAY_SIZE(records));
478 lower_intrinsics(records, n_records, /*part_block_used=*/ true);
482 * Initializes the backend ISA
484 static arch_env_t *sparc_init(FILE *outfile)
486 sparc_isa_t *isa = XMALLOC(sparc_isa_t);
487 *isa = sparc_isa_template;
488 isa->constants = pmap_create();
490 be_emit_init(outfile);
492 sparc_register_init();
493 sparc_create_opcodes(&sparc_irn_ops);
494 sparc_handle_intrinsics();
500 * Closes the output file and frees the ISA structure.
502 static void sparc_done(void *self)
504 sparc_isa_t *isa = (sparc_isa_t*)self;
506 /* emit now all global declarations */
507 be_gas_emit_decls(isa->base.main_env);
509 pmap_destroy(isa->constants);
516 * Get the register class which shall be used to store a value of a given mode.
517 * @param self The this pointer.
518 * @param mode The mode in question.
519 * @return A register class which can hold values of the given mode.
521 static const arch_register_class_t *sparc_get_reg_class_for_mode(const ir_mode *mode)
523 if (mode_is_float(mode))
524 return &sparc_reg_classes[CLASS_sparc_fp];
526 return &sparc_reg_classes[CLASS_sparc_gp];
530 * Returns the necessary byte alignment for storing a register of given class.
532 static int sparc_get_reg_class_alignment(const arch_register_class_t *cls)
534 ir_mode *mode = arch_register_class_mode(cls);
535 return get_mode_size_bytes(mode);
538 static ir_node *sparc_create_set(ir_node *cond)
540 return ir_create_cond_set(cond, mode_Iu);
543 static void sparc_lower_for_target(void)
545 size_t i, n_irgs = get_irp_n_irgs();
546 lower_mode_b_config_t lower_mode_b_config = {
551 lower_calls_with_compounds(LF_RETURN_HIDDEN);
555 for (i = 0; i < n_irgs; ++i) {
556 ir_graph *irg = get_irp_irg(i);
557 ir_lower_mode_b(irg, &lower_mode_b_config);
558 lower_switch(irg, 4, 256, false);
562 static int sparc_is_mux_allowed(ir_node *sel, ir_node *mux_false,
565 ir_graph *irg = get_irn_irg(sel);
566 ir_mode *mode = get_irn_mode(mux_true);
568 if (get_irg_phase_state(irg) == phase_low)
571 if (!mode_is_int(mode) && !mode_is_reference(mode) && mode != mode_b)
573 if (is_Const(mux_true) && is_Const_one(mux_true) &&
574 is_Const(mux_false) && is_Const_null(mux_false))
580 * Returns the libFirm configuration parameter for this backend.
582 static const backend_params *sparc_get_backend_params(void)
584 static const ir_settings_arch_dep_t arch_dep = {
585 1, /* also_use_subs */
586 1, /* maximum_shifts */
587 31, /* highest_shift_amount */
588 NULL, /* evaluate_cost_func */
591 32, /* max_bits_for_mulh */
593 static backend_params p = {
594 0, /* no inline assembly */
595 0, /* no support for RotL nodes */
597 &arch_dep, /* will be set later */
598 sparc_is_mux_allowed, /* parameter for if conversion */
599 32, /* machine size */
600 NULL, /* float arithmetic mode */
601 128, /* size of long double */
602 0, /* no trampoline support: size 0 */
603 0, /* no trampoline support: align 0 */
604 NULL, /* no trampoline support: no trampoline builder */
605 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
610 static ir_graph **sparc_get_backend_irg_list(const void *self,
618 static asm_constraint_flags_t sparc_parse_asm_constraint(const char **c)
621 return ASM_CONSTRAINT_FLAG_INVALID;
624 static int sparc_is_valid_clobber(const char *clobber)
630 const arch_isa_if_t sparc_isa_if = {
632 sparc_lower_for_target,
634 NULL, /* handle intrinsics */
635 sparc_get_reg_class_for_mode,
637 sparc_get_reg_class_alignment,
638 sparc_get_backend_params,
639 sparc_get_backend_irg_list,
640 NULL, /* mark remat */
641 sparc_parse_asm_constraint,
642 sparc_is_valid_clobber,
645 NULL, /* get_pic_base */
646 NULL, /* before_abi */
652 NULL, /* register_saved_by */
655 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_sparc)
656 void be_init_arch_sparc(void)
658 be_register_isa_if("sparc", &sparc_isa_if);
659 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.cg");
660 sparc_init_transform();
661 sparc_init_emitter();