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"
49 #include "../bearch.h"
50 #include "../benode.h"
51 #include "../belower.h"
52 #include "../besched.h"
54 #include "../bemachine.h"
55 #include "../bemodule.h"
57 #include "../bespillslots.h"
58 #include "../begnuas.h"
59 #include "../belistsched.h"
60 #include "../beflags.h"
62 #include "bearch_sparc_t.h"
64 #include "sparc_new_nodes.h"
65 #include "gen_sparc_regalloc_if.h"
66 #include "sparc_transform.h"
67 #include "sparc_emitter.h"
69 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
71 static arch_irn_class_t sparc_classify(const ir_node *node)
74 return arch_irn_class_none;
77 static ir_entity *sparc_get_frame_entity(const ir_node *node)
79 if (is_sparc_FrameAddr(node)) {
80 const sparc_attr_t *attr = get_sparc_attr_const(node);
81 return attr->immediate_value_entity;
84 if (sparc_has_load_store_attr(node)) {
85 const sparc_load_store_attr_t *load_store_attr
86 = get_sparc_load_store_attr_const(node);
87 if (load_store_attr->is_frame_entity) {
88 return load_store_attr->base.immediate_value_entity;
96 * This function is called by the generic backend to correct offsets for
97 * nodes accessing the stack.
99 static void sparc_set_frame_offset(ir_node *node, int offset)
101 sparc_attr_t *attr = get_sparc_attr(node);
102 attr->immediate_value += offset;
104 /* must be a FrameAddr or a load/store node with frame_entity */
105 assert(is_sparc_FrameAddr(node) ||
106 get_sparc_load_store_attr_const(node)->is_frame_entity);
109 static int sparc_get_sp_bias(const ir_node *node)
111 if (is_sparc_Save(node)) {
112 const sparc_attr_t *attr = get_sparc_attr_const(node);
113 if (get_irn_arity(node) == 3)
114 panic("no support for _reg variant yet");
116 /* Note we do not report the change of the SPARC_MIN_STACKSIZE
117 * size, since we have additional magic in the emitter which
118 * calculates that! */
119 assert(attr->immediate_value <= -SPARC_MIN_STACKSIZE);
120 return attr->immediate_value + SPARC_MIN_STACKSIZE;
121 } else if (is_sparc_RestoreZero(node)) {
122 return SP_BIAS_RESET;
127 /* fill register allocator interface */
129 const arch_irn_ops_t sparc_irn_ops = {
131 sparc_get_frame_entity,
132 sparc_set_frame_offset,
134 NULL, /* get_inverse */
135 NULL, /* get_op_estimated_cost */
136 NULL, /* possible_memory_operand */
137 NULL, /* perform_memory_operand */
141 * Transforms the standard firm graph into
144 static void sparc_prepare_graph(ir_graph *irg)
146 sparc_transform_graph(irg);
149 static bool sparc_modifies_flags(const ir_node *node)
151 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_flags;
154 static bool sparc_modifies_fp_flags(const ir_node *node)
156 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_fp_flags;
159 static void sparc_before_ra(ir_graph *irg)
161 /* fixup flags register */
162 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_flags_class],
163 NULL, sparc_modifies_flags);
164 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_fpflags_class],
165 NULL, sparc_modifies_fp_flags);
169 * transform reload node => load
171 static void transform_Reload(ir_node *node)
173 ir_node *block = get_nodes_block(node);
174 dbg_info *dbgi = get_irn_dbg_info(node);
175 ir_node *ptr = get_irn_n(node, n_be_Spill_frame);
176 ir_node *mem = get_irn_n(node, n_be_Reload_mem);
177 ir_mode *mode = get_irn_mode(node);
178 ir_entity *entity = be_get_frame_entity(node);
179 const arch_register_t *reg;
183 ir_node *sched_point = sched_prev(node);
185 load = new_bd_sparc_Ld_imm(dbgi, block, ptr, mem, mode, entity, 0, true);
186 sched_add_after(sched_point, load);
189 proj = new_rd_Proj(dbgi, load, mode, pn_sparc_Ld_res);
191 reg = arch_get_irn_register(node);
192 arch_set_irn_register(proj, reg);
194 exchange(node, proj);
198 * transform spill node => store
200 static void transform_Spill(ir_node *node)
202 ir_node *block = get_nodes_block(node);
203 dbg_info *dbgi = get_irn_dbg_info(node);
204 ir_node *ptr = get_irn_n(node, n_be_Spill_frame);
205 ir_graph *irg = get_irn_irg(node);
206 ir_node *mem = get_irg_no_mem(irg);
207 ir_node *val = get_irn_n(node, n_be_Spill_val);
208 ir_mode *mode = get_irn_mode(val);
209 ir_entity *entity = be_get_frame_entity(node);
210 ir_node *sched_point;
213 sched_point = sched_prev(node);
214 store = new_bd_sparc_St_imm(dbgi, block, val, ptr, mem, mode, entity, 0, true);
216 sched_add_after(sched_point, store);
218 exchange(node, store);
222 * walker to transform be_Spill and be_Reload nodes
224 static void sparc_after_ra_walker(ir_node *block, void *data)
226 ir_node *node, *prev;
229 for (node = sched_last(block); !sched_is_begin(node); node = prev) {
230 prev = sched_prev(node);
232 if (be_is_Reload(node)) {
233 transform_Reload(node);
234 } else if (be_is_Spill(node)) {
235 transform_Spill(node);
240 static void sparc_collect_frame_entity_nodes(ir_node *node, void *data)
242 be_fec_env_t *env = (be_fec_env_t*)data;
246 const sparc_load_store_attr_t *attr;
248 if (be_is_Reload(node) && be_get_frame_entity(node) == NULL) {
249 mode = get_irn_mode(node);
250 align = get_mode_size_bytes(mode);
251 be_node_needs_frame_entity(env, node, mode, align);
255 if (!is_sparc_Ld(node) && !is_sparc_Ldf(node))
258 attr = get_sparc_load_store_attr_const(node);
259 entity = attr->base.immediate_value_entity;
260 mode = attr->load_store_mode;
263 if (!attr->is_frame_entity)
265 if (arch_irn_get_flags(node) & sparc_arch_irn_flag_needs_64bit_spillslot)
267 align = get_mode_size_bytes(mode);
268 be_node_needs_frame_entity(env, node, mode, align);
271 static void sparc_set_frame_entity(ir_node *node, ir_entity *entity)
273 if (is_be_node(node)) {
274 be_node_set_frame_entity(node, entity);
276 /* we only say be_node_needs_frame_entity on nodes with load_store
277 * attributes, so this should be fine */
278 sparc_load_store_attr_t *attr = get_sparc_load_store_attr(node);
279 assert(attr->is_frame_entity);
280 assert(attr->base.immediate_value_entity == NULL);
281 attr->base.immediate_value_entity = entity;
285 static void sparc_after_ra(ir_graph *irg)
287 be_stack_layout_t *stack_layout = be_get_irg_stack_layout(irg);
288 bool at_begin = stack_layout->sp_relative ? true : false;
289 be_fec_env_t *fec_env = be_new_frame_entity_coalescer(irg);
291 irg_walk_graph(irg, NULL, sparc_collect_frame_entity_nodes, fec_env);
292 be_assign_entities(fec_env, sparc_set_frame_entity, at_begin);
293 be_free_frame_entity_coalescer(fec_env);
295 irg_block_walk_graph(irg, NULL, sparc_after_ra_walker, NULL);
297 sparc_introduce_prolog_epilog(irg);
300 static void sparc_init_graph(ir_graph *irg)
305 extern const arch_isa_if_t sparc_isa_if;
306 static sparc_isa_t sparc_isa_template = {
308 &sparc_isa_if, /* isa interface implementation */
313 &sparc_registers[REG_SP], /* stack pointer register */
314 &sparc_registers[REG_FRAME_POINTER],/* base pointer register */
315 &sparc_reg_classes[CLASS_sparc_gp], /* link pointer register class */
316 3, /* power of two stack alignment
318 NULL, /* main environment */
319 7, /* costs for a spill instruction */
320 5, /* costs for a reload instruction */
321 true, /* custom abi handling */
323 NULL, /* constants */
327 * rewrite unsigned->float conversion.
328 * Sparc has no instruction for this so instead we do the following:
330 * int signed_x = unsigned_value_x;
331 * double res = signed_x;
333 * res += 4294967296. ;
334 * return (float) res;
336 static void rewrite_unsigned_float_Conv(ir_node *node)
338 ir_graph *irg = get_irn_irg(node);
339 dbg_info *dbgi = get_irn_dbg_info(node);
340 ir_node *lower_block = get_nodes_block(node);
345 ir_node *block = get_nodes_block(node);
346 ir_node *unsigned_x = get_Conv_op(node);
347 ir_mode *mode_u = get_irn_mode(unsigned_x);
348 ir_mode *mode_s = find_signed_mode(mode_u);
349 ir_mode *mode_d = mode_D;
350 ir_node *signed_x = new_rd_Conv(dbgi, block, unsigned_x, mode_s);
351 ir_node *res = new_rd_Conv(dbgi, block, signed_x, mode_d);
352 ir_node *zero = new_r_Const(irg, get_mode_null(mode_s));
353 ir_node *cmp = new_rd_Cmp(dbgi, block, signed_x, zero,
355 ir_node *cond = new_rd_Cond(dbgi, block, cmp);
356 ir_node *proj_true = new_r_Proj(cond, mode_X, pn_Cond_true);
357 ir_node *proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
358 ir_node *in_true[1] = { proj_true };
359 ir_node *in_false[1] = { proj_false };
360 ir_node *true_block = new_r_Block(irg, ARRAY_SIZE(in_true), in_true);
361 ir_node *false_block = new_r_Block(irg, ARRAY_SIZE(in_false),in_false);
362 ir_node *true_jmp = new_r_Jmp(true_block);
363 ir_node *false_jmp = new_r_Jmp(false_block);
364 ir_tarval *correction = new_tarval_from_double(4294967296., mode_d);
365 ir_node *c_const = new_r_Const(irg, correction);
366 ir_node *fadd = new_rd_Add(dbgi, true_block, res, c_const,
369 ir_node *lower_in[2] = { true_jmp, false_jmp };
370 ir_node *phi_in[2] = { fadd, res };
371 ir_mode *dest_mode = get_irn_mode(node);
375 set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
376 phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, mode_d);
377 assert(get_Block_phis(lower_block) == NULL);
378 set_Block_phis(lower_block, phi);
379 set_Phi_next(phi, NULL);
381 res_conv = new_rd_Conv(dbgi, lower_block, phi, dest_mode);
383 exchange(node, res_conv);
387 static int sparc_rewrite_Conv(ir_node *node, void *ctx)
389 ir_mode *to_mode = get_irn_mode(node);
390 ir_node *op = get_Conv_op(node);
391 ir_mode *from_mode = get_irn_mode(op);
394 if (mode_is_float(to_mode) && mode_is_int(from_mode)
395 && get_mode_size_bits(from_mode) == 32
396 && !mode_is_signed(from_mode)) {
397 rewrite_unsigned_float_Conv(node);
404 static void sparc_handle_intrinsics(void)
406 ir_type *tp, *int_tp, *uint_tp;
408 size_t n_records = 0;
410 runtime_rt rt_iMod, rt_uMod;
412 #define ID(x) new_id_from_chars(x, sizeof(x)-1)
414 int_tp = new_type_primitive(mode_Is);
415 uint_tp = new_type_primitive(mode_Iu);
417 /* we need to rewrite some forms of int->float conversions */
419 i_instr_record *map_Conv = &records[n_records++].i_instr;
421 map_Conv->kind = INTRINSIC_INSTR;
422 map_Conv->op = op_Conv;
423 map_Conv->i_mapper = sparc_rewrite_Conv;
425 /* SPARC has no signed mod instruction ... */
427 i_instr_record *map_Mod = &records[n_records++].i_instr;
429 tp = new_type_method(2, 1);
430 set_method_param_type(tp, 0, int_tp);
431 set_method_param_type(tp, 1, int_tp);
432 set_method_res_type(tp, 0, int_tp);
434 rt_iMod.ent = new_entity(get_glob_type(), ID(".rem"), tp);
435 set_entity_ld_ident(rt_iMod.ent, ID(".rem"));
436 rt_iMod.mode = mode_T;
437 rt_iMod.res_mode = mode_Is;
438 rt_iMod.mem_proj_nr = pn_Mod_M;
439 rt_iMod.regular_proj_nr = pn_Mod_X_regular;
440 rt_iMod.exc_proj_nr = pn_Mod_X_except;
441 rt_iMod.exc_mem_proj_nr = pn_Mod_M;
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.exc_mem_proj_nr = pn_Mod_M;
468 rt_uMod.res_proj_nr = pn_Mod_res;
470 set_entity_visibility(rt_uMod.ent, ir_visibility_external);
472 map_Mod->kind = INTRINSIC_INSTR;
473 map_Mod->op = op_Mod;
474 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
475 map_Mod->ctx = &rt_uMod;
478 assert(n_records < ARRAY_SIZE(records));
479 lower_intrinsics(records, n_records, /*part_block_used=*/ true);
483 * Initializes the backend ISA
485 static arch_env_t *sparc_init(FILE *outfile)
487 sparc_isa_t *isa = XMALLOC(sparc_isa_t);
488 *isa = sparc_isa_template;
489 isa->constants = pmap_create();
491 be_emit_init(outfile);
493 sparc_register_init();
494 sparc_create_opcodes(&sparc_irn_ops);
495 sparc_handle_intrinsics();
501 * Closes the output file and frees the ISA structure.
503 static void sparc_done(void *self)
505 sparc_isa_t *isa = (sparc_isa_t*)self;
507 /* emit now all global declarations */
508 be_gas_emit_decls(isa->base.main_env);
510 pmap_destroy(isa->constants);
517 * Get the register class which shall be used to store a value of a given mode.
518 * @param self The this pointer.
519 * @param mode The mode in question.
520 * @return A register class which can hold values of the given mode.
522 static const arch_register_class_t *sparc_get_reg_class_for_mode(const ir_mode *mode)
524 if (mode_is_float(mode))
525 return &sparc_reg_classes[CLASS_sparc_fp];
527 return &sparc_reg_classes[CLASS_sparc_gp];
531 * Returns the necessary byte alignment for storing a register of given class.
533 static int sparc_get_reg_class_alignment(const arch_register_class_t *cls)
535 ir_mode *mode = arch_register_class_mode(cls);
536 return get_mode_size_bytes(mode);
539 static ir_node *sparc_create_set(ir_node *cond)
541 return ir_create_cond_set(cond, mode_Iu);
544 static void sparc_lower_for_target(void)
546 size_t i, n_irgs = get_irp_n_irgs();
547 lower_mode_b_config_t lower_mode_b_config = {
552 lower_params_t params = {
553 4, /* def_ptr_alignment */
554 LF_COMPOUND_RETURN | LF_RETURN_HIDDEN, /* flags */
555 ADD_HIDDEN_ALWAYS_IN_FRONT, /* hidden_params */
556 NULL, /* find pointer type */
557 NULL, /* ret_compound_in_regs */
559 lower_calls_with_compounds(¶ms);
563 for (i = 0; i < n_irgs; ++i) {
564 ir_graph *irg = get_irp_irg(i);
565 ir_lower_mode_b(irg, &lower_mode_b_config);
566 lower_switch(irg, 4, 256, false);
570 static int sparc_is_mux_allowed(ir_node *sel, ir_node *mux_false,
573 ir_graph *irg = get_irn_irg(sel);
574 ir_mode *mode = get_irn_mode(mux_true);
576 if (get_irg_phase_state(irg) == phase_low)
579 if (!mode_is_int(mode) && !mode_is_reference(mode) && mode != mode_b)
581 if (is_Const(mux_true) && is_Const_one(mux_true) &&
582 is_Const(mux_false) && is_Const_null(mux_false))
588 * Returns the libFirm configuration parameter for this backend.
590 static const backend_params *sparc_get_backend_params(void)
592 static const ir_settings_arch_dep_t arch_dep = {
593 1, /* also_use_subs */
594 1, /* maximum_shifts */
595 31, /* highest_shift_amount */
596 NULL, /* evaluate_cost_func */
599 32, /* max_bits_for_mulh */
601 static backend_params p = {
602 0, /* no inline assembly */
603 0, /* no support for RotL nodes */
605 &arch_dep, /* will be set later */
606 sparc_is_mux_allowed, /* parameter for if conversion */
607 NULL, /* float arithmetic mode */
608 0, /* no trampoline support: size 0 */
609 0, /* no trampoline support: align 0 */
610 NULL, /* no trampoline support: no trampoline builder */
611 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
616 static ir_graph **sparc_get_backend_irg_list(const void *self,
624 static asm_constraint_flags_t sparc_parse_asm_constraint(const char **c)
627 return ASM_CONSTRAINT_FLAG_INVALID;
630 static int sparc_is_valid_clobber(const char *clobber)
636 const arch_isa_if_t sparc_isa_if = {
638 sparc_lower_for_target,
640 NULL, /* handle intrinsics */
641 sparc_get_reg_class_for_mode,
643 sparc_get_reg_class_alignment,
644 sparc_get_backend_params,
645 sparc_get_backend_irg_list,
646 NULL, /* mark remat */
647 sparc_parse_asm_constraint,
648 sparc_is_valid_clobber,
651 NULL, /* get_pic_base */
652 NULL, /* before_abi */
658 NULL, /* register_saved_by */
661 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_sparc);
662 void be_init_arch_sparc(void)
664 be_register_isa_if("sparc", &sparc_isa_if);
665 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.cg");
666 sparc_init_transform();
667 sparc_init_emitter();