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"
48 #include "../bearch.h"
49 #include "../benode.h"
50 #include "../belower.h"
51 #include "../besched.h"
53 #include "../bemachine.h"
54 #include "../bemodule.h"
56 #include "../bespillslots.h"
57 #include "../begnuas.h"
58 #include "../belistsched.h"
59 #include "../beflags.h"
61 #include "bearch_sparc_t.h"
63 #include "sparc_new_nodes.h"
64 #include "gen_sparc_regalloc_if.h"
65 #include "sparc_transform.h"
66 #include "sparc_emitter.h"
68 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
70 static arch_irn_class_t sparc_classify(const ir_node *node)
73 return arch_irn_class_none;
76 static ir_entity *sparc_get_frame_entity(const ir_node *node)
78 if (is_sparc_FrameAddr(node)) {
79 const sparc_attr_t *attr = get_sparc_attr_const(node);
80 return attr->immediate_value_entity;
83 if (sparc_has_load_store_attr(node)) {
84 const sparc_load_store_attr_t *load_store_attr
85 = get_sparc_load_store_attr_const(node);
86 if (load_store_attr->is_frame_entity) {
87 return load_store_attr->base.immediate_value_entity;
95 * This function is called by the generic backend to correct offsets for
96 * nodes accessing the stack.
98 static void sparc_set_frame_offset(ir_node *node, int offset)
100 sparc_attr_t *attr = get_sparc_attr(node);
101 attr->immediate_value += offset;
103 /* must be a FrameAddr or a load/store node with frame_entity */
104 assert(is_sparc_FrameAddr(node) ||
105 get_sparc_load_store_attr_const(node)->is_frame_entity);
108 static int sparc_get_sp_bias(const ir_node *node)
110 if (is_sparc_Save(node)) {
111 const sparc_attr_t *attr = get_sparc_attr_const(node);
112 if (get_irn_arity(node) == 3)
113 panic("no support for _reg variant yet");
115 /* Note we do not report the change of the SPARC_MIN_STACKSIZE
116 * size, since we have additional magic in the emitter which
117 * calculates that! */
118 assert(attr->immediate_value <= -SPARC_MIN_STACKSIZE);
119 return attr->immediate_value + SPARC_MIN_STACKSIZE;
124 /* fill register allocator interface */
126 static const arch_irn_ops_t sparc_irn_ops = {
128 sparc_get_frame_entity,
129 sparc_set_frame_offset,
131 NULL, /* get_inverse */
132 NULL, /* get_op_estimated_cost */
133 NULL, /* possible_memory_operand */
134 NULL, /* perform_memory_operand */
138 * Transforms the standard firm graph into
141 static void sparc_prepare_graph(ir_graph *irg)
143 sparc_transform_graph(irg);
146 static bool sparc_modifies_flags(const ir_node *node)
148 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_flags;
151 static bool sparc_modifies_fp_flags(const ir_node *node)
153 return arch_irn_get_flags(node) & sparc_arch_irn_flag_modifies_fp_flags;
156 static void sparc_before_ra(ir_graph *irg)
158 /* fixup flags register */
159 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_flags_class],
160 NULL, sparc_modifies_flags);
161 be_sched_fix_flags(irg, &sparc_reg_classes[CLASS_sparc_fpflags_class],
162 NULL, sparc_modifies_fp_flags);
166 * transform reload node => load
168 static void transform_Reload(ir_node *node)
170 ir_node *block = get_nodes_block(node);
171 dbg_info *dbgi = get_irn_dbg_info(node);
172 ir_node *ptr = get_irn_n(node, be_pos_Spill_frame);
173 ir_node *mem = get_irn_n(node, be_pos_Reload_mem);
174 ir_mode *mode = get_irn_mode(node);
175 ir_entity *entity = be_get_frame_entity(node);
176 const arch_register_t *reg;
180 ir_node *sched_point = sched_prev(node);
182 load = new_bd_sparc_Ld_imm(dbgi, block, ptr, mem, mode, entity, 0, true);
183 sched_add_after(sched_point, load);
186 proj = new_rd_Proj(dbgi, load, mode, pn_sparc_Ld_res);
188 reg = arch_get_irn_register(node);
189 arch_set_irn_register(proj, reg);
191 exchange(node, proj);
195 * transform spill node => store
197 static void transform_Spill(ir_node *node)
199 ir_node *block = get_nodes_block(node);
200 dbg_info *dbgi = get_irn_dbg_info(node);
201 ir_node *ptr = get_irn_n(node, be_pos_Spill_frame);
202 ir_graph *irg = get_irn_irg(node);
203 ir_node *mem = new_r_NoMem(irg);
204 ir_node *val = get_irn_n(node, be_pos_Spill_val);
205 ir_mode *mode = get_irn_mode(val);
206 ir_entity *entity = be_get_frame_entity(node);
207 ir_node *sched_point;
210 sched_point = sched_prev(node);
211 store = new_bd_sparc_St_imm(dbgi, block, val, ptr, mem, mode, entity, 0, true);
213 sched_add_after(sched_point, store);
215 exchange(node, store);
219 * walker to transform be_Spill and be_Reload nodes
221 static void sparc_after_ra_walker(ir_node *block, void *data)
223 ir_node *node, *prev;
226 for (node = sched_last(block); !sched_is_begin(node); node = prev) {
227 prev = sched_prev(node);
229 if (be_is_Reload(node)) {
230 transform_Reload(node);
231 } else if (be_is_Spill(node)) {
232 transform_Spill(node);
237 static void sparc_collect_frame_entity_nodes(ir_node *node, void *data)
239 be_fec_env_t *env = (be_fec_env_t*)data;
243 const sparc_load_store_attr_t *attr;
245 if (be_is_Reload(node) && be_get_frame_entity(node) == NULL) {
246 mode = get_irn_mode(node);
247 align = get_mode_size_bytes(mode);
248 be_node_needs_frame_entity(env, node, mode, align);
252 if (!is_sparc_Ld(node) && !is_sparc_Ldf(node))
255 attr = get_sparc_load_store_attr_const(node);
256 entity = attr->base.immediate_value_entity;
257 mode = attr->load_store_mode;
260 if (!attr->is_frame_entity)
262 if (arch_irn_get_flags(node) & sparc_arch_irn_flag_needs_64bit_spillslot)
264 align = get_mode_size_bytes(mode);
265 be_node_needs_frame_entity(env, node, mode, align);
268 static void sparc_set_frame_entity(ir_node *node, ir_entity *entity)
270 if (is_be_node(node)) {
271 be_node_set_frame_entity(node, entity);
273 /* we only say be_node_needs_frame_entity on nodes with load_store
274 * attributes, so this should be fine */
275 sparc_load_store_attr_t *attr = get_sparc_load_store_attr(node);
276 assert(attr->is_frame_entity);
277 assert(attr->base.immediate_value_entity == NULL);
278 attr->base.immediate_value_entity = entity;
282 static void sparc_after_ra(ir_graph *irg)
284 be_stack_layout_t *stack_layout = be_get_irg_stack_layout(irg);
285 bool at_begin = stack_layout->sp_relative ? true : false;
286 be_fec_env_t *fec_env = be_new_frame_entity_coalescer(irg);
288 irg_walk_graph(irg, NULL, sparc_collect_frame_entity_nodes, fec_env);
289 be_assign_entities(fec_env, sparc_set_frame_entity, at_begin);
290 be_free_frame_entity_coalescer(fec_env);
292 irg_block_walk_graph(irg, NULL, sparc_after_ra_walker, NULL);
295 static void sparc_init_graph(ir_graph *irg)
300 extern const arch_isa_if_t sparc_isa_if;
301 static sparc_isa_t sparc_isa_template = {
303 &sparc_isa_if, /* isa interface implementation */
308 &sparc_registers[REG_SP], /* stack pointer register */
309 &sparc_registers[REG_FRAME_POINTER],/* base pointer register */
310 &sparc_reg_classes[CLASS_sparc_gp], /* link pointer register class */
311 -1, /* stack direction */
312 3, /* power of two stack alignment
314 NULL, /* main environment */
315 7, /* costs for a spill instruction */
316 5, /* costs for a reload instruction */
317 true, /* custom abi handling */
319 NULL, /* constants */
323 * rewrite unsigned->float conversion.
324 * Sparc has no instruction for this so instead we do the following:
326 * int signed_x = unsigned_value_x;
327 * double res = signed_x;
329 * res += 4294967296. ;
330 * return (float) res;
332 static void rewrite_unsigned_float_Conv(ir_node *node)
334 ir_graph *irg = get_irn_irg(node);
335 dbg_info *dbgi = get_irn_dbg_info(node);
336 ir_node *lower_block = get_nodes_block(node);
341 ir_node *block = get_nodes_block(node);
342 ir_node *unsigned_x = get_Conv_op(node);
343 ir_mode *mode_u = get_irn_mode(unsigned_x);
344 ir_mode *mode_s = find_signed_mode(mode_u);
345 ir_mode *mode_d = mode_D;
346 ir_node *signed_x = new_rd_Conv(dbgi, block, unsigned_x, mode_s);
347 ir_node *res = new_rd_Conv(dbgi, block, signed_x, mode_d);
348 ir_node *zero = new_r_Const(irg, get_mode_null(mode_s));
349 ir_node *cmp = new_rd_Cmp(dbgi, block, signed_x, zero,
351 ir_node *cond = new_rd_Cond(dbgi, block, cmp);
352 ir_node *proj_true = new_r_Proj(cond, mode_X, pn_Cond_true);
353 ir_node *proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
354 ir_node *in_true[1] = { proj_true };
355 ir_node *in_false[1] = { proj_false };
356 ir_node *true_block = new_r_Block(irg, ARRAY_SIZE(in_true), in_true);
357 ir_node *false_block = new_r_Block(irg, ARRAY_SIZE(in_false),in_false);
358 ir_node *true_jmp = new_r_Jmp(true_block);
359 ir_node *false_jmp = new_r_Jmp(false_block);
360 ir_tarval *correction = new_tarval_from_double(4294967296., mode_d);
361 ir_node *c_const = new_r_Const(irg, correction);
362 ir_node *fadd = new_rd_Add(dbgi, true_block, res, c_const,
365 ir_node *lower_in[2] = { true_jmp, false_jmp };
366 ir_node *phi_in[2] = { fadd, res };
367 ir_mode *dest_mode = get_irn_mode(node);
371 set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
372 phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, mode_d);
373 assert(get_Block_phis(lower_block) == NULL);
374 set_Block_phis(lower_block, phi);
375 set_Phi_next(phi, NULL);
377 res_conv = new_rd_Conv(dbgi, lower_block, phi, dest_mode);
379 exchange(node, res_conv);
383 static int sparc_rewrite_Conv(ir_node *node, void *ctx)
385 ir_mode *to_mode = get_irn_mode(node);
386 ir_node *op = get_Conv_op(node);
387 ir_mode *from_mode = get_irn_mode(op);
390 if (mode_is_float(to_mode) && mode_is_int(from_mode)
391 && get_mode_size_bits(from_mode) == 32
392 && !mode_is_signed(from_mode)) {
393 rewrite_unsigned_float_Conv(node);
400 static void sparc_handle_intrinsics(void)
402 ir_type *tp, *int_tp, *uint_tp;
404 size_t n_records = 0;
406 runtime_rt rt_iMod, rt_uMod;
408 #define ID(x) new_id_from_chars(x, sizeof(x)-1)
410 int_tp = new_type_primitive(mode_Is);
411 uint_tp = new_type_primitive(mode_Iu);
413 /* we need to rewrite some forms of int->float conversions */
415 i_instr_record *map_Conv = &records[n_records++].i_instr;
417 map_Conv->kind = INTRINSIC_INSTR;
418 map_Conv->op = op_Conv;
419 map_Conv->i_mapper = sparc_rewrite_Conv;
421 /* SPARC has no signed mod instruction ... */
423 i_instr_record *map_Mod = &records[n_records++].i_instr;
425 tp = new_type_method(2, 1);
426 set_method_param_type(tp, 0, int_tp);
427 set_method_param_type(tp, 1, int_tp);
428 set_method_res_type(tp, 0, int_tp);
430 rt_iMod.ent = new_entity(get_glob_type(), ID(".rem"), tp);
431 set_entity_ld_ident(rt_iMod.ent, ID(".rem"));
432 rt_iMod.mode = mode_T;
433 rt_iMod.res_mode = mode_Is;
434 rt_iMod.mem_proj_nr = pn_Mod_M;
435 rt_iMod.regular_proj_nr = pn_Mod_X_regular;
436 rt_iMod.exc_proj_nr = pn_Mod_X_except;
437 rt_iMod.exc_mem_proj_nr = pn_Mod_M;
438 rt_iMod.res_proj_nr = pn_Mod_res;
440 set_entity_visibility(rt_iMod.ent, ir_visibility_external);
442 map_Mod->kind = INTRINSIC_INSTR;
443 map_Mod->op = op_Mod;
444 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
445 map_Mod->ctx = &rt_iMod;
447 /* ... nor an unsigned mod. */
449 i_instr_record *map_Mod = &records[n_records++].i_instr;
451 tp = new_type_method(2, 1);
452 set_method_param_type(tp, 0, uint_tp);
453 set_method_param_type(tp, 1, uint_tp);
454 set_method_res_type(tp, 0, uint_tp);
456 rt_uMod.ent = new_entity(get_glob_type(), ID(".urem"), tp);
457 set_entity_ld_ident(rt_uMod.ent, ID(".urem"));
458 rt_uMod.mode = mode_T;
459 rt_uMod.res_mode = mode_Iu;
460 rt_uMod.mem_proj_nr = pn_Mod_M;
461 rt_uMod.regular_proj_nr = pn_Mod_X_regular;
462 rt_uMod.exc_proj_nr = pn_Mod_X_except;
463 rt_uMod.exc_mem_proj_nr = pn_Mod_M;
464 rt_uMod.res_proj_nr = pn_Mod_res;
466 set_entity_visibility(rt_uMod.ent, ir_visibility_external);
468 map_Mod->kind = INTRINSIC_INSTR;
469 map_Mod->op = op_Mod;
470 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
471 map_Mod->ctx = &rt_uMod;
474 assert(n_records < ARRAY_SIZE(records));
475 lower_intrinsics(records, n_records, /*part_block_used=*/ true);
479 * Initializes the backend ISA
481 static arch_env_t *sparc_init(FILE *outfile)
483 sparc_isa_t *isa = XMALLOC(sparc_isa_t);
484 memcpy(isa, &sparc_isa_template, sizeof(*isa));
485 isa->constants = pmap_create();
487 be_emit_init(outfile);
489 sparc_register_init();
490 sparc_create_opcodes(&sparc_irn_ops);
491 sparc_handle_intrinsics();
497 * Closes the output file and frees the ISA structure.
499 static void sparc_done(void *self)
501 sparc_isa_t *isa = (sparc_isa_t*)self;
503 /* emit now all global declarations */
504 be_gas_emit_decls(isa->base.main_env);
506 pmap_destroy(isa->constants);
513 * Get the register class which shall be used to store a value of a given mode.
514 * @param self The this pointer.
515 * @param mode The mode in question.
516 * @return A register class which can hold values of the given mode.
518 static const arch_register_class_t *sparc_get_reg_class_for_mode(const ir_mode *mode)
520 if (mode_is_float(mode))
521 return &sparc_reg_classes[CLASS_sparc_fp];
523 return &sparc_reg_classes[CLASS_sparc_gp];
527 * Returns the necessary byte alignment for storing a register of given class.
529 static int sparc_get_reg_class_alignment(const arch_register_class_t *cls)
531 ir_mode *mode = arch_register_class_mode(cls);
532 return get_mode_size_bytes(mode);
535 static ir_node *sparc_create_set(ir_node *cond)
537 return ir_create_cond_set(cond, mode_Iu);
540 static void sparc_lower_for_target(void)
542 size_t i, n_irgs = get_irp_n_irgs();
543 lower_mode_b_config_t lower_mode_b_config = {
548 lower_params_t params = {
549 4, /* def_ptr_alignment */
550 LF_COMPOUND_RETURN | LF_RETURN_HIDDEN, /* flags */
551 ADD_HIDDEN_ALWAYS_IN_FRONT, /* hidden_params */
552 NULL, /* find pointer type */
553 NULL, /* ret_compound_in_regs */
556 lower_calls_with_compounds(¶ms);
558 for (i = 0; i < n_irgs; ++i) {
559 ir_graph *irg = get_irp_irg(i);
560 ir_lower_mode_b(irg, &lower_mode_b_config);
561 lower_switch(irg, 256, false);
565 static int sparc_is_mux_allowed(ir_node *sel, ir_node *mux_false,
568 ir_graph *irg = get_irn_irg(sel);
569 ir_mode *mode = get_irn_mode(mux_true);
571 if (get_irg_phase_state(irg) == phase_low)
574 if (!mode_is_int(mode) && !mode_is_reference(mode) && mode != mode_b)
576 if (is_Const(mux_true) && is_Const_one(mux_true) &&
577 is_Const(mux_false) && is_Const_null(mux_false))
583 * Returns the libFirm configuration parameter for this backend.
585 static const backend_params *sparc_get_backend_params(void)
587 static const ir_settings_arch_dep_t arch_dep = {
588 1, /* also_use_subs */
589 1, /* maximum_shifts */
590 31, /* highest_shift_amount */
591 NULL, /* evaluate_cost_func */
594 32, /* max_bits_for_mulh */
596 static backend_params p = {
597 0, /* no inline assembly */
598 0, /* no support for RotL nodes */
600 &arch_dep, /* will be set later */
601 sparc_is_mux_allowed, /* parameter for if conversion */
602 NULL, /* float arithmetic mode */
603 0, /* no trampoline support: size 0 */
604 0, /* no trampoline support: align 0 */
605 NULL, /* no trampoline support: no trampoline builder */
606 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
611 static ir_graph **sparc_get_backend_irg_list(const void *self,
619 static asm_constraint_flags_t sparc_parse_asm_constraint(const char **c)
622 return ASM_CONSTRAINT_FLAG_INVALID;
625 static int sparc_is_valid_clobber(const char *clobber)
631 const arch_isa_if_t sparc_isa_if = {
633 sparc_lower_for_target,
635 NULL, /* handle intrinsics */
636 sparc_get_reg_class_for_mode,
638 sparc_get_reg_class_alignment,
639 sparc_get_backend_params,
640 sparc_get_backend_irg_list,
641 NULL, /* mark remat */
642 sparc_parse_asm_constraint,
643 sparc_is_valid_clobber,
646 NULL, /* get_pic_base */
647 NULL, /* before_abi */
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();