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
28 #include "lc_opts_enum.h"
36 #include "iroptimize.h"
42 #include "lower_alloc.h"
43 #include "lower_builtins.h"
44 #include "lower_calls.h"
45 #include "lower_mode_b.h"
46 #include "lower_softfloat.h"
60 #include "belistsched.h"
64 #include "bearch_sparc_t.h"
66 #include "sparc_new_nodes.h"
67 #include "gen_sparc_regalloc_if.h"
68 #include "sparc_transform.h"
69 #include "sparc_emitter.h"
70 #include "sparc_cconv.h"
72 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
74 static ir_entity *sparc_get_frame_entity(const ir_node *node)
76 if (is_sparc_FrameAddr(node)) {
77 const sparc_attr_t *attr = get_sparc_attr_const(node);
78 return attr->immediate_value_entity;
81 if (sparc_has_load_store_attr(node)) {
82 const sparc_load_store_attr_t *load_store_attr
83 = get_sparc_load_store_attr_const(node);
84 if (load_store_attr->is_frame_entity) {
85 return load_store_attr->base.immediate_value_entity;
93 * This function is called by the generic backend to correct offsets for
94 * nodes accessing the stack.
96 static void sparc_set_frame_offset(ir_node *node, int offset)
98 sparc_attr_t *attr = get_sparc_attr(node);
99 attr->immediate_value += offset;
101 /* must be a FrameAddr or a load/store node with frame_entity */
102 assert(is_sparc_FrameAddr(node) ||
103 get_sparc_load_store_attr_const(node)->is_frame_entity);
106 static int sparc_get_sp_bias(const ir_node *node)
108 if (is_sparc_Save(node)) {
109 const sparc_attr_t *attr = get_sparc_attr_const(node);
110 if (get_irn_arity(node) == 3)
111 panic("no support for _reg variant yet");
113 return -attr->immediate_value;
114 } else if (is_sparc_RestoreZero(node)) {
115 return SP_BIAS_RESET;
120 /* fill register allocator interface */
122 const arch_irn_ops_t sparc_irn_ops = {
123 sparc_get_frame_entity,
124 sparc_set_frame_offset,
126 NULL, /* get_op_estimated_cost */
127 NULL, /* possible_memory_operand */
128 NULL, /* perform_memory_operand */
132 * Transforms the standard firm graph into
135 static void sparc_prepare_graph(ir_graph *irg)
137 sparc_transform_graph(irg);
140 static bool sparc_modifies_flags(const ir_node *node)
142 be_foreach_out(node, o) {
143 const arch_register_req_t *req = arch_get_irn_register_req_out(node, o);
144 if (req->cls == &sparc_reg_classes[CLASS_sparc_flags_class])
150 static bool sparc_modifies_fp_flags(const ir_node *node)
152 be_foreach_out(node, o) {
153 const arch_register_req_t *req = arch_get_irn_register_req_out(node, o);
154 if (req->cls == &sparc_reg_classes[CLASS_sparc_fpflags_class])
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);
169 extern const arch_isa_if_t sparc_isa_if;
170 static sparc_isa_t sparc_isa_template = {
172 &sparc_isa_if, /* isa interface implementation */
177 &sparc_registers[REG_SP], /* stack pointer register */
178 &sparc_registers[REG_FRAME_POINTER], /* base pointer register */
179 3, /* power of two stack alignment
181 NULL, /* main environment */
182 7, /* costs for a spill instruction */
183 5, /* costs for a reload instruction */
184 true, /* custom abi handling */
186 NULL, /* constants */
187 SPARC_FPU_ARCH_FPU, /* FPU architecture */
191 * rewrite unsigned->float conversion.
192 * Sparc has no instruction for this so instead we do the following:
194 * int signed_x = unsigned_value_x;
195 * double res = signed_x;
197 * res += 4294967296. ;
198 * return (float) res;
200 static void rewrite_unsigned_float_Conv(ir_node *node)
202 ir_graph *irg = get_irn_irg(node);
203 dbg_info *dbgi = get_irn_dbg_info(node);
204 ir_node *lower_block = get_nodes_block(node);
209 ir_node *block = get_nodes_block(node);
210 ir_node *unsigned_x = get_Conv_op(node);
211 ir_mode *mode_u = get_irn_mode(unsigned_x);
212 ir_mode *mode_s = find_signed_mode(mode_u);
213 ir_mode *mode_d = mode_D;
214 ir_node *signed_x = new_rd_Conv(dbgi, block, unsigned_x, mode_s);
215 ir_node *res = new_rd_Conv(dbgi, block, signed_x, mode_d);
216 ir_node *zero = new_r_Const(irg, get_mode_null(mode_s));
217 ir_node *cmp = new_rd_Cmp(dbgi, block, signed_x, zero,
219 ir_node *cond = new_rd_Cond(dbgi, block, cmp);
220 ir_node *proj_true = new_r_Proj(cond, mode_X, pn_Cond_true);
221 ir_node *proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
222 ir_node *in_true[1] = { proj_true };
223 ir_node *in_false[1] = { proj_false };
224 ir_node *true_block = new_r_Block(irg, ARRAY_SIZE(in_true), in_true);
225 ir_node *false_block = new_r_Block(irg, ARRAY_SIZE(in_false),in_false);
226 ir_node *true_jmp = new_r_Jmp(true_block);
227 ir_node *false_jmp = new_r_Jmp(false_block);
228 ir_tarval *correction = new_tarval_from_double(4294967296., mode_d);
229 ir_node *c_const = new_r_Const(irg, correction);
230 ir_node *fadd = new_rd_Add(dbgi, true_block, res, c_const,
233 ir_node *lower_in[2] = { true_jmp, false_jmp };
234 ir_node *phi_in[2] = { fadd, res };
235 ir_mode *dest_mode = get_irn_mode(node);
239 set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
240 phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, mode_d);
241 assert(get_Block_phis(lower_block) == NULL);
242 set_Block_phis(lower_block, phi);
243 set_Phi_next(phi, NULL);
245 res_conv = new_rd_Conv(dbgi, lower_block, phi, dest_mode);
247 exchange(node, res_conv);
252 * rewrite float->unsigned conversions.
253 * Sparc has no instruction for this so instead we do the following:
255 * if (x >= 2147483648.) {
256 * converted ^= (int)(x-2147483648.) ^ 0x80000000;
258 * converted = (int)x;
260 * return (unsigned)converted;
262 static void rewrite_float_unsigned_Conv(ir_node *node)
264 ir_graph *irg = get_irn_irg(node);
265 dbg_info *dbgi = get_irn_dbg_info(node);
266 ir_node *lower_block = get_nodes_block(node);
271 ir_node *block = get_nodes_block(node);
272 ir_node *float_x = get_Conv_op(node);
273 ir_mode *mode_u = get_irn_mode(node);
274 ir_mode *mode_s = find_signed_mode(mode_u);
275 ir_mode *mode_f = get_irn_mode(float_x);
276 ir_tarval *limit = new_tarval_from_double(2147483648., mode_f);
277 ir_node *limitc = new_r_Const(irg, limit);
278 ir_node *cmp = new_rd_Cmp(dbgi, block, float_x, limitc,
279 ir_relation_greater_equal);
280 ir_node *cond = new_rd_Cond(dbgi, block, cmp);
281 ir_node *proj_true = new_r_Proj(cond, mode_X, pn_Cond_true);
282 ir_node *proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
283 ir_node *in_true[1] = { proj_true };
284 ir_node *in_false[1] = { proj_false };
285 ir_node *true_block = new_r_Block(irg, ARRAY_SIZE(in_true), in_true);
286 ir_node *false_block = new_r_Block(irg, ARRAY_SIZE(in_false),in_false);
287 ir_node *true_jmp = new_r_Jmp(true_block);
288 ir_node *false_jmp = new_r_Jmp(false_block);
290 ir_tarval *correction = new_tarval_from_long(0x80000000l, mode_s);
291 ir_node *c_const = new_r_Const(irg, correction);
292 ir_node *sub = new_rd_Sub(dbgi, true_block, float_x, limitc,
294 ir_node *sub_conv = new_rd_Conv(dbgi, true_block, sub, mode_s);
295 ir_node *xorn = new_rd_Eor(dbgi, true_block, sub_conv, c_const,
298 ir_node *converted = new_rd_Conv(dbgi, false_block, float_x,mode_s);
300 ir_node *lower_in[2] = { true_jmp, false_jmp };
301 ir_node *phi_in[2] = { xorn, converted };
305 set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
306 phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, mode_s);
307 assert(get_Block_phis(lower_block) == NULL);
308 set_Block_phis(lower_block, phi);
309 set_Phi_next(phi, NULL);
311 res_conv = new_rd_Conv(dbgi, lower_block, phi, mode_u);
312 exchange(node, res_conv);
316 static int sparc_rewrite_Conv(ir_node *node, void *ctx)
318 ir_mode *to_mode = get_irn_mode(node);
319 ir_node *op = get_Conv_op(node);
320 ir_mode *from_mode = get_irn_mode(op);
323 if (mode_is_float(to_mode) && mode_is_int(from_mode)
324 && get_mode_size_bits(from_mode) == 32
325 && !mode_is_signed(from_mode)) {
326 rewrite_unsigned_float_Conv(node);
329 if (mode_is_float(from_mode) && mode_is_int(to_mode)
330 && get_mode_size_bits(to_mode) <= 32
331 && !mode_is_signed(to_mode)) {
332 rewrite_float_unsigned_Conv(node);
339 static void sparc_handle_intrinsics(void)
341 ir_type *tp, *int_tp, *uint_tp;
343 size_t n_records = 0;
345 runtime_rt rt_iMod, rt_uMod;
347 #define ID(x) new_id_from_chars(x, sizeof(x)-1)
349 int_tp = new_type_primitive(mode_Is);
350 uint_tp = new_type_primitive(mode_Iu);
352 /* we need to rewrite some forms of int->float conversions */
354 i_instr_record *map_Conv = &records[n_records++].i_instr;
356 map_Conv->kind = INTRINSIC_INSTR;
357 map_Conv->op = op_Conv;
358 map_Conv->i_mapper = sparc_rewrite_Conv;
360 /* SPARC has no signed mod instruction ... */
362 i_instr_record *map_Mod = &records[n_records++].i_instr;
364 tp = new_type_method(2, 1);
365 set_method_param_type(tp, 0, int_tp);
366 set_method_param_type(tp, 1, int_tp);
367 set_method_res_type(tp, 0, int_tp);
369 rt_iMod.ent = new_entity(get_glob_type(), ID(".rem"), tp);
370 set_entity_ld_ident(rt_iMod.ent, ID(".rem"));
371 rt_iMod.mode = mode_T;
372 rt_iMod.res_mode = mode_Is;
373 rt_iMod.mem_proj_nr = pn_Mod_M;
374 rt_iMod.regular_proj_nr = pn_Mod_X_regular;
375 rt_iMod.exc_proj_nr = pn_Mod_X_except;
376 rt_iMod.res_proj_nr = pn_Mod_res;
378 set_entity_visibility(rt_iMod.ent, ir_visibility_external);
380 map_Mod->kind = INTRINSIC_INSTR;
381 map_Mod->op = op_Mod;
382 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
383 map_Mod->ctx = &rt_iMod;
385 /* ... nor an unsigned mod. */
387 i_instr_record *map_Mod = &records[n_records++].i_instr;
389 tp = new_type_method(2, 1);
390 set_method_param_type(tp, 0, uint_tp);
391 set_method_param_type(tp, 1, uint_tp);
392 set_method_res_type(tp, 0, uint_tp);
394 rt_uMod.ent = new_entity(get_glob_type(), ID(".urem"), tp);
395 set_entity_ld_ident(rt_uMod.ent, ID(".urem"));
396 rt_uMod.mode = mode_T;
397 rt_uMod.res_mode = mode_Iu;
398 rt_uMod.mem_proj_nr = pn_Mod_M;
399 rt_uMod.regular_proj_nr = pn_Mod_X_regular;
400 rt_uMod.exc_proj_nr = pn_Mod_X_except;
401 rt_uMod.res_proj_nr = pn_Mod_res;
403 set_entity_visibility(rt_uMod.ent, ir_visibility_external);
405 map_Mod->kind = INTRINSIC_INSTR;
406 map_Mod->op = op_Mod;
407 map_Mod->i_mapper = (i_mapper_func)i_mapper_RuntimeCall;
408 map_Mod->ctx = &rt_uMod;
411 assert(n_records < ARRAY_SIZE(records));
412 lower_intrinsics(records, n_records, /*part_block_used=*/ true);
415 static void sparc_init(void)
417 sparc_register_init();
418 sparc_create_opcodes(&sparc_irn_ops);
422 static void sparc_finish(void)
424 sparc_free_opcodes();
427 static arch_env_t *sparc_begin_codegeneration(const be_main_env_t *env)
429 sparc_isa_t *isa = XMALLOC(sparc_isa_t);
430 *isa = sparc_isa_template;
431 isa->constants = pmap_create();
433 be_gas_elf_type_char = '#';
434 be_gas_elf_variant = ELF_VARIANT_SPARC;
436 be_emit_init(env->file_handle);
437 be_gas_begin_compilation_unit(env);
443 * Closes the output file and frees the ISA structure.
445 static void sparc_end_codegeneration(void *self)
447 sparc_isa_t *isa = (sparc_isa_t*)self;
449 /* emit now all global declarations */
450 be_gas_end_compilation_unit(isa->base.main_env);
452 pmap_destroy(isa->constants);
457 static void sparc_lower_for_target(void)
459 ir_mode *mode_gp = sparc_reg_classes[CLASS_sparc_gp].mode;
460 size_t i, n_irgs = get_irp_n_irgs();
462 lower_calls_with_compounds(LF_RETURN_HIDDEN);
464 for (i = 0; i < n_irgs; ++i) {
465 ir_graph *irg = get_irp_irg(i);
466 /* Turn all small CopyBs into loads/stores and all bigger CopyBs into
468 lower_CopyB(irg, 31, 32, false);
471 if (sparc_isa_template.fpu_arch == SPARC_FPU_ARCH_SOFTFLOAT)
472 lower_floating_point();
474 lower_builtins(0, NULL);
478 for (i = 0; i < n_irgs; ++i) {
479 ir_graph *irg = get_irp_irg(i);
480 ir_lower_mode_b(irg, mode_Iu);
481 lower_switch(irg, 4, 256, mode_gp);
482 /* TODO: Pass SPARC_MIN_STACKSIZE as addr_delta as soon as
483 * Alloc nodes are implemented more efficiently. */
484 lower_alloc(irg, SPARC_STACK_ALIGNMENT, true, 0);
488 static int sparc_is_mux_allowed(ir_node *sel, ir_node *mux_false,
491 return ir_is_optimizable_mux(sel, mux_false, mux_true);
495 * Returns the libFirm configuration parameter for this backend.
497 static const backend_params *sparc_get_backend_params(void)
499 static const ir_settings_arch_dep_t arch_dep = {
500 1, /* also_use_subs */
501 1, /* maximum_shifts */
502 31, /* highest_shift_amount */
503 NULL, /* evaluate_cost_func */
506 32, /* max_bits_for_mulh */
508 static backend_params p = {
509 0, /* no inline assembly */
510 0, /* no support for RotL nodes */
512 1, /* modulo shift efficient */
513 0, /* non-modulo shift not efficient */
514 &arch_dep, /* will be set later */
515 sparc_is_mux_allowed, /* parameter for if conversion */
516 32, /* machine size */
517 NULL, /* float arithmetic mode */
518 NULL, /* long long type */
519 NULL, /* usigned long long type */
520 NULL, /* long double type */
521 0, /* no trampoline support: size 0 */
522 0, /* no trampoline support: align 0 */
523 NULL, /* no trampoline support: no trampoline builder */
524 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
527 ir_mode *mode_long_long
528 = new_int_mode("long long", irma_twos_complement, 64, 1, 64);
529 ir_type *type_long_long = new_type_primitive(mode_long_long);
530 ir_mode *mode_unsigned_long_long
531 = new_int_mode("unsigned long long", irma_twos_complement, 64, 0, 64);
532 ir_type *type_unsigned_long_long
533 = new_type_primitive(mode_unsigned_long_long);
535 p.type_long_long = type_long_long;
536 p.type_unsigned_long_long = type_unsigned_long_long;
538 ir_type *type_long_double = new_type_primitive(mode_Q);
540 set_type_alignment_bytes(type_long_double, 8);
541 set_type_size_bytes(type_long_double, 16);
542 p.type_long_double = type_long_double;
546 static asm_constraint_flags_t sparc_parse_asm_constraint(const char **c)
549 return ASM_CONSTRAINT_FLAG_INVALID;
552 static int sparc_is_valid_clobber(const char *clobber)
558 /* fpu set architectures. */
559 static const lc_opt_enum_int_items_t sparc_fpu_items[] = {
560 { "fpu", SPARC_FPU_ARCH_FPU },
561 { "softfloat", SPARC_FPU_ARCH_SOFTFLOAT },
565 static lc_opt_enum_int_var_t arch_fpu_var = {
566 &sparc_isa_template.fpu_arch, sparc_fpu_items
569 static const lc_opt_table_entry_t sparc_options[] = {
570 LC_OPT_ENT_ENUM_INT("fpunit", "select the floating point unit", &arch_fpu_var),
574 static ir_node *sparc_new_spill(ir_node *value, ir_node *after)
576 ir_node *block = get_block(after);
577 ir_graph *irg = get_irn_irg(value);
578 ir_node *frame = get_irg_frame(irg);
579 ir_node *mem = get_irg_no_mem(irg);
580 ir_mode *mode = get_irn_mode(value);
583 if (mode_is_float(mode)) {
584 store = create_stf(NULL, block, value, frame, mem, mode, NULL, 0, true);
586 store = new_bd_sparc_St_imm(NULL, block, value, frame, mem, mode, NULL,
589 sched_add_after(after, store);
593 static ir_node *sparc_new_reload(ir_node *value, ir_node *spill,
596 ir_node *block = get_block(before);
597 ir_graph *irg = get_irn_irg(value);
598 ir_node *frame = get_irg_frame(irg);
599 ir_mode *mode = get_irn_mode(value);
603 if (mode_is_float(mode)) {
604 load = create_ldf(NULL, block, frame, spill, mode, NULL, 0, true);
606 load = new_bd_sparc_Ld_imm(NULL, block, frame, spill, mode, NULL, 0,
609 sched_add_before(before, load);
610 assert((long)pn_sparc_Ld_res == (long)pn_sparc_Ldf_res);
611 res = new_r_Proj(load, mode, pn_sparc_Ld_res);
616 const arch_isa_if_t sparc_isa_if = {
619 sparc_get_backend_params,
620 sparc_lower_for_target,
621 sparc_parse_asm_constraint,
622 sparc_is_valid_clobber,
624 sparc_begin_codegeneration,
625 sparc_end_codegeneration,
627 NULL, /* get call abi */
628 NULL, /* mark remat */
629 NULL, /* get_pic_base */
632 NULL, /* register_saved_by */
634 sparc_handle_intrinsics,
635 NULL, /* before_abi */
642 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_sparc)
643 void be_init_arch_sparc(void)
645 lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
646 lc_opt_entry_t *sparc_grp = lc_opt_get_grp(be_grp, "sparc");
648 lc_opt_add_table(sparc_grp, sparc_options);
650 be_register_isa_if("sparc", &sparc_isa_if);
651 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.cg");
652 sparc_init_transform();
653 sparc_init_emitter();