2 * Copyright (C) 1995-2008 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 TEMPLATE backend driver file.
37 #include "../bearch.h"
38 #include "../benode.h"
39 #include "../belower.h"
40 #include "../besched.h"
42 #include "../bemodule.h"
43 #include "../begnuas.h"
44 #include "../belistsched.h"
46 #include "bearch_TEMPLATE_t.h"
48 #include "TEMPLATE_new_nodes.h"
49 #include "gen_TEMPLATE_regalloc_if.h"
50 #include "TEMPLATE_transform.h"
51 #include "TEMPLATE_emitter.h"
53 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
55 static arch_irn_class_t TEMPLATE_classify(const ir_node *irn)
61 static ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
64 /* TODO: return the ir_entity assigned to the frame */
69 * This function is called by the generic backend to correct offsets for
70 * nodes accessing the stack.
72 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
76 /* TODO: correct offset if irn accesses the stack */
79 static int TEMPLATE_get_sp_bias(const ir_node *irn)
85 /* fill register allocator interface */
87 static const arch_irn_ops_t TEMPLATE_irn_ops = {
89 TEMPLATE_get_frame_entity,
90 TEMPLATE_set_frame_offset,
92 NULL, /* get_inverse */
93 NULL, /* get_op_estimated_cost */
94 NULL, /* possible_memory_operand */
95 NULL, /* perform_memory_operand */
101 * Transforms the standard firm graph into
102 * a TEMLPATE firm graph
104 static void TEMPLATE_prepare_graph(void *self)
106 TEMPLATE_code_gen_t *cg = self;
108 /* transform nodes into assembler instructions */
109 TEMPLATE_transform_graph(cg);
115 * Called immediatly before emit phase.
117 static void TEMPLATE_finish_irg(void *self)
123 static void TEMPLATE_before_ra(void *self)
126 /* Some stuff you need to do after scheduling but before register allocation */
129 static void TEMPLATE_after_ra(void *self)
132 /* Some stuff you need to do immediatly after register allocation */
138 * Emits the code, closes the output file and frees
139 * the code generator interface.
141 static void TEMPLATE_emit_and_done(void *self)
143 TEMPLATE_code_gen_t *cg = self;
144 ir_graph *irg = cg->irg;
146 TEMPLATE_emit_routine(irg);
148 /* de-allocate code generator */
152 static void *TEMPLATE_cg_init(ir_graph *irg);
154 static const arch_code_generator_if_t TEMPLATE_code_gen_if = {
156 NULL, /* get_pic_base hook */
157 NULL, /* before abi introduce hook */
158 TEMPLATE_prepare_graph,
159 NULL, /* spill hook */
160 TEMPLATE_before_ra, /* before register allocation hook */
161 TEMPLATE_after_ra, /* after register allocation hook */
163 TEMPLATE_emit_and_done
167 * Initializes the code generator.
169 static void *TEMPLATE_cg_init(ir_graph *irg)
171 const arch_env_t *arch_env = be_get_irg_arch_env(irg);
172 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t *) arch_env;
173 TEMPLATE_code_gen_t *cg = XMALLOC(TEMPLATE_code_gen_t);
175 cg->impl = &TEMPLATE_code_gen_if;
179 return (arch_code_generator_t *)cg;
184 const arch_isa_if_t TEMPLATE_isa_if;
185 static TEMPLATE_isa_t TEMPLATE_isa_template = {
187 &TEMPLATE_isa_if, /* isa interface implementation */
188 &TEMPLATE_gp_regs[REG_SP], /* stack pointer register */
189 &TEMPLATE_gp_regs[REG_BP], /* base pointer register */
190 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
191 -1, /* stack direction */
192 2, /* power of two stack alignment for calls, 2^2 == 4 */
193 NULL, /* main environment */
194 7, /* costs for a spill instruction */
195 5, /* costs for a reload instruction */
196 false, /* no custom abi handling */
201 * Initializes the backend ISA
203 static arch_env_t *TEMPLATE_init(FILE *outfile)
205 static int run_once = 0;
212 isa = XMALLOC(TEMPLATE_isa_t);
213 memcpy(isa, &TEMPLATE_isa_template, sizeof(*isa));
215 be_emit_init(outfile);
217 TEMPLATE_register_init();
218 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
226 * Closes the output file and frees the ISA structure.
228 static void TEMPLATE_done(void *self)
230 TEMPLATE_isa_t *isa = self;
232 /* emit now all global declarations */
233 be_gas_emit_decls(isa->base.main_env);
240 static unsigned TEMPLATE_get_n_reg_class(void)
245 static const arch_register_class_t *TEMPLATE_get_reg_class(unsigned i)
247 assert(i < N_CLASSES);
248 return &TEMPLATE_reg_classes[i];
254 * Get the register class which shall be used to store a value of a given mode.
255 * @param self The this pointer.
256 * @param mode The mode in question.
257 * @return A register class which can hold values of the given mode.
259 static const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const ir_mode *mode)
261 if (mode_is_float(mode))
262 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp];
264 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp];
270 be_abi_call_flags_bits_t flags;
272 } TEMPLATE_abi_env_t;
274 static void *TEMPLATE_abi_init(const be_abi_call_t *call, ir_graph *irg)
276 TEMPLATE_abi_env_t *env = XMALLOC(TEMPLATE_abi_env_t);
277 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
278 env->flags = fl.bits;
284 * Get the between type for that call.
285 * @param self The callback object.
286 * @return The between type of for that call.
288 static ir_type *TEMPLATE_get_between_type(void *self)
290 static ir_type *between_type = NULL;
291 static ir_entity *old_bp_ent = NULL;
295 ir_entity *ret_addr_ent;
296 ir_type *ret_addr_type = new_type_primitive(mode_P);
297 ir_type *old_bp_type = new_type_primitive(mode_P);
299 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
300 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
301 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
303 set_entity_offset(old_bp_ent, 0);
304 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
305 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
312 * Build the prolog, return the BASE POINTER register
314 static const arch_register_t *TEMPLATE_abi_prologue(void *self, ir_node **mem,
315 pmap *reg_map, int *stack_bias)
317 TEMPLATE_abi_env_t *env = self;
318 const arch_env_t *arch_env = be_get_irg_arch_env(env->irg);
323 if (env->flags.try_omit_fp)
328 /* Build the epilog */
329 static void TEMPLATE_abi_epilogue(void *self, ir_node *bl, ir_node **mem,
338 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
341 TEMPLATE_get_between_type,
342 TEMPLATE_abi_prologue,
343 TEMPLATE_abi_epilogue,
347 * Get the ABI restrictions for procedure calls.
348 * @param self The this pointer.
349 * @param method_type The type of the method (procedure) in question.
350 * @param abi The abi object to be modified
352 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
357 int i, n = get_method_n_params(method_type);
358 be_abi_call_flags_t call_flags;
361 /* set abi flags for calls */
362 call_flags.bits.left_to_right = 0;
363 call_flags.bits.store_args_sequential = 1;
364 call_flags.bits.try_omit_fp = 1;
365 call_flags.bits.fp_free = 0;
366 call_flags.bits.call_has_imm = 1;
368 /* set stack parameter passing style */
369 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
371 for (i = 0; i < n; i++) {
372 /* TODO: implement register parameter: */
373 /* reg = get reg for param i; */
374 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
376 /* default: all parameters on stack */
377 tp = get_method_param_type(method_type, i);
378 mode = get_type_mode(tp);
379 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
382 /* TODO: set correct return register */
383 /* default: return value is in R0 resp. F0 */
384 if (get_method_n_ress(method_type) > 0) {
385 tp = get_method_res_type(method_type, 0);
386 mode = get_type_mode(tp);
388 be_abi_call_res_reg(abi, 0,
389 mode_is_float(mode) ? &TEMPLATE_fp_regs[REG_F0] : &TEMPLATE_gp_regs[REG_R0], ABI_CONTEXT_BOTH);
393 static int TEMPLATE_to_appear_in_schedule(void *block_env, const ir_node *irn)
397 if (!is_TEMPLATE_irn(irn))
404 * Initializes the code generator interface.
406 static const arch_code_generator_if_t *TEMPLATE_get_code_generator_if(
410 return &TEMPLATE_code_gen_if;
413 list_sched_selector_t TEMPLATE_sched_selector;
416 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
418 static const list_sched_selector_t *TEMPLATE_get_list_sched_selector(
419 const void *self, list_sched_selector_t *selector)
424 TEMPLATE_sched_selector = trivial_selector;
425 TEMPLATE_sched_selector.to_appear_in_schedule = TEMPLATE_to_appear_in_schedule;
426 return &TEMPLATE_sched_selector;
429 static const ilp_sched_selector_t *TEMPLATE_get_ilp_sched_selector(
437 * Returns the necessary byte alignment for storing a register of given class.
439 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
441 ir_mode *mode = arch_register_class_mode(cls);
442 return get_mode_size_bytes(mode);
445 static void TEMPLATE_lower_for_target(void)
450 * Returns the libFirm configuration parameter for this backend.
452 static const backend_params *TEMPLATE_get_backend_params(void)
454 static backend_params p = {
455 0, /* no inline assembly */
456 0, /* no support for Rotl nodes */
457 0, /* 0: little-endian, 1: big-endian */
458 TEMPLATE_lower_for_target, /* lowering for target */
459 NULL, /* architecture dependent settings, will be set later */
460 NULL, /* parameter for if conversion */
461 NULL, /* float arithmetic mode */
462 0, /* no trampoline support: size 0 */
463 0, /* no trampoline support: align 0 */
464 NULL, /* no trampoline support: no trampoline builder */
465 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
470 static const be_execution_unit_t ***TEMPLATE_get_allowed_execution_units(
478 static const be_machine_t *TEMPLATE_get_machine(const void *self)
485 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
493 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
496 return ASM_CONSTRAINT_FLAG_INVALID;
499 static int TEMPLATE_is_valid_clobber(const char *clobber)
505 const arch_isa_if_t TEMPLATE_isa_if = {
508 NULL, /* handle intrinsics */
509 TEMPLATE_get_n_reg_class,
510 TEMPLATE_get_reg_class,
511 TEMPLATE_get_reg_class_for_mode,
512 TEMPLATE_get_call_abi,
513 TEMPLATE_get_code_generator_if,
514 TEMPLATE_get_list_sched_selector,
515 TEMPLATE_get_ilp_sched_selector,
516 TEMPLATE_get_reg_class_alignment,
517 TEMPLATE_get_backend_params,
518 TEMPLATE_get_allowed_execution_units,
519 TEMPLATE_get_machine,
520 TEMPLATE_get_backend_irg_list,
521 NULL, /* mark remat */
522 TEMPLATE_parse_asm_constraint,
523 TEMPLATE_is_valid_clobber
526 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE);
527 void be_init_arch_TEMPLATE(void)
529 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
530 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
531 TEMPLATE_init_transform();