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 = {
90 TEMPLATE_get_frame_entity,
91 TEMPLATE_set_frame_offset,
93 NULL, /* get_inverse */
94 NULL, /* get_op_estimated_cost */
95 NULL, /* possible_memory_operand */
96 NULL, /* perform_memory_operand */
102 * Transforms the standard firm graph into
103 * a TEMLPATE firm graph
105 static void TEMPLATE_prepare_graph(void *self)
107 TEMPLATE_code_gen_t *cg = self;
109 /* transform nodes into assembler instructions */
110 TEMPLATE_transform_graph(cg);
116 * Called immediatly before emit phase.
118 static void TEMPLATE_finish_irg(void *self)
124 static void TEMPLATE_before_ra(void *self)
127 /* Some stuff you need to do after scheduling but before register allocation */
130 static void TEMPLATE_after_ra(void *self)
133 /* Some stuff you need to do immediatly after register allocation */
139 * Emits the code, closes the output file and frees
140 * the code generator interface.
142 static void TEMPLATE_emit_and_done(void *self)
144 TEMPLATE_code_gen_t *cg = self;
145 ir_graph *irg = cg->irg;
147 TEMPLATE_emit_routine(irg);
149 /* de-allocate code generator */
153 static void *TEMPLATE_cg_init(ir_graph *irg);
155 static const arch_code_generator_if_t TEMPLATE_code_gen_if = {
157 NULL, /* get_pic_base hook */
158 NULL, /* before abi introduce hook */
159 TEMPLATE_prepare_graph,
160 NULL, /* spill hook */
161 TEMPLATE_before_ra, /* before register allocation hook */
162 TEMPLATE_after_ra, /* after register allocation hook */
164 TEMPLATE_emit_and_done
168 * Initializes the code generator.
170 static void *TEMPLATE_cg_init(ir_graph *irg)
172 const arch_env_t *arch_env = be_get_irg_arch_env(irg);
173 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t *) arch_env;
174 TEMPLATE_code_gen_t *cg = XMALLOC(TEMPLATE_code_gen_t);
176 cg->impl = &TEMPLATE_code_gen_if;
180 return (arch_code_generator_t *)cg;
185 const arch_isa_if_t TEMPLATE_isa_if;
186 static TEMPLATE_isa_t TEMPLATE_isa_template = {
188 &TEMPLATE_isa_if, /* isa interface implementation */
189 &TEMPLATE_gp_regs[REG_SP], /* stack pointer register */
190 &TEMPLATE_gp_regs[REG_BP], /* base pointer register */
191 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
192 -1, /* stack direction */
193 2, /* power of two stack alignment for calls, 2^2 == 4 */
194 NULL, /* main environment */
195 7, /* costs for a spill instruction */
196 5, /* costs for a reload instruction */
197 false, /* no custom abi handling */
202 * Initializes the backend ISA
204 static arch_env_t *TEMPLATE_init(FILE *outfile)
206 static int run_once = 0;
213 isa = XMALLOC(TEMPLATE_isa_t);
214 memcpy(isa, &TEMPLATE_isa_template, sizeof(*isa));
216 be_emit_init(outfile);
218 TEMPLATE_register_init();
219 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
227 * Closes the output file and frees the ISA structure.
229 static void TEMPLATE_done(void *self)
231 TEMPLATE_isa_t *isa = self;
233 /* emit now all global declarations */
234 be_gas_emit_decls(isa->base.main_env);
241 static unsigned TEMPLATE_get_n_reg_class(void)
246 static const arch_register_class_t *TEMPLATE_get_reg_class(unsigned i)
248 assert(i < N_CLASSES);
249 return &TEMPLATE_reg_classes[i];
255 * Get the register class which shall be used to store a value of a given mode.
256 * @param self The this pointer.
257 * @param mode The mode in question.
258 * @return A register class which can hold values of the given mode.
260 static const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const ir_mode *mode)
262 if (mode_is_float(mode))
263 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp];
265 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp];
271 be_abi_call_flags_bits_t flags;
273 } TEMPLATE_abi_env_t;
275 static void *TEMPLATE_abi_init(const be_abi_call_t *call, ir_graph *irg)
277 TEMPLATE_abi_env_t *env = XMALLOC(TEMPLATE_abi_env_t);
278 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
279 env->flags = fl.bits;
285 * Get the between type for that call.
286 * @param self The callback object.
287 * @return The between type of for that call.
289 static ir_type *TEMPLATE_get_between_type(void *self)
291 static ir_type *between_type = NULL;
292 static ir_entity *old_bp_ent = NULL;
296 ir_entity *ret_addr_ent;
297 ir_type *ret_addr_type = new_type_primitive(mode_P);
298 ir_type *old_bp_type = new_type_primitive(mode_P);
300 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
301 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
302 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
304 set_entity_offset(old_bp_ent, 0);
305 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
306 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
313 * Build the prolog, return the BASE POINTER register
315 static const arch_register_t *TEMPLATE_abi_prologue(void *self, ir_node **mem,
316 pmap *reg_map, int *stack_bias)
318 TEMPLATE_abi_env_t *env = self;
319 const arch_env_t *arch_env = be_get_irg_arch_env(env->irg);
324 if (env->flags.try_omit_fp)
329 /* Build the epilog */
330 static void TEMPLATE_abi_epilogue(void *self, ir_node *bl, ir_node **mem,
339 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
342 TEMPLATE_get_between_type,
343 TEMPLATE_abi_prologue,
344 TEMPLATE_abi_epilogue,
348 * Get the ABI restrictions for procedure calls.
349 * @param self The this pointer.
350 * @param method_type The type of the method (procedure) in question.
351 * @param abi The abi object to be modified
353 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
358 int i, n = get_method_n_params(method_type);
359 be_abi_call_flags_t call_flags;
362 /* set abi flags for calls */
363 call_flags.bits.left_to_right = 0;
364 call_flags.bits.store_args_sequential = 1;
365 call_flags.bits.try_omit_fp = 1;
366 call_flags.bits.fp_free = 0;
367 call_flags.bits.call_has_imm = 1;
369 /* set stack parameter passing style */
370 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
372 for (i = 0; i < n; i++) {
373 /* TODO: implement register parameter: */
374 /* reg = get reg for param i; */
375 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
377 /* default: all parameters on stack */
378 tp = get_method_param_type(method_type, i);
379 mode = get_type_mode(tp);
380 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
383 /* TODO: set correct return register */
384 /* default: return value is in R0 resp. F0 */
385 if (get_method_n_ress(method_type) > 0) {
386 tp = get_method_res_type(method_type, 0);
387 mode = get_type_mode(tp);
389 be_abi_call_res_reg(abi, 0,
390 mode_is_float(mode) ? &TEMPLATE_fp_regs[REG_F0] : &TEMPLATE_gp_regs[REG_R0], ABI_CONTEXT_BOTH);
394 static int TEMPLATE_to_appear_in_schedule(void *block_env, const ir_node *irn)
398 if (!is_TEMPLATE_irn(irn))
405 * Initializes the code generator interface.
407 static const arch_code_generator_if_t *TEMPLATE_get_code_generator_if(
411 return &TEMPLATE_code_gen_if;
414 list_sched_selector_t TEMPLATE_sched_selector;
417 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
419 static const list_sched_selector_t *TEMPLATE_get_list_sched_selector(
420 const void *self, list_sched_selector_t *selector)
425 TEMPLATE_sched_selector = trivial_selector;
426 TEMPLATE_sched_selector.to_appear_in_schedule = TEMPLATE_to_appear_in_schedule;
427 return &TEMPLATE_sched_selector;
430 static const ilp_sched_selector_t *TEMPLATE_get_ilp_sched_selector(
438 * Returns the necessary byte alignment for storing a register of given class.
440 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
442 ir_mode *mode = arch_register_class_mode(cls);
443 return get_mode_size_bytes(mode);
446 static void TEMPLATE_lower_for_target(void)
451 * Returns the libFirm configuration parameter for this backend.
453 static const backend_params *TEMPLATE_get_backend_params(void)
455 static backend_params p = {
456 0, /* no inline assembly */
457 0, /* no support for Rotl nodes */
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();