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(ir_graph *irg)
106 /* transform nodes into assembler instructions */
107 TEMPLATE_transform_graph(irg);
113 * Called immediatly before emit phase.
115 static void TEMPLATE_finish_irg(ir_graph *irg)
121 static void TEMPLATE_before_ra(ir_graph *irg)
124 /* Some stuff you need to do after scheduling but before register allocation */
127 static void TEMPLATE_after_ra(ir_graph *irg)
130 /* Some stuff you need to do immediatly after register allocation */
133 static void TEMPLATE_init_graph(ir_graph *irg)
140 const arch_isa_if_t TEMPLATE_isa_if;
141 static TEMPLATE_isa_t TEMPLATE_isa_template = {
143 &TEMPLATE_isa_if, /* isa interface implementation */
144 &TEMPLATE_gp_regs[REG_SP], /* stack pointer register */
145 &TEMPLATE_gp_regs[REG_BP], /* base pointer register */
146 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
147 -1, /* stack direction */
148 2, /* power of two stack alignment for calls, 2^2 == 4 */
149 NULL, /* main environment */
150 7, /* costs for a spill instruction */
151 5, /* costs for a reload instruction */
152 false, /* no custom abi handling */
157 * Initializes the backend ISA
159 static arch_env_t *TEMPLATE_init(FILE *outfile)
161 static int run_once = 0;
168 isa = XMALLOC(TEMPLATE_isa_t);
169 memcpy(isa, &TEMPLATE_isa_template, sizeof(*isa));
171 be_emit_init(outfile);
173 TEMPLATE_register_init();
174 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
182 * Closes the output file and frees the ISA structure.
184 static void TEMPLATE_done(void *self)
186 TEMPLATE_isa_t *isa = self;
188 /* emit now all global declarations */
189 be_gas_emit_decls(isa->base.main_env);
196 static unsigned TEMPLATE_get_n_reg_class(void)
201 static const arch_register_class_t *TEMPLATE_get_reg_class(unsigned i)
203 assert(i < N_CLASSES);
204 return &TEMPLATE_reg_classes[i];
210 * Get the register class which shall be used to store a value of a given mode.
211 * @param self The this pointer.
212 * @param mode The mode in question.
213 * @return A register class which can hold values of the given mode.
215 static const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const ir_mode *mode)
217 if (mode_is_float(mode))
218 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp];
220 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp];
226 be_abi_call_flags_bits_t flags;
228 } TEMPLATE_abi_env_t;
230 static void *TEMPLATE_abi_init(const be_abi_call_t *call, ir_graph *irg)
232 TEMPLATE_abi_env_t *env = XMALLOC(TEMPLATE_abi_env_t);
233 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
234 env->flags = fl.bits;
240 * Get the between type for that call.
241 * @param self The callback object.
242 * @return The between type of for that call.
244 static ir_type *TEMPLATE_get_between_type(void *self)
246 static ir_type *between_type = NULL;
247 static ir_entity *old_bp_ent = NULL;
251 ir_entity *ret_addr_ent;
252 ir_type *ret_addr_type = new_type_primitive(mode_P);
253 ir_type *old_bp_type = new_type_primitive(mode_P);
255 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
256 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
257 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
259 set_entity_offset(old_bp_ent, 0);
260 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
261 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
268 * Build the prolog, return the BASE POINTER register
270 static const arch_register_t *TEMPLATE_abi_prologue(void *self, ir_node **mem,
271 pmap *reg_map, int *stack_bias)
273 TEMPLATE_abi_env_t *env = self;
274 const arch_env_t *arch_env = be_get_irg_arch_env(env->irg);
279 if (env->flags.try_omit_fp)
284 /* Build the epilog */
285 static void TEMPLATE_abi_epilogue(void *self, ir_node *bl, ir_node **mem,
294 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
297 TEMPLATE_get_between_type,
298 TEMPLATE_abi_prologue,
299 TEMPLATE_abi_epilogue,
303 * Get the ABI restrictions for procedure calls.
304 * @param self The this pointer.
305 * @param method_type The type of the method (procedure) in question.
306 * @param abi The abi object to be modified
308 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
313 int i, n = get_method_n_params(method_type);
314 be_abi_call_flags_t call_flags;
317 /* set abi flags for calls */
318 call_flags.bits.left_to_right = 0;
319 call_flags.bits.store_args_sequential = 1;
320 call_flags.bits.try_omit_fp = 1;
321 call_flags.bits.fp_free = 0;
322 call_flags.bits.call_has_imm = 1;
324 /* set stack parameter passing style */
325 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
327 for (i = 0; i < n; i++) {
328 /* TODO: implement register parameter: */
329 /* reg = get reg for param i; */
330 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
332 /* default: all parameters on stack */
333 tp = get_method_param_type(method_type, i);
334 mode = get_type_mode(tp);
335 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
338 /* TODO: set correct return register */
339 /* default: return value is in R0 resp. F0 */
340 if (get_method_n_ress(method_type) > 0) {
341 tp = get_method_res_type(method_type, 0);
342 mode = get_type_mode(tp);
344 be_abi_call_res_reg(abi, 0,
345 mode_is_float(mode) ? &TEMPLATE_fp_regs[REG_F0] : &TEMPLATE_gp_regs[REG_R0], ABI_CONTEXT_BOTH);
350 * Returns the necessary byte alignment for storing a register of given class.
352 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
354 ir_mode *mode = arch_register_class_mode(cls);
355 return get_mode_size_bytes(mode);
358 static void TEMPLATE_lower_for_target(void)
363 * Returns the libFirm configuration parameter for this backend.
365 static const backend_params *TEMPLATE_get_backend_params(void)
367 static backend_params p = {
368 0, /* no inline assembly */
369 0, /* no support for Rotl nodes */
370 0, /* 0: little-endian, 1: big-endian */
371 TEMPLATE_lower_for_target, /* lowering for target */
372 NULL, /* architecture dependent settings, will be set later */
373 NULL, /* parameter for if conversion */
374 NULL, /* float arithmetic mode */
375 0, /* no trampoline support: size 0 */
376 0, /* no trampoline support: align 0 */
377 NULL, /* no trampoline support: no trampoline builder */
378 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
383 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
391 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
394 return ASM_CONSTRAINT_FLAG_INVALID;
397 static int TEMPLATE_is_valid_clobber(const char *clobber)
403 const arch_isa_if_t TEMPLATE_isa_if = {
406 NULL, /* handle intrinsics */
407 TEMPLATE_get_n_reg_class,
408 TEMPLATE_get_reg_class,
409 TEMPLATE_get_reg_class_for_mode,
410 TEMPLATE_get_call_abi,
411 TEMPLATE_get_reg_class_alignment,
412 TEMPLATE_get_backend_params,
413 TEMPLATE_get_backend_irg_list,
414 NULL, /* mark remat */
415 TEMPLATE_parse_asm_constraint,
416 TEMPLATE_is_valid_clobber,
419 NULL, /* get_pic_base */
420 NULL, /* before_abi */
421 TEMPLATE_prepare_graph,
425 TEMPLATE_emit_routine,
428 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE);
429 void be_init_arch_TEMPLATE(void)
431 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
432 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
433 TEMPLATE_init_transform();