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)
58 return arch_irn_class_none;
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 extern const arch_isa_if_t TEMPLATE_isa_if;
141 static TEMPLATE_isa_t TEMPLATE_isa_template = {
143 &TEMPLATE_isa_if, /* isa interface implementation */
144 N_TEMPLATE_REGISTERS,
147 TEMPLATE_reg_classes,
148 &TEMPLATE_registers[REG_SP], /* stack pointer register */
149 &TEMPLATE_registers[REG_BP], /* base pointer register */
150 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
151 2, /* power of two stack alignment for calls, 2^2 == 4 */
152 NULL, /* main environment */
153 7, /* costs for a spill instruction */
154 5, /* costs for a reload instruction */
155 false, /* no custom abi handling */
160 * Initializes the backend ISA
162 static arch_env_t *TEMPLATE_init(FILE *outfile)
164 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
165 memcpy(isa, &TEMPLATE_isa_template, sizeof(*isa));
167 be_emit_init(outfile);
169 TEMPLATE_register_init();
170 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
176 * Closes the output file and frees the ISA structure.
178 static void TEMPLATE_done(void *self)
180 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t*)self;
182 /* emit now all global declarations */
183 be_gas_emit_decls(isa->base.main_env);
190 * Get the register class which shall be used to store a value of a given mode.
191 * @param self The this pointer.
192 * @param mode The mode in question.
193 * @return A register class which can hold values of the given mode.
195 static const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const ir_mode *mode)
197 if (mode_is_float(mode))
198 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp];
200 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp];
206 be_abi_call_flags_bits_t flags;
208 } TEMPLATE_abi_env_t;
210 static void *TEMPLATE_abi_init(const be_abi_call_t *call, ir_graph *irg)
212 TEMPLATE_abi_env_t *env = XMALLOC(TEMPLATE_abi_env_t);
213 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
214 env->flags = fl.bits;
220 * Get the between type for that call.
221 * @param self The callback object.
222 * @return The between type of for that call.
224 static ir_type *TEMPLATE_get_between_type(void *self)
226 static ir_type *between_type = NULL;
227 static ir_entity *old_bp_ent = NULL;
231 ir_entity *ret_addr_ent;
232 ir_type *ret_addr_type = new_type_primitive(mode_P);
233 ir_type *old_bp_type = new_type_primitive(mode_P);
235 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
236 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
237 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
239 set_entity_offset(old_bp_ent, 0);
240 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
241 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
248 * Build the prolog, return the BASE POINTER register
250 static const arch_register_t *TEMPLATE_abi_prologue(void *self, ir_node **mem,
251 pmap *reg_map, int *stack_bias)
253 TEMPLATE_abi_env_t *env = (TEMPLATE_abi_env_t*)self;
254 const arch_env_t *arch_env = be_get_irg_arch_env(env->irg);
259 if (env->flags.try_omit_fp)
264 /* Build the epilog */
265 static void TEMPLATE_abi_epilogue(void *self, ir_node *bl, ir_node **mem,
274 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
277 TEMPLATE_get_between_type,
278 TEMPLATE_abi_prologue,
279 TEMPLATE_abi_epilogue,
283 * Get the ABI restrictions for procedure calls.
284 * @param self The this pointer.
285 * @param method_type The type of the method (procedure) in question.
286 * @param abi The abi object to be modified
288 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
293 int i, n = get_method_n_params(method_type);
294 be_abi_call_flags_t call_flags;
297 /* set abi flags for calls */
298 call_flags.bits.left_to_right = 0;
299 call_flags.bits.store_args_sequential = 1;
300 call_flags.bits.try_omit_fp = 1;
301 call_flags.bits.fp_free = 0;
302 call_flags.bits.call_has_imm = 1;
304 /* set stack parameter passing style */
305 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
307 for (i = 0; i < n; i++) {
308 /* TODO: implement register parameter: */
309 /* reg = get reg for param i; */
310 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
312 /* default: all parameters on stack */
313 tp = get_method_param_type(method_type, i);
314 mode = get_type_mode(tp);
315 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
318 /* TODO: set correct return register */
319 /* default: return value is in R0 resp. F0 */
320 if (get_method_n_ress(method_type) > 0) {
321 tp = get_method_res_type(method_type, 0);
322 mode = get_type_mode(tp);
324 be_abi_call_res_reg(abi, 0,
325 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
330 * Returns the necessary byte alignment for storing a register of given class.
332 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
334 ir_mode *mode = arch_register_class_mode(cls);
335 return get_mode_size_bytes(mode);
338 static void TEMPLATE_lower_for_target(void)
340 lower_params_t params = {
341 4, /* def_ptr_alignment */
342 LF_COMPOUND_RETURN | LF_RETURN_HIDDEN, /* flags */
343 ADD_HIDDEN_ALWAYS_IN_FRONT, /* hidden_params */
344 NULL, /* find pointer type */
345 NULL, /* ret_compound_in_regs */
348 /* lower compound param handling */
349 lower_calls_with_compounds(¶ms);
352 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
362 * Returns the libFirm configuration parameter for this backend.
364 static const backend_params *TEMPLATE_get_backend_params(void)
366 static backend_params p = {
367 0, /* no inline assembly */
368 0, /* no support for Rotl nodes */
369 0, /* 0: little-endian, 1: big-endian */
370 NULL, /* architecture dependent settings, will be set later */
371 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
372 NULL, /* float arithmetic mode */
373 0, /* no trampoline support: size 0 */
374 0, /* no trampoline support: align 0 */
375 NULL, /* no trampoline support: no trampoline builder */
376 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
381 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
389 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
392 return ASM_CONSTRAINT_FLAG_INVALID;
395 static int TEMPLATE_is_valid_clobber(const char *clobber)
401 const arch_isa_if_t TEMPLATE_isa_if = {
403 TEMPLATE_lower_for_target,
405 NULL, /* handle intrinsics */
406 TEMPLATE_get_reg_class_for_mode,
407 TEMPLATE_get_call_abi,
408 TEMPLATE_get_reg_class_alignment,
409 TEMPLATE_get_backend_params,
410 TEMPLATE_get_backend_irg_list,
411 NULL, /* mark remat */
412 TEMPLATE_parse_asm_constraint,
413 TEMPLATE_is_valid_clobber,
416 NULL, /* get_pic_base */
417 NULL, /* before_abi */
418 TEMPLATE_prepare_graph,
422 TEMPLATE_emit_routine,
425 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE);
426 void be_init_arch_TEMPLATE(void)
428 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
429 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
430 TEMPLATE_init_transform();