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.
26 #include "bearch_TEMPLATE_t.h"
33 #include "lower_calls.h"
34 #include "lower_builtins.h"
47 #include "belistsched.h"
49 #include "bespillutil.h"
51 #include "TEMPLATE_new_nodes.h"
52 #include "gen_TEMPLATE_regalloc_if.h"
53 #include "TEMPLATE_transform.h"
54 #include "TEMPLATE_emitter.h"
56 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
58 static arch_irn_class_t TEMPLATE_classify(const ir_node *irn)
61 return arch_irn_class_none;
64 static ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
67 /* TODO: return the ir_entity assigned to the frame */
72 * This function is called by the generic backend to correct offsets for
73 * nodes accessing the stack.
75 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
79 /* TODO: correct offset if irn accesses the stack */
82 static int TEMPLATE_get_sp_bias(const ir_node *irn)
88 /* fill register allocator interface */
90 static const arch_irn_ops_t TEMPLATE_irn_ops = {
92 TEMPLATE_get_frame_entity,
93 TEMPLATE_set_frame_offset,
95 NULL, /* get_inverse */
96 NULL, /* get_op_estimated_cost */
97 NULL, /* possible_memory_operand */
98 NULL, /* perform_memory_operand */
104 * Transforms the standard firm graph into
105 * a TEMLPATE firm graph
107 static void TEMPLATE_prepare_graph(ir_graph *irg)
109 /* transform nodes into assembler instructions */
110 TEMPLATE_transform_graph(irg);
116 * Called immediatly before emit phase.
118 static void TEMPLATE_finish_irg(ir_graph *irg)
120 /* fix stack entity offsets */
121 be_abi_fix_stack_nodes(irg);
122 be_abi_fix_stack_bias(irg);
126 static void TEMPLATE_before_ra(ir_graph *irg)
129 /* Some stuff you need to do after scheduling but before register allocation */
132 static void TEMPLATE_init_graph(ir_graph *irg)
139 extern const arch_isa_if_t TEMPLATE_isa_if;
140 static TEMPLATE_isa_t TEMPLATE_isa_template = {
142 &TEMPLATE_isa_if, /* isa interface implementation */
143 N_TEMPLATE_REGISTERS,
146 TEMPLATE_reg_classes,
147 &TEMPLATE_registers[REG_SP], /* stack pointer register */
148 &TEMPLATE_registers[REG_BP], /* base pointer register */
149 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
150 2, /* power of two stack alignment for calls, 2^2 == 4 */
151 NULL, /* main environment */
152 7, /* costs for a spill instruction */
153 5, /* costs for a reload instruction */
154 false, /* no custom abi handling */
159 * Initializes the backend ISA
161 static arch_env_t *TEMPLATE_init(const be_main_env_t *env)
163 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
164 *isa = TEMPLATE_isa_template;
166 TEMPLATE_register_init();
167 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
169 be_emit_init(env->file_handle);
170 be_gas_begin_compilation_unit(env);
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_end_compilation_unit(isa->base.main_env);
190 * Get the between type for that call.
191 * @param self The callback object.
192 * @return The between type of for that call.
194 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
196 static ir_type *between_type = NULL;
197 static ir_entity *old_bp_ent = NULL;
201 ir_entity *ret_addr_ent;
202 ir_type *ret_addr_type = new_type_primitive(mode_P);
203 ir_type *old_bp_type = new_type_primitive(mode_P);
205 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
206 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
207 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
209 set_entity_offset(old_bp_ent, 0);
210 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
211 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
217 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
218 TEMPLATE_get_between_type,
222 * Get the ABI restrictions for procedure calls.
223 * @param self The this pointer.
224 * @param method_type The type of the method (procedure) in question.
225 * @param abi The abi object to be modified
227 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
232 int i, n = get_method_n_params(method_type);
233 be_abi_call_flags_t call_flags;
236 /* set abi flags for calls */
237 call_flags.bits.store_args_sequential = 1;
238 call_flags.bits.try_omit_fp = 1;
239 call_flags.bits.fp_free = 0;
240 call_flags.bits.call_has_imm = 1;
242 /* set stack parameter passing style */
243 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
245 for (i = 0; i < n; i++) {
246 /* TODO: implement register parameter: */
247 /* reg = get reg for param i; */
248 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
250 /* default: all parameters on stack */
251 tp = get_method_param_type(method_type, i);
252 mode = get_type_mode(tp);
253 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
256 /* TODO: set correct return register */
257 /* default: return value is in R0 resp. F0 */
258 if (get_method_n_ress(method_type) > 0) {
259 tp = get_method_res_type(method_type, 0);
260 mode = get_type_mode(tp);
262 be_abi_call_res_reg(abi, 0,
263 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
267 static void TEMPLATE_lower_for_target(void)
269 lower_builtins(0, NULL);
271 /* lower compound param handling */
272 lower_calls_with_compounds(LF_RETURN_HIDDEN);
275 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
285 * Returns the libFirm configuration parameter for this backend.
287 static const backend_params *TEMPLATE_get_backend_params(void)
289 static backend_params p = {
290 0, /* no inline assembly */
291 0, /* no support for Rotl nodes */
292 0, /* 0: little-endian, 1: big-endian */
293 1, /* modulo shift efficient */
294 0, /* non-modulo shift efficient */
295 NULL, /* architecture dependent settings, will be set later */
296 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
297 32, /* machine size - a 32bit CPU */
298 NULL, /* float arithmetic mode */
299 NULL, /* long long type */
300 NULL, /* unsigned long long type */
301 NULL, /* long double type */
302 0, /* no trampoline support: size 0 */
303 0, /* no trampoline support: align 0 */
304 NULL, /* no trampoline support: no trampoline builder */
305 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
310 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
313 return ASM_CONSTRAINT_FLAG_INVALID;
316 static int TEMPLATE_is_valid_clobber(const char *clobber)
323 * Check if the given register is callee or caller save.
325 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
328 /* check for callee saved */
329 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
330 switch (reg->index) {
344 /* check for caller saved */
345 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
346 switch (reg->index) {
358 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
359 /* all FP registers are caller save */
366 const arch_isa_if_t TEMPLATE_isa_if = {
368 TEMPLATE_lower_for_target,
370 NULL, /* handle intrinsics */
371 TEMPLATE_get_call_abi,
372 TEMPLATE_get_backend_params,
373 NULL, /* mark remat */
374 TEMPLATE_parse_asm_constraint,
375 TEMPLATE_is_valid_clobber,
378 NULL, /* get_pic_base */
379 NULL, /* before_abi */
380 TEMPLATE_prepare_graph,
383 TEMPLATE_emit_routine,
384 TEMPLATE_register_saved_by,
389 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
390 void be_init_arch_TEMPLATE(void)
392 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
393 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
394 TEMPLATE_init_transform();