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 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];
204 * Get the between type for that call.
205 * @param self The callback object.
206 * @return The between type of for that call.
208 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
210 static ir_type *between_type = NULL;
211 static ir_entity *old_bp_ent = NULL;
215 ir_entity *ret_addr_ent;
216 ir_type *ret_addr_type = new_type_primitive(mode_P);
217 ir_type *old_bp_type = new_type_primitive(mode_P);
219 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
220 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
221 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
223 set_entity_offset(old_bp_ent, 0);
224 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
225 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
231 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
232 TEMPLATE_get_between_type,
236 * Get the ABI restrictions for procedure calls.
237 * @param self The this pointer.
238 * @param method_type The type of the method (procedure) in question.
239 * @param abi The abi object to be modified
241 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
246 int i, n = get_method_n_params(method_type);
247 be_abi_call_flags_t call_flags;
250 /* set abi flags for calls */
251 call_flags.bits.store_args_sequential = 1;
252 call_flags.bits.try_omit_fp = 1;
253 call_flags.bits.fp_free = 0;
254 call_flags.bits.call_has_imm = 1;
256 /* set stack parameter passing style */
257 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
259 for (i = 0; i < n; i++) {
260 /* TODO: implement register parameter: */
261 /* reg = get reg for param i; */
262 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
264 /* default: all parameters on stack */
265 tp = get_method_param_type(method_type, i);
266 mode = get_type_mode(tp);
267 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
270 /* TODO: set correct return register */
271 /* default: return value is in R0 resp. F0 */
272 if (get_method_n_ress(method_type) > 0) {
273 tp = get_method_res_type(method_type, 0);
274 mode = get_type_mode(tp);
276 be_abi_call_res_reg(abi, 0,
277 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
282 * Returns the necessary byte alignment for storing a register of given class.
284 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
286 ir_mode *mode = arch_register_class_mode(cls);
287 return get_mode_size_bytes(mode);
290 static void TEMPLATE_lower_for_target(void)
292 lower_builtins(0, NULL);
294 /* lower compound param handling */
295 lower_calls_with_compounds(LF_RETURN_HIDDEN);
298 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
308 * Returns the libFirm configuration parameter for this backend.
310 static const backend_params *TEMPLATE_get_backend_params(void)
312 static backend_params p = {
313 0, /* no inline assembly */
314 0, /* no support for Rotl nodes */
315 0, /* 0: little-endian, 1: big-endian */
316 1, /* modulo shift efficient */
317 0, /* non-modulo shift efficient */
318 NULL, /* architecture dependent settings, will be set later */
319 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
320 32, /* machine size - a 32bit CPU */
321 NULL, /* float arithmetic mode */
322 NULL, /* long long type */
323 NULL, /* unsigned long long type */
324 NULL, /* long double type */
325 0, /* no trampoline support: size 0 */
326 0, /* no trampoline support: align 0 */
327 NULL, /* no trampoline support: no trampoline builder */
328 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
333 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
341 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
344 return ASM_CONSTRAINT_FLAG_INVALID;
347 static int TEMPLATE_is_valid_clobber(const char *clobber)
354 * Check if the given register is callee or caller save.
356 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
359 /* check for callee saved */
360 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
361 switch (reg->index) {
375 /* check for caller saved */
376 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
377 switch (reg->index) {
389 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
390 /* all FP registers are caller save */
397 const arch_isa_if_t TEMPLATE_isa_if = {
399 TEMPLATE_lower_for_target,
401 NULL, /* handle intrinsics */
402 TEMPLATE_get_reg_class_for_mode,
403 TEMPLATE_get_call_abi,
404 TEMPLATE_get_reg_class_alignment,
405 TEMPLATE_get_backend_params,
406 TEMPLATE_get_backend_irg_list,
407 NULL, /* mark remat */
408 TEMPLATE_parse_asm_constraint,
409 TEMPLATE_is_valid_clobber,
412 NULL, /* get_pic_base */
413 NULL, /* before_abi */
414 TEMPLATE_prepare_graph,
417 TEMPLATE_emit_routine,
418 TEMPLATE_register_saved_by,
423 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
424 void be_init_arch_TEMPLATE(void)
426 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
427 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
428 TEMPLATE_init_transform();