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 ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
61 /* TODO: return the ir_entity assigned to the frame */
66 * This function is called by the generic backend to correct offsets for
67 * nodes accessing the stack.
69 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
73 /* TODO: correct offset if irn accesses the stack */
76 static int TEMPLATE_get_sp_bias(const ir_node *irn)
82 /* fill register allocator interface */
84 static const arch_irn_ops_t TEMPLATE_irn_ops = {
85 TEMPLATE_get_frame_entity,
86 TEMPLATE_set_frame_offset,
88 NULL, /* get_inverse */
89 NULL, /* get_op_estimated_cost */
90 NULL, /* possible_memory_operand */
91 NULL, /* perform_memory_operand */
97 * Transforms the standard firm graph into
98 * a TEMLPATE firm graph
100 static void TEMPLATE_prepare_graph(ir_graph *irg)
102 /* transform nodes into assembler instructions */
103 TEMPLATE_transform_graph(irg);
109 * Called immediatly before emit phase.
111 static void TEMPLATE_finish_irg(ir_graph *irg)
113 /* fix stack entity offsets */
114 be_abi_fix_stack_nodes(irg);
115 be_abi_fix_stack_bias(irg);
119 static void TEMPLATE_before_ra(ir_graph *irg)
122 /* Some stuff you need to do after scheduling but before register allocation */
125 static void TEMPLATE_init_graph(ir_graph *irg)
132 extern const arch_isa_if_t TEMPLATE_isa_if;
133 static TEMPLATE_isa_t TEMPLATE_isa_template = {
135 &TEMPLATE_isa_if, /* isa interface implementation */
136 N_TEMPLATE_REGISTERS,
139 TEMPLATE_reg_classes,
140 &TEMPLATE_registers[REG_SP], /* stack pointer register */
141 &TEMPLATE_registers[REG_BP], /* base pointer register */
142 2, /* power of two stack alignment for calls, 2^2 == 4 */
143 NULL, /* main environment */
144 7, /* costs for a spill instruction */
145 5, /* costs for a reload instruction */
146 true, /* no custom abi handling */
150 static void TEMPLATE_init(void)
152 TEMPLATE_register_init();
153 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
156 static void TEMPLATE_finish(void)
158 TEMPLATE_free_opcodes();
161 static arch_env_t *TEMPLATE_begin_codegeneration(const be_main_env_t *env)
163 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
164 *isa = TEMPLATE_isa_template;
166 be_emit_init(env->file_handle);
167 be_gas_begin_compilation_unit(env);
173 * Closes the output file and frees the ISA structure.
175 static void TEMPLATE_end_codegeneration(void *self)
177 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t*)self;
179 /* emit now all global declarations */
180 be_gas_end_compilation_unit(isa->base.main_env);
187 * Get the between type for that call.
188 * @param self The callback object.
189 * @return The between type of for that call.
191 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
193 static ir_type *between_type = NULL;
194 static ir_entity *old_bp_ent = NULL;
198 ir_entity *ret_addr_ent;
199 ir_type *ret_addr_type = new_type_primitive(mode_P);
200 ir_type *old_bp_type = new_type_primitive(mode_P);
202 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
203 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
204 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
206 set_entity_offset(old_bp_ent, 0);
207 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
208 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
214 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
215 TEMPLATE_get_between_type,
219 * Get the ABI restrictions for procedure calls.
220 * @param self The this pointer.
221 * @param method_type The type of the method (procedure) in question.
222 * @param abi The abi object to be modified
224 static void TEMPLATE_get_call_abi(ir_type *method_type, be_abi_call_t *abi)
228 int i, n = get_method_n_params(method_type);
230 /* set abi flags for calls */
231 be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
232 call_flags.call_has_imm = true;
233 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
235 for (i = 0; i < n; i++) {
236 /* TODO: implement register parameter: */
237 /* reg = get reg for param i; */
238 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
240 /* default: all parameters on stack */
241 tp = get_method_param_type(method_type, i);
242 mode = get_type_mode(tp);
243 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
246 /* TODO: set correct return register */
247 /* default: return value is in R0 resp. F0 */
248 if (get_method_n_ress(method_type) > 0) {
249 tp = get_method_res_type(method_type, 0);
250 mode = get_type_mode(tp);
252 be_abi_call_res_reg(abi, 0,
253 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
257 static void TEMPLATE_lower_for_target(void)
259 lower_builtins(0, NULL);
261 /* lower compound param handling */
262 lower_calls_with_compounds(LF_RETURN_HIDDEN);
265 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
275 * Returns the libFirm configuration parameter for this backend.
277 static const backend_params *TEMPLATE_get_backend_params(void)
279 static backend_params p = {
280 0, /* no inline assembly */
281 0, /* no support for Rotl nodes */
282 0, /* 0: little-endian, 1: big-endian */
283 1, /* modulo shift efficient */
284 0, /* non-modulo shift efficient */
285 NULL, /* architecture dependent settings, will be set later */
286 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
287 32, /* machine size - a 32bit CPU */
288 NULL, /* float arithmetic mode */
289 NULL, /* long long type */
290 NULL, /* unsigned long long type */
291 NULL, /* long double type */
292 0, /* no trampoline support: size 0 */
293 0, /* no trampoline support: align 0 */
294 NULL, /* no trampoline support: no trampoline builder */
295 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
300 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
303 return ASM_CONSTRAINT_FLAG_INVALID;
306 static int TEMPLATE_is_valid_clobber(const char *clobber)
313 * Check if the given register is callee or caller save.
315 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
318 /* check for callee saved */
319 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
320 switch (reg->index) {
334 /* check for caller saved */
335 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
336 switch (reg->index) {
348 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
349 /* all FP registers are caller save */
356 const arch_isa_if_t TEMPLATE_isa_if = {
359 TEMPLATE_get_backend_params,
360 TEMPLATE_lower_for_target,
361 TEMPLATE_parse_asm_constraint,
362 TEMPLATE_is_valid_clobber,
364 TEMPLATE_begin_codegeneration,
365 TEMPLATE_end_codegeneration,
367 TEMPLATE_get_call_abi,
368 NULL, /* mark remat */
369 NULL, /* get_pic_base */
372 TEMPLATE_register_saved_by,
374 NULL, /* handle intrinsics */
375 NULL, /* before_abi */
376 TEMPLATE_prepare_graph,
379 TEMPLATE_emit_routine,
382 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
383 void be_init_arch_TEMPLATE(void)
385 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
386 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
387 TEMPLATE_init_transform();