2 * This file is part of libFirm.
3 * Copyright (C) 2012 University of Karlsruhe.
8 * @brief The main TEMPLATE backend driver file.
12 #include "bearch_TEMPLATE_t.h"
19 #include "lower_calls.h"
20 #include "lower_builtins.h"
33 #include "belistsched.h"
35 #include "bespillutil.h"
37 #include "TEMPLATE_new_nodes.h"
38 #include "gen_TEMPLATE_regalloc_if.h"
39 #include "TEMPLATE_transform.h"
40 #include "TEMPLATE_emitter.h"
42 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
44 static ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
47 /* TODO: return the ir_entity assigned to the frame */
52 * This function is called by the generic backend to correct offsets for
53 * nodes accessing the stack.
55 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
59 /* TODO: correct offset if irn accesses the stack */
62 static int TEMPLATE_get_sp_bias(const ir_node *irn)
68 /* fill register allocator interface */
70 static const arch_irn_ops_t TEMPLATE_irn_ops = {
71 TEMPLATE_get_frame_entity,
72 TEMPLATE_set_frame_offset,
74 NULL, /* get_op_estimated_cost */
75 NULL, /* possible_memory_operand */
76 NULL, /* perform_memory_operand */
82 * Transforms the standard firm graph into
83 * a TEMLPATE firm graph
85 static void TEMPLATE_prepare_graph(ir_graph *irg)
87 /* transform nodes into assembler instructions */
88 TEMPLATE_transform_graph(irg);
94 * Called immediatly before emit phase.
96 static void TEMPLATE_finish_irg(ir_graph *irg)
98 /* fix stack entity offsets */
99 be_abi_fix_stack_nodes(irg);
100 be_abi_fix_stack_bias(irg);
104 static void TEMPLATE_before_ra(ir_graph *irg)
107 /* Some stuff you need to do after scheduling but before register allocation */
110 static void TEMPLATE_init_graph(ir_graph *irg)
117 extern const arch_isa_if_t TEMPLATE_isa_if;
118 static TEMPLATE_isa_t TEMPLATE_isa_template = {
120 &TEMPLATE_isa_if, /* isa interface implementation */
121 N_TEMPLATE_REGISTERS,
124 TEMPLATE_reg_classes,
125 &TEMPLATE_registers[REG_SP], /* stack pointer register */
126 &TEMPLATE_registers[REG_BP], /* base pointer register */
127 2, /* power of two stack alignment for calls, 2^2 == 4 */
128 7, /* costs for a spill instruction */
129 5, /* costs for a reload instruction */
130 true, /* custom abi handling */
134 static void TEMPLATE_init(void)
136 TEMPLATE_register_init();
137 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
140 static void TEMPLATE_finish(void)
142 TEMPLATE_free_opcodes();
145 static arch_env_t *TEMPLATE_begin_codegeneration(void)
147 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
148 *isa = TEMPLATE_isa_template;
154 * Closes the output file and frees the ISA structure.
156 static void TEMPLATE_end_codegeneration(void *self)
162 * Get the between type for that call.
163 * @param self The callback object.
164 * @return The between type of for that call.
166 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
168 static ir_type *between_type = NULL;
169 static ir_entity *old_bp_ent = NULL;
173 ir_entity *ret_addr_ent;
174 ir_type *ret_addr_type = new_type_primitive(mode_P);
175 ir_type *old_bp_type = new_type_primitive(mode_P);
177 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
178 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
179 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
181 set_entity_offset(old_bp_ent, 0);
182 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
183 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
189 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
190 TEMPLATE_get_between_type,
194 * Get the ABI restrictions for procedure calls.
195 * @param self The this pointer.
196 * @param method_type The type of the method (procedure) in question.
197 * @param abi The abi object to be modified
199 static void TEMPLATE_get_call_abi(ir_type *method_type, be_abi_call_t *abi)
203 int i, n = get_method_n_params(method_type);
205 /* set abi flags for calls */
206 be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
207 call_flags.call_has_imm = true;
208 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
210 for (i = 0; i < n; i++) {
211 /* TODO: implement register parameter: */
212 /* reg = get reg for param i; */
213 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
215 /* default: all parameters on stack */
216 tp = get_method_param_type(method_type, i);
217 mode = get_type_mode(tp);
218 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
221 /* TODO: set correct return register */
222 /* default: return value is in R0 resp. F0 */
223 if (get_method_n_ress(method_type) > 0) {
224 tp = get_method_res_type(method_type, 0);
225 mode = get_type_mode(tp);
227 be_abi_call_res_reg(abi, 0,
228 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
232 static void TEMPLATE_lower_for_target(void)
234 lower_builtins(0, NULL);
236 /* lower compound param handling */
237 lower_calls_with_compounds(LF_RETURN_HIDDEN);
240 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
250 * Returns the libFirm configuration parameter for this backend.
252 static const backend_params *TEMPLATE_get_backend_params(void)
254 static backend_params p = {
255 0, /* no inline assembly */
256 0, /* no support for Rotl nodes */
257 0, /* 0: little-endian, 1: big-endian */
258 1, /* modulo shift efficient */
259 0, /* non-modulo shift efficient */
260 NULL, /* architecture dependent settings, will be set later */
261 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
262 32, /* machine size - a 32bit CPU */
263 NULL, /* float arithmetic mode */
264 NULL, /* long long type */
265 NULL, /* unsigned long long type */
266 NULL, /* long double type */
267 0, /* no trampoline support: size 0 */
268 0, /* no trampoline support: align 0 */
269 NULL, /* no trampoline support: no trampoline builder */
270 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
275 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
278 return ASM_CONSTRAINT_FLAG_INVALID;
281 static int TEMPLATE_is_valid_clobber(const char *clobber)
288 * Check if the given register is callee or caller save.
290 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
293 /* check for callee saved */
294 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
295 switch (reg->index) {
309 /* check for caller saved */
310 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
311 switch (reg->index) {
323 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
324 /* all FP registers are caller save */
331 const arch_isa_if_t TEMPLATE_isa_if = {
334 TEMPLATE_get_backend_params,
335 TEMPLATE_lower_for_target,
336 TEMPLATE_parse_asm_constraint,
337 TEMPLATE_is_valid_clobber,
339 TEMPLATE_begin_codegeneration,
340 TEMPLATE_end_codegeneration,
342 TEMPLATE_get_call_abi,
343 NULL, /* mark remat */
344 NULL, /* get_pic_base */
347 TEMPLATE_register_saved_by,
349 NULL, /* handle intrinsics */
350 NULL, /* before_abi */
351 TEMPLATE_prepare_graph,
354 TEMPLATE_emit_routine,
357 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
358 void be_init_arch_TEMPLATE(void)
360 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
361 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
362 TEMPLATE_init_transform();