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_op_estimated_cost */
89 NULL, /* possible_memory_operand */
90 NULL, /* perform_memory_operand */
96 * Transforms the standard firm graph into
97 * a TEMLPATE firm graph
99 static void TEMPLATE_prepare_graph(ir_graph *irg)
101 /* transform nodes into assembler instructions */
102 TEMPLATE_transform_graph(irg);
108 * Called immediatly before emit phase.
110 static void TEMPLATE_finish_irg(ir_graph *irg)
112 /* fix stack entity offsets */
113 be_abi_fix_stack_nodes(irg);
114 be_abi_fix_stack_bias(irg);
118 static void TEMPLATE_before_ra(ir_graph *irg)
121 /* Some stuff you need to do after scheduling but before register allocation */
124 static void TEMPLATE_init_graph(ir_graph *irg)
131 extern const arch_isa_if_t TEMPLATE_isa_if;
132 static TEMPLATE_isa_t TEMPLATE_isa_template = {
134 &TEMPLATE_isa_if, /* isa interface implementation */
135 N_TEMPLATE_REGISTERS,
138 TEMPLATE_reg_classes,
139 &TEMPLATE_registers[REG_SP], /* stack pointer register */
140 &TEMPLATE_registers[REG_BP], /* base pointer register */
141 2, /* power of two stack alignment for calls, 2^2 == 4 */
142 NULL, /* main environment */
143 7, /* costs for a spill instruction */
144 5, /* costs for a reload instruction */
145 true, /* no custom abi handling */
149 static void TEMPLATE_init(void)
151 TEMPLATE_register_init();
152 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
155 static void TEMPLATE_finish(void)
157 TEMPLATE_free_opcodes();
160 static arch_env_t *TEMPLATE_begin_codegeneration(void)
162 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
163 *isa = TEMPLATE_isa_template;
169 * Closes the output file and frees the ISA structure.
171 static void TEMPLATE_end_codegeneration(void *self)
173 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t*)self;
175 /* emit now all global declarations */
176 be_gas_end_compilation_unit(isa->base.main_env);
183 * Get the between type for that call.
184 * @param self The callback object.
185 * @return The between type of for that call.
187 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
189 static ir_type *between_type = NULL;
190 static ir_entity *old_bp_ent = NULL;
194 ir_entity *ret_addr_ent;
195 ir_type *ret_addr_type = new_type_primitive(mode_P);
196 ir_type *old_bp_type = new_type_primitive(mode_P);
198 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
199 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
200 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
202 set_entity_offset(old_bp_ent, 0);
203 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
204 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
210 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
211 TEMPLATE_get_between_type,
215 * Get the ABI restrictions for procedure calls.
216 * @param self The this pointer.
217 * @param method_type The type of the method (procedure) in question.
218 * @param abi The abi object to be modified
220 static void TEMPLATE_get_call_abi(ir_type *method_type, be_abi_call_t *abi)
224 int i, n = get_method_n_params(method_type);
226 /* set abi flags for calls */
227 be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
228 call_flags.call_has_imm = true;
229 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
231 for (i = 0; i < n; i++) {
232 /* TODO: implement register parameter: */
233 /* reg = get reg for param i; */
234 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
236 /* default: all parameters on stack */
237 tp = get_method_param_type(method_type, i);
238 mode = get_type_mode(tp);
239 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
242 /* TODO: set correct return register */
243 /* default: return value is in R0 resp. F0 */
244 if (get_method_n_ress(method_type) > 0) {
245 tp = get_method_res_type(method_type, 0);
246 mode = get_type_mode(tp);
248 be_abi_call_res_reg(abi, 0,
249 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
253 static void TEMPLATE_lower_for_target(void)
255 lower_builtins(0, NULL);
257 /* lower compound param handling */
258 lower_calls_with_compounds(LF_RETURN_HIDDEN);
261 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
271 * Returns the libFirm configuration parameter for this backend.
273 static const backend_params *TEMPLATE_get_backend_params(void)
275 static backend_params p = {
276 0, /* no inline assembly */
277 0, /* no support for Rotl nodes */
278 0, /* 0: little-endian, 1: big-endian */
279 1, /* modulo shift efficient */
280 0, /* non-modulo shift efficient */
281 NULL, /* architecture dependent settings, will be set later */
282 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
283 32, /* machine size - a 32bit CPU */
284 NULL, /* float arithmetic mode */
285 NULL, /* long long type */
286 NULL, /* unsigned long long type */
287 NULL, /* long double type */
288 0, /* no trampoline support: size 0 */
289 0, /* no trampoline support: align 0 */
290 NULL, /* no trampoline support: no trampoline builder */
291 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
296 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
299 return ASM_CONSTRAINT_FLAG_INVALID;
302 static int TEMPLATE_is_valid_clobber(const char *clobber)
309 * Check if the given register is callee or caller save.
311 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
314 /* check for callee saved */
315 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
316 switch (reg->index) {
330 /* check for caller saved */
331 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
332 switch (reg->index) {
344 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
345 /* all FP registers are caller save */
352 const arch_isa_if_t TEMPLATE_isa_if = {
355 TEMPLATE_get_backend_params,
356 TEMPLATE_lower_for_target,
357 TEMPLATE_parse_asm_constraint,
358 TEMPLATE_is_valid_clobber,
360 TEMPLATE_begin_codegeneration,
361 TEMPLATE_end_codegeneration,
363 TEMPLATE_get_call_abi,
364 NULL, /* mark remat */
365 NULL, /* get_pic_base */
368 TEMPLATE_register_saved_by,
370 NULL, /* handle intrinsics */
371 NULL, /* before_abi */
372 TEMPLATE_prepare_graph,
375 TEMPLATE_emit_routine,
378 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
379 void be_init_arch_TEMPLATE(void)
381 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
382 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
383 TEMPLATE_init_transform();