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.
32 #include "lower_calls.h"
38 #include "../bearch.h"
39 #include "../benode.h"
40 #include "../belower.h"
41 #include "../besched.h"
43 #include "../bemodule.h"
44 #include "../begnuas.h"
45 #include "../belistsched.h"
46 #include "../bestack.h"
48 #include "bearch_TEMPLATE_t.h"
50 #include "TEMPLATE_new_nodes.h"
51 #include "gen_TEMPLATE_regalloc_if.h"
52 #include "TEMPLATE_transform.h"
53 #include "TEMPLATE_emitter.h"
55 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
57 static arch_irn_class_t TEMPLATE_classify(const ir_node *irn)
60 return arch_irn_class_none;
63 static ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
66 /* TODO: return the ir_entity assigned to the frame */
71 * This function is called by the generic backend to correct offsets for
72 * nodes accessing the stack.
74 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
78 /* TODO: correct offset if irn accesses the stack */
81 static int TEMPLATE_get_sp_bias(const ir_node *irn)
87 /* fill register allocator interface */
89 static const arch_irn_ops_t TEMPLATE_irn_ops = {
91 TEMPLATE_get_frame_entity,
92 TEMPLATE_set_frame_offset,
94 NULL, /* get_inverse */
95 NULL, /* get_op_estimated_cost */
96 NULL, /* possible_memory_operand */
97 NULL, /* perform_memory_operand */
103 * Transforms the standard firm graph into
104 * a TEMLPATE firm graph
106 static void TEMPLATE_prepare_graph(ir_graph *irg)
108 /* transform nodes into assembler instructions */
109 TEMPLATE_transform_graph(irg);
115 * Called immediatly before emit phase.
117 static void TEMPLATE_finish_irg(ir_graph *irg)
119 /* fix stack entity offsets */
120 be_abi_fix_stack_nodes(irg);
121 be_abi_fix_stack_bias(irg);
125 static void TEMPLATE_before_ra(ir_graph *irg)
128 /* Some stuff you need to do after scheduling but before register allocation */
131 static void TEMPLATE_init_graph(ir_graph *irg)
138 extern const arch_isa_if_t TEMPLATE_isa_if;
139 static TEMPLATE_isa_t TEMPLATE_isa_template = {
141 &TEMPLATE_isa_if, /* isa interface implementation */
142 N_TEMPLATE_REGISTERS,
145 TEMPLATE_reg_classes,
146 &TEMPLATE_registers[REG_SP], /* stack pointer register */
147 &TEMPLATE_registers[REG_BP], /* base pointer register */
148 &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp], /* link pointer register class */
149 2, /* power of two stack alignment for calls, 2^2 == 4 */
150 NULL, /* main environment */
151 7, /* costs for a spill instruction */
152 5, /* costs for a reload instruction */
153 false, /* no custom abi handling */
158 * Initializes the backend ISA
160 static arch_env_t *TEMPLATE_init(FILE *outfile)
162 TEMPLATE_isa_t *isa = XMALLOC(TEMPLATE_isa_t);
163 *isa = TEMPLATE_isa_template;
165 be_emit_init(outfile);
167 TEMPLATE_register_init();
168 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
174 * Closes the output file and frees the ISA structure.
176 static void TEMPLATE_done(void *self)
178 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t*)self;
180 /* emit now all global declarations */
181 be_gas_emit_decls(isa->base.main_env);
188 * Get the register class which shall be used to store a value of a given mode.
189 * @param self The this pointer.
190 * @param mode The mode in question.
191 * @return A register class which can hold values of the given mode.
193 static const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const ir_mode *mode)
195 if (mode_is_float(mode))
196 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp];
198 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp];
202 * Get the between type for that call.
203 * @param self The callback object.
204 * @return The between type of for that call.
206 static ir_type *TEMPLATE_get_between_type(ir_graph *irg)
208 static ir_type *between_type = NULL;
209 static ir_entity *old_bp_ent = NULL;
213 ir_entity *ret_addr_ent;
214 ir_type *ret_addr_type = new_type_primitive(mode_P);
215 ir_type *old_bp_type = new_type_primitive(mode_P);
217 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
218 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
219 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
221 set_entity_offset(old_bp_ent, 0);
222 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
223 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
229 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
230 TEMPLATE_get_between_type,
234 * Get the ABI restrictions for procedure calls.
235 * @param self The this pointer.
236 * @param method_type The type of the method (procedure) in question.
237 * @param abi The abi object to be modified
239 static void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
244 int i, n = get_method_n_params(method_type);
245 be_abi_call_flags_t call_flags;
248 /* set abi flags for calls */
249 call_flags.bits.store_args_sequential = 1;
250 call_flags.bits.try_omit_fp = 1;
251 call_flags.bits.fp_free = 0;
252 call_flags.bits.call_has_imm = 1;
254 /* set stack parameter passing style */
255 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
257 for (i = 0; i < n; i++) {
258 /* TODO: implement register parameter: */
259 /* reg = get reg for param i; */
260 /* be_abi_call_param_reg(abi, i, reg, ABI_CONTEXT_BOTH); */
262 /* default: all parameters on stack */
263 tp = get_method_param_type(method_type, i);
264 mode = get_type_mode(tp);
265 be_abi_call_param_stack(abi, i, mode, 4, 0, 0, ABI_CONTEXT_BOTH);
268 /* TODO: set correct return register */
269 /* default: return value is in R0 resp. F0 */
270 if (get_method_n_ress(method_type) > 0) {
271 tp = get_method_res_type(method_type, 0);
272 mode = get_type_mode(tp);
274 be_abi_call_res_reg(abi, 0,
275 mode_is_float(mode) ? &TEMPLATE_registers[REG_F0] : &TEMPLATE_registers[REG_R0], ABI_CONTEXT_BOTH);
280 * Returns the necessary byte alignment for storing a register of given class.
282 static int TEMPLATE_get_reg_class_alignment(const arch_register_class_t *cls)
284 ir_mode *mode = arch_register_class_mode(cls);
285 return get_mode_size_bytes(mode);
288 static void TEMPLATE_lower_for_target(void)
290 /* lower compound param handling */
291 lower_calls_with_compounds(LF_RETURN_HIDDEN);
294 static int TEMPLATE_is_mux_allowed(ir_node *sel, ir_node *mux_false,
304 * Returns the libFirm configuration parameter for this backend.
306 static const backend_params *TEMPLATE_get_backend_params(void)
308 static backend_params p = {
309 0, /* no inline assembly */
310 0, /* no support for Rotl nodes */
311 0, /* 0: little-endian, 1: big-endian */
312 1, /* modulo shift efficient */
313 0, /* non-modulo shift efficient */
314 NULL, /* architecture dependent settings, will be set later */
315 TEMPLATE_is_mux_allowed, /* parameter for if conversion */
316 32, /* machine size - a 32bit CPU */
317 NULL, /* float arithmetic mode */
318 NULL, /* long long type */
319 NULL, /* unsigned long long type */
320 NULL, /* long double type */
321 0, /* no trampoline support: size 0 */
322 0, /* no trampoline support: align 0 */
323 NULL, /* no trampoline support: no trampoline builder */
324 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
329 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
337 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const char **c)
340 return ASM_CONSTRAINT_FLAG_INVALID;
343 static int TEMPLATE_is_valid_clobber(const char *clobber)
350 * Check if the given register is callee or caller save.
352 static int TEMPLATE_register_saved_by(const arch_register_t *reg, int callee)
355 /* check for callee saved */
356 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
357 switch (reg->index) {
371 /* check for caller saved */
372 if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_gp]) {
373 switch (reg->index) {
385 } else if (reg->reg_class == &TEMPLATE_reg_classes[CLASS_TEMPLATE_fp]) {
386 /* all FP registers are caller save */
393 const arch_isa_if_t TEMPLATE_isa_if = {
395 TEMPLATE_lower_for_target,
397 NULL, /* handle intrinsics */
398 TEMPLATE_get_reg_class_for_mode,
399 TEMPLATE_get_call_abi,
400 TEMPLATE_get_reg_class_alignment,
401 TEMPLATE_get_backend_params,
402 TEMPLATE_get_backend_irg_list,
403 NULL, /* mark remat */
404 TEMPLATE_parse_asm_constraint,
405 TEMPLATE_is_valid_clobber,
408 NULL, /* get_pic_base */
409 NULL, /* before_abi */
410 TEMPLATE_prepare_graph,
413 TEMPLATE_emit_routine,
414 TEMPLATE_register_saved_by,
417 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE)
418 void be_init_arch_TEMPLATE(void)
420 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
421 FIRM_DBG_REGISTER(dbg, "firm.be.TEMPLATE.cg");
422 TEMPLATE_init_transform();