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 emit assembler for a backend graph
23 * @version $Id: amd64_emitter.c 26746 2009-11-27 08:53:15Z matze $
39 #include "../besched.h"
40 #include "../begnuas.h"
41 #include "../beblocksched.h"
42 #include "../be_dbgout.h"
44 #include "amd64_emitter.h"
45 #include "gen_amd64_emitter.h"
46 #include "amd64_nodes_attr.h"
47 #include "amd64_new_nodes.h"
49 #define SNPRINTF_BUF_LEN 128
51 #include "../benode.h"
54 * Returns the register at in position pos.
56 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
59 const arch_register_t *reg = NULL;
61 assert(get_irn_arity(node) > pos && "Invalid IN position");
63 /* The out register of the operator at position pos is the
64 in register we need. */
65 op = get_irn_n(node, pos);
67 reg = arch_get_irn_register(op);
69 assert(reg && "no in register found");
74 * Returns the register at out position pos.
76 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
79 const arch_register_t *reg = NULL;
81 /* 1st case: irn is not of mode_T, so it has only */
82 /* one OUT register -> good */
83 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
84 /* Proj with the corresponding projnum for the register */
86 if (get_irn_mode(node) != mode_T) {
87 reg = arch_get_irn_register(node);
88 } else if (is_amd64_irn(node)) {
89 reg = arch_irn_get_register(node, pos);
91 const ir_edge_t *edge;
93 foreach_out_edge(node, edge) {
94 proj = get_edge_src_irn(edge);
95 assert(is_Proj(proj) && "non-Proj from mode_T node");
96 if (get_Proj_proj(proj) == pos) {
97 reg = arch_get_irn_register(proj);
103 assert(reg && "no out register found");
107 /*************************************************************
109 * (_) | | / _| | | | |
110 * _ __ _ __ _ _ __ | |_| |_ | |__ ___| |_ __ ___ _ __
111 * | '_ \| '__| | '_ \| __| _| | '_ \ / _ \ | '_ \ / _ \ '__|
112 * | |_) | | | | | | | |_| | | | | | __/ | |_) | __/ |
113 * | .__/|_| |_|_| |_|\__|_| |_| |_|\___|_| .__/ \___|_|
116 *************************************************************/
118 void amd64_emit_register(const arch_register_t *reg)
121 be_emit_string(arch_register_get_name(reg));
124 void amd64_emit_immediate(const ir_node *node)
126 const amd64_attr_t *attr = get_amd64_attr_const (node);
128 be_emit_irprintf("0x%X", attr->ext.imm_value);
131 void amd64_emit_source_register(const ir_node *node, int pos)
133 amd64_emit_register(get_in_reg(node, pos));
136 void amd64_emit_dest_register(const ir_node *node, int pos)
138 amd64_emit_register(get_out_reg(node, pos));
142 * Returns the target label for a control flow node.
145 static void amd64_emit_cfop_target(const ir_node *node)
147 ir_node *block = get_irn_link(node);
149 be_emit_irprintf("BLOCK_%ld", get_irn_node_nr(block));
153 /***********************************************************************************
156 * _ __ ___ __ _ _ _ __ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __
157 * | '_ ` _ \ / _` | | '_ \ | _| '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
158 * | | | | | | (_| | | | | | | | | | | (_| | | | | | | __/\ V V / (_) | | | <
159 * |_| |_| |_|\__,_|_|_| |_| |_| |_| \__,_|_| |_| |_|\___| \_/\_/ \___/|_| |_|\_\
161 ***********************************************************************************/
164 * Default emitter for anything that we don't want to generate code for.
166 static void emit_nothing(const ir_node *node)
174 static void emit_amd64_SymConst(const ir_node *irn)
176 const amd64_SymConst_attr_t *attr = get_amd64_SymConst_attr_const(irn);
177 // sym_or_tv_t key, *entry;
180 // key.u.id = get_entity_ld_ident(attr->entity);
183 // entry = (sym_or_tv_t *)set_insert(sym_or_tv, &key, sizeof(key), HASH_PTR(key.u.generic));
184 // if (entry->label == 0) {
185 // /* allocate a label */
186 // entry->label = get_unique_label();
188 // label = entry->label;
190 be_emit_cstring("\tmov $");
191 be_gas_emit_entity(attr->entity);
192 be_emit_cstring(", ");
193 amd64_emit_dest_register(irn, 0);
194 be_emit_finish_line_gas(irn);
200 static void emit_amd64_Conv(const ir_node *irn)
202 const amd64_attr_t *attr = get_irn_generic_attr_const(irn);
205 be_emit_cstring("\tmov ");
206 amd64_emit_source_register(irn, 0);
207 be_emit_cstring(", ");
208 amd64_emit_dest_register(irn, 0);
209 be_emit_finish_line_gas(irn);
214 * Returns the next block in a block schedule.
216 static ir_node *sched_next_block(const ir_node *block)
218 return get_irn_link(block);
222 * Returns the target block for a control flow node.
224 static ir_node *get_cfop_target_block(const ir_node *irn)
226 return get_irn_link(irn);
230 * Emit the target label for a control flow node.
232 static void amd64_emit_cfop_target(const ir_node *irn)
234 ir_node *block = get_cfop_target_block(irn);
236 be_gas_emit_block_name(block);
242 static void emit_amd64_Jmp(const ir_node *node)
244 ir_node *block, *next_block;
246 /* for now, the code works for scheduled and non-schedules blocks */
247 block = get_nodes_block(node);
249 /* we have a block schedule */
250 next_block = sched_next_block(block);
251 if (get_cfop_target_block(node) != next_block) {
252 be_emit_cstring("\tjmp ");
253 amd64_emit_cfop_target(node);
255 be_emit_cstring("\t/* fallthrough to ");
256 amd64_emit_cfop_target(node);
257 be_emit_cstring(" */");
259 be_emit_finish_line_gas(node);
263 * Emit a Compare with conditional branch.
265 static void emit_amd64_Jcc(const ir_node *irn)
267 const ir_edge_t *edge;
268 const ir_node *proj_true = NULL;
269 const ir_node *proj_false = NULL;
270 const ir_node *block;
271 const ir_node *next_block;
273 const amd64_attr_t *attr = get_irn_generic_attr_const(irn);
274 int proj_num = attr->ext.pnc;
275 ir_node *op1 = get_irn_n(irn, 0);
276 const amd64_attr_t *cmp_attr = get_irn_generic_attr_const(op1);
277 bool is_signed = !cmp_attr->data.cmp_unsigned;
279 assert(is_amd64_Cmp(op1));
281 foreach_out_edge(irn, edge) {
282 ir_node *proj = get_edge_src_irn(edge);
283 long nr = get_Proj_proj(proj);
284 if (nr == pn_Cond_true) {
291 if (cmp_attr->data.ins_permuted) {
292 proj_num = get_mirrored_pnc(proj_num);
295 /* for now, the code works for scheduled and non-schedules blocks */
296 block = get_nodes_block(irn);
298 /* we have a block schedule */
299 next_block = sched_next_block(block);
301 assert(proj_num != pn_Cmp_False);
302 assert(proj_num != pn_Cmp_True);
304 if (get_cfop_target_block(proj_true) == next_block) {
305 /* exchange both proj's so the second one can be omitted */
306 const ir_node *t = proj_true;
308 proj_true = proj_false;
310 proj_num = get_negated_pnc(proj_num, mode_Lu);
314 case pn_Cmp_Eq: suffix = "e"; break;
315 case pn_Cmp_Lt: suffix = is_signed ? "l" : "b"; break;
316 case pn_Cmp_Le: suffix = is_signed ? "le" : "be"; break;
317 case pn_Cmp_Gt: suffix = is_signed ? "g" : "o"; break;
318 case pn_Cmp_Ge: suffix = is_signed ? "ge" : "oe"; break;
319 case pn_Cmp_Lg: suffix = "ne"; break;
320 case pn_Cmp_Leg: suffix = "mp"; break;
321 default: panic("Cmp has unsupported pnc");
324 /* emit the true proj */
325 be_emit_irprintf("\tj%s ", suffix);
326 amd64_emit_cfop_target(proj_true);
327 be_emit_finish_line_gas(proj_true);
329 if (get_cfop_target_block(proj_false) == next_block) {
330 be_emit_cstring("\t/* fallthrough to ");
331 amd64_emit_cfop_target(proj_false);
332 be_emit_cstring(" */");
333 be_emit_finish_line_gas(proj_false);
335 be_emit_cstring("\tjmp ");
336 amd64_emit_cfop_target(proj_false);
337 be_emit_finish_line_gas(proj_false);
342 * Emits code for a call.
344 static void emit_be_Call(const ir_node *node)
346 ir_entity *entity = be_Call_get_entity(node);
348 /* %eax/%rax is used in AMD64 to pass the number of vector parameters for
349 * variable argument counts */
350 if (get_method_variadicity (be_Call_get_type((ir_node *) node))) {
351 /* But this still is a hack... */
352 be_emit_cstring("\txor %rax, %rax");
353 be_emit_finish_line_gas(node);
357 be_emit_cstring("\tcall ");
358 be_gas_emit_entity (be_Call_get_entity(node));
359 be_emit_finish_line_gas(node);
361 be_emit_pad_comment();
362 be_emit_cstring("/* FIXME: call NULL entity?! */\n");
369 static void emit_be_Copy(const ir_node *irn)
371 ir_mode *mode = get_irn_mode(irn);
373 if (get_in_reg(irn, 0) == get_out_reg(irn, 0)) {
378 if (mode_is_float(mode)) {
379 panic("emit_be_Copy: move not supported for FP");
380 } else if (mode_is_data(mode)) {
381 be_emit_cstring("\tmov ");
382 amd64_emit_source_register(irn, 0);
383 be_emit_cstring(", ");
384 amd64_emit_dest_register(irn, 0);
385 be_emit_finish_line_gas(irn);
387 panic("emit_be_Copy: move not supported for this mode");
391 static void emit_amd64_FrameAddr(const ir_node *irn)
393 const amd64_SymConst_attr_t *attr = get_irn_generic_attr_const(irn);
395 be_emit_cstring("\tmov ");
396 amd64_emit_source_register(irn, 0);
397 be_emit_cstring(", ");
398 amd64_emit_dest_register(irn, 0);
399 be_emit_finish_line_gas(irn);
401 be_emit_cstring("\tadd ");
402 be_emit_irprintf("$0x%X", attr->fp_offset);
403 be_emit_cstring(", ");
404 amd64_emit_dest_register(irn, 0);
405 be_emit_finish_line_gas(irn);
409 * Emits code to increase stack pointer.
411 static void emit_be_IncSP(const ir_node *node)
413 int offs = be_get_IncSP_offset(node);
419 be_emit_irprintf("\tsub ");
420 be_emit_irprintf("$%u, ", offs);
421 amd64_emit_dest_register(node, 0);
422 be_emit_finish_line_gas(node);
424 be_emit_irprintf("\tadd ");
425 be_emit_irprintf("$%u, ", -offs);
426 amd64_emit_dest_register(node, 0);
427 be_emit_finish_line_gas(node);
432 * Emits code for a return.
434 static void emit_be_Return(const ir_node *node)
436 be_emit_cstring("\tret");
437 be_emit_finish_line_gas(node);
441 static void emit_amd64_binop_op(const ir_node *irn, int second_op)
443 if (irn->op == op_amd64_Add) {
444 be_emit_cstring("\tadd ");
445 } else if (irn->op == op_amd64_Sub) {
446 be_emit_cstring("\tsub ");
449 amd64_emit_source_register(irn, second_op);
450 be_emit_cstring(", ");
451 amd64_emit_dest_register(irn, 0);
452 be_emit_finish_line_gas(irn);
456 * Emits an arithmetic operation that handles arbitraty input registers.
458 static void emit_amd64_binop(const ir_node *irn)
460 const arch_register_t *reg_s1 = get_in_reg(irn, 0);
461 const arch_register_t *reg_s2 = get_in_reg(irn, 1);
462 const arch_register_t *reg_d1 = get_out_reg(irn, 0);
466 if (reg_d1 != reg_s1 && reg_d1 != reg_s2) {
467 be_emit_cstring("\tmov ");
468 amd64_emit_register(reg_s1);
469 be_emit_cstring(", ");
470 amd64_emit_register(reg_d1);
471 be_emit_finish_line_gas(irn);
474 } else if (reg_d1 == reg_s2 && reg_d1 != reg_s1) {
479 emit_amd64_binop_op(irn, second_op);
483 * The type of a emitter function.
485 typedef void (emit_func)(const ir_node *irn);
488 * Set a node emitter. Make it a bit more type safe.
490 static inline void set_emitter(ir_op *op, emit_func arm_emit_node)
492 op->ops.generic = (op_func)arm_emit_node;
496 * Enters the emitter functions for handled nodes into the generic
497 * pointer of an opcode.
499 static void amd64_register_emitters(void)
501 /* first clear the generic function pointer for all ops */
502 clear_irp_opcodes_generic_func();
504 /* register all emitter functions defined in spec */
505 amd64_register_spec_emitters();
507 set_emitter(op_amd64_SymConst, emit_amd64_SymConst);
508 set_emitter(op_amd64_Jmp, emit_amd64_Jmp);
509 set_emitter(op_amd64_Jcc, emit_amd64_Jcc);
510 set_emitter(op_amd64_Conv, emit_amd64_Conv);
511 set_emitter(op_amd64_FrameAddr, emit_amd64_FrameAddr);
512 set_emitter(op_be_Return, emit_be_Return);
513 set_emitter(op_be_Call, emit_be_Call);
514 set_emitter(op_be_Copy, emit_be_Copy);
515 set_emitter(op_be_IncSP, emit_be_IncSP);
517 set_emitter(op_amd64_Add, emit_amd64_binop);
519 set_emitter(op_be_Start, emit_nothing);
520 set_emitter(op_be_Keep, emit_nothing);
521 set_emitter(op_be_Barrier, emit_nothing);
522 set_emitter(op_Phi, emit_nothing);
525 typedef void (*emit_func_ptr) (const ir_node *);
528 * Emits code for a node.
530 static void amd64_emit_node(const ir_node *node)
532 ir_op *op = get_irn_op(node);
534 if (op->ops.generic) {
535 emit_func_ptr func = (emit_func_ptr) op->ops.generic;
538 ir_fprintf(stderr, "No emitter for node %+F\n", node);
543 * Walks over the nodes in a block connected by scheduling edges
544 * and emits code for each node.
546 static void amd64_gen_block(ir_node *block, void *data)
551 if (! is_Block(block))
554 be_gas_emit_block_name(block);
557 be_emit_write_line();
559 sched_foreach(block, node) {
560 amd64_emit_node(node);
566 * Sets labels for control flow nodes (jump target)
567 * TODO: Jump optimization
569 static void amd64_gen_labels(ir_node *block, void *env)
572 int n = get_Block_n_cfgpreds(block);
575 for (n--; n >= 0; n--) {
576 pred = get_Block_cfgpred(block, n);
577 set_irn_link(pred, block);
584 void amd64_gen_routine(const amd64_code_gen_t *cg, ir_graph *irg)
586 ir_entity *entity = get_irg_entity(irg);
591 /* register all emitter functions */
592 amd64_register_emitters();
594 blk_sched = be_create_block_schedule(irg);
596 be_dbg_method_begin(entity, be_abi_get_stack_layout(cg->birg->abi));
597 be_gas_emit_function_prolog(entity, 4);
599 irg_block_walk_graph(irg, amd64_gen_labels, NULL, NULL);
601 n = ARR_LEN(blk_sched);
602 for (i = 0; i < n; i++) {
603 ir_node *block = blk_sched[i];
604 ir_node *next = (i + 1) < n ? blk_sched[i+1] : NULL;
606 set_irn_link(block, next);
609 for (i = 0; i < n; ++i) {
610 ir_node *block = blk_sched[i];
612 amd64_gen_block(block, 0);
615 be_gas_emit_function_epilog(entity);
618 be_emit_write_line();