2 * Copyright (C) 1995-2010 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
40 #include "raw_bitset.h"
43 #include "../besched.h"
44 #include "../beblocksched.h"
46 #include "../begnuas.h"
47 #include "../be_dbgout.h"
48 #include "../benode.h"
50 #include "sparc_emitter.h"
51 #include "gen_sparc_emitter.h"
52 #include "sparc_nodes_attr.h"
53 #include "sparc_new_nodes.h"
54 #include "gen_sparc_regalloc_if.h"
56 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
59 * Returns the register at in position pos.
61 static const arch_register_t *get_in_reg(const ir_node *node, int pos)
64 const arch_register_t *reg = NULL;
66 assert(get_irn_arity(node) > pos && "Invalid IN position");
68 /* The out register of the operator at position pos is the
69 in register we need. */
70 op = get_irn_n(node, pos);
72 reg = arch_get_irn_register(op);
74 assert(reg && "no in register found");
79 * Returns the register at out position pos.
81 static const arch_register_t *get_out_reg(const ir_node *node, int pos)
84 const arch_register_t *reg = NULL;
86 /* 1st case: irn is not of mode_T, so it has only */
87 /* one OUT register -> good */
88 /* 2nd case: irn is of mode_T -> collect all Projs and ask the */
89 /* Proj with the corresponding projnum for the register */
91 if (get_irn_mode(node) != mode_T) {
92 reg = arch_get_irn_register(node);
93 } else if (is_sparc_irn(node)) {
94 reg = arch_irn_get_register(node, pos);
96 const ir_edge_t *edge;
98 foreach_out_edge(node, edge) {
99 proj = get_edge_src_irn(edge);
100 assert(is_Proj(proj) && "non-Proj from mode_T node");
101 if (get_Proj_proj(proj) == pos) {
102 reg = arch_get_irn_register(proj);
108 assert(reg && "no out register found");
112 void sparc_emit_immediate(const ir_node *node)
114 int const val = get_sparc_attr_const(node)->immediate_value;
115 assert(-4096 <= val && val < 4096);
116 be_emit_irprintf("%d", val);
119 void sparc_emit_source_register(const ir_node *node, int pos)
121 const arch_register_t *reg = get_in_reg(node, pos);
123 be_emit_string(arch_register_get_name(reg));
126 void sparc_emit_dest_register(const ir_node *node, int pos)
128 const arch_register_t *reg = get_out_reg(node, pos);
130 be_emit_string(arch_register_get_name(reg));
134 * Emits either a imm or register depending on arity of node
136 * @param register no (-1 if no register)
138 void sparc_emit_reg_or_imm(const ir_node *node, int pos)
140 if (get_irn_arity(node) > pos) {
142 sparc_emit_source_register(node, pos);
144 // we have a imm input
145 sparc_emit_immediate(node);
149 static bool is_stack_pointer_relative(const ir_node *node)
151 const arch_register_t *sp = &sparc_gp_regs[REG_SP];
152 return (is_sparc_St(node) && get_in_reg(node, n_sparc_St_ptr) == sp)
153 || (is_sparc_Ld(node) && get_in_reg(node, n_sparc_Ld_ptr) == sp);
159 void sparc_emit_offset(const ir_node *node)
161 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
162 long offset = attr->offset;
164 /* bad hack: the real stack stuff is behind the always-there spill
165 * space for the register window and stack */
166 if (is_stack_pointer_relative(node))
167 offset += SPARC_MIN_STACKSIZE;
169 be_emit_irprintf("%+ld", offset);
175 * Emit load mode char
177 void sparc_emit_load_mode(const ir_node *node)
179 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
180 ir_mode *mode = attr->load_store_mode;
181 int bits = get_mode_size_bits(mode);
182 bool is_signed = mode_is_signed(mode);
185 be_emit_string(is_signed ? "sh" : "uh");
186 } else if (bits == 8) {
187 be_emit_string(is_signed ? "sb" : "ub");
188 } else if (bits == 64) {
196 * Emit store mode char
198 void sparc_emit_store_mode(const ir_node *node)
200 const sparc_load_store_attr_t *attr = get_sparc_load_store_attr_const(node);
201 ir_mode *mode = attr->load_store_mode;
202 int bits = get_mode_size_bits(mode);
206 } else if (bits == 8) {
208 } else if (bits == 64) {
216 * emit integer signed/unsigned prefix char
218 void sparc_emit_mode_sign_prefix(const ir_node *node)
220 ir_mode *mode = get_irn_mode(node);
221 bool is_signed = mode_is_signed(mode);
222 be_emit_string(is_signed ? "s" : "u");
225 static void emit_fp_suffix(const ir_mode *mode)
227 unsigned bits = get_mode_size_bits(mode);
228 assert(mode_is_float(mode));
232 } else if (bits == 64) {
234 } else if (bits == 128) {
237 panic("invalid FP mode");
241 void sparc_emit_fp_conv_source(const ir_node *node)
243 const sparc_fp_conv_attr_t *attr = get_sparc_fp_conv_attr_const(node);
244 emit_fp_suffix(attr->src_mode);
247 void sparc_emit_fp_conv_destination(const ir_node *node)
249 const sparc_fp_conv_attr_t *attr = get_sparc_fp_conv_attr_const(node);
250 emit_fp_suffix(attr->dest_mode);
254 * emits the FP mode suffix char
256 void sparc_emit_fp_mode_suffix(const ir_node *node)
258 const sparc_fp_attr_t *attr = get_sparc_fp_attr_const(node);
259 emit_fp_suffix(attr->fp_mode);
263 * Returns the target label for a control flow node.
265 static void sparc_emit_cfop_target(const ir_node *node)
267 ir_node *block = get_irn_link(node);
268 be_gas_emit_block_name(block);
274 static void sparc_emit_entity(ir_entity *entity)
276 be_gas_emit_entity(entity);
280 * Emits code for stack space management
282 static void emit_be_IncSP(const ir_node *irn)
284 int offs = -be_get_IncSP_offset(irn);
289 /* SPARC stack grows downwards */
291 be_emit_cstring("\tsub ");
294 be_emit_cstring("\tadd ");
297 sparc_emit_source_register(irn, 0);
298 be_emit_irprintf(", %d", offs);
299 be_emit_cstring(", ");
300 sparc_emit_dest_register(irn, 0);
301 be_emit_finish_line_gas(irn);
305 * emits code for save instruction with min. required stack space
307 static void emit_sparc_Save(const ir_node *irn)
309 const sparc_save_attr_t *save_attr = get_sparc_save_attr_const(irn);
310 be_emit_cstring("\tsave ");
311 sparc_emit_source_register(irn, 0);
312 be_emit_irprintf(", %d, ", -save_attr->initial_stacksize);
313 sparc_emit_dest_register(irn, 0);
314 be_emit_finish_line_gas(irn);
318 * emits code to load hi 22 bit of a constant
320 static void emit_sparc_HiImm(const ir_node *irn)
322 const sparc_attr_t *attr = get_sparc_attr_const(irn);
323 be_emit_cstring("\tsethi ");
324 be_emit_irprintf("%%hi(%d), ", attr->immediate_value);
325 sparc_emit_dest_register(irn, 0);
326 be_emit_finish_line_gas(irn);
330 * emits code to load lo 10bits of a constant
332 static void emit_sparc_LoImm(const ir_node *irn)
334 const sparc_attr_t *attr = get_sparc_attr_const(irn);
335 be_emit_cstring("\tor ");
336 sparc_emit_source_register(irn, 0);
337 be_emit_irprintf(", %%lo(%d), ", attr->immediate_value);
338 sparc_emit_dest_register(irn, 0);
339 be_emit_finish_line_gas(irn);
343 * emits code for mulh
345 static void emit_sparc_Mulh(const ir_node *irn)
347 be_emit_cstring("\t");
348 sparc_emit_mode_sign_prefix(irn);
349 be_emit_cstring("mul ");
351 sparc_emit_source_register(irn, 0);
352 be_emit_cstring(", ");
353 sparc_emit_reg_or_imm(irn, 1);
354 be_emit_cstring(", ");
355 sparc_emit_dest_register(irn, 0);
356 be_emit_finish_line_gas(irn);
358 // our result is in the y register now
359 // we just copy it to the assigned target reg
360 be_emit_cstring("\tmov ");
362 be_emit_string(arch_register_get_name(&sparc_flags_regs[REG_Y]));
363 be_emit_cstring(", ");
364 sparc_emit_dest_register(irn, 0);
365 be_emit_finish_line_gas(irn);
369 * Emits code for return node
371 static void emit_be_Return(const ir_node *irn)
373 be_emit_cstring("\tret");
374 //be_emit_cstring("\tjmp %i7+8");
375 be_emit_finish_line_gas(irn);
376 be_emit_cstring("\trestore");
377 be_emit_finish_line_gas(irn);
381 * Emits code for Call node
383 static void emit_sparc_Call(const ir_node *node)
385 const sparc_attr_t *attr = get_sparc_attr_const(node);
386 ir_entity *entity = attr->immediate_value_entity;
388 be_emit_cstring("\tcall ");
389 if (entity != NULL) {
390 sparc_emit_entity(entity);
391 be_emit_cstring(", 0");
393 int last = get_irn_arity(node);
394 sparc_emit_source_register(node, last-1);
396 be_emit_finish_line_gas(node);
398 /* fill delay slot */
399 be_emit_cstring("\tnop");
400 be_emit_finish_line_gas(node);
404 * Emit code for Perm node
406 static void emit_be_Perm(const ir_node *irn)
408 be_emit_cstring("\txor ");
409 sparc_emit_source_register(irn, 1);
410 be_emit_cstring(", ");
411 sparc_emit_source_register(irn, 0);
412 be_emit_cstring(", ");
413 sparc_emit_source_register(irn, 0);
414 be_emit_finish_line_gas(NULL);
416 be_emit_cstring("\txor ");
417 sparc_emit_source_register(irn, 1);
418 be_emit_cstring(", ");
419 sparc_emit_source_register(irn, 0);
420 be_emit_cstring(", ");
421 sparc_emit_source_register(irn, 1);
422 be_emit_finish_line_gas(NULL);
424 be_emit_cstring("\txor ");
425 sparc_emit_source_register(irn, 1);
426 be_emit_cstring(", ");
427 sparc_emit_source_register(irn, 0);
428 be_emit_cstring(", ");
429 sparc_emit_source_register(irn, 0);
430 be_emit_finish_line_gas(irn);
434 * TODO: not really tested but seems to work with memperm_arity == 1
436 static void emit_be_MemPerm(const ir_node *node)
441 ir_graph *irg = get_irn_irg(node);
442 be_stack_layout_t *layout = be_get_irg_stack_layout(irg);
444 /* this implementation only works with frame pointers currently */
445 assert(layout->sp_relative == false);
447 /* TODO: this implementation is slower than necessary.
448 The longterm goal is however to avoid the memperm node completely */
450 memperm_arity = be_get_MemPerm_entity_arity(node);
451 // we use our local registers - so this is limited to 8 inputs !
452 if (memperm_arity > 8)
453 panic("memperm with more than 8 inputs not supported yet");
455 be_emit_irprintf("\tsub %%sp, %d, %%sp", memperm_arity*4);
456 be_emit_finish_line_gas(node);
458 for (i = 0; i < memperm_arity; ++i) {
459 ir_entity *entity = be_get_MemPerm_in_entity(node, i);
460 int offset = be_get_stack_entity_offset(layout, entity, 0);
463 be_emit_irprintf("\tst %%l%d, [%%sp%+d]", i, sp_change + SPARC_MIN_STACKSIZE);
464 be_emit_finish_line_gas(node);
466 /* load from entity */
467 be_emit_irprintf("\tld [%%fp%+d], %%l%d", offset, i);
468 be_emit_finish_line_gas(node);
472 for (i = memperm_arity-1; i >= 0; --i) {
473 ir_entity *entity = be_get_MemPerm_out_entity(node, i);
474 int offset = be_get_stack_entity_offset(layout, entity, 0);
478 /* store to new entity */
479 be_emit_irprintf("\tst %%l%d, [%%fp%+d]", i, offset);
480 be_emit_finish_line_gas(node);
481 /* restore register */
482 be_emit_irprintf("\tld [%%sp%+d], %%l%d", sp_change + SPARC_MIN_STACKSIZE, i);
483 be_emit_finish_line_gas(node);
486 be_emit_irprintf("\tadd %%sp, %d, %%sp", memperm_arity*4);
487 be_emit_finish_line_gas(node);
489 assert(sp_change == 0);
495 static void emit_sparc_SymConst(const ir_node *irn)
497 const sparc_symconst_attr_t *attr = get_sparc_symconst_attr_const(irn);
499 //sethi %hi(const32),%reg
500 //or %reg,%lo(const32),%reg
502 be_emit_cstring("\tsethi %hi(");
503 be_gas_emit_entity(attr->entity);
504 be_emit_cstring("), ");
505 sparc_emit_dest_register(irn, 0);
506 be_emit_cstring("\n ");
508 // TODO: could be combined with the following load/store instruction
509 be_emit_cstring("\tor ");
510 sparc_emit_dest_register(irn, 0);
511 be_emit_cstring(", %lo(");
512 be_gas_emit_entity(attr->entity);
513 be_emit_cstring("), ");
514 sparc_emit_dest_register(irn, 0);
515 be_emit_finish_line_gas(irn);
519 * Emits code for FrameAddr fix
521 static void emit_sparc_FrameAddr(const ir_node *irn)
523 const sparc_symconst_attr_t *attr = get_irn_generic_attr_const(irn);
525 // no need to fix offset as we are adressing via the framepointer
526 if (attr->fp_offset >= 0) {
527 be_emit_cstring("\tadd ");
528 sparc_emit_source_register(irn, 0);
529 be_emit_cstring(", ");
530 be_emit_irprintf("%ld", attr->fp_offset);
532 be_emit_cstring("\tsub ");
533 sparc_emit_source_register(irn, 0);
534 be_emit_cstring(", ");
535 be_emit_irprintf("%ld", -attr->fp_offset);
538 be_emit_cstring(", ");
539 sparc_emit_dest_register(irn, 0);
540 be_emit_finish_line_gas(irn);
545 * Emits code for Branch
547 static void emit_sparc_BXX(const ir_node *node)
549 const sparc_jmp_cond_attr_t *attr = get_sparc_jmp_cond_attr_const(node);
550 int proj_num = attr->proj_num;
551 bool is_unsigned = attr->is_unsigned;
552 const ir_node *proj_true = NULL;
553 const ir_node *proj_false = NULL;
554 const ir_edge_t *edge;
555 const ir_node *block;
556 const ir_node *next_block;
559 foreach_out_edge(node, edge) {
560 ir_node *proj = get_edge_src_irn(edge);
561 long nr = get_Proj_proj(proj);
562 if (nr == pn_Cond_true) {
569 /* for now, the code works for scheduled and non-schedules blocks */
570 block = get_nodes_block(node);
572 /* we have a block schedule */
573 next_block = get_irn_link(block);
575 assert(proj_num != pn_Cmp_False);
576 assert(proj_num != pn_Cmp_True);
578 if (get_irn_link(proj_true) == next_block) {
579 /* exchange both proj's so the second one can be omitted */
580 const ir_node *t = proj_true;
582 proj_true = proj_false;
584 proj_num = get_negated_pnc(proj_num, mode_Iu);
589 case pn_Cmp_Eq: suffix = "e"; break;
590 case pn_Cmp_Lt: suffix = "lu"; break;
591 case pn_Cmp_Le: suffix = "leu"; break;
592 case pn_Cmp_Gt: suffix = "gu"; break;
593 case pn_Cmp_Ge: suffix = "geu"; break;
594 case pn_Cmp_Lg: suffix = "ne"; break;
595 default: panic("Cmp has unsupported pnc");
599 case pn_Cmp_Eq: suffix = "e"; break;
600 case pn_Cmp_Lt: suffix = "l"; break;
601 case pn_Cmp_Le: suffix = "le"; break;
602 case pn_Cmp_Gt: suffix = "g"; break;
603 case pn_Cmp_Ge: suffix = "ge"; break;
604 case pn_Cmp_Lg: suffix = "ne"; break;
605 default: panic("Cmp has unsupported pnc");
609 /* emit the true proj */
610 be_emit_cstring("\tb");
611 be_emit_string(suffix);
613 sparc_emit_cfop_target(proj_true);
614 be_emit_finish_line_gas(proj_true);
616 be_emit_cstring("\tnop");
617 be_emit_pad_comment();
618 be_emit_cstring("/* TODO: use delay slot */\n");
620 if (get_irn_link(proj_false) == next_block) {
621 be_emit_cstring("\t/* false-fallthrough to ");
622 sparc_emit_cfop_target(proj_false);
623 be_emit_cstring(" */");
624 be_emit_finish_line_gas(proj_false);
626 be_emit_cstring("\tba ");
627 sparc_emit_cfop_target(proj_false);
628 be_emit_finish_line_gas(proj_false);
629 be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
630 be_emit_finish_line_gas(proj_false);
635 * emit Jmp (which actually is a branch always (ba) instruction)
637 static void emit_sparc_Ba(const ir_node *node)
639 ir_node *block, *next_block;
641 /* for now, the code works for scheduled and non-schedules blocks */
642 block = get_nodes_block(node);
644 /* we have a block schedule */
645 next_block = get_irn_link(block);
646 if (get_irn_link(node) != next_block) {
647 be_emit_cstring("\tba ");
648 sparc_emit_cfop_target(node);
649 be_emit_finish_line_gas(node);
650 be_emit_cstring("\tnop\t\t/* TODO: use delay slot */\n");
652 be_emit_cstring("\t/* fallthrough to ");
653 sparc_emit_cfop_target(node);
654 be_emit_cstring(" */");
656 be_emit_finish_line_gas(node);
662 static void emit_be_Copy(const ir_node *irn)
664 ir_mode *mode = get_irn_mode(irn);
666 if (get_in_reg(irn, 0) == get_out_reg(irn, 0)) {
671 if (mode_is_float(mode)) {
672 panic("emit_be_Copy: move not supported for FP");
673 } else if (mode_is_data(mode)) {
674 be_emit_cstring("\tmov ");
675 sparc_emit_source_register(irn, 0);
676 be_emit_cstring(", ");
677 sparc_emit_dest_register(irn, 0);
678 be_emit_finish_line_gas(irn);
680 panic("emit_be_Copy: move not supported for this mode");
686 * dummy emitter for ignored nodes
688 static void emit_nothing(const ir_node *irn)
696 * type of emitter function
698 typedef void (*emit_func) (const ir_node *);
701 * Set a node emitter. Make it a bit more type safe.
703 static inline void set_emitter(ir_op *op, emit_func sparc_emit_node)
705 op->ops.generic = (op_func)sparc_emit_node;
709 * Enters the emitter functions for handled nodes into the generic
710 * pointer of an opcode.
712 static void sparc_register_emitters(void)
714 /* first clear the generic function pointer for all ops */
715 clear_irp_opcodes_generic_func();
716 /* register all emitter functions defined in spec */
717 sparc_register_spec_emitters();
720 set_emitter(op_be_Copy, emit_be_Copy);
721 set_emitter(op_be_CopyKeep, emit_be_Copy);
722 set_emitter(op_be_IncSP, emit_be_IncSP);
723 set_emitter(op_be_MemPerm, emit_be_MemPerm);
724 set_emitter(op_be_Perm, emit_be_Perm);
725 set_emitter(op_be_Return, emit_be_Return);
726 set_emitter(op_sparc_BXX, emit_sparc_BXX);
727 set_emitter(op_sparc_Call, emit_sparc_Call);
728 set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
729 set_emitter(op_sparc_HiImm, emit_sparc_HiImm);
730 set_emitter(op_sparc_Ba, emit_sparc_Ba);
731 set_emitter(op_sparc_LoImm, emit_sparc_LoImm);
732 set_emitter(op_sparc_Mulh, emit_sparc_Mulh);
733 set_emitter(op_sparc_Save, emit_sparc_Save);
734 set_emitter(op_sparc_SymConst, emit_sparc_SymConst);
736 /* no need to emit anything for the following nodes */
737 set_emitter(op_be_Barrier, emit_nothing);
738 set_emitter(op_be_Keep, emit_nothing);
739 set_emitter(op_be_Start, emit_nothing);
740 set_emitter(op_Phi, emit_nothing);
744 * Emits code for a node.
746 static void sparc_emit_node(const ir_node *node)
748 ir_op *op = get_irn_op(node);
750 if (op->ops.generic) {
751 emit_func func = (emit_func) op->ops.generic;
752 be_dbg_set_dbg_info(get_irn_dbg_info(node));
755 panic("Error: No emit handler for node %+F (graph %+F)\n",
756 node, current_ir_graph);
761 * Walks over the nodes in a block connected by scheduling edges
762 * and emits code for each node.
764 static void sparc_gen_block(ir_node *block, void *data)
769 if (! is_Block(block))
772 be_gas_emit_block_name(block);
773 be_emit_cstring(":\n");
774 be_emit_write_line();
776 sched_foreach(block, node) {
777 sparc_emit_node(node);
783 * Emits code for function start.
785 static void sparc_emit_func_prolog(ir_graph *irg)
787 ir_entity *ent = get_irg_entity(irg);
788 be_gas_emit_function_prolog(ent, 4);
789 be_emit_write_line();
793 * Emits code for function end
795 static void sparc_emit_func_epilog(ir_graph *irg)
797 ir_entity *ent = get_irg_entity(irg);
798 const char *irg_name = get_entity_ld_name(ent);
799 be_emit_write_line();
800 be_emit_irprintf("\t.size %s, .-%s\n", irg_name, irg_name);
801 be_emit_cstring("# -- End ");
802 be_emit_string(irg_name);
803 be_emit_cstring("\n");
804 be_emit_write_line();
809 * TODO: Sets labels for control flow nodes (jump target).
810 * Links control predecessors to there destination blocks.
812 static void sparc_gen_labels(ir_node *block, void *env)
815 int n = get_Block_n_cfgpreds(block);
818 for (n--; n >= 0; n--) {
819 pred = get_Block_cfgpred(block, n);
820 set_irn_link(pred, block); // link the pred of a block (which is a jmp)
828 void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
831 ir_node *last_block = NULL;
832 ir_entity *entity = get_irg_entity(irg);
836 be_gas_elf_type_char = '#';
837 be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF_SPARC;
839 /* register all emitter functions */
840 sparc_register_emitters();
841 be_dbg_method_begin(entity);
843 /* create the block schedule. For now, we don't need it earlier. */
844 blk_sched = be_create_block_schedule(irg);
846 // emit function prolog
847 sparc_emit_func_prolog(irg);
849 // generate BLOCK labels
850 irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);
852 // inject block scheduling links & emit code of each block
853 n = ARR_LEN(blk_sched);
854 for (i = 0; i < n;) {
855 ir_node *block, *next_bl;
857 block = blk_sched[i];
859 next_bl = i < n ? blk_sched[i] : NULL;
861 /* set here the link. the emitter expects to find the next block here */
862 set_irn_link(block, next_bl);
863 sparc_gen_block(block, last_block);
867 // emit function epilog
868 sparc_emit_func_epilog(irg);
871 void sparc_init_emitter(void)
873 FIRM_DBG_REGISTER(dbg, "firm.be.sparc.emit");