2 * emit-x86.c: Support functions for emitting x86 code
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Miguel de Icaza (miguel@ximian.com)
8 * (C) 2001 Ximian, Inc.
14 #include <mono/metadata/assembly.h>
15 #include <mono/metadata/loader.h>
16 #include <mono/metadata/cil-coff.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/class.h>
19 #include <mono/metadata/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/arch/x86/x86-codegen.h>
22 #include <mono/metadata/profiler-private.h>
30 //#define DEBUG_REGALLOC
31 //#define DEBUG_SPILLS
34 arch_get_reg_name (int regnum)
55 g_assert_not_reached ();
61 * we may want a x86-specific header or we
62 * can just declare it extern in x86.brg.
64 int mono_x86_have_cmov = 0;
67 cpuid (int id, int* p_eax, int* p_ebx, int* p_ecx, int* p_edx)
70 __asm__ __volatile__ (
74 "xorl $0x200000, %%eax\n"
80 "andl $0x200000, %%eax\n"
88 __asm__ __volatile__ ("cpuid"
89 : "=a" (*p_eax), "=b" (*p_ebx), "=c" (*p_ecx), "=d" (*p_edx)
97 mono_cpu_detect (void) {
98 int eax, ebx, ecx, edx;
100 /* Feature Flags function, flags returned in EDX. */
101 if (cpuid(1, &eax, &ebx, &ecx, &edx)) {
102 if (edx & (1U << 15)) {
103 mono_x86_have_cmov = 1;
109 enter_method (MonoMethod *method, char *ebp)
116 fname = mono_method_full_name (method, TRUE);
117 printf ("ENTER: %s\n(", fname);
120 if (((int)ebp & 3) != 0) {
121 g_error ("unaligned stack detected (%p)", ebp);
126 if (ISSTRUCT (method->signature->ret)) {
129 g_assert (!method->signature->ret->byref);
131 size = mono_type_stack_size (method->signature->ret, &align);
133 printf ("VALUERET:%p, ", *((gpointer *)ebp));
134 ebp += sizeof (gpointer);
137 if (method->signature->hasthis) {
138 if (method->klass->valuetype) {
139 printf ("value:%p, ", *((gpointer *)ebp));
141 o = *((MonoObject **)ebp);
144 class = o->vtable->klass;
146 if (class == mono_defaults.string_class) {
147 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
149 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
152 printf ("this:NULL, ");
154 ebp += sizeof (gpointer);
157 for (i = 0; i < method->signature->param_count; ++i) {
158 MonoType *type = method->signature->params [i];
160 size = mono_type_stack_size (type, &align);
163 printf ("[BYREF:%p], ", *((gpointer *)ebp));
164 } else switch (type->type) {
166 case MONO_TYPE_BOOLEAN:
176 printf ("%d, ", *((int *)(ebp)));
178 case MONO_TYPE_STRING: {
179 MonoString *s = *((MonoString **)ebp);
181 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
182 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
184 printf ("[STRING:null], ");
187 case MONO_TYPE_CLASS:
188 case MONO_TYPE_OBJECT: {
189 o = *((MonoObject **)ebp);
191 class = o->vtable->klass;
193 if (class == mono_defaults.string_class) {
194 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
195 } else if (class == mono_defaults.int32_class) {
196 printf ("[INT32:%p:%d], ", o, *(gint32 *)((char *)o + sizeof (MonoObject)));
198 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
200 printf ("%p, ", *((gpointer *)(ebp)));
205 case MONO_TYPE_FNPTR:
206 case MONO_TYPE_ARRAY:
207 case MONO_TYPE_SZARRAY:
208 printf ("%p, ", *((gpointer *)(ebp)));
211 printf ("%lld, ", *((gint64 *)(ebp)));
214 printf ("%f, ", *((float *)(ebp)));
217 printf ("%f, ", *((double *)(ebp)));
219 case MONO_TYPE_VALUETYPE:
221 for (j = 0; j < size; j++)
222 printf ("%02x,", *((guint8*)ebp +j));
229 g_assert (align == 4 || align == 8);
230 ebp += size + align - 1;
231 ebp = (gpointer)((unsigned)ebp & ~(align - 1));
238 leave_method (MonoMethod *method, int edx, int eax, double test)
243 fname = mono_method_full_name (method, TRUE);
244 printf ("LEAVE: %s", fname);
247 switch (method->signature->ret->type) {
250 case MONO_TYPE_BOOLEAN:
252 printf ("TRUE:%d", eax);
266 printf ("EAX=%d", eax);
268 case MONO_TYPE_STRING: {
269 MonoString *s = (MonoString *)eax;
272 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
273 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
275 printf ("[STRING:null], ");
278 case MONO_TYPE_OBJECT: {
279 MonoObject *o = (MonoObject *)eax;
282 if (o->vtable->klass == mono_defaults.boolean_class) {
283 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
284 } else if (o->vtable->klass == mono_defaults.int32_class) {
285 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
286 } else if (o->vtable->klass == mono_defaults.int64_class) {
287 printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
289 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
291 printf ("[OBJECT:%p]", o);
295 case MONO_TYPE_CLASS:
297 case MONO_TYPE_FNPTR:
298 case MONO_TYPE_ARRAY:
299 case MONO_TYPE_SZARRAY:
300 printf ("EAX=%p", (gpointer)eax);
303 *((gint32 *)&l) = eax;
304 *((gint32 *)&l + 1) = edx;
305 printf ("EAX/EDX=%lld", l);
308 printf ("FP=%f\n", test);
311 printf ("(unknown return type)");
318 * arch_emit_prologue:
319 * @cfg: pointer to status information
321 * Emits the function prolog.
324 arch_emit_prologue (MonoFlowGraph *cfg)
326 MonoMethod *method = cfg->method;
327 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
328 int i, j, k, alloc_size, pos;
330 x86_push_reg (cfg->code, X86_EBP);
331 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
333 alloc_size = cfg->locals_size;
336 if (method->save_lmf) {
338 pos += sizeof (MonoLMF);
340 /* save the current IP */
341 cfg->lmfip_offset = cfg->code + 1 - cfg->start;
342 x86_push_imm (cfg->code, 0);
343 /* save all caller saved regs */
344 x86_push_reg (cfg->code, X86_EBX);
345 x86_push_reg (cfg->code, X86_EDI);
346 x86_push_reg (cfg->code, X86_ESI);
347 x86_push_reg (cfg->code, X86_EBP);
349 /* save method info */
350 x86_push_imm (cfg->code, method);
352 /* get the address of lmf for the current thread */
353 x86_call_code (cfg->code, mono_get_lmf_addr);
355 x86_push_reg (cfg->code, X86_EAX);
356 /* push *lfm (previous_lmf) */
357 x86_push_membase (cfg->code, X86_EAX, 0);
359 x86_mov_membase_reg (cfg->code, X86_EAX, 0, X86_ESP, 4);
362 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
363 x86_push_reg (cfg->code, X86_EBX);
367 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
368 x86_push_reg (cfg->code, X86_EDI);
372 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
373 x86_push_reg (cfg->code, X86_ESI);
380 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, alloc_size);
382 if (mono_jit_trace_calls) {
383 x86_push_reg (cfg->code, X86_EBP);
384 x86_push_imm (cfg->code, cfg->method);
385 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
386 x86_call_reg (cfg->code, X86_EAX);
387 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
389 if (mono_jit_profile) {
390 x86_push_imm (cfg->code, cfg->method);
391 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_enter);
392 x86_call_reg (cfg->code, X86_EAX);
393 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
396 /* initialize local vars */
397 if (header->num_locals) {
398 gboolean unassigned_locals = TRUE;
400 if (cfg->bblocks [0].live_in_set) {
401 i = mono_bitset_find_first (cfg->bblocks [0].live_in_set,
402 cfg->locals_start_index - 1);
403 unassigned_locals = (i >= 0 && i < cfg->locals_start_index +
407 if (unassigned_locals && header->init_locals) {
408 MonoVarInfo *vi = &VARINFO (cfg, cfg->locals_start_index + header->num_locals - 1);
409 int offset = vi->offset;
413 /* do not clear caller saved registers */
416 for (i = 0; i < header->num_locals; ++i) {
417 MonoVarInfo *rv = &VARINFO (cfg, cfg->locals_start_index + i);
420 int ind = 1 << rv->reg;
422 x86_alu_reg_reg (cfg->code, X86_XOR, rv->reg, rv->reg);
427 if (size == 1 || size == 2 || size == 4) {
428 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, size);
436 for (k = 0; k < i; k++) {
437 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
442 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
446 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 1);
451 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
452 x86_push_reg (cfg->code, X86_EDI);
453 x86_lea_membase (cfg->code, X86_EDI, X86_EBP, offset);
454 x86_alu_reg_reg (cfg->code, X86_XOR, X86_EAX, X86_EAX);
455 x86_mov_reg_imm (cfg->code, X86_ECX, i);
457 x86_prefix (cfg->code, X86_REP_PREFIX);
458 x86_stosl (cfg->code);
459 for (i = 0; i < j; i++)
460 x86_stosb (cfg->code);
461 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
462 x86_pop_reg (cfg->code, X86_EDI);
466 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
467 x86_mov_membase_imm (cfg->code, X86_EBP, offset + 2, 0, 1);
472 /* we always need to initialize object pointers */
474 for (i = 0; i < header->num_locals; ++i) {
475 MonoType *t = header->locals [i];
476 int offset = VARINFO (cfg, cfg->locals_start_index + i).offset;
479 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
484 case MONO_TYPE_STRING:
485 case MONO_TYPE_CLASS:
486 case MONO_TYPE_ARRAY:
487 case MONO_TYPE_SZARRAY:
488 case MONO_TYPE_OBJECT:
489 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
499 * arch_emit_epilogue:
500 * @cfg: pointer to status information
502 * Emits the function epilog.
505 arch_emit_epilogue (MonoFlowGraph *cfg)
509 * note: with trace and profiling the value on the FP stack may get clobbered.
511 if (mono_jit_trace_calls) {
512 x86_fld_reg (cfg->code, 0);
513 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
514 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
515 x86_push_reg (cfg->code, X86_EAX);
516 x86_push_reg (cfg->code, X86_EDX);
517 x86_push_imm (cfg->code, cfg->method);
518 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
519 x86_call_reg (cfg->code, X86_EAX);
520 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
521 x86_pop_reg (cfg->code, X86_EDX);
522 x86_pop_reg (cfg->code, X86_EAX);
523 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
525 if (mono_jit_profile) {
526 x86_push_reg (cfg->code, X86_EAX);
527 x86_push_reg (cfg->code, X86_EDX);
528 x86_push_imm (cfg->code, cfg->method);
529 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_leave);
530 x86_call_reg (cfg->code, X86_EAX);
531 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
532 x86_pop_reg (cfg->code, X86_EDX);
533 x86_pop_reg (cfg->code, X86_EAX);
536 if (cfg->method->save_lmf) {
537 pos = -sizeof (MonoLMF) - 4;
541 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
542 x86_mov_reg_membase (cfg->code, X86_EBX, X86_EBP, pos, 4);
545 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
546 x86_mov_reg_membase (cfg->code, X86_EDI, X86_EBP, pos, 4);
549 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
550 x86_mov_reg_membase (cfg->code, X86_ESI, X86_EBP, pos, 4);
554 if (cfg->method->save_lmf) {
555 pos = -sizeof (MonoLMF);
557 x86_lea_membase (cfg->code, X86_ESP, X86_EBP, pos);
559 /* ebx = previous_lmf */
560 x86_pop_reg (cfg->code, X86_EBX);
562 x86_pop_reg (cfg->code, X86_EDI);
563 /* *(lmf) = previous_lmf */
564 x86_mov_membase_reg (cfg->code, X86_EDI, 0, X86_EBX, 4);
566 /* discard method info */
567 x86_pop_reg (cfg->code, X86_ESI);
569 /* restore caller saved regs */
570 x86_pop_reg (cfg->code, X86_EBP);
571 x86_pop_reg (cfg->code, X86_ESI);
572 x86_pop_reg (cfg->code, X86_EDI);
573 x86_pop_reg (cfg->code, X86_EBX);
577 x86_leave (cfg->code);
582 arch_allocate_var (MonoFlowGraph *cfg, int size, int align, MonoVarType vartype, MonoValueType type)
586 mono_jit_stats.allocate_var++;
588 vi.range.last_use.abs_pos = 0;
589 vi.range.first_use.pos.bid = 0xffff;
590 vi.range.first_use.pos.tid = 0;
593 vi.varnum = cfg->varinfo->len;
595 if (size != sizeof (gpointer))
600 case MONO_LOCALVAR: {
601 cfg->locals_size += size;
602 cfg->locals_size += align - 1;
603 cfg->locals_size &= ~(align - 1);
605 SET_VARINFO (vi, type, vartype, - cfg->locals_size, size);
606 g_array_append_val (cfg->varinfo, vi);
610 int arg_start = 8 + cfg->has_vtarg*4;
612 g_assert ((align & 3) == 0);
614 SET_VARINFO (vi, type, vartype, cfg->args_size + arg_start, size);
615 g_array_append_val (cfg->varinfo, vi);
617 cfg->args_size += size;
619 cfg->args_size &= ~3;
623 g_assert_not_reached ();
626 return cfg->varinfo->len - 1;
630 mono_label_cfg (MonoFlowGraph *cfg)
634 for (i = 0; i < cfg->block_count; i++) {
635 GPtrArray *forest = cfg->bblocks [i].forest;
638 if (!cfg->bblocks [i].reached) /* unreachable code */
643 for (j = 0; j < top; j++) {
644 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
647 mbstate = mono_burg_label (t1, cfg);
650 if (mono_debug_format != MONO_DEBUG_FORMAT_NONE)
652 g_warning ("tree does not match in %s",
653 mono_method_full_name (cfg->method, TRUE));
654 mono_print_ctree (cfg, t1); printf ("\n\n");
656 mono_print_forest (cfg, forest);
657 g_assert_not_reached ();
666 tree_allocate_regs (MonoFlowGraph *cfg, MBTree *tree, int goal, MonoRegSet *rs,
667 guint8 exclude_mask, int *spillcount)
670 int ern = mono_burg_rule (tree->state, goal);
671 const guint16 *nts = mono_burg_nts [ern];
672 guint8 left_exclude_mask = 0, right_exclude_mask = 0;
675 #ifdef DEBUG_REGALLOC
676 printf ("tree_allocate_regs start %d %08x %d %d\n", tree->op, rs->free_mask, goal,
677 (nts [0] && kids [0] == tree));
680 mono_burg_kids (tree, ern, kids);
686 exclude_mask |= (1 << X86_ECX);
687 left_exclude_mask |= (1 << X86_ECX);
690 case MB_TERM_MUL_OVF:
691 case MB_TERM_MUL_OVF_UN:
696 if (goal == MB_NTERM_reg) {
697 left_exclude_mask |= (1 << X86_EDX);
698 right_exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
705 if (nts [0] && kids [0] == tree) {
707 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, exclude_mask, spillcount))
728 if (nts [1]) { /* two kids */
731 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
736 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
738 #ifdef DEBUG_REGALLOC
739 printf ("tree_allocate_regs try 1 failed %d %d %d %d\n",
740 nts [1], kids [1]->reg1,
741 kids [1]->reg2,kids [1]->reg3);
745 if (kids [0]->reg1 != -1) {
746 right_exclude_mask |= 1 << kids [0]->reg1;
749 if (kids [0]->reg2 != -1) {
750 right_exclude_mask |= 1 << kids [0]->reg2;
753 if (kids [0]->reg3 != -1) {
754 right_exclude_mask |= 1 << kids [0]->reg3;
758 mono_regset_free_reg (rs, kids [0]->reg1);
759 mono_regset_free_reg (rs, kids [0]->reg2);
760 mono_regset_free_reg (rs, kids [0]->reg3);
762 kids [0]->spilled = 1;
764 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
765 #ifdef DEBUG_REGALLOC
766 printf ("tree_allocate_regs try 2 failed\n");
770 #ifdef DEBUG_REGALLOC
771 printf ("tree_allocate_regs try 2 succesfull\n");
776 if (nts [3]) /* we cant handle four kids */
777 g_assert_not_reached ();
779 if (!tree_allocate_regs (cfg, kids [2], nts [2], rs, right_exclude_mask, spillcount))
784 } else { /* one kid */
785 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
791 for (i = 0; nts [i]; i++) {
792 mono_regset_free_reg (rs, kids [i]->reg1);
793 mono_regset_free_reg (rs, kids [i]->reg2);
794 mono_regset_free_reg (rs, kids [i]->reg3);
797 tree->emit = mono_burg_func [ern];
800 case MB_TERM_CALL_I4:
801 case MB_TERM_CALL_I8:
802 case MB_TERM_CALL_R8:
803 // case MB_TERM_CALL_VOID :
804 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
806 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
808 if ((tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, exclude_mask)) == -1)
816 case MB_TERM_MUL_OVF_UN:
821 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
823 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
827 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
835 case MB_TERM_MUL_OVF:
836 case MB_TERM_MUL_OVF_UN:
841 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
843 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
847 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
849 if ((tree->reg2 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
855 /* fixme: allocate floating point registers */
859 if (tree->op == MB_TERM_ADD) {
860 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
862 if ((tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, exclude_mask)) == -1)
868 if (tree->op == MB_TERM_ADD) {
869 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
875 if (tree->op == MB_TERM_SHL ||
876 tree->op == MB_TERM_MUL) {
877 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
887 #ifdef DEBUG_REGALLOC
888 printf ("tree_allocate_regs end %d %08x\n", tree->op, rs->free_mask);
894 arch_allocate_regs (MonoFlowGraph *cfg)
896 int i, j, max_spillcount = 0;
898 for (i = 0; i < cfg->block_count; i++) {
899 GPtrArray *forest = cfg->bblocks [i].forest;
902 if (!cfg->bblocks [i].reached) /* unreachable code */
907 for (j = 0; j < top; j++) {
908 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
910 #ifdef DEBUG_REGALLOC
911 printf ("arch_allocate_regs start %d:%d %08x\n", i, j, cfg->rs->free_mask);
913 if (!tree_allocate_regs (cfg, t1, 1, cfg->rs, 0, &spillcount)) {
914 mono_print_ctree (cfg, t1);
916 g_error ("register allocation failed");
919 max_spillcount = MAX (max_spillcount, spillcount);
921 #ifdef DEBUG_REGALLOC
922 printf ("arch_allocate_regs end %d:%d %08x\n", i, j, cfg->rs->free_mask);
924 g_assert (cfg->rs->free_mask == 0xffffffff);
928 /* allocate space for spilled regs */
930 cfg->spillvars = mono_mempool_alloc0 (cfg->mp, sizeof (gint) * max_spillcount);
931 cfg->spillcount = max_spillcount;
933 for (i = 0; i < max_spillcount; i++) {
935 spillvar = arch_allocate_var (cfg, sizeof (gpointer), sizeof (gpointer),
936 MONO_TEMPVAR, VAL_I32);
937 cfg->spillvars [i] = VARINFO (cfg, spillvar).offset;
942 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree, int *spillcount)
945 int ern = mono_burg_rule (tree->state, goal);
946 const guint16 *nts = mono_burg_nts [ern];
950 mono_burg_kids (tree, ern, kids);
954 int spilloffset1, spilloffset2, spilloffset3;
956 tree_emit (nts [0], cfg, kids [0], spillcount);
958 if (kids [0]->spilled) {
960 printf ("SPILL_REGS %d %03x %s.%s:%s\n",
961 nts [0], cfg->code - cfg->start,
962 cfg->method->klass->name_space,
963 cfg->method->klass->name, cfg->method->name);
965 mono_print_ctree (cfg, kids [0]);printf ("\n\n");
971 if (kids [0]->reg1 != -1) {
972 spilloffset1 = cfg->spillvars [(*spillcount)++];
973 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset1,
976 if (kids [0]->reg2 != -1) {
977 spilloffset2 = cfg->spillvars [(*spillcount)++];
978 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset2,
981 if (kids [0]->reg3 != -1) {
982 spilloffset3 = cfg->spillvars [(*spillcount)++];
983 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset3,
988 tree_emit (nts [1], cfg, kids [1], spillcount);
990 if (kids [0]->spilled) {
993 printf ("RELOAD_REGS %03x %s.%s:%s\n",
994 cfg->code - cfg->start,
995 cfg->method->klass->name_space,
996 cfg->method->klass->name, cfg->method->name);
999 if (kids [0]->reg3 != -1)
1000 x86_mov_reg_membase (cfg->code, kids [0]->reg3, X86_EBP,
1002 if (kids [0]->reg2 != -1)
1003 x86_mov_reg_membase (cfg->code, kids [0]->reg2, X86_EBP,
1005 if (kids [0]->reg1 != -1)
1006 x86_mov_reg_membase (cfg->code, kids [0]->reg1, X86_EBP,
1011 g_assert (!nts [3]);
1012 tree_emit (nts [2], cfg, kids [2], spillcount);
1015 tree_emit (nts [0], cfg, kids [0], spillcount);
1019 g_assert ((*spillcount) <= cfg->spillcount);
1021 tree->addr = offset = cfg->code - cfg->start;
1023 /* we assume an instruction uses a maximum of 128 bytes */
1024 if ((cfg->code_size - offset) <= 128) {
1025 int add = MIN (cfg->code_size, 128);
1026 cfg->code_size += add;
1027 mono_jit_stats.code_reallocs++;
1028 cfg->start = g_realloc (cfg->start, cfg->code_size);
1029 g_assert (cfg->start);
1030 cfg->code = cfg->start + offset;
1033 if ((emit = mono_burg_func [ern]))
1036 g_assert ((cfg->code - cfg->start) < cfg->code_size);
1040 mono_emit_cfg (MonoFlowGraph *cfg)
1042 int i, j, spillcount;
1044 for (i = 0; i < cfg->block_count; i++) {
1045 MonoBBlock *bb = &cfg->bblocks [i];
1046 GPtrArray *forest = bb->forest;
1049 if (!bb->reached) /* unreachable code */
1054 bb->addr = cfg->code - cfg->start;
1056 for (j = 0; j < top; j++) {
1057 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
1060 tree_emit (1, cfg, t1, &spillcount);
1064 cfg->epilog = cfg->code - cfg->start;
1068 mono_compute_branches (MonoFlowGraph *cfg)
1076 for (j = 0; j < cfg->block_count; j++) {
1077 MonoBBlock *bb = &cfg->bblocks [j];
1078 GPtrArray *forest = bb->forest;
1081 if (!bb->reached) /* unreachable code */
1086 for (i = 0; i < top; i++) {
1087 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
1089 if (t1->op == MB_TERM_SWITCH) {
1090 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
1091 guint32 *rt = (guint32 *)t1->data.p;
1092 int m = *((guint32 *)t1->data.p) + 1;
1095 for (k = 1; k <= m; k++)
1096 rt [k] = (int)(jt [k]->addr + cfg->start);
1098 /* emit the switch instruction again to update addresses */
1099 cfg->code = cfg->start + t1->addr;
1100 ((MBEmitFunc)t1->emit) (t1, cfg);
1107 for (ji = cfg->jump_info; ji; ji = ji->next) {
1108 unsigned char *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
1109 unsigned char *target;
1112 case MONO_JUMP_INFO_BB:
1113 target = ji->data.bb->addr + cfg->start;
1115 case MONO_JUMP_INFO_ABS:
1116 target = ji->data.target;
1118 case MONO_JUMP_INFO_EPILOG:
1119 target = cfg->epilog + cfg->start;
1121 case MONO_JUMP_INFO_IP:
1122 *(unsigned char**)ip = ip;
1125 g_assert_not_reached ();
1127 x86_patch (ip, target);
1130 /* patch the IP in the LMF saving code */
1131 if (cfg->lmfip_offset) {
1132 *((guint32 *)(cfg->start + cfg->lmfip_offset)) =
1133 (gint32)(cfg->start + cfg->lmfip_offset);
1138 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
1140 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
1143 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
1144 ji->data.target = target;
1145 ji->next = cfg->jump_info;
1147 cfg->jump_info = ji;
1151 arch_jit_compile_cfg (MonoDomain *target_domain, MonoFlowGraph *cfg)
1154 guint32 ls_used_mask = 0;
1155 MonoMethod *method = cfg->method;
1157 ji = mono_mempool_alloc0 (target_domain->mp, sizeof (MonoJitInfo));
1159 cfg->rs = mono_regset_new (X86_NREG);
1160 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1161 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1163 /* we can use this regs for global register allocation */
1164 mono_regset_reserve_reg (cfg->rs, X86_EBX);
1165 mono_regset_reserve_reg (cfg->rs, X86_ESI);
1167 if (mono_use_linear_scan) {
1168 mono_linear_scan (cfg, &ls_used_mask);
1169 cfg->rs->used_mask |= ls_used_mask;
1172 if (mono_jit_dump_forest) {
1174 printf ("FOREST %s\n", mono_method_full_name (method, TRUE));
1175 for (i = 0; i < cfg->block_count; i++) {
1176 printf ("BLOCK %d:\n", i);
1177 mono_print_forest (cfg, cfg->bblocks [i].forest);
1181 if (!mono_label_cfg (cfg))
1184 arch_allocate_regs (cfg);
1186 /* align to 8 byte boundary */
1187 cfg->locals_size += 7;
1188 cfg->locals_size &= ~7;
1190 arch_emit_prologue (cfg);
1191 cfg->prologue_end = cfg->code - cfg->start;
1192 mono_emit_cfg (cfg);
1193 arch_emit_epilogue (cfg);
1194 cfg->epilogue_end = cfg->code - cfg->start;
1196 mono_compute_branches (cfg);
1198 ji->code_size = cfg->code - cfg->start;
1199 ji->used_regs = cfg->rs->used_mask;
1200 ji->method = method;
1201 ji->code_start = cfg->start;