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 mono_get_param_info (method->signature, -1, &size, &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) {
159 MonoType *type = mono_get_param_info (method->signature, i, &size, &align);
162 printf ("[BYREF:%p], ", *((gpointer *)ebp));
163 } else switch (type->type) {
165 case MONO_TYPE_BOOLEAN:
175 printf ("%d, ", *((int *)(ebp)));
177 case MONO_TYPE_STRING: {
178 MonoString *s = *((MonoString **)ebp);
180 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
181 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
183 printf ("[STRING:null], ");
186 case MONO_TYPE_CLASS:
187 case MONO_TYPE_OBJECT: {
188 o = *((MonoObject **)ebp);
190 class = o->vtable->klass;
192 if (class == mono_defaults.string_class) {
193 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
194 } else if (class == mono_defaults.int32_class) {
195 printf ("[INT32:%p:%d], ", o, *(gint32 *)((char *)o + sizeof (MonoObject)));
197 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
199 printf ("%p, ", *((gpointer *)(ebp)));
204 case MONO_TYPE_FNPTR:
205 case MONO_TYPE_ARRAY:
206 case MONO_TYPE_SZARRAY:
207 printf ("%p, ", *((gpointer *)(ebp)));
210 printf ("%lld, ", *((gint64 *)(ebp)));
213 printf ("%f, ", *((float *)(ebp)));
216 printf ("%f, ", *((double *)(ebp)));
218 case MONO_TYPE_VALUETYPE:
220 for (j = 0; j < size; j++)
221 printf ("%02x,", *((guint8*)ebp +j));
228 g_assert (align == 4 || align == 8);
229 ebp += size + align - 1;
230 ebp = (gpointer)((unsigned)ebp & ~(align - 1));
237 leave_method (MonoMethod *method, int edx, int eax, double test)
242 fname = mono_method_full_name (method, TRUE);
243 printf ("LEAVE: %s", fname);
246 switch (method->signature->ret->type) {
249 case MONO_TYPE_BOOLEAN:
251 printf ("TRUE:%d", eax);
265 printf ("EAX=%d", eax);
267 case MONO_TYPE_STRING: {
268 MonoString *s = (MonoString *)eax;
271 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
272 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
274 printf ("[STRING:null], ");
277 case MONO_TYPE_OBJECT: {
278 MonoObject *o = (MonoObject *)eax;
281 if (o->vtable->klass == mono_defaults.boolean_class) {
282 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
283 } else if (o->vtable->klass == mono_defaults.int32_class) {
284 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
285 } else if (o->vtable->klass == mono_defaults.int64_class) {
286 printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
288 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
290 printf ("[OBJECT:%p]", o);
294 case MONO_TYPE_CLASS:
296 case MONO_TYPE_FNPTR:
297 case MONO_TYPE_ARRAY:
298 case MONO_TYPE_SZARRAY:
299 printf ("EAX=%p", (gpointer)eax);
302 *((gint32 *)&l) = eax;
303 *((gint32 *)&l + 1) = edx;
304 printf ("EAX/EDX=%lld", l);
307 printf ("FP=%f\n", test);
310 printf ("(unknown return type)");
317 * arch_emit_prologue:
318 * @cfg: pointer to status information
320 * Emits the function prolog.
323 arch_emit_prologue (MonoFlowGraph *cfg)
325 MonoMethod *method = cfg->method;
326 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
327 int i, j, k, alloc_size, pos;
329 x86_push_reg (cfg->code, X86_EBP);
330 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
332 alloc_size = cfg->locals_size;
335 if (method->save_lmf) {
337 pos += sizeof (MonoLMF);
339 /* save the current IP */
340 cfg->lmfip_offset = cfg->code + 1 - cfg->start;
341 x86_push_imm (cfg->code, 0);
342 /* save all caller saved regs */
343 x86_push_reg (cfg->code, X86_EBX);
344 x86_push_reg (cfg->code, X86_EDI);
345 x86_push_reg (cfg->code, X86_ESI);
346 x86_push_reg (cfg->code, X86_EBP);
348 /* save method info */
349 x86_push_imm (cfg->code, method);
351 /* get the address of lmf for the current thread */
352 x86_call_code (cfg->code, mono_get_lmf_addr);
354 x86_push_reg (cfg->code, X86_EAX);
355 /* push *lfm (previous_lmf) */
356 x86_push_membase (cfg->code, X86_EAX, 0);
358 x86_mov_membase_reg (cfg->code, X86_EAX, 0, X86_ESP, 4);
361 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
362 x86_push_reg (cfg->code, X86_EBX);
366 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
367 x86_push_reg (cfg->code, X86_EDI);
371 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
372 x86_push_reg (cfg->code, X86_ESI);
379 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, alloc_size);
381 if (mono_jit_trace_calls) {
382 x86_push_reg (cfg->code, X86_EBP);
383 x86_push_imm (cfg->code, cfg->method);
384 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
385 x86_call_reg (cfg->code, X86_EAX);
386 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
388 if (mono_jit_profile) {
389 x86_push_imm (cfg->code, cfg->method);
390 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_enter);
391 x86_call_reg (cfg->code, X86_EAX);
392 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
395 /* initialize local vars */
396 if (header->num_locals) {
397 gboolean unassigned_locals = TRUE;
399 if (cfg->bblocks [0].live_in_set) {
400 i = mono_bitset_find_first (cfg->bblocks [0].live_in_set,
401 cfg->locals_start_index - 1);
402 unassigned_locals = (i >= 0 && i < cfg->locals_start_index +
406 if (unassigned_locals && header->init_locals) {
407 MonoVarInfo *vi = &VARINFO (cfg, cfg->locals_start_index + header->num_locals - 1);
408 int offset = vi->offset;
412 /* do not clear caller saved registers */
415 for (i = 0; i < header->num_locals; ++i) {
416 MonoVarInfo *rv = &VARINFO (cfg, cfg->locals_start_index + i);
419 int ind = 1 << rv->reg;
421 x86_alu_reg_reg (cfg->code, X86_XOR, rv->reg, rv->reg);
426 if (size == 1 || size == 2 || size == 4) {
427 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, size);
435 for (k = 0; k < i; k++) {
436 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
441 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
445 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 1);
450 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
451 x86_push_reg (cfg->code, X86_EDI);
452 x86_lea_membase (cfg->code, X86_EDI, X86_EBP, offset);
453 x86_alu_reg_reg (cfg->code, X86_XOR, X86_EAX, X86_EAX);
454 x86_mov_reg_imm (cfg->code, X86_ECX, i);
456 x86_prefix (cfg->code, X86_REP_PREFIX);
457 x86_stosl (cfg->code);
458 for (i = 0; i < j; i++)
459 x86_stosb (cfg->code);
460 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
461 x86_pop_reg (cfg->code, X86_EDI);
465 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
466 x86_mov_membase_imm (cfg->code, X86_EBP, offset + 2, 0, 1);
471 /* we always need to initialize object pointers */
473 for (i = 0; i < header->num_locals; ++i) {
474 MonoType *t = header->locals [i];
475 int offset = VARINFO (cfg, cfg->locals_start_index + i).offset;
478 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
483 case MONO_TYPE_STRING:
484 case MONO_TYPE_CLASS:
485 case MONO_TYPE_ARRAY:
486 case MONO_TYPE_SZARRAY:
487 case MONO_TYPE_OBJECT:
488 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
498 * arch_emit_epilogue:
499 * @cfg: pointer to status information
501 * Emits the function epilog.
504 arch_emit_epilogue (MonoFlowGraph *cfg)
508 * note: with trace and profiling the value on the FP stack may get clobbered.
510 if (mono_jit_trace_calls) {
511 x86_fld_reg (cfg->code, 0);
512 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
513 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
514 x86_push_reg (cfg->code, X86_EAX);
515 x86_push_reg (cfg->code, X86_EDX);
516 x86_push_imm (cfg->code, cfg->method);
517 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
518 x86_call_reg (cfg->code, X86_EAX);
519 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
520 x86_pop_reg (cfg->code, X86_EDX);
521 x86_pop_reg (cfg->code, X86_EAX);
522 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
524 if (mono_jit_profile) {
525 x86_push_reg (cfg->code, X86_EAX);
526 x86_push_reg (cfg->code, X86_EDX);
527 x86_push_imm (cfg->code, cfg->method);
528 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_leave);
529 x86_call_reg (cfg->code, X86_EAX);
530 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
531 x86_pop_reg (cfg->code, X86_EDX);
532 x86_pop_reg (cfg->code, X86_EAX);
535 if (cfg->method->save_lmf) {
536 pos = -sizeof (MonoLMF) - 4;
540 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
541 x86_mov_reg_membase (cfg->code, X86_EBX, X86_EBP, pos, 4);
544 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
545 x86_mov_reg_membase (cfg->code, X86_EDI, X86_EBP, pos, 4);
548 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
549 x86_mov_reg_membase (cfg->code, X86_ESI, X86_EBP, pos, 4);
553 if (cfg->method->save_lmf) {
554 pos = -sizeof (MonoLMF);
556 x86_lea_membase (cfg->code, X86_ESP, X86_EBP, pos);
558 /* ebx = previous_lmf */
559 x86_pop_reg (cfg->code, X86_EBX);
561 x86_pop_reg (cfg->code, X86_EDI);
562 /* *(lmf) = previous_lmf */
563 x86_mov_membase_reg (cfg->code, X86_EDI, 0, X86_EBX, 4);
565 /* discard method info */
566 x86_pop_reg (cfg->code, X86_ESI);
568 /* restore caller saved regs */
569 x86_pop_reg (cfg->code, X86_EBP);
570 x86_pop_reg (cfg->code, X86_ESI);
571 x86_pop_reg (cfg->code, X86_EDI);
572 x86_pop_reg (cfg->code, X86_EBX);
576 x86_leave (cfg->code);
581 arch_allocate_var (MonoFlowGraph *cfg, int size, int align, MonoVarType vartype, MonoValueType type)
585 mono_jit_stats.allocate_var++;
587 vi.range.last_use.abs_pos = 0;
588 vi.range.first_use.pos.bid = 0xffff;
589 vi.range.first_use.pos.tid = 0;
592 vi.varnum = cfg->varinfo->len;
594 if (size != sizeof (gpointer))
599 case MONO_LOCALVAR: {
600 cfg->locals_size += size;
601 cfg->locals_size += align - 1;
602 cfg->locals_size &= ~(align - 1);
604 SET_VARINFO (vi, type, vartype, - cfg->locals_size, size);
605 g_array_append_val (cfg->varinfo, vi);
609 int arg_start = 8 + cfg->has_vtarg*4;
611 g_assert ((align & 3) == 0);
613 SET_VARINFO (vi, type, vartype, cfg->args_size + arg_start, size);
614 g_array_append_val (cfg->varinfo, vi);
616 cfg->args_size += size;
618 cfg->args_size &= ~3;
622 g_assert_not_reached ();
625 return cfg->varinfo->len - 1;
629 mono_label_cfg (MonoFlowGraph *cfg)
633 for (i = 0; i < cfg->block_count; i++) {
634 GPtrArray *forest = cfg->bblocks [i].forest;
637 if (!cfg->bblocks [i].reached) /* unreachable code */
642 for (j = 0; j < top; j++) {
643 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
646 mbstate = mono_burg_label (t1, cfg);
649 if (mono_debug_format != MONO_DEBUG_FORMAT_NONE)
651 g_warning ("tree does not match in %s",
652 mono_method_full_name (cfg->method, TRUE));
653 mono_print_ctree (cfg, t1); printf ("\n\n");
655 mono_print_forest (cfg, forest);
656 g_assert_not_reached ();
665 tree_allocate_regs (MonoFlowGraph *cfg, MBTree *tree, int goal, MonoRegSet *rs,
666 guint8 exclude_mask, int *spillcount)
669 int ern = mono_burg_rule (tree->state, goal);
670 const guint16 *nts = mono_burg_nts [ern];
671 guint8 left_exclude_mask = 0, right_exclude_mask = 0;
674 #ifdef DEBUG_REGALLOC
675 printf ("tree_allocate_regs start %d %08x %d %d\n", tree->op, rs->free_mask, goal,
676 (nts [0] && kids [0] == tree));
679 mono_burg_kids (tree, ern, kids);
685 exclude_mask |= (1 << X86_ECX);
686 left_exclude_mask |= (1 << X86_ECX);
689 case MB_TERM_MUL_OVF:
690 case MB_TERM_MUL_OVF_UN:
695 if (goal == MB_NTERM_reg) {
696 left_exclude_mask |= (1 << X86_EDX);
697 right_exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
704 if (nts [0] && kids [0] == tree) {
706 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, exclude_mask, spillcount))
727 if (nts [1]) { /* two kids */
730 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
735 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
737 #ifdef DEBUG_REGALLOC
738 printf ("tree_allocate_regs try 1 failed %d %d %d %d\n",
739 nts [1], kids [1]->reg1,
740 kids [1]->reg2,kids [1]->reg3);
744 if (kids [0]->reg1 != -1) {
745 right_exclude_mask |= 1 << kids [0]->reg1;
748 if (kids [0]->reg2 != -1) {
749 right_exclude_mask |= 1 << kids [0]->reg2;
752 if (kids [0]->reg3 != -1) {
753 right_exclude_mask |= 1 << kids [0]->reg3;
757 mono_regset_free_reg (rs, kids [0]->reg1);
758 mono_regset_free_reg (rs, kids [0]->reg2);
759 mono_regset_free_reg (rs, kids [0]->reg3);
761 kids [0]->spilled = 1;
763 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
764 #ifdef DEBUG_REGALLOC
765 printf ("tree_allocate_regs try 2 failed\n");
769 #ifdef DEBUG_REGALLOC
770 printf ("tree_allocate_regs try 2 succesfull\n");
775 if (nts [3]) /* we cant handle four kids */
776 g_assert_not_reached ();
778 if (!tree_allocate_regs (cfg, kids [2], nts [2], rs, right_exclude_mask, spillcount))
783 } else { /* one kid */
784 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
790 for (i = 0; nts [i]; i++) {
791 mono_regset_free_reg (rs, kids [i]->reg1);
792 mono_regset_free_reg (rs, kids [i]->reg2);
793 mono_regset_free_reg (rs, kids [i]->reg3);
796 tree->emit = mono_burg_func [ern];
799 case MB_TERM_CALL_I4:
800 case MB_TERM_CALL_I8:
801 case MB_TERM_CALL_R8:
802 // case MB_TERM_CALL_VOID :
803 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
805 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
807 if ((tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, exclude_mask)) == -1)
815 case MB_TERM_MUL_OVF_UN:
820 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
822 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
826 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
834 case MB_TERM_MUL_OVF:
835 case MB_TERM_MUL_OVF_UN:
840 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
842 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
846 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
848 if ((tree->reg2 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
854 /* fixme: allocate floating point registers */
858 if (tree->op == MB_TERM_ADD) {
859 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
861 if ((tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, exclude_mask)) == -1)
867 if (tree->op == MB_TERM_ADD) {
868 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
874 if (tree->op == MB_TERM_SHL ||
875 tree->op == MB_TERM_MUL) {
876 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
886 #ifdef DEBUG_REGALLOC
887 printf ("tree_allocate_regs end %d %08x\n", tree->op, rs->free_mask);
893 arch_allocate_regs (MonoFlowGraph *cfg)
895 int i, j, max_spillcount = 0;
897 for (i = 0; i < cfg->block_count; i++) {
898 GPtrArray *forest = cfg->bblocks [i].forest;
901 if (!cfg->bblocks [i].reached) /* unreachable code */
906 for (j = 0; j < top; j++) {
907 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
909 #ifdef DEBUG_REGALLOC
910 printf ("arch_allocate_regs start %d:%d %08x\n", i, j, cfg->rs->free_mask);
912 if (!tree_allocate_regs (cfg, t1, 1, cfg->rs, 0, &spillcount)) {
913 mono_print_ctree (cfg, t1);
915 g_error ("register allocation failed");
918 max_spillcount = MAX (max_spillcount, spillcount);
920 #ifdef DEBUG_REGALLOC
921 printf ("arch_allocate_regs end %d:%d %08x\n", i, j, cfg->rs->free_mask);
923 g_assert (cfg->rs->free_mask == 0xffffffff);
927 /* allocate space for spilled regs */
929 cfg->spillvars = mono_mempool_alloc0 (cfg->mp, sizeof (gint) * max_spillcount);
930 cfg->spillcount = max_spillcount;
932 for (i = 0; i < max_spillcount; i++) {
934 spillvar = arch_allocate_var (cfg, sizeof (gpointer), sizeof (gpointer),
935 MONO_TEMPVAR, VAL_I32);
936 cfg->spillvars [i] = VARINFO (cfg, spillvar).offset;
941 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree, int *spillcount)
944 int ern = mono_burg_rule (tree->state, goal);
945 const guint16 *nts = mono_burg_nts [ern];
949 mono_burg_kids (tree, ern, kids);
953 int spilloffset1, spilloffset2, spilloffset3;
955 tree_emit (nts [0], cfg, kids [0], spillcount);
957 if (kids [0]->spilled) {
959 printf ("SPILL_REGS %d %03x %s.%s:%s\n",
960 nts [0], cfg->code - cfg->start,
961 cfg->method->klass->name_space,
962 cfg->method->klass->name, cfg->method->name);
964 mono_print_ctree (cfg, kids [0]);printf ("\n\n");
970 if (kids [0]->reg1 != -1) {
971 spilloffset1 = cfg->spillvars [(*spillcount)++];
972 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset1,
975 if (kids [0]->reg2 != -1) {
976 spilloffset2 = cfg->spillvars [(*spillcount)++];
977 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset2,
980 if (kids [0]->reg3 != -1) {
981 spilloffset3 = cfg->spillvars [(*spillcount)++];
982 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset3,
987 tree_emit (nts [1], cfg, kids [1], spillcount);
989 if (kids [0]->spilled) {
992 printf ("RELOAD_REGS %03x %s.%s:%s\n",
993 cfg->code - cfg->start,
994 cfg->method->klass->name_space,
995 cfg->method->klass->name, cfg->method->name);
998 if (kids [0]->reg3 != -1)
999 x86_mov_reg_membase (cfg->code, kids [0]->reg3, X86_EBP,
1001 if (kids [0]->reg2 != -1)
1002 x86_mov_reg_membase (cfg->code, kids [0]->reg2, X86_EBP,
1004 if (kids [0]->reg1 != -1)
1005 x86_mov_reg_membase (cfg->code, kids [0]->reg1, X86_EBP,
1010 g_assert (!nts [3]);
1011 tree_emit (nts [2], cfg, kids [2], spillcount);
1014 tree_emit (nts [0], cfg, kids [0], spillcount);
1018 g_assert ((*spillcount) <= cfg->spillcount);
1020 tree->addr = offset = cfg->code - cfg->start;
1022 /* we assume an instruction uses a maximum of 128 bytes */
1023 if ((cfg->code_size - offset) <= 128) {
1024 int add = MIN (cfg->code_size, 128);
1025 cfg->code_size += add;
1026 mono_jit_stats.code_reallocs++;
1027 cfg->start = g_realloc (cfg->start, cfg->code_size);
1028 g_assert (cfg->start);
1029 cfg->code = cfg->start + offset;
1032 if ((emit = mono_burg_func [ern]))
1035 g_assert ((cfg->code - cfg->start) < cfg->code_size);
1039 mono_emit_cfg (MonoFlowGraph *cfg)
1041 int i, j, spillcount;
1043 for (i = 0; i < cfg->block_count; i++) {
1044 MonoBBlock *bb = &cfg->bblocks [i];
1045 GPtrArray *forest = bb->forest;
1048 if (!bb->reached) /* unreachable code */
1053 bb->addr = cfg->code - cfg->start;
1055 for (j = 0; j < top; j++) {
1056 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
1059 tree_emit (1, cfg, t1, &spillcount);
1063 cfg->epilog = cfg->code - cfg->start;
1067 mono_compute_branches (MonoFlowGraph *cfg)
1075 for (j = 0; j < cfg->block_count; j++) {
1076 MonoBBlock *bb = &cfg->bblocks [j];
1077 GPtrArray *forest = bb->forest;
1080 if (!bb->reached) /* unreachable code */
1085 for (i = 0; i < top; i++) {
1086 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
1088 if (t1->op == MB_TERM_SWITCH) {
1089 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
1090 guint32 *rt = (guint32 *)t1->data.p;
1091 int m = *((guint32 *)t1->data.p) + 1;
1094 for (k = 1; k <= m; k++)
1095 rt [k] = (int)(jt [k]->addr + cfg->start);
1097 /* emit the switch instruction again to update addresses */
1098 cfg->code = cfg->start + t1->addr;
1099 ((MBEmitFunc)t1->emit) (t1, cfg);
1106 for (ji = cfg->jump_info; ji; ji = ji->next) {
1107 unsigned char *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
1108 unsigned char *target;
1111 case MONO_JUMP_INFO_BB:
1112 target = ji->data.bb->addr + cfg->start;
1114 case MONO_JUMP_INFO_ABS:
1115 target = ji->data.target;
1117 case MONO_JUMP_INFO_EPILOG:
1118 target = cfg->epilog + cfg->start;
1120 case MONO_JUMP_INFO_IP:
1121 *(unsigned char**)ip = ip;
1124 g_assert_not_reached ();
1126 x86_patch (ip, target);
1129 /* patch the IP in the LMF saving code */
1130 if (cfg->lmfip_offset) {
1131 *((guint32 *)(cfg->start + cfg->lmfip_offset)) =
1132 (gint32)(cfg->start + cfg->lmfip_offset);
1137 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
1139 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
1142 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
1143 ji->data.target = target;
1144 ji->next = cfg->jump_info;
1146 cfg->jump_info = ji;
1150 arch_jit_compile_cfg (MonoDomain *target_domain, MonoFlowGraph *cfg)
1153 guint32 ls_used_mask = 0;
1154 MonoMethod *method = cfg->method;
1156 ji = mono_mempool_alloc0 (target_domain->mp, sizeof (MonoJitInfo));
1158 cfg->rs = mono_regset_new (X86_NREG);
1159 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1160 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1162 /* we can use this regs for global register allocation */
1163 mono_regset_reserve_reg (cfg->rs, X86_EBX);
1164 mono_regset_reserve_reg (cfg->rs, X86_ESI);
1166 if (mono_use_linear_scan) {
1167 mono_linear_scan (cfg, &ls_used_mask);
1168 cfg->rs->used_mask |= ls_used_mask;
1171 if (mono_jit_dump_forest) {
1173 printf ("FOREST %s\n", mono_method_full_name (method, TRUE));
1174 for (i = 0; i < cfg->block_count; i++) {
1175 printf ("BLOCK %d:\n", i);
1176 mono_print_forest (cfg, cfg->bblocks [i].forest);
1180 if (!mono_label_cfg (cfg))
1183 arch_allocate_regs (cfg);
1185 /* align to 8 byte boundary */
1186 cfg->locals_size += 7;
1187 cfg->locals_size &= ~7;
1189 arch_emit_prologue (cfg);
1190 cfg->prologue_end = cfg->code - cfg->start;
1191 mono_emit_cfg (cfg);
1192 arch_emit_epilogue (cfg);
1193 cfg->epilogue_end = cfg->code - cfg->start;
1195 mono_compute_branches (cfg);
1197 ji->code_size = cfg->code - cfg->start;
1198 ji->used_regs = cfg->rs->used_mask;
1199 ji->method = method;
1200 ji->code_start = cfg->start;