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)
73 __asm__ __volatile__ (
77 "xorl $0x200000, %%eax\n"
83 "andl $0x200000, %%eax\n"
91 __asm__ __volatile__ ("cpuid"
92 : "=a" (*p_eax), "=b" (*p_ebx), "=c" (*p_ecx), "=d" (*p_edx)
101 mono_cpu_detect (void) {
102 int eax, ebx, ecx, edx;
104 /* Feature Flags function, flags returned in EDX. */
105 if (cpuid(1, &eax, &ebx, &ecx, &edx)) {
106 if (edx & (1U << 15)) {
107 mono_x86_have_cmov = 1;
113 enter_method (MonoMethod *method, char *ebp)
120 fname = mono_method_full_name (method, TRUE);
121 printf ("ENTER: %s\n(", fname);
124 if (((int)ebp & 3) != 0) {
125 g_error ("unaligned stack detected (%p)", ebp);
130 if (MONO_TYPE_ISSTRUCT (method->signature->ret)) {
133 g_assert (!method->signature->ret->byref);
135 mono_get_param_info (method->signature, -1, &size, &align);
137 printf ("VALUERET:%p, ", *((gpointer *)ebp));
138 ebp += sizeof (gpointer);
141 if (method->signature->hasthis) {
142 if (method->klass->valuetype) {
143 printf ("value:%p, ", *((gpointer *)ebp));
145 o = *((MonoObject **)ebp);
148 class = o->vtable->klass;
150 if (class == mono_defaults.string_class) {
151 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
153 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
156 printf ("this:NULL, ");
158 ebp += sizeof (gpointer);
161 for (i = 0; i < method->signature->param_count; ++i) {
163 MonoType *type = mono_get_param_info (method->signature, i, &size, &align);
166 printf ("[BYREF:%p], ", *((gpointer *)ebp));
167 } else switch (type->type) {
169 case MONO_TYPE_BOOLEAN:
179 printf ("%d, ", *((int *)(ebp)));
181 case MONO_TYPE_STRING: {
182 MonoString *s = *((MonoString **)ebp);
184 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
185 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
187 printf ("[STRING:null], ");
190 case MONO_TYPE_CLASS:
191 case MONO_TYPE_OBJECT: {
192 o = *((MonoObject **)ebp);
194 class = o->vtable->klass;
196 if (class == mono_defaults.string_class) {
197 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
198 } else if (class == mono_defaults.int32_class) {
199 printf ("[INT32:%p:%d], ", o, *(gint32 *)((char *)o + sizeof (MonoObject)));
201 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
203 printf ("%p, ", *((gpointer *)(ebp)));
208 case MONO_TYPE_FNPTR:
209 case MONO_TYPE_ARRAY:
210 case MONO_TYPE_SZARRAY:
211 printf ("%p, ", *((gpointer *)(ebp)));
214 printf ("%lld, ", *((gint64 *)(ebp)));
217 printf ("%f, ", *((float *)(ebp)));
220 printf ("%f, ", *((double *)(ebp)));
222 case MONO_TYPE_VALUETYPE:
224 for (j = 0; j < size; j++)
225 printf ("%02x,", *((guint8*)ebp +j));
232 g_assert (align == 4 || align == 8);
233 ebp += size + align - 1;
234 ebp = (gpointer)((unsigned)ebp & ~(align - 1));
241 leave_method (MonoMethod *method, int edx, int eax, double test)
246 fname = mono_method_full_name (method, TRUE);
247 printf ("LEAVE: %s", fname);
250 switch (method->signature->ret->type) {
253 case MONO_TYPE_BOOLEAN:
255 printf ("TRUE:%d", eax);
269 printf ("EAX=%d", eax);
271 case MONO_TYPE_STRING: {
272 MonoString *s = (MonoString *)eax;
275 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
276 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
278 printf ("[STRING:null], ");
281 case MONO_TYPE_OBJECT: {
282 MonoObject *o = (MonoObject *)eax;
285 if (o->vtable->klass == mono_defaults.boolean_class) {
286 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
287 } else if (o->vtable->klass == mono_defaults.int32_class) {
288 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
289 } else if (o->vtable->klass == mono_defaults.int64_class) {
290 printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
292 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
294 printf ("[OBJECT:%p]", o);
298 case MONO_TYPE_CLASS:
300 case MONO_TYPE_FNPTR:
301 case MONO_TYPE_ARRAY:
302 case MONO_TYPE_SZARRAY:
303 printf ("EAX=%p", (gpointer)eax);
306 *((gint32 *)&l) = eax;
307 *((gint32 *)&l + 1) = edx;
308 printf ("EAX/EDX=%lld", l);
311 printf ("FP=%f\n", test);
314 printf ("(unknown return type)");
321 * arch_emit_prologue:
322 * @cfg: pointer to status information
324 * Emits the function prolog.
327 arch_emit_prologue (MonoFlowGraph *cfg)
329 MonoMethod *method = cfg->method;
330 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
331 int i, j, k, alloc_size, pos;
333 x86_push_reg (cfg->code, X86_EBP);
334 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
336 alloc_size = cfg->locals_size;
339 if (method->save_lmf) {
341 pos += sizeof (MonoLMF);
343 /* save the current IP */
344 cfg->lmfip_offset = cfg->code + 1 - cfg->start;
345 x86_push_imm (cfg->code, 0);
346 /* save all caller saved regs */
347 x86_push_reg (cfg->code, X86_EBX);
348 x86_push_reg (cfg->code, X86_EDI);
349 x86_push_reg (cfg->code, X86_ESI);
350 x86_push_reg (cfg->code, X86_EBP);
352 /* save method info */
353 x86_push_imm (cfg->code, method);
355 /* get the address of lmf for the current thread */
356 x86_call_code (cfg->code, mono_get_lmf_addr);
358 x86_push_reg (cfg->code, X86_EAX);
359 /* push *lfm (previous_lmf) */
360 x86_push_membase (cfg->code, X86_EAX, 0);
362 x86_mov_membase_reg (cfg->code, X86_EAX, 0, X86_ESP, 4);
365 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
366 x86_push_reg (cfg->code, X86_EBX);
370 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
371 x86_push_reg (cfg->code, X86_EDI);
375 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
376 x86_push_reg (cfg->code, X86_ESI);
383 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, alloc_size);
385 if (mono_jit_trace_calls) {
386 x86_push_reg (cfg->code, X86_EBP);
387 x86_push_imm (cfg->code, cfg->method);
388 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
389 x86_call_reg (cfg->code, X86_EAX);
390 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
392 if (mono_jit_profile) {
393 x86_push_imm (cfg->code, cfg->method);
394 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_enter);
395 x86_call_reg (cfg->code, X86_EAX);
396 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
399 /* initialize local vars */
400 if (header->num_locals) {
401 gboolean unassigned_locals = TRUE;
403 if (cfg->bblocks [0].live_in_set) {
404 i = mono_bitset_find_first (cfg->bblocks [0].live_in_set,
405 cfg->locals_start_index - 1);
406 unassigned_locals = (i >= 0 && i < cfg->locals_start_index +
410 if (unassigned_locals && header->init_locals) {
411 MonoVarInfo *vi = &VARINFO (cfg, cfg->locals_start_index + header->num_locals - 1);
412 int offset = vi->offset;
416 /* do not clear caller saved registers */
419 for (i = 0; i < header->num_locals; ++i) {
420 MonoVarInfo *rv = &VARINFO (cfg, cfg->locals_start_index + i);
423 int ind = 1 << rv->reg;
425 x86_alu_reg_reg (cfg->code, X86_XOR, rv->reg, rv->reg);
430 if (size == 1 || size == 2 || size == 4) {
431 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, size);
439 for (k = 0; k < i; k++) {
440 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
445 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
449 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 1);
454 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
455 x86_push_reg (cfg->code, X86_EDI);
456 x86_lea_membase (cfg->code, X86_EDI, X86_EBP, offset);
457 x86_alu_reg_reg (cfg->code, X86_XOR, X86_EAX, X86_EAX);
458 x86_mov_reg_imm (cfg->code, X86_ECX, i);
460 x86_prefix (cfg->code, X86_REP_PREFIX);
461 x86_stosl (cfg->code);
462 for (i = 0; i < j; i++)
463 x86_stosb (cfg->code);
464 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
465 x86_pop_reg (cfg->code, X86_EDI);
469 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
470 x86_mov_membase_imm (cfg->code, X86_EBP, offset + 2, 0, 1);
475 /* we always need to initialize object pointers */
477 for (i = 0; i < header->num_locals; ++i) {
478 MonoType *t = header->locals [i];
479 int offset = VARINFO (cfg, cfg->locals_start_index + i).offset;
482 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
487 case MONO_TYPE_STRING:
488 case MONO_TYPE_CLASS:
489 case MONO_TYPE_ARRAY:
490 case MONO_TYPE_SZARRAY:
491 case MONO_TYPE_OBJECT:
492 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
502 * arch_emit_epilogue:
503 * @cfg: pointer to status information
505 * Emits the function epilog.
508 arch_emit_epilogue (MonoFlowGraph *cfg)
512 * note: with trace and profiling the value on the FP stack may get clobbered.
514 if (mono_jit_trace_calls) {
515 x86_fld_reg (cfg->code, 0);
516 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
517 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
518 x86_push_reg (cfg->code, X86_EAX);
519 x86_push_reg (cfg->code, X86_EDX);
520 x86_push_imm (cfg->code, cfg->method);
521 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
522 x86_call_reg (cfg->code, X86_EAX);
523 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
524 x86_pop_reg (cfg->code, X86_EDX);
525 x86_pop_reg (cfg->code, X86_EAX);
526 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
528 if (mono_jit_profile) {
529 x86_push_reg (cfg->code, X86_EAX);
530 x86_push_reg (cfg->code, X86_EDX);
531 x86_push_imm (cfg->code, cfg->method);
532 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_leave);
533 x86_call_reg (cfg->code, X86_EAX);
534 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
535 x86_pop_reg (cfg->code, X86_EDX);
536 x86_pop_reg (cfg->code, X86_EAX);
539 if (cfg->method->save_lmf) {
540 pos = -sizeof (MonoLMF) - 4;
544 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
545 x86_mov_reg_membase (cfg->code, X86_EBX, X86_EBP, pos, 4);
548 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
549 x86_mov_reg_membase (cfg->code, X86_EDI, X86_EBP, pos, 4);
552 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
553 x86_mov_reg_membase (cfg->code, X86_ESI, X86_EBP, pos, 4);
557 if (cfg->method->save_lmf) {
558 pos = -sizeof (MonoLMF);
560 x86_lea_membase (cfg->code, X86_ESP, X86_EBP, pos);
562 /* ebx = previous_lmf */
563 x86_pop_reg (cfg->code, X86_EBX);
565 x86_pop_reg (cfg->code, X86_EDI);
566 /* *(lmf) = previous_lmf */
567 x86_mov_membase_reg (cfg->code, X86_EDI, 0, X86_EBX, 4);
569 /* discard method info */
570 x86_pop_reg (cfg->code, X86_ESI);
572 /* restore caller saved regs */
573 x86_pop_reg (cfg->code, X86_EBP);
574 x86_pop_reg (cfg->code, X86_ESI);
575 x86_pop_reg (cfg->code, X86_EDI);
576 x86_pop_reg (cfg->code, X86_EBX);
580 x86_leave (cfg->code);
585 arch_allocate_var (MonoFlowGraph *cfg, int size, int align, MonoVarType vartype, MonoValueType type)
589 mono_jit_stats.allocate_var++;
591 vi.range.last_use.abs_pos = 0;
592 vi.range.first_use.pos.bid = 0xffff;
593 vi.range.first_use.pos.tid = 0;
596 vi.varnum = cfg->varinfo->len;
598 if (size != sizeof (gpointer))
603 case MONO_LOCALVAR: {
604 cfg->locals_size += size;
605 cfg->locals_size += align - 1;
606 cfg->locals_size &= ~(align - 1);
608 SET_VARINFO (vi, type, vartype, - cfg->locals_size, size);
609 g_array_append_val (cfg->varinfo, vi);
613 int arg_start = 8 + cfg->has_vtarg*4;
615 g_assert ((align & 3) == 0);
617 SET_VARINFO (vi, type, vartype, cfg->args_size + arg_start, size);
618 g_array_append_val (cfg->varinfo, vi);
620 cfg->args_size += size;
622 cfg->args_size &= ~3;
626 g_assert_not_reached ();
629 return cfg->varinfo->len - 1;
633 mono_label_cfg (MonoFlowGraph *cfg)
637 for (i = 0; i < cfg->block_count; i++) {
638 GPtrArray *forest = cfg->bblocks [i].forest;
641 if (!cfg->bblocks [i].reached) /* unreachable code */
646 for (j = 0; j < top; j++) {
647 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
650 mbstate = mono_burg_label (t1, cfg);
653 if (mono_debug_format != MONO_DEBUG_FORMAT_NONE)
655 g_warning ("tree does not match in %s: 0x%04x",
656 mono_method_full_name (cfg->method, TRUE), t1->cli_addr);
657 mono_print_ctree (cfg, t1); printf ("\n\n");
659 mono_print_forest (cfg, forest);
660 g_assert_not_reached ();
669 tree_allocate_regs (MonoFlowGraph *cfg, MBTree *tree, int goal, MonoRegSet *rs,
670 guint8 exclude_mask, int *spillcount)
673 int ern = mono_burg_rule (tree->state, goal);
674 const guint16 *nts = mono_burg_nts [ern];
675 guint8 left_exclude_mask = 0, right_exclude_mask = 0;
678 #ifdef DEBUG_REGALLOC
679 printf ("tree_allocate_regs start %d %08x %d %d\n", tree->op, rs->free_mask, goal,
680 (nts [0] && kids [0] == tree));
683 mono_burg_kids (tree, ern, kids);
689 exclude_mask |= (1 << X86_ECX);
690 left_exclude_mask |= (1 << X86_ECX);
693 case MB_TERM_MUL_OVF:
694 case MB_TERM_MUL_OVF_UN:
699 if (goal == MB_NTERM_reg) {
700 left_exclude_mask |= (1 << X86_EDX);
701 right_exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
708 if (nts [0] && kids [0] == tree) {
710 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, exclude_mask, spillcount))
731 if (nts [1]) { /* two kids */
734 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
739 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
741 #ifdef DEBUG_REGALLOC
742 printf ("tree_allocate_regs try 1 failed %d %d %d %d\n",
743 nts [1], kids [1]->reg1,
744 kids [1]->reg2,kids [1]->reg3);
748 if (kids [0]->reg1 != -1) {
749 right_exclude_mask |= 1 << kids [0]->reg1;
752 if (kids [0]->reg2 != -1) {
753 right_exclude_mask |= 1 << kids [0]->reg2;
756 if (kids [0]->reg3 != -1) {
757 right_exclude_mask |= 1 << kids [0]->reg3;
761 mono_regset_free_reg (rs, kids [0]->reg1);
762 mono_regset_free_reg (rs, kids [0]->reg2);
763 mono_regset_free_reg (rs, kids [0]->reg3);
765 kids [0]->spilled = 1;
767 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
768 #ifdef DEBUG_REGALLOC
769 printf ("tree_allocate_regs try 2 failed\n");
773 #ifdef DEBUG_REGALLOC
774 printf ("tree_allocate_regs try 2 succesfull\n");
779 if (nts [3]) /* we cant handle four kids */
780 g_assert_not_reached ();
782 if (!tree_allocate_regs (cfg, kids [2], nts [2], rs, right_exclude_mask, spillcount))
787 } else { /* one kid */
788 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
794 for (i = 0; nts [i]; i++) {
795 mono_regset_free_reg (rs, kids [i]->reg1);
796 mono_regset_free_reg (rs, kids [i]->reg2);
797 mono_regset_free_reg (rs, kids [i]->reg3);
800 tree->emit = mono_burg_func [ern];
803 case MB_TERM_CALL_I4:
804 case MB_TERM_CALL_I8:
805 case MB_TERM_CALL_R8:
806 // case MB_TERM_CALL_VOID :
807 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
809 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
811 if ((tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, exclude_mask)) == -1)
819 case MB_TERM_MUL_OVF_UN:
824 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
826 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
830 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
838 case MB_TERM_MUL_OVF:
839 case MB_TERM_MUL_OVF_UN:
844 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
846 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
850 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
852 if ((tree->reg2 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
858 /* fixme: allocate floating point registers */
862 if (tree->op == MB_TERM_ADD) {
863 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
865 if ((tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, exclude_mask)) == -1)
871 if (tree->op == MB_TERM_ADD) {
872 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
878 if (tree->op == MB_TERM_SHL ||
879 tree->op == MB_TERM_MUL) {
880 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
890 #ifdef DEBUG_REGALLOC
891 printf ("tree_allocate_regs end %d %08x\n", tree->op, rs->free_mask);
897 arch_allocate_regs (MonoFlowGraph *cfg)
899 int i, j, max_spillcount = 0;
901 for (i = 0; i < cfg->block_count; i++) {
902 GPtrArray *forest = cfg->bblocks [i].forest;
905 if (!cfg->bblocks [i].reached) /* unreachable code */
910 for (j = 0; j < top; j++) {
911 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
913 #ifdef DEBUG_REGALLOC
914 printf ("arch_allocate_regs start %d:%d %08x\n", i, j, cfg->rs->free_mask);
916 if (!tree_allocate_regs (cfg, t1, 1, cfg->rs, 0, &spillcount)) {
917 mono_print_ctree (cfg, t1);
919 g_error ("register allocation failed");
922 max_spillcount = MAX (max_spillcount, spillcount);
924 #ifdef DEBUG_REGALLOC
925 printf ("arch_allocate_regs end %d:%d %08x\n", i, j, cfg->rs->free_mask);
927 g_assert (cfg->rs->free_mask == 0xffffffff);
931 /* allocate space for spilled regs */
933 cfg->spillvars = mono_mempool_alloc0 (cfg->mp, sizeof (gint) * max_spillcount);
934 cfg->spillcount = max_spillcount;
936 for (i = 0; i < max_spillcount; i++) {
938 spillvar = arch_allocate_var (cfg, sizeof (gpointer), sizeof (gpointer),
939 MONO_TEMPVAR, VAL_I32);
940 cfg->spillvars [i] = VARINFO (cfg, spillvar).offset;
945 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree, int *spillcount)
948 int ern = mono_burg_rule (tree->state, goal);
949 const guint16 *nts = mono_burg_nts [ern];
953 mono_burg_kids (tree, ern, kids);
957 int spilloffset1, spilloffset2, spilloffset3;
959 tree_emit (nts [0], cfg, kids [0], spillcount);
961 if (kids [0]->spilled) {
963 printf ("SPILL_REGS %d %03x %s.%s:%s\n",
964 nts [0], cfg->code - cfg->start,
965 cfg->method->klass->name_space,
966 cfg->method->klass->name, cfg->method->name);
968 mono_print_ctree (cfg, kids [0]);printf ("\n\n");
974 if (kids [0]->reg1 != -1) {
975 spilloffset1 = cfg->spillvars [(*spillcount)++];
976 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset1,
979 if (kids [0]->reg2 != -1) {
980 spilloffset2 = cfg->spillvars [(*spillcount)++];
981 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset2,
984 if (kids [0]->reg3 != -1) {
985 spilloffset3 = cfg->spillvars [(*spillcount)++];
986 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset3,
991 tree_emit (nts [1], cfg, kids [1], spillcount);
993 if (kids [0]->spilled) {
996 printf ("RELOAD_REGS %03x %s.%s:%s\n",
997 cfg->code - cfg->start,
998 cfg->method->klass->name_space,
999 cfg->method->klass->name, cfg->method->name);
1002 if (kids [0]->reg3 != -1)
1003 x86_mov_reg_membase (cfg->code, kids [0]->reg3, X86_EBP,
1005 if (kids [0]->reg2 != -1)
1006 x86_mov_reg_membase (cfg->code, kids [0]->reg2, X86_EBP,
1008 if (kids [0]->reg1 != -1)
1009 x86_mov_reg_membase (cfg->code, kids [0]->reg1, X86_EBP,
1014 g_assert (!nts [3]);
1015 tree_emit (nts [2], cfg, kids [2], spillcount);
1018 tree_emit (nts [0], cfg, kids [0], spillcount);
1022 g_assert ((*spillcount) <= cfg->spillcount);
1024 tree->addr = offset = cfg->code - cfg->start;
1026 /* we assume an instruction uses a maximum of 128 bytes */
1027 if ((cfg->code_size - offset) <= 128) {
1028 int add = MIN (cfg->code_size, 128);
1029 cfg->code_size += add;
1030 mono_jit_stats.code_reallocs++;
1031 cfg->start = g_realloc (cfg->start, cfg->code_size);
1032 g_assert (cfg->start);
1033 cfg->code = cfg->start + offset;
1036 if ((emit = mono_burg_func [ern]))
1039 g_assert ((cfg->code - cfg->start) < cfg->code_size);
1043 mono_emit_cfg (MonoFlowGraph *cfg)
1045 int i, j, spillcount;
1047 for (i = 0; i < cfg->block_count; i++) {
1048 MonoBBlock *bb = &cfg->bblocks [i];
1049 GPtrArray *forest = bb->forest;
1052 if (!bb->reached) /* unreachable code */
1057 bb->addr = cfg->code - cfg->start;
1059 for (j = 0; j < top; j++) {
1060 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
1063 tree_emit (1, cfg, t1, &spillcount);
1067 cfg->epilog = cfg->code - cfg->start;
1071 mono_compute_branches (MonoFlowGraph *cfg)
1079 for (j = 0; j < cfg->block_count; j++) {
1080 MonoBBlock *bb = &cfg->bblocks [j];
1081 GPtrArray *forest = bb->forest;
1084 if (!bb->reached) /* unreachable code */
1089 for (i = 0; i < top; i++) {
1090 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
1092 if (t1->op == MB_TERM_SWITCH) {
1093 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
1094 guint32 *rt = (guint32 *)t1->data.p;
1095 int m = *((guint32 *)t1->data.p) + 1;
1098 for (k = 1; k <= m; k++)
1099 rt [k] = (int)(jt [k]->addr + cfg->start);
1101 /* emit the switch instruction again to update addresses */
1102 cfg->code = cfg->start + t1->addr;
1103 ((MBEmitFunc)t1->emit) (t1, cfg);
1110 for (ji = cfg->jump_info; ji; ji = ji->next) {
1111 unsigned char *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
1112 unsigned char *target;
1115 case MONO_JUMP_INFO_BB:
1116 target = ji->data.bb->addr + cfg->start;
1118 case MONO_JUMP_INFO_ABS:
1119 target = ji->data.target;
1121 case MONO_JUMP_INFO_EPILOG:
1122 target = cfg->epilog + cfg->start;
1124 case MONO_JUMP_INFO_IP:
1125 *(unsigned char**)ip = ip;
1128 g_assert_not_reached ();
1130 x86_patch (ip, target);
1133 /* patch the IP in the LMF saving code */
1134 if (cfg->lmfip_offset) {
1135 *((guint32 *)(cfg->start + cfg->lmfip_offset)) =
1136 (gint32)(cfg->start + cfg->lmfip_offset);
1141 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
1143 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
1146 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
1147 ji->data.target = target;
1148 ji->next = cfg->jump_info;
1150 cfg->jump_info = ji;
1154 arch_jit_compile_cfg (MonoDomain *target_domain, MonoFlowGraph *cfg)
1157 guint32 ls_used_mask = 0;
1158 MonoMethod *method = cfg->method;
1160 ji = mono_mempool_alloc0 (target_domain->mp, sizeof (MonoJitInfo));
1162 cfg->rs = mono_regset_new (X86_NREG);
1163 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1164 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1166 /* we can use this regs for global register allocation */
1167 mono_regset_reserve_reg (cfg->rs, X86_EBX);
1168 mono_regset_reserve_reg (cfg->rs, X86_ESI);
1170 if (mono_use_linear_scan) {
1171 mono_linear_scan (cfg, &ls_used_mask);
1172 cfg->rs->used_mask |= ls_used_mask;
1175 if (mono_jit_dump_forest) {
1177 printf ("FOREST %s\n", mono_method_full_name (method, TRUE));
1178 for (i = 0; i < cfg->block_count; i++) {
1179 printf ("BLOCK %d:\n", i);
1180 mono_print_forest (cfg, cfg->bblocks [i].forest);
1184 if (!mono_label_cfg (cfg))
1187 arch_allocate_regs (cfg);
1189 /* align to 8 byte boundary */
1190 cfg->locals_size += 7;
1191 cfg->locals_size &= ~7;
1193 arch_emit_prologue (cfg);
1194 cfg->prologue_end = cfg->code - cfg->start;
1195 mono_emit_cfg (cfg);
1196 arch_emit_epilogue (cfg);
1197 cfg->epilogue_end = cfg->code - cfg->start;
1199 mono_compute_branches (cfg);
1201 ji->code_size = cfg->code - cfg->start;
1202 ji->used_regs = cfg->rs->used_mask;
1203 ji->method = method;
1204 ji->code_start = cfg->start;