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 * arch_get_argument_info:
114 * @csig: a method signature
115 * @param_count: the number of parameters to consider
116 * @arg_info: an array to store the result infos
118 * Gathers information on parameters such as size, alignment and
119 * padding. arg_info should be large enought to hold param_count + 1 entries.
121 * Returns the size of the activation frame.
124 arch_get_argument_info (MonoMethodSignature *csig, int param_count, MonoJitArgumentInfo *arg_info)
126 int k, frame_size = 0;
127 int size, align, pad;
130 frame_size += sizeof (gpointer);
132 if (MONO_TYPE_ISSTRUCT (csig->ret))
133 frame_size += sizeof (gpointer);
135 arg_info [0].size = frame_size;
137 for (k = 0; k < param_count; k++) {
140 size = mono_type_native_stack_size (csig->params [k], &align);
142 size = mono_type_stack_size (csig->params [k], &align);
144 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
145 arg_info [k].pad = pad;
147 arg_info [k + 1].pad = 0;
148 arg_info [k + 1].size = size;
151 align = MONO_FRAME_ALIGNMENT;
152 frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1);
153 arg_info [k].pad = pad;
159 enter_method (MonoMethod *method, char *ebp)
166 fname = mono_method_full_name (method, TRUE);
167 printf ("ENTER: %s\n(", fname);
170 if (((int)ebp & (MONO_FRAME_ALIGNMENT - 1)) != 0) {
171 g_error ("unaligned stack detected (%p)", ebp);
176 if (MONO_TYPE_ISSTRUCT (method->signature->ret)) {
177 g_assert (!method->signature->ret->byref);
179 printf ("VALUERET:%p, ", *((gpointer *)ebp));
180 ebp += sizeof (gpointer);
183 if (method->signature->hasthis) {
184 if (method->klass->valuetype) {
185 printf ("value:%p, ", *((gpointer *)ebp));
187 o = *((MonoObject **)ebp);
190 class = o->vtable->klass;
192 if (class == mono_defaults.string_class) {
193 printf ("this:[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
195 printf ("this:%p[%s.%s], ", o, class->name_space, class->name);
198 printf ("this:NULL, ");
200 ebp += sizeof (gpointer);
203 for (i = 0; i < method->signature->param_count; ++i) {
205 MonoType *type = method->signature->params [i];
207 if (method->signature->pinvoke)
208 size = mono_type_native_stack_size (type, &align);
210 size = mono_type_stack_size (type, &align);
213 printf ("[BYREF:%p], ", *((gpointer *)ebp));
214 } else switch (type->type) {
216 case MONO_TYPE_BOOLEAN:
226 printf ("%d, ", *((int *)(ebp)));
228 case MONO_TYPE_STRING: {
229 MonoString *s = *((MonoString **)ebp);
231 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
232 printf ("[STRING:%p:%s], ", s, mono_string_to_utf8 (s));
234 printf ("[STRING:null], ");
237 case MONO_TYPE_CLASS:
238 case MONO_TYPE_OBJECT: {
239 o = *((MonoObject **)ebp);
241 class = o->vtable->klass;
243 if (class == mono_defaults.string_class) {
244 printf ("[STRING:%p:%s], ", o, mono_string_to_utf8 ((MonoString *)o));
245 } else if (class == mono_defaults.int32_class) {
246 printf ("[INT32:%p:%d], ", o, *(gint32 *)((char *)o + sizeof (MonoObject)));
248 printf ("[%s.%s:%p], ", class->name_space, class->name, o);
250 printf ("%p, ", *((gpointer *)(ebp)));
255 case MONO_TYPE_FNPTR:
256 case MONO_TYPE_ARRAY:
257 case MONO_TYPE_SZARRAY:
258 printf ("%p, ", *((gpointer *)(ebp)));
261 printf ("%lld, ", *((gint64 *)(ebp)));
264 printf ("%f, ", *((float *)(ebp)));
267 printf ("%f, ", *((double *)(ebp)));
269 case MONO_TYPE_VALUETYPE:
271 for (j = 0; j < size; j++)
272 printf ("%02x,", *((guint8*)ebp +j));
279 g_assert (align == 4 || align == 8);
280 ebp += size + align - 1;
281 ebp = (gpointer)((unsigned)ebp & ~(align - 1));
288 leave_method (MonoMethod *method, int edx, int eax, double test)
293 fname = mono_method_full_name (method, TRUE);
294 printf ("LEAVE: %s", fname);
297 switch (method->signature->ret->type) {
300 case MONO_TYPE_BOOLEAN:
302 printf ("TRUE:%d", eax);
316 printf ("EAX=%d", eax);
318 case MONO_TYPE_STRING: {
319 MonoString *s = (MonoString *)eax;
322 g_assert (((MonoObject *)s)->vtable->klass == mono_defaults.string_class);
323 printf ("[STRING:%p:%s]", s, mono_string_to_utf8 (s));
325 printf ("[STRING:null], ");
328 case MONO_TYPE_OBJECT: {
329 MonoObject *o = (MonoObject *)eax;
332 if (o->vtable->klass == mono_defaults.boolean_class) {
333 printf ("[BOOLEAN:%p:%d]", o, *((guint8 *)o + sizeof (MonoObject)));
334 } else if (o->vtable->klass == mono_defaults.int32_class) {
335 printf ("[INT32:%p:%d]", o, *((gint32 *)((char *)o + sizeof (MonoObject))));
336 } else if (o->vtable->klass == mono_defaults.int64_class) {
337 printf ("[INT64:%p:%lld]", o, *((gint64 *)((char *)o + sizeof (MonoObject))));
339 printf ("[%s.%s:%p]", o->vtable->klass->name_space, o->vtable->klass->name, o);
341 printf ("[OBJECT:%p]", o);
345 case MONO_TYPE_CLASS:
347 case MONO_TYPE_FNPTR:
348 case MONO_TYPE_ARRAY:
349 case MONO_TYPE_SZARRAY:
350 printf ("EAX=%p", (gpointer)eax);
353 *((gint32 *)&l) = eax;
354 *((gint32 *)&l + 1) = edx;
355 printf ("EAX/EDX=%lld", l);
358 printf ("FP=%f\n", test);
361 printf ("(unknown return type)");
368 * arch_emit_prologue:
369 * @cfg: pointer to status information
371 * Emits the function prolog.
374 arch_emit_prologue (MonoFlowGraph *cfg)
376 MonoMethod *method = cfg->method;
377 MonoMethodHeader *header = ((MonoMethodNormal *)method)->header;
378 int i, j, k, alloc_size, pos;
380 x86_push_reg (cfg->code, X86_EBP);
381 x86_mov_reg_reg (cfg->code, X86_EBP, X86_ESP, 4);
383 alloc_size = cfg->locals_size;
386 if (method->save_lmf) {
388 pos += sizeof (MonoLMF);
390 /* save the current IP */
391 cfg->lmfip_offset = cfg->code + 1 - cfg->start;
392 x86_push_imm (cfg->code, 0);
393 /* save all caller saved regs */
394 x86_push_reg (cfg->code, X86_EBX);
395 x86_push_reg (cfg->code, X86_EDI);
396 x86_push_reg (cfg->code, X86_ESI);
397 x86_push_reg (cfg->code, X86_EBP);
399 /* save method info */
400 x86_push_imm (cfg->code, method);
402 /* get the address of lmf for the current thread */
403 x86_call_code (cfg->code, mono_get_lmf_addr);
405 x86_push_reg (cfg->code, X86_EAX);
406 /* push *lfm (previous_lmf) */
407 x86_push_membase (cfg->code, X86_EAX, 0);
409 x86_mov_membase_reg (cfg->code, X86_EAX, 0, X86_ESP, 4);
413 /* activation frame alignment check */
414 x86_mov_reg_reg (cfg->code, X86_EAX, X86_ESP, 4);
415 x86_alu_reg_imm (cfg->code, X86_AND, X86_EAX, MONO_FRAME_ALIGNMENT - 1);
416 x86_alu_reg_imm (cfg->code, X86_CMP, X86_EAX, 0);
417 x86_branch32 (cfg->code, X86_CC_EQ, 1, FALSE);
418 x86_breakpoint (cfg->code);
422 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
423 x86_push_reg (cfg->code, X86_EBX);
427 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
428 x86_push_reg (cfg->code, X86_EDI);
432 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
433 x86_push_reg (cfg->code, X86_ESI);
440 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, alloc_size);
442 if (mono_jit_trace_calls) {
443 x86_push_reg (cfg->code, X86_EBP);
444 x86_push_imm (cfg->code, cfg->method);
445 x86_mov_reg_imm (cfg->code, X86_EAX, enter_method);
446 x86_call_reg (cfg->code, X86_EAX);
447 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
449 if (mono_jit_profile) {
450 x86_push_imm (cfg->code, cfg->method);
451 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_enter);
452 x86_call_reg (cfg->code, X86_EAX);
453 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
456 /* initialize local vars */
457 if (header->num_locals) {
458 gboolean unassigned_locals = TRUE;
460 if (cfg->bblocks [0].live_in_set) {
461 i = mono_bitset_find_first (cfg->bblocks [0].live_in_set,
462 cfg->locals_start_index - 1);
463 unassigned_locals = (i >= 0 && i < cfg->locals_start_index +
467 if (unassigned_locals && header->init_locals) {
468 MonoVarInfo *vi = &VARINFO (cfg, cfg->locals_start_index + header->num_locals - 1);
469 int offset = vi->offset;
473 /* do not clear caller saved registers */
476 for (i = 0; i < header->num_locals; ++i) {
477 MonoVarInfo *rv = &VARINFO (cfg, cfg->locals_start_index + i);
480 int ind = 1 << rv->reg;
482 x86_alu_reg_reg (cfg->code, X86_XOR, rv->reg, rv->reg);
487 if (size == 1 || size == 2 || size == 4) {
488 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, size);
496 for (k = 0; k < i; k++) {
497 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
502 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
506 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 1);
511 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
512 x86_push_reg (cfg->code, X86_EDI);
513 x86_lea_membase (cfg->code, X86_EDI, X86_EBP, offset);
514 x86_alu_reg_reg (cfg->code, X86_XOR, X86_EAX, X86_EAX);
515 x86_mov_reg_imm (cfg->code, X86_ECX, i);
517 x86_prefix (cfg->code, X86_REP_PREFIX);
518 x86_stosl (cfg->code);
519 for (i = 0; i < j; i++)
520 x86_stosb (cfg->code);
521 if (!mono_regset_reg_used (cfg->rs, X86_EDI))
522 x86_pop_reg (cfg->code, X86_EDI);
526 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 2);
527 x86_mov_membase_imm (cfg->code, X86_EBP, offset + 2, 0, 1);
532 /* we always need to initialize object pointers */
534 for (i = 0; i < header->num_locals; ++i) {
535 MonoType *t = header->locals [i];
536 int offset = VARINFO (cfg, cfg->locals_start_index + i).offset;
539 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
544 case MONO_TYPE_STRING:
545 case MONO_TYPE_CLASS:
546 case MONO_TYPE_ARRAY:
547 case MONO_TYPE_SZARRAY:
548 case MONO_TYPE_OBJECT:
549 x86_mov_membase_imm (cfg->code, X86_EBP, offset, 0, 4);
559 * arch_emit_epilogue:
560 * @cfg: pointer to status information
562 * Emits the function epilog.
565 arch_emit_epilogue (MonoFlowGraph *cfg)
569 * note: with trace and profiling the value on the FP stack may get clobbered.
571 if (mono_jit_trace_calls) {
572 x86_fld_reg (cfg->code, 0);
573 x86_alu_reg_imm (cfg->code, X86_SUB, X86_ESP, 8);
574 x86_fst_membase (cfg->code, X86_ESP, 0, TRUE, TRUE);
575 x86_push_reg (cfg->code, X86_EAX);
576 x86_push_reg (cfg->code, X86_EDX);
577 x86_push_imm (cfg->code, cfg->method);
578 x86_mov_reg_imm (cfg->code, X86_EAX, leave_method);
579 x86_call_reg (cfg->code, X86_EAX);
580 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
581 x86_pop_reg (cfg->code, X86_EDX);
582 x86_pop_reg (cfg->code, X86_EAX);
583 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 8);
585 if (mono_jit_profile) {
586 x86_push_reg (cfg->code, X86_EAX);
587 x86_push_reg (cfg->code, X86_EDX);
588 x86_push_imm (cfg->code, cfg->method);
589 x86_mov_reg_imm (cfg->code, X86_EAX, mono_profiler_method_leave);
590 x86_call_reg (cfg->code, X86_EAX);
591 x86_alu_reg_imm (cfg->code, X86_ADD, X86_ESP, 4);
592 x86_pop_reg (cfg->code, X86_EDX);
593 x86_pop_reg (cfg->code, X86_EAX);
596 if (cfg->method->save_lmf) {
597 pos = -sizeof (MonoLMF) - 4;
601 if (mono_regset_reg_used (cfg->rs, X86_EBX)) {
602 x86_mov_reg_membase (cfg->code, X86_EBX, X86_EBP, pos, 4);
605 if (mono_regset_reg_used (cfg->rs, X86_EDI)) {
606 x86_mov_reg_membase (cfg->code, X86_EDI, X86_EBP, pos, 4);
609 if (mono_regset_reg_used (cfg->rs, X86_ESI)) {
610 x86_mov_reg_membase (cfg->code, X86_ESI, X86_EBP, pos, 4);
614 if (cfg->method->save_lmf) {
615 pos = -sizeof (MonoLMF);
617 x86_lea_membase (cfg->code, X86_ESP, X86_EBP, pos);
619 /* ebx = previous_lmf */
620 x86_pop_reg (cfg->code, X86_EBX);
622 x86_pop_reg (cfg->code, X86_EDI);
623 /* *(lmf) = previous_lmf */
624 x86_mov_membase_reg (cfg->code, X86_EDI, 0, X86_EBX, 4);
626 /* discard method info */
627 x86_pop_reg (cfg->code, X86_ESI);
629 /* restore caller saved regs */
630 x86_pop_reg (cfg->code, X86_EBP);
631 x86_pop_reg (cfg->code, X86_ESI);
632 x86_pop_reg (cfg->code, X86_EDI);
633 x86_pop_reg (cfg->code, X86_EBX);
637 x86_leave (cfg->code);
642 arch_allocate_var (MonoFlowGraph *cfg, int size, int align, MonoVarType vartype, MonoValueType type)
646 mono_jit_stats.allocate_var++;
648 vi.range.last_use.abs_pos = 0;
649 vi.range.first_use.pos.bid = 0xffff;
650 vi.range.first_use.pos.tid = 0;
653 vi.varnum = cfg->varinfo->len;
655 if (size != sizeof (gpointer))
660 case MONO_LOCALVAR: {
661 cfg->locals_size += size;
662 cfg->locals_size += align - 1;
663 cfg->locals_size &= ~(align - 1);
665 SET_VARINFO (vi, type, vartype, - cfg->locals_size, size);
666 g_array_append_val (cfg->varinfo, vi);
670 int arg_start = 8 + cfg->has_vtarg*4;
672 g_assert ((align & 3) == 0);
674 SET_VARINFO (vi, type, vartype, cfg->args_size + arg_start, size);
675 g_array_append_val (cfg->varinfo, vi);
677 cfg->args_size += size;
679 cfg->args_size &= ~3;
683 g_assert_not_reached ();
686 return cfg->varinfo->len - 1;
690 mono_label_cfg (MonoFlowGraph *cfg)
694 for (i = 0; i < cfg->block_count; i++) {
695 GPtrArray *forest = cfg->bblocks [i].forest;
698 if (!cfg->bblocks [i].reached) /* unreachable code */
703 for (j = 0; j < top; j++) {
704 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
707 mbstate = mono_burg_label (t1, cfg);
710 if (mono_debug_format != MONO_DEBUG_FORMAT_NONE)
712 g_warning ("tree does not match in %s: 0x%04x",
713 mono_method_full_name (cfg->method, TRUE), t1->cli_addr);
714 mono_print_ctree (cfg, t1); printf ("\n\n");
716 mono_print_forest (cfg, forest);
717 g_assert_not_reached ();
726 tree_allocate_regs (MonoFlowGraph *cfg, MBTree *tree, int goal, MonoRegSet *rs,
727 guint8 exclude_mask, int *spillcount)
730 int ern = mono_burg_rule (tree->state, goal);
731 const guint16 *nts = mono_burg_nts [ern];
732 guint8 left_exclude_mask = 0, right_exclude_mask = 0;
735 #ifdef DEBUG_REGALLOC
736 printf ("tree_allocate_regs start %d %08x %d %d\n", tree->op, rs->free_mask, goal,
737 (nts [0] && kids [0] == tree));
740 mono_burg_kids (tree, ern, kids);
746 exclude_mask |= (1 << X86_ECX);
747 left_exclude_mask |= (1 << X86_ECX);
750 case MB_TERM_MUL_OVF:
751 case MB_TERM_MUL_OVF_UN:
756 if (goal == MB_NTERM_reg) {
757 left_exclude_mask |= (1 << X86_EDX);
758 right_exclude_mask |= (1 << X86_EDX) | (1 << X86_EAX);
765 if (nts [0] && kids [0] == tree) {
767 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, exclude_mask, spillcount))
788 if (nts [1]) { /* two kids */
791 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
796 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
798 #ifdef DEBUG_REGALLOC
799 printf ("tree_allocate_regs try 1 failed %d %d %d %d\n",
800 nts [1], kids [1]->reg1,
801 kids [1]->reg2,kids [1]->reg3);
805 if (kids [0]->reg1 != -1) {
806 right_exclude_mask |= 1 << kids [0]->reg1;
809 if (kids [0]->reg2 != -1) {
810 right_exclude_mask |= 1 << kids [0]->reg2;
813 if (kids [0]->reg3 != -1) {
814 right_exclude_mask |= 1 << kids [0]->reg3;
818 mono_regset_free_reg (rs, kids [0]->reg1);
819 mono_regset_free_reg (rs, kids [0]->reg2);
820 mono_regset_free_reg (rs, kids [0]->reg3);
822 kids [0]->spilled = 1;
824 if (!tree_allocate_regs (cfg, kids [1], nts [1], rs, right_exclude_mask, spillcount)) {
825 #ifdef DEBUG_REGALLOC
826 printf ("tree_allocate_regs try 2 failed\n");
830 #ifdef DEBUG_REGALLOC
831 printf ("tree_allocate_regs try 2 succesfull\n");
836 if (nts [3]) /* we cant handle four kids */
837 g_assert_not_reached ();
839 if (!tree_allocate_regs (cfg, kids [2], nts [2], rs, right_exclude_mask, spillcount))
844 } else { /* one kid */
845 if (!tree_allocate_regs (cfg, kids [0], nts [0], rs, left_exclude_mask, spillcount))
851 for (i = 0; nts [i]; i++) {
852 mono_regset_free_reg (rs, kids [i]->reg1);
853 mono_regset_free_reg (rs, kids [i]->reg2);
854 mono_regset_free_reg (rs, kids [i]->reg3);
857 tree->emit = mono_burg_func [ern];
860 case MB_TERM_CALL_I4:
861 case MB_TERM_CALL_I8:
862 case MB_TERM_CALL_R8:
863 // case MB_TERM_CALL_VOID :
864 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
866 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
868 if ((tree->reg3 = mono_regset_alloc_reg (rs, X86_ECX, exclude_mask)) == -1)
876 case MB_TERM_MUL_OVF_UN:
881 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
883 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
887 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
895 case MB_TERM_MUL_OVF:
896 case MB_TERM_MUL_OVF_UN:
901 if ((tree->reg1 = mono_regset_alloc_reg (rs, X86_EAX, exclude_mask)) == -1)
903 if ((tree->reg2 = mono_regset_alloc_reg (rs, X86_EDX, exclude_mask)) == -1)
907 if ((tree->reg1 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
909 if ((tree->reg2 = mono_regset_alloc_reg (rs, -1, exclude_mask)) == -1)
915 /* fixme: allocate floating point registers */
919 if (tree->op == MB_TERM_ADD) {
920 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
922 if ((tree->reg2 = mono_regset_alloc_reg (rs, tree->right->reg1, exclude_mask)) == -1)
928 if (tree->op == MB_TERM_ADD) {
929 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
935 if (tree->op == MB_TERM_SHL ||
936 tree->op == MB_TERM_MUL) {
937 if ((tree->reg1 = mono_regset_alloc_reg (rs, tree->left->reg1, exclude_mask)) == -1)
947 #ifdef DEBUG_REGALLOC
948 printf ("tree_allocate_regs end %d %08x\n", tree->op, rs->free_mask);
954 arch_allocate_regs (MonoFlowGraph *cfg)
956 int i, j, max_spillcount = 0;
958 for (i = 0; i < cfg->block_count; i++) {
959 GPtrArray *forest = cfg->bblocks [i].forest;
962 if (!cfg->bblocks [i].reached) /* unreachable code */
967 for (j = 0; j < top; j++) {
968 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
970 #ifdef DEBUG_REGALLOC
971 printf ("arch_allocate_regs start %d:%d %08x\n", i, j, cfg->rs->free_mask);
973 if (!tree_allocate_regs (cfg, t1, 1, cfg->rs, 0, &spillcount)) {
974 mono_print_ctree (cfg, t1);
976 g_error ("register allocation failed");
979 max_spillcount = MAX (max_spillcount, spillcount);
981 #ifdef DEBUG_REGALLOC
982 printf ("arch_allocate_regs end %d:%d %08x\n", i, j, cfg->rs->free_mask);
984 g_assert (cfg->rs->free_mask == 0xffffffff);
988 /* allocate space for spilled regs */
990 cfg->spillvars = mono_mempool_alloc0 (cfg->mp, sizeof (gint) * max_spillcount);
991 cfg->spillcount = max_spillcount;
993 for (i = 0; i < max_spillcount; i++) {
995 spillvar = arch_allocate_var (cfg, sizeof (gpointer), sizeof (gpointer),
996 MONO_TEMPVAR, VAL_I32);
997 cfg->spillvars [i] = VARINFO (cfg, spillvar).offset;
1002 tree_emit (int goal, MonoFlowGraph *cfg, MBTree *tree, int *spillcount)
1005 int ern = mono_burg_rule (tree->state, goal);
1006 const guint16 *nts = mono_burg_nts [ern];
1010 mono_burg_kids (tree, ern, kids);
1014 int spilloffset1, spilloffset2, spilloffset3;
1016 tree_emit (nts [0], cfg, kids [0], spillcount);
1018 if (kids [0]->spilled) {
1020 printf ("SPILL_REGS %d %03x %s.%s:%s\n",
1021 nts [0], cfg->code - cfg->start,
1022 cfg->method->klass->name_space,
1023 cfg->method->klass->name, cfg->method->name);
1025 mono_print_ctree (cfg, kids [0]);printf ("\n\n");
1031 if (kids [0]->reg1 != -1) {
1032 spilloffset1 = cfg->spillvars [(*spillcount)++];
1033 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset1,
1036 if (kids [0]->reg2 != -1) {
1037 spilloffset2 = cfg->spillvars [(*spillcount)++];
1038 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset2,
1041 if (kids [0]->reg3 != -1) {
1042 spilloffset3 = cfg->spillvars [(*spillcount)++];
1043 x86_mov_membase_reg (cfg->code, X86_EBP, spilloffset3,
1048 tree_emit (nts [1], cfg, kids [1], spillcount);
1050 if (kids [0]->spilled) {
1053 printf ("RELOAD_REGS %03x %s.%s:%s\n",
1054 cfg->code - cfg->start,
1055 cfg->method->klass->name_space,
1056 cfg->method->klass->name, cfg->method->name);
1059 if (kids [0]->reg3 != -1)
1060 x86_mov_reg_membase (cfg->code, kids [0]->reg3, X86_EBP,
1062 if (kids [0]->reg2 != -1)
1063 x86_mov_reg_membase (cfg->code, kids [0]->reg2, X86_EBP,
1065 if (kids [0]->reg1 != -1)
1066 x86_mov_reg_membase (cfg->code, kids [0]->reg1, X86_EBP,
1071 g_assert (!nts [3]);
1072 tree_emit (nts [2], cfg, kids [2], spillcount);
1075 tree_emit (nts [0], cfg, kids [0], spillcount);
1079 g_assert ((*spillcount) <= cfg->spillcount);
1081 tree->addr = offset = cfg->code - cfg->start;
1083 /* we assume an instruction uses a maximum of 128 bytes */
1084 if ((cfg->code_size - offset) <= 128) {
1085 int add = MIN (cfg->code_size, 128);
1086 cfg->code_size += add;
1087 mono_jit_stats.code_reallocs++;
1088 cfg->start = g_realloc (cfg->start, cfg->code_size);
1089 g_assert (cfg->start);
1090 cfg->code = cfg->start + offset;
1093 if ((emit = mono_burg_func [ern]))
1096 g_assert ((cfg->code - cfg->start) < cfg->code_size);
1100 mono_emit_cfg (MonoFlowGraph *cfg)
1102 int i, j, spillcount;
1104 for (i = 0; i < cfg->block_count; i++) {
1105 MonoBBlock *bb = &cfg->bblocks [i];
1106 GPtrArray *forest = bb->forest;
1109 if (!bb->reached) /* unreachable code */
1114 bb->addr = cfg->code - cfg->start;
1116 for (j = 0; j < top; j++) {
1117 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, j);
1120 tree_emit (1, cfg, t1, &spillcount);
1124 cfg->epilog = cfg->code - cfg->start;
1128 mono_compute_branches (MonoFlowGraph *cfg)
1136 for (j = 0; j < cfg->block_count; j++) {
1137 MonoBBlock *bb = &cfg->bblocks [j];
1138 GPtrArray *forest = bb->forest;
1141 if (!bb->reached) /* unreachable code */
1146 for (i = 0; i < top; i++) {
1147 MBTree *t1 = (MBTree *) g_ptr_array_index (forest, i);
1149 if (t1->op == MB_TERM_SWITCH) {
1150 MonoBBlock **jt = (MonoBBlock **)t1->data.p;
1151 guint32 *rt = (guint32 *)t1->data.p;
1152 int m = *((guint32 *)t1->data.p) + 1;
1155 for (k = 1; k <= m; k++)
1156 rt [k] = (int)(jt [k]->addr + cfg->start);
1158 /* emit the switch instruction again to update addresses */
1159 cfg->code = cfg->start + t1->addr;
1160 ((MBEmitFunc)t1->emit) (t1, cfg);
1167 for (ji = cfg->jump_info; ji; ji = ji->next) {
1168 unsigned char *ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ji->ip) + cfg->start);
1169 unsigned char *target;
1172 case MONO_JUMP_INFO_BB:
1173 target = ji->data.bb->addr + cfg->start;
1175 case MONO_JUMP_INFO_ABS:
1176 target = ji->data.target;
1178 case MONO_JUMP_INFO_EPILOG:
1179 target = cfg->epilog + cfg->start;
1181 case MONO_JUMP_INFO_IP:
1182 *(unsigned char**)ip = ip;
1185 g_assert_not_reached ();
1187 x86_patch (ip, target);
1190 /* patch the IP in the LMF saving code */
1191 if (cfg->lmfip_offset) {
1192 *((guint32 *)(cfg->start + cfg->lmfip_offset)) =
1193 (gint32)(cfg->start + cfg->lmfip_offset);
1198 mono_add_jump_info (MonoFlowGraph *cfg, gpointer ip, MonoJumpInfoType type, gpointer target)
1200 MonoJumpInfo *ji = mono_mempool_alloc (cfg->mp, sizeof (MonoJumpInfo));
1203 ji->ip = GUINT_TO_POINTER (GPOINTER_TO_UINT (ip) - GPOINTER_TO_UINT (cfg->start));
1204 ji->data.target = target;
1205 ji->next = cfg->jump_info;
1207 cfg->jump_info = ji;
1211 arch_jit_compile_cfg (MonoDomain *target_domain, MonoFlowGraph *cfg)
1214 guint32 ls_used_mask = 0;
1215 MonoMethod *method = cfg->method;
1217 ji = mono_mempool_alloc0 (target_domain->mp, sizeof (MonoJitInfo));
1219 cfg->rs = mono_regset_new (X86_NREG);
1220 mono_regset_reserve_reg (cfg->rs, X86_ESP);
1221 mono_regset_reserve_reg (cfg->rs, X86_EBP);
1223 /* we can use this regs for global register allocation */
1224 mono_regset_reserve_reg (cfg->rs, X86_EBX);
1225 mono_regset_reserve_reg (cfg->rs, X86_ESI);
1227 if (mono_use_linear_scan) {
1228 mono_linear_scan (cfg, &ls_used_mask);
1229 cfg->rs->used_mask |= ls_used_mask;
1232 if (mono_jit_dump_forest) {
1234 printf ("FOREST %s\n", mono_method_full_name (method, TRUE));
1235 for (i = 0; i < cfg->block_count; i++) {
1236 printf ("BLOCK %d:\n", i);
1237 mono_print_forest (cfg, cfg->bblocks [i].forest);
1241 if (!mono_label_cfg (cfg))
1244 arch_allocate_regs (cfg);
1246 /* align to 8 byte boundary */
1247 cfg->locals_size += 7;
1248 cfg->locals_size &= ~7;
1250 arch_emit_prologue (cfg);
1251 cfg->prologue_end = cfg->code - cfg->start;
1252 mono_emit_cfg (cfg);
1253 arch_emit_epilogue (cfg);
1254 cfg->epilogue_end = cfg->code - cfg->start;
1256 mono_compute_branches (cfg);
1258 ji->code_size = cfg->code - cfg->start;
1259 ji->used_regs = cfg->rs->used_mask;
1260 ji->method = method;
1261 ji->code_start = cfg->start;