2 * mini-codegen.c: Arch independent code generation functionality
4 * (C) 2003 Ximian, Inc.
13 #include <mono/metadata/appdomain.h>
14 #include <mono/metadata/debug-helpers.h>
15 #include <mono/metadata/threads.h>
16 #include <mono/metadata/profiler-private.h>
17 #include <mono/metadata/mempool-internals.h>
18 #include <mono/utils/mono-math.h>
22 #include "mini-arch.h"
24 #ifndef MONO_MAX_XREGS
26 #define MONO_MAX_XREGS 0
27 #define MONO_ARCH_CALLEE_SAVED_XREGS 0
28 #define MONO_ARCH_CALLEE_XREGS 0
33 #define MONO_ARCH_BANK_MIRRORED -2
35 #ifdef MONO_ARCH_USE_SHARED_FP_SIMD_BANK
37 #ifndef MONO_ARCH_NEED_SIMD_BANK
38 #error "MONO_ARCH_USE_SHARED_FP_SIMD_BANK needs MONO_ARCH_NEED_SIMD_BANK to work"
41 #define get_mirrored_bank(bank) (((bank) == MONO_REG_SIMD ) ? MONO_REG_DOUBLE : (((bank) == MONO_REG_DOUBLE ) ? MONO_REG_SIMD : -1))
43 #define is_hreg_mirrored(rs, bank, hreg) ((rs)->symbolic [(bank)] [(hreg)] == MONO_ARCH_BANK_MIRRORED)
49 #define get_mirrored_bank(bank) (-1)
51 #define is_hreg_mirrored(rs, bank, hreg) (0)
56 /* If the bank is mirrored return the true logical bank that the register in the
57 * physical register bank is allocated to.
59 static inline int translate_bank (MonoRegState *rs, int bank, int hreg) {
60 return is_hreg_mirrored (rs, bank, hreg) ? get_mirrored_bank (bank) : bank;
64 * Every hardware register belongs to a register type or register bank. bank 0
65 * contains the int registers, bank 1 contains the fp registers.
66 * int registers are used 99% of the time, so they are special cased in a lot of
70 static const int regbank_size [] = {
78 static const int regbank_load_ops [] = {
86 static const int regbank_store_ops [] = {
87 OP_STORER_MEMBASE_REG,
88 OP_STORER8_MEMBASE_REG,
89 OP_STORER_MEMBASE_REG,
90 OP_STORER_MEMBASE_REG,
94 static const int regbank_move_ops [] = {
102 #define regmask(reg) (((regmask_t)1) << (reg))
104 #ifdef MONO_ARCH_USE_SHARED_FP_SIMD_BANK
105 static const regmask_t regbank_callee_saved_regs [] = {
106 MONO_ARCH_CALLEE_SAVED_REGS,
107 MONO_ARCH_CALLEE_SAVED_FREGS,
108 MONO_ARCH_CALLEE_SAVED_REGS,
109 MONO_ARCH_CALLEE_SAVED_REGS,
110 MONO_ARCH_CALLEE_SAVED_XREGS,
114 static const regmask_t regbank_callee_regs [] = {
115 MONO_ARCH_CALLEE_REGS,
116 MONO_ARCH_CALLEE_FREGS,
117 MONO_ARCH_CALLEE_REGS,
118 MONO_ARCH_CALLEE_REGS,
119 MONO_ARCH_CALLEE_XREGS,
122 static const int regbank_spill_var_size[] = {
127 16 /*FIXME make this a constant. Maybe MONO_ARCH_SIMD_VECTOR_SIZE? */
130 #define DEBUG(a) MINI_DEBUG(cfg->verbose_level, 3, a;)
133 mono_regstate_assign (MonoRegState *rs)
135 #ifdef MONO_ARCH_USE_SHARED_FP_SIMD_BANK
136 /* The regalloc may fail if fp and simd logical regbanks share the same physical reg bank and
137 * if the values here are not the same.
139 g_assert(regbank_callee_regs [MONO_REG_SIMD] == regbank_callee_regs [MONO_REG_DOUBLE]);
140 g_assert(regbank_callee_saved_regs [MONO_REG_SIMD] == regbank_callee_saved_regs [MONO_REG_DOUBLE]);
141 g_assert(regbank_size [MONO_REG_SIMD] == regbank_size [MONO_REG_DOUBLE]);
144 if (rs->next_vreg > rs->vassign_size) {
145 g_free (rs->vassign);
146 rs->vassign_size = MAX (rs->next_vreg, 256);
147 rs->vassign = g_malloc (rs->vassign_size * sizeof (gint32));
150 memset (rs->isymbolic, 0, MONO_MAX_IREGS * sizeof (rs->isymbolic [0]));
151 memset (rs->fsymbolic, 0, MONO_MAX_FREGS * sizeof (rs->fsymbolic [0]));
153 rs->symbolic [MONO_REG_INT] = rs->isymbolic;
154 rs->symbolic [MONO_REG_DOUBLE] = rs->fsymbolic;
156 #ifdef MONO_ARCH_NEED_SIMD_BANK
157 memset (rs->xsymbolic, 0, MONO_MAX_XREGS * sizeof (rs->xsymbolic [0]));
158 rs->symbolic [MONO_REG_SIMD] = rs->xsymbolic;
163 mono_regstate_alloc_int (MonoRegState *rs, regmask_t allow)
165 regmask_t mask = allow & rs->ifree_mask;
167 #if defined(__x86_64__) && defined(__GNUC__)
174 __asm__("bsfq %1,%0\n\t"
175 : "=r" (i) : "rm" (mask));
177 rs->ifree_mask &= ~ ((regmask_t)1 << i);
183 for (i = 0; i < MONO_MAX_IREGS; ++i) {
184 if (mask & ((regmask_t)1 << i)) {
185 rs->ifree_mask &= ~ ((regmask_t)1 << i);
194 mono_regstate_free_int (MonoRegState *rs, int reg)
197 rs->ifree_mask |= (regmask_t)1 << reg;
198 rs->isymbolic [reg] = 0;
203 mono_regstate_alloc_general (MonoRegState *rs, regmask_t allow, int bank)
207 regmask_t mask = allow & rs->free_mask [bank];
208 for (i = 0; i < regbank_size [bank]; ++i) {
209 if (mask & ((regmask_t)1 << i)) {
210 rs->free_mask [bank] &= ~ ((regmask_t)1 << i);
212 mirrored_bank = get_mirrored_bank (bank);
213 if (mirrored_bank == -1)
216 rs->free_mask [mirrored_bank] = rs->free_mask [bank];
224 mono_regstate_free_general (MonoRegState *rs, int reg, int bank)
229 rs->free_mask [bank] |= (regmask_t)1 << reg;
230 rs->symbolic [bank][reg] = 0;
232 mirrored_bank = get_mirrored_bank (bank);
233 if (mirrored_bank == -1)
235 rs->free_mask [mirrored_bank] = rs->free_mask [bank];
236 rs->symbolic [mirrored_bank][reg] = 0;
241 mono_regname_full (int reg, int bank)
243 if (G_UNLIKELY (bank)) {
244 #if MONO_ARCH_NEED_SIMD_BANK
245 if (bank == MONO_REG_SIMD)
246 return mono_arch_xregname (reg);
248 if (bank == MONO_REG_INT_REF || bank == MONO_REG_INT_MP)
249 return mono_arch_regname (reg);
250 g_assert (bank == MONO_REG_DOUBLE);
251 return mono_arch_fregname (reg);
253 return mono_arch_regname (reg);
258 mono_call_inst_add_outarg_reg (MonoCompile *cfg, MonoCallInst *call, int vreg, int hreg, int bank)
262 regpair = (((guint32)hreg) << 24) + vreg;
263 if (G_UNLIKELY (bank)) {
264 g_assert (vreg >= regbank_size [bank]);
265 g_assert (hreg < regbank_size [bank]);
266 call->used_fregs |= 1 << hreg;
267 call->out_freg_args = g_slist_append_mempool (cfg->mempool, call->out_freg_args, (gpointer)(gssize)(regpair));
269 g_assert (vreg >= MONO_MAX_IREGS);
270 g_assert (hreg < MONO_MAX_IREGS);
271 call->used_iregs |= 1 << hreg;
272 call->out_ireg_args = g_slist_append_mempool (cfg->mempool, call->out_ireg_args, (gpointer)(gssize)(regpair));
277 * mono_call_inst_add_outarg_vt:
279 * Register OUTARG_VT as belonging to CALL.
282 mono_call_inst_add_outarg_vt (MonoCompile *cfg, MonoCallInst *call, MonoInst *outarg_vt)
284 call->outarg_vts = g_slist_append_mempool (cfg->mempool, call->outarg_vts, outarg_vt);
288 resize_spill_info (MonoCompile *cfg, int bank)
290 MonoSpillInfo *orig_info = cfg->spill_info [bank];
291 int orig_len = cfg->spill_info_len [bank];
292 int new_len = orig_len ? orig_len * 2 : 16;
293 MonoSpillInfo *new_info;
296 g_assert (bank < MONO_NUM_REGBANKS);
298 new_info = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoSpillInfo) * new_len);
300 memcpy (new_info, orig_info, sizeof (MonoSpillInfo) * orig_len);
301 for (i = orig_len; i < new_len; ++i)
302 new_info [i].offset = -1;
304 cfg->spill_info [bank] = new_info;
305 cfg->spill_info_len [bank] = new_len;
309 * returns the offset used by spillvar. It allocates a new
310 * spill variable if necessary.
313 mono_spillvar_offset (MonoCompile *cfg, int spillvar, int bank)
318 if (G_UNLIKELY (spillvar >= (cfg->spill_info_len [bank]))) {
319 while (spillvar >= cfg->spill_info_len [bank])
320 resize_spill_info (cfg, bank);
324 * Allocate separate spill slots for fp/non-fp variables since most processors prefer it.
326 info = &cfg->spill_info [bank][spillvar];
327 if (info->offset == -1) {
328 cfg->stack_offset += sizeof (mgreg_t) - 1;
329 cfg->stack_offset &= ~(sizeof (mgreg_t) - 1);
331 g_assert (bank < MONO_NUM_REGBANKS);
332 if (G_UNLIKELY (bank))
333 size = regbank_spill_var_size [bank];
335 size = sizeof (mgreg_t);
337 if (cfg->flags & MONO_CFG_HAS_SPILLUP) {
338 cfg->stack_offset += size - 1;
339 cfg->stack_offset &= ~(size - 1);
340 info->offset = cfg->stack_offset;
341 cfg->stack_offset += size;
343 cfg->stack_offset += size - 1;
344 cfg->stack_offset &= ~(size - 1);
345 cfg->stack_offset += size;
346 info->offset = - cfg->stack_offset;
353 #define is_hard_ireg(r) ((r) >= 0 && (r) < MONO_MAX_IREGS)
354 #define is_hard_freg(r) ((r) >= 0 && (r) < MONO_MAX_FREGS)
355 #define is_global_ireg(r) (is_hard_ireg ((r)) && (MONO_ARCH_CALLEE_SAVED_REGS & (regmask (r))))
356 #define is_local_ireg(r) (is_hard_ireg ((r)) && (MONO_ARCH_CALLEE_REGS & (regmask (r))))
357 #define is_global_freg(r) (is_hard_freg ((r)) && (MONO_ARCH_CALLEE_SAVED_FREGS & (regmask (r))))
358 #define is_local_freg(r) (is_hard_freg ((r)) && (MONO_ARCH_CALLEE_FREGS & (regmask (r))))
360 #define is_hard_reg(r,bank) (G_UNLIKELY (bank) ? ((r) >= 0 && (r) < regbank_size [bank]) : ((r) < MONO_MAX_IREGS))
361 #define is_soft_reg(r,bank) (!is_hard_reg((r),(bank)))
362 #define is_global_reg(r,bank) (G_UNLIKELY (bank) ? (is_hard_reg ((r), (bank)) && (regbank_callee_saved_regs [bank] & regmask (r))) : is_global_ireg (r))
363 #define is_local_reg(r,bank) (G_UNLIKELY (bank) ? (is_hard_reg ((r), (bank)) && (regbank_callee_regs [bank] & regmask (r))) : is_local_ireg (r))
364 #define reg_is_freeable(r,bank) (G_UNLIKELY (bank) ? is_local_reg ((r), (bank)) : is_local_ireg ((r)))
366 #ifndef MONO_ARCH_INST_IS_FLOAT
367 #define MONO_ARCH_INST_IS_FLOAT(desc) ((desc) == 'f')
370 #define reg_is_fp(desc) (MONO_ARCH_INST_IS_FLOAT (desc))
371 #define dreg_is_fp(spec) (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_DEST]))
372 #define sreg_is_fp(n,spec) (MONO_ARCH_INST_IS_FLOAT (spec [MONO_INST_SRC1+(n)]))
373 #define sreg1_is_fp(spec) sreg_is_fp (0,(spec))
374 #define sreg2_is_fp(spec) sreg_is_fp (1,(spec))
376 #define reg_is_simd(desc) ((desc) == 'x')
378 #ifdef MONO_ARCH_NEED_SIMD_BANK
380 #define reg_bank(desc) (G_UNLIKELY (reg_is_fp (desc)) ? MONO_REG_DOUBLE : G_UNLIKELY (reg_is_simd(desc)) ? MONO_REG_SIMD : MONO_REG_INT)
384 #define reg_bank(desc) reg_is_fp ((desc))
388 #define sreg_bank(n,spec) reg_bank ((spec)[MONO_INST_SRC1+(n)])
389 #define sreg1_bank(spec) sreg_bank (0, (spec))
390 #define sreg2_bank(spec) sreg_bank (1, (spec))
391 #define dreg_bank(spec) reg_bank ((spec)[MONO_INST_DEST])
393 #define sreg_bank_ins(n,ins) sreg_bank ((n), ins_get_spec ((ins)->opcode))
394 #define sreg1_bank_ins(ins) sreg_bank_ins (0, (ins))
395 #define sreg2_bank_ins(ins) sreg_bank_ins (1, (ins))
396 #define dreg_bank_ins(ins) dreg_bank (ins_get_spec ((ins)->opcode))
398 #define regpair_reg2_mask(desc,hreg1) ((MONO_ARCH_INST_REGPAIR_REG2 (desc,hreg1) != -1) ? (regmask (MONO_ARCH_INST_REGPAIR_REG2 (desc,hreg1))) : MONO_ARCH_CALLEE_REGS)
400 #ifdef MONO_ARCH_IS_GLOBAL_IREG
401 #undef is_global_ireg
402 #define is_global_ireg(reg) MONO_ARCH_IS_GLOBAL_IREG ((reg))
411 regmask_t preferred_mask; /* the hreg where the register should be allocated, or 0 */
414 #if !defined(DISABLE_LOGGING) && !defined(DISABLE_JIT)
416 static const char* const patch_info_str[] = {
417 #define PATCH_INFO(a,b) "" #a,
418 #include "patch-info.h"
423 mono_print_ji (const MonoJumpInfo *ji)
426 case MONO_PATCH_INFO_RGCTX_FETCH: {
427 MonoJumpInfoRgctxEntry *entry = ji->data.rgctx_entry;
429 printf ("[RGCTX_FETCH ");
430 mono_print_ji (entry->data);
431 printf (" - %s]", mono_rgctx_info_type_to_str (entry->info_type));
434 case MONO_PATCH_INFO_METHODCONST: {
435 char *s = mono_method_full_name (ji->data.method, TRUE);
436 printf ("[METHODCONST - %s]", s);
441 printf ("[%s]", patch_info_str [ji->type]);
447 mono_print_ins_index (int i, MonoInst *ins)
449 const char *spec = ins_get_spec (ins->opcode);
451 int sregs [MONO_MAX_SRC_REGS];
454 printf ("\t%-2d %s", i, mono_inst_name (ins->opcode));
456 printf (" %s", mono_inst_name (ins->opcode));
457 if (spec == MONO_ARCH_CPU_SPEC) {
458 gboolean dest_base = FALSE;
459 switch (ins->opcode) {
460 case OP_STOREV_MEMBASE:
467 /* This is a lowered opcode */
468 if (ins->dreg != -1) {
470 printf (" [R%d + 0x%lx] <-", ins->dreg, (long)ins->inst_offset);
472 printf (" R%d <-", ins->dreg);
474 if (ins->sreg1 != -1)
475 printf (" R%d", ins->sreg1);
476 if (ins->sreg2 != -1)
477 printf (" R%d", ins->sreg2);
478 if (ins->sreg3 != -1)
479 printf (" R%d", ins->sreg3);
481 switch (ins->opcode) {
492 if (!ins->inst_false_bb)
493 printf (" [B%d]", ins->inst_true_bb->block_num);
495 printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
502 printf (" [%d (", (int)ins->inst_c0);
503 for (i = 0; i < ins->inst_phi_args [0]; i++) {
506 printf ("R%d", ins->inst_phi_args [i + 1]);
512 case OP_OUTARG_VTRETADDR:
513 printf (" R%d", ((MonoInst*)ins->inst_p0)->dreg);
516 case OP_GSHAREDVT_ARG_REGOFFSET:
517 printf (" + 0x%lx", (long)ins->inst_offset);
524 //g_error ("Unknown opcode: %s\n", mono_inst_name (ins->opcode));
528 if (spec [MONO_INST_DEST]) {
529 int bank = dreg_bank (spec);
530 if (is_soft_reg (ins->dreg, bank)) {
531 if (spec [MONO_INST_DEST] == 'b') {
532 if (ins->inst_offset == 0)
533 printf (" [R%d] <-", ins->dreg);
535 printf (" [R%d + 0x%lx] <-", ins->dreg, (long)ins->inst_offset);
538 printf (" R%d <-", ins->dreg);
539 } else if (spec [MONO_INST_DEST] == 'b') {
540 if (ins->inst_offset == 0)
541 printf (" [%s] <-", mono_arch_regname (ins->dreg));
543 printf (" [%s + 0x%lx] <-", mono_arch_regname (ins->dreg), (long)ins->inst_offset);
545 printf (" %s <-", mono_regname_full (ins->dreg, bank));
547 if (spec [MONO_INST_SRC1]) {
548 int bank = sreg1_bank (spec);
549 if (is_soft_reg (ins->sreg1, bank)) {
550 if (spec [MONO_INST_SRC1] == 'b')
551 printf (" [R%d + 0x%lx]", ins->sreg1, (long)ins->inst_offset);
553 printf (" R%d", ins->sreg1);
554 } else if (spec [MONO_INST_SRC1] == 'b')
555 printf (" [%s + 0x%lx]", mono_arch_regname (ins->sreg1), (long)ins->inst_offset);
557 printf (" %s", mono_regname_full (ins->sreg1, bank));
559 num_sregs = mono_inst_get_src_registers (ins, sregs);
560 for (j = 1; j < num_sregs; ++j) {
561 int bank = sreg_bank (j, spec);
562 if (is_soft_reg (sregs [j], bank))
563 printf (" R%d", sregs [j]);
565 printf (" %s", mono_regname_full (sregs [j], bank));
568 switch (ins->opcode) {
570 printf (" [%d]", (int)ins->inst_c0);
572 #if defined(TARGET_X86) || defined(TARGET_AMD64)
573 case OP_X86_PUSH_IMM:
575 case OP_ICOMPARE_IMM:
583 printf (" [%d]", (int)ins->inst_imm);
587 printf (" [%d]", (int)(gssize)ins->inst_p1);
590 printf (" [%lld]", (long long)ins->inst_l);
593 printf (" [%f]", *(double*)ins->inst_p0);
596 printf (" [%f]", *(float*)ins->inst_p0);
599 case OP_CALL_MEMBASE:
605 case OP_VCALL_MEMBASE:
608 case OP_VCALL2_MEMBASE:
610 case OP_VOIDCALL_MEMBASE:
612 MonoCallInst *call = (MonoCallInst*)ins;
615 if (ins->opcode == OP_VCALL || ins->opcode == OP_VCALL_REG || ins->opcode == OP_VCALL_MEMBASE) {
617 * These are lowered opcodes, but they are in the .md files since the old
618 * JIT passes them to backends.
621 printf (" R%d <-", ins->dreg);
625 char *full_name = mono_method_full_name (call->method, TRUE);
626 printf (" [%s]", full_name);
628 } else if (call->fptr_is_patch) {
629 MonoJumpInfo *ji = (MonoJumpInfo*)call->fptr;
633 } else if (call->fptr) {
634 MonoJitICallInfo *info = mono_find_jit_icall_by_addr (call->fptr);
636 printf (" [%s]", info->name);
639 list = call->out_ireg_args;
644 regpair = (guint32)(gssize)(list->data);
645 hreg = regpair >> 24;
646 reg = regpair & 0xffffff;
648 printf (" [%s <- R%d]", mono_arch_regname (hreg), reg);
650 list = g_slist_next (list);
655 case OP_CALL_HANDLER:
656 printf (" [B%d]", ins->inst_target_bb->block_num);
678 if (!ins->inst_false_bb)
679 printf (" [B%d]", ins->inst_true_bb->block_num);
681 printf (" [B%dB%d]", ins->inst_true_bb->block_num, ins->inst_false_bb->block_num);
683 case OP_LIVERANGE_START:
684 case OP_LIVERANGE_END:
685 case OP_GC_LIVENESS_DEF:
686 case OP_GC_LIVENESS_USE:
687 printf (" R%d", (int)ins->inst_c1);
690 printf (" il: %x", (int)ins->inst_imm);
696 if (spec [MONO_INST_CLOB])
697 printf (" clobbers: %c", spec [MONO_INST_CLOB]);
702 print_regtrack (RegTrack *t, int num)
708 for (i = 0; i < num; ++i) {
711 if (i >= MONO_MAX_IREGS) {
712 g_snprintf (buf, sizeof(buf), "R%d", i);
715 r = mono_arch_regname (i);
716 printf ("liveness: %s [%d - %d]\n", r, t [i].born_in, t[i].killed_in);
722 mono_print_ji (const MonoJumpInfo *ji)
727 mono_print_ins_index (int i, MonoInst *ins)
730 #endif /* !defined(DISABLE_LOGGING) && !defined(DISABLE_JIT) */
733 mono_print_ins (MonoInst *ins)
735 mono_print_ins_index (-1, ins);
739 insert_before_ins (MonoBasicBlock *bb, MonoInst *ins, MonoInst* to_insert)
742 * If this function is called multiple times, the new instructions are inserted
743 * in the proper order.
745 mono_bblock_insert_before_ins (bb, ins, to_insert);
749 insert_after_ins (MonoBasicBlock *bb, MonoInst *ins, MonoInst **last, MonoInst* to_insert)
752 * If this function is called multiple times, the new instructions are inserted in
755 mono_bblock_insert_after_ins (bb, *last, to_insert);
761 get_vreg_bank (MonoCompile *cfg, int reg, int bank)
763 if (vreg_is_ref (cfg, reg))
764 return MONO_REG_INT_REF;
765 else if (vreg_is_mp (cfg, reg))
766 return MONO_REG_INT_MP;
772 * Force the spilling of the variable in the symbolic register 'reg', and free
773 * the hreg it was assigned to.
776 spill_vreg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int reg, int bank)
781 MonoRegState *rs = cfg->rs;
783 symbolic = rs->symbolic [bank];
784 sel = rs->vassign [reg];
786 /* the vreg we need to spill lives in another logical reg bank */
787 bank = translate_bank (cfg->rs, bank, sel);
789 /*i = rs->isymbolic [sel];
790 g_assert (i == reg);*/
792 spill = ++cfg->spill_count;
793 rs->vassign [i] = -spill - 1;
794 if (G_UNLIKELY (bank))
795 mono_regstate_free_general (rs, sel, bank);
797 mono_regstate_free_int (rs, sel);
798 /* we need to create a spill var and insert a load to sel after the current instruction */
799 MONO_INST_NEW (cfg, load, regbank_load_ops [bank]);
801 load->inst_basereg = cfg->frame_reg;
802 load->inst_offset = mono_spillvar_offset (cfg, spill, get_vreg_bank (cfg, reg, bank));
803 insert_after_ins (bb, ins, last, load);
804 DEBUG (printf ("SPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, bank)));
805 if (G_UNLIKELY (bank))
806 i = mono_regstate_alloc_general (rs, regmask (sel), bank);
808 i = mono_regstate_alloc_int (rs, regmask (sel));
811 if (G_UNLIKELY (bank))
812 mono_regstate_free_general (rs, sel, bank);
814 mono_regstate_free_int (rs, sel);
817 /* This isn't defined on older glib versions and on some platforms */
818 #ifndef G_GUINT64_FORMAT
819 #define G_GUINT64_FORMAT "ul"
823 get_register_spilling (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t regmask, int reg, int bank)
826 int i, sel, spill, num_sregs;
827 int sregs [MONO_MAX_SRC_REGS];
829 MonoRegState *rs = cfg->rs;
831 symbolic = rs->symbolic [bank];
833 g_assert (bank < MONO_NUM_REGBANKS);
835 DEBUG (printf ("\tstart regmask to assign R%d: 0x%08llu (R%d <- R%d R%d R%d)\n", reg, (unsigned long long)regmask, ins->dreg, ins->sreg1, ins->sreg2, ins->sreg3));
836 /* exclude the registers in the current instruction */
837 num_sregs = mono_inst_get_src_registers (ins, sregs);
838 for (i = 0; i < num_sregs; ++i) {
839 if ((sreg_bank_ins (i, ins) == bank) && (reg != sregs [i]) && (reg_is_freeable (sregs [i], bank) || (is_soft_reg (sregs [i], bank) && rs->vassign [sregs [i]] >= 0))) {
840 if (is_soft_reg (sregs [i], bank))
841 regmask &= ~ (regmask (rs->vassign [sregs [i]]));
843 regmask &= ~ (regmask (sregs [i]));
844 DEBUG (printf ("\t\texcluding sreg%d %s %d\n", i + 1, mono_regname_full (sregs [i], bank), sregs [i]));
847 if ((dreg_bank_ins (ins) == bank) && (reg != ins->dreg) && reg_is_freeable (ins->dreg, bank)) {
848 regmask &= ~ (regmask (ins->dreg));
849 DEBUG (printf ("\t\texcluding dreg %s\n", mono_regname_full (ins->dreg, bank)));
852 DEBUG (printf ("\t\tavailable regmask: 0x%08llu\n", (unsigned long long)regmask));
853 g_assert (regmask); /* need at least a register we can free */
855 /* we should track prev_use and spill the register that's farther */
856 if (G_UNLIKELY (bank)) {
857 for (i = 0; i < regbank_size [bank]; ++i) {
858 if (regmask & (regmask (i))) {
861 /* the vreg we need to load lives in another logical bank */
862 bank = translate_bank (cfg->rs, bank, sel);
864 DEBUG (printf ("\t\tselected register %s has assignment %d\n", mono_regname_full (sel, bank), rs->symbolic [bank] [sel]));
869 i = rs->symbolic [bank] [sel];
870 spill = ++cfg->spill_count;
871 rs->vassign [i] = -spill - 1;
872 mono_regstate_free_general (rs, sel, bank);
875 for (i = 0; i < MONO_MAX_IREGS; ++i) {
876 if (regmask & (regmask (i))) {
878 DEBUG (printf ("\t\tselected register %s has assignment %d\n", mono_arch_regname (sel), rs->isymbolic [sel]));
883 i = rs->isymbolic [sel];
884 spill = ++cfg->spill_count;
885 rs->vassign [i] = -spill - 1;
886 mono_regstate_free_int (rs, sel);
889 /* we need to create a spill var and insert a load to sel after the current instruction */
890 MONO_INST_NEW (cfg, load, regbank_load_ops [bank]);
892 load->inst_basereg = cfg->frame_reg;
893 load->inst_offset = mono_spillvar_offset (cfg, spill, get_vreg_bank (cfg, i, bank));
894 insert_after_ins (bb, ins, last, load);
895 DEBUG (printf ("\tSPILLED LOAD (%d at 0x%08lx(%%ebp)) R%d (freed %s)\n", spill, (long)load->inst_offset, i, mono_regname_full (sel, bank)));
896 if (G_UNLIKELY (bank))
897 i = mono_regstate_alloc_general (rs, regmask (sel), bank);
899 i = mono_regstate_alloc_int (rs, regmask (sel));
908 * Free up the hreg HREG by spilling the vreg allocated to it.
911 free_up_hreg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, int hreg, int bank)
913 if (G_UNLIKELY (bank)) {
914 if (!(cfg->rs->free_mask [bank] & (regmask (hreg)))) {
915 bank = translate_bank (cfg->rs, bank, hreg);
916 DEBUG (printf ("\tforced spill of R%d\n", cfg->rs->symbolic [bank] [hreg]));
917 spill_vreg (cfg, bb, last, ins, cfg->rs->symbolic [bank] [hreg], bank);
921 if (!(cfg->rs->ifree_mask & (regmask (hreg)))) {
922 DEBUG (printf ("\tforced spill of R%d\n", cfg->rs->isymbolic [hreg]));
923 spill_vreg (cfg, bb, last, ins, cfg->rs->isymbolic [hreg], bank);
929 create_copy_ins (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, int dest, int src, MonoInst *ins, const unsigned char *ip, int bank)
933 MONO_INST_NEW (cfg, copy, regbank_move_ops [bank]);
939 mono_bblock_insert_after_ins (bb, ins, copy);
942 DEBUG (printf ("\tforced copy from %s to %s\n", mono_regname_full (src, bank), mono_regname_full (dest, bank)));
946 static inline const char*
947 regbank_to_string (int bank)
949 if (bank == MONO_REG_INT_REF)
951 else if (bank == MONO_REG_INT_MP)
958 create_spilled_store (MonoCompile *cfg, MonoBasicBlock *bb, int spill, int reg, int prev_reg, MonoInst **last, MonoInst *ins, MonoInst *insert_before, int bank)
960 MonoInst *store, *def;
962 bank = get_vreg_bank (cfg, prev_reg, bank);
964 MONO_INST_NEW (cfg, store, regbank_store_ops [bank]);
966 store->inst_destbasereg = cfg->frame_reg;
967 store->inst_offset = mono_spillvar_offset (cfg, spill, bank);
969 mono_bblock_insert_after_ins (bb, ins, store);
971 } else if (insert_before) {
972 insert_before_ins (bb, insert_before, store);
974 g_assert_not_reached ();
976 DEBUG (printf ("\t%sSPILLED STORE (%d at 0x%08lx(%%ebp)) R%d (from %s)\n", regbank_to_string (bank), spill, (long)store->inst_offset, prev_reg, mono_regname_full (reg, bank)));
978 if (((bank == MONO_REG_INT_REF) || (bank == MONO_REG_INT_MP)) && cfg->compute_gc_maps) {
979 g_assert (prev_reg != -1);
980 MONO_INST_NEW (cfg, def, OP_GC_SPILL_SLOT_LIVENESS_DEF);
981 def->inst_c0 = spill;
983 mono_bblock_insert_after_ins (bb, store, def);
987 /* flags used in reginfo->flags */
989 MONO_FP_NEEDS_LOAD_SPILL = regmask (0),
990 MONO_FP_NEEDS_SPILL = regmask (1),
991 MONO_FP_NEEDS_LOAD = regmask (2)
995 alloc_int_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, RegTrack *info)
999 if (info && info->preferred_mask) {
1000 val = mono_regstate_alloc_int (cfg->rs, info->preferred_mask & dest_mask);
1002 DEBUG (printf ("\tallocated preferred reg R%d to %s\n", sym_reg, mono_arch_regname (val)));
1007 val = mono_regstate_alloc_int (cfg->rs, dest_mask);
1009 val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, 0);
1015 alloc_general_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, int bank)
1019 val = mono_regstate_alloc_general (cfg->rs, dest_mask, bank);
1022 val = get_register_spilling (cfg, bb, last, ins, dest_mask, sym_reg, bank);
1028 alloc_reg (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **last, MonoInst *ins, regmask_t dest_mask, int sym_reg, RegTrack *info, int bank)
1030 if (G_UNLIKELY (bank))
1031 return alloc_general_reg (cfg, bb, last, ins, dest_mask, sym_reg, bank);
1033 return alloc_int_reg (cfg, bb, last, ins, dest_mask, sym_reg, info);
1037 assign_reg (MonoCompile *cfg, MonoRegState *rs, int reg, int hreg, int bank)
1039 if (G_UNLIKELY (bank)) {
1042 g_assert (reg >= regbank_size [bank]);
1043 g_assert (hreg < regbank_size [bank]);
1044 g_assert (! is_global_freg (hreg));
1046 rs->vassign [reg] = hreg;
1047 rs->symbolic [bank] [hreg] = reg;
1048 rs->free_mask [bank] &= ~ (regmask (hreg));
1050 mirrored_bank = get_mirrored_bank (bank);
1051 if (mirrored_bank == -1)
1054 /* Make sure the other logical reg bank that this bank shares
1055 * a single hard reg bank knows that this hard reg is not free.
1057 rs->free_mask [mirrored_bank] = rs->free_mask [bank];
1059 /* Mark the other logical bank that the this bank shares
1060 * a single hard reg bank with as mirrored.
1062 rs->symbolic [mirrored_bank] [hreg] = MONO_ARCH_BANK_MIRRORED;
1066 g_assert (reg >= MONO_MAX_IREGS);
1067 g_assert (hreg < MONO_MAX_IREGS);
1069 /* this seems to trigger a gcc compilation bug sometime (hreg is 0) */
1070 g_assert (! is_global_ireg (hreg));
1073 rs->vassign [reg] = hreg;
1074 rs->isymbolic [hreg] = reg;
1075 rs->ifree_mask &= ~ (regmask (hreg));
1079 static inline regmask_t
1080 get_callee_mask (const char spec)
1082 if (G_UNLIKELY (reg_bank (spec)))
1083 return regbank_callee_regs [reg_bank (spec)];
1084 return MONO_ARCH_CALLEE_REGS;
1087 static gint8 desc_to_fixed_reg [256];
1088 static gboolean desc_to_fixed_reg_inited = FALSE;
1093 * Local register allocation.
1094 * We first scan the list of instructions and we save the liveness info of
1095 * each register (when the register is first used, when it's value is set etc.).
1096 * We also reverse the list of instructions because assigning registers backwards allows
1097 * for more tricks to be used.
1100 mono_local_regalloc (MonoCompile *cfg, MonoBasicBlock *bb)
1102 MonoInst *ins, *prev, *last;
1104 MonoRegState *rs = cfg->rs;
1108 unsigned char spec_src1, spec_dest;
1110 #if MONO_ARCH_USE_FPSTACK
1111 gboolean has_fp = FALSE;
1116 int sregs [MONO_MAX_SRC_REGS];
1121 if (!desc_to_fixed_reg_inited) {
1122 for (i = 0; i < 256; ++i)
1123 desc_to_fixed_reg [i] = MONO_ARCH_INST_FIXED_REG (i);
1124 desc_to_fixed_reg_inited = TRUE;
1126 /* Validate the cpu description against the info in mini-ops.h */
1127 #if defined(TARGET_AMD64) || defined(TARGET_X86) || defined(TARGET_ARM)
1128 for (i = OP_LOAD; i < OP_LAST; ++i) {
1131 spec = ins_get_spec (i);
1132 ispec = INS_INFO (i);
1134 if ((spec [MONO_INST_DEST] && (ispec [MONO_INST_DEST] == ' ')))
1135 printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
1136 if ((spec [MONO_INST_SRC1] && (ispec [MONO_INST_SRC1] == ' ')))
1137 printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
1138 if ((spec [MONO_INST_SRC2] && (ispec [MONO_INST_SRC2] == ' ')))
1139 printf ("Instruction metadata for %s inconsistent.\n", mono_inst_name (i));
1144 rs->next_vreg = bb->max_vreg;
1145 mono_regstate_assign (rs);
1147 rs->ifree_mask = MONO_ARCH_CALLEE_REGS;
1148 for (i = 0; i < MONO_NUM_REGBANKS; ++i)
1149 rs->free_mask [i] = regbank_callee_regs [i];
1151 max = rs->next_vreg;
1153 if (cfg->reginfo && cfg->reginfo_len < max)
1154 cfg->reginfo = NULL;
1156 reginfo = cfg->reginfo;
1158 cfg->reginfo_len = MAX (1024, max * 2);
1159 reginfo = cfg->reginfo = mono_mempool_alloc (cfg->mempool, sizeof (RegTrack) * cfg->reginfo_len);
1162 g_assert (cfg->reginfo_len >= rs->next_vreg);
1164 if (cfg->verbose_level > 1) {
1165 /* print_regtrack reads the info of all variables */
1166 memset (cfg->reginfo, 0, cfg->reginfo_len * sizeof (RegTrack));
1170 * For large methods, next_vreg can be very large, so g_malloc0 time can
1171 * be prohibitive. So we manually init the reginfo entries used by the
1174 for (ins = bb->code; ins; ins = ins->next) {
1175 spec = ins_get_spec (ins->opcode);
1177 if ((ins->dreg != -1) && (ins->dreg < max)) {
1178 memset (®info [ins->dreg], 0, sizeof (RegTrack));
1179 #if SIZEOF_REGISTER == 4
1180 if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_DEST])) {
1182 * In the new IR, the two vregs of the regpair do not alias the
1183 * original long vreg. shift the vreg here so the rest of the
1184 * allocator doesn't have to care about it.
1187 memset (®info [ins->dreg + 1], 0, sizeof (RegTrack));
1192 num_sregs = mono_inst_get_src_registers (ins, sregs);
1193 for (j = 0; j < num_sregs; ++j) {
1194 g_assert (sregs [j] != -1);
1195 if (sregs [j] < max) {
1196 memset (®info [sregs [j]], 0, sizeof (RegTrack));
1197 #if SIZEOF_REGISTER == 4
1198 if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC1 + j])) {
1200 memset (®info [sregs [j] + 1], 0, sizeof (RegTrack));
1205 mono_inst_set_src_registers (ins, sregs);
1208 /*if (cfg->opt & MONO_OPT_COPYPROP)
1209 local_copy_prop (cfg, ins);*/
1212 DEBUG (printf ("\nLOCAL REGALLOC BLOCK %d:\n", bb->block_num));
1213 /* forward pass on the instructions to collect register liveness info */
1214 MONO_BB_FOR_EACH_INS (bb, ins) {
1215 spec = ins_get_spec (ins->opcode);
1216 spec_dest = spec [MONO_INST_DEST];
1218 if (G_UNLIKELY (spec == MONO_ARCH_CPU_SPEC)) {
1219 g_error ("Opcode '%s' missing from machine description file.", mono_inst_name (ins->opcode));
1222 DEBUG (mono_print_ins_index (i, ins));
1224 num_sregs = mono_inst_get_src_registers (ins, sregs);
1226 #if MONO_ARCH_USE_FPSTACK
1227 if (dreg_is_fp (spec)) {
1230 for (j = 0; j < num_sregs; ++j) {
1231 if (sreg_is_fp (j, spec))
1237 for (j = 0; j < num_sregs; ++j) {
1238 int sreg = sregs [j];
1239 int sreg_spec = spec [MONO_INST_SRC1 + j];
1241 bank = sreg_bank (j, spec);
1242 g_assert (sreg != -1);
1243 if (is_soft_reg (sreg, bank))
1244 /* This means the vreg is not local to this bb */
1245 g_assert (reginfo [sreg].born_in > 0);
1246 rs->vassign [sreg] = -1;
1247 //reginfo [ins->sreg2].prev_use = reginfo [ins->sreg2].last_use;
1248 //reginfo [ins->sreg2].last_use = i;
1249 if (MONO_ARCH_INST_IS_REGPAIR (sreg_spec)) {
1250 /* The virtual register is allocated sequentially */
1251 rs->vassign [sreg + 1] = -1;
1252 //reginfo [ins->sreg2 + 1].prev_use = reginfo [ins->sreg2 + 1].last_use;
1253 //reginfo [ins->sreg2 + 1].last_use = i;
1254 if (reginfo [sreg + 1].born_in == 0 || reginfo [sreg + 1].born_in > i)
1255 reginfo [sreg + 1].born_in = i;
1261 mono_inst_set_src_registers (ins, sregs);
1266 bank = dreg_bank (spec);
1267 if (spec_dest != 'b') /* it's not just a base register */
1268 reginfo [ins->dreg].killed_in = i;
1269 g_assert (ins->dreg != -1);
1270 rs->vassign [ins->dreg] = -1;
1271 //reginfo [ins->dreg].prev_use = reginfo [ins->dreg].last_use;
1272 //reginfo [ins->dreg].last_use = i;
1273 if (reginfo [ins->dreg].born_in == 0 || reginfo [ins->dreg].born_in > i)
1274 reginfo [ins->dreg].born_in = i;
1276 dest_dreg = desc_to_fixed_reg [spec_dest];
1277 if (dest_dreg != -1)
1278 reginfo [ins->dreg].preferred_mask = (regmask (dest_dreg));
1280 #ifdef MONO_ARCH_INST_FIXED_MASK
1281 reginfo [ins->dreg].preferred_mask |= MONO_ARCH_INST_FIXED_MASK (spec_dest);
1284 if (MONO_ARCH_INST_IS_REGPAIR (spec_dest)) {
1285 /* The virtual register is allocated sequentially */
1286 rs->vassign [ins->dreg + 1] = -1;
1287 //reginfo [ins->dreg + 1].prev_use = reginfo [ins->dreg + 1].last_use;
1288 //reginfo [ins->dreg + 1].last_use = i;
1289 if (reginfo [ins->dreg + 1].born_in == 0 || reginfo [ins->dreg + 1].born_in > i)
1290 reginfo [ins->dreg + 1].born_in = i;
1291 if (MONO_ARCH_INST_REGPAIR_REG2 (spec_dest, -1) != -1)
1292 reginfo [ins->dreg + 1].preferred_mask = regpair_reg2_mask (spec_dest, -1);
1298 if (spec [MONO_INST_CLOB] == 'c' && MONO_IS_CALL (ins)) {
1299 /* A call instruction implicitly uses all registers in call->out_ireg_args */
1301 MonoCallInst *call = (MonoCallInst*)ins;
1304 list = call->out_ireg_args;
1310 regpair = (guint32)(gssize)(list->data);
1311 hreg = regpair >> 24;
1312 reg = regpair & 0xffffff;
1314 //reginfo [reg].prev_use = reginfo [reg].last_use;
1315 //reginfo [reg].last_use = i;
1317 list = g_slist_next (list);
1321 list = call->out_freg_args;
1327 regpair = (guint32)(gssize)(list->data);
1328 hreg = regpair >> 24;
1329 reg = regpair & 0xffffff;
1331 list = g_slist_next (list);
1341 DEBUG (print_regtrack (reginfo, rs->next_vreg));
1342 MONO_BB_FOR_EACH_INS_REVERSE_SAFE (bb, prev, ins) {
1343 int prev_dreg, clob_dreg;
1344 int dest_dreg, clob_reg;
1345 int dest_sregs [MONO_MAX_SRC_REGS], prev_sregs [MONO_MAX_SRC_REGS];
1346 int dreg_high, sreg1_high;
1347 regmask_t dreg_mask, mask;
1348 regmask_t sreg_masks [MONO_MAX_SRC_REGS], sreg_fixed_masks [MONO_MAX_SRC_REGS];
1349 regmask_t dreg_fixed_mask;
1350 const unsigned char *ip;
1352 spec = ins_get_spec (ins->opcode);
1353 spec_src1 = spec [MONO_INST_SRC1];
1354 spec_dest = spec [MONO_INST_DEST];
1361 dreg_mask = get_callee_mask (spec_dest);
1362 for (j = 0; j < MONO_MAX_SRC_REGS; ++j) {
1363 prev_sregs [j] = -1;
1364 sreg_masks [j] = get_callee_mask (spec [MONO_INST_SRC1 + j]);
1365 dest_sregs [j] = desc_to_fixed_reg [(int)spec [MONO_INST_SRC1 + j]];
1366 #ifdef MONO_ARCH_INST_FIXED_MASK
1367 sreg_fixed_masks [j] = MONO_ARCH_INST_FIXED_MASK (spec [MONO_INST_SRC1 + j]);
1369 sreg_fixed_masks [j] = 0;
1373 DEBUG (printf ("processing:"));
1374 DEBUG (mono_print_ins_index (i, ins));
1383 dest_dreg = desc_to_fixed_reg [spec_dest];
1384 clob_reg = desc_to_fixed_reg [(int)spec [MONO_INST_CLOB]];
1385 sreg_masks [1] &= ~ (MONO_ARCH_INST_SREG2_MASK (spec));
1387 #ifdef MONO_ARCH_INST_FIXED_MASK
1388 dreg_fixed_mask = MONO_ARCH_INST_FIXED_MASK (spec_dest);
1390 dreg_fixed_mask = 0;
1393 num_sregs = mono_inst_get_src_registers (ins, sregs);
1396 * TRACK FIXED SREG2, 3, ...
1398 for (j = 1; j < num_sregs; ++j) {
1399 int sreg = sregs [j];
1400 int dest_sreg = dest_sregs [j];
1402 if (dest_sreg == -1)
1410 * We need to special case this, since on x86, there are only 3
1411 * free registers, and the code below assigns one of them to
1412 * sreg, so we can run out of registers when trying to assign
1413 * dreg. Instead, we just set up the register masks, and let the
1414 * normal sreg2 assignment code handle this. It would be nice to
1415 * do this for all the fixed reg cases too, but there is too much
1419 /* Make sure sreg will be assigned to dest_sreg, and the other sregs won't */
1420 sreg_masks [j] = regmask (dest_sreg);
1421 for (k = 0; k < num_sregs; ++k) {
1423 sreg_masks [k] &= ~ (regmask (dest_sreg));
1427 * Spill sreg1/2 if they are assigned to dest_sreg.
1429 for (k = 0; k < num_sregs; ++k) {
1430 if (k != j && is_soft_reg (sregs [k], 0) && rs->vassign [sregs [k]] == dest_sreg)
1431 free_up_hreg (cfg, bb, tmp, ins, dest_sreg, 0);
1435 * We can also run out of registers while processing sreg2 if sreg3 is
1436 * assigned to another hreg, so spill sreg3 now.
1438 if (is_soft_reg (sreg, 0) && rs->vassign [sreg] >= 0 && rs->vassign [sreg] != dest_sreg) {
1439 spill_vreg (cfg, bb, tmp, ins, sreg, 0);
1444 if (rs->ifree_mask & (regmask (dest_sreg))) {
1445 if (is_global_ireg (sreg)) {
1447 /* Argument already in hard reg, need to copy */
1448 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, sreg, NULL, ip, 0);
1449 insert_before_ins (bb, ins, copy);
1450 for (k = 0; k < num_sregs; ++k) {
1452 sreg_masks [k] &= ~ (regmask (dest_sreg));
1455 val = rs->vassign [sreg];
1457 DEBUG (printf ("\tshortcut assignment of R%d to %s\n", sreg, mono_arch_regname (dest_sreg)));
1458 assign_reg (cfg, rs, sreg, dest_sreg, 0);
1459 } else if (val < -1) {
1461 g_assert_not_reached ();
1463 /* Argument already in hard reg, need to copy */
1464 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, val, NULL, ip, 0);
1467 insert_before_ins (bb, ins, copy);
1468 for (k = 0; k < num_sregs; ++k) {
1470 sreg_masks [k] &= ~ (regmask (dest_sreg));
1473 * Prevent the dreg from being allocate to dest_sreg
1474 * too, since it could force sreg1 to be allocated to
1475 * the same reg on x86.
1477 dreg_mask &= ~ (regmask (dest_sreg));
1481 gboolean need_spill = TRUE;
1482 gboolean need_assign = TRUE;
1485 dreg_mask &= ~ (regmask (dest_sreg));
1486 for (k = 0; k < num_sregs; ++k) {
1488 sreg_masks [k] &= ~ (regmask (dest_sreg));
1492 * First check if dreg is assigned to dest_sreg2, since we
1493 * can't spill a dreg.
1495 if (spec [MONO_INST_DEST])
1496 val = rs->vassign [ins->dreg];
1499 if (val == dest_sreg && ins->dreg != sreg) {
1501 * the destination register is already assigned to
1502 * dest_sreg2: we need to allocate another register for it
1503 * and then copy from this to dest_sreg2.
1506 new_dest = alloc_int_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, ®info [ins->dreg]);
1507 g_assert (new_dest >= 0);
1508 DEBUG (printf ("\tchanging dreg R%d to %s from %s\n", ins->dreg, mono_arch_regname (new_dest), mono_arch_regname (dest_sreg)));
1510 prev_dreg = ins->dreg;
1511 assign_reg (cfg, rs, ins->dreg, new_dest, 0);
1512 clob_dreg = ins->dreg;
1513 create_copy_ins (cfg, bb, tmp, dest_sreg, new_dest, ins, ip, 0);
1514 mono_regstate_free_int (rs, dest_sreg);
1518 if (is_global_ireg (sreg)) {
1519 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sreg, sreg, NULL, ip, 0);
1520 insert_before_ins (bb, ins, copy);
1521 need_assign = FALSE;
1524 val = rs->vassign [sreg];
1525 if (val == dest_sreg) {
1526 /* sreg2 is already assigned to the correct register */
1528 } else if (val < -1) {
1529 /* sreg2 is spilled, it can be assigned to dest_sreg2 */
1530 } else if (val >= 0) {
1531 /* sreg2 already assigned to another register */
1533 * We couldn't emit a copy from val to dest_sreg2, because
1534 * val might be spilled later while processing this
1535 * instruction. So we spill sreg2 so it can be allocated to
1538 free_up_hreg (cfg, bb, tmp, ins, val, 0);
1543 free_up_hreg (cfg, bb, tmp, ins, dest_sreg, 0);
1547 if (rs->vassign [sreg] < -1) {
1550 /* Need to emit a spill store */
1551 spill = - rs->vassign [sreg] - 1;
1552 create_spilled_store (cfg, bb, spill, dest_sreg, sreg, tmp, NULL, ins, bank);
1554 /* force-set sreg2 */
1555 assign_reg (cfg, rs, sregs [j], dest_sreg, 0);
1558 sregs [j] = dest_sreg;
1560 mono_inst_set_src_registers (ins, sregs);
1565 bank = dreg_bank (spec);
1566 if (spec_dest && is_soft_reg (ins->dreg, bank)) {
1567 prev_dreg = ins->dreg;
1570 if (spec_dest == 'b') {
1572 * The dest reg is read by the instruction, not written, so
1573 * avoid allocating sreg1/sreg2 to the same reg.
1575 if (dest_sregs [0] != -1)
1576 dreg_mask &= ~ (regmask (dest_sregs [0]));
1577 for (j = 1; j < num_sregs; ++j) {
1578 if (dest_sregs [j] != -1)
1579 dreg_mask &= ~ (regmask (dest_sregs [j]));
1582 val = rs->vassign [ins->dreg];
1583 if (is_soft_reg (ins->dreg, bank) && (val >= 0) && (!(regmask (val) & dreg_mask))) {
1584 /* DREG is already allocated to a register needed for sreg1 */
1585 spill_vreg (cfg, bb, tmp, ins, ins->dreg, 0);
1590 * If dreg is a fixed regpair, free up both of the needed hregs to avoid
1591 * various complex situations.
1593 if (MONO_ARCH_INST_IS_REGPAIR (spec_dest)) {
1594 guint32 dreg2, dest_dreg2;
1596 g_assert (is_soft_reg (ins->dreg, bank));
1598 if (dest_dreg != -1) {
1599 if (rs->vassign [ins->dreg] != dest_dreg)
1600 free_up_hreg (cfg, bb, tmp, ins, dest_dreg, 0);
1602 dreg2 = ins->dreg + 1;
1603 dest_dreg2 = MONO_ARCH_INST_REGPAIR_REG2 (spec_dest, dest_dreg);
1604 if (dest_dreg2 != -1) {
1605 if (rs->vassign [dreg2] != dest_dreg2)
1606 free_up_hreg (cfg, bb, tmp, ins, dest_dreg2, 0);
1611 if (dreg_fixed_mask) {
1613 if (is_global_ireg (ins->dreg)) {
1615 * The argument is already in a hard reg, but that reg is
1616 * not usable by this instruction, so allocate a new one.
1618 val = mono_regstate_alloc_int (rs, dreg_fixed_mask);
1620 val = get_register_spilling (cfg, bb, tmp, ins, dreg_fixed_mask, -1, bank);
1621 mono_regstate_free_int (rs, val);
1627 dreg_mask &= dreg_fixed_mask;
1630 if (is_soft_reg (ins->dreg, bank)) {
1631 val = rs->vassign [ins->dreg];
1636 /* the register gets spilled after this inst */
1639 val = alloc_reg (cfg, bb, tmp, ins, dreg_mask, ins->dreg, ®info [ins->dreg], bank);
1640 assign_reg (cfg, rs, ins->dreg, val, bank);
1642 create_spilled_store (cfg, bb, spill, val, prev_dreg, tmp, ins, NULL, bank);
1645 DEBUG (printf ("\tassigned dreg %s to dest R%d\n", mono_regname_full (val, bank), ins->dreg));
1649 /* Handle regpairs */
1650 if (MONO_ARCH_INST_IS_REGPAIR (spec_dest)) {
1651 int reg2 = prev_dreg + 1;
1654 g_assert (prev_dreg > -1);
1655 g_assert (!is_global_ireg (rs->vassign [prev_dreg]));
1656 mask = regpair_reg2_mask (spec_dest, rs->vassign [prev_dreg]);
1659 mask &= ~regmask (X86_ECX);
1661 val = rs->vassign [reg2];
1665 /* the register gets spilled after this inst */
1668 val = mono_regstate_alloc_int (rs, mask);
1670 val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
1672 create_spilled_store (cfg, bb, spill, val, reg2, tmp, ins, NULL, bank);
1675 if (! (mask & (regmask (val)))) {
1676 val = mono_regstate_alloc_int (rs, mask);
1678 val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
1680 /* Reallocate hreg to the correct register */
1681 create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, bank);
1683 mono_regstate_free_int (rs, rs->vassign [reg2]);
1687 DEBUG (printf ("\tassigned dreg-high %s to dest R%d\n", mono_arch_regname (val), reg2));
1688 assign_reg (cfg, rs, reg2, val, bank);
1691 ins->backend.reg3 = val;
1693 if (reg_is_freeable (val, bank) && reg2 >= 0 && (reginfo [reg2].born_in >= i)) {
1694 DEBUG (printf ("\tfreeable %s (R%d)\n", mono_arch_regname (val), reg2));
1695 mono_regstate_free_int (rs, val);
1699 if (prev_dreg >= 0 && is_soft_reg (prev_dreg, bank) && (spec_dest != 'b')) {
1701 * In theory, we could free up the hreg even if the vreg is alive,
1702 * but branches inside bblocks force us to assign the same hreg
1703 * to a vreg every time it is encountered.
1705 int dreg = rs->vassign [prev_dreg];
1706 g_assert (dreg >= 0);
1707 DEBUG (printf ("\tfreeable %s (R%d) (born in %d)\n", mono_regname_full (dreg, bank), prev_dreg, reginfo [prev_dreg].born_in));
1708 if (G_UNLIKELY (bank))
1709 mono_regstate_free_general (rs, dreg, bank);
1711 mono_regstate_free_int (rs, dreg);
1712 rs->vassign [prev_dreg] = -1;
1715 if ((dest_dreg != -1) && (ins->dreg != dest_dreg)) {
1716 /* this instruction only outputs to dest_dreg, need to copy */
1717 create_copy_ins (cfg, bb, tmp, ins->dreg, dest_dreg, ins, ip, bank);
1718 ins->dreg = dest_dreg;
1720 if (G_UNLIKELY (bank)) {
1721 /* the register we need to free up may be used in another logical regbank
1722 * so do a translate just in case.
1724 int translated_bank = translate_bank (cfg->rs, bank, dest_dreg);
1725 if (rs->symbolic [translated_bank] [dest_dreg] >= regbank_size [translated_bank])
1726 free_up_hreg (cfg, bb, tmp, ins, dest_dreg, translated_bank);
1729 if (rs->isymbolic [dest_dreg] >= MONO_MAX_IREGS)
1730 free_up_hreg (cfg, bb, tmp, ins, dest_dreg, bank);
1734 if (spec_dest == 'b') {
1736 * The dest reg is read by the instruction, not written, so
1737 * avoid allocating sreg1/sreg2 to the same reg.
1739 for (j = 0; j < num_sregs; ++j)
1740 if (!sreg_bank (j, spec))
1741 sreg_masks [j] &= ~ (regmask (ins->dreg));
1747 if ((clob_reg != -1) && (!(rs->ifree_mask & (regmask (clob_reg))))) {
1748 DEBUG (printf ("\tforced spill of clobbered reg R%d\n", rs->isymbolic [clob_reg]));
1749 free_up_hreg (cfg, bb, tmp, ins, clob_reg, 0);
1752 if (spec [MONO_INST_CLOB] == 'c') {
1753 int j, s, dreg, dreg2, cur_bank;
1756 clob_mask = MONO_ARCH_CALLEE_REGS;
1758 if (rs->ifree_mask != MONO_ARCH_CALLEE_REGS) {
1760 * Need to avoid spilling the dreg since the dreg is not really
1761 * clobbered by the call.
1763 if ((prev_dreg != -1) && !reg_bank (spec_dest))
1764 dreg = rs->vassign [prev_dreg];
1768 if (MONO_ARCH_INST_IS_REGPAIR (spec_dest))
1769 dreg2 = rs->vassign [prev_dreg + 1];
1773 for (j = 0; j < MONO_MAX_IREGS; ++j) {
1775 if ((clob_mask & s) && !(rs->ifree_mask & s) && (j != ins->sreg1)) {
1776 if ((j != dreg) && (j != dreg2))
1777 free_up_hreg (cfg, bb, tmp, ins, j, 0);
1778 else if (rs->isymbolic [j])
1779 /* The hreg is assigned to the dreg of this instruction */
1780 rs->vassign [rs->isymbolic [j]] = -1;
1781 mono_regstate_free_int (rs, j);
1786 for (cur_bank = 1; cur_bank < MONO_NUM_REGBANKS; ++ cur_bank) {
1787 if (rs->free_mask [cur_bank] != regbank_callee_regs [cur_bank]) {
1788 clob_mask = regbank_callee_regs [cur_bank];
1789 if ((prev_dreg != -1) && reg_bank (spec_dest))
1790 dreg = rs->vassign [prev_dreg];
1794 for (j = 0; j < regbank_size [cur_bank]; ++j) {
1796 /* we are looping though the banks in the outer loop
1797 * so, we don't need to deal with mirrored hregs
1798 * because we will get them in one of the other bank passes.
1800 if (is_hreg_mirrored (rs, cur_bank, j))
1804 if ((clob_mask & s) && !(rs->free_mask [cur_bank] & s)) {
1806 free_up_hreg (cfg, bb, tmp, ins, j, cur_bank);
1807 else if (rs->symbolic [cur_bank] [j])
1808 /* The hreg is assigned to the dreg of this instruction */
1809 rs->vassign [rs->symbolic [cur_bank] [j]] = -1;
1810 mono_regstate_free_general (rs, j, cur_bank);
1818 * TRACK ARGUMENT REGS
1820 if (spec [MONO_INST_CLOB] == 'c' && MONO_IS_CALL (ins)) {
1821 MonoCallInst *call = (MonoCallInst*)ins;
1825 * This needs to be done before assigning sreg1, so sreg1 will
1826 * not be assigned one of the argument regs.
1830 * Assign all registers in call->out_reg_args to the proper
1831 * argument registers.
1834 list = call->out_ireg_args;
1840 regpair = (guint32)(gssize)(list->data);
1841 hreg = regpair >> 24;
1842 reg = regpair & 0xffffff;
1844 assign_reg (cfg, rs, reg, hreg, 0);
1846 sreg_masks [0] &= ~(regmask (hreg));
1848 DEBUG (printf ("\tassigned arg reg %s to R%d\n", mono_arch_regname (hreg), reg));
1850 list = g_slist_next (list);
1854 list = call->out_freg_args;
1860 regpair = (guint32)(gssize)(list->data);
1861 hreg = regpair >> 24;
1862 reg = regpair & 0xffffff;
1864 assign_reg (cfg, rs, reg, hreg, 1);
1866 DEBUG (printf ("\tassigned arg reg %s to R%d\n", mono_regname_full (hreg, 1), reg));
1868 list = g_slist_next (list);
1876 bank = sreg1_bank (spec);
1877 if (MONO_ARCH_INST_IS_REGPAIR (spec_dest) && (spec [MONO_INST_CLOB] == '1')) {
1878 int sreg1 = sregs [0];
1879 int dest_sreg1 = dest_sregs [0];
1881 g_assert (is_soft_reg (sreg1, bank));
1883 /* To simplify things, we allocate the same regpair to sreg1 and dreg */
1884 if (dest_sreg1 != -1)
1885 g_assert (dest_sreg1 == ins->dreg);
1886 val = mono_regstate_alloc_int (rs, regmask (ins->dreg));
1887 g_assert (val >= 0);
1889 if (rs->vassign [sreg1] >= 0 && rs->vassign [sreg1] != val)
1891 g_assert_not_reached ();
1893 assign_reg (cfg, rs, sreg1, val, bank);
1895 DEBUG (printf ("\tassigned sreg1-low %s to R%d\n", mono_regname_full (val, bank), sreg1));
1897 g_assert ((regmask (dreg_high)) & regpair_reg2_mask (spec_src1, ins->dreg));
1898 val = mono_regstate_alloc_int (rs, regmask (dreg_high));
1899 g_assert (val >= 0);
1901 if (rs->vassign [sreg1 + 1] >= 0 && rs->vassign [sreg1 + 1] != val)
1903 g_assert_not_reached ();
1905 assign_reg (cfg, rs, sreg1 + 1, val, bank);
1907 DEBUG (printf ("\tassigned sreg1-high %s to R%d\n", mono_regname_full (val, bank), sreg1 + 1));
1909 /* Skip rest of this section */
1910 dest_sregs [0] = -1;
1913 if (sreg_fixed_masks [0]) {
1915 if (is_global_ireg (sregs [0])) {
1917 * The argument is already in a hard reg, but that reg is
1918 * not usable by this instruction, so allocate a new one.
1920 val = mono_regstate_alloc_int (rs, sreg_fixed_masks [0]);
1922 val = get_register_spilling (cfg, bb, tmp, ins, sreg_fixed_masks [0], -1, bank);
1923 mono_regstate_free_int (rs, val);
1924 dest_sregs [0] = val;
1926 /* Fall through to the dest_sreg1 != -1 case */
1929 sreg_masks [0] &= sreg_fixed_masks [0];
1932 if (dest_sregs [0] != -1) {
1933 sreg_masks [0] = regmask (dest_sregs [0]);
1935 if ((rs->vassign [sregs [0]] != dest_sregs [0]) && !(rs->ifree_mask & (regmask (dest_sregs [0])))) {
1936 free_up_hreg (cfg, bb, tmp, ins, dest_sregs [0], 0);
1938 if (is_global_ireg (sregs [0])) {
1939 /* The argument is already in a hard reg, need to copy */
1940 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sregs [0], sregs [0], NULL, ip, 0);
1941 insert_before_ins (bb, ins, copy);
1942 sregs [0] = dest_sregs [0];
1946 if (is_soft_reg (sregs [0], bank)) {
1947 val = rs->vassign [sregs [0]];
1948 prev_sregs [0] = sregs [0];
1952 /* the register gets spilled after this inst */
1956 if ((ins->opcode == OP_MOVE) && !spill && !bank && is_local_ireg (ins->dreg) && (rs->ifree_mask & (regmask (ins->dreg)))) {
1958 * Allocate the same hreg to sreg1 as well so the
1959 * peephole can get rid of the move.
1961 sreg_masks [0] = regmask (ins->dreg);
1964 if (spec [MONO_INST_CLOB] == '1' && !dreg_bank (spec) && (rs->ifree_mask & (regmask (ins->dreg))))
1965 /* Allocate the same reg to sreg1 to avoid a copy later */
1966 sreg_masks [0] = regmask (ins->dreg);
1968 val = alloc_reg (cfg, bb, tmp, ins, sreg_masks [0], sregs [0], ®info [sregs [0]], bank);
1969 assign_reg (cfg, rs, sregs [0], val, bank);
1970 DEBUG (printf ("\tassigned sreg1 %s to R%d\n", mono_regname_full (val, bank), sregs [0]));
1974 * Need to insert before the instruction since it can
1977 create_spilled_store (cfg, bb, spill, val, prev_sregs [0], tmp, NULL, ins, bank);
1980 else if ((dest_sregs [0] != -1) && (dest_sregs [0] != val)) {
1981 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sregs [0], val, NULL, ip, bank);
1982 insert_before_ins (bb, ins, copy);
1983 for (j = 1; j < num_sregs; ++j)
1984 sreg_masks [j] &= ~(regmask (dest_sregs [0]));
1985 val = dest_sregs [0];
1991 prev_sregs [0] = -1;
1993 mono_inst_set_src_registers (ins, sregs);
1995 for (j = 1; j < num_sregs; ++j)
1996 sreg_masks [j] &= ~(regmask (sregs [0]));
1998 /* Handle the case when sreg1 is a regpair but dreg is not */
1999 if (MONO_ARCH_INST_IS_REGPAIR (spec_src1) && (spec [MONO_INST_CLOB] != '1')) {
2000 int reg2 = prev_sregs [0] + 1;
2003 g_assert (prev_sregs [0] > -1);
2004 g_assert (!is_global_ireg (rs->vassign [prev_sregs [0]]));
2005 mask = regpair_reg2_mask (spec_src1, rs->vassign [prev_sregs [0]]);
2006 val = rs->vassign [reg2];
2010 /* the register gets spilled after this inst */
2013 val = mono_regstate_alloc_int (rs, mask);
2015 val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
2017 g_assert_not_reached ();
2020 if (! (mask & (regmask (val)))) {
2021 /* The vreg is already allocated to a wrong hreg */
2023 g_assert_not_reached ();
2025 val = mono_regstate_alloc_int (rs, mask);
2027 val = get_register_spilling (cfg, bb, tmp, ins, mask, reg2, bank);
2029 /* Reallocate hreg to the correct register */
2030 create_copy_ins (cfg, bb, tmp, rs->vassign [reg2], val, ins, ip, bank);
2032 mono_regstate_free_int (rs, rs->vassign [reg2]);
2038 DEBUG (printf ("\tassigned sreg1 hreg %s to dest R%d\n", mono_arch_regname (val), reg2));
2039 assign_reg (cfg, rs, reg2, val, bank);
2042 /* Handle dreg==sreg1 */
2043 if (((dreg_is_fp (spec) && sreg1_is_fp (spec)) || spec [MONO_INST_CLOB] == '1') && ins->dreg != sregs [0]) {
2044 MonoInst *sreg2_copy = NULL;
2046 int bank = reg_bank (spec_src1);
2048 if (ins->dreg == sregs [1]) {
2050 * copying sreg1 to dreg could clobber sreg2, so allocate a new
2053 int reg2 = alloc_reg (cfg, bb, tmp, ins, dreg_mask, sregs [1], NULL, bank);
2055 DEBUG (printf ("\tneed to copy sreg2 %s to reg %s\n", mono_regname_full (sregs [1], bank), mono_regname_full (reg2, bank)));
2056 sreg2_copy = create_copy_ins (cfg, bb, tmp, reg2, sregs [1], NULL, ip, bank);
2057 prev_sregs [1] = sregs [1] = reg2;
2059 if (G_UNLIKELY (bank))
2060 mono_regstate_free_general (rs, reg2, bank);
2062 mono_regstate_free_int (rs, reg2);
2065 if (MONO_ARCH_INST_IS_REGPAIR (spec_src1)) {
2066 /* Copying sreg1_high to dreg could also clobber sreg2 */
2067 if (rs->vassign [prev_sregs [0] + 1] == sregs [1])
2069 g_assert_not_reached ();
2072 * sreg1 and dest are already allocated to the same regpair by the
2073 * SREG1 allocation code.
2075 g_assert (sregs [0] == ins->dreg);
2076 g_assert (dreg_high == sreg1_high);
2079 DEBUG (printf ("\tneed to copy sreg1 %s to dreg %s\n", mono_regname_full (sregs [0], bank), mono_regname_full (ins->dreg, bank)));
2080 copy = create_copy_ins (cfg, bb, tmp, ins->dreg, sregs [0], NULL, ip, bank);
2081 insert_before_ins (bb, ins, copy);
2084 insert_before_ins (bb, copy, sreg2_copy);
2087 * Need to prevent sreg2 to be allocated to sreg1, since that
2088 * would screw up the previous copy.
2090 sreg_masks [1] &= ~ (regmask (sregs [0]));
2091 /* we set sreg1 to dest as well */
2092 prev_sregs [0] = sregs [0] = ins->dreg;
2093 sreg_masks [1] &= ~ (regmask (ins->dreg));
2095 mono_inst_set_src_registers (ins, sregs);
2098 * TRACK SREG2, 3, ...
2100 for (j = 1; j < num_sregs; ++j) {
2103 bank = sreg_bank (j, spec);
2104 if (MONO_ARCH_INST_IS_REGPAIR (spec [MONO_INST_SRC1 + j]))
2105 g_assert_not_reached ();
2107 if (dest_sregs [j] != -1 && is_global_ireg (sregs [j])) {
2109 * Argument already in a global hard reg, copy it to the fixed reg, without
2110 * allocating it to the fixed reg.
2112 MonoInst *copy = create_copy_ins (cfg, bb, tmp, dest_sregs [j], sregs [j], NULL, ip, 0);
2113 insert_before_ins (bb, ins, copy);
2114 sregs [j] = dest_sregs [j];
2115 } else if (is_soft_reg (sregs [j], bank)) {
2116 val = rs->vassign [sregs [j]];
2118 if (dest_sregs [j] != -1 && val >= 0 && dest_sregs [j] != val) {
2120 * The sreg is already allocated to a hreg, but not to the fixed
2121 * reg required by the instruction. Spill the sreg, so it can be
2122 * allocated to the fixed reg by the code below.
2124 /* Currently, this code should only be hit for CAS */
2125 spill_vreg (cfg, bb, tmp, ins, sregs [j], 0);
2126 val = rs->vassign [sregs [j]];
2132 /* the register gets spilled after this inst */
2135 val = alloc_reg (cfg, bb, tmp, ins, sreg_masks [j], sregs [j], ®info [sregs [j]], bank);
2136 assign_reg (cfg, rs, sregs [j], val, bank);
2137 DEBUG (printf ("\tassigned sreg%d %s to R%d\n", j + 1, mono_regname_full (val, bank), sregs [j]));
2140 * Need to insert before the instruction since it can
2143 create_spilled_store (cfg, bb, spill, val, sregs [j], tmp, NULL, ins, bank);
2147 for (k = j + 1; k < num_sregs; ++k)
2148 sreg_masks [k] &= ~ (regmask (sregs [j]));
2151 prev_sregs [j] = -1;
2154 mono_inst_set_src_registers (ins, sregs);
2157 /* Do this only for CAS for now */
2158 for (j = 1; j < num_sregs; ++j) {
2159 int sreg = sregs [j];
2160 int dest_sreg = dest_sregs [j];
2162 if (j == 2 && dest_sreg != -1) {
2165 g_assert (sreg == dest_sreg);
2167 for (k = 0; k < num_sregs; ++k) {
2169 g_assert (sregs [k] != dest_sreg);
2174 /*if (reg_is_freeable (ins->sreg1) && prev_sreg1 >= 0 && reginfo [prev_sreg1].born_in >= i) {
2175 DEBUG (printf ("freeable %s\n", mono_arch_regname (ins->sreg1)));
2176 mono_regstate_free_int (rs, ins->sreg1);
2178 if (reg_is_freeable (ins->sreg2) && prev_sreg2 >= 0 && reginfo [prev_sreg2].born_in >= i) {
2179 DEBUG (printf ("freeable %s\n", mono_arch_regname (ins->sreg2)));
2180 mono_regstate_free_int (rs, ins->sreg2);
2183 DEBUG (mono_print_ins_index (i, ins));
2186 // FIXME: Set MAX_FREGS to 8
2187 // FIXME: Optimize generated code
2188 #if MONO_ARCH_USE_FPSTACK
2190 * Make a forward pass over the code, simulating the fp stack, making sure the
2191 * arguments required by the fp opcodes are at the top of the stack.
2194 MonoInst *prev = NULL;
2198 g_assert (num_sregs <= 2);
2200 for (ins = bb->code; ins; ins = ins->next) {
2201 spec = ins_get_spec (ins->opcode);
2203 DEBUG (printf ("processing:"));
2204 DEBUG (mono_print_ins_index (0, ins));
2206 if (ins->opcode == OP_FMOVE) {
2207 /* Do it by renaming the source to the destination on the stack */
2208 // FIXME: Is this correct ?
2209 for (i = 0; i < sp; ++i)
2210 if (fpstack [i] == ins->sreg1)
2211 fpstack [i] = ins->dreg;
2216 if (sreg1_is_fp (spec) && sreg2_is_fp (spec) && (fpstack [sp - 2] != ins->sreg1)) {
2217 /* Arg1 must be in %st(1) */
2221 while ((i < sp) && (fpstack [i] != ins->sreg1))
2225 if (sp - 1 - i > 0) {
2226 /* First move it to %st(0) */
2227 DEBUG (printf ("\tswap %%st(0) and %%st(%d)\n", sp - 1 - i));
2229 MONO_INST_NEW (cfg, fxch, OP_X86_FXCH);
2230 fxch->inst_imm = sp - 1 - i;
2232 mono_bblock_insert_after_ins (bb, prev, fxch);
2235 tmp = fpstack [sp - 1];
2236 fpstack [sp - 1] = fpstack [i];
2240 /* Then move it to %st(1) */
2241 DEBUG (printf ("\tswap %%st(0) and %%st(1)\n"));
2243 MONO_INST_NEW (cfg, fxch, OP_X86_FXCH);
2246 mono_bblock_insert_after_ins (bb, prev, fxch);
2249 tmp = fpstack [sp - 1];
2250 fpstack [sp - 1] = fpstack [sp - 2];
2251 fpstack [sp - 2] = tmp;
2254 if (sreg2_is_fp (spec)) {
2257 if (fpstack [sp - 1] != ins->sreg2) {
2261 while ((i < sp) && (fpstack [i] != ins->sreg2))
2265 DEBUG (printf ("\tswap %%st(0) and %%st(%d)\n", sp - 1 - i));
2267 MONO_INST_NEW (cfg, fxch, OP_X86_FXCH);
2268 fxch->inst_imm = sp - 1 - i;
2270 mono_bblock_insert_after_ins (bb, prev, fxch);
2273 tmp = fpstack [sp - 1];
2274 fpstack [sp - 1] = fpstack [i];
2281 if (sreg1_is_fp (spec)) {
2284 if (fpstack [sp - 1] != ins->sreg1) {
2288 while ((i < sp) && (fpstack [i] != ins->sreg1))
2292 DEBUG (printf ("\tswap %%st(0) and %%st(%d)\n", sp - 1 - i));
2294 MONO_INST_NEW (cfg, fxch, OP_X86_FXCH);
2295 fxch->inst_imm = sp - 1 - i;
2297 mono_bblock_insert_after_ins (bb, prev, fxch);
2300 tmp = fpstack [sp - 1];
2301 fpstack [sp - 1] = fpstack [i];
2308 if (dreg_is_fp (spec)) {
2310 fpstack [sp ++] = ins->dreg;
2313 if (G_UNLIKELY (cfg->verbose_level >= 2)) {
2315 for (i = 0; i < sp; ++i)
2316 printf ("%s%%fr%d", (i > 0) ? ", " : "", fpstack [i]);
2323 if (sp && bb != cfg->bb_exit && !(bb->out_count == 1 && bb->out_bb [0] == cfg->bb_exit)) {
2324 /* Remove remaining items from the fp stack */
2326 * These can remain for example as a result of a dead fmove like in
2327 * System.Collections.Generic.EqualityComparer<double>.Equals ().
2330 MONO_INST_NEW (cfg, ins, OP_X86_FPOP);
2331 mono_add_ins_to_end (bb, ins);
2340 mono_opcode_to_cond (int opcode)
2350 case OP_COND_EXC_EQ:
2351 case OP_COND_EXC_IEQ:
2360 case OP_COND_EXC_NE_UN:
2361 case OP_COND_EXC_INE_UN:
2362 case OP_CMOV_INE_UN:
2363 case OP_CMOV_LNE_UN:
2388 case OP_COND_EXC_LT:
2389 case OP_COND_EXC_ILT:
2400 case OP_COND_EXC_GT:
2401 case OP_COND_EXC_IGT:
2410 case OP_COND_EXC_LE_UN:
2411 case OP_COND_EXC_ILE_UN:
2412 case OP_CMOV_ILE_UN:
2413 case OP_CMOV_LLE_UN:
2420 case OP_CMOV_IGE_UN:
2421 case OP_CMOV_LGE_UN:
2430 case OP_COND_EXC_LT_UN:
2431 case OP_COND_EXC_ILT_UN:
2432 case OP_CMOV_ILT_UN:
2433 case OP_CMOV_LLT_UN:
2442 case OP_COND_EXC_GT_UN:
2443 case OP_COND_EXC_IGT_UN:
2444 case OP_CMOV_IGT_UN:
2445 case OP_CMOV_LGT_UN:
2448 printf ("%s\n", mono_inst_name (opcode));
2449 g_assert_not_reached ();
2455 mono_negate_cond (CompRelation cond)
2479 g_assert_not_reached ();
2484 mono_opcode_to_type (int opcode, int cmp_opcode)
2486 if ((opcode >= OP_CEQ) && (opcode <= OP_CLT_UN))
2488 else if ((opcode >= OP_IBEQ) && (opcode <= OP_IBLT_UN))
2490 else if ((opcode >= OP_ICEQ) && (opcode <= OP_ICLT_UN))
2492 else if ((opcode >= OP_LBEQ) && (opcode <= OP_LBLT_UN))
2494 else if ((opcode >= OP_LCEQ) && (opcode <= OP_LCLT_UN))
2496 else if ((opcode >= OP_FBEQ) && (opcode <= OP_FBLT_UN))
2498 else if ((opcode >= OP_FCEQ) && (opcode <= OP_FCLT_UN))
2500 else if ((opcode >= OP_COND_EXC_IEQ) && (opcode <= OP_COND_EXC_ILT_UN))
2502 else if ((opcode >= OP_COND_EXC_EQ) && (opcode <= OP_COND_EXC_LT_UN)) {
2503 switch (cmp_opcode) {
2505 case OP_ICOMPARE_IMM:
2511 g_error ("Unknown opcode '%s' in opcode_to_type", mono_inst_name (opcode));
2516 #endif /* DISABLE_JIT */
2519 mono_is_regsize_var (MonoType *t)
2523 t = mono_type_get_underlying_type (t);
2525 case MONO_TYPE_BOOLEAN:
2526 case MONO_TYPE_CHAR:
2536 case MONO_TYPE_FNPTR:
2537 #if SIZEOF_REGISTER == 8
2542 case MONO_TYPE_OBJECT:
2543 case MONO_TYPE_STRING:
2544 case MONO_TYPE_CLASS:
2545 case MONO_TYPE_SZARRAY:
2546 case MONO_TYPE_ARRAY:
2548 case MONO_TYPE_GENERICINST:
2549 if (!mono_type_generic_inst_is_valuetype (t))
2552 case MONO_TYPE_VALUETYPE:
2562 * mono_peephole_ins:
2564 * Perform some architecture independent peephole optimizations.
2567 mono_peephole_ins (MonoBasicBlock *bb, MonoInst *ins)
2569 MonoInst *last_ins = ins->prev;
2571 switch (ins->opcode) {
2573 /* remove unnecessary multiplication with 1 */
2574 if (ins->inst_imm == 1) {
2575 if (ins->dreg != ins->sreg1)
2576 ins->opcode = OP_MOVE;
2578 MONO_DELETE_INS (bb, ins);
2581 case OP_LOAD_MEMBASE:
2582 case OP_LOADI4_MEMBASE:
2584 * Note: if reg1 = reg2 the load op is removed
2586 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2587 * OP_LOAD_MEMBASE offset(basereg), reg2
2589 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2590 * OP_MOVE reg1, reg2
2592 if (last_ins && last_ins->opcode == OP_GC_LIVENESS_DEF)
2593 last_ins = last_ins->prev;
2595 (((ins->opcode == OP_LOADI4_MEMBASE) && (last_ins->opcode == OP_STOREI4_MEMBASE_REG)) ||
2596 ((ins->opcode == OP_LOAD_MEMBASE) && (last_ins->opcode == OP_STORE_MEMBASE_REG))) &&
2597 ins->inst_basereg == last_ins->inst_destbasereg &&
2598 ins->inst_offset == last_ins->inst_offset) {
2599 if (ins->dreg == last_ins->sreg1) {
2600 MONO_DELETE_INS (bb, ins);
2603 ins->opcode = OP_MOVE;
2604 ins->sreg1 = last_ins->sreg1;
2608 * Note: reg1 must be different from the basereg in the second load
2609 * Note: if reg1 = reg2 is equal then second load is removed
2611 * OP_LOAD_MEMBASE offset(basereg), reg1
2612 * OP_LOAD_MEMBASE offset(basereg), reg2
2614 * OP_LOAD_MEMBASE offset(basereg), reg1
2615 * OP_MOVE reg1, reg2
2617 } if (last_ins && (last_ins->opcode == OP_LOADI4_MEMBASE
2618 || last_ins->opcode == OP_LOAD_MEMBASE) &&
2619 ins->inst_basereg != last_ins->dreg &&
2620 ins->inst_basereg == last_ins->inst_basereg &&
2621 ins->inst_offset == last_ins->inst_offset) {
2623 if (ins->dreg == last_ins->dreg) {
2624 MONO_DELETE_INS (bb, ins);
2626 ins->opcode = OP_MOVE;
2627 ins->sreg1 = last_ins->dreg;
2630 //g_assert_not_reached ();
2634 * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2635 * OP_LOAD_MEMBASE offset(basereg), reg
2637 * OP_STORE_MEMBASE_IMM imm, offset(basereg)
2638 * OP_ICONST reg, imm
2640 } else if (last_ins && (last_ins->opcode == OP_STOREI4_MEMBASE_IMM
2641 || last_ins->opcode == OP_STORE_MEMBASE_IMM) &&
2642 ins->inst_basereg == last_ins->inst_destbasereg &&
2643 ins->inst_offset == last_ins->inst_offset) {
2644 ins->opcode = OP_ICONST;
2645 ins->inst_c0 = last_ins->inst_imm;
2646 g_assert_not_reached (); // check this rule
2650 case OP_LOADI1_MEMBASE:
2651 case OP_LOADU1_MEMBASE:
2653 * Note: if reg1 = reg2 the load op is removed
2655 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2656 * OP_LOAD_MEMBASE offset(basereg), reg2
2658 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2659 * OP_MOVE reg1, reg2
2661 if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
2662 ins->inst_basereg == last_ins->inst_destbasereg &&
2663 ins->inst_offset == last_ins->inst_offset) {
2664 ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? OP_PCONV_TO_I1 : OP_PCONV_TO_U1;
2665 ins->sreg1 = last_ins->sreg1;
2668 case OP_LOADI2_MEMBASE:
2669 case OP_LOADU2_MEMBASE:
2671 * Note: if reg1 = reg2 the load op is removed
2673 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2674 * OP_LOAD_MEMBASE offset(basereg), reg2
2676 * OP_STORE_MEMBASE_REG reg1, offset(basereg)
2677 * OP_MOVE reg1, reg2
2679 if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
2680 ins->inst_basereg == last_ins->inst_destbasereg &&
2681 ins->inst_offset == last_ins->inst_offset) {
2682 #if SIZEOF_REGISTER == 8
2683 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? OP_PCONV_TO_I2 : OP_PCONV_TO_U2;
2685 /* The definition of OP_PCONV_TO_U2 is wrong */
2686 ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? OP_PCONV_TO_I2 : OP_ICONV_TO_U2;
2688 ins->sreg1 = last_ins->sreg1;
2698 if (ins->dreg == ins->sreg1) {
2699 MONO_DELETE_INS (bb, ins);
2705 * OP_MOVE sreg, dreg
2706 * OP_MOVE dreg, sreg
2708 if (last_ins && last_ins->opcode == ins->opcode &&
2709 ins->sreg1 == last_ins->dreg &&
2710 ins->dreg == last_ins->sreg1) {
2711 MONO_DELETE_INS (bb, ins);
2715 MONO_DELETE_INS (bb, ins);
2721 mini_exception_id_by_name (const char *name)
2723 if (strcmp (name, "IndexOutOfRangeException") == 0)
2724 return MONO_EXC_INDEX_OUT_OF_RANGE;
2725 if (strcmp (name, "OverflowException") == 0)
2726 return MONO_EXC_OVERFLOW;
2727 if (strcmp (name, "ArithmeticException") == 0)
2728 return MONO_EXC_ARITHMETIC;
2729 if (strcmp (name, "DivideByZeroException") == 0)
2730 return MONO_EXC_DIVIDE_BY_ZERO;
2731 if (strcmp (name, "InvalidCastException") == 0)
2732 return MONO_EXC_INVALID_CAST;
2733 if (strcmp (name, "NullReferenceException") == 0)
2734 return MONO_EXC_NULL_REF;
2735 if (strcmp (name, "ArrayTypeMismatchException") == 0)
2736 return MONO_EXC_ARRAY_TYPE_MISMATCH;
2737 if (strcmp (name, "ArgumentException") == 0)
2738 return MONO_EXC_ARGUMENT;
2739 g_error ("Unknown intrinsic exception %s\n", name);
2743 #endif /* DISABLE_JIT */