mono/mini/inssel-amd64.brg

   1 #define MONO_EMIT_NEW_X86_COMPARE_MEMBASE_REG(cfg,basereg,offset,operand) do { \
   2                 MonoInst *inst; \
   3                 inst = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst)); \
   4                 inst->opcode = OP_X86_COMPARE_MEMBASE_REG; \
   5                 inst->inst_basereg = basereg; \
   6                 inst->inst_offset = offset; \
   7                 inst->sreg2 = operand; \
   8                 mono_bblock_add_inst (cfg->cbb, inst); \
   9         } while (0)
  10
  11 #define MONO_EMIT_NEW_X86_COMPARE_MEMBASE_IMM(cfg,basereg,offset,operand) do { \
  12                 MonoInst *inst; \
  13                 inst = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst)); \
  14                 inst->opcode = OP_X86_COMPARE_MEMBASE_IMM; \
  15                 inst->inst_basereg = basereg; \
  16                 inst->inst_offset = offset; \
  17                 inst->inst_imm = operand; \
  18                 mono_bblock_add_inst (cfg->cbb, inst); \
  19         } while (0)
  20
  21 /* override the arch independant versions with fast x86 versions */
  22
  23 #undef MONO_EMIT_BOUNDS_CHECK
  24 #undef MONO_EMIT_BOUNDS_CHECK_IMM
  25
  26 #define MONO_EMIT_BOUNDS_CHECK(cfg, array_reg, array_type, array_length_field, index_reg) do { \
  27                 if (! (state->tree->flags & MONO_INST_NORANGECHECK)) { \
  28                         MONO_EMIT_NEW_X86_COMPARE_MEMBASE_REG (cfg, array_reg, G_STRUCT_OFFSET (array_type, array_length_field), index_reg); \
  29                         MONO_EMIT_NEW_COND_EXC (cfg, LE_UN, "IndexOutOfRangeException"); \
  30                 } \
  31         } while (0)
  32
  33 #define MONO_EMIT_BOUNDS_CHECK_IMM(cfg, array_reg, array_type, array_length_field, index_imm) do { \
  34                 if (! (state->tree->flags & MONO_INST_NORANGECHECK)) { \
  35                         MONO_EMIT_NEW_X86_COMPARE_MEMBASE_IMM (cfg, array_reg, G_STRUCT_OFFSET (array_type, array_length_field), index_imm); \
  36                         MONO_EMIT_NEW_COND_EXC (cfg, LE_UN, "IndexOutOfRangeException"); \
  37                 } \
  38         } while (0)
  39
  40
  41 %%
  42
  43 #
  44 # inssel-x86.brg: burg file for special x86 instructions
  45 #
  46 # Author:
  47 #   Dietmar Maurer (dietmar@ximian.com)
  48 #   Paolo Molaro (lupus@ximian.com)
  49 #
  50 # (C) 2002 Ximian, Inc.
  51 #
  52
  53 stmt: OP_START_HANDLER {
  54         MonoInst *spvar = mono_find_spvar_for_region (s, s->cbb->region);
  55         MONO_EMIT_NEW_STORE_MEMBASE (s, OP_STORE_MEMBASE_REG, spvar->inst_basereg, spvar->inst_offset, X86_ESP);
  56 }
  57
  58 stmt: CEE_ENDFINALLY {
  59         MonoInst *spvar = mono_find_spvar_for_region (s, s->cbb->region);
  60         MONO_EMIT_NEW_LOAD_MEMBASE (s, X86_ESP, spvar->inst_basereg, spvar->inst_offset);
  61         tree->opcode = CEE_RET;
  62         mono_bblock_add_inst (s->cbb, tree);
  63 }
  64
  65 stmt: OP_ENDFILTER (reg) {
  66         MonoInst *spvar = mono_find_spvar_for_region (s, s->cbb->region);
  67         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EAX, state->left->reg1);
  68         MONO_EMIT_NEW_LOAD_MEMBASE (s, X86_ESP, spvar->inst_basereg, spvar->inst_offset);
  69         tree->opcode = CEE_RET;
  70         mono_bblock_add_inst (s->cbb, tree);
  71 }
  72
  73 stmt: CEE_STIND_I8 (OP_REGVAR, reg) {
  74         /* this should only happen for methods returning a long */
  75         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EAX, state->right->reg1);
  76         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->right->reg2);
  77 }
  78
  79 freg: OP_LCONV_TO_R8 (reg) {
  80         tree->sreg1 = state->left->reg1;
  81         tree->dreg = state->reg1;
  82         mono_bblock_add_inst (s->cbb, tree);
  83 }
  84
  85 freg: OP_LCONV_TO_R4 (reg) {
  86         tree->sreg1 = state->left->reg1;
  87         tree->dreg = state->reg1;
  88         mono_bblock_add_inst (s->cbb, tree);
  89 }
  90
  91 freg: CEE_CONV_R_UN (reg) {
  92         MONO_EMIT_NEW_BIALU_IMM (s, OP_X86_PUSH_IMM, -1, -1, 0);
  93         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
  94         tree->opcode = OP_X86_FP_LOAD_I8;
  95         tree->inst_basereg = X86_ESP;
  96         tree->inst_offset = 0;
  97         mono_bblock_add_inst (s->cbb, tree);
  98         MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
  99 }
 100
 101 cflags: OP_COMPARE (CEE_LDIND_I4 (base), reg) {
 102         tree->opcode = OP_AMD64_ICOMPARE_MEMBASE_REG;
 103         tree->inst_basereg = state->left->left->tree->inst_basereg;
 104         tree->inst_offset = state->left->left->tree->inst_offset;
 105         tree->sreg2 = state->right->reg1;
 106         mono_bblock_add_inst (s->cbb, tree);
 107 }
 108
 109 cflags: OP_COMPARE (CEE_LDIND_I4 (base), OP_ICONST) {
 110         tree->opcode = OP_AMD64_ICOMPARE_MEMBASE_IMM;
 111         tree->inst_basereg = state->left->left->tree->inst_basereg;
 112         tree->inst_offset = state->left->left->tree->inst_offset;
 113         tree->inst_imm = state->right->tree->inst_c0;
 114         mono_bblock_add_inst (s->cbb, tree);
 115 }
 116
 117 cflags: OP_COMPARE (reg, CEE_LDIND_I4 (base)) {
 118         tree->opcode = OP_AMD64_ICOMPARE_REG_MEMBASE;
 119         tree->sreg2 = state->right->left->tree->inst_basereg;
 120         tree->inst_offset = state->right->left->tree->inst_offset;
 121         tree->sreg1 = state->left->reg1;
 122         mono_bblock_add_inst (s->cbb, tree);
 123 }
 124
 125 stmt: CEE_STIND_I1 (base, OP_CEQ (cflags)) {
 126         tree->opcode = OP_X86_SETEQ_MEMBASE;
 127         tree->inst_offset = state->left->tree->inst_offset;
 128         tree->inst_basereg = state->left->tree->inst_basereg;
 129         mono_bblock_add_inst (s->cbb, tree);
 130 }
 131
 132 reg: OP_LOCALLOC (OP_ICONST) {
 133         if (tree->flags & MONO_INST_INIT) {
 134                 /* microcoded in mini-x86.c */
 135                 tree->sreg1 = mono_regstate_next_int (s->rs);
 136                 MONO_EMIT_NEW_ICONST (s, tree->sreg1, state->left->tree->inst_c0);
 137                 mono_bblock_add_inst (s->cbb, tree);
 138         } else {
 139                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, state->left->tree->inst_c0);
 140                 MONO_EMIT_UNALU (s, tree, OP_MOVE, state->reg1, X86_ESP);
 141         }
 142 }
 143
 144 reg: OP_LOCALLOC (reg) {
 145         tree->sreg1 = state->left->tree->dreg;
 146         mono_bblock_add_inst (s->cbb, tree);
 147 }
 148
 149 stmt: OP_SETRET (reg) {
 150         tree->opcode = OP_MOVE;
 151         tree->sreg1 = state->left->reg1;
 152         tree->dreg = X86_EAX;
 153         mono_bblock_add_inst (s->cbb, tree);
 154 }
 155
 156 stmt: OP_SETRET (reg) {
 157         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->left->reg2);
 158         tree->opcode = OP_MOVE;
 159         tree->sreg1 = state->left->reg1;
 160         tree->dreg = X86_EAX;
 161         mono_bblock_add_inst (s->cbb, tree);
 162 }
 163
 164 stmt: OP_SETRET (CEE_LDIND_REF (OP_REGVAR)) {
 165         tree->opcode = OP_MOVE;
 166         tree->sreg1 = state->left->left->tree->dreg;
 167         tree->dreg = X86_EAX;
 168         mono_bblock_add_inst (s->cbb, tree);
 169 }
 170
 171 stmt: OP_SETRET (freg) {
 172         tree->opcode = OP_AMD64_SET_XMMREG;
 173         tree->sreg1 = state->left->reg1;
 174         tree->dreg = 0; /* %xmm0 */
 175         mono_bblock_add_inst (s->cbb, tree);
 176         /* nothing to do */
 177 }
 178
 179 stmt: OP_SETRET (OP_ICONST) {
 180         tree->opcode = OP_ICONST;
 181         tree->inst_c0 = state->left->tree->inst_c0;
 182         tree->dreg = X86_EAX;
 183         mono_bblock_add_inst (s->cbb, tree);
 184 }
 185
 186 stmt: OP_OUTARG (reg) {
 187         tree->opcode = OP_X86_PUSH;
 188         tree->sreg1 = state->left->reg1;
 189         mono_bblock_add_inst (s->cbb, tree);
 190 }
 191
 192 stmt: OP_OUTARG_REG (reg) {
 193         tree->opcode = OP_SETREG;
 194         tree->sreg1 = state->left->reg1;
 195         tree->dreg = tree->unused;
 196         mono_bblock_add_inst (s->cbb, tree);
 197 }
 198
 199 # we need to reduce this code duplication with some burg syntax extension
 200 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 201         tree->opcode = OP_X86_PUSH;
 202         tree->sreg1 = state->left->left->tree->dreg;
 203         mono_bblock_add_inst (s->cbb, tree);
 204 }
 205
 206 stmt: OP_OUTARG (CEE_LDIND_I4 (OP_REGVAR)) {
 207         tree->opcode = OP_X86_PUSH;
 208         tree->sreg1 = state->left->left->tree->dreg;
 209         mono_bblock_add_inst (s->cbb, tree);
 210 }
 211
 212 stmt: OP_OUTARG (CEE_LDIND_U4 (OP_REGVAR)) {
 213         tree->opcode = OP_X86_PUSH;
 214         tree->sreg1 = state->left->left->tree->dreg;
 215         mono_bblock_add_inst (s->cbb, tree);
 216 }
 217
 218 stmt: OP_OUTARG (CEE_LDIND_I (OP_REGVAR)) {
 219         tree->opcode = OP_X86_PUSH;
 220         tree->sreg1 = state->left->left->tree->dreg;
 221         mono_bblock_add_inst (s->cbb, tree);
 222 }
 223
 224 stmt: OP_OUTARG (reg) {
 225         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
 226         tree->opcode = OP_X86_PUSH;
 227         tree->sreg1 = state->left->reg1;
 228         mono_bblock_add_inst (s->cbb, tree);
 229 }
 230
 231 stmt: OP_OUTARG (CEE_LDIND_I8 (base)) {
 232         MonoInst *ins;
 233         ins = mono_mempool_alloc0 (s->mempool, sizeof (MonoInst));
 234         ins->opcode = OP_X86_PUSH_MEMBASE;
 235         ins->inst_basereg = state->left->left->tree->inst_basereg;
 236         ins->inst_offset = state->left->left->tree->inst_offset + 4;
 237         mono_bblock_add_inst (s->cbb, ins);
 238
 239         tree->opcode = OP_X86_PUSH_MEMBASE;
 240         tree->inst_basereg = state->left->left->tree->inst_basereg;
 241         tree->inst_offset = state->left->left->tree->inst_offset;
 242         mono_bblock_add_inst (s->cbb, tree);
 243 }
 244
 245 stmt: OP_OUTARG (OP_ICONST) {
 246         tree->opcode = OP_X86_PUSH_IMM;
 247         tree->inst_imm = state->left->tree->inst_c0;
 248         mono_bblock_add_inst (s->cbb, tree);
 249 } cost {
 250         MBCOND (sizeof (gpointer) == 4);
 251
 252         return 0;
 253 }
 254
 255 stmt: OP_OUTARG (CEE_LDIND_I4 (base)) {
 256         tree->opcode = OP_X86_PUSH_MEMBASE;
 257         tree->inst_basereg = state->left->left->tree->inst_basereg;
 258         tree->inst_offset = state->left->left->tree->inst_offset;
 259         mono_bblock_add_inst (s->cbb, tree);
 260 }
 261
 262 stmt: OP_OUTARG (CEE_LDIND_U4 (base)) {
 263         tree->opcode = OP_X86_PUSH_MEMBASE;
 264         tree->inst_basereg = state->left->left->tree->inst_basereg;
 265         tree->inst_offset = state->left->left->tree->inst_offset;
 266         mono_bblock_add_inst (s->cbb, tree);
 267 }
 268
 269 stmt: OP_OUTARG (CEE_LDIND_I (base)) {
 270         tree->opcode = OP_X86_PUSH_MEMBASE;
 271         tree->inst_basereg = state->left->left->tree->inst_basereg;
 272         tree->inst_offset = state->left->left->tree->inst_offset;
 273         mono_bblock_add_inst (s->cbb, tree);
 274 }
 275
 276 stmt: OP_OUTARG (CEE_LDIND_REF (base)) {
 277         tree->opcode = OP_X86_PUSH_MEMBASE;
 278         tree->inst_basereg = state->left->left->tree->inst_basereg;
 279         tree->inst_offset = state->left->left->tree->inst_offset;
 280         mono_bblock_add_inst (s->cbb, tree);
 281 }
 282
 283 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 284         tree->opcode = OP_X86_PUSH;
 285         tree->sreg1 = state->left->left->tree->dreg;
 286         mono_bblock_add_inst (s->cbb, tree);
 287 }
 288
 289 stmt: OP_OUTARG (CEE_LDOBJ (reg)) {
 290         tree->opcode = OP_X86_PUSH;
 291         tree->sreg1 = state->left->reg1;
 292         mono_bblock_add_inst (s->cbb, tree);
 293 }
 294
 295 stmt: OP_OUTARG (freg) {
 296         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 297         tree->opcode = OP_STORER8_MEMBASE_REG;
 298         tree->sreg1 = state->left->reg1;
 299         tree->inst_destbasereg = X86_ESP;
 300         tree->inst_offset = 0;
 301         mono_bblock_add_inst (s->cbb, tree);
 302 }
 303
 304 stmt: OP_OUTARG_R4 (freg) {
 305         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 4);
 306         tree->opcode = OP_STORER4_MEMBASE_REG;
 307         tree->sreg1 = state->left->reg1;
 308         tree->inst_destbasereg = X86_ESP;
 309         tree->inst_offset = 0;
 310         mono_bblock_add_inst (s->cbb, tree);
 311 }
 312
 313 stmt: OP_OUTARG_R8 (freg) {
 314         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 315         tree->opcode = OP_STORER8_MEMBASE_REG;
 316         tree->sreg1 = state->left->reg1;
 317         tree->inst_destbasereg = X86_ESP;
 318         tree->inst_offset = 0;
 319         mono_bblock_add_inst (s->cbb, tree);
 320 }
 321
 322 stmt: OP_AMD64_OUTARG_XMMREG (freg) {
 323         tree->opcode = OP_AMD64_SET_XMMREG;
 324         tree->sreg1 = state->left->reg1;
 325         tree->dreg = tree->unused;
 326         mono_bblock_add_inst (s->cbb, tree);
 327 }
 328
 329 stmt: OP_OUTARG_VT (CEE_LDOBJ (base)) {
 330         MonoInst *vt = state->left->left->tree;
 331         //g_print ("vt size: %d at R%d + %d\n", tree->inst_imm, vt->inst_basereg, vt->inst_offset);
 332
 333         if (!tree->inst_imm)
 334                 return;
 335
 336         if (tree->inst_imm <= 4) {
 337                 tree->opcode = OP_X86_PUSH_MEMBASE;
 338                 tree->inst_basereg = vt->inst_basereg;
 339                 tree->inst_offset = vt->inst_offset;
 340                 mono_bblock_add_inst (s->cbb, tree);
 341         } else if (tree->inst_imm <= 20) {
 342                 int sz = tree->inst_imm;
 343                 sz += 3;
 344                 sz &= ~3;
 345                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, sz);
 346                 mini_emit_memcpy (s, X86_ESP, 0, vt->inst_basereg, vt->inst_offset, tree->inst_imm, 0);
 347         } else {
 348                 tree->opcode = OP_X86_PUSH_OBJ;
 349                 tree->inst_basereg = vt->inst_basereg;
 350                 tree->inst_offset = vt->inst_offset;
 351                 mono_bblock_add_inst (s->cbb, tree);
 352         }
 353 }
 354
 355 stmt: OP_OUTARG_VT (OP_ICONST) {
 356         tree->opcode = OP_X86_PUSH_IMM;
 357         tree->inst_imm = state->left->tree->inst_c0;
 358         mono_bblock_add_inst (s->cbb, tree);
 359 }
 360
 361 stmt: OP_OUTARG_VT (reg) {
 362         tree->opcode = OP_X86_PUSH;
 363         tree->sreg1 = state->left->tree->dreg;
 364         mono_bblock_add_inst (s->cbb, tree);
 365 }
 366
 367 reg: OP_LDADDR (OP_REGOFFSET) "1" {
 368         if (state->left->tree->inst_offset) {
 369                 tree->opcode = OP_X86_LEA_MEMBASE;
 370                 tree->sreg1 = state->left->tree->inst_basereg;
 371                 tree->inst_imm = state->left->tree->inst_offset;
 372                 tree->dreg = state->reg1;
 373         } else {
 374                 tree->opcode = OP_MOVE;
 375                 tree->sreg1 = state->left->tree->inst_basereg;
 376                 tree->dreg = state->reg1;
 377         }
 378         mono_bblock_add_inst (s->cbb, tree);
 379 }
 380
 381 reg: CEE_LDOBJ (OP_REGOFFSET) "1" {
 382         if (state->left->tree->inst_offset) {
 383                 tree->opcode = OP_X86_LEA_MEMBASE;
 384                 tree->sreg1 = state->left->tree->inst_basereg;
 385                 tree->inst_imm = state->left->tree->inst_offset;
 386                 tree->dreg = state->reg1;
 387         } else {
 388                 tree->opcode = OP_MOVE;
 389                 tree->sreg1 = state->left->tree->inst_basereg;
 390                 tree->dreg = state->reg1;
 391         }
 392         mono_bblock_add_inst (s->cbb, tree);
 393 }
 394
 395 reg: CEE_LDELEMA (reg, reg) "15" {
 396         guint32 size = mono_class_array_element_size (tree->klass);
 397
 398         MONO_EMIT_BOUNDS_CHECK (s, state->left->reg1, MonoArray, max_length, state->right->reg1);
 399
 400         if (size == 1 || size == 2 || size == 4 || size == 8) {
 401                 static const int fast_log2 [] = { 1, 0, 1, -1, 2, -1, -1, -1, 3 };
 402                 tree->opcode = OP_X86_LEA;
 403                 tree->dreg = state->reg1;
 404                 tree->sreg1 = state->left->reg1;
 405                 tree->sreg2 = state->right->reg1;
 406                 tree->inst_imm = G_STRUCT_OFFSET (MonoArray, vector);
 407                 tree->unused = fast_log2 [size];
 408                 mono_bblock_add_inst (s->cbb, tree);
 409         } else {
 410                 int mult_reg = mono_regstate_next_int (s->rs);
 411                 int add_reg = mono_regstate_next_int (s->rs);
 412                 MONO_EMIT_NEW_BIALU_IMM (s, OP_MUL_IMM, mult_reg, state->right->reg1, size);
 413                 MONO_EMIT_NEW_BIALU (s, CEE_ADD, add_reg, mult_reg, state->left->reg1);
 414                 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, state->reg1, add_reg, G_STRUCT_OFFSET (MonoArray, vector));
 415         }
 416 }
 417
 418 stmt: CEE_STIND_R8 (OP_REGVAR, freg) {
 419         /* nothing to do: the value is already on the FP stack */
 420 }
 421
 422 stmt: CEE_STIND_I4 (base, CEE_ADD (CEE_LDIND_I4 (base), OP_ICONST)) {
 423         int con = state->right->right->tree->inst_c0;
 424
 425         if (con == 1) {
 426                 tree->opcode = OP_X86_INC_MEMBASE;
 427         } else {
 428                 tree->opcode = OP_X86_ADD_MEMBASE_IMM;
 429                 tree->inst_imm = con;
 430         }
 431
 432         tree->inst_basereg = state->left->tree->inst_basereg;
 433         tree->inst_offset = state->left->tree->inst_offset;
 434         mono_bblock_add_inst (s->cbb, tree);
 435 } cost {
 436         MBTREE_TYPE *t1 = state->right->left->left->tree;
 437         MBTREE_TYPE *t2 = state->left->tree;
 438         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 439                 t1->inst_offset == t2->inst_offset);
 440         return 2;
 441 }
 442
 443 stmt: CEE_STIND_I4 (base, CEE_SUB (CEE_LDIND_I4 (base), OP_ICONST)) {
 444         int con = state->right->right->tree->inst_c0;
 445
 446         if (con == 1) {
 447                 tree->opcode = OP_X86_DEC_MEMBASE;
 448         } else {
 449                 tree->opcode = OP_X86_SUB_MEMBASE_IMM;
 450                 tree->inst_imm = con;
 451         }
 452
 453         tree->inst_basereg = state->left->tree->inst_basereg;
 454         tree->inst_offset = state->left->tree->inst_offset;
 455         mono_bblock_add_inst (s->cbb, tree);
 456 } cost {
 457         MBTREE_TYPE *t1 = state->right->left->left->tree;
 458         MBTREE_TYPE *t2 = state->left->tree;
 459         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 460                 t1->inst_offset == t2->inst_offset);
 461         return 2;
 462 }
 463
 464 #
 465 # this rules is incorrect, it needs to do an indirect inc (inc_membase)
 466 #stmt: CEE_STIND_I4 (reg, CEE_ADD (reg, OP_ICONST)) {
 467 #       tree->opcode = OP_X86_INC_REG;
 468 #       tree->dreg = state->left->reg1;
 469 #       mono_bblock_add_inst (s->cbb, tree);
 470 #} cost {
 471 #       MBState *s1 = state->left;
 472 #       MBState *s2 = state->right->left;
 473 #       int con = state->right->right->tree->inst_c0;
 474 #       MBCOND (con == 1 && s1->reg1 == s2->reg1);
 475 #       return 1;
 476 #}
 477
 478 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_SUB (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 479         int con = state->right->right->tree->inst_c0;
 480         int dreg = state->left->tree->dreg;
 481         int sreg = state->right->left->left->tree->dreg;
 482
 483         if (con == 1) {
 484                 if (dreg != sreg)
 485                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 486                 tree->opcode = OP_X86_DEC_REG;
 487                 tree->dreg = tree->sreg1 = dreg;
 488         } else if (con == -1) {
 489                 if (dreg != sreg)
 490                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 491                 tree->opcode = OP_X86_INC_REG;
 492                 tree->dreg = tree->sreg1 = dreg;
 493         } else {
 494                 tree->opcode = OP_SUB_IMM;
 495                 tree->inst_imm = con;
 496                 tree->sreg1 = sreg;
 497                 tree->dreg = dreg;
 498         }
 499         mono_bblock_add_inst (s->cbb, tree);
 500 }
 501
 502 stmt: CEE_STIND_I (OP_REGVAR, CEE_ADD (CEE_LDIND_I (OP_REGVAR), OP_ICONST)),
 503 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_ADD (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 504         int con = state->right->right->tree->inst_c0;
 505         int dreg = state->left->tree->dreg;
 506         int sreg = state->right->left->left->tree->dreg;
 507
 508         if (con == 1) {
 509                 if (dreg != sreg)
 510                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 511                 tree->opcode = OP_X86_INC_REG;
 512                 tree->dreg = tree->sreg1 = dreg;
 513         } else if (con == -1) {
 514                 if (dreg != sreg)
 515                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 516                 tree->opcode = OP_X86_DEC_REG;
 517                 tree->dreg = tree->sreg1 = dreg;
 518         } else {
 519                 tree->opcode = OP_ADD_IMM;
 520                 tree->inst_imm = con;
 521                 tree->sreg1 = sreg;
 522                 tree->dreg = dreg;
 523         }
 524         mono_bblock_add_inst (s->cbb, tree);
 525 }
 526
 527 reg: CEE_LDIND_I2 (OP_REGVAR) {
 528         MONO_EMIT_UNALU (s, tree, OP_SEXT_I2, state->reg1, state->left->tree->dreg);
 529 }
 530
 531 # on x86, fp compare overwrites EAX, so we must
 532 # either improve the local register allocator or
 533 # emit coarse opcodes which saves EAX for us.
 534
 535 reg: OP_CEQ (OP_COMPARE (freg, freg)) {
 536         MONO_EMIT_BIALU (s, tree, OP_FCEQ, state->reg1, state->left->left->reg1,
 537                          state->left->right->reg1);
 538 }
 539
 540 reg: OP_CLT (OP_COMPARE (freg, freg)) {
 541         MONO_EMIT_BIALU (s, tree, OP_FCLT, state->reg1, state->left->left->reg1,
 542                          state->left->right->reg1);
 543 }
 544
 545 reg: OP_CLT_UN (OP_COMPARE (freg, freg)) {
 546         MONO_EMIT_BIALU (s, tree, OP_FCLT_UN, state->reg1, state->left->left->reg1,
 547                          state->left->right->reg1);
 548 }
 549
 550 reg: OP_CGT (OP_COMPARE (freg, freg)) {
 551         MONO_EMIT_BIALU (s, tree, OP_FCGT, state->reg1, state->left->left->reg1,
 552                          state->left->right->reg1);
 553 }
 554
 555 reg: OP_CGT_UN (OP_COMPARE (freg, freg)) {
 556         MONO_EMIT_BIALU (s, tree, OP_FCGT_UN, state->reg1, state->left->left->reg1,
 557                          state->left->right->reg1);
 558 }
 559
 560 # fpcflags overwrites EAX, but this does not matter for statements
 561 # because we are the last operation in the tree.
 562
 563 stmt: CEE_BNE_UN (fpcflags) {
 564         tree->opcode = OP_FBNE_UN;
 565         mono_bblock_add_inst (s->cbb, tree);
 566 }
 567
 568 stmt: CEE_BEQ (fpcflags) {
 569         tree->opcode = OP_FBEQ;
 570         mono_bblock_add_inst (s->cbb, tree);
 571 }
 572
 573 stmt: CEE_BLT (fpcflags) {
 574         tree->opcode = OP_FBLT;
 575         mono_bblock_add_inst (s->cbb, tree);
 576 }
 577
 578 stmt: CEE_BLT_UN (fpcflags) {
 579         tree->opcode = OP_FBLT_UN;
 580         mono_bblock_add_inst (s->cbb, tree);
 581 }
 582
 583 stmt: CEE_BGT (fpcflags) {
 584         tree->opcode = OP_FBGT;
 585         mono_bblock_add_inst (s->cbb, tree);
 586 }
 587
 588 stmt: CEE_BGT_UN (fpcflags) {
 589         tree->opcode = OP_FBGT_UN;
 590         mono_bblock_add_inst (s->cbb, tree);
 591 }
 592
 593 stmt: CEE_BGE  (fpcflags) {
 594         tree->opcode = OP_FBGE;
 595         mono_bblock_add_inst (s->cbb, tree);
 596 }
 597
 598 stmt: CEE_BGE_UN (fpcflags) {
 599         tree->opcode = OP_FBGE_UN;
 600         mono_bblock_add_inst (s->cbb, tree);
 601 }
 602
 603 stmt: CEE_BLE  (fpcflags) {
 604         tree->opcode = OP_FBLE;
 605         mono_bblock_add_inst (s->cbb, tree);
 606 }
 607
 608 stmt: CEE_BLE_UN (fpcflags) {
 609         tree->opcode = OP_FBLE_UN;
 610         mono_bblock_add_inst (s->cbb, tree);
 611 }
 612
 613 stmt: CEE_POP (freg) "0" {
 614         /* we need to pop the value from the x86 FP stack */
 615         MONO_EMIT_UNALU (s, tree, OP_X86_FPOP, -1, state->left->reg1);
 616 }
 617
 618 # override the rules in inssel-float.brg that work for machines with FP registers
 619
 620 freg: OP_FCONV_TO_R8 (freg) "0" {
 621         /* nothing to do */
 622 }
 623
 624 freg: OP_FCONV_TO_R4 (freg) "0" {
 625         /* fixme: nothing to do ??*/
 626 }
 627
 628 reg: CEE_ADD(reg, CEE_LDIND_I4 (base)) {
 629         MonoInst *base = state->right->left->tree;
 630
 631         tree->dreg = state->reg1;
 632         tree->sreg1 = state->left->reg1;
 633         tree->sreg2 = base->inst_basereg;
 634         tree->inst_offset = base->inst_offset;
 635         tree->opcode = OP_X86_ADD_MEMBASE;
 636         mono_bblock_add_inst (s->cbb, tree);
 637 }
 638
 639 reg: CEE_SUB(reg, CEE_LDIND_I4 (base)) {
 640         MonoInst *base = state->right->left->tree;
 641
 642         tree->dreg = state->reg1;
 643         tree->sreg1 = state->left->reg1;
 644         tree->sreg2 = base->inst_basereg;
 645         tree->inst_offset = base->inst_offset;
 646         tree->opcode = OP_X86_SUB_MEMBASE;
 647         mono_bblock_add_inst (s->cbb, tree);
 648 }
 649
 650 reg: CEE_MUL(reg, CEE_LDIND_I4 (base)) {
 651         MonoInst *base = state->right->left->tree;
 652
 653         tree->dreg = state->reg1;
 654         tree->sreg1 = state->left->reg1;
 655         tree->sreg2 = base->inst_basereg;
 656         tree->inst_offset = base->inst_offset;
 657         tree->opcode = OP_X86_MUL_MEMBASE;
 658         mono_bblock_add_inst (s->cbb, tree);
 659 }
 660
 661 reg: OP_LSHL (reg, reg) "0" {
 662         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 663 }
 664
 665 reg: OP_LSHL (reg, OP_ICONST) "0" {
 666         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHL_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 667 }
 668
 669 reg: OP_LSHR (reg, reg) "0" {
 670         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 671 }
 672
 673 reg: OP_LSHR (reg, OP_ICONST) "0" {
 674         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 675 }
 676
 677 reg: OP_LSHR_UN (reg, reg) "0" {
 678         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 679 }
 680
 681 reg: OP_LSHR_UN (reg, OP_ICONST) "0" {
 682         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_UN_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 683 }
 684 %%