mono/mini/inssel-x86.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, lreg) {
  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 lreg: OP_LNEG (lreg) "3" {
  80         int tmpr = mono_regstate_next_int (s->rs);
  81         MONO_EMIT_NEW_UNALU (s, CEE_NEG, state->reg1, state->left->reg1);
  82         MONO_EMIT_BIALU_IMM (s, tree, OP_ADC_IMM, tmpr, state->left->reg2, 0);
  83         MONO_EMIT_NEW_UNALU (s, CEE_NEG, state->reg2, tmpr);
  84 }
  85
  86 freg: OP_LCONV_TO_R8 (lreg) {
  87         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
  88         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
  89         tree->opcode = OP_X86_FP_LOAD_I8;
  90         tree->inst_basereg = X86_ESP;
  91         tree->inst_offset = 0;
  92         mono_bblock_add_inst (s->cbb, tree);
  93         MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
  94 }
  95
  96 freg: OP_LCONV_TO_R4 (lreg) {
  97         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
  98         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
  99         tree->opcode = OP_X86_FP_LOAD_I8;
 100         tree->inst_basereg = X86_ESP;
 101         tree->inst_offset = 0;
 102         mono_bblock_add_inst (s->cbb, tree);
 103         /* change precision */
 104         MONO_EMIT_NEW_STORE_MEMBASE (s, OP_STORER4_MEMBASE_REG, X86_ESP, 0, state->reg1);
 105         MONO_EMIT_NEW_LOAD_MEMBASE_OP (s, OP_LOADR4_MEMBASE, state->reg1, X86_ESP, 0);
 106         MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
 107 }
 108
 109 freg: CEE_CONV_R_UN (reg) {
 110         MONO_EMIT_NEW_BIALU_IMM (s, OP_X86_PUSH_IMM, -1, -1, 0);
 111         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg1);
 112         tree->opcode = OP_X86_FP_LOAD_I8;
 113         tree->inst_basereg = X86_ESP;
 114         tree->inst_offset = 0;
 115         mono_bblock_add_inst (s->cbb, tree);
 116         MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, X86_ESP, X86_ESP, 8);
 117 }
 118
 119 cflags: OP_COMPARE (CEE_LDIND_I4 (base), reg) {
 120         tree->opcode = OP_X86_COMPARE_MEMBASE_REG;
 121         tree->inst_basereg = state->left->left->tree->inst_basereg;
 122         tree->inst_offset = state->left->left->tree->inst_offset;
 123         tree->sreg2 = state->right->reg1;
 124         mono_bblock_add_inst (s->cbb, tree);
 125 }
 126
 127 cflags: OP_COMPARE (CEE_LDIND_I4 (base), OP_ICONST) {
 128         tree->opcode = OP_X86_COMPARE_MEMBASE_IMM;
 129         tree->inst_basereg = state->left->left->tree->inst_basereg;
 130         tree->inst_offset = state->left->left->tree->inst_offset;
 131         tree->inst_imm = state->right->tree->inst_c0;
 132         mono_bblock_add_inst (s->cbb, tree);
 133 }
 134
 135 cflags: OP_COMPARE (reg, CEE_LDIND_I4 (base)) {
 136         tree->opcode = OP_X86_COMPARE_REG_MEMBASE;
 137         tree->sreg2 = state->right->left->tree->inst_basereg;
 138         tree->inst_offset = state->right->left->tree->inst_offset;
 139         tree->sreg1 = state->left->reg1;
 140         mono_bblock_add_inst (s->cbb, tree);
 141 }
 142
 143 stmt: CEE_STIND_I1 (base, OP_CEQ (cflags)) {
 144         tree->opcode = OP_X86_SETEQ_MEMBASE;
 145         tree->inst_offset = state->left->tree->inst_offset;
 146         tree->inst_basereg = state->left->tree->inst_basereg;
 147         mono_bblock_add_inst (s->cbb, tree);
 148 }
 149
 150 reg: OP_LOCALLOC (OP_ICONST) {
 151         if (tree->flags & MONO_INST_INIT) {
 152                 /* microcoded in mini-x86.c */
 153                 tree->sreg1 = mono_regstate_next_int (s->rs);
 154                 MONO_EMIT_NEW_ICONST (s, tree->sreg1, state->left->tree->inst_c0);
 155                 mono_bblock_add_inst (s->cbb, tree);
 156         } else {
 157                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, state->left->tree->inst_c0);
 158                 MONO_EMIT_UNALU (s, tree, OP_MOVE, state->reg1, X86_ESP);
 159         }
 160 }
 161
 162 reg: OP_LOCALLOC (reg) {
 163         tree->sreg1 = state->left->tree->dreg;
 164         mono_bblock_add_inst (s->cbb, tree);
 165 }
 166
 167 stmt: OP_SETRET (reg) {
 168         tree->opcode = OP_MOVE;
 169         tree->sreg1 = state->left->reg1;
 170         tree->dreg = X86_EAX;
 171         mono_bblock_add_inst (s->cbb, tree);
 172 }
 173
 174 stmt: OP_SETRET (lreg) {
 175         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->left->reg2);
 176         tree->opcode = OP_MOVE;
 177         tree->sreg1 = state->left->reg1;
 178         tree->dreg = X86_EAX;
 179         mono_bblock_add_inst (s->cbb, tree);
 180 }
 181
 182 stmt: OP_SETRET (CEE_LDIND_REF (OP_REGVAR)) {
 183         tree->opcode = OP_MOVE;
 184         tree->sreg1 = state->left->left->tree->dreg;
 185         tree->dreg = X86_EAX;
 186         mono_bblock_add_inst (s->cbb, tree);
 187 }
 188
 189 stmt: OP_SETRET (freg) {
 190         /* nothing to do */
 191 }
 192
 193 stmt: OP_SETRET (OP_ICONST) {
 194         tree->opcode = OP_ICONST;
 195         tree->inst_c0 = state->left->tree->inst_c0;
 196         tree->dreg = X86_EAX;
 197         mono_bblock_add_inst (s->cbb, tree);
 198 }
 199
 200 stmt: OP_OUTARG (reg) {
 201         tree->opcode = OP_X86_PUSH;
 202         tree->sreg1 = state->left->reg1;
 203         mono_bblock_add_inst (s->cbb, tree);
 204 }
 205
 206 # we need to reduce this code duplication with some burg syntax extension
 207 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 208         tree->opcode = OP_X86_PUSH;
 209         tree->sreg1 = state->left->left->tree->dreg;
 210         mono_bblock_add_inst (s->cbb, tree);
 211 }
 212
 213 stmt: OP_OUTARG (CEE_LDIND_I4 (OP_REGVAR)) {
 214         tree->opcode = OP_X86_PUSH;
 215         tree->sreg1 = state->left->left->tree->dreg;
 216         mono_bblock_add_inst (s->cbb, tree);
 217 }
 218
 219 stmt: OP_OUTARG (CEE_LDIND_U4 (OP_REGVAR)) {
 220         tree->opcode = OP_X86_PUSH;
 221         tree->sreg1 = state->left->left->tree->dreg;
 222         mono_bblock_add_inst (s->cbb, tree);
 223 }
 224
 225 stmt: OP_OUTARG (CEE_LDIND_I (OP_REGVAR)) {
 226         tree->opcode = OP_X86_PUSH;
 227         tree->sreg1 = state->left->left->tree->dreg;
 228         mono_bblock_add_inst (s->cbb, tree);
 229 }
 230
 231 stmt: OP_OUTARG (lreg) {
 232         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
 233         tree->opcode = OP_X86_PUSH;
 234         tree->sreg1 = state->left->reg1;
 235         mono_bblock_add_inst (s->cbb, tree);
 236 }
 237
 238 stmt: OP_OUTARG (CEE_LDIND_I8 (base)) {
 239         MonoInst *ins;
 240         ins = mono_mempool_alloc0 (s->mempool, sizeof (MonoInst));
 241         ins->opcode = OP_X86_PUSH_MEMBASE;
 242         ins->inst_basereg = state->left->left->tree->inst_basereg;
 243         ins->inst_offset = state->left->left->tree->inst_offset + 4;
 244         mono_bblock_add_inst (s->cbb, ins);
 245
 246         tree->opcode = OP_X86_PUSH_MEMBASE;
 247         tree->inst_basereg = state->left->left->tree->inst_basereg;
 248         tree->inst_offset = state->left->left->tree->inst_offset;
 249         mono_bblock_add_inst (s->cbb, tree);
 250 }
 251
 252 stmt: OP_OUTARG (OP_ICONST) {
 253         tree->opcode = OP_X86_PUSH_IMM;
 254         tree->inst_imm = state->left->tree->inst_c0;
 255         mono_bblock_add_inst (s->cbb, tree);
 256 }
 257
 258 stmt: OP_OUTARG (CEE_LDIND_I4 (base)) {
 259         tree->opcode = OP_X86_PUSH_MEMBASE;
 260         tree->inst_basereg = state->left->left->tree->inst_basereg;
 261         tree->inst_offset = state->left->left->tree->inst_offset;
 262         mono_bblock_add_inst (s->cbb, tree);
 263 }
 264
 265 stmt: OP_OUTARG (CEE_LDIND_U4 (base)) {
 266         tree->opcode = OP_X86_PUSH_MEMBASE;
 267         tree->inst_basereg = state->left->left->tree->inst_basereg;
 268         tree->inst_offset = state->left->left->tree->inst_offset;
 269         mono_bblock_add_inst (s->cbb, tree);
 270 }
 271
 272 stmt: OP_OUTARG (CEE_LDIND_I (base)) {
 273         tree->opcode = OP_X86_PUSH_MEMBASE;
 274         tree->inst_basereg = state->left->left->tree->inst_basereg;
 275         tree->inst_offset = state->left->left->tree->inst_offset;
 276         mono_bblock_add_inst (s->cbb, tree);
 277 }
 278
 279 stmt: OP_OUTARG (CEE_LDIND_REF (base)) {
 280         tree->opcode = OP_X86_PUSH_MEMBASE;
 281         tree->inst_basereg = state->left->left->tree->inst_basereg;
 282         tree->inst_offset = state->left->left->tree->inst_offset;
 283         mono_bblock_add_inst (s->cbb, tree);
 284 }
 285
 286 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 287         tree->opcode = OP_X86_PUSH;
 288         tree->sreg1 = state->left->left->tree->dreg;
 289         mono_bblock_add_inst (s->cbb, tree);
 290 }
 291
 292 stmt: OP_OUTARG (CEE_LDOBJ (reg)) {
 293         tree->opcode = OP_X86_PUSH;
 294         tree->sreg1 = state->left->reg1;
 295         mono_bblock_add_inst (s->cbb, tree);
 296 }
 297
 298 stmt: OP_OUTARG (freg) {
 299         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 300         tree->opcode = OP_STORER8_MEMBASE_REG;
 301         tree->sreg1 = state->left->reg1;
 302         tree->inst_destbasereg = X86_ESP;
 303         tree->inst_offset = 0;
 304         mono_bblock_add_inst (s->cbb, tree);
 305 }
 306
 307 stmt: OP_OUTARG_R4 (freg) {
 308         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 4);
 309         tree->opcode = OP_STORER4_MEMBASE_REG;
 310         tree->sreg1 = state->left->reg1;
 311         tree->inst_destbasereg = X86_ESP;
 312         tree->inst_offset = 0;
 313         mono_bblock_add_inst (s->cbb, tree);
 314 }
 315
 316 stmt: OP_OUTARG_R8 (freg) {
 317         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 318         tree->opcode = OP_STORER8_MEMBASE_REG;
 319         tree->sreg1 = state->left->reg1;
 320         tree->inst_destbasereg = X86_ESP;
 321         tree->inst_offset = 0;
 322         mono_bblock_add_inst (s->cbb, tree);
 323 }
 324
 325 stmt: OP_OUTARG_VT (CEE_LDOBJ (base)) {
 326         MonoInst *vt = state->left->left->tree;
 327         //g_print ("vt size: %d at R%d + %d\n", tree->inst_imm, vt->inst_basereg, vt->inst_offset);
 328
 329         if (!tree->inst_imm)
 330                 return;
 331
 332         if (tree->inst_imm <= 4) {
 333                 tree->opcode = OP_X86_PUSH_MEMBASE;
 334                 tree->inst_basereg = vt->inst_basereg;
 335                 tree->inst_offset = vt->inst_offset;
 336                 mono_bblock_add_inst (s->cbb, tree);
 337         } else if (tree->inst_imm <= 20) {
 338                 int sz = tree->inst_imm;
 339                 sz += 3;
 340                 sz &= ~3;
 341                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, sz);
 342                 mini_emit_memcpy (s, X86_ESP, 0, vt->inst_basereg, vt->inst_offset, tree->inst_imm, 0);
 343         } else {
 344                 tree->opcode = OP_X86_PUSH_OBJ;
 345                 tree->inst_basereg = vt->inst_basereg;
 346                 tree->inst_offset = vt->inst_offset;
 347                 mono_bblock_add_inst (s->cbb, tree);
 348         }
 349 }
 350
 351 stmt: OP_OUTARG_VT (OP_ICONST) {
 352         tree->opcode = OP_X86_PUSH_IMM;
 353         tree->inst_imm = state->left->tree->inst_c0;
 354         mono_bblock_add_inst (s->cbb, tree);
 355 }
 356
 357 stmt: OP_OUTARG_VT (reg) {
 358         tree->opcode = OP_X86_PUSH;
 359         tree->sreg1 = state->left->tree->dreg;
 360         mono_bblock_add_inst (s->cbb, tree);
 361 }
 362
 363 reg: OP_LDADDR (OP_REGOFFSET) "1" {
 364         if (state->left->tree->inst_offset) {
 365                 tree->opcode = OP_X86_LEA_MEMBASE;
 366                 tree->sreg1 = state->left->tree->inst_basereg;
 367                 tree->inst_imm = state->left->tree->inst_offset;
 368                 tree->dreg = state->reg1;
 369         } else {
 370                 tree->opcode = OP_MOVE;
 371                 tree->sreg1 = state->left->tree->inst_basereg;
 372                 tree->dreg = state->reg1;
 373         }
 374         mono_bblock_add_inst (s->cbb, tree);
 375 }
 376
 377 reg: CEE_LDOBJ (OP_REGOFFSET) "1" {
 378         if (state->left->tree->inst_offset) {
 379                 tree->opcode = OP_X86_LEA_MEMBASE;
 380                 tree->sreg1 = state->left->tree->inst_basereg;
 381                 tree->inst_imm = state->left->tree->inst_offset;
 382                 tree->dreg = state->reg1;
 383         } else {
 384                 tree->opcode = OP_MOVE;
 385                 tree->sreg1 = state->left->tree->inst_basereg;
 386                 tree->dreg = state->reg1;
 387         }
 388         mono_bblock_add_inst (s->cbb, tree);
 389 }
 390
 391 reg: CEE_LDELEMA (reg, reg) "15" {
 392         guint32 size = mono_class_array_element_size (tree->klass);
 393
 394         MONO_EMIT_BOUNDS_CHECK (s, state->left->reg1, MonoArray, max_length, state->right->reg1);
 395
 396         if (size == 1 || size == 2 || size == 4 || size == 8) {
 397                 static const int fast_log2 [] = { 1, 0, 1, -1, 2, -1, -1, -1, 3 };
 398                 tree->opcode = OP_X86_LEA;
 399                 tree->dreg = state->reg1;
 400                 tree->sreg1 = state->left->reg1;
 401                 tree->sreg2 = state->right->reg1;
 402                 tree->inst_imm = G_STRUCT_OFFSET (MonoArray, vector);
 403                 tree->unused = fast_log2 [size];
 404                 mono_bblock_add_inst (s->cbb, tree);
 405         } else {
 406                 int mult_reg = mono_regstate_next_int (s->rs);
 407                 int add_reg = mono_regstate_next_int (s->rs);
 408                 MONO_EMIT_NEW_BIALU_IMM (s, OP_MUL_IMM, mult_reg, state->right->reg1, size);
 409                 MONO_EMIT_NEW_BIALU (s, CEE_ADD, add_reg, mult_reg, state->left->reg1);
 410                 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, state->reg1, add_reg, G_STRUCT_OFFSET (MonoArray, vector));
 411         }
 412 }
 413
 414 stmt: CEE_STIND_R8 (OP_REGVAR, freg) {
 415         /* nothing to do: the value is already on the FP stack */
 416 }
 417
 418 stmt: CEE_STIND_I4 (base, CEE_ADD (CEE_LDIND_I4 (base), OP_ICONST)) {
 419         int con = state->right->right->tree->inst_c0;
 420
 421         if (con == 1) {
 422                 tree->opcode = OP_X86_INC_MEMBASE;
 423         } else {
 424                 tree->opcode = OP_X86_ADD_MEMBASE_IMM;
 425                 tree->inst_imm = con;
 426         }
 427
 428         tree->inst_basereg = state->left->tree->inst_basereg;
 429         tree->inst_offset = state->left->tree->inst_offset;
 430         mono_bblock_add_inst (s->cbb, tree);
 431 } cost {
 432         MBTREE_TYPE *t1 = state->right->left->left->tree;
 433         MBTREE_TYPE *t2 = state->left->tree;
 434         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 435                 t1->inst_offset == t2->inst_offset);
 436         return 2;
 437 }
 438
 439 stmt: CEE_STIND_I4 (base, CEE_SUB (CEE_LDIND_I4 (base), OP_ICONST)) {
 440         int con = state->right->right->tree->inst_c0;
 441
 442         if (con == 1) {
 443                 tree->opcode = OP_X86_DEC_MEMBASE;
 444         } else {
 445                 tree->opcode = OP_X86_SUB_MEMBASE_IMM;
 446                 tree->inst_imm = con;
 447         }
 448
 449         tree->inst_basereg = state->left->tree->inst_basereg;
 450         tree->inst_offset = state->left->tree->inst_offset;
 451         mono_bblock_add_inst (s->cbb, tree);
 452 } cost {
 453         MBTREE_TYPE *t1 = state->right->left->left->tree;
 454         MBTREE_TYPE *t2 = state->left->tree;
 455         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 456                 t1->inst_offset == t2->inst_offset);
 457         return 2;
 458 }
 459
 460 #
 461 # this rules is incorrect, it needs to do an indirect inc (inc_membase)
 462 #stmt: CEE_STIND_I4 (reg, CEE_ADD (reg, OP_ICONST)) {
 463 #       tree->opcode = OP_X86_INC_REG;
 464 #       tree->dreg = state->left->reg1;
 465 #       mono_bblock_add_inst (s->cbb, tree);
 466 #} cost {
 467 #       MBState *s1 = state->left;
 468 #       MBState *s2 = state->right->left;
 469 #       int con = state->right->right->tree->inst_c0;
 470 #       MBCOND (con == 1 && s1->reg1 == s2->reg1);
 471 #       return 1;
 472 #}
 473
 474 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_SUB (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 475         int con = state->right->right->tree->inst_c0;
 476         int dreg = state->left->tree->dreg;
 477         int sreg = state->right->left->left->tree->dreg;
 478
 479         if (con == 1) {
 480                 if (dreg != sreg)
 481                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 482                 tree->opcode = OP_X86_DEC_REG;
 483                 tree->dreg = tree->sreg1 = dreg;
 484         } else if (con == -1) {
 485                 if (dreg != sreg)
 486                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 487                 tree->opcode = OP_X86_INC_REG;
 488                 tree->dreg = tree->sreg1 = dreg;
 489         } else {
 490                 tree->opcode = OP_SUB_IMM;
 491                 tree->inst_imm = con;
 492                 tree->sreg1 = sreg;
 493                 tree->dreg = dreg;
 494         }
 495         mono_bblock_add_inst (s->cbb, tree);
 496 }
 497
 498 stmt: CEE_STIND_I (OP_REGVAR, CEE_ADD (CEE_LDIND_I (OP_REGVAR), OP_ICONST)),
 499 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_ADD (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 500         int con = state->right->right->tree->inst_c0;
 501         int dreg = state->left->tree->dreg;
 502         int sreg = state->right->left->left->tree->dreg;
 503
 504         if (con == 1) {
 505                 if (dreg != sreg)
 506                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 507                 tree->opcode = OP_X86_INC_REG;
 508                 tree->dreg = tree->sreg1 = dreg;
 509         } else if (con == -1) {
 510                 if (dreg != sreg)
 511                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 512                 tree->opcode = OP_X86_DEC_REG;
 513                 tree->dreg = tree->sreg1 = dreg;
 514         } else {
 515                 tree->opcode = OP_ADD_IMM;
 516                 tree->inst_imm = con;
 517                 tree->sreg1 = sreg;
 518                 tree->dreg = dreg;
 519         }
 520         mono_bblock_add_inst (s->cbb, tree);
 521 }
 522
 523 reg: CEE_LDIND_I2 (OP_REGVAR) {
 524         MONO_EMIT_UNALU (s, tree, OP_SEXT_I2, state->reg1, state->left->tree->dreg);
 525 }
 526
 527 # on x86, fp compare overwrites EAX, so we must
 528 # either improve the local register allocator or
 529 # emit coarse opcodes which saves EAX for us.
 530
 531 reg: OP_CEQ (OP_COMPARE (freg, freg)) {
 532         MONO_EMIT_BIALU (s, tree, OP_FCEQ, state->reg1, state->left->left->reg1,
 533                          state->left->right->reg1);
 534 }
 535
 536 reg: OP_CLT (OP_COMPARE (freg, freg)) {
 537         MONO_EMIT_BIALU (s, tree, OP_FCLT, state->reg1, state->left->left->reg1,
 538                          state->left->right->reg1);
 539 }
 540
 541 reg: OP_CLT_UN (OP_COMPARE (freg, freg)) {
 542         MONO_EMIT_BIALU (s, tree, OP_FCLT_UN, state->reg1, state->left->left->reg1,
 543                          state->left->right->reg1);
 544 }
 545
 546 reg: OP_CGT (OP_COMPARE (freg, freg)) {
 547         MONO_EMIT_BIALU (s, tree, OP_FCGT, state->reg1, state->left->left->reg1,
 548                          state->left->right->reg1);
 549 }
 550
 551 reg: OP_CGT_UN (OP_COMPARE (freg, freg)) {
 552         MONO_EMIT_BIALU (s, tree, OP_FCGT_UN, state->reg1, state->left->left->reg1,
 553                          state->left->right->reg1);
 554 }
 555
 556 # fpcflags overwrites EAX, but this does not matter for statements
 557 # because we are the last operation in the tree.
 558
 559 stmt: CEE_BNE_UN (fpcflags) {
 560         tree->opcode = OP_FBNE_UN;
 561         mono_bblock_add_inst (s->cbb, tree);
 562 }
 563
 564 stmt: CEE_BEQ (fpcflags) {
 565         tree->opcode = OP_FBEQ;
 566         mono_bblock_add_inst (s->cbb, tree);
 567 }
 568
 569 stmt: CEE_BLT (fpcflags) {
 570         tree->opcode = OP_FBLT;
 571         mono_bblock_add_inst (s->cbb, tree);
 572 }
 573
 574 stmt: CEE_BLT_UN (fpcflags) {
 575         tree->opcode = OP_FBLT_UN;
 576         mono_bblock_add_inst (s->cbb, tree);
 577 }
 578
 579 stmt: CEE_BGT (fpcflags) {
 580         tree->opcode = OP_FBGT;
 581         mono_bblock_add_inst (s->cbb, tree);
 582 }
 583
 584 stmt: CEE_BGT_UN (fpcflags) {
 585         tree->opcode = OP_FBGT_UN;
 586         mono_bblock_add_inst (s->cbb, tree);
 587 }
 588
 589 stmt: CEE_BGE  (fpcflags) {
 590         tree->opcode = OP_FBGE;
 591         mono_bblock_add_inst (s->cbb, tree);
 592 }
 593
 594 stmt: CEE_BGE_UN (fpcflags) {
 595         tree->opcode = OP_FBGE_UN;
 596         mono_bblock_add_inst (s->cbb, tree);
 597 }
 598
 599 stmt: CEE_BLE  (fpcflags) {
 600         tree->opcode = OP_FBLE;
 601         mono_bblock_add_inst (s->cbb, tree);
 602 }
 603
 604 stmt: CEE_BLE_UN (fpcflags) {
 605         tree->opcode = OP_FBLE_UN;
 606         mono_bblock_add_inst (s->cbb, tree);
 607 }
 608
 609 stmt: CEE_POP (freg) "0" {
 610         /* we need to pop the value from the x86 FP stack */
 611         MONO_EMIT_UNALU (s, tree, OP_X86_FPOP, -1, state->left->reg1);
 612 }
 613
 614 # override the rules in inssel-float.brg that work for machines with FP registers
 615
 616 freg: OP_FCONV_TO_R8 (freg) "0" {
 617         /* nothing to do */
 618 }
 619
 620 freg: OP_FCONV_TO_R4 (freg) "0" {
 621         /* fixme: nothing to do ??*/
 622 }
 623
 624 reg: CEE_ADD(reg, CEE_LDIND_I4 (base)) {
 625         MonoInst *base = state->right->left->tree;
 626
 627         tree->dreg = state->reg1;
 628         tree->sreg1 = state->left->reg1;
 629         tree->sreg2 = base->inst_basereg;
 630         tree->inst_offset = base->inst_offset;
 631         tree->opcode = OP_X86_ADD_MEMBASE;
 632         mono_bblock_add_inst (s->cbb, tree);
 633 }
 634
 635 reg: CEE_SUB(reg, CEE_LDIND_I4 (base)) {
 636         MonoInst *base = state->right->left->tree;
 637
 638         tree->dreg = state->reg1;
 639         tree->sreg1 = state->left->reg1;
 640         tree->sreg2 = base->inst_basereg;
 641         tree->inst_offset = base->inst_offset;
 642         tree->opcode = OP_X86_SUB_MEMBASE;
 643         mono_bblock_add_inst (s->cbb, tree);
 644 }
 645
 646 reg: CEE_MUL(reg, CEE_LDIND_I4 (base)) {
 647         MonoInst *base = state->right->left->tree;
 648
 649         tree->dreg = state->reg1;
 650         tree->sreg1 = state->left->reg1;
 651         tree->sreg2 = base->inst_basereg;
 652         tree->inst_offset = base->inst_offset;
 653         tree->opcode = OP_X86_MUL_MEMBASE;
 654         mono_bblock_add_inst (s->cbb, tree);
 655 }
 656
 657 lreg: OP_LSHL (lreg, reg) "0" {
 658         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 659 }
 660
 661 lreg: OP_LSHL (lreg, OP_ICONST) "0" {
 662         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHL_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 663 }
 664
 665 lreg: OP_LSHR (lreg, reg) "0" {
 666         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 667 }
 668
 669 lreg: OP_LSHR (lreg, OP_ICONST) "0" {
 670         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 671 }
 672
 673 lreg: OP_LSHR_UN (lreg, reg) "0" {
 674         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 675 }
 676
 677 lreg: OP_LSHR_UN (lreg, OP_ICONST) "0" {
 678         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_UN_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 679 }
 680 %%