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_REF (base), reg),
 120 cflags: OP_COMPARE (CEE_LDIND_I (base), reg),
 121 cflags: OP_COMPARE (CEE_LDIND_I4 (base), reg),
 122 cflags: OP_COMPARE (CEE_LDIND_U4 (base), reg) {
 123         tree->opcode = OP_X86_COMPARE_MEMBASE_REG;
 124         tree->inst_basereg = state->left->left->tree->inst_basereg;
 125         tree->inst_offset = state->left->left->tree->inst_offset;
 126         tree->sreg2 = state->right->reg1;
 127         mono_bblock_add_inst (s->cbb, tree);
 128 }
 129
 130 cflags: OP_COMPARE (CEE_LDIND_REF (base), OP_ICONST),
 131 cflags: OP_COMPARE (CEE_LDIND_I (base), OP_ICONST),
 132 cflags: OP_COMPARE (CEE_LDIND_I4 (base), OP_ICONST),
 133 cflags: OP_COMPARE (CEE_LDIND_U4 (base), OP_ICONST) {
 134         tree->opcode = OP_X86_COMPARE_MEMBASE_IMM;
 135         tree->inst_basereg = state->left->left->tree->inst_basereg;
 136         tree->inst_offset = state->left->left->tree->inst_offset;
 137         tree->inst_imm = state->right->tree->inst_c0;
 138         mono_bblock_add_inst (s->cbb, tree);
 139 }
 140
 141 cflags: OP_COMPARE (reg, CEE_LDIND_REF (base)),
 142 cflags: OP_COMPARE (reg, CEE_LDIND_I (base)),
 143 cflags: OP_COMPARE (reg, CEE_LDIND_I4 (base)),
 144 cflags: OP_COMPARE (reg, CEE_LDIND_U4 (base)) {
 145         tree->opcode = OP_X86_COMPARE_REG_MEMBASE;
 146         tree->sreg2 = state->right->left->tree->inst_basereg;
 147         tree->inst_offset = state->right->left->tree->inst_offset;
 148         tree->sreg1 = state->left->reg1;
 149         mono_bblock_add_inst (s->cbb, tree);
 150 }
 151
 152 cflags : OP_CEQ (OP_COMPARE (OP_CEQ (cflags), OP_ICONST)) {
 153         tree->opcode = OP_CNE;
 154         tree->dreg = state->reg1;
 155         mono_bblock_add_inst (s->cbb, tree);
 156 } cost {
 157         MBCOND (!state->left->right->tree->inst_c0);
 158         return 1;
 159 }
 160
 161 stmt: CEE_STIND_I1 (base, OP_CEQ (OP_COMPARE (OP_CEQ (cflags), OP_ICONST))) {
 162         tree->opcode = OP_X86_SETNE_MEMBASE;
 163         tree->inst_offset = state->left->tree->inst_offset;
 164         tree->inst_basereg = state->left->tree->inst_basereg;
 165         mono_bblock_add_inst (s->cbb, tree);
 166 } cost {
 167         MBCOND (!state->right->left->right->tree->inst_c0);
 168         return 1;
 169 }
 170
 171 stmt: CEE_STIND_I1 (base, OP_CEQ (cflags)) {
 172         tree->opcode = OP_X86_SETEQ_MEMBASE;
 173         tree->inst_offset = state->left->tree->inst_offset;
 174         tree->inst_basereg = state->left->tree->inst_basereg;
 175         mono_bblock_add_inst (s->cbb, tree);
 176 }
 177
 178 reg: OP_LOCALLOC (OP_ICONST) {
 179         if (tree->flags & MONO_INST_INIT) {
 180                 /* microcoded in mini-x86.c */
 181                 tree->sreg1 = mono_regstate_next_int (s->rs);
 182                 MONO_EMIT_NEW_ICONST (s, tree->sreg1, state->left->tree->inst_c0);
 183                 mono_bblock_add_inst (s->cbb, tree);
 184         } else {
 185                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, state->left->tree->inst_c0);
 186                 MONO_EMIT_UNALU (s, tree, OP_MOVE, state->reg1, X86_ESP);
 187         }
 188 }
 189
 190 reg: OP_LOCALLOC (reg) {
 191         tree->sreg1 = state->left->tree->dreg;
 192         mono_bblock_add_inst (s->cbb, tree);
 193 }
 194
 195 stmt: OP_SETRET (reg) {
 196         tree->opcode = OP_MOVE;
 197         tree->sreg1 = state->left->reg1;
 198         tree->dreg = X86_EAX;
 199         mono_bblock_add_inst (s->cbb, tree);
 200 }
 201
 202 stmt: OP_SETRET (lreg) {
 203         MONO_EMIT_NEW_UNALU (s, OP_MOVE, X86_EDX, state->left->reg2);
 204         tree->opcode = OP_MOVE;
 205         tree->sreg1 = state->left->reg1;
 206         tree->dreg = X86_EAX;
 207         mono_bblock_add_inst (s->cbb, tree);
 208 }
 209
 210 stmt: OP_SETRET (CEE_LDIND_REF (OP_REGVAR)),
 211 stmt: OP_SETRET (CEE_LDIND_I (OP_REGVAR)),
 212 stmt: OP_SETRET (CEE_LDIND_I4 (OP_REGVAR)),
 213 stmt: OP_SETRET (CEE_LDIND_U4 (OP_REGVAR)) {
 214         tree->opcode = OP_MOVE;
 215         tree->sreg1 = state->left->left->tree->dreg;
 216         tree->dreg = X86_EAX;
 217         mono_bblock_add_inst (s->cbb, tree);
 218 }
 219
 220 stmt: OP_SETRET (freg) {
 221         /* nothing to do */
 222 }
 223
 224 stmt: OP_SETRET (OP_ICONST) {
 225         tree->opcode = OP_ICONST;
 226         tree->inst_c0 = state->left->tree->inst_c0;
 227         tree->dreg = X86_EAX;
 228         mono_bblock_add_inst (s->cbb, tree);
 229 }
 230
 231 stmt: OP_OUTARG (reg) {
 232         tree->opcode = OP_X86_PUSH;
 233         tree->sreg1 = state->left->reg1;
 234         mono_bblock_add_inst (s->cbb, tree);
 235 }
 236
 237 # we need to reduce this code duplication with some burg syntax extension
 238 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 239         tree->opcode = OP_X86_PUSH;
 240         tree->sreg1 = state->left->left->tree->dreg;
 241         mono_bblock_add_inst (s->cbb, tree);
 242 }
 243
 244 stmt: OP_OUTARG (CEE_LDIND_I4 (OP_REGVAR)) {
 245         tree->opcode = OP_X86_PUSH;
 246         tree->sreg1 = state->left->left->tree->dreg;
 247         mono_bblock_add_inst (s->cbb, tree);
 248 }
 249
 250 stmt: OP_OUTARG (CEE_LDIND_U4 (OP_REGVAR)) {
 251         tree->opcode = OP_X86_PUSH;
 252         tree->sreg1 = state->left->left->tree->dreg;
 253         mono_bblock_add_inst (s->cbb, tree);
 254 }
 255
 256 stmt: OP_OUTARG (CEE_LDIND_I (OP_REGVAR)) {
 257         tree->opcode = OP_X86_PUSH;
 258         tree->sreg1 = state->left->left->tree->dreg;
 259         mono_bblock_add_inst (s->cbb, tree);
 260 }
 261
 262 stmt: OP_OUTARG (lreg) {
 263         MONO_EMIT_NEW_UNALU (s, OP_X86_PUSH, -1, state->left->reg2);
 264         tree->opcode = OP_X86_PUSH;
 265         tree->sreg1 = state->left->reg1;
 266         mono_bblock_add_inst (s->cbb, tree);
 267 }
 268
 269 stmt: OP_OUTARG (CEE_LDIND_I8 (base)) {
 270         MonoInst *ins;
 271         ins = mono_mempool_alloc0 (s->mempool, sizeof (MonoInst));
 272         ins->opcode = OP_X86_PUSH_MEMBASE;
 273         ins->inst_basereg = state->left->left->tree->inst_basereg;
 274         ins->inst_offset = state->left->left->tree->inst_offset + 4;
 275         mono_bblock_add_inst (s->cbb, ins);
 276
 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 (OP_ICONST) {
 284         tree->opcode = OP_X86_PUSH_IMM;
 285         tree->inst_imm = state->left->tree->inst_c0;
 286         mono_bblock_add_inst (s->cbb, tree);
 287 }
 288
 289 stmt: OP_OUTARG (CEE_LDIND_I4 (base)) {
 290         tree->opcode = OP_X86_PUSH_MEMBASE;
 291         tree->inst_basereg = state->left->left->tree->inst_basereg;
 292         tree->inst_offset = state->left->left->tree->inst_offset;
 293         mono_bblock_add_inst (s->cbb, tree);
 294 }
 295
 296 stmt: OP_OUTARG (CEE_LDIND_U4 (base)) {
 297         tree->opcode = OP_X86_PUSH_MEMBASE;
 298         tree->inst_basereg = state->left->left->tree->inst_basereg;
 299         tree->inst_offset = state->left->left->tree->inst_offset;
 300         mono_bblock_add_inst (s->cbb, tree);
 301 }
 302
 303 stmt: OP_OUTARG (CEE_LDIND_I (base)) {
 304         tree->opcode = OP_X86_PUSH_MEMBASE;
 305         tree->inst_basereg = state->left->left->tree->inst_basereg;
 306         tree->inst_offset = state->left->left->tree->inst_offset;
 307         mono_bblock_add_inst (s->cbb, tree);
 308 }
 309
 310 stmt: OP_OUTARG (CEE_LDIND_REF (base)) {
 311         tree->opcode = OP_X86_PUSH_MEMBASE;
 312         tree->inst_basereg = state->left->left->tree->inst_basereg;
 313         tree->inst_offset = state->left->left->tree->inst_offset;
 314         mono_bblock_add_inst (s->cbb, tree);
 315 }
 316
 317 stmt: OP_OUTARG (CEE_LDIND_REF (OP_REGVAR)) {
 318         tree->opcode = OP_X86_PUSH;
 319         tree->sreg1 = state->left->left->tree->dreg;
 320         mono_bblock_add_inst (s->cbb, tree);
 321 }
 322
 323 stmt: OP_OUTARG (CEE_LDOBJ (reg)) {
 324         tree->opcode = OP_X86_PUSH;
 325         tree->sreg1 = state->left->reg1;
 326         mono_bblock_add_inst (s->cbb, tree);
 327 }
 328
 329 stmt: OP_OUTARG (freg) {
 330         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 331         tree->opcode = OP_STORER8_MEMBASE_REG;
 332         tree->sreg1 = state->left->reg1;
 333         tree->inst_destbasereg = X86_ESP;
 334         tree->inst_offset = 0;
 335         mono_bblock_add_inst (s->cbb, tree);
 336 }
 337
 338 stmt: OP_OUTARG_R4 (freg) {
 339         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 4);
 340         tree->opcode = OP_STORER4_MEMBASE_REG;
 341         tree->sreg1 = state->left->reg1;
 342         tree->inst_destbasereg = X86_ESP;
 343         tree->inst_offset = 0;
 344         mono_bblock_add_inst (s->cbb, tree);
 345 }
 346
 347 stmt: OP_OUTARG_R8 (freg) {
 348         MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, 8);
 349         tree->opcode = OP_STORER8_MEMBASE_REG;
 350         tree->sreg1 = state->left->reg1;
 351         tree->inst_destbasereg = X86_ESP;
 352         tree->inst_offset = 0;
 353         mono_bblock_add_inst (s->cbb, tree);
 354 }
 355
 356 stmt: OP_OUTARG_VT (CEE_LDOBJ (base)) {
 357         MonoInst *vt = state->left->left->tree;
 358         //g_print ("vt size: %d at R%d + %d\n", tree->inst_imm, vt->inst_basereg, vt->inst_offset);
 359
 360         if (!tree->inst_imm)
 361                 return;
 362
 363         if (tree->inst_imm <= 4) {
 364                 tree->opcode = OP_X86_PUSH_MEMBASE;
 365                 tree->inst_basereg = vt->inst_basereg;
 366                 tree->inst_offset = vt->inst_offset;
 367                 mono_bblock_add_inst (s->cbb, tree);
 368         } else if (tree->inst_imm <= 20) {
 369                 int sz = tree->inst_imm;
 370                 sz += 3;
 371                 sz &= ~3;
 372                 MONO_EMIT_NEW_BIALU_IMM (s, OP_SUB_IMM, X86_ESP, X86_ESP, sz);
 373                 mini_emit_memcpy (s, X86_ESP, 0, vt->inst_basereg, vt->inst_offset, tree->inst_imm, 0);
 374         } else {
 375                 tree->opcode = OP_X86_PUSH_OBJ;
 376                 tree->inst_basereg = vt->inst_basereg;
 377                 tree->inst_offset = vt->inst_offset;
 378                 mono_bblock_add_inst (s->cbb, tree);
 379         }
 380 }
 381
 382 stmt: OP_OUTARG_VT (OP_ICONST) {
 383         tree->opcode = OP_X86_PUSH_IMM;
 384         tree->inst_imm = state->left->tree->inst_c0;
 385         mono_bblock_add_inst (s->cbb, tree);
 386 }
 387
 388 stmt: OP_OUTARG_VT (reg) {
 389         tree->opcode = OP_X86_PUSH;
 390         tree->sreg1 = state->left->tree->dreg;
 391         mono_bblock_add_inst (s->cbb, tree);
 392 }
 393
 394 reg: OP_LDADDR (OP_REGOFFSET) "1" {
 395         if (state->left->tree->inst_offset) {
 396                 tree->opcode = OP_X86_LEA_MEMBASE;
 397                 tree->sreg1 = state->left->tree->inst_basereg;
 398                 tree->inst_imm = state->left->tree->inst_offset;
 399                 tree->dreg = state->reg1;
 400         } else {
 401                 tree->opcode = OP_MOVE;
 402                 tree->sreg1 = state->left->tree->inst_basereg;
 403                 tree->dreg = state->reg1;
 404         }
 405         mono_bblock_add_inst (s->cbb, tree);
 406 }
 407
 408 reg: CEE_LDOBJ (OP_REGOFFSET) "1" {
 409         if (state->left->tree->inst_offset) {
 410                 tree->opcode = OP_X86_LEA_MEMBASE;
 411                 tree->sreg1 = state->left->tree->inst_basereg;
 412                 tree->inst_imm = state->left->tree->inst_offset;
 413                 tree->dreg = state->reg1;
 414         } else {
 415                 tree->opcode = OP_MOVE;
 416                 tree->sreg1 = state->left->tree->inst_basereg;
 417                 tree->dreg = state->reg1;
 418         }
 419         mono_bblock_add_inst (s->cbb, tree);
 420 }
 421
 422 reg: CEE_LDELEMA (reg, reg) "15" {
 423         guint32 size = mono_class_array_element_size (tree->klass);
 424
 425         MONO_EMIT_BOUNDS_CHECK (s, state->left->reg1, MonoArray, max_length, state->right->reg1);
 426
 427         if (size == 1 || size == 2 || size == 4 || size == 8) {
 428                 static const int fast_log2 [] = { 1, 0, 1, -1, 2, -1, -1, -1, 3 };
 429                 tree->opcode = OP_X86_LEA;
 430                 tree->dreg = state->reg1;
 431                 tree->sreg1 = state->left->reg1;
 432                 tree->sreg2 = state->right->reg1;
 433                 tree->inst_imm = G_STRUCT_OFFSET (MonoArray, vector);
 434                 tree->unused = fast_log2 [size];
 435                 mono_bblock_add_inst (s->cbb, tree);
 436         } else {
 437                 int mult_reg = mono_regstate_next_int (s->rs);
 438                 int add_reg = mono_regstate_next_int (s->rs);
 439                 MONO_EMIT_NEW_BIALU_IMM (s, OP_MUL_IMM, mult_reg, state->right->reg1, size);
 440                 MONO_EMIT_NEW_BIALU (s, CEE_ADD, add_reg, mult_reg, state->left->reg1);
 441                 MONO_EMIT_NEW_BIALU_IMM (s, OP_ADD_IMM, state->reg1, add_reg, G_STRUCT_OFFSET (MonoArray, vector));
 442         }
 443 }
 444
 445 stmt: CEE_STIND_R8 (OP_REGVAR, freg) {
 446         /* nothing to do: the value is already on the FP stack */
 447 }
 448
 449 stmt: CEE_STIND_I4 (base, CEE_ADD (CEE_LDIND_I4 (base), OP_ICONST)) {
 450         int con = state->right->right->tree->inst_c0;
 451
 452         if (con == 1) {
 453                 tree->opcode = OP_X86_INC_MEMBASE;
 454         } else {
 455                 tree->opcode = OP_X86_ADD_MEMBASE_IMM;
 456                 tree->inst_imm = con;
 457         }
 458
 459         tree->inst_basereg = state->left->tree->inst_basereg;
 460         tree->inst_offset = state->left->tree->inst_offset;
 461         mono_bblock_add_inst (s->cbb, tree);
 462 } cost {
 463         MBTREE_TYPE *t1 = state->right->left->left->tree;
 464         MBTREE_TYPE *t2 = state->left->tree;
 465         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 466                 t1->inst_offset == t2->inst_offset);
 467         return 2;
 468 }
 469
 470 stmt: CEE_STIND_I4 (base, CEE_SUB (CEE_LDIND_I4 (base), OP_ICONST)) {
 471         int con = state->right->right->tree->inst_c0;
 472
 473         if (con == 1) {
 474                 tree->opcode = OP_X86_DEC_MEMBASE;
 475         } else {
 476                 tree->opcode = OP_X86_SUB_MEMBASE_IMM;
 477                 tree->inst_imm = con;
 478         }
 479
 480         tree->inst_basereg = state->left->tree->inst_basereg;
 481         tree->inst_offset = state->left->tree->inst_offset;
 482         mono_bblock_add_inst (s->cbb, tree);
 483 } cost {
 484         MBTREE_TYPE *t1 = state->right->left->left->tree;
 485         MBTREE_TYPE *t2 = state->left->tree;
 486         MBCOND (t1->inst_basereg == t2->inst_basereg &&
 487                 t1->inst_offset == t2->inst_offset);
 488         return 2;
 489 }
 490
 491 #
 492 # this rules is incorrect, it needs to do an indirect inc (inc_membase)
 493 #stmt: CEE_STIND_I4 (reg, CEE_ADD (reg, OP_ICONST)) {
 494 #       tree->opcode = OP_X86_INC_REG;
 495 #       tree->dreg = state->left->reg1;
 496 #       mono_bblock_add_inst (s->cbb, tree);
 497 #} cost {
 498 #       MBState *s1 = state->left;
 499 #       MBState *s2 = state->right->left;
 500 #       int con = state->right->right->tree->inst_c0;
 501 #       MBCOND (con == 1 && s1->reg1 == s2->reg1);
 502 #       return 1;
 503 #}
 504
 505 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_SUB (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 506         int con = state->right->right->tree->inst_c0;
 507         int dreg = state->left->tree->dreg;
 508         int sreg = state->right->left->left->tree->dreg;
 509
 510         if (con == 1) {
 511                 if (dreg != sreg)
 512                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 513                 tree->opcode = OP_X86_DEC_REG;
 514                 tree->dreg = tree->sreg1 = dreg;
 515         } else if (con == -1) {
 516                 if (dreg != sreg)
 517                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 518                 tree->opcode = OP_X86_INC_REG;
 519                 tree->dreg = tree->sreg1 = dreg;
 520         } else {
 521                 tree->opcode = OP_SUB_IMM;
 522                 tree->inst_imm = con;
 523                 tree->sreg1 = sreg;
 524                 tree->dreg = dreg;
 525         }
 526         mono_bblock_add_inst (s->cbb, tree);
 527 }
 528
 529 stmt: CEE_STIND_I (OP_REGVAR, CEE_ADD (CEE_LDIND_I (OP_REGVAR), OP_ICONST)),
 530 stmt: CEE_STIND_I4 (OP_REGVAR, CEE_ADD (CEE_LDIND_I4 (OP_REGVAR), OP_ICONST)) {
 531         int con = state->right->right->tree->inst_c0;
 532         int dreg = state->left->tree->dreg;
 533         int sreg = state->right->left->left->tree->dreg;
 534
 535         if (con == 1) {
 536                 if (dreg != sreg)
 537                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 538                 tree->opcode = OP_X86_INC_REG;
 539                 tree->dreg = tree->sreg1 = dreg;
 540         } else if (con == -1) {
 541                 if (dreg != sreg)
 542                         MONO_EMIT_NEW_UNALU (s, OP_MOVE, dreg, sreg);
 543                 tree->opcode = OP_X86_DEC_REG;
 544                 tree->dreg = tree->sreg1 = dreg;
 545         } else {
 546                 tree->opcode = OP_ADD_IMM;
 547                 tree->inst_imm = con;
 548                 tree->sreg1 = sreg;
 549                 tree->dreg = dreg;
 550         }
 551         mono_bblock_add_inst (s->cbb, tree);
 552 }
 553
 554 reg: CEE_LDIND_I2 (OP_REGVAR) {
 555         MONO_EMIT_UNALU (s, tree, OP_SEXT_I2, state->reg1, state->left->tree->dreg);
 556 }
 557
 558 # on x86, fp compare overwrites EAX, so we must
 559 # either improve the local register allocator or
 560 # emit coarse opcodes which saves EAX for us.
 561
 562 reg: OP_CEQ (OP_COMPARE (freg, freg)) {
 563         MONO_EMIT_BIALU (s, tree, OP_FCEQ, state->reg1, state->left->left->reg1,
 564                          state->left->right->reg1);
 565 }
 566
 567 reg: OP_CLT (OP_COMPARE (freg, freg)) {
 568         MONO_EMIT_BIALU (s, tree, OP_FCLT, state->reg1, state->left->left->reg1,
 569                          state->left->right->reg1);
 570 }
 571
 572 reg: OP_CLT_UN (OP_COMPARE (freg, freg)) {
 573         MONO_EMIT_BIALU (s, tree, OP_FCLT_UN, state->reg1, state->left->left->reg1,
 574                          state->left->right->reg1);
 575 }
 576
 577 reg: OP_CGT (OP_COMPARE (freg, freg)) {
 578         MONO_EMIT_BIALU (s, tree, OP_FCGT, state->reg1, state->left->left->reg1,
 579                          state->left->right->reg1);
 580 }
 581
 582 reg: OP_CGT_UN (OP_COMPARE (freg, freg)) {
 583         MONO_EMIT_BIALU (s, tree, OP_FCGT_UN, state->reg1, state->left->left->reg1,
 584                          state->left->right->reg1);
 585 }
 586
 587 # fpcflags overwrites EAX, but this does not matter for statements
 588 # because we are the last operation in the tree.
 589
 590 stmt: CEE_BNE_UN (fpcflags) {
 591         tree->opcode = OP_FBNE_UN;
 592         mono_bblock_add_inst (s->cbb, tree);
 593 }
 594
 595 stmt: CEE_BEQ (fpcflags) {
 596         tree->opcode = OP_FBEQ;
 597         mono_bblock_add_inst (s->cbb, tree);
 598 }
 599
 600 stmt: CEE_BLT (fpcflags) {
 601         tree->opcode = OP_FBLT;
 602         mono_bblock_add_inst (s->cbb, tree);
 603 }
 604
 605 stmt: CEE_BLT_UN (fpcflags) {
 606         tree->opcode = OP_FBLT_UN;
 607         mono_bblock_add_inst (s->cbb, tree);
 608 }
 609
 610 stmt: CEE_BGT (fpcflags) {
 611         tree->opcode = OP_FBGT;
 612         mono_bblock_add_inst (s->cbb, tree);
 613 }
 614
 615 stmt: CEE_BGT_UN (fpcflags) {
 616         tree->opcode = OP_FBGT_UN;
 617         mono_bblock_add_inst (s->cbb, tree);
 618 }
 619
 620 stmt: CEE_BGE  (fpcflags) {
 621         tree->opcode = OP_FBGE;
 622         mono_bblock_add_inst (s->cbb, tree);
 623 }
 624
 625 stmt: CEE_BGE_UN (fpcflags) {
 626         tree->opcode = OP_FBGE_UN;
 627         mono_bblock_add_inst (s->cbb, tree);
 628 }
 629
 630 stmt: CEE_BLE  (fpcflags) {
 631         tree->opcode = OP_FBLE;
 632         mono_bblock_add_inst (s->cbb, tree);
 633 }
 634
 635 stmt: CEE_BLE_UN (fpcflags) {
 636         tree->opcode = OP_FBLE_UN;
 637         mono_bblock_add_inst (s->cbb, tree);
 638 }
 639
 640 stmt: CEE_POP (freg) "0" {
 641         /* we need to pop the value from the x86 FP stack */
 642         MONO_EMIT_UNALU (s, tree, OP_X86_FPOP, -1, state->left->reg1);
 643 }
 644
 645 # override the rules in inssel-float.brg that work for machines with FP registers
 646
 647 freg: OP_FCONV_TO_R8 (freg) "0" {
 648         /* nothing to do */
 649 }
 650
 651 freg: OP_FCONV_TO_R4 (freg) "0" {
 652         /* fixme: nothing to do ??*/
 653 }
 654
 655 reg: CEE_ADD(reg, CEE_LDIND_I4 (base)) {
 656         MonoInst *base = state->right->left->tree;
 657
 658         tree->dreg = state->reg1;
 659         tree->sreg1 = state->left->reg1;
 660         tree->sreg2 = base->inst_basereg;
 661         tree->inst_offset = base->inst_offset;
 662         tree->opcode = OP_X86_ADD_MEMBASE;
 663         mono_bblock_add_inst (s->cbb, tree);
 664 }
 665
 666 reg: CEE_SUB(reg, CEE_LDIND_I4 (base)) {
 667         MonoInst *base = state->right->left->tree;
 668
 669         tree->dreg = state->reg1;
 670         tree->sreg1 = state->left->reg1;
 671         tree->sreg2 = base->inst_basereg;
 672         tree->inst_offset = base->inst_offset;
 673         tree->opcode = OP_X86_SUB_MEMBASE;
 674         mono_bblock_add_inst (s->cbb, tree);
 675 }
 676
 677 reg: CEE_MUL(reg, CEE_LDIND_I4 (base)) {
 678         MonoInst *base = state->right->left->tree;
 679
 680         tree->dreg = state->reg1;
 681         tree->sreg1 = state->left->reg1;
 682         tree->sreg2 = base->inst_basereg;
 683         tree->inst_offset = base->inst_offset;
 684         tree->opcode = OP_X86_MUL_MEMBASE;
 685         mono_bblock_add_inst (s->cbb, tree);
 686 }
 687
 688 lreg: OP_LSHL (lreg, reg) "0" {
 689         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 690 }
 691
 692 lreg: OP_LSHL (lreg, OP_ICONST) "0" {
 693         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHL_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 694 }
 695
 696 lreg: OP_LSHR (lreg, reg) "0" {
 697         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 698 }
 699
 700 lreg: OP_LSHR (lreg, OP_ICONST) "0" {
 701         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 702 }
 703
 704 lreg: OP_LSHR_UN (lreg, reg) "0" {
 705         MONO_EMIT_BIALU (s, tree, tree->opcode, state->reg1, state->left->reg1, state->right->reg1);
 706 }
 707
 708 lreg: OP_LSHR_UN (lreg, OP_ICONST) "0" {
 709         MONO_EMIT_BIALU_IMM (s, tree, OP_LSHR_UN_IMM, state->reg1, state->left->reg1, state->right->tree->inst_c0);
 710 }
 711 %%