mono/mini/mini-native-types.c

   1 /**
   2  * \file
   3  * intrinsics for variable sized int/floats
   4  *
   5  * Author:
   6  *   Rodrigo Kumpera (kumpera@gmail.com)
   7  *
   8  * (C) 2013 Xamarin
   9  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  10  */
  11
  12 #include <config.h>
  13 #include <stdio.h>
  14
  15 #include "mini.h"
  16 #include "ir-emit.h"
  17 #include "glib.h"
  18
  19
  20 typedef struct {
  21         const char *op_name;
  22         short op_table[4];
  23 } IntIntrisic;
  24
  25 typedef struct {
  26         short op_index;
  27 #ifdef __cplusplus
  28         MonoStackType big_stack_type : 16;
  29         MonoStackType small_stack_type : 16;
  30         MonoStackType stack_type : 16;
  31 #else
  32         short big_stack_type;
  33         short small_stack_type;
  34         short stack_type;
  35 #endif
  36         short conv_4_to_8;
  37         short conv_8_to_4;
  38         short move;
  39         short inc_op;
  40         short dec_op;
  41         short store_op;
  42         short compare_op;
  43 } MagicTypeInfo;
  44
  45
  46 #if TARGET_SIZEOF_VOID_P == 8
  47 #define OP_PT_ADD OP_LADD
  48 #define OP_PT_SUB OP_LSUB
  49 #define OP_PT_MUL OP_LMUL
  50 #define OP_PT_DIV OP_LDIV
  51 #define OP_PT_REM OP_LREM
  52 #define OP_PT_NEG OP_LNEG
  53 #define OP_PT_AND OP_LAND
  54 #define OP_PT_OR OP_LOR
  55 #define OP_PT_XOR OP_LXOR
  56 #define OP_PT_NOT OP_LNOT
  57 #define OP_PT_SHL OP_LSHL
  58 #define OP_PT_SHR OP_LSHR
  59
  60 #define OP_PT_DIV_UN OP_LDIV_UN
  61 #define OP_PT_REM_UN OP_LREM_UN
  62 #define OP_PT_SHR_UN OP_LSHR_UN
  63
  64 #define OP_PT_ADD_IMM OP_LADD_IMM
  65 #define OP_PT_SUB_IMM OP_LSUB_IMM
  66
  67 #define OP_PT_STORE_FP_MEMBASE_REG OP_STORER8_MEMBASE_REG
  68
  69 #define OP_PCOMPARE OP_LCOMPARE
  70
  71 #else
  72 #define OP_PT_ADD OP_IADD
  73 #define OP_PT_SUB OP_ISUB
  74 #define OP_PT_MUL OP_IMUL
  75 #define OP_PT_DIV OP_IDIV
  76 #define OP_PT_REM OP_IREM
  77 #define OP_PT_NEG OP_INEG
  78 #define OP_PT_AND OP_IAND
  79 #define OP_PT_OR OP_IOR
  80 #define OP_PT_XOR OP_IXOR
  81 #define OP_PT_NOT OP_INOT
  82 #define OP_PT_SHL OP_ISHL
  83 #define OP_PT_SHR OP_ISHR
  84
  85 #define OP_PT_DIV_UN OP_IDIV_UN
  86 #define OP_PT_REM_UN OP_IREM_UN
  87 #define OP_PT_SHR_UN OP_ISHR_UN
  88
  89 #define OP_PT_ADD_IMM OP_IADD_IMM
  90 #define OP_PT_SUB_IMM OP_ISUB_IMM
  91
  92 #define OP_PT_STORE_FP_MEMBASE_REG OP_STORER4_MEMBASE_REG
  93
  94 #define OP_PCOMPARE OP_ICOMPARE
  95
  96 #endif
  97
  98 gsize
  99 mini_magic_type_size (MonoCompile *cfg, MonoType *type)
 100 {
 101         if (type->type == MONO_TYPE_I4 || type->type == MONO_TYPE_U4)
 102                 return 4;
 103         else if (type->type == MONO_TYPE_I8 || type->type == MONO_TYPE_U8)
 104                 return 8;
 105         else if (type->type == MONO_TYPE_R4 && !type->byref && (!cfg || cfg->r4fp))
 106                 return 4;
 107         else if (type->type == MONO_TYPE_R8 && !type->byref)
 108                 return 8;
 109         return TARGET_SIZEOF_VOID_P;
 110 }
 111
 112 #ifndef DISABLE_JIT
 113
 114 static const IntIntrisic int_binop[] = {
 115         { "op_Addition", { OP_PT_ADD, OP_PT_ADD, OP_FADD, OP_RADD } },
 116         { "op_Subtraction", { OP_PT_SUB, OP_PT_SUB, OP_FSUB, OP_RSUB } },
 117         { "op_Multiply", { OP_PT_MUL, OP_PT_MUL, OP_FMUL, OP_RMUL } },
 118         { "op_Division", { OP_PT_DIV, OP_PT_DIV_UN, OP_FDIV, OP_RDIV } },
 119         { "op_Modulus", { OP_PT_REM, OP_PT_REM_UN, OP_FREM, OP_RREM } },
 120         { "op_BitwiseAnd", { OP_PT_AND, OP_PT_AND } },
 121         { "op_BitwiseOr", { OP_PT_OR, OP_PT_OR } },
 122         { "op_ExclusiveOr", { OP_PT_XOR, OP_PT_XOR } },
 123         { "op_LeftShift", { OP_PT_SHL, OP_PT_SHL } },
 124         { "op_RightShift", { OP_PT_SHR, OP_PT_SHR_UN } },
 125 };
 126
 127 static const IntIntrisic int_unnop[] = {
 128         { "op_UnaryPlus", { OP_MOVE, OP_MOVE, OP_FMOVE, OP_RMOVE } },
 129         { "op_UnaryNegation", { OP_PT_NEG, OP_PT_NEG, OP_FNEG, OP_RNEG } },
 130         { "op_OnesComplement", { OP_PT_NOT, OP_PT_NOT, OP_FNOT, OP_RNOT } },
 131 };
 132
 133 static const IntIntrisic int_cmpop[] = {
 134         { "op_Inequality", { OP_ICNEQ, OP_ICNEQ, OP_FCNEQ, OP_RCNEQ } },
 135         { "op_Equality", { OP_ICEQ, OP_ICEQ, OP_FCEQ, OP_RCEQ } },
 136         { "op_GreaterThan", { OP_ICGT, OP_ICGT_UN, OP_FCGT, OP_RCGT } },
 137         { "op_GreaterThanOrEqual", { OP_ICGE, OP_ICGE_UN, OP_FCLT_UN, OP_RCLT_UN } },
 138         { "op_LessThan", { OP_ICLT, OP_ICLT_UN, OP_FCLT, OP_RCLT } },
 139         { "op_LessThanOrEqual", { OP_ICLE, OP_ICLE_UN, OP_FCGT_UN, OP_RCGT_UN } },
 140 };
 141
 142 static const MagicTypeInfo type_info[] = {
 143         //nint
 144         { 0, STACK_I8, STACK_I4, STACK_PTR, OP_ICONV_TO_I8, OP_LCONV_TO_I4, OP_MOVE, OP_PT_ADD_IMM, OP_PT_SUB_IMM, OP_STORE_MEMBASE_REG, OP_PCOMPARE },
 145         //nuint
 146         { 1, STACK_I8, STACK_I4, STACK_PTR, OP_ICONV_TO_U8, OP_LCONV_TO_U4, OP_MOVE, OP_PT_ADD_IMM, OP_PT_SUB_IMM, OP_STORE_MEMBASE_REG, OP_PCOMPARE },
 147         //nfloat
 148         { 2, STACK_R8, STACK_R8, STACK_R8, OP_FCONV_TO_R8, OP_FCONV_TO_R4, OP_FMOVE, 0, 0, OP_PT_STORE_FP_MEMBASE_REG, 0 },
 149 };
 150
 151 static MonoInst*
 152 emit_narrow (MonoCompile *cfg, const MagicTypeInfo *info, int sreg)
 153 {
 154         MonoInst *ins;
 155
 156         MONO_INST_NEW (cfg, ins, info->conv_8_to_4);
 157         ins->sreg1 = sreg;
 158         if (info->conv_8_to_4 == OP_FCONV_TO_R4)
 159                 ins->type = cfg->r4_stack_type;
 160         else
 161                 ins->type = info->small_stack_type;
 162         ins->dreg = alloc_dreg (cfg, (MonoStackType)ins->type);
 163         MONO_ADD_INS (cfg->cbb, ins);
 164         return mono_decompose_opcode (cfg, ins);
 165 }
 166
 167 static MonoInst*
 168 emit_widen (MonoCompile *cfg, const MagicTypeInfo *info, int sreg)
 169 {
 170         MonoInst *ins;
 171
 172         if (cfg->r4fp && info->conv_4_to_8 == OP_FCONV_TO_R8)
 173                 MONO_INST_NEW (cfg, ins, OP_RCONV_TO_R8);
 174         else
 175                 MONO_INST_NEW (cfg, ins, info->conv_4_to_8);
 176         ins->sreg1 = sreg;
 177         ins->type = info->big_stack_type;
 178         ins->dreg = alloc_dreg (cfg, info->big_stack_type);
 179         MONO_ADD_INS (cfg->cbb, ins);
 180         return mono_decompose_opcode (cfg, ins);
 181 }
 182
 183 static MonoInst*
 184 emit_intrinsics (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args, const MagicTypeInfo *info)
 185 {
 186         int i = 0;
 187         const char *name = cmethod->name;
 188         MonoInst *ins;
 189         int type_index;
 190         MonoStackType stack_type;
 191
 192         if (info->op_index == 2 && cfg->r4fp && TARGET_SIZEOF_VOID_P == 4) {
 193                 type_index = 3;
 194                 stack_type = STACK_R4;
 195         } else {
 196                 type_index = info->op_index;
 197                 stack_type = info->stack_type;
 198         }
 199
 200         if (!strcmp ("op_Implicit", name) || !strcmp ("op_Explicit", name)) {
 201                 int source_size = mini_magic_type_size (cfg, fsig->params [0]);
 202                 int dest_size = mini_magic_type_size (cfg, fsig->ret);
 203
 204                 switch (info->big_stack_type) {
 205                 case STACK_I8:
 206                         if (!mini_magic_is_int_type (fsig->params [0]) || !mini_magic_is_int_type (fsig->ret))
 207                                 return NULL;
 208                         break;
 209                 case STACK_R8:
 210                         if (!mini_magic_is_float_type (fsig->params [0]) || !mini_magic_is_float_type (fsig->ret))
 211                                 return NULL;
 212                         break;
 213                 default:
 214                         g_assert_not_reached ();
 215                 }
 216
 217                 //4 -> 4 or 8 -> 8
 218                 if (source_size == dest_size)
 219                         return args [0];
 220
 221                 //4 -> 8
 222                 if (source_size < dest_size)
 223                         return emit_widen (cfg, info, args [0]->dreg);
 224
 225                 //8 -> 4
 226                 return emit_narrow (cfg, info, args [0]->dreg);
 227         }
 228
 229         if (!strcmp (".ctor", name)) {
 230                 gboolean is_ldaddr = args [0]->opcode == OP_LDADDR;
 231                 int arg0 = args [1]->dreg;
 232                 int arg_size = mini_magic_type_size (cfg, fsig->params [0]);
 233
 234                 if (arg_size > TARGET_SIZEOF_VOID_P) //8 -> 4
 235                         arg0 = emit_narrow (cfg, info, arg0)->dreg;
 236                 else if (arg_size < TARGET_SIZEOF_VOID_P) //4 -> 8
 237                         arg0 = emit_widen (cfg, info, arg0)->dreg;
 238
 239                 if (is_ldaddr) { /*Eliminate LDADDR if it's initing a local var*/
 240                         int dreg = ((MonoInst*)args [0]->inst_p0)->dreg;
 241                         NULLIFY_INS (args [0]);
 242                         EMIT_NEW_UNALU (cfg, ins, info->move, dreg, arg0);
 243                         cfg->has_indirection = TRUE;
 244                 } else {
 245                         EMIT_NEW_STORE_MEMBASE (cfg, ins, info->store_op, args [0]->dreg, 0, arg0);
 246                 }
 247                 return ins;
 248         }
 249
 250         if (!strcmp ("op_Increment", name) || !strcmp ("op_Decrement", name)) {
 251                 gboolean inc = !strcmp ("op_Increment", name);
 252                 /* FIXME float inc is too complex to bother with*/
 253                 //this is broken with ints too
 254                 // if (!info->inc_op)
 255                         return NULL;
 256
 257                 /* We have IR for inc/dec */
 258                 MONO_INST_NEW (cfg, ins, inc ? info->inc_op : info->dec_op);
 259                 ins->dreg = alloc_dreg (cfg, (MonoStackType)info->stack_type);
 260                 ins->sreg1 = args [0]->dreg;
 261                 ins->inst_imm = 1;
 262                 ins->type = info->stack_type;
 263                 MONO_ADD_INS (cfg->cbb, ins);
 264                 return ins;
 265         }
 266
 267         for (i = 0; i < sizeof (int_binop) / sizeof  (IntIntrisic); ++i) {
 268                 if (!strcmp (int_binop [i].op_name, name)) {
 269                         if (!int_binop [i].op_table [info->op_index])
 270                                 return NULL;
 271                         g_assert (int_binop [i].op_table [type_index]);
 272
 273                         MONO_INST_NEW (cfg, ins, int_binop [i].op_table [type_index]);
 274                         ins->dreg = alloc_dreg (cfg, stack_type);
 275                         ins->sreg1 = args [0]->dreg;
 276                 ins->sreg2 = args [1]->dreg;
 277                         ins->type = stack_type;
 278                         MONO_ADD_INS (cfg->cbb, ins);
 279                         return mono_decompose_opcode (cfg, ins);
 280                 }
 281         }
 282
 283         for (i = 0; i < sizeof (int_unnop) / sizeof  (IntIntrisic); ++i) {
 284                 if (!strcmp (int_unnop [i].op_name, name)) {
 285                         g_assert (int_unnop [i].op_table [type_index]);
 286
 287                         MONO_INST_NEW (cfg, ins, int_unnop [i].op_table [type_index]);
 288                         ins->dreg = alloc_dreg (cfg, stack_type);
 289                         ins->sreg1 = args [0]->dreg;
 290                         ins->type = stack_type;
 291                         MONO_ADD_INS (cfg->cbb, ins);
 292                         return ins;
 293                 }
 294         }
 295
 296         for (i = 0; i < sizeof (int_cmpop) / sizeof  (IntIntrisic); ++i) {
 297                 if (!strcmp (int_cmpop [i].op_name, name)) {
 298                         short op_cmp = int_cmpop [i].op_table [type_index];
 299
 300                         g_assert (op_cmp);
 301
 302                         if (info->compare_op) {
 303                                 MONO_INST_NEW (cfg, ins, info->compare_op);
 304                         ins->dreg = -1;
 305                                 ins->sreg1 = args [0]->dreg;
 306                         ins->sreg2 = args [1]->dreg;
 307                                 MONO_ADD_INS (cfg->cbb, ins);
 308
 309                                 MONO_INST_NEW (cfg, ins, op_cmp);
 310                         ins->dreg = alloc_preg (cfg);
 311                                 ins->type = STACK_I4;
 312                                 MONO_ADD_INS (cfg->cbb, ins);
 313                         } else {
 314                                 MONO_INST_NEW (cfg, ins, op_cmp);
 315                                 guint32 fcmp_dreg = ins->dreg = alloc_ireg (cfg);
 316                                 ins->sreg1 = args [0]->dreg;
 317                         ins->sreg2 = args [1]->dreg;
 318                                 MONO_ADD_INS (cfg->cbb, ins);
 319                                 if (op_cmp == OP_FCLT_UN || op_cmp == OP_FCGT_UN || op_cmp == OP_RCLT_UN || op_cmp == OP_RCGT_UN) {
 320                                         /* we have to negate the result of this comparison:
 321                                          *  - op_GreaterThanOrEqual maps to NOT x OP_FCLT_UN / OP_RCLT_UN
 322                                          *  - op_LessThanOrEqual    maps to NOT x OP_FCGT_UN / OP_RCGT_UN
 323                                          *
 324                                          *  this matches generated bytecode by C# when doing the
 325                                          *  same operations on float/double. the `_UN` suffix says
 326                                          *  that if an operand is NaN, the result is true. If
 327                                          *  OP_FCGE/OP_FCLE is used, it is mapped to instructions
 328                                          *  on some architectures that don't detect NaN. For
 329                                          *  example, on arm64 the condition `eq` doesn't respect
 330                                          *  NaN results of a `fcmp` instruction.
 331                                          */
 332                                         MONO_INST_NEW (cfg, ins, OP_ICOMPARE_IMM);
 333                                         ins->dreg = -1;
 334                                         ins->sreg1 = fcmp_dreg;
 335                                         ins->inst_imm = 0;
 336                                         MONO_ADD_INS (cfg->cbb, ins);
 337
 338                                         MONO_INST_NEW (cfg, ins, OP_CEQ);
 339                                         ins->dreg = alloc_preg (cfg);
 340                                         ins->type = STACK_I4;
 341                                         MONO_ADD_INS (cfg->cbb, ins);
 342                                 }
 343                         }
 344
 345                         return ins;
 346                 }
 347         }
 348
 349         return NULL;
 350 }
 351
 352
 353 MonoInst*
 354 mono_emit_native_types_intrinsics (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
 355 {
 356         if (mono_class_is_magic_int (cmethod->klass)) {
 357                 const char *class_name = m_class_get_name (cmethod->klass);
 358                 if (!strcmp ("nint", class_name))
 359                         return emit_intrinsics (cfg, cmethod, fsig, args, &type_info [0]);
 360                 else
 361                         return emit_intrinsics (cfg, cmethod, fsig, args, &type_info [1]);
 362         } else if (mono_class_is_magic_float (cmethod->klass))
 363                 return emit_intrinsics (cfg, cmethod, fsig, args, &type_info [2]);
 364
 365         return NULL;
 366 }
 367
 368 #endif /* !DISABLE_JIT */
 369
 370 static gboolean
 371 mono_class_is_magic_assembly (MonoClass *klass)
 372 {
 373         const char *aname = m_class_get_image (klass)->assembly_name;
 374         if (!aname)
 375                 return FALSE;
 376         if (!strcmp ("Xamarin.iOS", aname))
 377                 return TRUE;
 378         if (!strcmp ("Xamarin.Mac", aname))
 379                 return TRUE;
 380         if (!strcmp ("Xamarin.WatchOS", aname))
 381                 return TRUE;
 382         /* regression test suite */
 383         if (!strcmp ("builtin-types", aname))
 384                 return TRUE;
 385         if (!strcmp ("mini_tests", aname))
 386                 return TRUE;
 387         return FALSE;
 388 }
 389
 390 gboolean
 391 mono_class_is_magic_int (MonoClass *klass)
 392 {
 393         static MonoClass *magic_nint_class;
 394         static MonoClass *magic_nuint_class;
 395
 396         if (klass == magic_nint_class)
 397                 return TRUE;
 398
 399         if (klass == magic_nuint_class)
 400                 return TRUE;
 401
 402         if (magic_nint_class && magic_nuint_class)
 403                 return FALSE;
 404
 405         if (!mono_class_is_magic_assembly (klass))
 406                 return FALSE;
 407
 408         if (strcmp ("System", m_class_get_name_space (klass)) != 0)
 409                 return FALSE;
 410
 411         if (strcmp ("nint", m_class_get_name (klass)) == 0) {
 412                 magic_nint_class = klass;
 413                 return TRUE;
 414         }
 415
 416         if (strcmp ("nuint", m_class_get_name (klass)) == 0){
 417                 magic_nuint_class = klass;
 418                 return TRUE;
 419         }
 420         return FALSE;
 421 }
 422
 423 gboolean
 424 mono_class_is_magic_float (MonoClass *klass)
 425 {
 426         static MonoClass *magic_nfloat_class;
 427
 428         if (klass == magic_nfloat_class)
 429                 return TRUE;
 430
 431         if (magic_nfloat_class)
 432                 return FALSE;
 433
 434         if (!mono_class_is_magic_assembly (klass))
 435                 return FALSE;
 436
 437         if (strcmp ("System", m_class_get_name_space (klass)) != 0)
 438                 return FALSE;
 439
 440         if (strcmp ("nfloat", m_class_get_name (klass)) == 0) {
 441                 magic_nfloat_class = klass;
 442
 443                 /* Assert that we are using the matching assembly */
 444                 MonoClassField *value_field = mono_class_get_field_from_name_full (klass, "v", NULL);
 445                 g_assert (value_field);
 446                 MonoType *t = mono_field_get_type_internal (value_field);
 447                 MonoType *native = mini_native_type_replace_type (m_class_get_byval_arg (klass));
 448                 if (t->type != native->type)
 449                         g_error ("Assembly used for native types '%s' doesn't match this runtime, %s is mapped to %s, expecting %s.\n", m_class_get_image (klass)->name, m_class_get_name (klass), mono_type_full_name (t), mono_type_full_name (native));
 450                 return TRUE;
 451         }
 452         return FALSE;
 453 }
 454
 455 gboolean
 456 mini_magic_is_int_type (MonoType *t)
 457 {
 458         if (t->type != MONO_TYPE_I && t->type != MONO_TYPE_I4 && t->type != MONO_TYPE_I8 && t->type != MONO_TYPE_U4 && t->type != MONO_TYPE_U8 && !mono_class_is_magic_int (mono_class_from_mono_type_internal (t)))
 459                 return FALSE;
 460         return TRUE;
 461 }
 462
 463 gboolean
 464 mini_magic_is_float_type (MonoType *t)
 465 {
 466         if (t->type != MONO_TYPE_R4 && t->type != MONO_TYPE_R8 && !mono_class_is_magic_float (mono_class_from_mono_type_internal (t)))
 467                 return FALSE;
 468         return TRUE;
 469 }
 470
 471 MonoType*
 472 mini_native_type_replace_type (MonoType *type)
 473 {
 474         MonoClass *klass;
 475
 476         if (type->type != MONO_TYPE_VALUETYPE)
 477                 return type;
 478         klass = type->data.klass;
 479
 480         if (mono_class_is_magic_int (klass))
 481                 return type->byref ? m_class_get_this_arg (mono_defaults.int_class) : mono_get_int_type ();
 482         if (mono_class_is_magic_float (klass))
 483 #if TARGET_SIZEOF_VOID_P == 8
 484                 return type->byref ? m_class_get_this_arg (mono_defaults.double_class) : m_class_get_byval_arg (mono_defaults.double_class);
 485 #else
 486                 return type->byref ? m_class_get_this_arg (mono_defaults.single_class) : m_class_get_byval_arg (mono_defaults.single_class);
 487 #endif
 488         return type;
 489 }