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