js/src/wasm/WasmOpIter.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  *
   4  * Copyright 2015 Mozilla Foundation
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 #include "wasm/WasmOpIter.h"
  20
  21 #include "jit/AtomicOp.h"
  22
  23 using namespace js;
  24 using namespace js::jit;
  25 using namespace js::wasm;
  26
  27 #ifdef ENABLE_WASM_GC
  28 #  ifndef ENABLE_WASM_GC
  29 #    error "GC types require the function-references feature"
  30 #  endif
  31 #endif
  32
  33 #ifdef DEBUG
  34
  35 #  ifdef ENABLE_WASM_GC
  36 #    define WASM_FUNCTION_REFERENCES_OP(code) return code
  37 #  else
  38 #    define WASM_FUNCTION_REFERENCES_OP(code) break
  39 #  endif
  40 #  ifdef ENABLE_WASM_GC
  41 #    define WASM_GC_OP(code) return code
  42 #  else
  43 #    define WASM_GC_OP(code) break
  44 #  endif
  45 #  ifdef ENABLE_WASM_SIMD
  46 #    define WASM_SIMD_OP(code) return code
  47 #  else
  48 #    define WASM_SIMD_OP(code) break
  49 #  endif
  50
  51 OpKind wasm::Classify(OpBytes op) {
  52   switch (Op(op.b0)) {
  53     case Op::Block:
  54       return OpKind::Block;
  55     case Op::Loop:
  56       return OpKind::Loop;
  57     case Op::Unreachable:
  58       return OpKind::Unreachable;
  59     case Op::Drop:
  60       return OpKind::Drop;
  61     case Op::I32Const:
  62       return OpKind::I32;
  63     case Op::I64Const:
  64       return OpKind::I64;
  65     case Op::F32Const:
  66       return OpKind::F32;
  67     case Op::F64Const:
  68       return OpKind::F64;
  69     case Op::Br:
  70       return OpKind::Br;
  71     case Op::BrIf:
  72       return OpKind::BrIf;
  73     case Op::BrTable:
  74       return OpKind::BrTable;
  75     case Op::Nop:
  76       return OpKind::Nop;
  77     case Op::I32Clz:
  78     case Op::I32Ctz:
  79     case Op::I32Popcnt:
  80     case Op::I64Clz:
  81     case Op::I64Ctz:
  82     case Op::I64Popcnt:
  83     case Op::F32Abs:
  84     case Op::F32Neg:
  85     case Op::F32Ceil:
  86     case Op::F32Floor:
  87     case Op::F32Trunc:
  88     case Op::F32Nearest:
  89     case Op::F32Sqrt:
  90     case Op::F64Abs:
  91     case Op::F64Neg:
  92     case Op::F64Ceil:
  93     case Op::F64Floor:
  94     case Op::F64Trunc:
  95     case Op::F64Nearest:
  96     case Op::F64Sqrt:
  97       return OpKind::Unary;
  98     case Op::I32Add:
  99     case Op::I32Sub:
 100     case Op::I32Mul:
 101     case Op::I32DivS:
 102     case Op::I32DivU:
 103     case Op::I32RemS:
 104     case Op::I32RemU:
 105     case Op::I32And:
 106     case Op::I32Or:
 107     case Op::I32Xor:
 108     case Op::I32Shl:
 109     case Op::I32ShrS:
 110     case Op::I32ShrU:
 111     case Op::I32Rotl:
 112     case Op::I32Rotr:
 113     case Op::I64Add:
 114     case Op::I64Sub:
 115     case Op::I64Mul:
 116     case Op::I64DivS:
 117     case Op::I64DivU:
 118     case Op::I64RemS:
 119     case Op::I64RemU:
 120     case Op::I64And:
 121     case Op::I64Or:
 122     case Op::I64Xor:
 123     case Op::I64Shl:
 124     case Op::I64ShrS:
 125     case Op::I64ShrU:
 126     case Op::I64Rotl:
 127     case Op::I64Rotr:
 128     case Op::F32Add:
 129     case Op::F32Sub:
 130     case Op::F32Mul:
 131     case Op::F32Div:
 132     case Op::F32Min:
 133     case Op::F32Max:
 134     case Op::F32CopySign:
 135     case Op::F64Add:
 136     case Op::F64Sub:
 137     case Op::F64Mul:
 138     case Op::F64Div:
 139     case Op::F64Min:
 140     case Op::F64Max:
 141     case Op::F64CopySign:
 142       return OpKind::Binary;
 143     case Op::I32Eq:
 144     case Op::I32Ne:
 145     case Op::I32LtS:
 146     case Op::I32LtU:
 147     case Op::I32LeS:
 148     case Op::I32LeU:
 149     case Op::I32GtS:
 150     case Op::I32GtU:
 151     case Op::I32GeS:
 152     case Op::I32GeU:
 153     case Op::I64Eq:
 154     case Op::I64Ne:
 155     case Op::I64LtS:
 156     case Op::I64LtU:
 157     case Op::I64LeS:
 158     case Op::I64LeU:
 159     case Op::I64GtS:
 160     case Op::I64GtU:
 161     case Op::I64GeS:
 162     case Op::I64GeU:
 163     case Op::F32Eq:
 164     case Op::F32Ne:
 165     case Op::F32Lt:
 166     case Op::F32Le:
 167     case Op::F32Gt:
 168     case Op::F32Ge:
 169     case Op::F64Eq:
 170     case Op::F64Ne:
 171     case Op::F64Lt:
 172     case Op::F64Le:
 173     case Op::F64Gt:
 174     case Op::F64Ge:
 175       return OpKind::Comparison;
 176     case Op::I32Eqz:
 177     case Op::I32WrapI64:
 178     case Op::I32TruncF32S:
 179     case Op::I32TruncF32U:
 180     case Op::I32ReinterpretF32:
 181     case Op::I32TruncF64S:
 182     case Op::I32TruncF64U:
 183     case Op::I64ExtendI32S:
 184     case Op::I64ExtendI32U:
 185     case Op::I64TruncF32S:
 186     case Op::I64TruncF32U:
 187     case Op::I64TruncF64S:
 188     case Op::I64TruncF64U:
 189     case Op::I64ReinterpretF64:
 190     case Op::I64Eqz:
 191     case Op::F32ConvertI32S:
 192     case Op::F32ConvertI32U:
 193     case Op::F32ReinterpretI32:
 194     case Op::F32ConvertI64S:
 195     case Op::F32ConvertI64U:
 196     case Op::F32DemoteF64:
 197     case Op::F64ConvertI32S:
 198     case Op::F64ConvertI32U:
 199     case Op::F64ConvertI64S:
 200     case Op::F64ConvertI64U:
 201     case Op::F64ReinterpretI64:
 202     case Op::F64PromoteF32:
 203     case Op::I32Extend8S:
 204     case Op::I32Extend16S:
 205     case Op::I64Extend8S:
 206     case Op::I64Extend16S:
 207     case Op::I64Extend32S:
 208       return OpKind::Conversion;
 209     case Op::I32Load8S:
 210     case Op::I32Load8U:
 211     case Op::I32Load16S:
 212     case Op::I32Load16U:
 213     case Op::I64Load8S:
 214     case Op::I64Load8U:
 215     case Op::I64Load16S:
 216     case Op::I64Load16U:
 217     case Op::I64Load32S:
 218     case Op::I64Load32U:
 219     case Op::I32Load:
 220     case Op::I64Load:
 221     case Op::F32Load:
 222     case Op::F64Load:
 223       return OpKind::Load;
 224     case Op::I32Store8:
 225     case Op::I32Store16:
 226     case Op::I64Store8:
 227     case Op::I64Store16:
 228     case Op::I64Store32:
 229     case Op::I32Store:
 230     case Op::I64Store:
 231     case Op::F32Store:
 232     case Op::F64Store:
 233       return OpKind::Store;
 234     case Op::SelectNumeric:
 235     case Op::SelectTyped:
 236       return OpKind::Select;
 237     case Op::LocalGet:
 238       return OpKind::GetLocal;
 239     case Op::LocalSet:
 240       return OpKind::SetLocal;
 241     case Op::LocalTee:
 242       return OpKind::TeeLocal;
 243     case Op::GlobalGet:
 244       return OpKind::GetGlobal;
 245     case Op::GlobalSet:
 246       return OpKind::SetGlobal;
 247     case Op::TableGet:
 248       return OpKind::TableGet;
 249     case Op::TableSet:
 250       return OpKind::TableSet;
 251     case Op::Call:
 252       return OpKind::Call;
 253     case Op::ReturnCall:
 254       return OpKind::ReturnCall;
 255     case Op::CallIndirect:
 256       return OpKind::CallIndirect;
 257     case Op::ReturnCallIndirect:
 258       return OpKind::ReturnCallIndirect;
 259     case Op::CallRef:
 260       WASM_FUNCTION_REFERENCES_OP(OpKind::CallRef);
 261     case Op::ReturnCallRef:
 262       WASM_FUNCTION_REFERENCES_OP(OpKind::ReturnCallRef);
 263     case Op::Return:
 264     case Op::Limit:
 265       // Accept Limit, for use in decoding the end of a function after the body.
 266       return OpKind::Return;
 267     case Op::If:
 268       return OpKind::If;
 269     case Op::Else:
 270       return OpKind::Else;
 271     case Op::End:
 272       return OpKind::End;
 273     case Op::Catch:
 274       return OpKind::Catch;
 275     case Op::CatchAll:
 276       return OpKind::CatchAll;
 277     case Op::Delegate:
 278       return OpKind::Delegate;
 279     case Op::Throw:
 280       return OpKind::Throw;
 281     case Op::Rethrow:
 282       return OpKind::Rethrow;
 283     case Op::Try:
 284       return OpKind::Try;
 285     case Op::ThrowRef:
 286       return OpKind::ThrowRef;
 287     case Op::TryTable:
 288       return OpKind::TryTable;
 289     case Op::MemorySize:
 290       return OpKind::MemorySize;
 291     case Op::MemoryGrow:
 292       return OpKind::MemoryGrow;
 293     case Op::RefNull:
 294       return OpKind::RefNull;
 295     case Op::RefIsNull:
 296       return OpKind::Conversion;
 297     case Op::RefFunc:
 298       return OpKind::RefFunc;
 299     case Op::RefAsNonNull:
 300       WASM_FUNCTION_REFERENCES_OP(OpKind::RefAsNonNull);
 301     case Op::BrOnNull:
 302       WASM_FUNCTION_REFERENCES_OP(OpKind::BrOnNull);
 303     case Op::BrOnNonNull:
 304       WASM_FUNCTION_REFERENCES_OP(OpKind::BrOnNonNull);
 305     case Op::RefEq:
 306       WASM_GC_OP(OpKind::Comparison);
 307     case Op::GcPrefix: {
 308       switch (GcOp(op.b1)) {
 309         case GcOp::Limit:
 310           // Reject Limit for GcPrefix encoding
 311           break;
 312         case GcOp::StructNew:
 313           WASM_GC_OP(OpKind::StructNew);
 314         case GcOp::StructNewDefault:
 315           WASM_GC_OP(OpKind::StructNewDefault);
 316         case GcOp::StructGet:
 317         case GcOp::StructGetS:
 318         case GcOp::StructGetU:
 319           WASM_GC_OP(OpKind::StructGet);
 320         case GcOp::StructSet:
 321           WASM_GC_OP(OpKind::StructSet);
 322         case GcOp::ArrayNew:
 323           WASM_GC_OP(OpKind::ArrayNew);
 324         case GcOp::ArrayNewFixed:
 325           WASM_GC_OP(OpKind::ArrayNewFixed);
 326         case GcOp::ArrayNewDefault:
 327           WASM_GC_OP(OpKind::ArrayNewDefault);
 328         case GcOp::ArrayNewData:
 329           WASM_GC_OP(OpKind::ArrayNewData);
 330         case GcOp::ArrayNewElem:
 331           WASM_GC_OP(OpKind::ArrayNewElem);
 332         case GcOp::ArrayInitData:
 333           WASM_GC_OP(OpKind::ArrayInitData);
 334         case GcOp::ArrayInitElem:
 335           WASM_GC_OP(OpKind::ArrayInitElem);
 336         case GcOp::ArrayGet:
 337         case GcOp::ArrayGetS:
 338         case GcOp::ArrayGetU:
 339           WASM_GC_OP(OpKind::ArrayGet);
 340         case GcOp::ArraySet:
 341           WASM_GC_OP(OpKind::ArraySet);
 342         case GcOp::ArrayLen:
 343           WASM_GC_OP(OpKind::ArrayLen);
 344         case GcOp::ArrayCopy:
 345           WASM_GC_OP(OpKind::ArrayCopy);
 346         case GcOp::ArrayFill:
 347           WASM_GC_OP(OpKind::ArrayFill);
 348         case GcOp::RefI31:
 349         case GcOp::I31GetS:
 350         case GcOp::I31GetU:
 351           WASM_GC_OP(OpKind::Conversion);
 352         case GcOp::RefTest:
 353         case GcOp::RefTestNull:
 354           WASM_GC_OP(OpKind::RefTest);
 355         case GcOp::RefCast:
 356         case GcOp::RefCastNull:
 357           WASM_GC_OP(OpKind::RefCast);
 358         case GcOp::BrOnCast:
 359         case GcOp::BrOnCastFail:
 360           WASM_GC_OP(OpKind::BrOnCast);
 361         case GcOp::AnyConvertExtern:
 362           WASM_GC_OP(OpKind::RefConversion);
 363         case GcOp::ExternConvertAny:
 364           WASM_GC_OP(OpKind::RefConversion);
 365       }
 366       break;
 367     }
 368     case Op::SimdPrefix: {
 369       switch (SimdOp(op.b1)) {
 370         case SimdOp::MozPMADDUBSW:
 371         case SimdOp::Limit:
 372           // Reject Limit and reserved codes for SimdPrefix encoding
 373           break;
 374         case SimdOp::I8x16ExtractLaneS:
 375         case SimdOp::I8x16ExtractLaneU:
 376         case SimdOp::I16x8ExtractLaneS:
 377         case SimdOp::I16x8ExtractLaneU:
 378         case SimdOp::I32x4ExtractLane:
 379         case SimdOp::I64x2ExtractLane:
 380         case SimdOp::F32x4ExtractLane:
 381         case SimdOp::F64x2ExtractLane:
 382           WASM_SIMD_OP(OpKind::ExtractLane);
 383         case SimdOp::I8x16Splat:
 384         case SimdOp::I16x8Splat:
 385         case SimdOp::I32x4Splat:
 386         case SimdOp::I64x2Splat:
 387         case SimdOp::F32x4Splat:
 388         case SimdOp::F64x2Splat:
 389         case SimdOp::V128AnyTrue:
 390         case SimdOp::I8x16AllTrue:
 391         case SimdOp::I16x8AllTrue:
 392         case SimdOp::I32x4AllTrue:
 393         case SimdOp::I64x2AllTrue:
 394         case SimdOp::I8x16Bitmask:
 395         case SimdOp::I16x8Bitmask:
 396         case SimdOp::I32x4Bitmask:
 397         case SimdOp::I64x2Bitmask:
 398           WASM_SIMD_OP(OpKind::Conversion);
 399         case SimdOp::I8x16ReplaceLane:
 400         case SimdOp::I16x8ReplaceLane:
 401         case SimdOp::I32x4ReplaceLane:
 402         case SimdOp::I64x2ReplaceLane:
 403         case SimdOp::F32x4ReplaceLane:
 404         case SimdOp::F64x2ReplaceLane:
 405           WASM_SIMD_OP(OpKind::ReplaceLane);
 406         case SimdOp::I8x16Eq:
 407         case SimdOp::I8x16Ne:
 408         case SimdOp::I8x16LtS:
 409         case SimdOp::I8x16LtU:
 410         case SimdOp::I8x16GtS:
 411         case SimdOp::I8x16GtU:
 412         case SimdOp::I8x16LeS:
 413         case SimdOp::I8x16LeU:
 414         case SimdOp::I8x16GeS:
 415         case SimdOp::I8x16GeU:
 416         case SimdOp::I16x8Eq:
 417         case SimdOp::I16x8Ne:
 418         case SimdOp::I16x8LtS:
 419         case SimdOp::I16x8LtU:
 420         case SimdOp::I16x8GtS:
 421         case SimdOp::I16x8GtU:
 422         case SimdOp::I16x8LeS:
 423         case SimdOp::I16x8LeU:
 424         case SimdOp::I16x8GeS:
 425         case SimdOp::I16x8GeU:
 426         case SimdOp::I32x4Eq:
 427         case SimdOp::I32x4Ne:
 428         case SimdOp::I32x4LtS:
 429         case SimdOp::I32x4LtU:
 430         case SimdOp::I32x4GtS:
 431         case SimdOp::I32x4GtU:
 432         case SimdOp::I32x4LeS:
 433         case SimdOp::I32x4LeU:
 434         case SimdOp::I32x4GeS:
 435         case SimdOp::I32x4GeU:
 436         case SimdOp::I64x2Eq:
 437         case SimdOp::I64x2Ne:
 438         case SimdOp::I64x2LtS:
 439         case SimdOp::I64x2GtS:
 440         case SimdOp::I64x2LeS:
 441         case SimdOp::I64x2GeS:
 442         case SimdOp::F32x4Eq:
 443         case SimdOp::F32x4Ne:
 444         case SimdOp::F32x4Lt:
 445         case SimdOp::F32x4Gt:
 446         case SimdOp::F32x4Le:
 447         case SimdOp::F32x4Ge:
 448         case SimdOp::F64x2Eq:
 449         case SimdOp::F64x2Ne:
 450         case SimdOp::F64x2Lt:
 451         case SimdOp::F64x2Gt:
 452         case SimdOp::F64x2Le:
 453         case SimdOp::F64x2Ge:
 454         case SimdOp::V128And:
 455         case SimdOp::V128Or:
 456         case SimdOp::V128Xor:
 457         case SimdOp::V128AndNot:
 458         case SimdOp::I8x16AvgrU:
 459         case SimdOp::I16x8AvgrU:
 460         case SimdOp::I8x16Add:
 461         case SimdOp::I8x16AddSatS:
 462         case SimdOp::I8x16AddSatU:
 463         case SimdOp::I8x16Sub:
 464         case SimdOp::I8x16SubSatS:
 465         case SimdOp::I8x16SubSatU:
 466         case SimdOp::I8x16MinS:
 467         case SimdOp::I8x16MaxS:
 468         case SimdOp::I8x16MinU:
 469         case SimdOp::I8x16MaxU:
 470         case SimdOp::I16x8Add:
 471         case SimdOp::I16x8AddSatS:
 472         case SimdOp::I16x8AddSatU:
 473         case SimdOp::I16x8Sub:
 474         case SimdOp::I16x8SubSatS:
 475         case SimdOp::I16x8SubSatU:
 476         case SimdOp::I16x8Mul:
 477         case SimdOp::I16x8MinS:
 478         case SimdOp::I16x8MaxS:
 479         case SimdOp::I16x8MinU:
 480         case SimdOp::I16x8MaxU:
 481         case SimdOp::I32x4Add:
 482         case SimdOp::I32x4Sub:
 483         case SimdOp::I32x4Mul:
 484         case SimdOp::I32x4MinS:
 485         case SimdOp::I32x4MaxS:
 486         case SimdOp::I32x4MinU:
 487         case SimdOp::I32x4MaxU:
 488         case SimdOp::I64x2Add:
 489         case SimdOp::I64x2Sub:
 490         case SimdOp::I64x2Mul:
 491         case SimdOp::F32x4Add:
 492         case SimdOp::F32x4Sub:
 493         case SimdOp::F32x4Mul:
 494         case SimdOp::F32x4Div:
 495         case SimdOp::F32x4Min:
 496         case SimdOp::F32x4Max:
 497         case SimdOp::F64x2Add:
 498         case SimdOp::F64x2Sub:
 499         case SimdOp::F64x2Mul:
 500         case SimdOp::F64x2Div:
 501         case SimdOp::F64x2Min:
 502         case SimdOp::F64x2Max:
 503         case SimdOp::I8x16NarrowI16x8S:
 504         case SimdOp::I8x16NarrowI16x8U:
 505         case SimdOp::I16x8NarrowI32x4S:
 506         case SimdOp::I16x8NarrowI32x4U:
 507         case SimdOp::I8x16Swizzle:
 508         case SimdOp::F32x4PMin:
 509         case SimdOp::F32x4PMax:
 510         case SimdOp::F64x2PMin:
 511         case SimdOp::F64x2PMax:
 512         case SimdOp::I32x4DotI16x8S:
 513         case SimdOp::I16x8ExtmulLowI8x16S:
 514         case SimdOp::I16x8ExtmulHighI8x16S:
 515         case SimdOp::I16x8ExtmulLowI8x16U:
 516         case SimdOp::I16x8ExtmulHighI8x16U:
 517         case SimdOp::I32x4ExtmulLowI16x8S:
 518         case SimdOp::I32x4ExtmulHighI16x8S:
 519         case SimdOp::I32x4ExtmulLowI16x8U:
 520         case SimdOp::I32x4ExtmulHighI16x8U:
 521         case SimdOp::I64x2ExtmulLowI32x4S:
 522         case SimdOp::I64x2ExtmulHighI32x4S:
 523         case SimdOp::I64x2ExtmulLowI32x4U:
 524         case SimdOp::I64x2ExtmulHighI32x4U:
 525         case SimdOp::I16x8Q15MulrSatS:
 526         case SimdOp::F32x4RelaxedMin:
 527         case SimdOp::F32x4RelaxedMax:
 528         case SimdOp::F64x2RelaxedMin:
 529         case SimdOp::F64x2RelaxedMax:
 530         case SimdOp::I8x16RelaxedSwizzle:
 531         case SimdOp::I16x8RelaxedQ15MulrS:
 532         case SimdOp::I16x8DotI8x16I7x16S:
 533           WASM_SIMD_OP(OpKind::Binary);
 534         case SimdOp::I8x16Neg:
 535         case SimdOp::I16x8Neg:
 536         case SimdOp::I16x8ExtendLowI8x16S:
 537         case SimdOp::I16x8ExtendHighI8x16S:
 538         case SimdOp::I16x8ExtendLowI8x16U:
 539         case SimdOp::I16x8ExtendHighI8x16U:
 540         case SimdOp::I32x4Neg:
 541         case SimdOp::I32x4ExtendLowI16x8S:
 542         case SimdOp::I32x4ExtendHighI16x8S:
 543         case SimdOp::I32x4ExtendLowI16x8U:
 544         case SimdOp::I32x4ExtendHighI16x8U:
 545         case SimdOp::I32x4TruncSatF32x4S:
 546         case SimdOp::I32x4TruncSatF32x4U:
 547         case SimdOp::I64x2Neg:
 548         case SimdOp::I64x2ExtendLowI32x4S:
 549         case SimdOp::I64x2ExtendHighI32x4S:
 550         case SimdOp::I64x2ExtendLowI32x4U:
 551         case SimdOp::I64x2ExtendHighI32x4U:
 552         case SimdOp::F32x4Abs:
 553         case SimdOp::F32x4Neg:
 554         case SimdOp::F32x4Sqrt:
 555         case SimdOp::F32x4ConvertI32x4S:
 556         case SimdOp::F32x4ConvertI32x4U:
 557         case SimdOp::F64x2Abs:
 558         case SimdOp::F64x2Neg:
 559         case SimdOp::F64x2Sqrt:
 560         case SimdOp::V128Not:
 561         case SimdOp::I8x16Popcnt:
 562         case SimdOp::I8x16Abs:
 563         case SimdOp::I16x8Abs:
 564         case SimdOp::I32x4Abs:
 565         case SimdOp::I64x2Abs:
 566         case SimdOp::F32x4Ceil:
 567         case SimdOp::F32x4Floor:
 568         case SimdOp::F32x4Trunc:
 569         case SimdOp::F32x4Nearest:
 570         case SimdOp::F64x2Ceil:
 571         case SimdOp::F64x2Floor:
 572         case SimdOp::F64x2Trunc:
 573         case SimdOp::F64x2Nearest:
 574         case SimdOp::F32x4DemoteF64x2Zero:
 575         case SimdOp::F64x2PromoteLowF32x4:
 576         case SimdOp::F64x2ConvertLowI32x4S:
 577         case SimdOp::F64x2ConvertLowI32x4U:
 578         case SimdOp::I32x4TruncSatF64x2SZero:
 579         case SimdOp::I32x4TruncSatF64x2UZero:
 580         case SimdOp::I16x8ExtaddPairwiseI8x16S:
 581         case SimdOp::I16x8ExtaddPairwiseI8x16U:
 582         case SimdOp::I32x4ExtaddPairwiseI16x8S:
 583         case SimdOp::I32x4ExtaddPairwiseI16x8U:
 584         case SimdOp::I32x4RelaxedTruncF32x4S:
 585         case SimdOp::I32x4RelaxedTruncF32x4U:
 586         case SimdOp::I32x4RelaxedTruncF64x2SZero:
 587         case SimdOp::I32x4RelaxedTruncF64x2UZero:
 588           WASM_SIMD_OP(OpKind::Unary);
 589         case SimdOp::I8x16Shl:
 590         case SimdOp::I8x16ShrS:
 591         case SimdOp::I8x16ShrU:
 592         case SimdOp::I16x8Shl:
 593         case SimdOp::I16x8ShrS:
 594         case SimdOp::I16x8ShrU:
 595         case SimdOp::I32x4Shl:
 596         case SimdOp::I32x4ShrS:
 597         case SimdOp::I32x4ShrU:
 598         case SimdOp::I64x2Shl:
 599         case SimdOp::I64x2ShrS:
 600         case SimdOp::I64x2ShrU:
 601           WASM_SIMD_OP(OpKind::VectorShift);
 602         case SimdOp::V128Bitselect:
 603           WASM_SIMD_OP(OpKind::Ternary);
 604         case SimdOp::I8x16Shuffle:
 605           WASM_SIMD_OP(OpKind::VectorShuffle);
 606         case SimdOp::V128Const:
 607           WASM_SIMD_OP(OpKind::V128);
 608         case SimdOp::V128Load:
 609         case SimdOp::V128Load8Splat:
 610         case SimdOp::V128Load16Splat:
 611         case SimdOp::V128Load32Splat:
 612         case SimdOp::V128Load64Splat:
 613         case SimdOp::V128Load8x8S:
 614         case SimdOp::V128Load8x8U:
 615         case SimdOp::V128Load16x4S:
 616         case SimdOp::V128Load16x4U:
 617         case SimdOp::V128Load32x2S:
 618         case SimdOp::V128Load32x2U:
 619         case SimdOp::V128Load32Zero:
 620         case SimdOp::V128Load64Zero:
 621           WASM_SIMD_OP(OpKind::Load);
 622         case SimdOp::V128Store:
 623           WASM_SIMD_OP(OpKind::Store);
 624         case SimdOp::V128Load8Lane:
 625         case SimdOp::V128Load16Lane:
 626         case SimdOp::V128Load32Lane:
 627         case SimdOp::V128Load64Lane:
 628           WASM_SIMD_OP(OpKind::LoadLane);
 629         case SimdOp::V128Store8Lane:
 630         case SimdOp::V128Store16Lane:
 631         case SimdOp::V128Store32Lane:
 632         case SimdOp::V128Store64Lane:
 633           WASM_SIMD_OP(OpKind::StoreLane);
 634         case SimdOp::F32x4RelaxedMadd:
 635         case SimdOp::F32x4RelaxedNmadd:
 636         case SimdOp::F64x2RelaxedMadd:
 637         case SimdOp::F64x2RelaxedNmadd:
 638         case SimdOp::I8x16RelaxedLaneSelect:
 639         case SimdOp::I16x8RelaxedLaneSelect:
 640         case SimdOp::I32x4RelaxedLaneSelect:
 641         case SimdOp::I64x2RelaxedLaneSelect:
 642         case SimdOp::I32x4DotI8x16I7x16AddS:
 643           WASM_SIMD_OP(OpKind::Ternary);
 644       }
 645       break;
 646     }
 647     case Op::MiscPrefix: {
 648       switch (MiscOp(op.b1)) {
 649         case MiscOp::Limit:
 650           // Reject Limit for MiscPrefix encoding
 651           break;
 652         case MiscOp::I32TruncSatF32S:
 653         case MiscOp::I32TruncSatF32U:
 654         case MiscOp::I32TruncSatF64S:
 655         case MiscOp::I32TruncSatF64U:
 656         case MiscOp::I64TruncSatF32S:
 657         case MiscOp::I64TruncSatF32U:
 658         case MiscOp::I64TruncSatF64S:
 659         case MiscOp::I64TruncSatF64U:
 660           return OpKind::Conversion;
 661         case MiscOp::MemoryCopy:
 662         case MiscOp::TableCopy:
 663           return OpKind::MemOrTableCopy;
 664         case MiscOp::DataDrop:
 665         case MiscOp::ElemDrop:
 666           return OpKind::DataOrElemDrop;
 667         case MiscOp::MemoryFill:
 668           return OpKind::MemFill;
 669         case MiscOp::MemoryInit:
 670         case MiscOp::TableInit:
 671           return OpKind::MemOrTableInit;
 672         case MiscOp::TableFill:
 673           return OpKind::TableFill;
 674         case MiscOp::MemoryDiscard:
 675           return OpKind::MemDiscard;
 676         case MiscOp::TableGrow:
 677           return OpKind::TableGrow;
 678         case MiscOp::TableSize:
 679           return OpKind::TableSize;
 680       }
 681       break;
 682     }
 683     case Op::ThreadPrefix: {
 684       switch (ThreadOp(op.b1)) {
 685         case ThreadOp::Limit:
 686           // Reject Limit for ThreadPrefix encoding
 687           break;
 688         case ThreadOp::Wake:
 689           return OpKind::Wake;
 690         case ThreadOp::I32Wait:
 691         case ThreadOp::I64Wait:
 692           return OpKind::Wait;
 693         case ThreadOp::Fence:
 694           return OpKind::Fence;
 695         case ThreadOp::I32AtomicLoad:
 696         case ThreadOp::I64AtomicLoad:
 697         case ThreadOp::I32AtomicLoad8U:
 698         case ThreadOp::I32AtomicLoad16U:
 699         case ThreadOp::I64AtomicLoad8U:
 700         case ThreadOp::I64AtomicLoad16U:
 701         case ThreadOp::I64AtomicLoad32U:
 702           return OpKind::AtomicLoad;
 703         case ThreadOp::I32AtomicStore:
 704         case ThreadOp::I64AtomicStore:
 705         case ThreadOp::I32AtomicStore8U:
 706         case ThreadOp::I32AtomicStore16U:
 707         case ThreadOp::I64AtomicStore8U:
 708         case ThreadOp::I64AtomicStore16U:
 709         case ThreadOp::I64AtomicStore32U:
 710           return OpKind::AtomicStore;
 711         case ThreadOp::I32AtomicAdd:
 712         case ThreadOp::I64AtomicAdd:
 713         case ThreadOp::I32AtomicAdd8U:
 714         case ThreadOp::I32AtomicAdd16U:
 715         case ThreadOp::I64AtomicAdd8U:
 716         case ThreadOp::I64AtomicAdd16U:
 717         case ThreadOp::I64AtomicAdd32U:
 718         case ThreadOp::I32AtomicSub:
 719         case ThreadOp::I64AtomicSub:
 720         case ThreadOp::I32AtomicSub8U:
 721         case ThreadOp::I32AtomicSub16U:
 722         case ThreadOp::I64AtomicSub8U:
 723         case ThreadOp::I64AtomicSub16U:
 724         case ThreadOp::I64AtomicSub32U:
 725         case ThreadOp::I32AtomicAnd:
 726         case ThreadOp::I64AtomicAnd:
 727         case ThreadOp::I32AtomicAnd8U:
 728         case ThreadOp::I32AtomicAnd16U:
 729         case ThreadOp::I64AtomicAnd8U:
 730         case ThreadOp::I64AtomicAnd16U:
 731         case ThreadOp::I64AtomicAnd32U:
 732         case ThreadOp::I32AtomicOr:
 733         case ThreadOp::I64AtomicOr:
 734         case ThreadOp::I32AtomicOr8U:
 735         case ThreadOp::I32AtomicOr16U:
 736         case ThreadOp::I64AtomicOr8U:
 737         case ThreadOp::I64AtomicOr16U:
 738         case ThreadOp::I64AtomicOr32U:
 739         case ThreadOp::I32AtomicXor:
 740         case ThreadOp::I64AtomicXor:
 741         case ThreadOp::I32AtomicXor8U:
 742         case ThreadOp::I32AtomicXor16U:
 743         case ThreadOp::I64AtomicXor8U:
 744         case ThreadOp::I64AtomicXor16U:
 745         case ThreadOp::I64AtomicXor32U:
 746         case ThreadOp::I32AtomicXchg:
 747         case ThreadOp::I64AtomicXchg:
 748         case ThreadOp::I32AtomicXchg8U:
 749         case ThreadOp::I32AtomicXchg16U:
 750         case ThreadOp::I64AtomicXchg8U:
 751         case ThreadOp::I64AtomicXchg16U:
 752         case ThreadOp::I64AtomicXchg32U:
 753           return OpKind::AtomicBinOp;
 754         case ThreadOp::I32AtomicCmpXchg:
 755         case ThreadOp::I64AtomicCmpXchg:
 756         case ThreadOp::I32AtomicCmpXchg8U:
 757         case ThreadOp::I32AtomicCmpXchg16U:
 758         case ThreadOp::I64AtomicCmpXchg8U:
 759         case ThreadOp::I64AtomicCmpXchg16U:
 760         case ThreadOp::I64AtomicCmpXchg32U:
 761           return OpKind::AtomicCompareExchange;
 762         default:
 763           break;
 764       }
 765       break;
 766     }
 767     case Op::MozPrefix: {
 768       switch (MozOp(op.b1)) {
 769         case MozOp::Limit:
 770           // Reject Limit for the MozPrefix encoding
 771           break;
 772         case MozOp::TeeGlobal:
 773           return OpKind::TeeGlobal;
 774         case MozOp::I32BitNot:
 775         case MozOp::I32Abs:
 776         case MozOp::I32Neg:
 777           return OpKind::Unary;
 778         case MozOp::I32Min:
 779         case MozOp::I32Max:
 780         case MozOp::F64Mod:
 781         case MozOp::F64Pow:
 782         case MozOp::F64Atan2:
 783           return OpKind::Binary;
 784         case MozOp::F64SinNative:
 785         case MozOp::F64SinFdlibm:
 786         case MozOp::F64CosNative:
 787         case MozOp::F64CosFdlibm:
 788         case MozOp::F64TanNative:
 789         case MozOp::F64TanFdlibm:
 790         case MozOp::F64Asin:
 791         case MozOp::F64Acos:
 792         case MozOp::F64Atan:
 793         case MozOp::F64Exp:
 794         case MozOp::F64Log:
 795           return OpKind::Unary;
 796         case MozOp::I32TeeStore8:
 797         case MozOp::I32TeeStore16:
 798         case MozOp::I64TeeStore8:
 799         case MozOp::I64TeeStore16:
 800         case MozOp::I64TeeStore32:
 801         case MozOp::I32TeeStore:
 802         case MozOp::I64TeeStore:
 803         case MozOp::F32TeeStore:
 804         case MozOp::F64TeeStore:
 805         case MozOp::F32TeeStoreF64:
 806         case MozOp::F64TeeStoreF32:
 807           return OpKind::TeeStore;
 808         case MozOp::OldCallDirect:
 809           return OpKind::OldCallDirect;
 810         case MozOp::OldCallIndirect:
 811           return OpKind::OldCallIndirect;
 812         case MozOp::CallBuiltinModuleFunc:
 813           return OpKind::CallBuiltinModuleFunc;
 814       }
 815       break;
 816     }
 817     case Op::FirstPrefix:
 818       break;
 819   }
 820   MOZ_CRASH("unimplemented opcode");
 821 }
 822
 823 #  undef WASM_GC_OP
 824 #  undef WASM_REF_OP
 825
 826 #endif  // DEBUG
 827
 828 bool UnsetLocalsState::init(const ValTypeVector& locals, size_t numParams) {
 829   MOZ_ASSERT(setLocalsStack_.empty());
 830
 831   // Find the first and total count of non-defaultable locals.
 832   size_t firstNonDefaultable = UINT32_MAX;
 833   size_t countNonDefaultable = 0;
 834   for (size_t i = numParams; i < locals.length(); i++) {
 835     if (!locals[i].isDefaultable()) {
 836       firstNonDefaultable = std::min(i, firstNonDefaultable);
 837       countNonDefaultable++;
 838     }
 839   }
 840   firstNonDefaultLocal_ = firstNonDefaultable;
 841   if (countNonDefaultable == 0) {
 842     // No locals to track, saving CPU cycles.
 843     MOZ_ASSERT(firstNonDefaultable == UINT32_MAX);
 844     return true;
 845   }
 846
 847   // setLocalsStack_ cannot be deeper than amount of non-defaultable locals.
 848   if (!setLocalsStack_.reserve(countNonDefaultable)) {
 849     return false;
 850   }
 851
 852   // Allocate a bitmap for locals starting at the first non-defaultable local.
 853   size_t bitmapSize =
 854       ((locals.length() - firstNonDefaultable) + (WordBits - 1)) / WordBits;
 855   if (!unsetLocals_.resize(bitmapSize)) {
 856     return false;
 857   }
 858   memset(unsetLocals_.begin(), 0, bitmapSize * WordSize);
 859   for (size_t i = firstNonDefaultable; i < locals.length(); i++) {
 860     if (!locals[i].isDefaultable()) {
 861       size_t localUnsetIndex = i - firstNonDefaultable;
 862       unsetLocals_[localUnsetIndex / WordBits] |=
 863           1 << (localUnsetIndex % WordBits);
 864     }
 865   }
 866   return true;
 867 }