1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_WASM_OPCODES_H_ 6 #define V8_WASM_OPCODES_H_ 7 8 #include "src/machine-type.h" 9 #include "src/signature.h" 10 11 namespace v8 { 12 namespace internal { 13 namespace wasm { 14 15 // Binary encoding of local types. 16 enum LocalTypeCode { 17 kLocalVoid = 0, 18 kLocalI32 = 1, 19 kLocalI64 = 2, 20 kLocalF32 = 3, 21 kLocalF64 = 4 22 }; 23 24 // Binary encoding of memory types. 25 enum MemTypeCode { 26 kMemI8 = 0, 27 kMemU8 = 1, 28 kMemI16 = 2, 29 kMemU16 = 3, 30 kMemI32 = 4, 31 kMemU32 = 5, 32 kMemI64 = 6, 33 kMemU64 = 7, 34 kMemF32 = 8, 35 kMemF64 = 9 36 }; 37 38 // We reuse the internal machine type to represent WebAssembly AST types. 39 // A typedef improves readability without adding a whole new type system. 40 typedef MachineRepresentation LocalType; 41 const LocalType kAstStmt = MachineRepresentation::kNone; 42 const LocalType kAstI32 = MachineRepresentation::kWord32; 43 const LocalType kAstI64 = MachineRepresentation::kWord64; 44 const LocalType kAstF32 = MachineRepresentation::kFloat32; 45 const LocalType kAstF64 = MachineRepresentation::kFloat64; 46 // We use kTagged here because kNone is already used by kAstStmt. 47 const LocalType kAstEnd = MachineRepresentation::kTagged; 48 49 // Functionality related to encoding memory accesses. 50 struct MemoryAccess { 51 // Atomicity annotations for access to the memory and globals. 52 enum Atomicity { 53 kNone = 0, // non-atomic 54 kSequential = 1, // sequential consistency 55 kAcquire = 2, // acquire semantics 56 kRelease = 3 // release semantics 57 }; 58 59 // Alignment annotations for memory accesses. 60 enum Alignment { kAligned = 0, kUnaligned = 1 }; 61 62 // Bitfields for the various annotations for memory accesses. 63 typedef BitField<Alignment, 7, 1> AlignmentField; 64 typedef BitField<Atomicity, 5, 2> AtomicityField; 65 typedef BitField<bool, 4, 1> OffsetField; 66 }; 67 68 typedef Signature<LocalType> FunctionSig; 69 70 // Control expressions and blocks. 71 #define FOREACH_CONTROL_OPCODE(V) \ 72 V(Nop, 0x00, _) \ 73 V(Block, 0x01, _) \ 74 V(Loop, 0x02, _) \ 75 V(If, 0x03, _) \ 76 V(IfElse, 0x04, _) \ 77 V(Select, 0x05, _) \ 78 V(Br, 0x06, _) \ 79 V(BrIf, 0x07, _) \ 80 V(TableSwitch, 0x08, _) \ 81 V(Return, 0x14, _) \ 82 V(Unreachable, 0x15, _) 83 // TODO(titzer): numbering 84 85 // Constants, locals, globals, and calls. 86 #define FOREACH_MISC_OPCODE(V) \ 87 V(I8Const, 0x09, _) \ 88 V(I32Const, 0x0a, _) \ 89 V(I64Const, 0x0b, _) \ 90 V(F64Const, 0x0c, _) \ 91 V(F32Const, 0x0d, _) \ 92 V(GetLocal, 0x0e, _) \ 93 V(SetLocal, 0x0f, _) \ 94 V(LoadGlobal, 0x10, _) \ 95 V(StoreGlobal, 0x11, _) \ 96 V(CallFunction, 0x12, _) \ 97 V(CallIndirect, 0x13, _) 98 99 // Load memory expressions. 100 #define FOREACH_LOAD_MEM_OPCODE(V) \ 101 V(I32LoadMem8S, 0x20, i_i) \ 102 V(I32LoadMem8U, 0x21, i_i) \ 103 V(I32LoadMem16S, 0x22, i_i) \ 104 V(I32LoadMem16U, 0x23, i_i) \ 105 V(I64LoadMem8S, 0x24, l_i) \ 106 V(I64LoadMem8U, 0x25, l_i) \ 107 V(I64LoadMem16S, 0x26, l_i) \ 108 V(I64LoadMem16U, 0x27, l_i) \ 109 V(I64LoadMem32S, 0x28, l_i) \ 110 V(I64LoadMem32U, 0x29, l_i) \ 111 V(I32LoadMem, 0x2a, i_i) \ 112 V(I64LoadMem, 0x2b, l_i) \ 113 V(F32LoadMem, 0x2c, f_i) \ 114 V(F64LoadMem, 0x2d, d_i) 115 116 // Store memory expressions. 117 #define FOREACH_STORE_MEM_OPCODE(V) \ 118 V(I32StoreMem8, 0x2e, i_ii) \ 119 V(I32StoreMem16, 0x2f, i_ii) \ 120 V(I64StoreMem8, 0x30, l_il) \ 121 V(I64StoreMem16, 0x31, l_il) \ 122 V(I64StoreMem32, 0x32, l_il) \ 123 V(I32StoreMem, 0x33, i_ii) \ 124 V(I64StoreMem, 0x34, l_il) \ 125 V(F32StoreMem, 0x35, f_if) \ 126 V(F64StoreMem, 0x36, d_id) 127 128 // Load memory expressions. 129 #define FOREACH_MISC_MEM_OPCODE(V) \ 130 V(MemorySize, 0x3b, i_v) \ 131 V(GrowMemory, 0x39, i_i) 132 133 // Expressions with signatures. 134 #define FOREACH_SIMPLE_OPCODE(V) \ 135 V(I32Add, 0x40, i_ii) \ 136 V(I32Sub, 0x41, i_ii) \ 137 V(I32Mul, 0x42, i_ii) \ 138 V(I32DivS, 0x43, i_ii) \ 139 V(I32DivU, 0x44, i_ii) \ 140 V(I32RemS, 0x45, i_ii) \ 141 V(I32RemU, 0x46, i_ii) \ 142 V(I32And, 0x47, i_ii) \ 143 V(I32Ior, 0x48, i_ii) \ 144 V(I32Xor, 0x49, i_ii) \ 145 V(I32Shl, 0x4a, i_ii) \ 146 V(I32ShrU, 0x4b, i_ii) \ 147 V(I32ShrS, 0x4c, i_ii) \ 148 V(I32Eq, 0x4d, i_ii) \ 149 V(I32Ne, 0x4e, i_ii) \ 150 V(I32LtS, 0x4f, i_ii) \ 151 V(I32LeS, 0x50, i_ii) \ 152 V(I32LtU, 0x51, i_ii) \ 153 V(I32LeU, 0x52, i_ii) \ 154 V(I32GtS, 0x53, i_ii) \ 155 V(I32GeS, 0x54, i_ii) \ 156 V(I32GtU, 0x55, i_ii) \ 157 V(I32GeU, 0x56, i_ii) \ 158 V(I32Clz, 0x57, i_i) \ 159 V(I32Ctz, 0x58, i_i) \ 160 V(I32Popcnt, 0x59, i_i) \ 161 V(BoolNot, 0x5a, i_i) \ 162 V(I64Add, 0x5b, l_ll) \ 163 V(I64Sub, 0x5c, l_ll) \ 164 V(I64Mul, 0x5d, l_ll) \ 165 V(I64DivS, 0x5e, l_ll) \ 166 V(I64DivU, 0x5f, l_ll) \ 167 V(I64RemS, 0x60, l_ll) \ 168 V(I64RemU, 0x61, l_ll) \ 169 V(I64And, 0x62, l_ll) \ 170 V(I64Ior, 0x63, l_ll) \ 171 V(I64Xor, 0x64, l_ll) \ 172 V(I64Shl, 0x65, l_ll) \ 173 V(I64ShrU, 0x66, l_ll) \ 174 V(I64ShrS, 0x67, l_ll) \ 175 V(I64Eq, 0x68, i_ll) \ 176 V(I64Ne, 0x69, i_ll) \ 177 V(I64LtS, 0x6a, i_ll) \ 178 V(I64LeS, 0x6b, i_ll) \ 179 V(I64LtU, 0x6c, i_ll) \ 180 V(I64LeU, 0x6d, i_ll) \ 181 V(I64GtS, 0x6e, i_ll) \ 182 V(I64GeS, 0x6f, i_ll) \ 183 V(I64GtU, 0x70, i_ll) \ 184 V(I64GeU, 0x71, i_ll) \ 185 V(I64Clz, 0x72, l_l) \ 186 V(I64Ctz, 0x73, l_l) \ 187 V(I64Popcnt, 0x74, l_l) \ 188 V(F32Add, 0x75, f_ff) \ 189 V(F32Sub, 0x76, f_ff) \ 190 V(F32Mul, 0x77, f_ff) \ 191 V(F32Div, 0x78, f_ff) \ 192 V(F32Min, 0x79, f_ff) \ 193 V(F32Max, 0x7a, f_ff) \ 194 V(F32Abs, 0x7b, f_f) \ 195 V(F32Neg, 0x7c, f_f) \ 196 V(F32CopySign, 0x7d, f_ff) \ 197 V(F32Ceil, 0x7e, f_f) \ 198 V(F32Floor, 0x7f, f_f) \ 199 V(F32Trunc, 0x80, f_f) \ 200 V(F32NearestInt, 0x81, f_f) \ 201 V(F32Sqrt, 0x82, f_f) \ 202 V(F32Eq, 0x83, i_ff) \ 203 V(F32Ne, 0x84, i_ff) \ 204 V(F32Lt, 0x85, i_ff) \ 205 V(F32Le, 0x86, i_ff) \ 206 V(F32Gt, 0x87, i_ff) \ 207 V(F32Ge, 0x88, i_ff) \ 208 V(F64Add, 0x89, d_dd) \ 209 V(F64Sub, 0x8a, d_dd) \ 210 V(F64Mul, 0x8b, d_dd) \ 211 V(F64Div, 0x8c, d_dd) \ 212 V(F64Min, 0x8d, d_dd) \ 213 V(F64Max, 0x8e, d_dd) \ 214 V(F64Abs, 0x8f, d_d) \ 215 V(F64Neg, 0x90, d_d) \ 216 V(F64CopySign, 0x91, d_dd) \ 217 V(F64Ceil, 0x92, d_d) \ 218 V(F64Floor, 0x93, d_d) \ 219 V(F64Trunc, 0x94, d_d) \ 220 V(F64NearestInt, 0x95, d_d) \ 221 V(F64Sqrt, 0x96, d_d) \ 222 V(F64Eq, 0x97, i_dd) \ 223 V(F64Ne, 0x98, i_dd) \ 224 V(F64Lt, 0x99, i_dd) \ 225 V(F64Le, 0x9a, i_dd) \ 226 V(F64Gt, 0x9b, i_dd) \ 227 V(F64Ge, 0x9c, i_dd) \ 228 V(I32SConvertF32, 0x9d, i_f) \ 229 V(I32SConvertF64, 0x9e, i_d) \ 230 V(I32UConvertF32, 0x9f, i_f) \ 231 V(I32UConvertF64, 0xa0, i_d) \ 232 V(I32ConvertI64, 0xa1, i_l) \ 233 V(I64SConvertF32, 0xa2, l_f) \ 234 V(I64SConvertF64, 0xa3, l_d) \ 235 V(I64UConvertF32, 0xa4, l_f) \ 236 V(I64UConvertF64, 0xa5, l_d) \ 237 V(I64SConvertI32, 0xa6, l_i) \ 238 V(I64UConvertI32, 0xa7, l_i) \ 239 V(F32SConvertI32, 0xa8, f_i) \ 240 V(F32UConvertI32, 0xa9, f_i) \ 241 V(F32SConvertI64, 0xaa, f_l) \ 242 V(F32UConvertI64, 0xab, f_l) \ 243 V(F32ConvertF64, 0xac, f_d) \ 244 V(F32ReinterpretI32, 0xad, f_i) \ 245 V(F64SConvertI32, 0xae, d_i) \ 246 V(F64UConvertI32, 0xaf, d_i) \ 247 V(F64SConvertI64, 0xb0, d_l) \ 248 V(F64UConvertI64, 0xb1, d_l) \ 249 V(F64ConvertF32, 0xb2, d_f) \ 250 V(F64ReinterpretI64, 0xb3, d_l) \ 251 V(I32ReinterpretF32, 0xb4, i_f) \ 252 V(I64ReinterpretF64, 0xb5, l_d) 253 254 // All opcodes. 255 #define FOREACH_OPCODE(V) \ 256 FOREACH_CONTROL_OPCODE(V) \ 257 FOREACH_MISC_OPCODE(V) \ 258 FOREACH_SIMPLE_OPCODE(V) \ 259 FOREACH_STORE_MEM_OPCODE(V) \ 260 FOREACH_LOAD_MEM_OPCODE(V) \ 261 FOREACH_MISC_MEM_OPCODE(V) 262 263 // All signatures. 264 #define FOREACH_SIGNATURE(V) \ 265 V(i_ii, kAstI32, kAstI32, kAstI32) \ 266 V(i_i, kAstI32, kAstI32) \ 267 V(i_v, kAstI32) \ 268 V(i_ff, kAstI32, kAstF32, kAstF32) \ 269 V(i_f, kAstI32, kAstF32) \ 270 V(i_dd, kAstI32, kAstF64, kAstF64) \ 271 V(i_d, kAstI32, kAstF64) \ 272 V(i_l, kAstI32, kAstI64) \ 273 V(l_ll, kAstI64, kAstI64, kAstI64) \ 274 V(i_ll, kAstI32, kAstI64, kAstI64) \ 275 V(l_l, kAstI64, kAstI64) \ 276 V(l_i, kAstI64, kAstI32) \ 277 V(l_f, kAstI64, kAstF32) \ 278 V(l_d, kAstI64, kAstF64) \ 279 V(f_ff, kAstF32, kAstF32, kAstF32) \ 280 V(f_f, kAstF32, kAstF32) \ 281 V(f_d, kAstF32, kAstF64) \ 282 V(f_i, kAstF32, kAstI32) \ 283 V(f_l, kAstF32, kAstI64) \ 284 V(d_dd, kAstF64, kAstF64, kAstF64) \ 285 V(d_d, kAstF64, kAstF64) \ 286 V(d_f, kAstF64, kAstF32) \ 287 V(d_i, kAstF64, kAstI32) \ 288 V(d_l, kAstF64, kAstI64) \ 289 V(d_id, kAstF64, kAstI32, kAstF64) \ 290 V(f_if, kAstF32, kAstI32, kAstF32) \ 291 V(l_il, kAstI64, kAstI32, kAstI64) 292 293 enum WasmOpcode { 294 // Declare expression opcodes. 295 #define DECLARE_NAMED_ENUM(name, opcode, sig) kExpr##name = opcode, 296 FOREACH_OPCODE(DECLARE_NAMED_ENUM) 297 #undef DECLARE_NAMED_ENUM 298 }; 299 300 // A collection of opcode-related static methods. 301 class WasmOpcodes { 302 public: 303 static bool IsSupported(WasmOpcode opcode); 304 static const char* OpcodeName(WasmOpcode opcode); 305 static FunctionSig* Signature(WasmOpcode opcode); 306 307 static byte MemSize(MachineType type) { 308 return 1 << ElementSizeLog2Of(type.representation()); 309 } 310 311 static LocalTypeCode LocalTypeCodeFor(LocalType type) { 312 switch (type) { 313 case kAstI32: 314 return kLocalI32; 315 case kAstI64: 316 return kLocalI64; 317 case kAstF32: 318 return kLocalF32; 319 case kAstF64: 320 return kLocalF64; 321 case kAstStmt: 322 return kLocalVoid; 323 default: 324 UNREACHABLE(); 325 return kLocalVoid; 326 } 327 } 328 329 static MemTypeCode MemTypeCodeFor(MachineType type) { 330 if (type == MachineType::Int8()) { 331 return kMemI8; 332 } else if (type == MachineType::Uint8()) { 333 return kMemU8; 334 } else if (type == MachineType::Int16()) { 335 return kMemI16; 336 } else if (type == MachineType::Uint16()) { 337 return kMemU16; 338 } else if (type == MachineType::Int32()) { 339 return kMemI32; 340 } else if (type == MachineType::Uint32()) { 341 return kMemU32; 342 } else if (type == MachineType::Int64()) { 343 return kMemI64; 344 } else if (type == MachineType::Uint64()) { 345 return kMemU64; 346 } else if (type == MachineType::Float32()) { 347 return kMemF32; 348 } else if (type == MachineType::Float64()) { 349 return kMemF64; 350 } else { 351 UNREACHABLE(); 352 return kMemI32; 353 } 354 } 355 356 static MachineType MachineTypeFor(LocalType type) { 357 switch (type) { 358 case kAstI32: 359 return MachineType::Int32(); 360 case kAstI64: 361 return MachineType::Int64(); 362 case kAstF32: 363 return MachineType::Float32(); 364 case kAstF64: 365 return MachineType::Float64(); 366 case kAstStmt: 367 return MachineType::None(); 368 default: 369 UNREACHABLE(); 370 return MachineType::None(); 371 } 372 } 373 374 static LocalType LocalTypeFor(MachineType type) { 375 if (type == MachineType::Int8()) { 376 return kAstI32; 377 } else if (type == MachineType::Uint8()) { 378 return kAstI32; 379 } else if (type == MachineType::Int16()) { 380 return kAstI32; 381 } else if (type == MachineType::Uint16()) { 382 return kAstI32; 383 } else if (type == MachineType::Int32()) { 384 return kAstI32; 385 } else if (type == MachineType::Uint32()) { 386 return kAstI32; 387 } else if (type == MachineType::Int64()) { 388 return kAstI64; 389 } else if (type == MachineType::Uint64()) { 390 return kAstI64; 391 } else if (type == MachineType::Float32()) { 392 return kAstF32; 393 } else if (type == MachineType::Float64()) { 394 return kAstF64; 395 } else { 396 UNREACHABLE(); 397 return kAstI32; 398 } 399 } 400 401 // TODO(titzer): remove this method 402 static WasmOpcode LoadStoreOpcodeOf(MachineType type, bool store) { 403 if (type == MachineType::Int8()) { 404 return store ? kExprI32StoreMem8 : kExprI32LoadMem8S; 405 } else if (type == MachineType::Uint8()) { 406 return store ? kExprI32StoreMem8 : kExprI32LoadMem8U; 407 } else if (type == MachineType::Int16()) { 408 return store ? kExprI32StoreMem16 : kExprI32LoadMem16S; 409 } else if (type == MachineType::Uint16()) { 410 return store ? kExprI32StoreMem16 : kExprI32LoadMem16U; 411 } else if (type == MachineType::Int32()) { 412 return store ? kExprI32StoreMem : kExprI32LoadMem; 413 } else if (type == MachineType::Uint32()) { 414 return store ? kExprI32StoreMem : kExprI32LoadMem; 415 } else if (type == MachineType::Int64()) { 416 return store ? kExprI64StoreMem : kExprI64LoadMem; 417 } else if (type == MachineType::Uint64()) { 418 return store ? kExprI64StoreMem : kExprI64LoadMem; 419 } else if (type == MachineType::Float32()) { 420 return store ? kExprF32StoreMem : kExprF32LoadMem; 421 } else if (type == MachineType::Float64()) { 422 return store ? kExprF64StoreMem : kExprF64LoadMem; 423 } else { 424 UNREACHABLE(); 425 return kExprNop; 426 } 427 } 428 429 static byte LoadStoreAccessOf(bool with_offset) { 430 return MemoryAccess::OffsetField::encode(with_offset); 431 } 432 433 static char ShortNameOf(LocalType type) { 434 switch (type) { 435 case kAstI32: 436 return 'i'; 437 case kAstI64: 438 return 'l'; 439 case kAstF32: 440 return 'f'; 441 case kAstF64: 442 return 'd'; 443 case kAstStmt: 444 return 'v'; 445 case kAstEnd: 446 return 'x'; 447 default: 448 UNREACHABLE(); 449 return '?'; 450 } 451 } 452 453 static const char* TypeName(LocalType type) { 454 switch (type) { 455 case kAstI32: 456 return "i32"; 457 case kAstI64: 458 return "i64"; 459 case kAstF32: 460 return "f32"; 461 case kAstF64: 462 return "f64"; 463 case kAstStmt: 464 return "<stmt>"; 465 case kAstEnd: 466 return "<end>"; 467 default: 468 return "<unknown>"; 469 } 470 } 471 }; 472 } // namespace wasm 473 } // namespace internal 474 } // namespace v8 475 476 #endif // V8_WASM_OPCODES_H_ 477
