| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/wasm/wasm-opcodes.h" |
| #include "src/signature.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace wasm { |
| |
| typedef Signature<LocalType> FunctionSig; |
| |
| const char* WasmOpcodes::OpcodeName(WasmOpcode opcode) { |
| switch (opcode) { |
| #define DECLARE_NAME_CASE(name, opcode, sig) \ |
| case kExpr##name: \ |
| return "Expr" #name; |
| FOREACH_OPCODE(DECLARE_NAME_CASE) |
| #undef DECLARE_NAME_CASE |
| default: |
| break; |
| } |
| return "Unknown"; |
| } |
| |
| |
| std::ostream& operator<<(std::ostream& os, const FunctionSig& sig) { |
| if (sig.return_count() == 0) os << "v"; |
| for (size_t i = 0; i < sig.return_count(); i++) { |
| os << WasmOpcodes::ShortNameOf(sig.GetReturn(i)); |
| } |
| os << "_"; |
| if (sig.parameter_count() == 0) os << "v"; |
| for (size_t i = 0; i < sig.parameter_count(); i++) { |
| os << WasmOpcodes::ShortNameOf(sig.GetParam(i)); |
| } |
| return os; |
| } |
| |
| |
| #define DECLARE_SIG_ENUM(name, ...) kSigEnum_##name, |
| |
| |
| enum WasmOpcodeSig { FOREACH_SIGNATURE(DECLARE_SIG_ENUM) }; |
| |
| |
| // TODO(titzer): not static-initializer safe. Wrap in LazyInstance. |
| #define DECLARE_SIG(name, ...) \ |
| static LocalType kTypes_##name[] = {__VA_ARGS__}; \ |
| static const FunctionSig kSig_##name( \ |
| 1, static_cast<int>(arraysize(kTypes_##name)) - 1, kTypes_##name); |
| |
| FOREACH_SIGNATURE(DECLARE_SIG) |
| |
| #define DECLARE_SIG_ENTRY(name, ...) &kSig_##name, |
| |
| static const FunctionSig* kSimpleExprSigs[] = { |
| nullptr, FOREACH_SIGNATURE(DECLARE_SIG_ENTRY)}; |
| |
| static byte kSimpleExprSigTable[256]; |
| |
| |
| // Initialize the signature table. |
| static void InitSigTable() { |
| #define SET_SIG_TABLE(name, opcode, sig) \ |
| kSimpleExprSigTable[opcode] = static_cast<int>(kSigEnum_##sig) + 1; |
| FOREACH_SIMPLE_OPCODE(SET_SIG_TABLE); |
| #undef SET_SIG_TABLE |
| } |
| |
| |
| FunctionSig* WasmOpcodes::Signature(WasmOpcode opcode) { |
| // TODO(titzer): use LazyInstance to make this thread safe. |
| if (kSimpleExprSigTable[kExprI32Add] == 0) InitSigTable(); |
| return const_cast<FunctionSig*>( |
| kSimpleExprSigs[kSimpleExprSigTable[static_cast<byte>(opcode)]]); |
| } |
| |
| |
| // TODO(titzer): pull WASM_64 up to a common header. |
| #if !V8_TARGET_ARCH_32_BIT || V8_TARGET_ARCH_X64 |
| #define WASM_64 1 |
| #else |
| #define WASM_64 0 |
| #endif |
| |
| |
| bool WasmOpcodes::IsSupported(WasmOpcode opcode) { |
| #if !WASM_64 |
| switch (opcode) { |
| // Opcodes not supported on 32-bit platforms. |
| case kExprI64Add: |
| case kExprI64Sub: |
| case kExprI64Mul: |
| case kExprI64DivS: |
| case kExprI64DivU: |
| case kExprI64RemS: |
| case kExprI64RemU: |
| case kExprI64And: |
| case kExprI64Ior: |
| case kExprI64Xor: |
| case kExprI64Shl: |
| case kExprI64ShrU: |
| case kExprI64ShrS: |
| case kExprI64Eq: |
| case kExprI64Ne: |
| case kExprI64LtS: |
| case kExprI64LeS: |
| case kExprI64LtU: |
| case kExprI64LeU: |
| case kExprI64GtS: |
| case kExprI64GeS: |
| case kExprI64GtU: |
| case kExprI64GeU: |
| |
| case kExprI32ConvertI64: |
| case kExprI64SConvertI32: |
| case kExprI64UConvertI32: |
| |
| case kExprF64ReinterpretI64: |
| case kExprI64ReinterpretF64: |
| |
| case kExprI64Clz: |
| case kExprI64Ctz: |
| case kExprI64Popcnt: |
| |
| case kExprF32SConvertI64: |
| case kExprF32UConvertI64: |
| case kExprF64SConvertI64: |
| case kExprF64UConvertI64: |
| case kExprI64SConvertF32: |
| case kExprI64SConvertF64: |
| case kExprI64UConvertF32: |
| case kExprI64UConvertF64: |
| |
| return false; |
| default: |
| return true; |
| } |
| #else |
| return true; |
| #endif |
| } |
| } // namespace wasm |
| } // namespace internal |
| } // namespace v8 |