Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1 | // Copyright 2016 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 | #include "src/v8.h" |
| 6 | |
| 7 | #include "src/wasm/asm-types.h" |
| 8 | |
| 9 | namespace v8 { |
| 10 | namespace internal { |
| 11 | namespace wasm { |
| 12 | |
| 13 | AsmCallableType* AsmType::AsCallableType() { |
| 14 | if (AsValueType() != nullptr) { |
| 15 | return nullptr; |
| 16 | } |
| 17 | |
| 18 | DCHECK(this->AsFunctionType() != nullptr || |
| 19 | this->AsOverloadedFunctionType() != nullptr || |
| 20 | this->AsFFIType() != nullptr || |
| 21 | this->AsFunctionTableType() != nullptr); |
| 22 | return reinterpret_cast<AsmCallableType*>(this); |
| 23 | } |
| 24 | |
| 25 | std::string AsmType::Name() { |
| 26 | AsmValueType* avt = this->AsValueType(); |
| 27 | if (avt != nullptr) { |
| 28 | switch (avt->Bitset()) { |
| 29 | #define RETURN_TYPE_NAME(CamelName, string_name, number, parent_types) \ |
| 30 | case AsmValueType::kAsm##CamelName: \ |
| 31 | return string_name; |
| 32 | FOR_EACH_ASM_VALUE_TYPE_LIST(RETURN_TYPE_NAME) |
| 33 | #undef RETURN_TYPE_NAME |
| 34 | default: |
| 35 | UNREACHABLE(); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | return this->AsCallableType()->Name(); |
| 40 | } |
| 41 | |
| 42 | bool AsmType::IsExactly(AsmType* that) { |
| 43 | // TODO(jpp): maybe this can become this == that. |
| 44 | AsmValueType* avt = this->AsValueType(); |
| 45 | if (avt != nullptr) { |
| 46 | AsmValueType* tavt = that->AsValueType(); |
| 47 | if (tavt == nullptr) { |
| 48 | return false; |
| 49 | } |
| 50 | return avt->Bitset() == tavt->Bitset(); |
| 51 | } |
| 52 | |
| 53 | // TODO(jpp): is it useful to allow non-value types to be tested with |
| 54 | // IsExactly? |
| 55 | return that == this; |
| 56 | } |
| 57 | |
| 58 | bool AsmType::IsA(AsmType* that) { |
| 59 | // IsA is used for querying inheritance relationships. Therefore it is only |
| 60 | // meaningful for basic types. |
| 61 | AsmValueType* tavt = that->AsValueType(); |
| 62 | if (tavt != nullptr) { |
| 63 | AsmValueType* avt = this->AsValueType(); |
| 64 | if (avt == nullptr) { |
| 65 | return false; |
| 66 | } |
| 67 | return (avt->Bitset() & tavt->Bitset()) == tavt->Bitset(); |
| 68 | } |
| 69 | |
| 70 | // TODO(jpp): is it useful to allow non-value types to be tested with IsA? |
| 71 | return that == this; |
| 72 | } |
| 73 | |
| 74 | int32_t AsmType::ElementSizeInBytes() { |
| 75 | auto* value = AsValueType(); |
| 76 | if (value == nullptr) { |
| 77 | return AsmType::kNotHeapType; |
| 78 | } |
| 79 | switch (value->Bitset()) { |
| 80 | case AsmValueType::kAsmInt8Array: |
| 81 | case AsmValueType::kAsmUint8Array: |
| 82 | return 1; |
| 83 | case AsmValueType::kAsmInt16Array: |
| 84 | case AsmValueType::kAsmUint16Array: |
| 85 | return 2; |
| 86 | case AsmValueType::kAsmInt32Array: |
| 87 | case AsmValueType::kAsmUint32Array: |
| 88 | case AsmValueType::kAsmFloat32Array: |
| 89 | return 4; |
| 90 | case AsmValueType::kAsmFloat64Array: |
| 91 | return 8; |
| 92 | default: |
| 93 | return AsmType::kNotHeapType; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | AsmType* AsmType::LoadType() { |
| 98 | auto* value = AsValueType(); |
| 99 | if (value == nullptr) { |
| 100 | return AsmType::None(); |
| 101 | } |
| 102 | switch (value->Bitset()) { |
| 103 | case AsmValueType::kAsmInt8Array: |
| 104 | case AsmValueType::kAsmUint8Array: |
| 105 | case AsmValueType::kAsmInt16Array: |
| 106 | case AsmValueType::kAsmUint16Array: |
| 107 | case AsmValueType::kAsmInt32Array: |
| 108 | case AsmValueType::kAsmUint32Array: |
| 109 | return AsmType::Intish(); |
| 110 | case AsmValueType::kAsmFloat32Array: |
| 111 | return AsmType::FloatQ(); |
| 112 | case AsmValueType::kAsmFloat64Array: |
| 113 | return AsmType::DoubleQ(); |
| 114 | default: |
| 115 | return AsmType::None(); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | AsmType* AsmType::StoreType() { |
| 120 | auto* value = AsValueType(); |
| 121 | if (value == nullptr) { |
| 122 | return AsmType::None(); |
| 123 | } |
| 124 | switch (value->Bitset()) { |
| 125 | case AsmValueType::kAsmInt8Array: |
| 126 | case AsmValueType::kAsmUint8Array: |
| 127 | case AsmValueType::kAsmInt16Array: |
| 128 | case AsmValueType::kAsmUint16Array: |
| 129 | case AsmValueType::kAsmInt32Array: |
| 130 | case AsmValueType::kAsmUint32Array: |
| 131 | return AsmType::Intish(); |
| 132 | case AsmValueType::kAsmFloat32Array: |
| 133 | return AsmType::FloatishDoubleQ(); |
| 134 | case AsmValueType::kAsmFloat64Array: |
| 135 | return AsmType::FloatQDoubleQ(); |
| 136 | default: |
| 137 | return AsmType::None(); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | std::string AsmFunctionType::Name() { |
| 142 | if (IsFroundType()) { |
| 143 | return "fround"; |
| 144 | } |
| 145 | |
| 146 | std::string ret; |
| 147 | ret += "("; |
| 148 | for (size_t ii = 0; ii < args_.size(); ++ii) { |
| 149 | ret += args_[ii]->Name(); |
| 150 | if (ii != args_.size() - 1) { |
| 151 | ret += ", "; |
| 152 | } |
| 153 | } |
| 154 | if (IsMinMaxType()) { |
| 155 | DCHECK_EQ(args_.size(), 2); |
| 156 | ret += "..."; |
| 157 | } |
| 158 | ret += ") -> "; |
| 159 | ret += return_type_->Name(); |
| 160 | return ret; |
| 161 | } |
| 162 | |
| 163 | namespace { |
| 164 | class AsmFroundType final : public AsmFunctionType { |
| 165 | public: |
| 166 | bool IsFroundType() const override { return true; } |
| 167 | |
| 168 | private: |
| 169 | friend AsmType; |
| 170 | |
| 171 | explicit AsmFroundType(Zone* zone) |
| 172 | : AsmFunctionType(zone, AsmType::Float()) {} |
| 173 | |
| 174 | AsmType* ValidateCall(AsmType* return_type, |
| 175 | const ZoneVector<AsmType*>& args) override; |
| 176 | }; |
| 177 | } // namespace |
| 178 | |
| 179 | AsmType* AsmType::FroundType(Zone* zone) { |
| 180 | auto* Fround = new (zone) AsmFroundType(zone); |
| 181 | return reinterpret_cast<AsmType*>(Fround); |
| 182 | } |
| 183 | |
| 184 | AsmType* AsmFroundType::ValidateCall(AsmType* return_type, |
| 185 | const ZoneVector<AsmType*>& args) { |
| 186 | if (args.size() != 1) { |
| 187 | return AsmType::None(); |
| 188 | } |
| 189 | |
| 190 | auto* arg = args[0]; |
| 191 | if (!arg->IsA(AsmType::Floatish()) && !arg->IsA(AsmType::DoubleQ()) && |
| 192 | !arg->IsA(AsmType::Signed()) && !arg->IsA(AsmType::Unsigned())) { |
| 193 | return AsmType::None(); |
| 194 | } |
| 195 | |
| 196 | return AsmType::Float(); |
| 197 | } |
| 198 | |
| 199 | namespace { |
| 200 | class AsmMinMaxType final : public AsmFunctionType { |
| 201 | public: |
| 202 | bool IsMinMaxType() const override { return true; } |
| 203 | |
| 204 | private: |
| 205 | friend AsmType; |
| 206 | |
| 207 | AsmMinMaxType(Zone* zone, AsmType* dest, AsmType* src) |
| 208 | : AsmFunctionType(zone, dest) { |
| 209 | AddArgument(src); |
| 210 | AddArgument(src); |
| 211 | } |
| 212 | |
| 213 | AsmType* ValidateCall(AsmType* return_type, |
| 214 | const ZoneVector<AsmType*>& args) override { |
| 215 | if (!ReturnType()->IsExactly(return_type)) { |
| 216 | return AsmType::None(); |
| 217 | } |
| 218 | |
| 219 | if (args.size() < 2) { |
| 220 | return AsmType::None(); |
| 221 | } |
| 222 | |
| 223 | for (size_t ii = 0; ii < Arguments().size(); ++ii) { |
| 224 | if (!Arguments()[0]->IsExactly(args[ii])) { |
| 225 | return AsmType::None(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | return ReturnType(); |
| 230 | } |
| 231 | }; |
| 232 | } // namespace |
| 233 | |
| 234 | AsmType* AsmType::MinMaxType(Zone* zone, AsmType* dest, AsmType* src) { |
| 235 | DCHECK(dest->AsValueType() != nullptr); |
| 236 | DCHECK(src->AsValueType() != nullptr); |
| 237 | auto* MinMax = new (zone) AsmMinMaxType(zone, dest, src); |
| 238 | return reinterpret_cast<AsmType*>(MinMax); |
| 239 | } |
| 240 | |
| 241 | AsmType* AsmFFIType::ValidateCall(AsmType* return_type, |
| 242 | const ZoneVector<AsmType*>& args) { |
| 243 | for (size_t ii = 0; ii < args.size(); ++ii) { |
| 244 | if (!args[ii]->IsA(AsmType::Extern())) { |
| 245 | return AsmType::None(); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | return return_type; |
| 250 | } |
| 251 | |
| 252 | AsmType* AsmFunctionType::ValidateCall(AsmType* return_type, |
| 253 | const ZoneVector<AsmType*>& args) { |
| 254 | if (!return_type_->IsExactly(return_type)) { |
| 255 | return AsmType::None(); |
| 256 | } |
| 257 | |
| 258 | if (args_.size() != args.size()) { |
| 259 | return AsmType::None(); |
| 260 | } |
| 261 | |
| 262 | for (size_t ii = 0; ii < args_.size(); ++ii) { |
| 263 | if (!args_[ii]->IsExactly(args[ii])) { |
| 264 | return AsmType::None(); |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | return return_type_; |
| 269 | } |
| 270 | |
| 271 | std::string AsmOverloadedFunctionType::Name() { |
| 272 | std::string ret; |
| 273 | |
| 274 | for (size_t ii = 0; ii < overloads_.size(); ++ii) { |
| 275 | if (ii != 0) { |
| 276 | ret += " /\\ "; |
| 277 | } |
| 278 | ret += overloads_[ii]->Name(); |
| 279 | } |
| 280 | |
| 281 | return ret; |
| 282 | } |
| 283 | |
| 284 | AsmType* AsmOverloadedFunctionType::ValidateCall( |
| 285 | AsmType* return_type, const ZoneVector<AsmType*>& args) { |
| 286 | for (size_t ii = 0; ii < overloads_.size(); ++ii) { |
| 287 | auto* validated_type = |
| 288 | overloads_[ii]->AsCallableType()->ValidateCall(return_type, args); |
| 289 | if (validated_type != AsmType::None()) { |
| 290 | return validated_type; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | return AsmType::None(); |
| 295 | } |
| 296 | |
| 297 | void AsmOverloadedFunctionType::AddOverload(AsmType* overload) { |
| 298 | DCHECK(overload->AsFunctionType() != nullptr); |
| 299 | overloads_.push_back(overload); |
| 300 | } |
| 301 | |
| 302 | AsmFunctionTableType::AsmFunctionTableType(size_t length, AsmType* signature) |
| 303 | : length_(length), signature_(signature) { |
| 304 | DCHECK(signature_ != nullptr); |
| 305 | DCHECK(signature_->AsFunctionType() != nullptr); |
| 306 | } |
| 307 | |
| 308 | std::string AsmFunctionTableType::Name() { |
| 309 | return signature_->Name() + "[" + std::to_string(length_) + "]"; |
| 310 | } |
| 311 | |
| 312 | AsmType* AsmFunctionTableType::ValidateCall(AsmType* return_type, |
| 313 | const ZoneVector<AsmType*>& args) { |
| 314 | return signature_->AsCallableType()->ValidateCall(return_type, args); |
| 315 | } |
| 316 | |
| 317 | } // namespace wasm |
| 318 | } // namespace internal |
| 319 | } // namespace v8 |