Line data Source code
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 : #ifndef SRC_ASMJS_ASM_TYPES_H_
6 : #define SRC_ASMJS_ASM_TYPES_H_
7 :
8 : #include <string>
9 :
10 : #include "src/base/compiler-specific.h"
11 : #include "src/base/macros.h"
12 : #include "src/globals.h"
13 : #include "src/zone/zone-containers.h"
14 : #include "src/zone/zone.h"
15 :
16 : namespace v8 {
17 : namespace internal {
18 : namespace wasm {
19 :
20 : class AsmType;
21 : class AsmFFIType;
22 : class AsmFunctionType;
23 : class AsmOverloadedFunctionType;
24 : class AsmFunctionTableType;
25 :
26 : // List of V(CamelName, string_name, number, parent_types)
27 : #define FOR_EACH_ASM_VALUE_TYPE_LIST(V) \
28 : /* These tags are not types that are expressable in the asm source. They */ \
29 : /* are used to express semantic information about the types they tag. */ \
30 : V(Heap, "[]", 1, 0) \
31 : V(FloatishDoubleQ, "floatish|double?", 2, 0) \
32 : V(FloatQDoubleQ, "float?|double?", 3, 0) \
33 : /* The following are actual types that appear in the asm source. */ \
34 : V(Void, "void", 4, 0) \
35 : V(Extern, "extern", 5, 0) \
36 : V(DoubleQ, "double?", 6, kAsmFloatishDoubleQ | kAsmFloatQDoubleQ) \
37 : V(Double, "double", 7, kAsmDoubleQ | kAsmExtern) \
38 : V(Intish, "intish", 8, 0) \
39 : V(Int, "int", 9, kAsmIntish) \
40 : V(Signed, "signed", 10, kAsmInt | kAsmExtern) \
41 : V(Unsigned, "unsigned", 11, kAsmInt) \
42 : V(FixNum, "fixnum", 12, kAsmSigned | kAsmUnsigned) \
43 : V(Floatish, "floatish", 13, kAsmFloatishDoubleQ) \
44 : V(FloatQ, "float?", 14, kAsmFloatQDoubleQ | kAsmFloatish) \
45 : V(Float, "float", 15, kAsmFloatQ) \
46 : /* Types used for expressing the Heap accesses. */ \
47 : V(Uint8Array, "Uint8Array", 16, kAsmHeap) \
48 : V(Int8Array, "Int8Array", 17, kAsmHeap) \
49 : V(Uint16Array, "Uint16Array", 18, kAsmHeap) \
50 : V(Int16Array, "Int16Array", 19, kAsmHeap) \
51 : V(Uint32Array, "Uint32Array", 20, kAsmHeap) \
52 : V(Int32Array, "Int32Array", 21, kAsmHeap) \
53 : V(Float32Array, "Float32Array", 22, kAsmHeap) \
54 : V(Float64Array, "Float64Array", 23, kAsmHeap) \
55 : /* None is used to represent errors in the type checker. */ \
56 : V(None, "<none>", 31, 0)
57 :
58 : // List of V(CamelName)
59 : #define FOR_EACH_ASM_CALLABLE_TYPE_LIST(V) \
60 : V(FunctionType) \
61 : V(FFIType) \
62 : V(OverloadedFunctionType) \
63 : V(FunctionTableType)
64 :
65 : class AsmValueType {
66 : public:
67 : typedef uint32_t bitset_t;
68 :
69 : enum : uint32_t {
70 : #define DEFINE_TAG(CamelName, string_name, number, parent_types) \
71 : kAsm##CamelName = ((1u << (number)) | (parent_types)),
72 : FOR_EACH_ASM_VALUE_TYPE_LIST(DEFINE_TAG)
73 : #undef DEFINE_TAG
74 : kAsmUnknown = 0,
75 : kAsmValueTypeTag = 1u
76 : };
77 :
78 : private:
79 : friend class AsmType;
80 :
81 : static AsmValueType* AsValueType(AsmType* type) {
82 23930350 : if ((reinterpret_cast<uintptr_t>(type) & kAsmValueTypeTag) ==
83 : kAsmValueTypeTag) {
84 : return reinterpret_cast<AsmValueType*>(type);
85 : }
86 : return nullptr;
87 : }
88 :
89 : bitset_t Bitset() const {
90 : DCHECK((reinterpret_cast<uintptr_t>(this) & kAsmValueTypeTag) ==
91 : kAsmValueTypeTag);
92 : return static_cast<bitset_t>(reinterpret_cast<uintptr_t>(this) &
93 6146350 : ~kAsmValueTypeTag);
94 : }
95 :
96 : static AsmType* New(bitset_t bits) {
97 : DCHECK_EQ((bits & kAsmValueTypeTag), 0u);
98 : return reinterpret_cast<AsmType*>(
99 : static_cast<uintptr_t>(bits | kAsmValueTypeTag));
100 : }
101 :
102 : // AsmValueTypes can't be created except through AsmValueType::New.
103 : DISALLOW_IMPLICIT_CONSTRUCTORS(AsmValueType);
104 : };
105 :
106 : class V8_EXPORT_PRIVATE AsmCallableType : public NON_EXPORTED_BASE(ZoneObject) {
107 : public:
108 : virtual std::string Name() = 0;
109 :
110 : virtual bool CanBeInvokedWith(AsmType* return_type,
111 : const ZoneVector<AsmType*>& args) = 0;
112 :
113 : #define DECLARE_CAST(CamelName) \
114 : virtual Asm##CamelName* As##CamelName() { return nullptr; }
115 57965 : FOR_EACH_ASM_CALLABLE_TYPE_LIST(DECLARE_CAST)
116 : #undef DECLARE_CAST
117 :
118 : protected:
119 9611593 : AsmCallableType() = default;
120 0 : virtual ~AsmCallableType() = default;
121 : virtual bool IsA(AsmType* other);
122 :
123 : private:
124 : friend class AsmType;
125 :
126 : DISALLOW_COPY_AND_ASSIGN(AsmCallableType);
127 : };
128 :
129 0 : class V8_EXPORT_PRIVATE AsmFunctionType final : public AsmCallableType {
130 : public:
131 5751825 : AsmFunctionType* AsFunctionType() final { return this; }
132 :
133 5718547 : void AddArgument(AsmType* type) { args_.push_back(type); }
134 : const ZoneVector<AsmType*> Arguments() const { return args_; }
135 : AsmType* ReturnType() const { return return_type_; }
136 :
137 : bool CanBeInvokedWith(AsmType* return_type,
138 : const ZoneVector<AsmType*>& args) override;
139 :
140 : protected:
141 : AsmFunctionType(Zone* zone, AsmType* return_type)
142 4281342 : : return_type_(return_type), args_(zone) {}
143 :
144 : private:
145 : friend AsmType;
146 :
147 : std::string Name() override;
148 : bool IsA(AsmType* other) override;
149 :
150 : AsmType* return_type_;
151 : ZoneVector<AsmType*> args_;
152 :
153 : DISALLOW_COPY_AND_ASSIGN(AsmFunctionType);
154 : };
155 :
156 0 : class V8_EXPORT_PRIVATE AsmOverloadedFunctionType final
157 : : public AsmCallableType {
158 : public:
159 5679858 : AsmOverloadedFunctionType* AsOverloadedFunctionType() override {
160 5679858 : return this;
161 : }
162 :
163 : void AddOverload(AsmType* overload);
164 :
165 : private:
166 : friend AsmType;
167 :
168 2129948 : explicit AsmOverloadedFunctionType(Zone* zone) : overloads_(zone) {}
169 :
170 : std::string Name() override;
171 : bool CanBeInvokedWith(AsmType* return_type,
172 : const ZoneVector<AsmType*>& args) override;
173 :
174 : ZoneVector<AsmType*> overloads_;
175 :
176 : DISALLOW_IMPLICIT_CONSTRUCTORS(AsmOverloadedFunctionType);
177 : };
178 :
179 0 : class V8_EXPORT_PRIVATE AsmFFIType final : public AsmCallableType {
180 : public:
181 16145 : AsmFFIType* AsFFIType() override { return this; }
182 :
183 1 : std::string Name() override { return "Function"; }
184 : bool CanBeInvokedWith(AsmType* return_type,
185 : const ZoneVector<AsmType*>& args) override;
186 :
187 : private:
188 : friend AsmType;
189 :
190 358819 : AsmFFIType() = default;
191 :
192 : DISALLOW_COPY_AND_ASSIGN(AsmFFIType);
193 : };
194 :
195 0 : class V8_EXPORT_PRIVATE AsmFunctionTableType : public AsmCallableType {
196 : public:
197 1533 : AsmFunctionTableType* AsFunctionTableType() override { return this; }
198 :
199 : std::string Name() override;
200 :
201 : bool CanBeInvokedWith(AsmType* return_type,
202 : const ZoneVector<AsmType*>& args) override;
203 :
204 : size_t length() const { return length_; }
205 : AsmType* signature() { return signature_; }
206 :
207 : private:
208 : friend class AsmType;
209 :
210 : AsmFunctionTableType(size_t length, AsmType* signature);
211 :
212 : size_t length_;
213 : AsmType* signature_;
214 :
215 : DISALLOW_IMPLICIT_CONSTRUCTORS(AsmFunctionTableType);
216 : };
217 :
218 : class V8_EXPORT_PRIVATE AsmType {
219 : public:
220 : #define DEFINE_CONSTRUCTOR(CamelName, string_name, number, parent_types) \
221 : static AsmType* CamelName() { \
222 : return AsmValueType::New(AsmValueType::kAsm##CamelName); \
223 : }
224 : FOR_EACH_ASM_VALUE_TYPE_LIST(DEFINE_CONSTRUCTOR)
225 : #undef DEFINE_CONSTRUCTOR
226 :
227 : #define DEFINE_CAST(CamelCase) \
228 : Asm##CamelCase* As##CamelCase() { \
229 : if (AsValueType() != nullptr) { \
230 : return nullptr; \
231 : } \
232 : return reinterpret_cast<AsmCallableType*>(this)->As##CamelCase(); \
233 : }
234 11492890 : FOR_EACH_ASM_CALLABLE_TYPE_LIST(DEFINE_CAST)
235 : #undef DEFINE_CAST
236 : AsmValueType* AsValueType() { return AsmValueType::AsValueType(this); }
237 : AsmCallableType* AsCallableType();
238 :
239 : // A function returning ret. Callers still need to invoke AddArgument with the
240 : // returned type to fully create this type.
241 4281338 : static AsmType* Function(Zone* zone, AsmType* ret) {
242 : AsmFunctionType* f = new (zone) AsmFunctionType(zone, ret);
243 4281342 : return reinterpret_cast<AsmType*>(f);
244 : }
245 :
246 : // Overloaded function types. Not creatable by asm source, but useful to
247 : // represent the overloaded stdlib functions.
248 2129947 : static AsmType* OverloadedFunction(Zone* zone) {
249 : auto* f = new (zone) AsmOverloadedFunctionType(zone);
250 2129948 : return reinterpret_cast<AsmType*>(f);
251 : }
252 :
253 : // The type for fround(src).
254 : static AsmType* FroundType(Zone* zone);
255 :
256 : // The (variadic) type for min and max.
257 : static AsmType* MinMaxType(Zone* zone, AsmType* dest, AsmType* src);
258 :
259 : // The type for foreign functions.
260 : static AsmType* FFIType(Zone* zone) {
261 358819 : auto* f = new (zone) AsmFFIType();
262 : return reinterpret_cast<AsmType*>(f);
263 : }
264 :
265 : // The type for function tables.
266 : static AsmType* FunctionTableType(Zone* zone, size_t length,
267 : AsmType* signature) {
268 292 : auto* f = new (zone) AsmFunctionTableType(length, signature);
269 : return reinterpret_cast<AsmType*>(f);
270 : }
271 :
272 : std::string Name();
273 : // IsExactly returns true if this is the exact same type as that. For
274 : // non-value types (e.g., callables), this returns this == that.
275 : bool IsExactly(AsmType* that);
276 : // IsA is used to query whether this is an instance of that (i.e., if this is
277 : // a type derived from that.) For non-value types (e.g., callables), this
278 : // returns this == that.
279 : bool IsA(AsmType* that);
280 :
281 : // Types allowed in return statements. void is the type for returns without
282 : // an expression.
283 : bool IsReturnType() {
284 38 : return this == AsmType::Void() || this == AsmType::Double() ||
285 64 : this == AsmType::Signed() || this == AsmType::Float();
286 : }
287 :
288 : // Converts this to the corresponding valid argument type.
289 : AsmType* ToReturnType() {
290 : if (this->IsA(AsmType::Signed())) {
291 : return AsmType::Signed();
292 : }
293 : if (this->IsA(AsmType::Double())) {
294 : return AsmType::Double();
295 : }
296 : if (this->IsA(AsmType::Float())) {
297 : return AsmType::Float();
298 : }
299 : if (this->IsA(AsmType::Void())) {
300 : return AsmType::Void();
301 : }
302 : return AsmType::None();
303 : }
304 :
305 : // Types allowed to be parameters in asm functions.
306 : bool IsParameterType() {
307 : return this == AsmType::Double() || this == AsmType::Int() ||
308 : this == AsmType::Float();
309 : }
310 :
311 : // Converts this to the corresponding valid argument type.
312 6521 : AsmType* ToParameterType() {
313 6521 : if (this->IsA(AsmType::Int())) {
314 : return AsmType::Int();
315 : }
316 162 : if (this->IsA(AsmType::Double())) {
317 : return AsmType::Double();
318 : }
319 21 : if (this->IsA(AsmType::Float())) {
320 : return AsmType::Float();
321 : }
322 0 : return AsmType::None();
323 : }
324 :
325 : // Types allowed to be compared using the comparison operators.
326 : bool IsComparableType() {
327 : return this == AsmType::Double() || this == AsmType::Signed() ||
328 : this == AsmType::Unsigned() || this == AsmType::Float();
329 : }
330 :
331 : // The following methods are meant to be used for inspecting the traits of
332 : // element types for the heap view types.
333 : enum : int32_t { kNotHeapType = -1 };
334 :
335 : // Returns the element size if this is a heap type. Otherwise returns
336 : // kNotHeapType.
337 : int32_t ElementSizeInBytes();
338 : // Returns the load type if this is a heap type. AsmType::None is returned if
339 : // this is not a heap type.
340 : AsmType* LoadType();
341 : // Returns the store type if this is a heap type. AsmType::None is returned if
342 : // this is not a heap type.
343 : AsmType* StoreType();
344 : };
345 :
346 : } // namespace wasm
347 : } // namespace internal
348 : } // namespace v8
349 :
350 : #endif // SRC_ASMJS_ASM_TYPES_H_
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