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/*
* Copyright 2019 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_features_h
#define wasm_features_h
#include <stdint.h>
#include <string>
#include "compiler-support.h"
#include "support/utilities.h"
namespace wasm {
struct FeatureSet {
enum Feature : uint32_t {
// These features are intended to those documented in tool-conventions:
// https://github.com/WebAssembly/tool-conventions/blob/main/Linking.md#target-features-section
None = 0,
Atomics = 1 << 0,
MutableGlobals = 1 << 1,
TruncSat = 1 << 2,
SIMD = 1 << 3,
BulkMemory = 1 << 4,
SignExt = 1 << 5,
ExceptionHandling = 1 << 6,
TailCall = 1 << 7,
ReferenceTypes = 1 << 8,
Multivalue = 1 << 9,
GC = 1 << 10,
Memory64 = 1 << 11,
RelaxedSIMD = 1 << 12,
ExtendedConst = 1 << 13,
Strings = 1 << 14,
MultiMemory = 1 << 15,
TypedContinuations = 1 << 16,
SharedEverything = 1 << 17,
FP16 = 1 << 18,
BulkMemoryOpt = 1 << 19, // Just the memory.copy and fill operations
// This features is a no-op for compatibility. Having it in this list means
// that we can automatically generate tool flags that set it, but otherwise
// it does nothing. Binaryen always accepts LEB call-indirect encodings.
CallIndirectOverlong = 1 << 20,
MVP = None,
// Keep in sync with llvm default features:
// https://github.com/llvm/llvm-project/blob/c7576cb89d6c95f03968076e902d3adfd1996577/clang/lib/Basic/Targets/WebAssembly.cpp#L150-L153
Default = SignExt | MutableGlobals,
All = (1 << 21) - 1,
};
static std::string toString(Feature f) {
switch (f) {
case Atomics:
return "threads";
case MutableGlobals:
return "mutable-globals";
case TruncSat:
return "nontrapping-float-to-int";
case SIMD:
return "simd";
case BulkMemory:
return "bulk-memory";
case SignExt:
return "sign-ext";
case ExceptionHandling:
return "exception-handling";
case TailCall:
return "tail-call";
case ReferenceTypes:
return "reference-types";
case Multivalue:
return "multivalue";
case GC:
return "gc";
case Memory64:
return "memory64";
case RelaxedSIMD:
return "relaxed-simd";
case ExtendedConst:
return "extended-const";
case Strings:
return "strings";
case MultiMemory:
return "multimemory";
case TypedContinuations:
return "typed-continuations";
case SharedEverything:
return "shared-everything";
case FP16:
return "fp16";
case BulkMemoryOpt:
return "bulk-memory-opt";
case CallIndirectOverlong:
return "call-indirect-overlong";
default:
WASM_UNREACHABLE("unexpected feature");
}
}
std::string toString() const {
std::string ret;
uint32_t x = 1;
while (x & Feature::All) {
if (features & x) {
if (!ret.empty()) {
ret += ", ";
}
ret += toString(Feature(x));
}
x <<= 1;
}
return ret;
}
FeatureSet() : features(None) {}
FeatureSet(uint32_t features) : features(features) {}
operator uint32_t() const { return features; }
bool isMVP() const { return features == MVP; }
bool has(FeatureSet f) const { return (features & f) == f.features; }
bool hasAtomics() const { return (features & Atomics) != 0; }
bool hasMutableGlobals() const { return (features & MutableGlobals) != 0; }
bool hasTruncSat() const { return (features & TruncSat) != 0; }
bool hasSIMD() const { return (features & SIMD) != 0; }
bool hasBulkMemory() const { return (features & BulkMemory) != 0; }
bool hasSignExt() const { return (features & SignExt) != 0; }
bool hasExceptionHandling() const {
return (features & ExceptionHandling) != 0;
}
bool hasTailCall() const { return (features & TailCall) != 0; }
bool hasReferenceTypes() const { return (features & ReferenceTypes) != 0; }
bool hasMultivalue() const { return (features & Multivalue) != 0; }
bool hasGC() const { return (features & GC) != 0; }
bool hasMemory64() const { return (features & Memory64) != 0; }
bool hasRelaxedSIMD() const { return (features & RelaxedSIMD) != 0; }
bool hasExtendedConst() const { return (features & ExtendedConst) != 0; }
bool hasStrings() const { return (features & Strings) != 0; }
bool hasMultiMemory() const { return (features & MultiMemory) != 0; }
bool hasTypedContinuations() const {
return (features & TypedContinuations) != 0;
}
bool hasSharedEverything() const {
return (features & SharedEverything) != 0;
}
bool hasFP16() const { return (features & FP16) != 0; }
bool hasBulkMemoryOpt() const {
bool has = (features & BulkMemoryOpt) != 0;
assert(has || !hasBulkMemory());
return has;
}
bool hasAll() const { return (features & All) != 0; }
void set(FeatureSet f, bool v = true) {
features = v ? (features | f) : (features & ~f);
}
void setAtomics(bool v = true) { set(Atomics, v); }
void setMutableGlobals(bool v = true) { set(MutableGlobals, v); }
void setTruncSat(bool v = true) { set(TruncSat, v); }
void setSIMD(bool v = true) { set(SIMD, v); }
void setBulkMemory(bool v = true) { set(BulkMemory, v); }
void setSignExt(bool v = true) { set(SignExt, v); }
void setExceptionHandling(bool v = true) { set(ExceptionHandling, v); }
void setTailCall(bool v = true) { set(TailCall, v); }
void setReferenceTypes(bool v = true) { set(ReferenceTypes, v); }
void setMultivalue(bool v = true) { set(Multivalue, v); }
void setGC(bool v = true) { set(GC, v); }
void setMemory64(bool v = true) { set(Memory64, v); }
void setRelaxedSIMD(bool v = true) { set(RelaxedSIMD, v); }
void setExtendedConst(bool v = true) { set(ExtendedConst, v); }
void setStrings(bool v = true) { set(Strings, v); }
void setMultiMemory(bool v = true) { set(MultiMemory, v); }
void setTypedContinuations(bool v = true) { set(TypedContinuations, v); }
void setSharedEverything(bool v = true) { set(SharedEverything, v); }
void setFP16(bool v = true) { set(FP16, v); }
void setBulkMemoryOpt(bool v = true) { set(BulkMemoryOpt, v); }
void setMVP() { features = MVP; }
void setAll() { features = All; }
void enable(const FeatureSet& other) { features |= other.features; }
void disable(const FeatureSet& other) { features &= ~other.features; }
template<typename F> void iterFeatures(F f) const {
for (uint32_t feature = MVP + 1; feature < All; feature <<= 1) {
if (has(feature)) {
f(static_cast<Feature>(feature));
}
}
}
bool operator<=(const FeatureSet& other) const {
return !(features & ~other.features);
}
bool operator==(const FeatureSet& other) const {
return *this <= other && other <= *this;
}
bool operator!=(const FeatureSet& other) const { return !(*this == other); }
FeatureSet& operator|=(const FeatureSet& other) {
features |= other.features;
return *this;
}
FeatureSet operator-(const FeatureSet& other) const {
return features & ~other.features;
}
FeatureSet operator-(Feature other) const {
return *this - FeatureSet(other);
}
uint32_t features;
};
} // namespace wasm
#endif // wasm_features_h
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