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runtime: adjust known metadata for SIMD vector types #20113

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merged 1 commit into from
Oct 29, 2018
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runtime: adjust known metadata for SIMD vector types #20113

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56 changes: 37 additions & 19 deletions stdlib/public/runtime/KnownMetadata.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -104,11 +104,16 @@ namespace pointer_types {
}

namespace {
template<typename T>
constexpr size_t getAlignment() { return alignof(T); }
template <typename T>
struct BuiltinType {
static constexpr const size_t Alignment = alignof(T);
};

#define SET_FIXED_ALIGNMENT(Type, Align) \
template<> constexpr size_t getAlignment<Type>() { return Align; }
#define SET_FIXED_ALIGNMENT(Type, Align) \
template <> \
struct BuiltinType<Type> { \
static constexpr const size_t Alignment = Align; \
};

SET_FIXED_ALIGNMENT(uint8_t, 1)
SET_FIXED_ALIGNMENT(uint16_t, 2)
Expand All @@ -120,27 +125,40 @@ template<> constexpr size_t getAlignment<Type>() { return Align; }

#undef SET_FIXED_ALIGNMENT

template<typename T, unsigned N>
struct SwiftVecT {
typedef T type __attribute__((ext_vector_type(N)));
template <typename T, unsigned N>
struct SIMDVector {
using Type = T __attribute__((__ext_vector_type__(N)));
};

template<typename T, unsigned N>
using SwiftVec = typename SwiftVecT<T, N>::type;
template <>
struct SIMDVector<float, 3> {
using Type = float __attribute__((__ext_vector_type__(4)));
};

template <>
struct SIMDVector<double, 3> {
using Type = double __attribute__((__ext_vector_type__(4)));
};

template <typename T, unsigned N>
using SIMDVectorType = typename SIMDVector<T, N>::Type;
}

#define BUILTIN_TYPE(Symbol, Name) \
const ValueWitnessTable swift::VALUE_WITNESS_SYM(Symbol) = \
ValueWitnessTableForBox<NativeBox<ctypes::Symbol, \
getAlignment<ctypes::Symbol>()>>::table;
#define BUILTIN_TYPE(Symbol, Name) \
const ValueWitnessTable swift::VALUE_WITNESS_SYM(Symbol) = \
ValueWitnessTableForBox<NativeBox<ctypes::Symbol, \
BuiltinType<ctypes::Symbol>::Alignment>>::table;

#define BUILTIN_POINTER_TYPE(Symbol, Name) \
const ExtraInhabitantsValueWitnessTable swift::VALUE_WITNESS_SYM(Symbol) = \
const ExtraInhabitantsValueWitnessTable swift::VALUE_WITNESS_SYM(Symbol) = \
ValueWitnessTableForBox<pointer_types::Symbol>::table;
#define BUILTIN_VECTOR_TYPE(ElementSymbol, _, Width) \
const ValueWitnessTable \
swift::VALUE_WITNESS_SYM(VECTOR_BUILTIN_SYMBOL_NAME(ElementSymbol,Width)) = \
ValueWitnessTableForBox<NativeBox<SwiftVec<ctypes::ElementSymbol, \
Width>>>::table;

#define BUILTIN_VECTOR_TYPE(ElementSymbol, _, Width) \
const ValueWitnessTable \
swift::VALUE_WITNESS_SYM(VECTOR_BUILTIN_SYMBOL_NAME(ElementSymbol,Width)) = \
ValueWitnessTableForBox<NativeBox<SIMDVectorType<ctypes::ElementSymbol, \
Width>>>::table;

#include "swift/Runtime/BuiltinTypes.def"

/// The value-witness table for pointer-aligned unmanaged pointer types.
Expand Down