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/*
* Copyright (c) 2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "Constraints.h"
#include "TypeStore.h"
namespace WGSL {
bool satisfies(const Type* type, Constraint constraint)
{
if (constraint == Constraints::None)
return true;
auto* primitive = std::get_if<Types::Primitive>(type);
if (!primitive) {
if (auto* reference = std::get_if<Types::Reference>(type))
return satisfies(reference->element, constraint);
return false;
}
switch (primitive->kind) {
case Types::Primitive::AbstractInt:
return constraint >= Constraints::AbstractInt;
case Types::Primitive::AbstractFloat:
return constraint & Constraints::Float;
case Types::Primitive::I32:
return constraint & Constraints::I32;
case Types::Primitive::U32:
return constraint & Constraints::U32;
case Types::Primitive::F32:
return constraint & Constraints::F32;
case Types::Primitive::F16:
return constraint & Constraints::F16;
case Types::Primitive::Bool:
return constraint & Constraints::Bool;
case Types::Primitive::Void:
case Types::Primitive::Sampler:
case Types::Primitive::SamplerComparison:
case Types::Primitive::TextureExternal:
case Types::Primitive::AccessMode:
case Types::Primitive::TexelFormat:
case Types::Primitive::AddressSpace:
return false;
}
}
const Type* satisfyOrPromote(const Type* type, Constraint constraint, const TypeStore& types)
{
if (constraint == Constraints::None)
return type;
auto* primitive = std::get_if<Types::Primitive>(type);
if (!primitive) {
if (auto* reference = std::get_if<Types::Reference>(type))
return satisfyOrPromote(reference->element, constraint, types);
return nullptr;
}
switch (primitive->kind) {
case Types::Primitive::AbstractInt:
if (constraint < Constraints::AbstractInt)
return nullptr;
if (constraint & Constraints::AbstractInt)
return type;
if (constraint & Constraints::I32)
return types.i32Type();
if (constraint & Constraints::U32)
return types.u32Type();
if (constraint & Constraints::AbstractFloat)
return types.abstractFloatType();
if (constraint & Constraints::F32)
return types.f32Type();
if (constraint & Constraints::F16)
return types.f16Type();
RELEASE_ASSERT_NOT_REACHED();
case Types::Primitive::AbstractFloat:
if (constraint < Constraints::AbstractFloat)
return nullptr;
if (constraint & Constraints::AbstractFloat)
return type;
if (constraint & Constraints::F32)
return types.f32Type();
if (constraint & Constraints::F16)
return types.f16Type();
RELEASE_ASSERT_NOT_REACHED();
case Types::Primitive::I32:
if (!(constraint & Constraints::I32))
return nullptr;
return type;
case Types::Primitive::U32:
if (!(constraint & Constraints::U32))
return nullptr;
return type;
case Types::Primitive::F32:
if (!(constraint & Constraints::F32))
return nullptr;
return type;
case Types::Primitive::F16:
if (!(constraint & Constraints::F16))
return nullptr;
return type;
case Types::Primitive::Bool:
if (!(constraint & Constraints::Bool))
return nullptr;
return type;
case Types::Primitive::Void:
case Types::Primitive::Sampler:
case Types::Primitive::SamplerComparison:
case Types::Primitive::TextureExternal:
case Types::Primitive::AccessMode:
case Types::Primitive::TexelFormat:
case Types::Primitive::AddressSpace:
return nullptr;
}
}
const Type* concretize(const Type* type, TypeStore& types)
{
using namespace Types;
return WTF::switchOn(*type,
[&](const Primitive&) -> const Type* {
return satisfyOrPromote(type, Constraints::ConcreteScalar, types);
},
[&](const Vector& vector) -> const Type* {
auto* element = concretize(vector.element, types);
if (!element)
return nullptr;
return types.vectorType(vector.size, element);
},
[&](const Matrix& matrix) -> const Type* {
auto* element = concretize(matrix.element, types);
if (!element)
return nullptr;
return types.matrixType(matrix.columns, matrix.rows, element);
},
[&](const Array& array) -> const Type* {
auto* element = concretize(array.element, types);
if (!element)
return nullptr;
return types.arrayType(element, array.size);
},
[&](const Struct&) -> const Type* {
return type;
},
[&](const PrimitiveStruct& primitiveStruct) -> const Type* {
switch (primitiveStruct.kind) {
case PrimitiveStruct::FrexpResult::kind: {
auto* fract = concretize(primitiveStruct.values[PrimitiveStruct::FrexpResult::fract], types);
auto* exp = concretize(primitiveStruct.values[PrimitiveStruct::FrexpResult::exp], types);
if (!fract || !exp)
return nullptr;
return types.frexpResultType(fract, exp);
}
case PrimitiveStruct::ModfResult::kind: {
auto* fract = concretize(primitiveStruct.values[PrimitiveStruct::ModfResult::fract], types);
auto* whole = concretize(primitiveStruct.values[PrimitiveStruct::ModfResult::whole], types);
if (!fract || !whole)
return nullptr;
return types.modfResultType(fract, whole);
}
case PrimitiveStruct::AtomicCompareExchangeResult::kind: {
return type;
}
}
},
[&](const Pointer&) -> const Type* {
return type;
},
[&](const Bottom&) -> const Type* {
return type;
},
[&](const Atomic&) -> const Type* {
return type;
},
[&](const Function&) -> const Type* {
return nullptr;
},
[&](const Texture&) -> const Type* {
return nullptr;
},
[&](const TextureStorage&) -> const Type* {
return nullptr;
},
[&](const TextureDepth&) -> const Type* {
return nullptr;
},
[&](const Reference&) -> const Type* {
return nullptr;
},
[&](const TypeConstructor&) -> const Type* {
return nullptr;
});
}
} // namespace WGSL
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