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//
// Copyright 2017 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Compile-time instances of many common TType values. These are looked up
// (statically or dynamically) through the methods defined in the namespace.
//
#ifndef COMPILER_TRANSLATOR_STATIC_TYPE_H_
#define COMPILER_TRANSLATOR_STATIC_TYPE_H_
#include "compiler/translator/Types.h"
namespace sh
{
namespace StaticType
{
namespace Helpers
{
//
// Generation and static allocation of type mangled name values.
//
// Size of the constexpr-generated mangled name.
// If this value is too small, the compiler will produce errors.
static constexpr size_t kStaticMangledNameLength = TBasicMangledName::mangledNameSize + 1;
// Type which holds the mangled names for constexpr-generated TTypes.
// This simple struct is needed so that a char array can be returned by value.
struct StaticMangledName
{
// If this array is too small, the compiler will produce errors.
char name[kStaticMangledNameLength + 1] = {};
};
// Generates a mangled name for a TType given its parameters.
constexpr StaticMangledName BuildStaticMangledName(TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize)
{
StaticMangledName name = {};
name.name[0] = TType::GetSizeMangledName(primarySize, secondarySize);
TBasicMangledName typeName(basicType);
char *mangledName = typeName.getName();
static_assert(TBasicMangledName::mangledNameSize == 2, "Mangled name size is not 2");
name.name[1] = mangledName[0];
name.name[2] = mangledName[1];
name.name[3] = '\0';
return name;
}
// Similar mangled name builder but for array types. Currently, only single-dimension arrays of
// single-digit size are necessary and supported.
static constexpr size_t kStaticArrayMangledNameLength = kStaticMangledNameLength + 2;
struct StaticArrayMangledName
{
char name[kStaticArrayMangledNameLength + 1] = {};
};
constexpr StaticArrayMangledName BuildStaticArrayMangledName(TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize,
const unsigned int *arraySizes,
size_t numArraySizes)
{
StaticMangledName nonArrayName =
BuildStaticMangledName(basicType, precision, qualifier, primarySize, secondarySize);
StaticArrayMangledName arrayName = {};
static_assert(kStaticMangledNameLength == 3, "Static mangled name size is not 3");
arrayName.name[0] = nonArrayName.name[0];
arrayName.name[1] = nonArrayName.name[1];
arrayName.name[2] = nonArrayName.name[2];
arrayName.name[3] = 'x';
arrayName.name[4] = static_cast<char>('0' + arraySizes[0]);
arrayName.name[5] = '\0';
return arrayName;
}
// This "variable" contains the mangled names for every constexpr-generated TType.
// If kMangledNameInstance<B, P, Q, PS, SS> is used anywhere (specifally
// in instance, below), this is where the appropriate type will be stored.
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize>
static constexpr StaticMangledName kMangledNameInstance =
BuildStaticMangledName(basicType, precision, qualifier, primarySize, secondarySize);
// Same as kMangledNameInstance, but for array types.
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize,
const unsigned int *arraySizes,
size_t numArraySizes>
static constexpr StaticArrayMangledName kMangledNameArrayInstance =
BuildStaticArrayMangledName(basicType,
precision,
qualifier,
primarySize,
secondarySize,
arraySizes,
numArraySizes);
//
// Generation and static allocation of TType values.
//
// This "variable" contains every constexpr-generated TType.
// If instance<B, P, Q, PS, SS> is used anywhere (specifally
// in Get, below), this is where the appropriate type will be stored.
//
// TODO(crbug.com/981610): This is constexpr but doesn't follow the kConstant naming convention
// because TType has a mutable member that prevents it from being in .data.rel.ro and makes the
// Android Binary Size builder complain when ANGLE is rolled in Chromium.
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize>
static constexpr TType instance =
TType(basicType,
precision,
qualifier,
primarySize,
secondarySize,
TSpan<const unsigned int>(),
kMangledNameInstance<basicType, precision, qualifier, primarySize, secondarySize>.name);
// Same as instance, but for array types.
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize,
const unsigned int *arraySizes,
size_t numArraySizes>
static constexpr TType arrayInstance =
TType(basicType,
precision,
qualifier,
primarySize,
secondarySize,
TSpan<const unsigned int>(arraySizes, numArraySizes),
kMangledNameArrayInstance<basicType, precision, qualifier, primarySize, secondarySize, arraySizes, numArraySizes>.name);
} // namespace Helpers
//
// Fully-qualified type lookup.
//
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize>
constexpr const TType *Get()
{
static_assert(1 <= primarySize && primarySize <= 4, "primarySize out of bounds");
static_assert(1 <= secondarySize && secondarySize <= 4, "secondarySize out of bounds");
return &Helpers::instance<basicType, precision, qualifier, primarySize, secondarySize>;
}
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize,
uint8_t secondarySize,
const unsigned int *arraySizes,
size_t numArraySizes>
constexpr const TType *GetArray()
{
static_assert(1 <= primarySize && primarySize <= 4, "primarySize out of bounds");
static_assert(1 <= secondarySize && secondarySize <= 4, "secondarySize out of bounds");
static_assert(numArraySizes == 1, "only single-dimension static types are supported");
static_assert(arraySizes[0] < 10, "only single-digit dimensions are supported in static types");
return &Helpers::arrayInstance<basicType, precision, qualifier, primarySize, secondarySize,
arraySizes, numArraySizes>;
}
//
// Overloads
//
template <TBasicType basicType,
TPrecision precision,
uint8_t primarySize = 1,
uint8_t secondarySize = 1>
constexpr const TType *GetBasic()
{
return Get<basicType, precision, EvqGlobal, primarySize, secondarySize>();
}
template <TBasicType basicType,
TPrecision precision,
uint8_t primarySize = 1,
uint8_t secondarySize = 1>
constexpr const TType *GetTemporary()
{
return Get<basicType, precision, EvqTemporary, primarySize, secondarySize>();
}
template <TBasicType basicType,
TPrecision precision,
TQualifier qualifier,
uint8_t primarySize = 1,
uint8_t secondarySize = 1>
const TType *GetQualified()
{
return Get<basicType, precision, qualifier, primarySize, secondarySize>();
}
// Dynamic lookup methods (convert runtime values to template args)
namespace Helpers
{
// Helper which takes secondarySize statically but primarySize dynamically.
template <TBasicType basicType, TPrecision precision, TQualifier qualifier, uint8_t secondarySize>
constexpr const TType *GetForVecMatHelper(uint8_t primarySize)
{
static_assert(basicType == EbtFloat || basicType == EbtInt || basicType == EbtUInt ||
basicType == EbtBool,
"unsupported basicType");
switch (primarySize)
{
case 1:
return Get<basicType, precision, qualifier, 1, secondarySize>();
case 2:
return Get<basicType, precision, qualifier, 2, secondarySize>();
case 3:
return Get<basicType, precision, qualifier, 3, secondarySize>();
case 4:
return Get<basicType, precision, qualifier, 4, secondarySize>();
default:
UNREACHABLE();
return GetBasic<EbtVoid, EbpUndefined>();
}
}
} // namespace Helpers
template <TBasicType basicType, TPrecision precision, TQualifier qualifier = EvqGlobal>
constexpr const TType *GetForVecMat(uint8_t primarySize, uint8_t secondarySize = 1)
{
static_assert(basicType == EbtFloat || basicType == EbtInt || basicType == EbtUInt ||
basicType == EbtBool,
"unsupported basicType");
switch (secondarySize)
{
case 1:
return Helpers::GetForVecMatHelper<basicType, precision, qualifier, 1>(primarySize);
case 2:
return Helpers::GetForVecMatHelper<basicType, precision, qualifier, 2>(primarySize);
case 3:
return Helpers::GetForVecMatHelper<basicType, precision, qualifier, 3>(primarySize);
case 4:
return Helpers::GetForVecMatHelper<basicType, precision, qualifier, 4>(primarySize);
default:
UNREACHABLE();
return GetBasic<EbtVoid, EbpUndefined>();
}
}
template <TBasicType basicType, TPrecision precision>
constexpr const TType *GetForVec(TQualifier qualifier, uint8_t size)
{
switch (qualifier)
{
case EvqGlobal:
return Helpers::GetForVecMatHelper<basicType, precision, EvqGlobal, 1>(size);
case EvqParamOut:
return Helpers::GetForVecMatHelper<basicType, precision, EvqParamOut, 1>(size);
default:
UNREACHABLE();
return GetBasic<EbtVoid, EbpUndefined>();
}
}
} // namespace StaticType
} // namespace sh
#endif // COMPILER_TRANSLATOR_STATIC_TYPE_H_
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