Represents a family of uniform, quantized types. More...
#include "mlir/Dialect/Quant/IR/QuantTypes.h"
Public Member Functions | |
| double | getScale () const |
| Gets the scale term. | |
| int64_t | getZeroPoint () const |
| Gets the storage value corresponding to the real value 0 in the affine equation. | |
| bool | isFixedPoint () const |
| Public Member Functions inherited from mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... > | |
| ImplType * | getImpl () const |
| Utility for easy access to the storage instance. | |
Static Public Member Functions | |
| static UniformQuantizedType | get (unsigned flags, Type storageType, Type expressedType, double scale, int64_t zeroPoint, int64_t storageTypeMin, int64_t storageTypeMax) |
| Gets an instance of the type with all parameters specified but not checked. | |
| static UniformQuantizedType | getChecked (function_ref< InFlightDiagnostic()> emitError, unsigned flags, Type storageType, Type expressedType, double scale, int64_t zeroPoint, int64_t storageTypeMin, int64_t storageTypeMax) |
| Gets an instance of the type with all specified parameters checked. | |
| static LogicalResult | verifyInvariants (function_ref< InFlightDiagnostic()> emitError, unsigned flags, Type storageType, Type expressedType, double scale, int64_t zeroPoint, int64_t storageTypeMin, int64_t storageTypeMax) |
| Verifies construction invariants and issues errors/warnings. | |
| Static Public Member Functions inherited from mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... > | |
| static TypeID | getTypeID () |
| Return a unique identifier for the concrete type. | |
| static bool | classof (T val) |
| Provide an implementation of 'classof' that compares the type id of the provided value with that of the concrete type. | |
| static detail::InterfaceMap | getInterfaceMap () |
| Returns an interface map for the interfaces registered to this storage user. | |
| static HasTraitFn | getHasTraitFn () |
| Returns the function that returns true if the given Trait ID matches the IDs of any of the traits defined by the storage user. | |
| static auto | getWalkImmediateSubElementsFn () |
| Returns a function that walks immediate sub elements of a given instance of the storage user. | |
| static auto | getReplaceImmediateSubElementsFn () |
| Returns a function that replaces immediate sub elements of a given instance of the storage user. | |
| static void | attachInterface (MLIRContext &context) |
| Attach the given models as implementations of the corresponding interfaces for the concrete storage user class. | |
| static ConcreteType | get (MLIRContext *ctx, Args &&...args) |
| Get or create a new ConcreteT instance within the ctx. | |
| static ConcreteType | getChecked (const Location &loc, Args &&...args) |
| Get or create a new ConcreteT instance within the ctx, defined at the given, potentially unknown, location. | |
| static ConcreteType | getChecked (function_ref< InFlightDiagnostic()> emitErrorFn, MLIRContext *ctx, Args... args) |
| Get or create a new ConcreteT instance within the ctx. | |
| static ConcreteType | getFromOpaquePointer (const void *ptr) |
| Get an instance of the concrete type from a void pointer. | |
Static Public Attributes | |
| static constexpr StringLiteral | name = "quant.uniform" |
Additional Inherited Members | |
| Public Types inherited from mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... > | |
| using | Base |
| Utility declarations for the concrete attribute class. | |
| using | ImplType |
| using | HasTraitFn |
| Protected Member Functions inherited from mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... > | |
| LogicalResult | mutate (Args &&...args) |
| Mutate the current storage instance. | |
| Static Protected Member Functions inherited from mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... > | |
| static LogicalResult | verifyInvariants (Args... args) |
| Default implementation that just returns success. | |
Detailed Description
Represents a family of uniform, quantized types.
Each instance of this type expresses a mapping between real values (most often expressed in floating point f32) and quantized values (either fixed point or affine).
The relationship is: real_value = scale * (quantized_value - zero_point)
It is used as part of high level graph transformations that have the goal of re-expressing parts of a computation in terms of this common form for more efficient execution at runtime. In addition, it is designed to be expressive enough to facilitate lowering to precise types and operations in target hardware.
As a high-level type, focused on intermediate passes, this type holds opinions consistent with high-level usage. If lowering math kernels below the high level arithmetic ops (i.e. to LLVM IR or hardware specific instruction sets), it is expected that the information expressed here will be used to drive low level codegen and target specific type selection, but this type will likely be erased in the process.
Syntax synopsis: Per-layer, all parameters expressed: !quant<uniform[StorageType:ExpressedType]{Scale:ZeroPoint}> Per-layer, optional parameters omitted: !quant<uniform[StorageType]{Scale}>
StorageType: 'i'|'u' NumBits ExpressedType: 'f16', 'f32', 'bf16', 'f64' Scale: A legal double value ZeroPoint: An integer value
Definition at line 262 of file QuantTypes.h.
Member Function Documentation
◆ get()
|
static |
Gets an instance of the type with all parameters specified but not checked.
Definition at line 280 of file QuantTypes.cpp.
References mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... >::get(), and mlir::Type::getContext().
Referenced by mlirUniformQuantizedTypeGet().
◆ getChecked()
|
static |
Gets an instance of the type with all specified parameters checked.
Returns a nullptr convertible type on failure.
Definition at line 289 of file QuantTypes.cpp.
References mlir::emitError(), mlir::detail::StorageUserBase< ConcreteType, BaseType, StorageType, detail::TypeUniquer, Traits... >::getChecked(), and mlir::Type::getContext().
Referenced by mlir::quant::fakeQuantAttrsToType().
◆ getScale()
| double UniformQuantizedType::getScale | ( | ) | const |
Gets the scale term.
The scale designates the difference between the real values corresponding to consecutive quantized values differing by 1.
Definition at line 329 of file QuantTypes.cpp.
Referenced by printUniformQuantizedType().
◆ getZeroPoint()
| int64_t UniformQuantizedType::getZeroPoint | ( | ) | const |
Gets the storage value corresponding to the real value 0 in the affine equation.
Definition at line 331 of file QuantTypes.cpp.
Referenced by isFixedPoint(), and printUniformQuantizedType().
◆ isFixedPoint()
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inline |
Definition at line 305 of file QuantTypes.h.
References getZeroPoint().
◆ verifyInvariants()
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static |
Verifies construction invariants and issues errors/warnings.
Definition at line 298 of file QuantTypes.cpp.
References mlir::emitError(), success(), and mlir::quant::QuantizedType::verifyInvariants().
Member Data Documentation
◆ name
|
staticconstexpr |
Definition at line 269 of file QuantTypes.h.
The documentation for this class was generated from the following files:
- include/mlir/Dialect/Quant/IR/QuantTypes.h
- lib/Dialect/Quant/IR/QuantTypes.cpp
Generated on for MLIR by
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