class ngraph::pass::FakeQuantizeDecomposition¶

Overview¶

FakeQuantizeDecomposition transformation decomposes FakeQuantize layer. More…

#include <fq_decomposition.hpp>

class FakeQuantizeDecomposition: public ov::pass::MatcherPass
{
public:
    // methods

    OPENVINO_RTTI("FakeQuantizeDecomposition", "0");
};

Inherited Members¶

public:
    // typedefs

    typedef DiscreteTypeInfo type_info_t;

    // methods

    bool get_property(const PassPropertyMask& prop_mask) const;
    void set_name(const std::string& name);
    std::string get_name() const;
    void set_callback(const param_callback& callback);
    virtual void set_pass_config(const std::shared_ptr<PassConfig>& pass_config);
    std::shared_ptr<PassConfig> get_pass_config();
    bool m_transformation_callback(const std::shared_ptr<const Node>& node);
    bool transformation_callback(const std::shared_ptr<const Node>& node);
    virtual const type_info_t& get_type_info() const = 0;
    OPENVINO_RTTI("ov::pass::MatcherPass");
    MatcherPass& operator = (const MatcherPass&);
    bool apply(std::shared_ptr<ov::Node> node);

    template <typename T, class... Args>
    std::shared_ptr<T> register_new_node(Args&&... args);

    template <typename T>
    std::shared_ptr<T> register_new_node(const std::shared_ptr<T>& node);

    std::shared_ptr<ov::Node> register_new_node_(const std::shared_ptr<ov::Node>& node);
    const std::vector<std::shared_ptr<ov::Node>>& get_new_nodes();
    void clear_new_nodes();
    std::shared_ptr<pattern::Matcher> get_matcher();

Detailed Documentation¶

FakeQuantizeDecomposition transformation decomposes FakeQuantize layer.

Expression from specification: if x <= min(input_low, input_high): output = output_low elif x > max(input_low, input_high): output = output_high else: output = round((x - input_low) / (input_high - input_low) * (levels-1)) / (levels-1) * (output_high - output_low) + output_low

expand brackets into round: round(x * (levels-1) / (input_high - input_low) - input_low * (levels-1) / (input_high - input_low)) div on (levels-1) and mult on (output_high - output_low) => mult on (output_high - output_low) / (levels-1)

=> round(x * (levels-1) / (input_high - input_low) - input_low * (levels-1) / (input_high - input_low)) * (output_high - output_low) / (levels-1) + output_low

This transformation doesn’t support following cases:

At least one ‘range’ input is not Constant
At least one ‘input_low’ input value greater or equal than ‘input_high’ input value