argument_decoder_gadget.hpp

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#ifndef ARGUMENT_DECODER_GADGET_HPP_
#define ARGUMENT_DECODER_GADGET_HPP_
 
#include <libsnark/gadgetlib1/gadgets/cpu_checkers/tinyram/components/tinyram_protoboard.hpp>
 
namespace libsnark
{
 
template<typename FieldT>
class argument_decoder_gadget : public tinyram_standard_gadget<FieldT>
{
private:
    pb_variable<FieldT> packed_desidx;
    pb_variable<FieldT> packed_arg1idx;
    pb_variable<FieldT> packed_arg2idx;
 
    std::shared_ptr<packing_gadget<FieldT>> pack_desidx;
    std::shared_ptr<packing_gadget<FieldT>> pack_arg1idx;
    std::shared_ptr<packing_gadget<FieldT>> pack_arg2idx;
 
    pb_variable<FieldT> arg2_demux_result;
    pb_variable<FieldT> arg2_demux_success;
 
    std::shared_ptr<loose_multiplexing_gadget<FieldT>> demux_des;
    std::shared_ptr<loose_multiplexing_gadget<FieldT>> demux_arg1;
    std::shared_ptr<loose_multiplexing_gadget<FieldT>> demux_arg2;
 
public:
    pb_variable<FieldT> arg2_is_imm;
    pb_variable_array<FieldT> desidx;
    pb_variable_array<FieldT> arg1idx;
    pb_variable_array<FieldT> arg2idx;
    pb_variable_array<FieldT> packed_registers;
    pb_variable<FieldT> packed_desval;
    pb_variable<FieldT> packed_arg1val;
    pb_variable<FieldT> packed_arg2val;
 
    argument_decoder_gadget(
        tinyram_protoboard<FieldT> &pb,
        const pb_variable<FieldT> &arg2_is_imm,
        const pb_variable_array<FieldT> &desidx,
        const pb_variable_array<FieldT> &arg1idx,
        const pb_variable_array<FieldT> &arg2idx,
        const pb_variable_array<FieldT> &packed_registers,
        const pb_variable<FieldT> &packed_desval,
        const pb_variable<FieldT> &packed_arg1val,
        const pb_variable<FieldT> &packed_arg2val,
        const std::string &annotation_prefix = "");
 
    void generate_r1cs_constraints();
    void generate_r1cs_witness();
};
 
template<typename FieldT> void test_argument_decoder_gadget();
 
} // namespace libsnark
 
#include <libsnark/gadgetlib1/gadgets/cpu_checkers/tinyram/components/argument_decoder_gadget.tcc>
 
#endif // ARGUMENT_DECODER_GADGET_HPP_