compute_lowered_deparser_ir.h

 
#ifndef BACKENDS_TOFINO_BF_P4C_PARDE_LOWERED_COMPUTE_LOWERED_DEPARSER_IR_H_
#define BACKENDS_TOFINO_BF_P4C_PARDE_LOWERED_COMPUTE_LOWERED_DEPARSER_IR_H_
 
#include "backends/tofino/bf-p4c/parde/allocate_parser_checksum.h"
#include "backends/tofino/bf-p4c/parde/clot/clot_info.h"
#include "backends/tofino/bf-p4c/parde/parde_visitor.h"
 
namespace Parde::Lowered {
 
struct ComputeLoweredDeparserIR : public DeparserInspector {
    ComputeLoweredDeparserIR(const PhvInfo &phv, const ClotInfo &clotInfo)
        : phv(phv),
          clotInfo(clotInfo),
          nextChecksumUnit(0),
          lastSharedUnit(0),
          nested_unit(0),
          normal_unit(4) {
        igLoweredDeparser = new IR::BFN::LoweredDeparser(INGRESS);
        egLoweredDeparser = new IR::BFN::LoweredDeparser(EGRESS);
    }
 
    IR::BFN::LoweredDeparser *igLoweredDeparser;
    IR::BFN::LoweredDeparser *egLoweredDeparser;
    // Contains checksum unit number for each checksum destination in each gress
    std::map<gress_t, std::map<const IR::BFN::EmitChecksum *, unsigned>> checksumInfo;
 
 private:
    IR::Vector<IR::BFN::FieldLVal> removeDeparserZeroFields(
        IR::Vector<IR::BFN::FieldLVal> checksumFields);
 
    std::pair<IR::BFN::PartialChecksumUnitConfig *, std::vector<IR::BFN::ChecksumClotInput *>>
    getPartialUnit(const IR::BFN::EmitChecksum *emitChecksum, gress_t gress);
 
    IR::BFN::FullChecksumUnitConfig *lowerChecksum(const IR::BFN::EmitChecksum *emitChecksum,
                                                   gress_t gress);
 
    unsigned int getChecksumUnit(bool nested);
 
    bool preorder(const IR::BFN::Deparser *deparser) override;
 
    const PhvInfo &phv;
    const ClotInfo &clotInfo;
    unsigned nextChecksumUnit;
    unsigned lastSharedUnit;
    unsigned nested_unit;
    unsigned normal_unit;
};
 
}  // namespace Parde::Lowered
 
#endif /* BACKENDS_TOFINO_BF_P4C_PARDE_LOWERED_COMPUTE_LOWERED_DEPARSER_IR_H_ */