spec.cpp

#include "constants.h"
#include "dpdkArch.h"
#include "dpdkAsmOpt.h"
#include "dpdkHelpers.h"
#include "ir/annotations.h"
#include "ir/dbprint.h"
#include "printUtils.h"

namespace P4 {

using namespace P4::DBPrint;

ordered_map<cstring, int> DPDK::CollectDirectCounterMeter::directMeterCounterSizeMap = {};
auto &directMeterCounterSizeMap = DPDK::CollectDirectCounterMeter::directMeterCounterSizeMap;

ordered_map<cstring, cstring> DPDK::ShortenTokenLength::origNameMap = {};
auto &origNameMap = DPDK::ShortenTokenLength::origNameMap;

void add_space(std::ostream &out, int size) { out << std::setfill(' ') << std::setw(size) << " "; }

void add_comment(std::ostream &out, cstring str, std::string_view sep = "") {
    if (origNameMap.count(str)) {
        out << sep << ";oldname:" << origNameMap.at(str) << "\n";
    }
}

std::ostream &IR::DpdkAsmProgram::toSpec(std::ostream &out) const {
    for (auto l : globals) {
        l->toSpec(out) << std::endl;
    }
    out << std::endl;
    for (auto h : headerType) {
        add_comment(out, h->name.toString());
        h->toSpec(out) << std::endl;
    }
    for (auto s : structType) {
        add_comment(out, s->name.toString());
        s->toSpec(out) << std::endl;
    }
    for (auto hi : headerInstance) {
        add_comment(out, hi->name->toString());
        hi->toSpec(out) << std::endl;
    }
    for (auto s : externDeclarations) {
        add_comment(out, s->name.toString());
        s->toSpec(out);
    }
    for (auto a : actions) {
        add_comment(out, a->name.toString());
        a->toSpec(out) << std::endl << std::endl;
    }
    for (auto t : tables) {
        add_comment(out, t->name);
        t->toSpec(out) << std::endl << std::endl;
    }
    for (auto s : selectors) {
        add_comment(out, s->name);
        s->toSpec(out) << std::endl;
    }
    for (auto s : learners) {
        add_comment(out, s->name);
        s->toSpec(out) << std::endl;
    }
    for (auto s : statements) {
        s->toSpec(out) << std::endl;
    }
    return out;
}

std::ostream &IR::DpdkAsmStatement::toSpec(std::ostream &out) const {
    BUG("asm statement %1% not implemented", this);
    return out;
}

std::ostream &IR::DpdkDeclaration::toSpec(std::ostream &out) const {
    // TBD
    return out;
}

std::ostream &IR::DpdkExternDeclaration::toSpec(std::ostream &out) const {
    if (DPDK::toStr(getType()) == "Hash") {
        auto args = arguments;
        if (args->size() == 0) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Hash extern declaration %1% must contain hash algorithm \n", Name());
        } else {
            auto hashAlg = args->at(0)->expression;
            unsigned hashAlgValue = CRC1;
            if (hashAlg->is<IR::Constant>())
                hashAlgValue = hashAlg->to<IR::Constant>()->asUnsigned();
            if (hashAlgValue == TOEPLITZ) {
                auto hashDecl = new IR::DpdkHashDeclStatement(Name());
                hashDecl->toSpec(out) << std::endl;
            }
        }

    } else if (DPDK::toStr(getType()) == "Register") {
        auto args = arguments;
        if (args->size() == 0) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Register extern declaration %1% must contain a size parameter\n", Name());
        } else {
            auto size = args->at(0)->expression;
            auto init_val = args->size() == 2 ? args->at(1)->expression : nullptr;
            auto regDecl = new IR::DpdkRegisterDeclStatement(Name(), size, init_val);
            regDecl->toSpec(out) << std::endl;
        }
    } else if (DPDK::toStr(getType()) == "Counter") {
        auto args = arguments;
        unsigned value = 0;
        if (args->size() < 2) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Counter extern declaration %1% must contain 2 parameters\n", Name());
        } else {
            auto n_counters = args->at(0)->expression;
            auto counter_type = args->at(1)->expression;
            if (counter_type->is<IR::Constant>())
                value = counter_type->to<IR::Constant>()->asUnsigned();
            if (value == 2) {
                // For PACKETS_AND_BYTES counter type, two regarray declarations are emitted and
                // the counter name is suffixed with _packets and _bytes.
                auto regDecl = new IR::DpdkRegisterDeclStatement(Name() + "_packets", n_counters,
                                                                 new IR::Constant(0));
                regDecl->toSpec(out) << std::endl << std::endl;
                regDecl = new IR::DpdkRegisterDeclStatement(Name() + "_bytes", n_counters,
                                                            new IR::Constant(0));
                regDecl->toSpec(out) << std::endl;
            } else {
                auto regDecl =
                    new IR::DpdkRegisterDeclStatement(Name(), n_counters, new IR::Constant(0));
                regDecl->toSpec(out) << std::endl;
            }
        }
    } else if (DPDK::toStr(getType()) == "DirectCounter") {
        auto args = arguments;
        unsigned value = 0;
        if (args->size() != 1) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Counter extern declaration %1% must contain 1 parameters\n", Name());
        } else {
            IR::Expression *n_counters = nullptr;
            if (directMeterCounterSizeMap.count(Name())) {
                n_counters = new IR::Constant(directMeterCounterSizeMap.at(Name()));
            } else {
                BUG("%1%: Direct Counter size is not populated", Name());
            }

            auto counter_type = args->at(0)->expression;
            if (counter_type->is<IR::Constant>())
                value = counter_type->to<IR::Constant>()->asUnsigned();
            if (value == 2) {
                // For PACKETS_AND_BYTES counter type, two regarray declarations are emitted and
                // the counter name is suffixed with _packets and _bytes
                auto regDecl = new IR::DpdkRegisterDeclStatement(Name() + "_packets", n_counters,
                                                                 new IR::Constant(0));
                regDecl->toSpec(out) << std::endl << std::endl;
                regDecl = new IR::DpdkRegisterDeclStatement(Name() + "_bytes", n_counters,
                                                            new IR::Constant(0));
                regDecl->toSpec(out) << std::endl;
            } else {
                auto regDecl =
                    new IR::DpdkRegisterDeclStatement(Name(), n_counters, new IR::Constant(0));
                regDecl->toSpec(out) << std::endl;
            }
        }
    } else if (DPDK::toStr(getType()) == "Meter") {
        auto args = arguments;
        if (args->size() < 2) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Meter extern declaration %1% must contain a size parameter"
                        " and meter type parameter",
                        Name());
        } else {
            auto n_meters = args->at(0)->expression;
            auto metDecl = new IR::DpdkMeterDeclStatement(Name(), n_meters);
            metDecl->toSpec(out) << std::endl;
        }
    } else if (DPDK::toStr(getType()) == "DirectMeter") {
        auto args = arguments;
        if (args->size() < 1) {
            ::P4::error(ErrorType::ERR_INVALID,
                        "Meter extern declaration %1% must have "
                        "meter type parameter",
                        Name());
        } else {
            IR::Expression *n_meters = nullptr;
            if (directMeterCounterSizeMap.count(Name())) {
                n_meters = new IR::Constant(directMeterCounterSizeMap.at(Name()));
            } else {
                BUG("%1%, Direct Meter size is not populated", Name());
            }
            auto metDecl = new IR::DpdkMeterDeclStatement(Name(), n_meters);
            metDecl->toSpec(out) << std::endl;
        }
    }
    return out;
}

std::ostream &IR::DpdkHeaderType::toSpec(std::ostream &out) const {
    out << "struct " << name << " {" << std::endl;
    for (auto it = fields.begin(); it != fields.end(); ++it) {
        add_comment(out, (*it)->name.toString(), "\t");
        if (auto t = (*it)->type->to<IR::Type_Bits>())
            out << "\tbit<" << t->width_bits() << ">";
        else if (auto t = (*it)->type->to<IR::Type_Name>())
            out << "\t" << t->path->name;
        else if ((*it)->type->to<IR::Type_Boolean>())
            out << "\tbool";
        else if (auto t = (*it)->type->to<IR::Type_Varbits>())
            out << "\tvarbit<" << t->size << ">";
        else {
            BUG("Unsupported type: %1% ", *it);
        }
        out << " " << (*it)->externalName();
        out << std::endl;
    }
    out << "}" << std::endl;
    return out;
}

std::ostream &IR::DpdkHeaderInstance::toSpec(std::ostream &out) const {
    out << "header " << name->toString() << " instanceof " << headerType->name.name;
    return out;
}

std::ostream &IR::DpdkStructType::toSpec(std::ostream &out) const {
    if (getAnnotation("__packet_data__"_cs)) {
        for (auto it = fields.begin(); it != fields.end(); ++it) {
            add_comment(out, (*it)->name.toString());
            if (auto t = (*it)->type->to<IR::Type_Name>()) {
                out << "header " << (*it)->name << " instanceof " << t->path->name;
            } else if (auto t = (*it)->type->to<IR::Type_Stack>()) {
                if (!t->elementType->is<IR::Type_Name>())
                    BUG("%1% Unsupported type", t->elementType);
                cstring type_name = t->elementType->to<IR::Type_Name>()->path->name;
                if (!t->size->is<IR::Constant>()) {
                    BUG("Header stack index in %1% must be compile-time constant", t);
                }
                for (auto i = 0; i < t->size->to<IR::Constant>()->value; i++) {
                    out << "header " << (*it)->name << "_" << i << " instanceof " << type_name
                        << std::endl;
                }
            } else {
                BUG("Unsupported type %1%", *it);
            }
            out << std::endl;
        }
    } else {
        out << "struct " << name << " {" << std::endl;
        for (auto it = fields.begin(); it != fields.end(); ++it) {
            add_comment(out, (*it)->name.toString(), "\t");
            if (auto t = (*it)->type->to<IR::Type_Bits>())
                out << "\tbit<" << t->width_bits() << ">";
            else if (auto t = (*it)->type->to<IR::Type_Name>()) {
                if (t->path->name == "error") {
                    out << "\tbit<8>";
                } else {
                    out << "\t" << t->path;
                }
            } else if ((*it)->type->to<IR::Type_Error>()) {
                // DPDK implements error type as bit<8>
                out << "\tbit<8>";
            } else if ((*it)->type->to<IR::Type_Boolean>()) {
                // DPDK implements bool as bit<8>
                out << "\tbit<8>";
            } else {
                std::cout << (*it)->type->node_type_name() << std::endl;
                BUG("Unsupported type");
            }
            out << " " << (*it)->externalName();
            out << std::endl;
        }
        out << "}" << std::endl;
        if (getAnnotation("__metadata__"_cs)) {
            out << "metadata instanceof " << name << std::endl;
        }
    }
    return out;
}

std::ostream &IR::DpdkListStatement::toSpec(std::ostream &out) const {
    out << "apply {" << std::endl;
    for (auto s : statements) {
        out << "\t";
        s->toSpec(out);
        if (!s->to<IR::DpdkLabelStatement>()) out << std::endl;
    }
    out << "}" << std::endl;
    return out;
}

std::ostream &IR::DpdkApplyStatement::toSpec(std::ostream &out) const {
    out << "table " << table;
    return out;
}

std::ostream &IR::DpdkMirrorStatement::toSpec(std::ostream &out) const {
    out << "mirror " << DPDK::toStr(slotId) << " " << DPDK::toStr(sessionId);
    return out;
}

std::ostream &IR::DpdkLearnStatement::toSpec(std::ostream &out) const {
    out << "learn " << action << " ";
    if (argument) out << DPDK::toStr(argument) << " ";
    out << DPDK::toStr(timeout);
    return out;
}

std::ostream &IR::DpdkEmitStatement::toSpec(std::ostream &out) const {
    out << "emit " << DPDK::toStr(header);
    return out;
}

std::ostream &IR::DpdkExtractStatement::toSpec(std::ostream &out) const {
    out << "extract " << DPDK::toStr(header);
    if (length) out << " " << DPDK::toStr(length);
    return out;
}

std::ostream &IR::DpdkLookaheadStatement::toSpec(std::ostream &out) const {
    out << "lookahead " << DPDK::toStr(header);
    return out;
}

std::ostream &IR::DpdkJmpStatement::toSpec(std::ostream &out) const {
    out << instruction << " " << label;
    return out;
}

std::ostream &IR::DpdkJmpHeaderStatement::toSpec(std::ostream &out) const {
    out << instruction << " " << label << " " << DPDK::toStr(header);
    return out;
}

std::ostream &IR::DpdkJmpActionStatement::toSpec(std::ostream &out) const {
    out << instruction << " " << label << " " << action;
    return out;
}

std::ostream &IR::DpdkJmpCondStatement::toSpec(std::ostream &out) const {
    out << instruction << " " << label << " " << DPDK::toStr(src1) << " " << DPDK::toStr(src2);
    return out;
}

std::ostream &IR::DpdkBinaryStatement::toSpec(std::ostream &out) const {
    BUG_CHECK(dst->equiv(*src1),
              "The first source field %1% in a binary operation"
              "must be the same as the destination field %2% to be supported by DPDK",
              src1, dst);
    out << instruction << " " << DPDK::toStr(dst) << " " << DPDK::toStr(src2);
    return out;
}

std::ostream &IR::DpdkUnaryStatement::toSpec(std::ostream &out) const {
    out << instruction << " " << DPDK::toStr(dst) << " " << DPDK::toStr(src);
    return out;
}

std::ostream &IR::DpdkRxStatement::toSpec(std::ostream &out) const {
    out << "rx " << DPDK::toStr(port);
    return out;
}

std::ostream &IR::DpdkTxStatement::toSpec(std::ostream &out) const {
    out << "tx " << DPDK::toStr(port);
    return out;
}

std::ostream &IR::DpdkReturnStatement::toSpec(std::ostream &out) const {
    out << "return ";
    return out;
}

std::ostream &IR::DpdkRearmStatement::toSpec(std::ostream &out) const {
    out << "rearm";
    if (timeout) out << " " << DPDK::toStr(timeout);
    return out;
}

std::ostream &IR::DpdkRecirculateStatement::toSpec(std::ostream &out) const {
    out << "recirculate";
    return out;
}

std::ostream &IR::DpdkRecircidStatement::toSpec(std::ostream &out) const {
    out << "recircid " << DPDK::toStr(pass);
    return out;
}

std::ostream &IR::DpdkLabelStatement::toSpec(std::ostream &out) const {
    out << label << " :";
    return out;
}

std::ostream &IR::DpdkTable::toSpec(std::ostream &out) const {
    out << "table " << name << " {" << std::endl;
    if (match_keys) {
        out << "\tkey {" << std::endl;
        for (auto key : match_keys->keyElements) {
            out << "\t\t" << DPDK::toStr(key->expression) << " ";
            if ((key->matchType)->toString() == "ternary" ||
                (key->matchType)->toString() == "optional" ||
                (key->matchType)->toString() == "range") {
                out << "wildcard" << std::endl;
            } else {
                out << DPDK::toStr(key->matchType) << std::endl;
            }
        }
        out << "\t}" << std::endl;
    }
    out << "\tactions {" << std::endl;
    for (auto action : actions->actionList) {
        if (action->expression->toString() == "NoAction") {
            out << "\t\tNoAction";
        } else {
            out << "\t\t" << DPDK::toStr(action->expression);
        }
        if (action->hasAnnotation(IR::Annotation::tableOnlyAnnotation)) out << " @tableonly";
        if (action->hasAnnotation(IR::Annotation::defaultOnlyAnnotation)) out << " @defaultonly";
        out << std::endl;
    }
    out << "\t}" << std::endl;

    if (default_action->toString() == "NoAction")
        out << "\tdefault_action NoAction";
    else
        out << "\tdefault_action " << DPDK::toStr(default_action);
    if (default_action->to<IR::MethodCallExpression>()->arguments->size() == 0) {
        out << " args none ";
    } else {
        out << " args ";
        auto mce = default_action->to<IR::MethodCallExpression>();
        auto earg = mce->arguments->at(0)->expression;
        if (earg->is<IR::ListExpression>()) {
            auto paramCount = earg->to<IR::ListExpression>()->components.size();
            for (unsigned i = 0; i < paramCount; i++) {
                if (earg->to<IR::ListExpression>()->components.at(i)->is<IR::Constant>()) {
                    auto val = earg->to<IR::ListExpression>()
                                   ->components.at(i)
                                   ->to<IR::Constant>()
                                   ->asUnsigned();
                    out << default_action_paraList.parameters.at(i)->toString() << " ";
                    out << "0x" << std::hex << std::uppercase << val << " ";
                } else if (earg->to<IR::ListExpression>()
                               ->components.at(i)
                               ->is<IR::BoolLiteral>()) {
                    earg->dbprint(std::cout);
                    auto val = earg->to<IR::ListExpression>()
                                   ->components.at(i)
                                   ->to<IR::BoolLiteral>()
                                   ->value;
                    out << default_action_paraList.parameters.at(i)->toString() << " ";
                    out << "0x" << std::hex << std::uppercase << val << " ";
                } else {
                    BUG("Unsupported parameter type in default action in DPDK Target");
                }
            }
        }
    }
    auto def = properties->getProperty("default_action");
    if (def->isConstant) out << "const";
    out << std::endl;
    if (auto psa_implementation = properties->getProperty("psa_implementation")) {
        out << "\taction_selector " << DPDK::toStr(psa_implementation->value) << std::endl;
    }
    if (auto size = properties->getProperty("size")) {
        out << "\tsize " << DPDK::toStr(size->value) << "" << std::endl;
    } else {
        out << "\tsize 0x10000" << std::endl;
    }
    out << "}" << std::endl;
    return out;
}

std::ostream &IR::DpdkSelector::toSpec(std::ostream &out) const {
    out << "selector " << name << " {" << std::endl;
    out << "\tgroup_id " << DPDK::toStr(group_id) << std::endl;
    if (selectors) {
        out << "\tselector {" << std::endl;
        for (auto key : selectors->keyElements) {
            out << "\t\t" << DPDK::toStr(key->expression) << std::endl;
        }
        out << "\t}" << std::endl;
    }
    out << "\tmember_id " << DPDK::toStr(member_id) << std::endl;
    out << "\tn_groups_max 0x" << std::hex << std::uppercase << n_groups_max << std::endl;
    out << "\tn_members_per_group_max 0x" << std::hex << std::uppercase << n_members_per_group_max
        << std::endl;
    out << "}" << std::endl;
    return out;
}

std::ostream &IR::DpdkLearner::toSpec(std::ostream &out) const {
    out << "learner " << name << " {" << std::endl;
    if (match_keys) {
        out << "\tkey {" << std::endl;
        for (auto key : match_keys->keyElements) {
            out << "\t\t" << DPDK::toStr(key->expression) << std::endl;
        }
    }
    out << "\t}" << std::endl;
    out << "\tactions {" << std::endl;
    for (auto action : actions->actionList) {
        out << "\t\t" << DPDK::toStr(action->expression);
        if (action->getAnnotation("tableonly"_cs)) out << " @tableonly";
        if (action->getAnnotation("defaultonly"_cs)) out << " @defaultonly";
        out << std::endl;
    }
    out << "\t}" << std::endl;

    out << "\tdefault_action " << DPDK::toStr(default_action);
    if (default_action->to<IR::MethodCallExpression>()->arguments->size() == 0) {
        out << " args none ";
    } else {
        BUG("non-zero default action arguments not supported yet");
    }
    out << std::endl;
    if (auto size = properties->getProperty("size")) {
        out << "\tsize " << DPDK::toStr(size->value) << "" << std::endl;
    } else {
        out << "\tsize 0x" << std::hex << std::uppercase << default_learner_table_size << std::endl;
    }

    // The initial timeout values
    // This initializes 8 timeout values which can later be configured through control plane APIs.
    out << "\ttimeout {" << std::endl;
    for (unsigned int i = 0; i < dpdk_learner_max_configurable_timeout_values; i++)
        out << "\t\t" << std::dec << default_learner_table_timeout[i] << std::endl;
    out << "\n\t\t}";
    out << "\n}" << std::endl;
    return out;
}

std::ostream &IR::DpdkAction::toSpec(std::ostream &out) const {
    out << "action " << name.toString() << " args ";

    if (para.parameters.size() == 0) out << "none ";

    for (auto p : para.parameters) {
        out << "instanceof " << p->type << " ";
        if (p != para.parameters.back()) out << " ";
    }
    out << "{" << std::endl;
    for (auto i : statements) {
        out << "\t";
        i->toSpec(out);
        if (!i->to<IR::DpdkLabelStatement>()) out << std::endl;
    }
    out << "\treturn" << std::endl;
    out << "}";

    return out;
}

std::ostream &IR::DpdkChecksumAddStatement::toSpec(std::ostream &out) const {
    out << "ckadd " << "h.cksum_state." << intermediate_value << " " << DPDK::toStr(field);
    return out;
}

std::ostream &IR::DpdkChecksumSubStatement::toSpec(std::ostream &out) const {
    out << "cksub " << "h.cksum_state." << intermediate_value << " " << DPDK::toStr(field);
    return out;
}

std::ostream &IR::DpdkChecksumClearStatement::toSpec(std::ostream &out) const {
    out << "mov " << "h.cksum_state." << intermediate_value << " " << "0x0";
    return out;
}

std::ostream &IR::DpdkHashDeclStatement::toSpec(std::ostream &out) const {
    add_comment(out, hash);
    out << "rss " << hash;
    return out;
}

std::ostream &IR::DpdkGetHashStatement::toSpec(std::ostream &out) const {
    out << instr << " " << hash << " " << DPDK::toStr(dst) << " ";
    if (auto l = fields->to<IR::ListExpression>()) {
        if (l->components.size() == 1) {
            out << " " << DPDK::toStr(l->components.at(0));
            out << " " << DPDK::toStr(l->components.at(0));
        } else {
            out << " " << DPDK::toStr(l->components.at(0));
            out << " " << DPDK::toStr(l->components.at(l->components.size() - 1));
        }
    } else {
        ::P4::error(ErrorType::ERR_INVALID, "%1%: get_hash's arg is not a ListExpression.", this);
    }
    return out;
}

std::ostream &IR::DpdkGetChecksumStatement::toSpec(std::ostream &out) const {
    out << "mov " << DPDK::toStr(dst) << " " << "h.cksum_state." << intermediate_value;
    return out;
}

std::ostream &IR::DpdkCastStatement::toSpec(std::ostream &out) const {
    out << "mov " << DPDK::toStr(dst) << " " << DPDK::toStr(src);
    return out;
}

std::ostream &IR::DpdkVerifyStatement::toSpec(std::ostream &out) const {
    out << "verify " << DPDK::toStr(condition) << " " << DPDK::toStr(error);
    return out;
}

std::ostream &IR::DpdkMeterDeclStatement::toSpec(std::ostream &out) const {
    add_comment(out, meter);
    out << "metarray " << meter << " size " << DPDK::toStr(size);
    return out;
}

std::ostream &IR::DpdkMeterExecuteStatement::toSpec(std::ostream &out) const {
    out << "meter " << meter << " " << DPDK::toStr(index) << " " << DPDK::toStr(length);
    out << " " << DPDK::toStr(color_in) << " " << DPDK::toStr(color_out);
    return out;
}

/// DPDK target uses Registers for implementing using Counters, atomic register add instruction
/// is used for incrementing the counter. Packet counters are incremented by packet length
/// specified as parameter and byte counters are incremente by 1.
std::ostream &IR::DpdkCounterCountStatement::toSpec(std::ostream &out) const {
    add_comment(out, counter);
    out << "regadd " << counter << " " << DPDK::toStr(index) << " ";
    if (incr)
        out << DPDK::toStr(incr);
    else
        out << "1";
    return out;
}

std::ostream &IR::DpdkGetTableEntryIndex::toSpec(std::ostream &out) const {
    out << "entryid " << DPDK::toStr(index) << " ";
    return out;
}

std::ostream &IR::DpdkRegisterDeclStatement::toSpec(std::ostream &out) const {
    add_comment(out, reg);
    out << "regarray " << reg << " size " << DPDK::toStr(size) << " initval ";
    if (init_val)
        out << DPDK::toStr(init_val);
    else
        out << "0";
    return out;
}

std::ostream &IR::DpdkRegisterReadStatement::toSpec(std::ostream &out) const {
    out << "regrd " << DPDK::toStr(dst) << " " << reg << " " << DPDK::toStr(index);
    return out;
}

std::ostream &IR::DpdkRegisterWriteStatement::toSpec(std::ostream &out) const {
    out << "regwr " << reg << " " << DPDK::toStr(index) << " " << DPDK::toStr(src);
    return out;
}

std::ostream &IR::DpdkValidateStatement::toSpec(std::ostream &out) const {
    out << "validate " << DPDK::toStr(header);
    return out;
}

std::ostream &IR::DpdkInvalidateStatement::toSpec(std::ostream &out) const {
    out << "invalidate " << DPDK::toStr(header);
    return out;
}

std::ostream &IR::DpdkDropStatement::toSpec(std::ostream &out) const {
    out << "drop";
    return out;
}

}  // namespace P4