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Merge 7b087d6 into c71d910
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jeanmon authored Sep 28, 2024
2 parents c71d910 + 7b087d6 commit 302fee9
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Showing 41 changed files with 503 additions and 363 deletions.
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@
#include "barretenberg/stdlib_circuit_builders/ultra_flavor.hpp"
#include "barretenberg/vm/avm/recursion/avm_recursive_flavor.hpp"
#include "barretenberg/vm/avm/recursion/avm_recursive_verifier.hpp"
#include "barretenberg/vm/avm/trace/common.hpp"
#include "barretenberg/vm/avm/trace/helper.hpp"
#include "barretenberg/vm/aztec_constants.hpp"
#include "proof_surgeon.hpp"
#include <cstddef>
Expand Down Expand Up @@ -168,13 +170,28 @@ AggregationObjectIndices create_avm_recursion_constraints(Builder& builder,
// proof with public inputs reinserted std::vector<uint32_t> proof_indices =
// ProofSurgeon::create_indices_for_reconstructed_proof(input.proof, input.public_inputs);

std::vector<field_ct> proof_fields;
proof_fields.reserve(input.proof.size());

for (const auto& idx : input.proof) {
auto field = field_ct::from_witness_index(&builder, idx);
proof_fields.emplace_back(field);
}
auto fields_from_witnesses = [&](std::vector<uint32_t> const& input) {
std::vector<field_ct> result;
result.reserve(input.size());
for (const auto& idx : input) {
auto field = field_ct::from_witness_index(&builder, idx);
result.emplace_back(field);
}
return result;
};

const auto proof_fields = fields_from_witnesses(input.proof);
const auto public_inputs_flattened = fields_from_witnesses(input.public_inputs);

auto it = public_inputs_flattened.begin();
avm_trace::VmPublicInputs<field_ct> vm_public_inputs =
avm_trace::convert_public_inputs(std::vector(it, it + PUBLIC_CIRCUIT_PUBLIC_INPUTS_LENGTH));
it += PUBLIC_CIRCUIT_PUBLIC_INPUTS_LENGTH;
std::vector<field_ct> calldata(it, it + AVM_PUBLIC_COLUMN_MAX_SIZE);
it += AVM_PUBLIC_COLUMN_MAX_SIZE;
std::vector<field_ct> return_data(it, it + AVM_PUBLIC_COLUMN_MAX_SIZE);

auto public_inputs_vectors = avm_trace::copy_public_inputs_columns(vm_public_inputs, calldata, return_data);

// Populate the key fields and proof fields with dummy values to prevent issues (e.g. points must be on curve).
if (!has_valid_witness_assignments) {
Expand All @@ -186,7 +203,7 @@ AggregationObjectIndices create_avm_recursion_constraints(Builder& builder,
RecursiveVerifier verifier(&builder, vkey);
aggregation_state_ct input_agg_obj = bb::stdlib::recursion::convert_witness_indices_to_agg_obj<Builder, bn254>(
builder, input_aggregation_object_indices);
aggregation_state_ct output_agg_object = verifier.verify_proof(proof_fields, input_agg_obj);
aggregation_state_ct output_agg_object = verifier.verify_proof(proof_fields, public_inputs_vectors, input_agg_obj);
// TODO(https://github.com/AztecProtocol/barretenberg/issues/996): investigate whether assert_equal on public
// inputs is important, like what the plonk recursion constraint does.

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,10 @@
#include "barretenberg/vm/avm/generated/prover.hpp"
#include "barretenberg/vm/avm/generated/verifier.hpp"
#include "barretenberg/vm/avm/tests/helpers.test.hpp"
#include "barretenberg/vm/avm/trace/helper.hpp"
#include "barretenberg/vm/avm/trace/trace.hpp"
#include "barretenberg/vm/aztec_constants.hpp"
#include "barretenberg/vm/constants.hpp"
#include "proof_surgeon.hpp"
#include <gtest/gtest.h>
#include <memory>
Expand All @@ -39,14 +42,9 @@ class AcirAvmRecursionConstraint : public ::testing::Test {

static void SetUpTestSuite() { bb::srs::init_crs_factory("../srs_db/ignition"); }

static InnerBuilder create_inner_circuit()
static InnerBuilder create_inner_circuit(const std::vector<FF>& kernel_public_inputs_vec)
{
VmPublicInputs public_inputs;
std::array<FF, KERNEL_INPUTS_LENGTH> kernel_inputs{};
kernel_inputs.at(DA_GAS_LEFT_CONTEXT_INPUTS_OFFSET) = 1000000;
kernel_inputs.at(L2_GAS_LEFT_CONTEXT_INPUTS_OFFSET) = 1000000;
std::get<0>(public_inputs) = kernel_inputs;

auto public_inputs = convert_public_inputs(kernel_public_inputs_vec);
AvmTraceBuilder trace_builder(public_inputs);
InnerBuilder builder;

Expand All @@ -66,7 +64,8 @@ class AcirAvmRecursionConstraint : public ::testing::Test {
/**
* @brief Create a circuit that recursively verifies one or more inner avm circuits
*/
static OuterBuilder create_outer_circuit(std::vector<InnerBuilder>& inner_avm_circuits)
static OuterBuilder create_outer_circuit(std::vector<InnerBuilder>& inner_avm_circuits,
const std::vector<FF>& kernel_public_inputs_vec)
{
std::vector<RecursionConstraint> avm_recursion_constraints;

Expand All @@ -80,6 +79,9 @@ class AcirAvmRecursionConstraint : public ::testing::Test {
std::vector<fr> key_witnesses = verifier.key->to_field_elements();
std::vector<fr> proof_witnesses = prover.construct_proof();

std::vector<FF> public_inputs_vec(kernel_public_inputs_vec);
public_inputs_vec.resize(AVM_PUBLIC_INPUTS_FLATTENED_SIZE);

// Helper to append some values to the witness vector and return their corresponding indices
auto add_to_witness_and_track_indices =
[&witness](const std::vector<bb::fr>& input) -> std::vector<uint32_t> {
Expand All @@ -96,7 +98,7 @@ class AcirAvmRecursionConstraint : public ::testing::Test {
RecursionConstraint avm_recursion_constraint{
.key = add_to_witness_and_track_indices(key_witnesses),
.proof = add_to_witness_and_track_indices(proof_witnesses),
.public_inputs = {},
.public_inputs = add_to_witness_and_track_indices(public_inputs_vec),
.key_hash = 0, // not used
.proof_type = AVM,
};
Expand All @@ -121,9 +123,14 @@ class AcirAvmRecursionConstraint : public ::testing::Test {

TEST_F(AcirAvmRecursionConstraint, TestBasicSingleAvmRecursionConstraint)
{
std::vector<FF> public_inputs_vec;
public_inputs_vec.resize(PUBLIC_CIRCUIT_PUBLIC_INPUTS_LENGTH);
public_inputs_vec.at(L2_START_GAS_LEFT_PCPI_OFFSET) = FF(1000000);
public_inputs_vec.at(DA_START_GAS_LEFT_PCPI_OFFSET) = FF(1000000);

std::vector<InnerBuilder> layer_1_circuits;
layer_1_circuits.push_back(create_inner_circuit());
auto layer_2_circuit = create_outer_circuit(layer_1_circuits);
layer_1_circuits.push_back(create_inner_circuit(public_inputs_vec));
auto layer_2_circuit = create_outer_circuit(layer_1_circuits, public_inputs_vec);

info("circuit gates = ", layer_2_circuit.get_num_gates());

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -15,13 +15,6 @@

namespace bb {

// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
template <typename Fr> std::shared_ptr<Fr[]> _allocate_aligned_memory(const size_t n_elements)
{
// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
return std::static_pointer_cast<Fr[]>(get_mem_slab(sizeof(Fr) * n_elements));
}

template <typename Fr> void LegacyPolynomial<Fr>::allocate_backing_memory(size_t n_elements)
{
size_ = n_elements;
Expand Down
61 changes: 1 addition & 60 deletions barretenberg/cpp/src/barretenberg/polynomials/polynomial.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -18,13 +18,6 @@

namespace bb {

// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
template <typename Fr> std::shared_ptr<Fr[]> _allocate_aligned_memory(size_t n_elements)
{
// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
return std::static_pointer_cast<Fr[]>(get_mem_slab(sizeof(Fr) * n_elements));
}

// Note: This function is pretty gnarly, but we try to make it the only function that deals
// with copying polynomials. It should be scrutinized thusly.
template <typename Fr>
Expand Down Expand Up @@ -187,58 +180,7 @@ template <typename Fr> Fr Polynomial<Fr>::evaluate(const Fr& z) const

template <typename Fr> Fr Polynomial<Fr>::evaluate_mle(std::span<const Fr> evaluation_points, bool shift) const
{
if (size() == 0) {
return Fr(0);
}

const size_t n = evaluation_points.size();
const size_t dim = numeric::get_msb(end_index() - 1) + 1; // Round up to next power of 2

// To simplify handling of edge cases, we assume that the index space is always a power of 2
ASSERT(virtual_size() == static_cast<size_t>(1 << n));

// We first fold over dim rounds l = 0,...,dim-1.
// in round l, n_l is the size of the buffer containing the Polynomial partially evaluated
// at u₀,..., u_l.
// In round 0, this is half the size of dim
size_t n_l = 1 << (dim - 1);

// temporary buffer of half the size of the Polynomial
// TODO(https://github.com/AztecProtocol/barretenberg/issues/1096): Make this a Polynomial with DontZeroMemory::FLAG
auto tmp_ptr = _allocate_aligned_memory<Fr>(sizeof(Fr) * n_l);
auto tmp = tmp_ptr.get();

size_t offset = 0;
if (shift) {
ASSERT((*this)[0] == Fr::zero());
offset++;
}

Fr u_l = evaluation_points[0];
for (size_t i = 0; i < n_l; ++i) {
// curr[i] = (Fr(1) - u_l) * prev[i * 2] + u_l * prev[(i * 2) + 1];
// Note: i * 2 + 1 + offset might equal virtual_size. This used to subtlely be handled by extra capacity padding
// (and there used to be no assert time checks, which this constant helps with).
const size_t ALLOW_ONE_PAST_READ = 1;
tmp[i] = get(i * 2 + offset) + u_l * (get(i * 2 + 1 + offset, ALLOW_ONE_PAST_READ) - get(i * 2 + offset));
}

// partially evaluate the dim-1 remaining points
for (size_t l = 1; l < dim; ++l) {
n_l = 1 << (dim - l - 1);
u_l = evaluation_points[l];
for (size_t i = 0; i < n_l; ++i) {
tmp[i] = tmp[i * 2] + u_l * (tmp[(i * 2) + 1] - tmp[i * 2]);
}
}
auto result = tmp[0];

// We handle the "trivial" dimensions which are full of zeros.
for (size_t i = dim; i < n; i++) {
result *= (Fr(1) - evaluation_points[i]);
}

return result;
return _evaluate_mle(evaluation_points, coefficients_, shift);
}

template <typename Fr> Polynomial<Fr> Polynomial<Fr>::partial_evaluate_mle(std::span<const Fr> evaluation_points) const
Expand Down Expand Up @@ -384,5 +326,4 @@ template <typename Fr> Polynomial<Fr> Polynomial<Fr>::shifted() const

template class Polynomial<bb::fr>;
template class Polynomial<grumpkin::fr>;

} // namespace bb
93 changes: 90 additions & 3 deletions barretenberg/cpp/src/barretenberg/polynomials/polynomial.hpp
Original file line number Diff line number Diff line change
Expand Up @@ -3,13 +3,13 @@
#include "barretenberg/common/zip_view.hpp"
#include "barretenberg/crypto/sha256/sha256.hpp"
#include "barretenberg/ecc/curves/grumpkin/grumpkin.hpp"
#include "barretenberg/plonk_honk_shared/types/circuit_type.hpp"
#include "barretenberg/polynomials/shared_shifted_virtual_zeroes_array.hpp"
#include "evaluation_domain.hpp"
#include "polynomial_arithmetic.hpp"
#include <cstddef>
#include <fstream>
#include <ranges>

namespace bb {

/* Span class with a start index offset.
Expand Down Expand Up @@ -363,7 +363,95 @@ template <typename Fr> class Polynomial {
SharedShiftedVirtualZeroesArray<Fr> coefficients_;
};

template <typename Fr> inline std::ostream& operator<<(std::ostream& os, Polynomial<Fr> const& p)
// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
template <typename Fr> std::shared_ptr<Fr[]> _allocate_aligned_memory(size_t n_elements)
{
// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
return std::static_pointer_cast<Fr[]>(get_mem_slab(sizeof(Fr) * n_elements));
}

/**
* @brief Internal implementation to support both native and stdlib circuit field types.
* @details Instantiation with circuit field type is always called with shift == false
*/
template <typename Fr_>
Fr_ _evaluate_mle(std::span<const Fr_> evaluation_points,
const SharedShiftedVirtualZeroesArray<Fr_>& coefficients,
bool shift)
{
constexpr bool is_native = IsAnyOf<Fr_, bb::fr, grumpkin::fr>;
// shift ==> native
ASSERT(!shift || is_native);

if (coefficients.size() == 0) {
return Fr_(0);
}

const size_t n = evaluation_points.size();
const size_t dim = numeric::get_msb(coefficients.end_ - 1) + 1; // Round up to next power of 2

// To simplify handling of edge cases, we assume that the index space is always a power of 2
ASSERT(coefficients.virtual_size() == static_cast<size_t>(1 << n));

// We first fold over dim rounds l = 0,...,dim-1.
// in round l, n_l is the size of the buffer containing the Polynomial partially evaluated
// at u₀,..., u_l.
// In round 0, this is half the size of dim
size_t n_l = 1 << (dim - 1);

// temporary buffer of half the size of the Polynomial
// TODO(https://github.com/AztecProtocol/barretenberg/issues/1096): Make this a Polynomial with DontZeroMemory::FLAG
auto tmp_ptr = _allocate_aligned_memory<Fr_>(sizeof(Fr_) * n_l);
auto tmp = tmp_ptr.get();

size_t offset = 0;
if constexpr (is_native) {
if (shift) {
ASSERT(coefficients.get(0) == Fr_::zero());
offset++;
}
}

Fr_ u_l = evaluation_points[0];

// Note below: i * 2 + 1 + offset might equal virtual_size. This used to subtlely be handled by extra capacity
// padding (and there used to be no assert time checks, which this constant helps with).
const size_t ALLOW_ONE_PAST_READ = 1;
for (size_t i = 0; i < n_l; ++i) {
// curr[i] = (Fr(1) - u_l) * prev[i * 2] + u_l * prev[(i * 2) + 1];
tmp[i] = coefficients.get(i * 2 + offset) +
u_l * (coefficients.get(i * 2 + 1 + offset, ALLOW_ONE_PAST_READ) - coefficients.get(i * 2 + offset));
}

// partially evaluate the dim-1 remaining points
for (size_t l = 1; l < dim; ++l) {
n_l = 1 << (dim - l - 1);
u_l = evaluation_points[l];
for (size_t i = 0; i < n_l; ++i) {
tmp[i] = tmp[i * 2] + u_l * (tmp[(i * 2) + 1] - tmp[i * 2]);
}
}
auto result = tmp[0];

// We handle the "trivial" dimensions which are full of zeros.
for (size_t i = dim; i < n; i++) {
result *= (Fr_(1) - evaluation_points[i]);
}

return result;
}

/**
* @brief Static exposed implementation to support both native and stdlib circuit field types.
*/
template <typename Fr_>
Fr_ generic_evaluate_mle(std::span<const Fr_> evaluation_points,
const SharedShiftedVirtualZeroesArray<Fr_>& coefficients)
{
return _evaluate_mle(evaluation_points, coefficients, false);
}

template <typename Fr> inline std::ostream& operator<<(std::ostream& os, const Polynomial<Fr>& p)
{
if (p.size() == 0) {
return os << "[]";
Expand All @@ -387,5 +475,4 @@ template <typename Poly, typename... Polys> auto zip_polys(Poly&& poly, Polys&&.
ASSERT((poly.start_index() == polys.start_index() && poly.end_index() == polys.end_index()) && ...);
return zip_view(poly.indices(), poly.coeffs(), polys.coeffs()...);
}

} // namespace bb
Original file line number Diff line number Diff line change
Expand Up @@ -438,12 +438,6 @@ template <typename Builder> bool_t<Builder> bool_t<Builder>::implies(const bool_
return (!(*this) || other); // P => Q is equiv. to !P || Q (not(P) or Q).
}

/**
* (P => Q) && (P => R)
* <=> (!P || Q) && (!P || R)
* <=> !P || (Q && R) [by distributivity of propositional logic]
* <=> P => (Q && R) [a.k.a. distribution of implication over conjunction]
*/
template <typename Builder> void bool_t<Builder>::must_imply(const bool_t& other, std::string const& msg) const
{
(this->implies(other)).assert_equal(true, msg);
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,7 @@ inline FF AvmVerifier::evaluate_public_input_column(const std::vector<FF>& point
* @brief This function verifies an Avm Honk proof for given program settings.
*
*/
bool AvmVerifier::verify_proof(const HonkProof& proof,
[[maybe_unused]] const std::vector<std::vector<FF>>& public_inputs)
bool AvmVerifier::verify_proof(const HonkProof& proof, const std::vector<std::vector<FF>>& public_inputs)
{
using Flavor = AvmFlavor;
using FF = Flavor::FF;
Expand Down
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