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fixed loops for generating indices #999

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Merged
pascoec merged 1 commit into from
Jun 11, 2025
Merged

fixed loops for generating indices #999

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12 changes: 8 additions & 4 deletions src/pke/lib/scheme/ckksrns/ckksrns-fhe.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -916,7 +916,8 @@ std::vector<uint32_t> FHECKKSRNS::FindCoeffsToSlotsRotationIndices(uint32_t slot

for (int32_t s = static_cast<int32_t>(levelBudget) - 1; s >= static_cast<int32_t>(flagRem); --s) {
const uint32_t scalingFactor = 1U << ((s - flagRem) * layersCollapse + remCollapse);
for (int32_t j = (1 - (numRotations + 1) / 2); j < static_cast<int32_t>(g); ++j) {
const int32_t halfRots = (1 - (numRotations + 1) / 2);
for (int32_t j = halfRots; j < static_cast<int32_t>(g + halfRots); ++j) {
indexList.emplace_back(ReduceRotation(j * scalingFactor, slots));
}
for (size_t i = 0; i < b; i++) {
Expand All @@ -925,7 +926,8 @@ std::vector<uint32_t> FHECKKSRNS::FindCoeffsToSlotsRotationIndices(uint32_t slot
}

if (flagRem) {
for (int32_t j = (1 - (numRotationsRem + 1) / 2); j < static_cast<int32_t>(gRem); ++j) {
const int32_t halfRots = (1 - (numRotationsRem + 1) / 2);
for (int32_t j = halfRots; j < static_cast<int32_t>(gRem + halfRots); ++j) {
indexList.emplace_back(ReduceRotation(j, slots));
}
for (size_t i = 0; i < bRem; i++) {
Expand Down Expand Up @@ -979,7 +981,8 @@ std::vector<uint32_t> FHECKKSRNS::FindSlotsToCoeffsRotationIndices(uint32_t slot

for (size_t s = 0; s < (levelBudget - flagRem); ++s) {
const uint32_t scalingFactor = 1U << (s * layersCollapse);
for (int32_t j = (1 - (numRotations + 1) / 2); j <= static_cast<int32_t>(g); ++j) {
const int32_t halfRots = (1 - (numRotations + 1) / 2);
for (int32_t j = halfRots; j < static_cast<int32_t>(g + halfRots); ++j) {
indexList.emplace_back(ReduceRotation(j * scalingFactor, M / 4));
}
for (size_t i = 0; i < b; ++i) {
Expand All @@ -990,7 +993,8 @@ std::vector<uint32_t> FHECKKSRNS::FindSlotsToCoeffsRotationIndices(uint32_t slot
if (flagRem) {
uint32_t s = levelBudget - flagRem;
const uint32_t scalingFactor = 1U << (s * layersCollapse);
for (int32_t j = (1 - (numRotationsRem + 1) / 2); j <= static_cast<int32_t>(gRem); ++j) {
const int32_t halfRots = (1 - (numRotationsRem + 1) / 2);
for (int32_t j = halfRots; j < static_cast<int32_t>(gRem + halfRots); ++j) {
indexList.emplace_back(ReduceRotation(j * scalingFactor, M / 4));
}
for (size_t i = 0; i < bRem; ++i) {
Expand Down