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perf: reuse owned shell Jet Hessians in accumulation

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KOKO\Mimi
2026-10-21 08:16:05 +09:00
parent 2c92b11315
commit 7a6c096735
4 changed files with 263 additions and 5 deletions
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src/fesa/elements/nonlinear_mitc4_shell.cpp
+30 -3
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@@ -386,6 +386,9 @@ class Hessian {
/// @brief Identifies only the immutable zero Hessian, independently of seeds.
bool IsImplicitZero() const { return !values_; }
/// @brief Allows a consumed temporary to reuse only its own materialized data.
bool HasUniqueStorage() const { return values_ && values_.use_count() == 1; }
/// @brief Gets fresh output storage without redundant zero initialization.
/// @note Only fresh operator results use this pointer; all 576 entries must
/// be written before any read or copy of the result.
@@ -488,6 +491,30 @@ Jet operator+(const Jet& left, const Jet& right) {
return result;
}
/// @brief Adds to a consumed temporary without allocating another Hessian.
/// @note Shared/live aliases and unmasked exceptions retain the original path.
Jet operator+(Jet&& left, const Jet& right) {
if ((_mm_getcsr() & _MM_MASK_MASK) != _MM_MASK_MASK || &left == &right ||
!left.second.HasUniqueStorage())
return static_cast<const Jet&>(left) + right;
left.value = left.value + right.value;
left.directional_first = left.directional_first + right.directional_first;
left.directional_second = left.directional_second + right.directional_second;
for (std::size_t index = 0U; index < kGlobalDofCount; ++index) {
left.first[index] = left.first[index] + right.first[index];
left.mixed_first[index] = left.mixed_first[index] + right.mixed_first[index];
left.mixed_second[index] = left.mixed_second[index] + right.mixed_second[index];
}
left.constant_derivatives = left.constant_derivatives &&
right.constant_derivatives &&
std::isfinite(left.value);
const double* right_second = right.second.ReadData();
double* left_second = left.second.Data();
for (std::size_t index = 0U; index < kHessianSize; ++index)
left_second[index] = left_second[index] + right_second[index];
return std::move(left);
}
/// @brief Subtracts two second-order trial-coordinate quantities.
Jet operator-(const Jet& left, const Jet& right) {
Jet result{};
@@ -1105,7 +1132,7 @@ Jet FrameComponent(const JetVector3& left, const JetTensor& tensor,
Jet result{};
for (std::size_t row = 0U; row < 3U; ++row) {
for (std::size_t column = 0U; column < 3U; ++column) {
result = result + left[row] * tensor[row][column] * right[column];
result = std::move(result) + left[row] * tensor[row][column] * right[column];
}
}
return result;
@@ -1183,9 +1210,9 @@ Jet PhysicalEnergy(const std::array<Vector3, kNodeCount>& coordinates,
shear * strain[4U]};
Jet density{};
for (std::size_t component = 0U; component < strain.size(); ++component) {
density = density + strain[component] * stress[component];
density = std::move(density) + strain[component] * stress[component];
}
energy = energy + 0.5 * reference.reference_jacobian * density;
energy = std::move(energy) + 0.5 * reference.reference_jacobian * density;
}
}
if (!IsFinite(energy)) {