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【Paddle Tensor 第二期 API支持 0-size Tensor】Fix frobenius_norm to support 0-size tensor #72570

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【Paddle Tensor 第二期 API支持 0-size Tensor】Fix frobenius_norm to support 0-size tensor #72570

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74f4ec2
[Tensor] Fix frobenius_norm to support 0-size tensor
hanlintang Apr 30, 2025
e939bfd
[Tensor] Drop resize of fro-norm
hanlintang May 1, 2025
2fdb545
[Tensor] Import utils with non-relative path
hanlintang May 1, 2025
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22 changes: 22 additions & 0 deletions paddle/phi/kernels/gpu/frobenius_norm_kernel.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@

#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/kernels/activation_kernel.h"
#include "paddle/phi/kernels/full_kernel.h"
#include "paddle/phi/kernels/funcs/activation_functor.h"
#include "paddle/phi/kernels/gpu/reduce.h"

Expand All @@ -28,6 +29,27 @@ void FrobeniusNormKernel(const Context& dev_ctx,
bool keep_dim,
bool reduce_all,
DenseTensor* out) {
if (x.numel() == 0) {
auto dim_x = x.dims();
std::set<int> axis_set;
for (auto ax : dims.GetData()) {
if (ax < 0) ax += dim_x.size();
axis_set.insert(ax);
}

std::vector<int64_t> out_dims_vec;
for (int i = 0; i < dim_x.size(); ++i) {
if (axis_set.count(i) == 0) {
out_dims_vec.push_back(dim_x[i]);
} else if (keep_dim) {
out_dims_vec.push_back(1);
}
}

phi::Full<T, Context>(
dev_ctx, phi::IntArray(out_dims_vec), static_cast<T>(0), out);
return;
}
reduce_all = recompute_reduce_all(x, dims.GetData(), reduce_all);
auto out_dtype = x.dtype();
phi::Reduce<T, kps::AddFunctor, kps::SquareFunctor>(
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5 changes: 5 additions & 0 deletions paddle/phi/kernels/impl/frobenius_norm_kernel_impl.h
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Expand Up @@ -27,6 +27,11 @@ void FrobeniusNormKernel(const Context& ctx,
bool keep_dim,
bool reduce_all,
DenseTensor* out) {
if (x.numel() == 0) {
ctx.template Alloc<T>(out);
phi::funcs::SetConstant<Context, T>()(ctx, out, 0);
return;
}
reduce_all = recompute_reduce_all(x, axis.GetData(), reduce_all);
Reduce<Context, T, funcs::FrobeniusNormFunctor>(
ctx, x, reduce_all, axis.GetData(), keep_dim, x.dtype(), out);
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