45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
#pragma once
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#include <ATen/WrapDimUtils.h>
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#include <c10/core/TensorImpl.h>
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#include <c10/util/irange.h>
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#include <bitset>
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#include <sstream>
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namespace at {
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// This is in an extra file to work around strange interaction of
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// bitset on Windows with operator overloading
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constexpr size_t dim_bitset_size = 64;
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static inline std::bitset<dim_bitset_size> dim_list_to_bitset(
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OptionalIntArrayRef opt_dims,
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size_t ndims) {
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TORCH_CHECK(
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ndims <= dim_bitset_size,
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"only tensors with up to ",
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dim_bitset_size,
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" dims are supported");
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std::bitset<dim_bitset_size> seen;
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if (opt_dims.has_value()) {
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auto dims = opt_dims.value();
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for (const auto i : c10::irange(dims.size())) {
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size_t dim = maybe_wrap_dim(dims[i], static_cast<int64_t>(ndims));
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TORCH_CHECK(
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!seen[dim],
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"dim ",
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dim,
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" appears multiple times in the list of dims");
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seen[dim] = true;
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}
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} else {
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for (size_t dim = 0; dim < ndims; dim++) {
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seen[dim] = true;
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}
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}
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return seen;
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}
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} // namespace at
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