haojin2 commented on a change in pull request #15987: Numpy add numpy op rot90
URL: https://github.com/apache/incubator-mxnet/pull/15987#discussion_r318874396
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File path: src/operator/numpy/np_matrix_op-inl.h
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@@ -60,6 +60,246 @@ void NumpyTranspose(const nnvm::NodeAttrs& attrs,
}
}
+struct NumpyRot90Param : public dmlc::Parameter<NumpyRot90Param> {
+ int k;
+ dmlc::optional<mxnet::TShape> axes;
+ DMLC_DECLARE_PARAMETER(NumpyRot90Param) {
+ DMLC_DECLARE_FIELD(k)
+ .set_default(1)
+ .describe("Number of times the array is rotated by 90 degrees.");
+ DMLC_DECLARE_FIELD(axes)
+ .set_default(dmlc::optional<mxnet::TShape>())
+ .describe(" The array is rotated in the plane defined by the axes. Axes
must be different.");
+ }
+};
+
+struct rot90reverse {
+ MSHADOW_XINLINE static index_t ReverseIndex(index_t idx,
+ index_t nreversedim,
+ const index_t * stride_,
+ const index_t * trailing_) {
+ index_t outputIndex = idx;
+ for (index_t i = 0; i < nreversedim; ++i) {
+ const index_t low = outputIndex % trailing_[i];
+ index_t high = outputIndex / trailing_[i];
+ const index_t x = high % stride_[i];
+ high /= stride_[i];
+ outputIndex = (high * stride_[i] + stride_[i] - 1 - x) * trailing_[i] +
low;
+ }
+ return outputIndex;
+ }
+ template<typename DType>
+ MSHADOW_XINLINE static void Map(index_t index, index_t nreversedim, const
DType *src, DType *dst,
Review comment:
should have only 1 space after `MSHADOW_XINLINE`
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