7 #ifndef MSHADOW_EXTENSION_REDUCE_WITH_AXIS_H_ 8 #define MSHADOW_EXTENSION_REDUCE_WITH_AXIS_H_ 10 #include "../extension.h" 20 template<
typename Reducer,
typename SrcExp,
typename DType,
int dimsrc,
bool mask,
int dimdst>
22 public MakeTensorExp<ReduceWithAxisExp<Reducer, SrcExp, DType, dimsrc, mask, dimdst>,
23 SrcExp, dimdst, DType> {
37 bool keepdim = (dimsrc == dimdst);
38 CHECK(dimsrc > axis) <<
"reduce axis out of bound";
40 for (
int i = 0; i < axis; ++i) {
41 this->
shape_[i] = src_shape[i];
43 this->size_ = src_shape[axis];
46 for (
int i = axis + 1; i < dimsrc; ++i) {
47 this->trailing_ *= src_shape[i];
48 this->
shape_[i - 1] = src_shape[i];
52 for (
index_t i = axis + 1; i < dimsrc; ++i) {
53 this->trailing_ *= src_shape[i];
54 this->
shape_[i] = src_shape[i];
58 this->last_ = src_shape[dimsrc - 1];
59 this->last_dst_dim_ = this->
shape_[dimdst - 1];
71 template<
typename Reducer,
bool mask,
typename SrcExp,
typename DType,
int etype>
75 return ReduceWithAxisExp<Reducer, SrcExp, DType, ExpInfo<SrcExp>::kDim,
mask,
87 template<
typename Reducer,
bool mask,
typename SrcExp,
typename DType,
int etype>
88 inline ReduceWithAxisExp<Reducer, SrcExp, DType, ExpInfo<SrcExp>::kDim,
mask,
91 return ReduceWithAxisExp<Reducer, SrcExp, DType, ExpInfo<SrcExp>::kDim,
mask,
98 template<
typename Reducer,
typename SrcExp,
typename DType,
int dimsrc,
bool mask,
int dimdst>
110 DType res; Reducer::SetInitValue(res);
119 return static_cast<DType
>(
static_cast<int>(idx));
121 DType res; Reducer::SetInitValue(res);
136 #endif // MSHADOW_EXTENSION_REDUCE_WITH_AXIS_H_ index_t last_
size of last src dimension
Definition: reduce_with_axis.h:33
Definition: expr_engine-inl.h:40
static Shape< dim > Check(const E &t)
#define MSHADOW_XINLINE
Definition: base.h:204
static type inference template, used to get the dimension of each expression, if ExpInfo<E>::kDim == ...
Definition: expr_engine-inl.h:244
MSHADOW_XINLINE bool IsNan(volatile DType val)
Definition: base.h:620
MaskExp< IndexExp, SrcExp, DType > mask(const Exp< IndexExp, DType, e1 > &index, const Exp< SrcExp, DType, e2 > &src)
Definition: mask.h:39
const SrcExp & src_
source oprand
Definition: reduce_with_axis.h:25
int32_t index_t
type that will be used for index
Definition: base.h:291
MSHADOW_XINLINE DType Eval(index_t i, index_t j) const
Definition: reduce_with_axis.h:104
index_t size_
size of axis dimension
Definition: reduce_with_axis.h:31
ReduceWithAxisExp< Reducer, SrcExp, DType, ExpInfo< SrcExp >::kDim, mask, ExpInfo< SrcExp >::kDim-1 > reduce_with_axis(const Exp< SrcExp, DType, etype > &src, int axis)
reduce out the dimension of src labeled by axis.
Definition: reduce_with_axis.h:74
ReduceWithAxisExp(const SrcExp &src, int axis)
Definition: reduce_with_axis.h:35
reduce out the dimension of src labeled by axis.
Definition: reduce_with_axis.h:21
defines how expression exp can be evaluated and stored into dst
Definition: expression.h:61
const SubType & self(void) const
Definition: expression.h:64
Plan< BinaryMapExp< OP, TA, TB, DType, etype >, DType > MakePlan(const BinaryMapExp< OP, TA, TB, DType, etype > &e)
Definition: expr_engine-inl.h:221
ReduceWithAxisExp< Reducer, SrcExp, DType, ExpInfo< SrcExp >::kDim, mask, ExpInfo< SrcExp >::kDim > reduce_keepdim(const Exp< SrcExp, DType, etype > &src, int axis)
reduce out the dimension of src labeled by axis, keepdim turned on.
Definition: reduce_with_axis.h:90
a general class that allows extension that makes tensors of some shape
Definition: expr_engine-inl.h:25
namespace for mshadow
Definition: base.h:282
Shape< dim > shape_
the shape of this expression
Definition: expr_engine-inl.h:29
Plan(const ReduceWithAxisExp< Reducer, SrcExp, DType, dimsrc, mask, dimdst > &e)
Definition: reduce_with_axis.h:101
index_t trailing_
size of trailing dimensions
Definition: reduce_with_axis.h:29
index_t last_dst_dim_
size of last destination dimension
Definition: reduce_with_axis.h:27