7 #ifndef MSHADOW_EXTENSION_MASK_H_ 8 #define MSHADOW_EXTENSION_MASK_H_ 10 #include "../extension.h" 20 template<
typename IndexExp,
typename SrcExp,
typename DType>
21 struct MaskExp:
public Exp<MaskExp<IndexExp, SrcExp, DType>,
22 DType, type::kChainer> {
28 MaskExp(
const IndexExp &index,
const SrcExp &src)
29 : index_(index), src_(src) {}
34 template<
typename IndexExp,
49 template<
typename IndexExp,
typename SrcExp,
typename DType>
57 return static_cast<DType
>(
src_.Eval(y, x) *
index_.Eval(0, y));
65 template<
typename IndexExp,
typename SrcExp,
typename DType>
71 template<
int dim,
typename IndexExp,
typename SrcExp,
typename DType>
76 <<
"MaskExp only support 2D output";
79 CHECK_EQ(dshape[0], wshape[0]) <<
"MaskExp require inputs in same first dimention";
88 template<
typename IndexExp,
typename SrcExp,
typename DType>
90 static const int kDim = 2;
97 #endif // MSHADOW_EXTENSION_MASK_H_ MaskExp(const IndexExp &index, const SrcExp &src)
Definition: mask.h:28
Definition: expr_engine-inl.h:40
const SrcExp & src_
matrix oprand
Definition: mask.h:26
static Shape< dim > Check(const MaskExp< IndexExp, SrcExp, DType > &t)
Definition: mask.h:74
const IndexExp & index_
index oprand
Definition: mask.h:24
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
MaskExp< IndexExp, SrcExp, DType > mask(const Exp< IndexExp, DType, e1 > &index, const Exp< SrcExp, DType, e2 > &src)
Definition: mask.h:39
Plan(const MaskExp< IndexExp, SrcExp, DType > &e)
Definition: mask.h:52
int32_t index_t
type that will be used for index
Definition: base.h:291
Broadcast a mask and do element-wise multiplication.
Definition: mask.h:21
runtime shape checking template get the shape of an expression, report error if shape mismatch ...
Definition: expr_engine-inl.h:346
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
namespace for mshadow
Definition: base.h:282
MSHADOW_XINLINE DType Eval(index_t y, index_t x) const
Definition: mask.h:56