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#pragma once
#include "functional/defs.h"
#include "functional/tensor.h"
#include "functional/array.h"
namespace marian {
namespace functional {
template <size_t K, class Functor>
struct FApply {};
template <class Functor>
struct FApply<1, Functor> {
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 1>& in,
const functional::Array<int, 1>& indices) {
return functor(in[0][indices[0]]);
}
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 1>& in,
int index) {
return functor(in[0][index]);
}
};
template <class Functor>
struct FApply<2, Functor> {
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 2>& in,
const functional::Array<int, 2>& indices) {
return functor(in[0][indices[0]], in[1][indices[1]]);
}
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 2>& in,
int index) {
return functor(in[0][index], in[1][index]);
}
};
template <class Functor>
struct FApply<3, Functor> {
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 3>& in,
const functional::Array<int, 3>& indices) {
return functor(in[0][indices[0]], in[1][indices[1]], in[2][indices[2]]);
}
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 3>& in,
int index) {
return functor(in[0][index], in[1][index], in[2][index]);
}
};
template <class Functor>
struct FApply<4, Functor> {
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 4>& in,
const functional::Array<int, 4>& indices) {
return functor(in[0][indices[0]],
in[1][indices[1]],
in[2][indices[2]],
in[3][indices[3]]);
}
__HDI__ static float apply(
Functor functor,
functional::Array<functional::Tensor<float>, 4>& in,
int index) {
return functor(in[0][index], in[1][index], in[2][index], in[3][index]);
}
};
template <size_t K, class Functor>
__HDI__ float apply(Functor functor,
functional::Array<functional::Tensor<float>, K>& in,
const functional::Array<int, K>& indices) {
return FApply<K, Functor>::apply(functor, in, indices);
}
template <size_t K, class Functor>
__HDI__ float apply(Functor functor,
functional::Array<functional::Tensor<float>, K>& in,
int index) {
return FApply<K, Functor>::apply(functor, in, index);
}
/******************************************************************************/
template <size_t n, size_t N, size_t K>
struct Loop {
template <class Functor>
__HDI__ static float result(
Functor functor,
functional::Array<functional::Tensor<float>, K>& in,
const functional::Array<int, K>& pAcc,
const functional::Array<int, N>& length,
const functional::Array<int, N>& dim) {
float sum = 0;
functional::Array<int, K> acc;
for(int i = 0; i < length[N - n]; ++i) {
for(int j = 0; j < K; ++j) {
acc[j] = pAcc[j] + (dim[N - n] + i) * in[j].shape().bstride(N - n);
}
sum += Loop<n - 1, N, K>::result(functor, in, acc, length, dim);
}
return sum;
}
};
template <size_t N, size_t K>
struct Loop<1, N, K> {
template <class Functor>
__HDI__ static float result(
Functor functor,
functional::Array<functional::Tensor<float>, K>& in,
const functional::Array<int, K>& pAcc,
const functional::Array<int, N>& length,
const functional::Array<int, N>& dim) {
float sum = 0;
functional::Array<int, K> acc;
for(int i = 0; i < length[N - 1]; ++i) {
for(int j = 0; j < K; ++j) {
acc[j] = pAcc[j] + (dim[N - 1] + i) * in[j].shape().bstride(N - 1);
}
sum += apply<K>(functor, in, acc);
}
return sum;
}
};
template <size_t N, size_t K, class Functor>
__HDI__ float loops(Functor functor,
functional::Array<functional::Tensor<float>, K>& in,
const functional::Array<int, N>& length,
const functional::Array<int, N>& dim) {
functional::Array<int, K> acc = {0};
return Loop<N, N, K>::result(functor, in, acc, length, dim);
}
}
}
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