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#pragma once
#include <cmath>
#include <cublas_v2.h>
#include <thrust/device_vector.h>
#include <thrust/functional.h>
namespace thrust
{
namespace detail
{
namespace functional
{
template<typename T>
struct unary_exp : public thrust::unary_function<T,T> {
__host__ __device__
T operator()(const T &x) const {
float x2 = x;
float clip = 16;
if(x2 > clip)
x2 = clip;
if(x2 < -clip)
x2 = -clip;
return expf(x2);
}
};
template<typename Eval>
__host__ __device__
actor<composite<unary_operator<unary_exp>, actor<Eval>>>
Exp(const actor<Eval> &_1) {
return compose(unary_operator<unary_exp>(), _1);
}
template<typename T>
struct unary_log : public thrust::unary_function<T,T> {
__host__ __device__
T operator()(const T &x) const {
float x2 = x;
if(x2 < 10e-10)
x2 = 10e-10;
return logf(x2);
}
};
template<typename Eval>
__host__ __device__
actor<composite<unary_operator<unary_log>, actor<Eval>>>
Log(const actor<Eval> &_1) {
return compose(unary_operator<unary_log>(), _1);
}
template<typename T>
struct unary_sigma : public thrust::unary_function<T,T> {
__host__ __device__
T operator()(const T &x) const {
float x2 = x;
float clip = 16;
if(x2 > clip)
x2 = clip;
if(x2 < -clip)
x2 = -clip;
return 1.0 / (1.0 + expf(-x2));
}
};
template<typename Eval>
__host__ __device__
actor<composite<unary_operator<unary_sigma>, actor<Eval>>>
Sigma(const actor<Eval> &_1) {
return compose(unary_operator<unary_sigma>(), _1);
}
template<typename T>
struct unary_tanh : public thrust::unary_function<T,T> {
__host__ __device__
T operator()(const T &x) const { return tanhf(x); }
};
template<typename Eval>
__host__ __device__
actor<composite<unary_operator<unary_tanh>, actor<Eval>>>
Tanh(const actor<Eval> &_1) {
return compose(unary_operator<unary_tanh>(), _1);
}
template<typename T1, typename T2>
__host__ __device__
actor<composite<binary_operator<thrust::maximum>, actor<T1>, actor<T2>>>
Max(const actor<T1> &_1, const actor<T2> &_2) {
return compose(binary_operator<thrust::maximum>(),
make_actor(_1),
make_actor(_2));
}
}
}
}
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