L1Cost.cu

#include "THCUNN.h"
#include "common.h"
#include "THCHalf.h"
#include "THCHalfAutoNumerics.cuh"

#include <thrust/device_ptr.h>
#include <thrust/reduce.h>
#include <thrust/transform_reduce.h>

template <typename Dtype, typename Acctype>
struct l1cost_functor
{
  __host__ __device__ Acctype operator()(Dtype x) const
  {
    return THCNumerics<Acctype>::abs(ScalarConvert<Dtype, Acctype>::to(x));
  }
};

template <typename Dtype>
struct l1cost_updateGradInput_functor
{
  __host__ __device__ Dtype operator()(Dtype x) const
  {
    if (x > 0)
      return ScalarConvert<int, Dtype>::to(1);
    else if (x < 0)
      return ScalarConvert<int, Dtype>::to(-1);
    else
      return ScalarConvert<int, Dtype>::to(0);
  }
};

#include "generic/L1Cost.cu"
#include "THCGenerateFloatTypes.h"