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#include "THCUNN.h"
#include "common.h"
#include "THCHalf.h"
#include "THCHalfAutoNumerics.cuh"
#include <stdio.h>
#include <assert.h>
static const int NTHREADS = 32;
template <typename Dtype>
__global__ void cunn_ClassNLLCriterion_updateOutput_kernel1(Dtype *output,
Dtype *total_weight,
Dtype *input,
THCIndex_t *target,
Dtype *weights,
int size_average,
int n_classes) {
assert(threadIdx.x == 0 && threadIdx.y == 0 && threadIdx.z == 0);
// TODO: T4951791 Reuse code between updateOutput_kernel1 and
// updateOutput_kernel.
int t = (int)*target - TH_INDEX_BASE;
assert(t >= -1 && t < n_classes);
if (t >= 0) {
Dtype cur_weight = weights ? weights[t] : ScalarConvert<int, Dtype>::to(1);
*output = -cur_weight * input[t];
*total_weight = cur_weight;
if (size_average && *total_weight > 0) {
*output /= *total_weight;
}
}
}
template <typename Dtype, typename Acctype>
__global__ void cunn_ClassNLLCriterion_updateOutput_kernel(Dtype *output,
Dtype *total_weight,
Dtype *input,
THCIndex_t *target,
Dtype *weights,
int size_average,
int nframe,
int ndim,
int n_classes) {
__shared__ Acctype shInputs[NTHREADS], acc_weight[NTHREADS];
int i, t;
Dtype cur_weight;
shInputs[threadIdx.x] = ScalarConvert<int, Acctype>::to(0);
acc_weight[threadIdx.x] = ScalarConvert<int, Acctype>::to(0);
for (i = threadIdx.x; i < nframe; i += NTHREADS) {
t = target[i] - TH_INDEX_BASE;
assert(t >= -1 && t < n_classes);
if (t >= 0) {
cur_weight = weights ? weights[t] : ScalarConvert<int, Dtype>::to(1);
shInputs[threadIdx.x] -= input[i * ndim + t] * cur_weight;
acc_weight[threadIdx.x] += cur_weight;
}
}
__syncthreads();
// TODO: T4951791 Reuse code between updateOutput_kernel1 and
// updateOutput_kernel
if (threadIdx.x == 0) {
*output = *total_weight = ScalarConvert<int, Dtype>::to(0);
Acctype outputAcc = 0;
Acctype total_weightAcc = 0;
for (i = 0; i < NTHREADS; ++i){
// FIXME should we do somethigng here
outputAcc += shInputs[i];
total_weightAcc += acc_weight[i];
}
*total_weight = ScalarConvert<Acctype, Dtype>::to(total_weightAcc);
*output = ScalarConvert<Acctype, Dtype>::to(outputAcc);
if (size_average && *total_weight > 0) {
*output = ScalarConvert<Acctype, Dtype>::to(outputAcc / total_weightAcc);
}
}
}
template <typename Dtype>
__global__ void cunn_ClassNLLCriterion_updateGradInput_kernel1(
Dtype* gradInput,
Dtype* weights,
THCIndex_t* target,
Dtype* total_weight,
int size_average,
int n_classes)
{
if (*total_weight <= 0) {
return;
}
Dtype norm = size_average ? (ScalarConvert<int, Dtype>::to(1) / *total_weight) : ScalarConvert<int, Dtype>::to(1);
int t = (int)*target - TH_INDEX_BASE;
assert(t >= -1 && t < n_classes);
if (t >= 0) {
gradInput[t] = -(weights ? weights[t] : ScalarConvert<int, Dtype>::to(1)) * norm;
}
}
template <typename Dtype>
__global__ void cunn_ClassNLLCriterion_updateGradInput_kernel(
Dtype *gradInput,
THCIndex_t *target,
Dtype *weights,
Dtype *total_weight,
int size_average,
int nframe,
int ndim,
int n_classes)
{
if (*total_weight <= 0) {
return;
}
int i, t;
Dtype norm = size_average ? (ScalarConvert<int, Dtype>::to(1) / *total_weight) : ScalarConvert<int, Dtype>::to(1);
for (i = threadIdx.x; i < nframe; i += NTHREADS) {
t = (int)target[i] - TH_INDEX_BASE;
assert(t >= -1 && t < n_classes);
if (t >= 0) {
gradInput[i * ndim + t] = -(weights ? weights[t] : ScalarConvert<int, Dtype>::to(1)) * norm;
}
}
}
#include "generic/ClassNLLCriterion.cu"
#include "THCGenerateFloatTypes.h"
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