@ -164,7 +164,7 @@ void HierarchicalSigmoidLayer::backward(const UpdateCallback& callback) {
cpuBias_ = biases_grad;
}
preOutput_.grad->addByBitCodeBackward(numClasses_, *cpuLabel_, *cpuBias_);
if (useGpu) {
if (useGpu_) {
biases_grad->copyFrom(*cpuBias_);
} else {
biases_grad = cpuBias_;