haojin2 commented on a change in pull request #15169: Softmax with length URL: https://github.com/apache/incubator-mxnet/pull/15169#discussion_r303676655
########## File path: src/operator/nn/softmax-inl.h ########## @@ -464,35 +755,56 @@ void SoftmaxGradCompute(const nnvm::NodeAttrs& attrs, mxnet::TShape shape = AxisShapeCompact(inputs[0].shape_, &axis, true); int out_idx = softmax_has_dtype_override(attrs) ? 2 : 1; + out_idx = softmax_use_length(attrs) ? 3 : out_idx; bool safe_acc = dmlc::GetEnv("MXNET_SAFE_ACCUMULATION", false); MXNET_REAL_ACC_TYPE_SWITCH(inputs[0].type_flag_, OType, AType, { MSHADOW_REAL_TYPE_SWITCH(outputs[0].type_flag_, DType, { MXNET_ASSIGN_REQ_SWITCH(req[0], Req, { - if (safe_acc) { - if (shape.ndim() == 2) { - SoftmaxGrad<OP1, OP2, Req, negate, AType>( - ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), - inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), - shape.get<2>(), axis, static_cast<DType>(temperature)); + if (!softmax_use_length(attrs)) { + if (safe_acc) { + if (shape.ndim() == 2) { + SoftmaxGrad<OP1, OP2, Req, negate, AType>( + ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), + inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), + shape.get<2>(), axis, static_cast<DType>(temperature)); + } else { + SoftmaxGrad<OP1, OP2, Req, negate, AType>( + ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), + inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), + shape.get<3>(), axis, static_cast<DType>(temperature)); + } } else { - SoftmaxGrad<OP1, OP2, Req, negate, AType>( - ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), - inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), - shape.get<3>(), axis, static_cast<DType>(temperature)); + if (shape.ndim() == 2) { + SoftmaxGrad<OP1, OP2, Req, negate, DType>( + ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), + inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), + shape.get<2>(), axis, static_cast<DType>(temperature)); + } else { + SoftmaxGrad<OP1, OP2, Req, negate, DType>( + ctx.get_stream<xpu>(), inputs[out_idx].dptr<OType>(), + inputs[0].dptr<OType>(), outputs[0].dptr<DType>(), + shape.get<3>(), axis, static_cast<DType>(temperature)); + } } } else { - if (shape.ndim() == 2) { - SoftmaxGrad<OP1, OP2, Req, negate, DType>( + MXNET_INT_TYPE_SWITCH(inputs[2].type_flag_, IType, { Review comment: No, because your are only looking at the CPU version of the code. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services