wkcn commented on a change in pull request #16234: [MXNET-1426] Fix the wrong result of sum, mean, argmin, argmax when inputs contain inf or nan URL: https://github.com/apache/incubator-mxnet/pull/16234#discussion_r327379713
########## File path: 3rdparty/mshadow/mshadow/extension/reduce_with_axis.h ########## @@ -112,7 +112,7 @@ struct Plan<ReduceWithAxisExp<Reducer, SrcExp, DType, dimsrc, mask, dimdst>, DTy index_t z = (x*size_+k)*trailing_+y; DType tmp = res; Reducer::Reduce(res, src_.Eval(z/last_, z%last_)); - if (tmp != res) { + if (tmp != res && !isnan_typed::IsNan(tmp)) { Review comment: It is necessary to check NaN. For example, argmin/argmax should return the first index in the array [NaN, NaN], however (NaN != NaN) is true. ---------------------------------------------------------------- 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