diff --git a/paddle/fluid/operators/lookup_table_op.h b/paddle/fluid/operators/lookup_table_op.h index a7d0fd4856edc74237151c64f286d468ad86e7ca..e20f417d76454ec9ba73dbe48506e7426ba1b79d 100644 --- a/paddle/fluid/operators/lookup_table_op.h +++ b/paddle/fluid/operators/lookup_table_op.h @@ -129,6 +129,7 @@ class LookupTableGradKernel : public framework::OpKernel { "must be either LoDTensor or SelectedRows"); } + int64_t padding_idx = context.Attr("padding_idx"); bool is_sparse = context.Attr("is_sparse"); // Since paddings are not trainable and fixed in forward, the gradient of // paddings makes no sense and we don't deal with it in backward. @@ -187,10 +188,12 @@ class LookupTableGradKernel : public framework::OpKernel { memset(d_table_data, 0, d_table->numel() * sizeof(T)); for (int64_t i = 0; i < ids->numel(); ++i) { - PADDLE_ENFORCE_LT(ids_data[i], N); - PADDLE_ENFORCE_GE(ids_data[i], 0); - for (int j = 0; j < D; ++j) { - d_table_data[ids_data[i] * D + j] += d_output_data[i * D + j]; + if (ids_data[i != padding_idx) { + PADDLE_ENFORCE_LT(ids_data[i], N); + PADDLE_ENFORCE_GE(ids_data[i], 0); + for (int j = 0; j < D; ++j) { + d_table_data[ids_data[i] * D + j] += d_output_data[i * D + j]; + } } } }