rewrite reducesumall

source/tensor/core/reduce/ReduceSumAll.cpp

@@ -46,6 +46,22 @@ sum all the items of the tensor (It should be optimized!)
 */
 */
 DTYPE _ReduceSumAll(const XTensor * source)
 DTYPE _ReduceSumAll(const XTensor * source)
 {
 {
+    int dims[2] = {1, source->unitNum};
+    int one = 1;
+    XTensor * all = NewTensorBuf(2, dims, source->dataType, source->denseRatio, source->devID, source->mem);
+    XTensor * result = NewTensorBuf(1, &one, source->dataType, 1.0F, source->devID, source->mem);
+
+    _CopyValues(source, all);
+
+    _ReduceSum(all, result, 1);
+
+    DTYPE r = result->Get1D(0);
+
+    DelTensorBuf(result);
+    DelTensorBuf(all);
+
+    return r;
+
     int order = source->order;
     int order = source->order;
     DTYPE summation;
     DTYPE summation;