fix int8 overflow

example/09_convnd_fwd/run_convnd_fwd_dl_example.inc

@@ -11,7 +11,7 @@ bool run_convnd_fwd_dl_example(int argc, char* argv[])
     bool time_kernel     = false;
 
     ck::utils::conv::ConvParam conv_param{
-        2, 1, 128, 128, 192, {3, 3}, {14, 14}, {1, 1}, {1, 1}, {0, 0}, {0, 0}};
+        2, 1, 128, 256, 192, {3, 3}, {71, 71}, {2, 2}, {1, 1}, {1, 1}, {1, 1}};
 
     if(argc == 1)
     {

include/ck/tensor_operation/gpu/element/binary_element_wise_operation.hpp

@@ -192,7 +192,7 @@ struct AddRelu
     __host__ __device__ constexpr void
     operator()<int, int, int8_t>(int& y, const int& x0, const int8_t& x1) const
     {
-        const int a = x0 + x1;
+        const int8_t a = x0 + x1;
         y              = a > 0 ? a : 0;
     };