fix relu6 bug

lite/tests/math/gemv_int8_compute_test.cc

@@ -157,6 +157,7 @@ bool test_gemv_int8(bool tra,
                                           tc_basic_fp32.numel());
     if (flag_act == 2) { // relu6
       for (int i = 0; i < tc_basic_int8.numel(); i++) {
+        dc_basic_fp32[i] = dc_basic_fp32[i] > six ? six : dc_basic_fp32[i];
         dc_basic_int8[i] = dc_basic_int8[i] > six ? six : dc_basic_int8[i];
       }
     }

lite/tests/math/sgemv_compute_test.cc

@@ -108,6 +108,11 @@ bool test_sgemv(bool tra,
                flag_act,
                six,
                alpha);
+    if (flag_act == 2) { // relu6
+      for (int i = 0; i < tc_basic.numel(); i++) {
+        dc_basic[i] = dc_basic[i] > six ? six : dc_basic[i];
+      }
+    }
   }
   paddle::lite::profile::Timer t0;
   //! compute

lite/tests/utils/naive_math_impl.h

@@ -202,7 +202,7 @@ static void basic_gemv(int m,
         c[i] = tmp > (type2)0 ? tmp : (type2)0;
       } else if (flag_act == 2) {  // relu 6
         c[i] = tmp > (type2)0 ? tmp : (type2)0;
-        c[i] = c[i] < six ? c[i] : six;
+        // c[i] = c[i] < six ? c[i] : six; // ut compute
       } else if (flag_act == 4) {  // leakey relu
         c[i] = tmp < (type2)0 ? (type2)(tmp * leakey_relu_alpha) : tmp;
       }