[Fix] Remove std::trunc() in FloorDivideFunctor and InverseFloorDivideFunctor (#45051)

paddle/phi/kernels/funcs/elementwise_functor.h

@@ -570,7 +570,7 @@ struct FloorDivideFunctor {
 #ifndef PADDLE_WITH_XPU_KP
     PADDLE_ENFORCE(b != 0, DIV_ERROR_INFO);
 #endif
-    return static_cast<T>(std::trunc(a / b));
+    return static_cast<T>(a / b);
   }
 };
 
@@ -580,7 +580,7 @@ struct InverseFloorDivideFunctor {
 #ifndef PADDLE_WITH_XPU_KP
     PADDLE_ENFORCE(a != 0, DIV_ERROR_INFO);
 #endif
-    return static_cast<T>(std::trunc(b / a));
+    return static_cast<T>(b / a);
   }
 };