diff --git a/src/include/common/int.h b/src/include/common/int.h
new file mode 100644
index e44d42f..e6907c6
*** a/src/include/common/int.h
--- b/src/include/common/int.h
*************** pg_add_s16_overflow(int16 a, int16 b, in
*** 41,47 ****
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 41,47 ----
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a - b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
*************** pg_sub_s16_overflow(int16 a, int16 b, in
*** 61,67 ****
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 61,67 ----
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a * b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
*************** pg_add_s32_overflow(int32 a, int32 b, in
*** 101,107 ****
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 101,107 ----
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a - b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
*************** pg_sub_s32_overflow(int32 a, int32 b, in
*** 121,127 ****
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 121,127 ----
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a * b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
*************** pg_add_s64_overflow(int64 a, int64 b, in
*** 167,173 ****
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 167,173 ----
  }
  
  /*
!  * If a - b overflows, return true, otherwise store the result of a - b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
*************** pg_sub_s64_overflow(int64 a, int64 b, in
*** 193,199 ****
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a + b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */
--- 193,199 ----
  }
  
  /*
!  * If a * b overflows, return true, otherwise store the result of a * b into
   * *result. The content of *result is implementation defined in case of
   * overflow.
   */