hanchenye-llvm-project/libclc/generic/lib/integer/abs.inc

_CLC_OVERLOAD _CLC_DEF __CLC_U_GENTYPE abs(__CLC_GENTYPE x) {
  return __builtin_astype((__CLC_GENTYPE)(x > (__CLC_GENTYPE)(0) ? x : -x), __CLC_U_GENTYPE);
}