PGI Fortran Reference manual - The Portland Group

Fortran IntrinsicsSynopsisZEXT(A)ArgumentsThe argument A is of type logical or integer.Return ValueAn integer.6.27. Intrinsic ModulesLike an intrinsic function, the Fortran processor provides the intrinsic module. It is possible fora program to use an intrinsic module and a user-defined module of the same name, though theycannot both be referenced from the same scope.‣ To use a user-defined module rather than an intrinsic module, specify the keyword nonintrinsicin the USE statement:USE, non-intrinsic :: iso_fortran_env‣ To use an intrinsic module rather than a user-defined one, specify the keyword intrinsic inthe USE statement:USE, intrinsic :: iso_fortran_envIf both a user-defined and intrinsic module of the same name are available and locatable by the compiler,a USE statement without either of the keywords previously described accesses the user-defined module. Ifthe compiler cannot locate the user-defined module, it accessed the intrinsic module and does not issue awarning.6.27.1. Module IEEE_ARITHMETICThe ieee_arithmetic intrinsic module provides access to two derived types, namedconstants of these types, and a collection of generic procedures.This module behaves as if it contained a use statement for the module ieee_exceptions, soall the features of ieee_exceptions are included. For information of this module, refer to ModuleIEEE_EXCEPTIONS.6.27.2. IEEE_ARITHMETIC Derived TypesThe ieee_arithmetic intrinsic module provides access to these two derived types:ieee_class_type and ieee_round_type.ieee_class_typeIdentifies a class of floating point values.PGI Fortran Reference Guide 112