- Standard:
Fortran 2003 and later

The `IEEE_EXCEPTIONS`

, `IEEE_ARITHMETIC`

, and `IEEE_FEATURES`

intrinsic modules provide support for exceptions and IEEE arithmetic, as defined in Fortran 2003 and later standards, and the IEC 60559:1989 standard (*Binary floating-point arithmetic for microprocessor systems*). These modules are only provided on the following supported platforms:

- i386 and x86_64 processors
- platforms which use the GNU C Library (glibc)
- platforms with support for SysV/386 routines for floating point interface (including Solaris and BSDs)
- platforms with the AIX OS

For full compliance with the Fortran standards, code using the `IEEE_EXCEPTIONS`

or `IEEE_ARITHMETIC`

modules should be compiled with the following options: ```
-fno-unsafe-math-optimizations
-frounding-math -fsignaling-nans
```

.

© Free Software Foundation

Licensed under the GNU Free Documentation License, Version 1.3.

https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gfortran/IEEE-modules.html