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| <title>The GNU Fortran Compiler: IEEE modules</title> |
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| <a name="IEEE-modules_003a-IEEE_005fEXCEPTIONS_002c-IEEE_005fARITHMETIC_002c-and-IEEE_005fFEATURES"></a> |
| <h3 class="section">10.3 IEEE modules: <code>IEEE_EXCEPTIONS</code>, <code>IEEE_ARITHMETIC</code>, and <code>IEEE_FEATURES</code></h3> |
| <dl compact="compact"> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>Fortran 2003 and later |
| </p></dd> |
| </dl> |
| |
| <p>The <code>IEEE_EXCEPTIONS</code>, <code>IEEE_ARITHMETIC</code>, and <code>IEEE_FEATURES</code> |
| intrinsic modules provide support for exceptions and IEEE arithmetic, as |
| defined in Fortran 2003 and later standards, and the IEC 60559:1989 standard |
| (<em>Binary floating-point arithmetic for microprocessor systems</em>). These |
| modules are only provided on the following supported platforms: |
| </p> |
| <ul> |
| <li> i386 and x86_64 processors |
| </li><li> platforms which use the GNU C Library (glibc) |
| </li><li> platforms with support for SysV/386 routines for floating point |
| interface (including Solaris and BSDs) |
| </li><li> platforms with the AIX OS |
| </li></ul> |
| |
| <p>For full compliance with the Fortran standards, code using the |
| <code>IEEE_EXCEPTIONS</code> or <code>IEEE_ARITHMETIC</code> modules should be compiled |
| with the following options: <code>-fno-unsafe-math-optimizations |
| -frounding-math -fsignaling-nans</code>. |
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