ActivePython 2.4 - Online Docs : 3.4.2 Limitations and other considerations





	advanced \| search help

Reference

ActivePython 2.4

Python Documentation

Library Reference

3. Python Runtime Services

3.4 fpectl -- Floating point exception control

3.4.2 Limitations and other considerations

4.2 Manifest-related options

MyASPN >> Reference >> ActivePython 2.4 >> Python Documentation >> Library Reference >> 3. Python Runtime Services >> 3.4 fpectl -- Floating point exception control

ActivePython 2.4 documentation

3.4.2 Limitations and other considerations

Setting up a given processor to trap IEEE-754 floating point errors currently requires custom code on a per-architecture basis. You may have to modify fpectl to control your particular hardware.

Conversion of an IEEE-754 exception to a Python exception requires that the wrapper macros PyFPE_START_PROTECT and PyFPE_END_PROTECT be inserted into your code in an appropriate fashion. Python itself has been modified to support the fpectl module, but many other codes of interest to numerical analysts have not.

The fpectl module is not thread-safe.

See Also:

Some files in the source distribution may be interesting in learning more about how this module operates. The include file Include/pyfpe.h discusses the implementation of this module at some length. Modules/fpetestmodule.c gives several examples of use. Many additional examples can be found in Objects/floatobject.c.

See About this document... for information on suggesting changes.