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1.1.5 Special issues
1. The equations describing the algorithms are symbolic. If there is positive 1, the
number is the closest number to 1 that the resolution of the used fractional type
allows. If there are maximum or minimum values mentioned, check the range
allowed by the type of the particular function version.
2. The library functions require the core saturation mode to be turned off, otherwise the
results can be incorrect. Several specific library functions are immune to the setting
of the saturation mode.
3. The library functions round the result (the API contains Rnd) to the nearest (two's
complement rounding) or to the nearest even number (convergent round). The mode
used depends on the core option mode register (OMR) setting. See the core manual
for details.
4. All non-inline functions are implemented without storing any of the volatile registers
(refer to the compiler manual) used by the respective routine. Only the non-volatile
registers (C10, D10, R5) are saved by pushing the registers on the stack. Therefore, if
the particular registers initialized before the library function call are to be used after
the function call, it is necessary to save them manually.
1.2 Library integration into project (CodeWarrior™
Development Studio)
This section provides a step-by-step guide to quickly and easily integrate the MLIB into
an empty project using CodeWarrior™ Development Studio. This example uses the
MC56F8257 part, and the default installation path (C:\Freescale\FSLESL
\DSP56800E_FSLESL_4.2) is supposed. If you have a different installation path, you
must use that path instead.
1.2.1 New project
To start working on an application, create a new project. If the project already exists and
is open, skip to the next section. Follow the steps given below to create a new project.
1. Launch CodeWarrior™ Development Studio.
2. Choose File > New > Bareboard Project, so that the "New Bareboard Project" dialog
appears.
3. Type a name of the project, for example, MyProject01.
Freescale Semiconductor, Inc.
MLIB User's Guide, Rev. 2, 10/2015
Chapter 1 Library
15
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