Motorola DSP56800 Guía de usuario descargar pdf (Pagina 407)

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Pragmas for the DSP56800 and DSP56800E

Pragma Reference

407Targeting MC56F83xx/DSP5685x Controllers

Remarks

If you enable this pragma, integer longs within structures are aligned on four byte

boundaries. When this pragma is disabled there is no alignment within structures. This

pragma does not correspond to any setting in the C/C++ Language

panel. To check

this setting, use __option(packstruct), described in Checking

Settings. By default, this pragma is enabled.

peephole

Controls the use peephole optimization.

Prototype

#pragma peephole on | off | reset

Remarks

If you enable this pragma, the compiler performs peephole optimizations, which are

small, local optimizations that eliminate some compare instructions and improve

branch sequences.

For the DSP56800, this pragma corresponds to the Peephole Optimization setting

in the M56800 Processor settings panel. Yet for the DSP56800E, there is no

corresponding setting for the the M56800E Processor settings panel. To check this

setting, use __option (peephole), described in Checking Settings

pool_strings

Controls how the compiler stores string constants.

Compatibility

This pragma is not compatible with the DSP56800, but it is compatible with the

DSP56800E.

Prototype

#pragma pool_strings on | off | reset

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Motorola DSP56800 Guía de usuario Pagina 407

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