CDSP Library Functions - CDSPLib
The CDSPLib library is a collection of standard DSP routines and applications available for fast porting / implementation on the CDSP variants. Depending on the CDSP customization option, the library will have variations in the code, while still providing a number of standard features. The library is modeled in C++ using some basic objects that simulate the behavior of the arithmetic and addressing circuits of the CDSP; the specific assembly code for a processor customization option can be generated via an almost one-to-one translation of the C++ code.
A unique convention has been adopted for (almost) all the input and output vectors involved in the DSP functions: given a number of N samples to be processed, the vectors will have an address range of [-N/2 , +N/2-1]; this means that the definition domain of the input and output data will be centered around Zero.
Because the CDSP is a fixed-point processor, some restrictions are imposed on the input and output data values for each of the DSP functions; each function documents its corresponding limitations. These restrictions guarantee predictable results for the DSP functions; the main effect of these restrictions is to prevent (unexpected) arithmetic overflows and/or underflows during the fixed-point calculations.