It is claimed that this DSP can perform 40-bit fixed-point arithmetic, but the maximum bit width of an integer in C/C++ is 32 bits. So, it is unclear how one would use the 40-bit fixed-point arithmetic. I'm guessing that the 40 bits are divided between two 32-bit words. It would be great if TI provided some documentation to explain how this works, and perhaps even a couple of examples.
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