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DSPLIB logarithm error?

Alberto Lessio
Prodigy 70 points
Other Parts Discussed in Thread: TMS320C5515

Hello,

I'm working on a TMS320C5515 DSP. My application computes a logarithm using the log_10 function of DSPLIB for C55x.

The function is described as:

ushort oflag = log_10 (DATA *x, LDATA *r, ushort nx)

I would like to know what is the maximum error introduced by this function. Given that my input (x) has a +/- 1 lsb error, what is the maximum resulting error for the output (r)?

Apparently this information is missing from the documentation. I'm going to perform some tests, but I would like to know if some knowledge already exists on this argument.

Thanks for the attention,

                                              Alberto