Re: [Discuss-gnuradio] GMSK Gaussian filter byte alignment?

[Eric Blossom]

On Wed, Oct 31, 2007 at 06:21:37PM -0400, George Nychis wrote:
> Hey all,
> 
> I've been playing around with GMSK and reading through the code of the 
> processing blocks. I see that the dot product code for the Gaussian 
> filter is optimized such that it requires the data be 16-byte aligned. 
> Where does this alignment actually occur in the processing chain?
> 
> On the modulation path, the flow is NRZ->GF->FM:
> gr_bytes_to_syms()->gr_firdes::gaussian()->gr_frequency_modulator_fc()
> 
> I'm assuming the data coming out of gr_bytes_to_syms() is not 16-byte 
> aligned, yet the data that comes in to the Gaussian filter is 16-byte 
> aligned.  So, where does this alignment actually occur?

The buffers are all page aligned.

Eric