Hi Randall, in your case,
https://github.com/gnuradio/volk/blob/main/kernels/volk/volk_32f_x2_multiply_32f.h followed by https://github.com/gnuradio/volk/blob/main/kernels/volk/volk_32f_x2_add_32f.h would be the way to go at the moment. ``` volk_32f_x2_multiply_32f(multiply_result, b, c, num_samples); volk_32f_x2_add_32f(a, a, multiply_result, num_samples); ``` You're welcome to start a new kernel ``` volk_32f_x3_multiply_add_32f(out, a, b, c, num_samples); ``` In fact, it would be a great addition to VOLK. Cheers Johannes On 16.08.22 01:38, Randall Wayth wrote:
Thanks for the suggestions and apologies for not being 100% clear at the start.I'm not looking for a dot product. I'm looking for a[i] += b[i]*c[i] specifically for floating point So it would be the equivalent of IPP's ippsAddProduct_32f.The application is to apply a window to a set of samples before accumulating, to implement a weighted overlap add PFB. In my case the samples are real-valued, but I could also see a case for a and b being complex, or the case for b being 8 or 16-bit ints with a and c being floating point.Cheers, Randall
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