https://gpuopen.com/fidelityfx-spd/
AMD FidelityFX™ Single Pass Downsampler (SPD) - AMD GPUOpen
AMD FidelityFX Single Pass Downsampler (SPD) provides an AMD RDNA™ architecture optimized solution for generating up to 12 MIP levels of a texture.
single pass downsampleramdspd
https://gpuopen.com/news/fidelityfx-single-pass-downsampler-spd-v2-0-is-now-available/
FidelityFX Single Pass Downsampler (SPD) v2.0 released - AMD GPUOpen
FidelityFX SPD (Single Pass Downsampler) 2.0 is now available. Find out about the new features!
single pass downsamplerspdamd