radv,nir: optimize vkd3d-proton's MSAD instruction
Apparently this DXIL instruction is used by FSR 3. The unoptimized sequence is horrible, but I don't know how much of an effect this has on actual FSR 3 shaders.
Apparently this DXIL instruction is used by FSR 3. The unoptimized sequence is horrible, but I don't know how much of an effect this has on actual FSR 3 shaders.