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<clever>
samueldr: rpi4 firmware update!, ive got the basic vpu stuff fully working on a 4, but the power domain isnt responding right, so the arm bringup is on hold
<samueldr>
nice!
<clever>
samueldr: but i have had a play with the matrix math stuff, and now have some basic examples of how to do uint32_t[16] * uint32_t
<clever>
samueldr: or uint32_t[1024] * constant
<clever>
it can do 8bit, 16bit, or 32bit ops, add, mult, distance??, over rows of 16 values at a time, and repeat up to 64 times
<clever>
this has an overview of the vector stuff, and i can now answer some questions about details it lacks
<clever>
v16ld HX(0++,0), (%2+=%3) REP64
<clever>
v16ld, says to load 16bit ints from ram (it can be mismatched from the matrix size)
<clever>
HX says to use 16bit fields within the matrix
<clever>
HX(0++,0) says to start at coordinate 0,0, and to increment the row#, and to reference a 16 wide row of data
<clever>
,(r0+=r1) says to load the values from the address in r0, and to increment it by r1 for each row
<clever>
and REP64 says to repeat the operation 64 times
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<Smith[m]>
samueldr: Took 12h to build your PBP sd-image on a qemu aarch64 nixos vm :D
<Smith[m]>
Do you think it will be faster if we remove module like amdgpu and nouveau ?
<samueldr>
I'm building the kernel "as nixos does", but if you customize the build further removing features it'll be faster
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<Smith[m]>
Ok.. I’m new to building kernel and system image ... I assume I can add ‘DRM_AMDGPU n’ to extraConfig to exclude the module? It’ll be easier to test thibgs if we can speed up the build right?
<samueldr>
yeah, any CONFIG_* options, you put only the part after CONFIG_ there