<jjuran>
68000 and 68010 have 16*16 -> 32 MUL and 32/16 -> 16r|16q DIV
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<clever>
jjuran: that reminds me, the vector core on the rpi also has a 16*16 -> 32 MUL opcode, that works on 16 lanes at once, ive tried to implement a 32bit mult with that, but ran into trouble with the addition step
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<jjuran>
clever: Sure, you can FOIL the multiplies, but you still have shifts and adds to do
<clever>
FOIL?
<clever>
and yeah, it was the 64bit add that i had trouble with
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<jjuran>
clever: First, Outer, Inner, Last
<jjuran>
(a + b)(c + d) —> ac + ad + bc + bd
<jjuran>
and recognizing that a longword is the sum of the low word and the shifted high word
<clever>
yeah, i did brute force my way into basically doing ah*bh, al*bl, ah*bl, and al*bh
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<geist>
so might be time to start doing something about my crashy server
<geist>
it's crashing so much now (about once a day or two) that it's unusuable
<geist>
i'm guessing i should start by reseating everything and then seeing if it explodes again
<GeDaMo>
I used to have an intermittent crashing problem that was caused by the power connector to the motherboard not having a latch :/
<geist>
yah. this is a hard lockup. the sytem just freezes cold, so dunno
<geist>
have to reset it
<GeDaMo>
Sometimes mine would freeze, other times it would try to reboot but fail somewhere in the BIOS checks making me think it was connected to drives or USB
<GeDaMo>
I jiggled a lot of cables before spotting it :P
<mrvn>
removing everything and cleaning all contacts could help
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<geist>
yah, i can't quite tell when it started, either when i put the new cpu in it (2700x -> 3950x) or when i added the 10gbe card
<geist>
so probably first thing after cleaning everything and if it continues i'll pull out the card next
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