[Libre-soc-bugs] [Bug 425] DIV overflow not being calculated correctly

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Fri Jul 10 11:36:48 BST 2020


--- Comment #11 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #9)

> there should not be any spuriously set msb bits

ok i checked when setting compare_len back to bitwidth * 3 and quotient_root
was set to 0x1ffffffffffffffffd at the end.

i suspect then that there are not enough bits in some places, which
tends to suggest that there may be an undiscovered bug in the
div_pipe code for other cases.

all of this is pointing strongly towards simply using microwatt's FSM
for now.

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