Hello,
I'm trying to generate a divider core with Xilinx core generator
I'm confused about the signed/unsigned option, and it seems tha ther's a mistake in the datasheet of the core
dtatsheet
At the end of the first page, -9/4 is translated in binary in
strange way First, 9 is 1001 in unsigned, but -9 doesn't exist in signd binary a far as I can remember...
in the datasheet :
-9/4=9/-4=-(2 1/4
this corresponds to :
(1)0111/0100 or 1001/110
isn't that wrong
thank
Well, 10111 would be -9 in 5-bit binary, so it depends what you mean by "wrong". "Sloppy" might be a better word. I think it's a red herring though.
The point it's illustrating is that if the result of a signed division is negative, the quotient will always be negative (or zero). However, if you choose an *integer* remainder then it may differ in sign from the quotient; if you choose a *fractional* remainder then it will always have the same sign as the quotient.
Cheers,
-Ben-
"vinch" wrote i messag
aWell, 10111 would be -9 in 5-bit binary, so it depends what you mea b "wrong". "Sloppy" might be a better word. I think it's a red herrin though
The point it's illustrating is that if the result of a signed divisio
i negative, the quotient will always be negative (or zero). However, i yo choose an *integer* remainder then it may differ in sign from th quotient if you choose a *fractional* remainder then it will always have th sam sign as the quotient
Cheers
-Ben-[/quote:2e25e143ca
Ok cheers mate
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