[Open-graphics] Synthesizing oga1hq

[Timothy Normand Miller]

On 8/13/07, Petter Urkedal <urkedal at nbi.dk> wrote:

> > I forget.  Do we care about signed multiplies?
>
> I did when I wrote the current version.  I'm not the expert of what
> we will need, but the sign logic is cheap anyway, right?

Sorta.  The multiplier blocks themselves can do signed (18-bit)
multiplies.  So we can multiply two signed 16-bit numbers to get a
signed 32-bit number.  But how do you multiply two 32-bit signed to
get a 64-bit signed?  I know it can be done.  I just can't work it out
in my head right now.  :/

-- 
Timothy Normand Miller
http://www.cse.ohio-state.edu/~millerti
Open Graphics Project