[Open-graphics] Multipliers in oga1hq
Farhan Mohamed Ali
farhan at cmu.edu
Mon Sep 17 18:26:29 EDT 2007
Petter Urkedal wrote:
> On 2007-09-15, Farhan Mohamed Ali wrote:
>> I have read a little about bit-serial multipliers, but i'm still not
>> perfectly clear about it. I'm having some trouble visualizing the
>> dataflow. Do you have any good references for your design?
> Unfortunately, I don't have anything other than the already quoted
> http://www.andraka.com/multipli.htm, where the second entry has the
> basic circuit layout. But, this has probably been described decades
> ago, I just didn't look much since I though it was more fun to treat the
> serial-multiplier problem as an exercise. (I now also have a version
> widened to process two bits at a time.)
> As you have probably seen from the "Sample VGA code..." thread, it seems
> we don't need a multiplier at all in the nanocontroller. Understanding
> multipliers may become more relevant in preparing the graphics pipeline
> for ASIC.
Oops, didn't notice that. Could have saved me some sleep over the past
week! I'll look for something else to work on then. For the ASIC, seems
unlikely to me that we will have to resort to using sequential
multipliers, unless we are really die size constrained.
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