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Signed Integer Division VHDL

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ranbi

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I wrote non-restoring parallel divider for 10 by 10. However i didnt get the speed i required. My main concern is speed. I didnt use the serialized divider coz of tht but I really need a fast signed division in vhdl. A code would be excellent but if any architecture available will be helpful too. I'm using modelsim. I'm designing my whole design in VHDL to implement an ASIC design. The divider is part of it and I think its the only reason why the entire design is slow. So plz any help in speeding up my divider

Thanks
 

ranbi said:
I wrote non-restoring parallel divider for 10 by 10. However i didnt get the speed i required. My main concern is speed. I didnt use the serialized divider coz of tht but I really need a fast signed division in vhdl. A code would be excellent but if any architecture available will be helpful too. I'm using modelsim. I'm designing my whole design in VHDL to implement an ASIC design. The divider is part of it and I think its the only reason why the entire design is slow. So plz any help in speeding up my divider

Thanks
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Google for lpm_divide. This will get you a pipelined divider. The clock frequency will be very good, and you can input new numbers to divide on every clock cycle, but you have to wait a number of clock cycles for the results to propogate through the pipeline.

Kevin Jennings
 
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    ranbi

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I googled lpm_divide but it seems i need to use altera to implement it. I'm using modelsim

---------- Post added at 08:09 ---------- Previous post was at 08:05 ----------

Thanks KJ i did more googling and found the lpm_divide package
 

ranbi said:
I googled lpm_divide but it seems i need to use altera to implement it. I'm using modelsim

---------- Post added at 08:09 ---------- Previous post was at 08:05 ----------

Thanks KJ i did more googling and found the lpm_divide package
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Hi Ranbi,

I googled, but could not find lpm_divide package. Can you tell me the link
 

Also, in the event you are dividing by a constant, you should instead use a multiplier by 1/x.

eg, compute x*(1024/k) and then keep the 10 msb's.
 

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