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inikotin's avatar
inikotin
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18 days ago

Three 9x9 multipliers in one DSP

Hello everyone, Do have somebody the project example with three 9x9 multipliers in one DSP looks like in this post:  How to configure DSP block in "three 9x9 multipliers" mode? | Altera C...
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CheepinC_altera's avatar
CheepinC_altera
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11 days ago

Hi,


Sorry for the delay in responding. I overlooked this inquiry.


As I understand it, you would like to pack three 9×9 multipliers into a single DSP block. Currently, your compilation is mapping each 9×9 multiplier to a separate DSP block.


For your information, when sufficient DSP resources are available, Quartus typically assigns one DSP block per multiplier to optimize performance and simplify implementation. Packing multiple multipliers into a single DSP block is generally considered only when DSP resources are constrained.


Similar to the forum post you referenced, you may try increasing the overall DSP utilization or applying a Logic Lock region to encourage resource packing. These approaches may help Quartus select a more resource-efficient implementation.


Please let me know if you have any further questions or if you would like to share your design details for further review.


Thank you.

  • inikotin's avatar
    inikotin
    Icon for New Contributor rankNew Contributor
    9 days ago

    Thank you for your answer. I made it with logic lock region. It's solved it.

    • CheepinC_altera's avatar
      CheepinC_altera
      Icon for Regular Contributor rankRegular Contributor
      8 days ago

      Hi,

      Thanks for your update. Glad to hear that you have resolved it. Thank you.