Article ID: 000080067 Content Type: Troubleshooting Last Reviewed: 02/13/2006

Can I have operands with different signs feeding the multipliers in Stratix™ devices?

Environment

  • DSP
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description Yes. There are two separate digital signal processing (DSP) block sign control signals: "Sign A" and "Sign B." A logical 1 on the sign control signal indicates that the operand is a signed number. The result of the multiplication will be a signed number if any one of the operands is a signed number. The Sign A and Sign B signals affect the entire DSP block. Therefore, all the Data A inputs feeding into the same DSP block must have the same sign representation. Similarly, all the Data B inputs feeding into the same DSP block must have the same sign representation. By default, the DSP block will implement signed multiplication.

    Related Products

    This article applies to 1 products

    Stratix® FPGAs