Intel Agilex® 7 Variable Precision DSP Blocks User Guide

ID 683037
Date 4/11/2023
Public

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3.1.2. 8 x 8 (Unsigned) or 9 x 9 (Signed) Sum of 4 Mode

The 8 x 8 (unsigned) or 9 x 9 sum of 4 mode uses the following equation:

resulta = (ax × ay) + (bx × by) + (cx × cy) + (dx × dy)

Figure 18.  9 × 9 Sum of 4 In this figure, the variables are defined as follows:
  • n = 8 and m = 8 for 8 x 8 unsigned operands
  • n = 9 and m = 9 for 9 x 9 signed operands