Pre-adder Square Mode Feature in Intel® Stratix® 10 DSP Implemented as an External ALM

Description

The DSP User Guides wrongly indicate that the pre-adder should be inside the DSP block in the following figures:

Figure 13. Pre-adder Square Mode (Intel FPGA Integer Arithmetic IP Cores User Guide)

Figure 36. Pre-adder Square Mode (Intel® Stratix® 10 Variable Precision DSP Blocks User Guide) 

Resolution

However, Intel® Stratix® 10 DSP atom does not support pre-adder square mode.

You can still use this feature by using the Intel FPGA Multiply Adder IP, but the pre-adder square mode is implemented as an external ALM.