Intel® Quartus® Prime Pro Edition User Guide: Getting Started

ID 683463
Date 12/04/2023
Public
Document Table of Contents

4.2.4.9. Avoiding Assignment Mixing in Always Blocks

Intel® Quartus® Prime Pro Edition synthesis does not allow mixed use of blocking and non-blocking assignments within ALWAYS blocks. Other Quartus software products allow mixed use of blocking and non-blocking assignments within ALWAYS blocks. To avoid syntax errors, ensure that ALWAYS block assignments are of the same type for Intel® Quartus® Prime Pro Edition migration.
Table 19.  ALWAYS Block Assignment Differences
Other Quartus Software Products Intel® Quartus® Prime Pro Edition
Synthesis honors the mixed blocking and non-blocking assignments, although the Verilog Language Specification no longer supports this construct. Synthesis generates a syntax error for detection of mixed blocking and non-blocking assignments within an ALWAYS block.