ALINT-PRO™ Adds New Mixed-Language Design Rules for More Predictable Cross-Language Integration

Henderson, NV – January 14, 2026 – Aldec, Inc., a pioneer in mixed HDL language simulation and verification solutions for FPGA and ASIC designs, today announced the availability of ALINT-PRO™ 2025.12, delivering a new set of design rules and guidance for mixed-language projects. The update helps engineering teams improve correctness, maintainability, and IP interoperability when combining VHDL and Verilog/SystemVerilog within a single project.

As mixed-language development becomes increasingly common for IP reuse, third-party integration, and long-life product maintenance, design teams face challenges caused by ambiguous mapping, inconsistent parameter passing, and configuration misuse. ALINT-PRO 2025.12 reduces these risks with a focused set of best-practice rules aimed at preventing integration issues before simulation, synthesis, and downstream verification.

“Mixed-language design is a reality for most FPGA and ASIC teams, but small instantiation and mapping inconsistencies can create time-consuming debug cycles,” said Louie De Luna, Chief Marketing Officer at Aldec. “With ALINT-PRO 2025.12, we’re providing designers with clear, enforceable rules that reduce ambiguity and improve predictability when VHDL and Verilog live in the same project.”

New Mixed-Language Design Rules in ALINT-PRO 2025.12 Premium Rule Library

The new ALINT-PRO 2025.12 rules establish a consistent methodology for module/entity instantiation across language boundaries. The rules are:

Verilog Module Instantiation in VHDL

• Use the component-based instantiation method for Verilog module instances in VHDL.
• Do not configure Verilog modules in VHDL configuration structures.
• Do not use component specifications for Verilog modules in RTL descriptions.
• Preserve case sensitivity between the Verilog unit name and its VHDL instance name.
• Use explicit port association for Verilog unit instantiations in VHDL.
• Pass all parameters to Verilog unit instantiations in VHDL, even if they are unchanged.

VHDL Unit Instantiation in Verilog

• Use explicit port association for VHDL unit instantiations in Verilog.
• Pass all parameters to VHDL unit instantiations in Verilog, even if they are unchanged.
• Do not use defparam for overriding VHDL instantiation parameters in Verilog.
• Use allowable generic mapping for VHDL units instantiated in Verilog.
• Use allowable port mapping for VHDL units instantiated in Verilog.

These rules are designed to reduce cross-language interpretation differences, ensure consistent elaboration behavior, and make design intent explicit, thus improving mixed-language integration success across simulation, linting, and synthesis flows.

Availability

ALINT-PRO 2025.12 is available immediately. Current users can access the update through Aldec support channels and product delivery mechanisms. Also, parties interested in evaluating the new mixed-language capabilities, as well as ALINT-PRO’s extensive static verification capabilities, can request a fully functional evaluation version of the tool.

ALINT-PRO 2025.12 is now available for download and evaluation.

About ALINT-PRO™

ALINT-PRO™ is a design verification solution for RTL code written in VHDL, Verilog, and SystemVerilog. It is focused on verifying coding style and naming conventions, RTL and post-synthesis simulation mismatches, smooth and optimal synthesis, correct FSM descriptions, clock and reset tree issues, CDC, RDC, DFT, and coding for portability and reuse.

About Aldec

Aldec Inc., headquartered in Henderson, Nevada, is an industry leader and pioneer in Electronic Design Verification. Established in 1984, Aldec offers patented verification technology in the areas of mixed-language RTL simulation, FPGA-based acceleration and emulation, multi-FPGA partitioning and SoC/ASIC prototyping, design rule checking, clock domain crossing analysis, logic synthesis, RTAX/RTSX prototyping of radiation-tolerant FPGAs for space applications, requirements traceability and functional verification for military, aerospace, avionics, automotive, medical, telecommunications and industrial applications. www.aldec.com