# Yosys Open Synthesis Suite: Yosys 0.70

> **Key Architectural Takeaway:** Yosys 0.70 Commands and options Added "-macc-only" to "alumacc" pass.

**Published:** 2026-10-13T09:20:48+00:00 
**Source:** Yosys Open Synthesis Suite 
**Category:** open-hardware 
**Canonical URL:** https://fosswire.org/news/yosys-open-synthesis-suite-yosys-070.html 

## Executive Summary
Yosys 0.70 Commands and options Added "-macc-only" to "alumacc" pass. Added "optbarriers" experimental pass for optimization barriers insertion Added "-barriers" to "flatten" and "prep" pass. Added "mcm" pass to replace constant multipliers with shared adder graphs. Added "-purge" to "rmports" pass. Added "-select" to "ltp" pass. Removed "read_xaiger2" pass. Various Added colored log messages output in terminal mode.

## Architectural & Systems Analysis
From a silicon and hardware engineering viewpoint:

- **Interface Neutrality:** Mitigates dependency on proprietary BSPs, empowering open toolchains to address hardware directly.
- **Supply Chain Verification:** Schematics and open pinouts allow deterministic audits against silicon errata.
- **Lifecycle Decoupling:** Decouples physical hardware utility from commercial vendor end-of-life obsolescence.

## Impact on the Open Ecosystem
Ensures that computational autonomy remains in the hands of the architect rather than closed silicon vendors.