nextpnr 0.7

• Himbächel API improvements including timing support
• New arch API for global constants removing the need for complex pseudo-networks
• Himbächel Gowin uarch with several improvements over the old Gowin arch
• Timing support for MachXO2/3
• Simulation-based signoff timing for mistral
• Refactored timing analysis engine

Several new experimental projects:

• xc7 uarch for Himbächel
• static electrostatic placer
• partial Rust bindings

nextpnr 0.6

• New Himbächel framework, following the footsteps of Viaduct to also lower the barrier to entry to develop nextpnr support for devices with a deduplicated database (scaling to 200k+ LUTs compared to the <20k LUTs of Viaduct). See docs/himbaechel.md for more information.
• fabulous: support improvements for MPW2 silicon
• machxo2: several new features supported (LUTRAM, carry chains, global clocks, BRAM, PLLs); MachXO3 support added
• gowin: I/O DDR and SERDES supported
• Miscellaneous iCE40 and ECP5 bugfixes

nextpnr 0.5

• nexus: Support for timing analysis through DCCs
• gowin: Initial PLL and global clock support, general improvements
• fabulous: MUX support, bugfixes
• ice40: better IO error handling
• Fix various cases where placer or router gets stuck

nextpnr 0.4

• ECP5 switches to a split-slice view (separate LUT/FF bels) allowing higher utilisations
• several improvements to the gowin arch
• vendored pybind11 update to support Python 3.11
• iCE40, ECP5 and nexus bugfixes
• viaduct uarch for FABulous eFPGA fabrics
• initial PseudoCell API for region ports and other uses
• continued cleanups and refactoring (including new ctx->idf(...) API)

nextpnr 0.3

• internal netlist structure changes to make adding/removing net users faster
• optional parallel placement refinement (--parallel-refine) as a 2-3x faster replacement to the SA placement refinment pass
• experimental M10K support for the mistral arch
• nexus & gowin arch improvements

nextpnr 0.2

• Adds initial version of the Viaduct API
• ECP5 and Nexus performance improvements
• Mistral updates

nextpnr 0.1

first tagged release of nextpnr!