v1.39.0

1.39.0 - 2025-11-20

Added

• boxcar: Add boxcar function to compose bit masks
• heaviside: Add Heaviside function to compose bit masks
• ring_buffer: Add ring buffer with sequential write and random reads
• trip_counter: Add counter with 'trip' output when reaching threshold value

Changed

• cb_filter, id_queue, lzc, rr_arb_tree: Speed up Verilator simulation
• cdc_fifo_gray*, isochronous_spill_register: Change flip-flops without to flip-flops with reset
• isochronous_spill_register: Remove unnecessary data stability assertions
• addr_decode*: Change assumed integer index to arbitrary type (default remains integer)

Fixed

• id_queue: Fix struct access
• cdc_fifo_gray*: Fix Spyglass linting edge case
• lzc: Fix assertion for degenerate case WIDTH == 0
• Fix Verilator compilation by adding guard statements