Table of Contents
Alignment calculation in three instructions
Found in a 2025-08-29 changeset of the ecm fork of WarpLink:
mov bx, [alignment_table + bx] ; bx = alignment mask and ax, bx neg ax and ax, bx
and neg and. That's odd. I assume it works because I would have worked it out at the time but it's not intuitive.
Late mid February work on WarpLink
2026-02-22
Recent WarpLink tests
These tests were written to test several of the wlcalc and wllist features during their development. They're all stored in https://pushbx.org/ecm/test/20260204/
Early mid February extensions to WarpLink
This is not actually a regulation Sunday blog post as I didn't prepare it on the HP 95LX, due to the place I usually write these being closed for the carnival days.
This week I prepared some new extensions to the WarpLink OMF linker, most of which was originally written in 1989 through 1993, and released to the public domain in 1999. I have been working on WarpLink since 2023.
The new extensions I did as yet are split into three categories:
- wlemitalign, sections which emit their alignment even if they are empty or part of the nobits trail.
- wlcalc, post-link calculations that are applied to the executable file after the main linking is done.
- wllist, allowing to collect patch lists pointing into certain segments without having to manually update the lists.