This document describes the macros in:
C:\git\~tgrysztar\fasm2\include\macro\proc64.inc
The file is a Win64-oriented call/procedure macro layer for the fasmg dialect. It is small enough to read in one sitting, but dense enough that a few details are easy to miss. Some of those details are merely convenient tricks; others are serious footguns.
The source revision inspected here is the file dated 2026-02-24 21:53:30.