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Changelog

All notable changes to afs-as are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.1.0 - 2026-04-06

Initial release. The standalone surface, library API, and differential test suite are documented in README.md.

Added

ARM64 instruction encoding for the supported standalone surface, including data processing, loads/stores, branches, FP/SIMD, atomics, system, and CFI.
Two-pass assembler with label resolution, expression classification, and Mach-O relocation emission (PAGE21, PAGEOFF12, BRANCH26, GOT_LOAD_*, TLVP_LOAD_*, SUBTRACTOR, UNSIGNED, ADDEND).
Mach-O 64 object writer: header, segment, sections, symbol table, dynamic symbol table, build version, and linker optimization hints.
Standalone CLI (afs-as) with --help, --version, -o, -, --, and documented exit codes.
Library API: assemble_source, assemble_stmts, assemble_instructions. assemble_instructions is a trusted fast path used by the ARMFORTAS compiler and panics on invalid Inst values by design.
Diagnostics with file, line, column, source snippet, and caret.
Layered test infrastructure: instruction-level differential against Apple as, full-object corpus parity, round-trip stability, structured fuzzing, garbage panic-resistance fuzzing, structured malformed-mutation rejection, end-to-end link/run, CLI smoke, diagnostic snapshots, performance sanity, and a clang probe dashboard covering ~94 C patterns at -O0 and -O2.

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        1
        # Changelog
      
        2
        
        3
        All notable changes to `afs-as` are documented in this file.
      
        4
        
        5
        The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
      
        6
        and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
      
        7
        
        8
        ## [Unreleased]
      
        9
        
        10
        ## [0.1.0] - 2026-04-06
      
        11
        
        12
        Initial release. The standalone surface, library API, and differential test
      
        13
        suite are documented in `README.md`.
      
        14
        
        15
        ### Added
      
        16
        
        17
        - ARM64 instruction encoding for the supported standalone surface, including
      
        18
          data processing, loads/stores, branches, FP/SIMD, atomics, system, and CFI.
      
        19
        - Two-pass assembler with label resolution, expression classification, and
      
        20
          Mach-O relocation emission (`PAGE21`, `PAGEOFF12`, `BRANCH26`, `GOT_LOAD_*`,
      
        21
          `TLVP_LOAD_*`, `SUBTRACTOR`, `UNSIGNED`, `ADDEND`).
      
        22
        - Mach-O 64 object writer: header, segment, sections, symbol table, dynamic
      
        23
          symbol table, build version, and linker optimization hints.
      
        24
        - Standalone CLI (`afs-as`) with `--help`, `--version`, `-o`, `-`, `--`, and
      
        25
          documented exit codes.
      
        26
        - Library API: `assemble_source`, `assemble_stmts`, `assemble_instructions`.
      
        27
          `assemble_instructions` is a trusted fast path used by the ARMFORTAS
      
        28
          compiler and panics on invalid `Inst` values by design.
      
        29
        - Diagnostics with file, line, column, source snippet, and caret.
      
        30
        - Layered test infrastructure: instruction-level differential against Apple
      
        31
          `as`, full-object corpus parity, round-trip stability, structured fuzzing,
      
        32
          garbage panic-resistance fuzzing, structured malformed-mutation rejection,
      
        33
          end-to-end link/run, CLI smoke, diagnostic snapshots, performance sanity,
      
        34
          and a clang probe dashboard covering ~94 C patterns at `-O0` and `-O2`.
      
        35
        
        36
        [Unreleased]: https://github.com/FortranGoingOnForty/afs-as/compare/v0.1.0...HEAD
      
        37
        [0.1.0]: https://github.com/FortranGoingOnForty/afs-as/releases/tag/v0.1.0

1	# Changelog
2
3	All notable changes to `afs-as` are documented in this file.
4
5	The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6	and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
7
8	## [Unreleased]
9
10	## [0.1.0] - 2026-04-06
11
12	Initial release. The standalone surface, library API, and differential test
13	suite are documented in `README.md`.
14
15	### Added
16
17	- ARM64 instruction encoding for the supported standalone surface, including
18	data processing, loads/stores, branches, FP/SIMD, atomics, system, and CFI.
19	- Two-pass assembler with label resolution, expression classification, and
20	Mach-O relocation emission (`PAGE21`, `PAGEOFF12`, `BRANCH26`, `GOT_LOAD_*`,
21	`TLVP_LOAD_*`, `SUBTRACTOR`, `UNSIGNED`, `ADDEND`).
22	- Mach-O 64 object writer: header, segment, sections, symbol table, dynamic
23	symbol table, build version, and linker optimization hints.
24	- Standalone CLI (`afs-as`) with `--help`, `--version`, `-o`, `-`, `--`, and
25	documented exit codes.
26	- Library API: `assemble_source`, `assemble_stmts`, `assemble_instructions`.
27	`assemble_instructions` is a trusted fast path used by the ARMFORTAS
28	compiler and panics on invalid `Inst` values by design.
29	- Diagnostics with file, line, column, source snippet, and caret.
30	- Layered test infrastructure: instruction-level differential against Apple
31	`as`, full-object corpus parity, round-trip stability, structured fuzzing,
32	garbage panic-resistance fuzzing, structured malformed-mutation rejection,
33	end-to-end link/run, CLI smoke, diagnostic snapshots, performance sanity,
34	and a clang probe dashboard covering ~94 C patterns at `-O0` and `-O2`.
35
36	[Unreleased]: https://github.com/FortranGoingOnForty/afs-as/compare/v0.1.0...HEAD
37	[0.1.0]: https://github.com/FortranGoingOnForty/afs-as/releases/tag/v0.1.0