https://github.com/txmx/fasmg-arm6m

fasmg implementation of ARMv6-M instruction set
https://github.com/txmx/fasmg-arm6m

arm arm6 fasmg pio rp2040

Last synced: about 15 hours ago
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fasmg implementation of ARMv6-M instruction set

• Host: GitHub
• URL: https://github.com/txmx/fasmg-arm6m
• Owner: txmx
• Created: 2023-01-12T01:24:34.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-04-17T23:31:02.000Z (5 months ago)
• Last Synced: 2024-09-21T06:33:25.785Z (4 days ago)
• Topics: arm, arm6, fasmg, pio, rp2040
• Language: Assembly
• Homepage:
• Size: 36.1 KB
• Stars: 11
• Watchers: 1
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# fasmg ARM6-M

This is exclusively an implementation of the ARM6-M instruction set for [fasmg](https://flatassembler.net/docs.php?article=fasmg_manual). I made this for use specifically with the RP2040 chip, which contains a Cortex-M0+ processor.

The document used to create this was the ARMv6-M Architecture Reference Manual (DDI 0419E)

## Notes about some syntax changes

### 1. PIO

For PIO, the syntax is much stricter than the default implementation. Unlike the default assembler, this one doesn't allow liberal usage of commas between certain arguments for instructions. A feature provided, however, is sticky sideset, which uses the previously enabled side when omitted. It should be noted that while this can hopefully save an optional bit on occasion, it does not carry the same behavior.

### 2. ARM

Deprecated syntaxes were left unimplemented; deprecated encodings, however, were kept.