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A small and efficient Forth implementation
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add bye to x86 		4 weeks ago
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README.md

foci

foci is a small Forth implementation that prioritizes performance and portability. This threaded Forth implementation uses CPU registers and native execution to maximize efficiency.

Register usage is the only platform-specific requirement; otherwise, foci is written in 100% portable C. There is active support for x86_64, ARM Cortex-M, and MSP430 architectures.

foci compiles to a binary object that can easily be linked into another application. Code size is less than 5 kB, while RAM usage is in the hundreds of bytes (primarily influenced by the configured stack and dictionary sizes).

Available words

dup drop swap rot -rot over tuck @ ! c@ c! + +! - * / mod and or xor = < [ ] ,
cell cell+ cells base here allot latest negate invert 1- 1+ aligned align : ;
literal if then else ' ['] execute decimal hex . emit begin until again while
repeat >r r> 2>r 2r> r@ do loop i immediate

Build instructions

Run make with a supported architecture target:

  • make x86-64: x86_64 processors (i386 is not supported)
  • make arm-cm4: ARM Cortex-M4 microcontrollers
  • make msp430: TI MSP430 microcontrollers