3.1 KiB
Yes – minimal but noted.
https://github.com/guitarvydas/forthish is a low-activity educational repo (26 commits, 1 star, last touched years ago) containing progressive Python prototypes that teach Forth internals by building up from scratch.
What aligns (conceptually useful for your dictionary / threading baseline before x86 asm)
-
Direct Threaded Code (DTC) implementation (explicitly called out in
fcomp.py):"If you care, this is effectively a DTC (Direct Threaded Code) implementation."
-
Execution tokens (
xt) + classic dictionary layout (name field / link field / code field) infram.py. -
Compilation state machine (
statevar: 0=interpret, 1=compile) + colon definitions (:,;,if/else/then, literals, branches) infcomp.py. -
Progressive layering:
simple.py(bare stack + parser)
fram.py(dictionary +xt+execute)
fvars.py(memory,!@,)
fcomp.py(full user words + DTC)
No ColorForth, no 32-bit tokens/tags, no sourceless, no hex-editor, no tape-drive scatter, no 2-reg stack, no x86-64/machine-code, no live reload, no Lottes/Onat mentions.
It does link out to things you already have (colorforth.github.io, JonesForth, Chuck Moore papers).
Bottom line: Pure high-level teaching aid for understanding DTC / xt / dictionary mechanics in a readable Python form. Not a direct blueprint for your zero-overhead x86 token array + hex frontend, but could serve as a clean reference if you want to sketch the threading model before dropping it into asm.
That’s everything worthwhile in the repo. Nothing deeper.
Yes.
Zydis fully supports encoding (code generation / assembling raw bytes from instruction structs) via the stable ZydisEncoder API.
- Core library (not separate module)
- Production-ready since ~v4.0 (current stable: v4.1.1 as of Feb 2025)
- Zero dynamic allocation, thread-safe, tiny overhead — perfect fit for your instant <5 ms token → x86-64 emission in the sourceless ColorForth derivative
- Companion zasm (https://github.com/zyantific/zasm) gives AsmJit-style C++ frontend on top of the same encoder (mentioned in your ASM_Notes)
Minimal encoding example (C, direct from official README)
ZydisEncoderRequest req;
memset(&req, 0, sizeof(req));
req.mnemonic = ZYDIS_MNEMONIC_MOV;
req.machine_mode = ZYDIS_MACHINE_MODE_LONG_64;
req.operand_count = 2;
req.operands[0].type = ZYDIS_OPERAND_TYPE_REGISTER;
req.operands[0].reg.value = ZYDIS_REGISTER_RAX;
req.operands[1].type = ZYDIS_OPERAND_TYPE_IMMEDIATE;
req.operands[1].imm.u = 0x1337;
ZyanU8 encoded[ZYDIS_MAX_INSTRUCTION_LENGTH];
ZyanUSize len = sizeof(encoded);
if (ZYAN_SUCCESS(ZydisEncoderEncodeInstruction(&req, encoded, &len))) {
// encoded now holds e.g. 48 C7 C0 37 13 00 00
}
This is exactly the kind of zero-overhead emitter you can drop into your 32-bit token compiler loop (pair with Zydis decoder for round-tripping if needed).
Full docs: https://doc.zydis.re/v4.1.0/html/group__encoder
Repo: https://github.com/zyantific/zydis (examples/ folder has more)
Nothing else needed unless you want a stripped minimal build snippet or zasm wrapper example.