rajamesandClaude Opus 5.5
8f37e15f8a
Q.* now forms its products in the order a1*b1 (low cell), a0*b1, a1*b0, a0*b0, dropping each input after its last use, with b0 waiting on the return stack. Each sign correction, (b1<0 ? a0 : 0) and (a1<0 ? b0 : 0), is folded into cell 2 as soon as its operands are adjacent, using -if rather than 0< calls. At most four live values sit under any UM* call. Headroom (data cells under args / return entries): 2/2 -> 3/3. Same checks as before at 32- and 64-bit cells, optimised and ASan+UBSan; dropping either sign correction fails about 9900 checks. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
v4/
StarForth v4: the 32-instruction F18-derived core. The design lives in
docs/v4.0.0/JUSTIFICATION.md (why) and docs/v4.0.0/DECOMPOSITION.md
(every v3 word mapped to a v4 fate).
The first deliverable is the hosted C99 golden model (JUSTIFICATION.md §10,
step 1). It must pass POST and hold K≡1.0 with 32- and 64-bit cells on all
three host ISAs.
What exists so far is the single node: registers, circular stacks, memory, all
32 opcodes, and per-opcode and per-call-target heat. make -C v4 test builds
and runs the tests at both cell widths; make -C v4 sanitize repeats them
under ASan and UBSan. There is no compiler capsule, no POST and no K
measurement yet.