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Phase 7j: words buffers + w[i] word indexing (retire peek32/poke32)

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32-bit word access is indexing now, not peek32/poke32:

  peek32(ui_rx, i)       -> ui_rx[i]        (reads an int)
  poke32(rt_fb, i, c)    -> rt_fb[i] = c    (writes an int)

A buffer typed `words` (a pointer whose elements are i32) indexes with `w[i]`
as a full int; a plain `ptr`/`str` keeps byte indexing. emit_index_addr picks the
element type from the base's type — byte-identical IR to the old intrinsics, so
the migration reproduces the compiler and every golden render exactly.

The ~60 word buffers (rt_fb, tt_*/gc_* font tables, png_px/spr_px pixels, ui_*
layout arrays) were retyped from `ptr` to `words` scope-aware (per-function, so
the s/out/p byte-vs-word name collisions across functions stay correct), then the
254 peek32/poke32 sites migrated to indexing. A scope-analysis miss left 12
buffers (gc_*, sc_d, ui_rx/ui_ry) un-retyped — caught as a menu golden diff and
fixed. No true mixed byte+word access exists on any one variable, so a per-buffer
element type is sound.

Reseeded (22527 lines); C-free fixpoint holds; goldens byte-identical; 18/18;
vocab (byte/words types in, peek32/poke32 out) + doc-fences clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-08-28 02:20:50 +03:00
parent 454427bce8
commit ae0bae0457
17 changed files with 3032 additions and 3118 deletions
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9
selfhost/emit_addr.ludic
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@ -21,9 +21,14 @@ fn emit_member_addr(e: Node) -> ptr {
# address of `base[index]` (slices only in this subset)
fn emit_index_addr(e: Node) -> ptr {
let base = emit_expr(e.a)
if not is_slice_ty(base.ty) { # a raw ptr/str: address of byte i.
if not is_slice_ty(base.ty) { # a raw pointer: address of element i
let bi = emit_expr(e.b) # (evaluate index first — it may set g_addr_ty)
let r = emit_bind(`getelementptr inbounds i8, ptr {base.code}, i32 {bi.code}`)
if (base.ty == "words") { # a `words` buffer: 32-bit elements
let rw = emit_bind(`getelementptr inbounds i32, ptr {base.code}, i32 {bi.code}`)
g_addr_ty = "int"
return rw
}
let r = emit_bind(`getelementptr inbounds i8, ptr {base.code}, i32 {bi.code}`) # a ptr/str: bytes
g_addr_ty = "byte" # set last so the caller sees it
return r
}