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jolt/host/chez/seed
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Dmitri Sotnikov 4671e1b67e
Unbox ^double record field reads (#231) 
A record field tagged ^double now reads back as a flonum and feeds the numeric
pass, so hintless arithmetic over those fields lowers to fl-ops — the leaf-numeric
analog of the ^Vec3 nested-field hints. Combined with the whole-program :double
param inference, a vec3-dot over a ^double-fielded record unboxes end to end with
no per-fn hints.

records.ss: a ^double field tag passes through resolution, and the ctor (and a
mutable-field set!) coerce a ^double field to a flonum — JVM primitive-field
parity (jolt returned an exact 1, not 1.0, before), and what makes reading the
field back as :double sound for an fl-op.

types.clj: field-type-from-tag maps "double" -> :double, and a keyword/get lookup
whose result is :double annotates the node :num-read :double. numeric.clj reads
that annotation and classifies the field read as a :double operand, so the
enclosing arithmetic specializes — the read itself keeps its jrec-field-at/jolt-get
emit.

run-fieldnum.ss gate: ctor coercion (int field -> flonum), field-field arithmetic
emitting fl*/fl+, and an untagged field staying generic. make test / shakesmoke
green, selfhost holds, 0 new divergences.

Co-authored-by: Yogthos <yogthos@gmail.com>
2026-06-26 14:43:00 +00:00
..
image.ss Unbox ^double record field reads (#231) 2026-06-26 14:43:00 +00:00
prelude.ss See through or/and in truthy-elision (#224) 2026-06-26 06:11:35 +00:00
README.md Docs: Chez-only, drop the Janet-era references and obsolete migration notes 2026-06-22 09:05:35 -04:00

README.md

Chez bootstrap seed

These two files are the bootstrap compiler for jolt — the seed that makes the build self-hosting:

  • prelude.ss — the clojure.core prelude (all tiers + clojure.string/walk/ template/edn/set/pprint) as Scheme def-var! forms.
  • image.ss — the compiler image (jolt.ir + jolt.analyzer + jolt.backend-scheme) as Scheme def-var! forms.

Both are generated, not hand-written. They are checked in because a fresh checkout must be able to build jolt-on-Chez using only Chez: host/chez/bootstrap.ss loads this seed, then rebuilds the prelude + image from the .clj/.ss sources via the on-Chez compiler (read → analyze → emit, all on Chez). The seed is a joint byte-fixpoint: rebuilding from an up-to-date seed reproduces it exactly. make selfhost (host/chez/selfcheck.sh) runs host/chez/bootstrap.ss and diffs the rebuilt artifacts against the checked-in seed.

Re-minting

When the seed sources change (the core tiers, the compiler namespaces, the host contract, the reader, emit-image.ss), the seed drifts and make selfhost fails. Re-mint it by running host/chez/bootstrap.ss and writing the freshly rebuilt prelude/image back to host/chez/seed/prelude.ss / host/chez/seed/image.ss, then commit the refreshed files.