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erlang: Phase 9f — hot-BIF opcode table (+18 vm tests)

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giles
2026-05-14 21:26:51 +00:00
parent 3efd735283
commit e8a5c2e1ba
5 changed files with 91 additions and 6 deletions
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62
lib/erlang/tests/vm.sx
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@@ -304,4 +304,66 @@
(er-vm-test "reset resets pid counter"
(er-vm-dispatch 134 (list er-vm-fn (list))) 0)
;; ── Phase 9f — hot-BIF dispatch table ───────────────────────────
;; Each opcode skips the registry lookup and calls the underlying
;; er-bif-* directly. Verify each returns the same result as going
;; through er-apply-bif.
(er-vm-test "BIF_LENGTH opcode by id"
(get (er-vm-lookup-opcode-by-id 136) :name) "OP_BIF_LENGTH")
(er-vm-test "BIF_LENGTH on 3-cons"
(er-vm-dispatch 136
(list (er-mk-cons 1 (er-mk-cons 2 (er-mk-cons 3 (er-mk-nil))))))
3)
(er-vm-test "BIF_HD on cons"
(er-vm-dispatch 137 (list (er-mk-cons 99 (er-mk-nil)))) 99)
(er-vm-test "BIF_TL is cons"
(er-cons? (er-vm-dispatch 138
(list (er-mk-cons 1 (er-mk-cons 2 (er-mk-nil)))))) true)
(er-vm-test "BIF_ELEMENT pulls index"
(er-vm-dispatch 139 (list 2 (er-mk-tuple (list "a" "b" "c")))) "b")
(er-vm-test "BIF_TUPLE_SIZE on 4-tuple"
(er-vm-dispatch 140 (list (er-mk-tuple (list 1 2 3 4)))) 4)
(er-vm-test "BIF_LISTS_REVERSE preserves elements"
(er-list-length (er-vm-dispatch 141
(list (er-mk-cons 1 (er-mk-cons 2 (er-mk-cons 3 (er-mk-nil))))))) 3)
(er-vm-test "BIF_LISTS_REVERSE actually reverses"
(get (er-vm-dispatch 141
(list (er-mk-cons 1 (er-mk-cons 2 (er-mk-cons 3 (er-mk-nil)))))) :head) 3)
(er-vm-test "BIF_IS_INTEGER true on int"
(get (er-vm-dispatch 142 (list 42)) :name) "true")
(er-vm-test "BIF_IS_INTEGER false on float"
(get (er-vm-dispatch 142 (list 3.14)) :name) "false")
(er-vm-test "BIF_IS_ATOM true"
(get (er-vm-dispatch 143 (list (er-mk-atom "ok"))) :name) "true")
(er-vm-test "BIF_IS_ATOM false on int"
(get (er-vm-dispatch 143 (list 7)) :name) "false")
(er-vm-test "BIF_IS_LIST true on cons"
(get (er-vm-dispatch 144
(list (er-mk-cons 1 (er-mk-nil)))) :name) "true")
(er-vm-test "BIF_IS_LIST true on nil"
(get (er-vm-dispatch 144 (list (er-mk-nil))) :name) "true")
(er-vm-test "BIF_IS_LIST false on tuple"
(get (er-vm-dispatch 144 (list (er-mk-tuple (list)))) :name) "false")
(er-vm-test "BIF_IS_TUPLE true"
(get (er-vm-dispatch 145 (list (er-mk-tuple (list 1)))) :name) "true")
(er-vm-test "BIF_IS_TUPLE false on int"
(get (er-vm-dispatch 145 (list 5)) :name) "false")
;; Sanity: total opcode count grew (3 patterns + perform + handle +
;; receive-scan + spawn + send + 10 hot-BIFs = 16+ registered).
(er-vm-test "opcode list has 16+"
(>= (len (er-vm-list-opcodes)) 16) true)
(define er-vm-test-summary (str "vm " er-vm-test-pass "/" er-vm-test-count))