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Author	SHA1	Message	Date
giles	eb4233ff36	Add inline VM opcodes for hot primitives (OP_ADD through OP_DEC) 16 new opcodes (160-175) bypass the CALL_PRIM hashtable lookup for the most frequently called primitives: Arithmetic: OP_ADD, OP_SUB, OP_MUL, OP_DIV, OP_INC, OP_DEC, OP_NEG Comparison: OP_EQ, OP_LT, OP_GT, OP_NOT Collection: OP_LEN, OP_FIRST, OP_REST, OP_NTH, OP_CONS The compiler (compiler.sx) recognizes these names at compile time and emits the inline opcode instead of CALL_PRIM. The opcode is self- contained — no constant pool index, no argc byte. Each primitive is a single byte in the bytecode stream. Implementation in all three VMs: - OCaml (sx_vm.ml): direct pattern match, no allocation - SX spec (vm.sx): delegates to existing primitives - JS (transpiled): same as SX spec 66 new tests in spec/tests/vm-inline.sx covering arithmetic, comparison, collection ops, composition, and edge cases. Tests: 1314 JS (full), 1114 OCaml, 32 Playwright Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-03-24 20:10:48 +00:00
giles	23c8b97cb1	VM spec in SX + 72 tests passing on both JS and OCaml spec/vm.sx — bytecode VM written in SX (the spec): - Stack-based interpreter for bytecode from compiler.sx - 24 opcodes: constants, variables (local/upvalue/global), control flow, function calls (with TCO), closures with upvalue capture, collections, string concat, define - Upvalue cells for shared mutable closure variables - Call dispatch: vm-closure (fast path), native-fn, CEK fallback - Platform interface: 7 primitives (vm-stack-*, call-primitive, cek-call, get-primitive, env-parent) spec/tests/test-vm.sx — 72 tests exercising compile→bytecode→VM pipeline: constants, arithmetic, comparison, control flow (if/when/cond/case/and/or), let bindings, lambda, closures, upvalue mutation, TCO (10K iterations), collections, strings, define, letrec, quasiquote, threading, integration (fibonacci, recursive map/filter/reduce, compose) spec/compiler.sx — fix :else keyword detection in case/cond compilation (was comparing Keyword object to evaluated string, now checks type) Platform primitives added (JS + OCaml): make-vm-stack, vm-stack-get, vm-stack-set!, vm-stack-length, vm-stack-copy!, primitive?, get-primitive, call-primitive, set-nth! (JS) Test runners updated to load bytecode.sx + compiler.sx + vm.sx for --full. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-03-24 01:20:00 +00:00

Author

SHA1

Message

Date

giles

eb4233ff36

Add inline VM opcodes for hot primitives (OP_ADD through OP_DEC)

16 new opcodes (160-175) bypass the CALL_PRIM hashtable lookup for
the most frequently called primitives:

  Arithmetic: OP_ADD, OP_SUB, OP_MUL, OP_DIV, OP_INC, OP_DEC, OP_NEG
  Comparison: OP_EQ, OP_LT, OP_GT, OP_NOT
  Collection: OP_LEN, OP_FIRST, OP_REST, OP_NTH, OP_CONS

The compiler (compiler.sx) recognizes these names at compile time and
emits the inline opcode instead of CALL_PRIM. The opcode is self-
contained — no constant pool index, no argc byte. Each primitive is
a single byte in the bytecode stream.

Implementation in all three VMs:
- OCaml (sx_vm.ml): direct pattern match, no allocation
- SX spec (vm.sx): delegates to existing primitives
- JS (transpiled): same as SX spec

66 new tests in spec/tests/vm-inline.sx covering arithmetic, comparison,
collection ops, composition, and edge cases.

Tests: 1314 JS (full), 1114 OCaml, 32 Playwright

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-24 20:10:48 +00:00

giles

23c8b97cb1

VM spec in SX + 72 tests passing on both JS and OCaml

spec/vm.sx — bytecode VM written in SX (the spec):
  - Stack-based interpreter for bytecode from compiler.sx
  - 24 opcodes: constants, variables (local/upvalue/global), control flow,
    function calls (with TCO), closures with upvalue capture, collections,
    string concat, define
  - Upvalue cells for shared mutable closure variables
  - Call dispatch: vm-closure (fast path), native-fn, CEK fallback
  - Platform interface: 7 primitives (vm-stack-*, call-primitive, cek-call,
    get-primitive, env-parent)

spec/tests/test-vm.sx — 72 tests exercising compile→bytecode→VM pipeline:
  constants, arithmetic, comparison, control flow (if/when/cond/case/and/or),
  let bindings, lambda, closures, upvalue mutation, TCO (10K iterations),
  collections, strings, define, letrec, quasiquote, threading, integration
  (fibonacci, recursive map/filter/reduce, compose)

spec/compiler.sx — fix :else keyword detection in case/cond compilation
  (was comparing Keyword object to evaluated string, now checks type)

Platform primitives added (JS + OCaml):
  make-vm-stack, vm-stack-get, vm-stack-set!, vm-stack-length, vm-stack-copy!,
  primitive?, get-primitive, call-primitive, set-nth! (JS)

Test runners updated to load bytecode.sx + compiler.sx + vm.sx for --full.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-24 01:20:00 +00:00

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