File size: 8,067 Bytes
909e920 cef6fe9 909e920 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | # Expected digests
All digests below are SHA-256, lowercase hex. These are the pinned values
a conforming clean-room implementation of `docs/CIS2_SPEC_v0.3b.md` (current)
MUST reproduce bit-for-bit. No timing numbers are recorded anywhere in this
repository by policy. Historical v0.2 digests are kept below for reference.
## Primary normative test vector (§13.1, spec v0.3b): SmolLM2-135M, `gen_toks=16`
Model: `HuggingFaceTB/SmolLM2-135M`, prompt `"Once upon a time"`, 16
greedy-decoded tokens, fp32 compute. Only `table_digest` and `CIS2_REF`
changed from v0.2 (RoPE range-reduction fix, see CHANGELOG.md v0.3/v0.3b);
`inv_freq_table_digest`, `argmax_digest`, and `generated_token_ids` are
unchanged from v0.1/v0.2.
```
weights_sha256 = 80521b40281d6ce74e35c9282c22539e75aa0ac8578892b2a59955ef78d55da1
config_sha256 = 1d556eab73b69c7f11f64c557a2f9c6f440bd4c6b89bb2584a6b498c92603843
tokenizer_sha256 = 9ca9acddb6525a194ec8ac7a87f24fbba7232a9a15ffa1af0c1224fcd888e47c
table_digest = 23c7bfaf5cef0095fd021af2eb1808abb4928bae4219756d86bdac670a06b35d
inv_freq_table_digest = da9f6dcfde0425588815509e874515cdcd3d6b8818b6d0136590052e7bbf6f12
argmax_digest = 0b9c8f3ac90d0b9cd5f1719ac327dca1fc639fd87468305fccebbe3d56f67aff
generated_token_ids = 28,665,436,253,1838,8180,3365,14176,30,2306,4161,281,253,2066,2291,351
CIS2_REF (witness digest) = d82743059d1db929e710236fe4ec37f89e6f932524801345a006980f7c3cc9df
```
This is the value `scripts/self_check.sh` builds `verify3/` and compares
against.
## Historical: spec v0.2 primary test vector (superseded)
Model: `HuggingFaceTB/SmolLM2-135M`, prompt `"Once upon a time"`, 16
greedy-decoded tokens, fp32 compute.
```
weights_sha256 = 80521b40281d6ce74e35c9282c22539e75aa0ac8578892b2a59955ef78d55da1
config_sha256 = 1d556eab73b69c7f11f64c557a2f9c6f440bd4c6b89bb2584a6b498c92603843
tokenizer_sha256 = 9ca9acddb6525a194ec8ac7a87f24fbba7232a9a15ffa1af0c1224fcd888e47c
table_digest = 465d358ccd63721256dbd2abbc77ad5de755adf3230635f95b12b1727dfa1ea3
inv_freq_table_digest = da9f6dcfde0425588815509e874515cdcd3d6b8818b6d0136590052e7bbf6f12
argmax_digest = 0b9c8f3ac90d0b9cd5f1719ac327dca1fc639fd87468305fccebbe3d56f67aff
generated_token_ids = 28,665,436,253,1838,8180,3365,14176,30,2306,4161,281,253,2066,2291,351
CIS2_REF (witness digest) = a0c563ef804f50413b7fb6619ae4afe9b51b1ffa7655e944221393e85d6261da
```
Superseded by the v0.3b vector above; `scripts/self_check.sh` now targets
v0.3b's `CIS2_REF`.
**Note:** the informative 128-token, Qwen2.5-0.5B, and scale/horizon
vectors below were generated and confirmed against spec v0.2 only; they
have not been re-run against v0.3b as part of this port.
## GPU confirmation of the §13.1 normative vector
The `CIS2_REF` value above was reproduced bit-for-bit by an independent CUDA
implementation on an NVIDIA Tesla P100 (sm_60) on 2026-09-08, alongside a
byte-identical per-step trace. Full result, scope limits and provenance:
`docs/GPU_RESULT.md`. One further informative vector was pinned by that run —
the same model and prompt at a longer horizon:
```
SmolLM2-135M, "Once upon a time", gen_toks=128, spec v0.3b
CIS2_REF = 22f69ad87a615d66a77efaca8b1172d22bdfb4bd5092ceffd302e35669a050f6
```
Two further digests from that run belong to a **candidate** pinned-tree
reduction order that is not part of v0.3b and is not normative; they are
recorded in `docs/GPU_RESULT.md` only.
## Informative: 128-token prompt set (SmolLM2-135M, spec v0.2)
Five prompts of varying length, `gen_toks=128` each, confirmed identical
between x86_64 and aarch64 CI runners. These are informative
cross-ISA evidence, not §13.1 normative test vectors.
| prompt_idx | prompt_toks | `CIS2_REF` digest (`gen_toks=128`) |
|---|---|---|
| 0 | 4 | `e8d4f83fe623c329e2a56acb0efb0aa11614eda168e009ffcd014da110d5ac7d` |
| 1 | 11 | `e805baec6a932ff74d933ff0b51df045a75603f5409536a5325e46ab5a7ccc05` |
| 2 | 11 | `cf1ef40e0fda59fc72218e8f7daa9935e3f15083a1d92c4cde9729d8b015b803` |
| 3 | 19 | `ee1247798e49f766adf10b64fb9cce07ee9cf80a34394e5e38c47485939c6c01` |
| 4 | 215 | `135f50b5850e9e7bf31ee4fd9b935a002c7627cce6e1b7260e665e726c2c450b` |
## Informative: SmolLM2-360M (second-model-scale evidence, same family/tokenizer)
Not a §13.1 test vector (that role belongs to SmolLM2-135M above); exercises
the reference construction (`src/`, not the clean-rooms) against a second,
genuinely different checkpoint in the same model family — 32 layers vs. 9,
hidden_size 960 vs. 576, `rope_theta=100000` (same as 135M) — sharing only the
tokenizer with the primary vector. Confirmed bit-identical between an AVX2
x86_64 machine and a scalar (no AVX2/FMA) x86_64 machine on 2026-09-22.
```
Model: HuggingFaceTB/SmolLM2-360M, prompt "Once upon a time", gen_toks=16, spec v0.3b, dtype=fp32
weights_sha256 = 7aaff6661428bed033abba9522bec81938678642cca3181fe752b6ca9e1e540f
config_sha256 = 34f7801487078de7e434e19162c497e5cc6ff397080e40e8586627cb68a5168a
tokenizer_sha256 = 9ca9acddb6525a194ec8ac7a87f24fbba7232a9a15ffa1af0c1224fcd888e47c
table_digest = 23c7bfaf5cef0095fd021af2eb1808abb4928bae4219756d86bdac670a06b35d
inv_freq_table_digest = da9f6dcfde0425588815509e874515cdcd3d6b8818b6d0136590052e7bbf6f12
argmax_digest = 90681903ebafdc4f8d8141be882e19b95b7a2c0f0761f16fa213df196db794a8
generated_token_ids = 28,281,253,1666,1869,2025,28,665,436,253,9077,1379,1217,260,476,61
CIS2_REF (witness digest) = 3d159b94fd7a241fcc380bb6bc158cf03a6b4c13c03f46325c8a91d75c477dad
```
Reproduced via `src/` (`cis2_ref --weights-dir <dir>`, default `--gen-toks 16`)
on:
- x86_64, AVX2, `aefinity-box` (box1) — 23.9s wall.
- x86_64, scalar (no AVX2/FMA — Intel Celeron N4020), `aefinity-box2` (box2),
same commit, cross-machine replay — 43.2s wall.
Both machines produced the identical witness/argmax/table/inv_freq_table
digests above, byte-for-byte, in a single run per machine (not just the
in-process two-run check). `table_digest` and `inv_freq_table_digest` are
identical to the primary SmolLM2-135M vector, as expected — both are
independent of model weights (the transcendental-polynomial table is a
fixed constant, and `rope_theta=100000` is shared with 135M).
## Informative: Qwen2.5-0.5B (theta-general RoPE exercise, `rope_theta=1000000`)
Not a §13.1 test vector; exercises §7's general RoPE construction against
a second model family with a different `rope_theta` and vocab size.
| gen_toks | `CIS2_REF` digest |
|---|---|
| 16 | `2c9f623589520aba9cc557edf53185808086f5f6f81cab5e78ee136d0375344c` |
| 128 | `dccd55e68a44eae3d62e36092295b40f980a07e1be72aadf37fe14ca306b20e7` |
## Scale/horizon evidence: Qwen2.5-1.5B and SmolLM2-135M at longer horizons
A later hardening pass confirmed x86_64/aarch64 digest equality (not
listed here as literal hex — the source report records pass/fail
assertions, not the raw digest values) for:
- Qwen2.5-1.5B (~1.5B parameters) at `gen_toks` = 16, 128, and 512, plus a
PyTorch fp32 oracle comparison at 16 and 512 tokens.
- SmolLM2-135M at `gen_toks=512`.
These are cited here as evidence of scale- and horizon-robustness, not as
reproducible literal digests in this document; a reproducer wanting exact
hex values for these cases should regenerate them by running the
reference construction at the stated (model, `gen_toks`) pairs and
checking x86_64 vs. aarch64 equality directly, per §13.2 of the spec.
## Sources
- Reference-implementation CI results and hardware logs (private
repository, not included here — see README "Scope").
- `docs/E15j_CLEANROOM_C_RESULT.md`-equivalent CI run (C clean-room,
`verify3/`), CI run id `33200155942` (post-§12.1-fix, 4/4 bit-exact on
x86_64/aarch64 x gcc/clang).
- Rust clean-room (`verify2/`) CI run id `33194049057` (spec v0.2, both
ISAs).
- Cross-ISA/compiler-invariance matrix CI run id `33195649908` (20/20
cells).
- Longer-horizon/scale hardening CI run id `33214545380` (9/9 jobs).
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