dangernoodle-io / TaipanMiner / 25350149181

90%

push

github

refactor(sha): share abc-block builder + extend AHB lockstep to 1000 iters (#341)

M2: Extract sha256_build_abc_block() helper to eliminate duplication of
the "abc" known-answer vector setup (64-byte input block). AHB and DPORT
self-tests both inline the same memset + 4 byte writes; centralize for
maintainability. Prototype added to sha256.h.

M3: Extract sha256_hw_ahb_self_test_lockstep(uint32_t iters) from the
embedded 8-iter test inside sha256_hw_ahb_self_test. Parameterize iteration
count to match DPORT's 1000-nonce pattern. Call from sha256_hw_ahb_boot_probes
with iters=1000 to mirror DPORT's boot coverage. Identical structure and
logging prefix ("lockstep self-test: N nonces / PASS"). AHB gains parity
with DPORT's 1000-nonce lockstep coverage (vs. 8 previously).

Both M2 and M3 preserve existing quick 8-iter AHB sanity check in
sha256_hw_ahb_self_test (no boot-time cost change, both functions complete
in ~10ms combined). Add test_sha256_build_abc_block unit test validating
the block pattern. Coverage holds at 96% lines.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

744 of 908 branches covered (81.94%)

Branch coverage included in aggregate %.

0 of 8 new or added lines in 1 file covered. (0.0%)

1635 of 1692 relevant lines covered (96.63%)

487935.74 hits per line