nx_f32_parity.nx

nx_f32_parity.nx -- differential-parity measurement organ: the MEASURED-EXCEED engine for the Z-Image benchmark (operator 2026-06-30 "use z image as the benchmark... until we exceed them"). Per [[feedback-no-wave-measured-exceed]] an EXCEED is MEASURED head-to-head, never self-graded. This is the reusable primitive every "our sovereign op vs the sdcpp/ggml oracle" gate composes: feed identical inputs/weights to our f32 organ AND ggml's op, then nx_f32_parity_check(ours, ref, n, tol) renders a PASS/FAIL verdict + the max abs error. Reference values are reference KATs extracted from ggml/sdcpp (the same pattern `nx_q4k_to_f32`'s bit-vs-ggml gate already uses). Parity-first, then exceed. f32 magnitude compare trick: for FINITE values the bit pattern with the sign bit cleared (raw & 0x7FFFFFFF) is monotonic in magnitude, so |a-b| as an f32 magnitude pattern is order-comparable as a plain integer, and clearing the sign of (a-b) yields |a-b| itself as a positive f32 value (returned as max_abs). ours, ref: flat *i64 f32 bits [n]. tol_abs: f32 (the parity tolerance). out_maxabs[0] <- max |error| (f32). license_tier: ORIGINAL