nx_cpuid_lib.nx

nx_cpuid_lib.nx -- PURE decode of x86-64 cpuid(7,0):EBX, the structured extended-feature register. WHY: nx_prim_gap reported cpu-feature-detect as MISSING across all 256 registry primitives, which read as 'the ecosystem cannot see its own silicon'. THAT WAS A DISCOVERY FAILURE, NOT A CAPABILITY ONE -- runtime/nx_cpu_features.nx already does REAL cpuid via the __cpuid_ebx intrinsic (nx_types OP_CPUID_EBX =133, emitted as raw bytes 0F A2 because sovereign nxasm has no cpuid mnemonic). But it exposes only THREE bits (BMI2/ADX/both) out of a register that ALREADY CARRIES AVX2, the whole AVX-512 family, SHA, BMI1, RDSEED, ADX and CLFLUSHOPT. The data was fetched and thrown away. LAW: a capability that no registry can see is indistinguishable from one that does not exist. EVERYTHING HERE IS PURE (ebx value in -> answer out). That is deliberate and load-bearing: it lets the gate prove AVX-512 decoding CORRECT ON HARDWARE THAT HAS NO AVX-512, by feeding synthetic registers. A detector you can only test on silicon you own is a detector you cannot trust for future silicon -- and future silicon is the entire point of this primitive. license_tier: ORIGINAL Read-only. No hw writes (Rule 26).