XFEATURE_PKRU
mask |= XFEATURE_PKRU;
eax |= XFEATURE_PKRU;
if (xcr0 & XFEATURE_PKRU)
} else if ((1ULL << subleaf) == XFEATURE_PKRU) {
XFEATURE_AVX512 | XFEATURE_PKRU | XFEATURE_AMX)