TBX: Programmable table lookup in single vector table (merging)

TBX Zd.D, Zn.D, Zm.D (SVE2 (SME

svfloat64_t svtbx[_f64](svfloat64_t fallback, svfloat64_t data, svuint64_t indices)

svint64_t svtbx[_s64](svint64_t fallback, svint64_t data, svuint64_t indices)

svuint64_t svtbx[_u64](svuint64_t fallback, svuint64_t data, svuint64_t indices)

128-bit SVE

For each 64-bit index from (2), if 0 ≤ (2) < 2, set (4) to the 64-bit element at that index in (1), otherwise preserve the value from (3).

For each 64-bit index from (2), if 0 ≤ (2) < 4, set (4) to the 64-bit element at that index in (1), otherwise preserve the value from (3).

For each 64-bit index from (2), if 0 ≤ (2) < 8, set (4) to the 64-bit element at that index in (1), otherwise preserve the value from (3).

Larger sizes

For each 64-bit index from (2), if 0 ≤ (2) < 16, set (4) to the 64-bit element at that index in (1), otherwise preserve the value from (3).

For each 64-bit index from (2), if 0 ≤ (2) < 32, set (4) to the 64-bit element at that index in (1), otherwise preserve the value from (3).