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

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

svbfloat16_t svtbx[_bf16](svbfloat16_t fallback, svbfloat16_t data, svuint16_t indices)

svfloat16_t svtbx[_f16](svfloat16_t fallback, svfloat16_t data, svuint16_t indices)

svint16_t svtbx[_s16](svint16_t fallback, svint16_t data, svuint16_t indices)

svuint16_t svtbx[_u16](svuint16_t fallback, svuint16_t data, svuint16_t indices)

128-bit SVE

For each 16-bit index from (2), if 0 ≤ (2) < 8, set (4) to the 16-bit element at that index in (1), otherwise preserve the value from (3).

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

For each 16-bit index from (2), if 0 ≤ (2) < 32, set (4) to the 16-bit element at that index in (1), otherwise preserve the value from (3).

Larger sizes

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

For each 16-bit index from (2), if 0 ≤ (2) < 128, set (4) to the 16-bit element at that index in (1), otherwise preserve the value from (3).