tree ddd81c2c9c321e6b1b246ac0d7378a4cd9153571
parent 9684f2cfd6faa598ca7ea0ad4bdd4b8459b29219
author George Steed <george.steed@arm.com> 1683737408 +0100
committer James Zern <jzern@google.com> 1684193976 +0000

Use TBL for z2 predictor on AArch64 Neon

The existing code loads each lane of the resulting vector independently,
however in this case the range of possible values for indices is
sufficiently small such that we can simply load all possible values and
then use TBL to select the appropriate ones.

The 'q' variants of the TBL intrinsics are only available in AArch64, so
restrict the new implementation appropriately.

Change-Id: I9d168a093c91525aed7a60e3ef7bd877c293b43e