tree f21b37e21fe9c46d7e572a8014064076e1f4fc32
parent 1d6f72b89e53e0b71d00a230446206e385d4dbf5
author Nemanja Ivanovic <nemanja.i.ibm@gmail.com> 1637750041 -0600
committer Copybara-Service <copybara-worker@google.com> 1637757999 -0800

[PowerPC] Provide XL-compatible vec_round implementation

The XL implementation of vec_round for vector double uses
"round-to-nearest, ties to even" just as the vector float
`version does. However clang and gcc use "round-to-nearest-away"
for vector double and "round-to-nearest, ties to even"
for vector float.

The XL behaviour is implemented under the __XL_COMPAT_ALTIVEC__
macro similarly to other instances of incompatibility.

Differential revision: https://reviews.llvm.org/D113642

GitOrigin-RevId: b7bf937bbee38c2db0c0640176ef618d9c746538